JPH1034564A - Small electric device and battery pack for the small electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability interlocked with a main switch by providing a battery pack with a battery that can feed to an equipment body being interlocked with on-operation of the main switch, and an electronic circuit having specified function in small electrical equipment such as a charged type electric drill. SOLUTION: In a battery pack 26 consisting of a body case with a battery 24 and an electronic circuit 27 enclosed therein and an illuminating part including a light source 44, when a change-over switch 62 is switched to an automatic control mode, a control signal S4 is outputted from a timer circuit 54 only for the set time until the voltage value of a capacitor 76 exceeds second reference voltage V2, and a current flows to the light source 44. The residual capacity of the battery 24 is thereby confirmed. When a main switch 22 is turned on, the charging voltage S3 of the capacitor 76 is rapidly discharged, and the control signal S4 is sent to a driving circuit 56 from the timer circuit 54, so that a current flows again to the light source 44. When the main switch 22 is turned off, the light source 44 is automatically put out with a delay of set time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small electric device having a battery as a drive source, such as a rechargeable electric drill, and a battery pack used for the small electric device.

[0002]

2. Description of the Related Art Conventionally, as a small electric device of this type, the present applicant previously provided illumination means on a battery pack detachably provided at a base end side of a grip portion of a power tool to illuminate a work site with light. He proposed what was to be done.
No. 9).

[0003]

However, the above-mentioned illuminating means has a switch dedicated to lighting, and the operator turns on the switch in response to the time when light irradiation is required. There was a problem of inferiority.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned inconvenience, and a small electric device excellent in operability is provided by turning on and off a lighting unit in conjunction with a main switch for driving the small electric device. And a battery pack.

[0005]

As shown in FIG. 1, a small electric apparatus according to the present invention has a general structure.
The apparatus includes a predetermined device main body 10, a main switch 22 on the device main body 10 for restricting the operation timing on and off, and a battery pack 26 detachably attached to the device main body 10.

The battery pack 26 has a main switch 22.
A battery 24 that enables power supply to the device main body 10 in conjunction with the ON operation of the device, and an electronic circuit 27 having a predetermined function as illustrated in FIG. In conjunction with battery pack 2
The drive timing of the electronic circuit 27 provided on the sixth side can be regulated.

The above-described regulation operation of the electronic circuit 27 by the main switch 22 starts the drive of the function of the electronic circuit 27 almost simultaneously with the ON operation of the main switch 22.
The function drive can be stopped with a delay of the set time Δt from the OFF operation of the main switch 22.

The above-mentioned electronic circuit 27 has a plurality of functions as shown in FIG.
Alternatively, the number of times of the ON operation of No. 2 may be counted, and the function to be driven corresponding to the counted number may be selected.

Further, an electronic circuit 27 provided in the battery pack 26 can irradiate a workpiece to be machined by the electric tool, and the main body 22 is operated in conjunction with the number of times the main switch 22 is turned on. It is possible to change the length of the set time Δt after the switch 22 is turned off. The function selected in conjunction with the number of times the main switch 22 is turned on may include a function of displaying the current capacity of the battery 24.

In addition to the automatic control mode which operates in conjunction with the operation of the main switch 22, there is provided a changeover switch 62 for selectively selecting a mode in which the light is always turned off and a mode in which the light is always turned on. You may. The operation in the automatic control mode is performed by simultaneously detecting the current supplied from the built-in battery 24 to the device main body 10 in response to the turning on of the main switch 22. It is also possible to control the light irradiation intensity in accordance with the value detected by the detection means.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of a small electric device according to the present invention will be specifically described below based on an example in which an electric drill including a device main body 10 and a battery pack 26 is implemented. Needless to say, the present invention can be carried out in substantially the same manner for various small electric devices provided with a battery pack.

The apparatus main body 10 has substantially the same configuration as a conventional electric drill, and as shown in FIGS. 1 to 3, a drill body 14 having a drill bit 12 detachably provided at a distal end thereof, and a drill body 14 having the same. And a handle 16 extending substantially perpendicularly downward from the base end of the battery pack 26. A part of the battery pack 26 can be removably stored in the handle 16 through an opening 18 provided at the lower end.

At the same time as the insertion of the battery pack 26, the motor 20 and the handle 1 provided in the drill body 14 are provided.
A power supply circuit is formed between the battery 24 in the battery pack 26 and the battery 24 in the battery pack 26 which is connected in series with the main switch 22 provided on the battery 6. The motor 20 is energized to rotate the motor 20.

