JPS5841841Y2 - Power supply for hair iron - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power supply device for a hair iron used for curling hair such as Negro hair and bob hair.

In recent years, in the barber and beauty industry, fashionable hair styles such as Negro hair and bob hair have become popular as hair styles have become fashionable. Hair curling is performed by a hair curling technique using a hair iron that combines a star-shaped hair curling heating rod with a small diameter (3 to 12 φ) and hair scissors.

In addition, the thickness of the hair curling heating rod of hair irons used for curling hair varies depending on the hair style, from a minimum of 3 mm to a maximum of 20 mm. The rating of the heater embedded therein and the rated voltage supplied to it also vary depending on the thickness of the heating rod.

Conventionally, in the power supply device for heating hair irons of different diameters as described above, a step-down transformer is used to step down the 100V commercial power supply to a voltage of about 8V, and this voltage is used to heat the hair iron using a slider. A method is used to adjust the heating temperature to match the thickness of the rod and hair style (appropriate temperature of 220 to 240 degrees Celsius), but it is difficult to set the voltage to match curling irons of different thicknesses when adjusting the Slide Duck. In addition to being difficult to stabilize the appropriate temperature,
If you leave the hair iron unattended with the set voltage supplied, the temperature will reach an abnormally high temperature (40
0°C) and burn the hair when used again, so you have to be very careful when handling it when curling, and you have to alternately use two types of hair irons with different thicknesses. When performing curling, it is necessary to connect and replace the hair iron to the power supply each time, which makes the work complicated and reduces work efficiency.

This idea was created in view of the above points, and is configured so that multiple hair irons can be connected to a single power supply, and any one hair iron can be brought into the main heating state by switching the selection switch. , and others in the preheating state, and the voltage supplied to the hair iron in the main heating state is a cyclically changing two-step high and low voltage, and the supply time width of each voltage is controlled by a timer circuit. To provide a power supply device for a hair iron that can stably maintain the optimum temperature required for the hair iron by controlling the temperature.

An embodiment of this invention will be described below with reference to the drawings.

Figure 1 shows an example of a circuit that enables main heating and preliminary heating control of two hair irons of different thickness.The primary winding 1a of the step-down power transformer 1 is connected to a 100 V commercial power supply. , on the secondary side there is a first secondary winding 1b for taking out the heating voltage of the hair iron, and a second secondary winding 1b for controlling the power supply.
A secondary winding 1C is provided, and the first secondary winding 1b has a tap t1 for taking out a preheating voltage (2■) of the hair iron, and a two-step high and low voltage for main heating (2). 4V
and 7V) tap t2. t3 are provided respectively.

2a1 and 2a2 are terminals for connecting one hair iron 3a, and 2b1 and 2b2 are terminals for connecting the other hair iron 3.
This is a terminal for connecting terminals 2a and 2b.
, are commonly connected to the Ov end of the first secondary winding 1b.

Reference numeral 4 denotes a selection switch for switching the hair iron 3a or 3b between a main heating state and a preheating state, and this selection switch 4 is a two-circuit switch having a pair of contact pieces 4a and 4b electrically separated from each other. One of the common terminals CO1 is connected to the preheating tap t1 of the secondary winding 1b, and the other common terminal CO1 is connected to the preheating tap t1 of the secondary winding 1b.
2 is a main heating tap t2.2 of the secondary winding 1b via a transfer contact ry of a relay Ry, which will be described later. t3, one of the hair iron connection terminals 2a2 is connected to one contact terminal a1 on the contact piece 4a side, and the other hair iron connection terminal 2a2 is connected to one contact terminal b1 on the contact piece 4b side. The iron connection terminal 2b2 is connected.

In addition, the other contact terminal a2 on the contact piece 4a side and the contact piece 4b
The other contact terminal b2 on the side of the contact piece 4b and one contact terminal 81 on the side of the contact piece 4a are connected, respectively.

