JPH0736397U - flashlight - Google Patents

Abstract

(57) [Summary] [Purpose] In a flashlight, it is possible to extend the life of the dry battery by adjusting the current supply from the dry battery to the light bulb, and to adjust the amount of illumination light. [Structure] A pulse oscillation circuit 5 for generating a square wave pulse and arbitrarily changing the pulse width is inserted between a switch 2 for turning on and off a current flow from a dry cell 1 and a light bulb 3, and the switch described above. The pulse width of the pulse oscillating circuit 5 when 2 is turned on and energized is adjusted so that the current supply from the dry cell 1 to the light bulb 3 is adjusted. As a result, the power consumption can be reduced, the life of the dry battery can be extended, and the amount of illumination light can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flashlight that is used as a portable power source using a dry battery, and particularly to a flashlight that can adjust the current supply from the dry battery to the bulb to extend the life of the dry battery and adjust the illumination light intensity. .

[0002]

[Prior art]

 As shown in FIG. 4, a conventional flashlight of this type includes a dry battery 1 for generating a DC voltage, a switch 2 for turning on / off a current flow from the dry battery 1, and a switch 2 for connecting the switch 2 through the switch 2. It was made up of a light bulb 3 that is lit by being supplied with an electric current from the dry cell 1. In FIG. 4, reference numeral 4 denotes a parabolic reflector that is arranged behind the light bulb 3 and reflects the light of the light bulb 3 located near the focal point forward. Further, the dry battery 1 is configured such that, for example, two or four batteries having a generated voltage of 1.5 V are connected in series to generate a DC voltage of 3 V or 6 V. Then, the switch 2 is turned on to supply a constant current from the dry battery 1 to the light bulb 3 to light it, and the switch 2 is turned off to cut off the current and turn off the light.

[0003]

[Problems to be solved by the device]

However, in such a conventional flashlight, the switch 2 only turns on and off the supply of a constant current from the dry cell 1 to the light bulb 3, and as shown in FIG. 5, at time t ₁ . Until the switch 2 was turned on and turned off at the time t ₂ , 100% of electric power was continuously supplied. In this case, the amount of illumination light by lighting the light bulb 3 was always 100%. Therefore, it consumes a large amount of electricity and consumes 100% of the light even when the amount of illumination light of 100% is not needed depending on the usage conditions. there were. For this reason, it may not be possible to use it for a long time in an emergency such as a disaster or a disaster. Moreover, since the amount of illumination light by lighting the light bulb 3 is always 100%, the brightness of the illumination cannot be arbitrarily changed depending on the situation.

Therefore, the present invention addresses such a problem and provides a flashlight capable of adjusting the current supply from the dry battery to the light bulb to extend the life of the dry battery and adjusting the illumination light amount. The purpose is to

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the flashlight according to the present invention uses a dry battery that generates a DC voltage, a switch that turns on and off the flow of current from the dry battery, and a current that flows from the dry battery through the switch. In a flashlight including a light bulb that is supplied and lit, a pulse oscillation circuit that generates a square wave pulse and can arbitrarily change the pulse width is inserted between the switch and the light bulb. This is to adjust the current supply from the dry cell to the bulb by changing the pulse width of the pulse oscillation circuit when the power is turned on and the power is turned on.

The pulse oscillation circuit is connected to a free-running multi-vibrator in which an RC-coupled two-stage amplifier circuit is anti-coupled, and is connected to a part of the input part of the free-running multi-vibrator to interlock with turning on of the switch. And a switching element that is connected to the output part of the self-propelled multivibrator and that turns on and off the current supplied to the light bulb in response to an energizing pulse.

[0007]

[Action]

 The flashlight configured in this way generates a square wave pulse with a pulse oscillation circuit inserted between the switch that turns on and off the flow of current from the dry cell and the light bulb, and at the same time changes its pulse width arbitrarily. As a result, the pulse width of the pulse oscillating circuit when the switch is turned on and energized is changed, and the current supply from the dry cell to the light bulb is adjusted. As a result, the life of the dry battery can be extended and the amount of illumination light can be adjusted.

[0008]

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a flashlight according to the present invention. This flashlight has an adjustable current supply from a power source to a light bulb. As shown in FIG. 1, it has a dry cell 1, a switch 2 and a light bulb 3, and a pulse oscillation circuit 5 is further inserted. Consists of.