The battery pack 26 according to the present invention is used in place of a conventional battery pack.
And a body case 28 containing an electronic circuit 27 to be described later.
And a lighting unit 30 that emits light when energized by the battery 24 in the main body case 28.

The main body case 28 is a hollow housing having a substantially rectangular shape, and has an insertion portion 32 having a size that is removably fitted into the opening 18 provided in the handle 16 of the tool main body 10 from the upper surface side. On the other hand, the illumination unit 30 is provided on the lower surface side so as to swing freely.

The illuminating section 30 pivotally supports one end of a narrow plate-shaped arm body 34 with respect to one lower edge of the main body case 28 via a rotating shaft 36, while the other end of the arm body 34 has The light-emitting body 38 is pivotally supported via a rotating shaft 40.

The luminous body 38 has a light source 44 disposed at a focal position of a parabolic reflector 42. When not used, the arm body 34 and the luminous body 38 are connected to the main body case as shown in FIG. The light source 44 is closed by fitting it into the storage groove 46 provided in the hole 28, but in use, the arm 34 and the light emitter 38 are turned over as shown in FIG. 48 so that it can be located at the work site.

The configuration of the illumination section 30 is merely an example, and the specific configuration of the illumination section 30 can be arbitrarily changed, for example, the luminous body 38 is directly mounted on the main body case 28 without providing the arm 34. It is.

Electronic circuit 27 housed in main body case 28
Are two electrodes 50 provided on the insertion portion 32 as shown in FIG.
The motor 20 and the lighting unit 3 in the drill body 14 are connected to the circuit of the device body 10 through the
0, a detection circuit 52 that outputs a predetermined detection signal S2 when the energization timing for the motor 20 is detected, and starts output of a control signal S4 when the detection signal S2 is input. A timer circuit 54 in which the output of the control signal S4 is stopped with a delay of the set time Δt after the input is stopped, a driving circuit 56 for energizing the light source 44 corresponding to the input period of the control signal S4, The light amount control circuit 58 includes a light receiving surface at a predetermined position, and a changeover switch 62 that includes a switch knob 60 on the lower surface side of the arm body 34 to enable the mode switching of the illumination unit 30.

The detection circuit 52 includes a first reference voltage V obtained by dividing a battery voltage by resistors 66 and 66 to an inverting input side of a comparator 64.
When the main switch 22 is turned on, a detection resistor 68 having a relatively small resistance value is interposed in the power supply circuit from the battery 24 to the motor 20.
Is applied to the non-inverting input side of the comparator 64 so that "H"
The level detection signal S2 is output from the comparator 64.

The timer circuit 54 applies a second reference voltage V2 obtained by dividing the battery voltage by the resistors 72 to the non-inverting input side of the comparator 70, and includes a resistor 75 and a capacitor 76 on the inverting input side. A switching transistor 78 that is turned on in conjunction with the input of the detection signal S2 is provided in parallel with the capacitor 76 of the integration circuit 74 and receives the integration voltage S3 of the battery voltage by the integration circuit 74. The signal S4 is output.

The driving circuit 56 includes two transistors 80
Reference numeral 82 denotes a Darlington-connected transistor switch, which is turned on in conjunction with the input of the control signal S4 from the timer circuit 54 to energize the light source 44.

The diode 84 connected in series with the light source 44 is for reducing the voltage, and the amount of current supplied to the light source 44 is set lower than the rated value of the light source 44 (for example, 9 V).
7V against the rated light bulb of, and the life is extended so that the bulb does not break even if the vibration peculiar to the electric tool continues to be applied at the time of lighting.

The changeover switch 62 is a slide type having three contacts in one circuit. The fixed contact 86 is connected to the negative pole of the battery 24, while the first contact 88 is connected to the input terminal of the drive circuit 56.
The second contact 90 is connected to the emitter end of the transistor 82,
The contacts 92 are connected to the collector terminals of the transistors 82, respectively. Therefore, when the switch contact is on the first contact 88 side, the input of the control signal S4 to the drive circuit 56 is forcibly stopped, and the power supply to the light source 44 is stopped. Second
When connected to the contact 90, the drive circuit 56 performs the above-described automatic control operation. When the drive circuit 56 is changed to the third contact 92, both ends of the light source 44 are forcibly connected to both ends of the battery 24, and the light source 44 is continuously energized. To emit light.