Both ends of the second secondary winding 1c of the power transformer 1 are connected to the input side of a full-wave rectifier 5 consisting of a diode D, and a smoothing capacitor C1 is connected to the output side of the full-wave rectifier 5. The relay Ry is connected in parallel to the smoothing capacitor C1 via the drive transistor Q1, and the Zener diode ZD for constant voltage is also connected in parallel to the smoothing capacitor C1. .

Dl is a freewheeling diode connected in parallel to the relay Ry.

Reference numeral 6 denotes a timer circuit which arbitrarily controls the energization and deenergization time of the relay Ry, and is composed of an astable multivibrator.

That is, a pair of transistors Q2, whose emitters and collectors are connected in parallel between both ends of two Zener diodes ZD. Q3, each transistor Q2 . A diode D2.Q3 is connected to the emitter to prevent the transistor from being destroyed when a large reverse voltage is applied between the base and emitter. D3 are each connected in series, and further, resistors R2 and R3 are each connected in series to their collectors.

Further, the base of transistor Q2 is connected to the collector of transistor Q3 via capacitor C3.
The base of 3 is connected to transistor Q2 via capacitor C2.
are connected to their respective collectors.

One end of a resistor R4 is connected to the connection point between the capacitor C2 and the base of the transistor Q3, and the other end is connected to one end of a variable resistor VR that adjusts the repetition period. One end of the resistor R5 is connected to the connection point with the base, and the other end is connected to the other end of the variable resistor VR.
A slider S of the variable resistor VR is connected to the positive electrode side of the full-wave rectifier 5.

The repetition synchronization T of the timer circuit 6 is set by capacitors C2, C3, resistors R4, R5, R6, and variable resistor VR.

7 is a control circuit for the relay drive transistor Q1 operated by the output signal from the timer circuit 6;
This control circuit 7 includes a transistor Q whose emitter and collector are connected in parallel to both ends of the Zener diode ZD.
4, the base of this transistor Q4 is connected via a resistor R7 to the output terminal of the timer circuit 6, that is, the connection point A between the collector of the transistor Q3 and the resistor R3, and a resistor R8 is connected to the collector of the transistor Q4. In addition to being connected in series, the base of the drive I transistor Q1 is connected to the connection point between this resistor R8 and the collector via a resistor R9, and this transistor Q
1 and the positive electrode of the full-wave rectifier 5 is a base resistor RI.
O is connected.

Further, L is an indicator lamp that indicates whether or not the hair iron is energized.

FIG. 2 shows a front view of a case body incorporating the circuit device having the above-mentioned configuration, and the front panel 11 of the case body 10 has a dial 12 for operating the slider S of the variable resistor VR.
A display section 13 indicating the thickness of the hair iron 3 is formed on the front panel 11 facing the outer periphery of the dial 12. By aligning the dial 12 with the scale zone of the display section 13, the thickness of the hair iron 3 can be adjusted. It is designed to set the supply time of each high and low voltage required for optimal heating of the hair iron.

In addition, the front panel 11 includes a power switch 14, hair irons 3a, 3b connection terminals 2a12a2, 2
b12 b2, an indicator lamp L, and a selection switch 4 are attached.

Next, the operation of this device constructed as described above will be explained.

For example, a hair iron 3a with a thickness of 3mm and a hair iron 3a with a thickness of 1Qmm.
When curling hair using both the 3mm hair iron 3b and the 3mm hair iron 3a, first
Connect the 10mm hair iron 3 to the terminals 2a1 and 2a2.
b to the terminals 2 b, , 2 b, , respectively, and the hair iron used for curling the hair first;
For example, operate the selection switch 4 so that the hair iron 3b of 1Qmm is fully heated, and press the contact pieces 4a, 4.
b to the state shown by the solid line in FIG.

As a result, the 3mm hair iron 3a is connected to the preheating tap t1 of the power transformer 1, and the 10mm hair iron 3b is connected to the main heating tap t2. It will be connected to t3.