The dry battery 1 serves as a power source for generating a DC voltage, and is composed of, for example, two or four batteries each having a generated voltage of 1.5 V connected in series. The switch 2 turns on and off a current flowing from the dry battery 1 to a light bulb 3 described later, and is operated, for example, in a linear slide type or a rotary type. The light bulb 3 is lit by being supplied with current from the dry cell 1 via the switch 2 and is made of, for example, a miniature ball having a rated current of 0.3A. In FIG. 1, reference numeral 4 denotes a parabolic reflector that is arranged behind the light bulb 3 and that reflects the light of the light bulb 3 located near the focal point forward.

Here, in the present invention, the pulse oscillation circuit 5 is inserted between the switch 2 and the light bulb 3. This pulse oscillating circuit 5 is capable of generating a square wave pulse and changing its pulse width arbitrarily. Its internal configuration is, for example, as shown in FIG. 2, a self-propelled multivibrator 6, a variable resistor VR, And transistor Q ₃ . The self multivibrator 6 is for generating a square wave pulse, between the first and second transistors Q _1, Q ₂ 'base and the collector, the first and second capacitors C _1, C ₂ And four fixed resistors R ₁ , R ₂ , R ₃ and R ₄ are connected to each other to form an RC-coupled two-stage amplifier circuit which is anti-coupled. The values of the above circuit elements are, for example, C ₁ = 0.01 μF, C ₂ = 0.022 μF, R ₁ = 1 KΩ, R ₂ = 750 Ω, R ₃ = 20 KΩ, R ₄ = 1 KΩ.

The variable resistor VR is used to arbitrarily change the pulse width of the square wave pulse generated by the self-propelled multivibrator 6, and a part of the input section of the self-propelled multivibrator 6 is provided. For example, it is connected to the second fixed resistor R ₂ and operates in conjunction with the on of the switch 2. That is, as described above, it is mechanically coupled to the switch 2 which is turned on and off by operating in a linear slide type or a rotary type, and its resistance value is changed by operating the knob after the switch 2 is turned on. It is possible to change from zero to a maximum of 10 KΩ.

Further, the third transistor Q ₃ serves as a switching element for turning on / off the current supplied to the light bulb 3 in response to the square wave pulse (energization pulse) output from the free-running multivibrator 6. Then, it is connected to the collector of the second transistor Q ₂ which is the output part of the self-propelled multivibrator 6. The fifth fixed resistor R ₅ connected in front of the third transistor Q ₃ is a resistor for limiting the base current of the transistor Q ₃ and has a resistance value of 100Ω, for example. The pulse oscillating circuit 5 configured in this way adjusts the current supply from the dry cell 1 to the light bulb 3 by arbitrarily changing the output pulse width when the switch 2 is turned on and energized. .

Next, the operation of the flashlight thus configured will be described with reference to FIG. First, in FIG. 2, when the knob of the switch 2 is operated to turn it on, a current I is supplied from the dry cell 1 to activate the free-running multivibrator 6 in the pulse oscillation circuit 5. At this time, the variable resistor VR also operates in conjunction with the ON operation of the switch 2, and immediately after the switch 2 is turned ON, its resistance value is at a minimum value of zero. In this case, the second transistor Q of the self-propelled multivibrator 6 is used.₂Square wave pulse P output from the collector of₁Occurs at a pulse interval of, for example, 70 μs, and its pulse width is, for example, 6 μs at the minimum, as shown in FIG. And this square wave pulse P₁Is the fifth fixed resistor R shown in FIG._FiveThrough the third transistor Q ₃ Input to this third transistor Q₃Is the square wave pulse P₁Turns on and off repeatedly at intervals of. As a result, the current I from the dry battery 1 is supplied to the light bulb 3 at the pulse interval and pulse width shown in FIG. In this state, the total current consumption supplied to the light bulb 3 is, for example, 10 mA or less, and the filament of the light bulb 3 is not heated and is turned off. That is, the illumination light amount of the light bulb 3 is 0%.