The operation of the above electronic circuit 27 will now be described with reference to FIG.
This is shown more specifically based on the explanatory diagram shown in FIG. Here, (a) shows the type of selection mode in the changeover switch 62, (b) shows the drive timing signal S1 generated at both ends of the detection resistor 68, (c) shows the detection signal S2, and (d) shows the integration circuit. The charging voltage S3 of the capacitor 76 at 74 is
(E) shows the control signal S4, and (f) shows the power supply timing to the light source 44.

Here, during the period when the changeover switch 62 is in the off mode (time t0 to t1), the power supply to the above-described circuits is stopped, and the drive circuit 56 does not supply power to the light source 44.

Next, in conjunction with the switching of the changeover switch 62 to the automatic control mode at time t1, the circuit becomes operable by being energized, and the capacitor 76 is charged with a predetermined time constant. , Set time Δ until time t2 when the voltage value exceeds second reference voltage V2
The control signal S4 is output from the timer circuit 54 for t. The drive circuit 56 energizes the light source 44 in conjunction with the input of the control signal S4 so that the light emission state test and the light irradiation position adjustment operation can be performed immediately after the use of the illumination unit 30 is started. Moreover, since the light is emitted only by switching the changeover switch 62 without turning on the main switch 22, the remaining capacity of the battery 24 can be confirmed in this light emitting state.

At time t3, the main switch 22
Is turned on, the charging voltage S3 of the capacitor 76 is rapidly discharged, and the control signal S4 is sent from the timer circuit 54 to the driving circuit 56. As a result, the light source 44 is energized again to perform a necessary lighting operation. The energization state of the light source 44 is maintained for Δt after the main switch 22 is turned off at time t4, and then automatically turned off.

On the other hand, when the changeover switch 62 is set to the ON mode at time t6, the power supply to the above-described circuit is cut off, and the light source 44 is turned off without passing through the drive circuit 56.
4 is directly connected to the main switch 22.
Irrespective of the ON / OFF operation of the light source 44, the stationary ON operation of the light source 44 is performed.

The light amount control circuit 58 is provided with a timer circuit 5
4, a light receiving element 9 such as CdS between the output terminal and the ground terminal.
4, the amount of light applied to the light receiving element 94 increases in accordance with the usage environment of the power tool, and when the amount of light exceeding the set value is detected, the control signal S to the drive circuit 56 is output.
3 is stopped, and the light emission of the light source 44 can be forcibly stopped.

FIG. 5 shows another embodiment of the electronic circuit 27, in which the first contact 88 of the changeover switch 62 is connected to the input side of the drive circuit 56, while the second contact 90 is released.
Further, the third contact 92 is connected to the collector end of the switching transistor 78 in the timer circuit 54. With this configuration, in the off mode connected to the first contact 88, the input side of the drive circuit 56 is turned off and the driving state is forcibly stopped. However, by switching to the second contact 90, the stopped state is changed. When the mode is released and the control mode is switched to the third control point 92, the detection signal S is output.
The same state as when the switching transistor 78 is turned on by the input of 2 is established, and the light source 44 is always turned on regardless of whether the main switch 22 is turned on or off. In any of the above operation modes, the current flowing through the switch contact is small, and the changeover switch 62 having a small current capacity can be used.

Further, by providing a fuse 96 having a small resistance in place of the diode 84 connected in series with the light source 44, the upper limit of the current flowing through the light source 44 is regulated, while the light source 44 is short-circuited and becomes excessively large. When a large current flows, the current is blown, and the current flowing through the transistor 82 is cut off to protect the transistor 82 from overcurrent.

Further, the light quantity control circuit 58 uses a phototransistor 94a instead of the CdS 94. However, the present invention is not limited to this. If the resistance value automatically changes by detecting the magnitude of the light irradiation quantity, It can be carried out with appropriate changes. Further, in the above-described embodiment, the light emission of the light source 44 is stopped when the incident light amount exceeds the set value. However, it is also possible to control the irradiation light amount by the light source 44 according to the change of the incident light amount. is there.

Further, instead of switching the light source 44 from the off mode to the automatic control mode by the changeover switch 62, the operation is performed in conjunction with the operation of shifting the arm 34 and the light emitting body 38 of the illumination unit 30 to the irradiation position. Thus, the above-mentioned switch switching may be automatically performed. Battery 2
4 can use a secondary battery in addition to the primary battery. In this case,
A charging circuit may be further provided inside or outside the main body case 28. If the resistor 75 of the integration circuit 74 is a variable resistor, the value of the set time Δt in the timer circuit 54 can be made variable.