Then, dial 1 so that the supply time period of high and low voltage required for main heating of the 10 mm hair iron 3b can be obtained.
Align the arrow 12 a of No. 2 with the 10 mm scale zone of the display section 13.

As a result, in the timer circuit 6, for example, the ON time of the I transistor Q3 is 4.0 seconds (the ON time of the transistor Q2 is 4.0 seconds).
FF time), OFF time is 3.0 seconds (transistor Q2
The resistance values of the variable resistors VR are distributed to the capacitors C2 and C3 so that the ON time of the timer circuit is ON, and the oscillation repetition period of the timer circuit is set.

When the power switch 14 is closed in this state, the 3mm hair iron 3a is preheated to 60 to 100°C with a voltage of 2 cm, and at the same time, the relay Ry is controlled by the operation of the timer circuit 6, and the hair iron 3b is heated. Although power control is performed, if the transistor Q3 of the timer circuit 6 goes from OFF to 0N (and transistor Q2 goes 0FF) at the moment the power switch 14 is turned on, then the transistor Q
With the conduction of 3, the slider S-variable resistor VR-resistance R5-
A current flows through the path of the capacitor C3, and the capacitor C3 begins to be charged according to the time constant (4.0 seconds) of the resistor Rs and the variable resistor VR.

At this time, since the transistor Q3 is ON, its collector voltage is maintained at approximately the ground potential, and the transistor Q4 of the control circuit 7 is turned OFF.

Therefore, the transistor Q1 connected through the resistor R9
is OFF L, the relay Ry is deenergized, and its transfer contact ry is connected to the 7-tap t3 of the secondary winding 1b of the power transformer 1, and a voltage of 7V is supplied to the hair iron 3b.

Then, the charging voltage of capacitor C3 is the same as that of transistor Q2.
When the base-emitter voltage reaches (4.0 seconds elapsed), transistor Q2 turns from OFF to ON, and at the same time transistor Q3 turns OFF, so transistor Q4 turns OFF.
It becomes N.

When the transistor Q4 is turned on, the transistor Q1 is turned on, energizing the relay Ry, and switchingly connecting the transfer contact ry to the 4V tap t2 of the secondary winding 1b of the power transformer 1, changing the voltage to 7V. Then, a voltage of 4■ is supplied to the hair iron 3b.

Further, when the transistor Q2 is turned on, a current flows through the capacitor C2 through the path of the slider S, the resistor R4, and the capacitor C2, and the capacitor C2 is charged according to the time constant (3.0 seconds) with the resistor R4.

Then, the charging voltage of capacitor C2 is
When the base-emitter voltage of 3 is reached (3.0 seconds elapsed)
, transistor Q3 changes from OFF to ON, transistor Q2 changes from ON to OFF, and accordingly, relay Ry
is de-energized again and starts supplying a voltage of 7cm to the hair iron 3b.

Thereafter, in the same manner, the timer circuit 6 operates at the repetition period T (every 4.0 seconds and 3.0 seconds) set by the capacitors C2 and C3, the resistors R4 and R5, and the variable resistor VR, thereby turning on the relay RV. , OFF control and apply low level voltage of 3.0 from power transformer 1 to 4 to hair iron 3b.
A high level voltage of 7 cm is cyclically supplied for 4.0 seconds each to stably heat the hair iron 3b to the optimum temperature (220 to 240°C).

In addition, when using a preheated 3mm hair iron 3a for curling hair instead of the 1Qmm hair iron 3b, the selection switch 4 can be moved to its contact piece 4.
Operate the hair iron 3a so that a, 4b are in the state shown by the broken line in FIG. t3 side, and connect the hair iron 3b to the preheating side tap t1.

Then, the dial 12 is adjusted to the 10 mm scale zone on the display section 13 so that the supply time range of high and low voltages necessary for main heating of the 3 mm hair iron 3a is obtained.