Next, when the knob of the switch 2 is operated to increase the resistance value of the variable resistor VR, a square wave output from the self-propelled multivibrator 6 is obtained as shown in FIG. 3B. The pulse width of the pulse P ₂ gradually widens, and if the maximum resistance of the variable resistor VR is 10 KΩ, the square wave pulse output from the free-running multi-vibrator 6 as shown in FIG. 3 (c). The maximum pulse width of P ₃ is about 70 μs. Then, this square wave pulse P ₃ enter into the third transistors Q ₃ via the fifth fixed resistor R ₅ of FIG. 2, the third transistor Q ₃ are of the square-wave pulse P ₃ Turns on and off repeatedly at intervals. As a result, the current I from the dry battery 1 is supplied to the light bulb 3 at the pulse interval and pulse width shown in FIG. In this state, the total current consumption supplied to the light bulb 3 is, for example, 0.33 A, and the light bulb 3 is lit and emits the maximum amount of light. In this case, since the rated current of the light bulb 3 is 0.3 A, the amount of illumination light of the light bulb 3 is 100% or more. Further, when the pulse width of the square wave pulse P ₂ shown in FIG. 3B is 35 μs, the current consumption is about 50% and the illumination light amount is about 50%.

In this way, the resistance value of the variable resistor VR is arbitrarily changed according to the use condition, so that the pulse oscillator circuit 5 can be operated as shown in FIGS. 3 (a) to 3 (c). The pulse width of the generated square wave pulses P ₁ , P ₂ , P ₃ can be arbitrarily changed, and the current supplied from the dry cell 1 to the light bulb 3 can be adjusted, and the illumination light amount can also be adjusted. be able to. The values of each circuit element in the circuit diagram shown in FIG. 2 are not limited to those described above, and may be changed appropriately. In particular, the pulse width of the square wave pulse can be appropriately changed by changing the constant values of the capacitors C ₁ and C ₂ and the fixed resistors R _{1 to} R ₄ of the self-propelled multivibrator 6. Further, although the external view of the flashlight of the present invention is not shown, the flashlight may be of a normal cylindrical type or a box type.

[0016]

[Effect of device]

 Since the present invention is configured as described above, the pulse oscillation circuit inserted between the switch for turning on and off the current flow from the dry cell and the light bulb generates a square wave pulse and the pulse width is arbitrary. By making the switch variable, the pulse width of the pulse oscillating circuit when the switch is turned on and energized can be changed to adjust the current supply from the dry cell to the battery. Therefore, it is possible to reduce the power consumption by adjusting the current supply according to the usage situation, and to reduce the waste by adjusting the necessary illumination light amount, thus reducing the consumption of the dry battery and extending its life. be able to. Therefore, it can be used for a long time in an emergency such as a disaster or a disaster. Further, since the amount of illumination light depending on the lighting of the light bulb can be arbitrarily changed, it is possible to appropriately change the brightness of the illumination according to the situation of use.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a flashlight according to the present invention.

FIG. 2 is a circuit diagram showing a circuit configuration of the flashlight.

FIG. 3 is a graph for explaining the operation of the flashlight.

FIG. 4 is a configuration diagram showing a conventional flashlight.

FIG. 5 is a graph for explaining the operation of the conventional flashlight.

[Explanation of symbols]

1 ... batteries 2 ... switch 3 ... bulb 4 ... parabolic reflector 5 ... pulse oscillation circuit 6 ... self multivibrator Q _1, Q _2, Q ₃ ... transistor C _1, C ₂ ... capacitors R _1, R _2, R ₃ , R ₄ , R ₅ ... Fixed resistance VR ... Variable resistors P ₁ , P ₂ , P ₃ ... Square wave pulse

Claims (2)

[Scope of utility model registration request] 1. A dry battery for generating a direct current voltage, a switch for turning on / off a current flow from the dry battery, and a light bulb which is supplied with current from the dry battery through the switch and is turned on. In the flashlight, between the switch and the bulb, insert a pulse oscillation circuit that generates a square wave pulse and can change the pulse width arbitrarily.
A flashlight, characterized in that a pulse width of a pulse oscillating circuit when the switch is turned on and energized is changed to adjust a current supply from a dry battery to a light bulb. 2. The pulse oscillating circuit is connected to a free-running multivibrator in which an RC-coupling two-stage amplifying circuit is anti-coupled, and is connected to a part of an input part of the free-running multivibrator, and is interlocked with turning on the switch. The pocket according to claim 1, comprising a variable resistor that operates and a switching element that is connected to the output part of the self-propelled multivibrator and that turns on and off the current supplied to the light bulb in response to a conduction pulse. Electric light.