FIGS. 6 and 7 show still another embodiment, in which a battery pack 26 includes a functional circuit section 100 composed of a plurality of functional circuits, and a function to be executed is interlocked with an operation of a main switch 22. It is one that can be switched. In this embodiment, the electronic circuit 2
7 includes first and second circuits 102 and 104 for realizing a function of changing a set time Δt for regulating the energization time to the light source 44;
The third circuit 108 for driving the capacity indicator 106 having the function of displaying the remaining capacity of the battery 24 has been illustrated. However, the present invention is not limited thereto, and the battery pack 26 itself or the battery pack 26 may be used.
It is needless to say that the present invention can be applied to various functions that the small electric equipment to which the above-mentioned is applied supplementarily needs. Further, since the parts other than those specially described below are substantially the same as those in the above-described embodiment, the detailed description thereof is omitted by attaching the same or similar numbers.

The present embodiment is characterized in that a count circuit 98 is interposed between the detection circuit 52 and the timer circuit 54 in each of the above embodiments. The count circuit 98 includes one input terminal 110 and a plurality of output terminals 112, and outputs a signal S22 to S2n corresponding to the number of pulses S2 input to the input terminal 110.
2 is sequentially changed, and the output state of the signal S2n returns to the initial state simultaneously with the input of the reset signal S5 to the reset terminal 114.

Further, the first to third circuits 102, 104, 10
8 has an input signal regulating circuit 116 on its input side as shown in FIG. 7 so that even if the duration of the input signals S21 to S23 is long, it is limited to a predetermined value. Only necessary functions are activated.

The above-described regulation circuit 116 is an AND circuit 1
While connecting the integrating circuit 120 to one input terminal of the
A signal is applied to the other input terminal via the inverter 122. After the input signal S2n changes from the "H" level to the "L" level, the integration circuit 120 discharges with a predetermined time constant to "L". The output of the AND circuit 118 rises to the “H” level only during the period until it falls to the “H” level, turns on the transistor 78 and rapidly discharges the capacitor 76 of the timer circuit 54.

Here, the first circuit 102 is directly driven by the signal S21 obtained by inverting the detection signal S2 output from the detection circuit 52. After the input of the detection signal S2 is completed, the first circuit 102 The light source 44 for the set time Δt1
Turns on when energized.

In the second circuit 104, a set time Δt2 which is sufficiently longer than that in the first circuit 102 is set.
Here, if the main switch 22 is turned on once and the first circuit 102 is driven and then left as it is, the transistor 82 of the drive circuit 56 is turned off after the lapse of the set time Δt1, and is directed to the count circuit 98. Thus, a reset signal S5 is sent, and the count circuit 98 is returned to the initial state.

On the other hand, when the main switch 22 is turned on once again after the operation of the first circuit 102, the signal S22 is input to the second circuit 104 from the count circuit 98. At this time, the output side of the second circuit 104 is connected to the first circuit 10
The second drive circuit 56 is connected in parallel with the transistor 80, and the set time Δt in the first circuit 102
Regardless of 1, the second circuit 104 side is enabled, and the light source 44 is turned on for a set time Δt2 and then turned off.

Further, the main switch 22 is continuously
When the turn-on operation is performed, the count circuit 98 outputs the third circuit 10.
As a result of the input of the signal S23 to the switch 8, the display operation is performed by energizing the capacitance display 106 for the set time Δt3 in the timer circuit 54, and then the display operation of the capacitance display 106 is automatically stopped.

In the above embodiment, as the number of times the main switch 22 is turned on increases, the count circuit 9
The example in which the terminal 112 from which the signal S2n is output from 8 shifts is described. However, the present invention is not limited to this. For example, the number of pulses of the detection signal S2 input within a short time of about 2 seconds is counted.
The relationship between the number of times the main switch 22 is operated and the function to be selectively executed is as follows. For example, by outputting a signal only to the output terminal corresponding to the count number, only one specific function can be selected. Needless to say, the present invention can be implemented with appropriate changes.

In place of using the electronic circuit 27 using specific circuit components, the whole or a main part thereof can be executed by a microcomputer program or other functional components. For example, the timer means described above can be changed in such a manner that the pulse of the reference oscillation circuit is counted by a counter or the count is managed by a microcomputer.

Further, in each of the above-described embodiments, an example has been described in which the operation is started in conjunction with the operation of the main switch 22 and then turned off after a set time by the timer means.
The main switch 22 may be stopped at the same time as turning off, or may be manually turned off by a switch or a changeover switch 62 provided separately on the battery pack 26.

[0046]

According to the present invention, as described above, the electronic circuit 27 provided on the battery pack 26 is executed in conjunction with the ON operation of the main switch 22 provided on the device main body 10 side. No special operation is required to execute step 27, and the operability is excellent.

Further, by configuring the electronic circuit 27 to continue the execution for the set time Δt even after the main switch 22 is stopped, the electronic circuit 27 is required even when the operation time of the device body 10 is short. The operation state can be maintained for a short time.

Further, by making it possible to select a function in the electronic circuit that is executed in conjunction with the number of times the main switch 22 is turned on, the function of assisting the driving of the device body 10 can be easily performed even while the device body 10 is being driven. And you can choose exactly. Furthermore, by providing the battery pack 26 with the changeover switch 62 for changing the operation mode, the battery pack 26 can be used alone.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which the present invention is applied to a power tool, and shows a state in which a lighting unit is housed in a main body case.

FIG. 2 is a perspective view illustrating a use state of a lighting unit.

FIG. 3 is a circuit diagram showing a specific configuration of an electronic circuit.

FIG. 4 is an explanatory diagram showing an operation state of the electronic circuit shown in FIG.

FIG. 5 is a circuit diagram showing another embodiment of the electronic circuit.

FIG. 6 is a circuit diagram showing still another embodiment of the electronic circuit.

7 is an electric circuit diagram showing a specific configuration of a functional circuit unit in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Device main body 16 Handle 20 Motor 22 Main switch 24 Battery 26 Battery pack 28 Main case 30 Illumination part 44 Light source 52 Detection circuit 54 Timer circuit 56 Drive circuit 58 Light quantity control circuit 62 Switching switch

Claims (11)

[Claims] 1. A small electric device comprising a predetermined device main body, a main switch on the device main body for restricting an operation timing on and off, and a battery pack detachably attached to the device main body. The battery pack includes a battery capable of supplying power to the device main body in conjunction with the ON operation of the main switch, and an electronic circuit having a predetermined function, and interlocks with the ON / OFF operation of the main switch on the device main body side. A small electric device characterized in that the drive time of an electronic circuit provided on the battery pack side can be regulated. 2. The small electric device according to claim 1, wherein in the regulation operation of the electronic circuit by the main switch, the drive of the function of the electronic circuit is started substantially simultaneously with the ON operation of the main switch. 3. The small electric device according to claim 2, wherein the regulation operation of the electronic circuit by the main switch is stopped by a delay of a set time Δt from an operation of turning off the main switch. 4. The electronic circuit according to claim 1, wherein the electronic circuit performs a plurality of functions, counts the number of times the main switch is turned on, and selects a function to be driven according to the count.
4. The small electric device according to any one of claims 3 to 3. 5. A small electrical device having a predetermined device main body and a main switch on the device main body for regulating the operation timing on and off, which is detachably attached to the small electric device, and interlocked with the ON operation of the main switch. A battery pack capable of supplying power to a device main body from a built-in battery, further comprising an electronic circuit having a predetermined function, and interlocking with an on / off operation of a main switch on the device main body side, and controlling a drive timing of the electronic circuit. A battery pack for small electric equipment, which can be regulated. 6. The above-described regulation operation of the electronic circuit by the main switch starts the drive of the function of the electronic circuit substantially simultaneously with the ON operation of the main switch, while delaying the function by the set time Δt from the OFF operation of the main switch. The battery pack according to claim 5, wherein driving is stopped. 7. The electronic circuit according to claim 1, wherein the electronic circuit performs a plurality of functions, counts the number of times the main switch is turned on, and selects a function to be driven according to the count.
Or the battery pack according to 6. 8. The device main body is an electric tool, and an electronic circuit provided in the battery pack is capable of irradiating a workpiece to be machined by the electric tool. The selected function is the set time Δ after the main switch is turned off.
The battery pack according to claim 7, which has a length of t. 9. The small electric device according to claim 7, wherein the function selected in conjunction with the number of times the main switch is turned on includes a function of displaying a current capacity of the battery. 10. The electronic device according to claim 1, wherein the main body is a power tool, and the electronic circuit is configured to illuminate a workpiece to be machined by the power tool. The automatic control operates in conjunction with the operation of the main switch. 6. The battery pack according to claim 5, further comprising: a changeover switch that can select between a mode in which the light is always turned off and a mode in which the light is always turned on in addition to the mode. 11. The operation in the automatic control mode is performed by simultaneously detecting the current supplied from the built-in battery to the main body of the device in response to turning on of the main switch. 11. A detecting means, wherein the light irradiation intensity can be controlled in accordance with a value detected by the detecting means.
The battery pack as described.