As a result, in the timer circuit 6, for example, the ON time of the transistor Q3 is 6.5 seconds (the ON time of the transistor Q2 is 6.5 seconds).
11 hours), 011 hours is 0.5 seconds (transistor Q2
capacitors C2 and C3 so that the ON time of
The oscillation repetition period of the timer circuit to which the resistance value of the variable resistor VR is assigned is set.

At this time, the slider S is located at the sliding end on the resistor R4 side.

Therefore, in the above repetition period, ``relay Ry is turned on and off.''
By controlling F, the hair iron 3a is cyclically supplied with the low level voltage of power transformers 1 to 4■ for 6.5 seconds and the high level voltage of 7■ for 0.5 seconds each, and the hair iron 3a is heated to the optimum temperature ( 220 to 240°C).

Also, the thickness dimension of hair irons 3a and 3b is 6
mm, 7mm, etc., simply adjust the dial 12 to the scale zone on the display section 13 that corresponds to the iron size, and the two high and low levels of 4V and 7V that match the iron size will be displayed. Voltage is cyclically supplied by the timer circuit 6 at predetermined time intervals to heat the hair iron.

Table CI'l shows an example of the voltage supply time in two stages of heights 4■ and 7■ for the thickness of each hair iron.

It should be noted that the timer circuit 6 in this invention is not limited to the astable multivibrator, and other systems may also be used.
The voltage switching system in stages is not limited to relays, and can be similarly performed using thyristors or other elements.

Further, if a slide switch for two or more circuits is used as the selection switch 4, it is possible to control two or more hair irons in the same way.

In addition, the temperature of the hair iron in the preheated state is 60 to 1
Since it is maintained at 00°C, it can be fully used for low-temperature finishing of hair curling.

As described above, according to the power supply device for a hair iron of this invention, a plurality of hair irons can be connected to a single power supply device, and any one hair iron can be activated by switching the selection switch. Since it is now possible to select and control the heating state and the preheating state, even if you are curling hair by alternately using two or more types of hair irons with different thicknesses, you can easily control the hair iron you need by simply operating a switch. can be easily set for curling use, and curling work efficiency can also be improved.

In addition, the voltage supplied to the hair iron in the main heating state is a cyclically changing high and low voltage, and the supply time width of each voltage can be arbitrarily controlled by a timer circuit, so it can be used for any thickness. Even hair irons can stably maintain the optimum temperature (220 to 240 degrees Celsius) necessary for hair curling, and there is no risk of the temperature rising too high or falling too low as with conventional methods. There is no need to pay attention, and safety can be ensured during curling work.

In addition, the supply time width of the two high and low voltages that are cyclically supplied to the hair iron can be set arbitrarily using a timer circuit, so one power supply can be used for hair irons of various sizes. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an example of a power supply device for a hair iron according to this invention, and FIG. 2 is a front view of a case body incorporating the power supply device according to this invention. 1...Power transformer, 3a, 3b...
...hair iron, 4...selection switch,
5... Controller, 6... Song timer circuit, 7...
...control circuit, RV...relay, ry...
...Transfer contact, 10...Case body,
12...Dial, 13...Display section.

Claims (3)

[Scope of utility model registration request] (1) A power transformer that takes out the high-level and low-level voltages required for the main heating of the hair iron and the voltages necessary for the preheating of the hair iron, the high-level and low-level voltage systems for the main heating of this power transformer, and the spares. a selection switch provided in a power supply system for a plurality of hair irons connected in parallel to the heating voltage system, for switching and connecting any one of the hair irons to the main heating voltage system and the others to the preheating voltage system; A switching means is provided between the selection switch and the high-level and low-level voltage systems of the power transformer to selectively supply high- and low-level voltages to the hair iron, and a switching means for supplying the high-level and low-level voltages to the hair iron. A power supply for a hair iron comprising a timer circuit to be set, and a control section operated by a time signal of the timer circuit to control switching of the switching means to a high level voltage system and a low level voltage system according to a time width set by the timer circuit. Device. (2) The power supply device for a hair iron according to claim 1, wherein the timer circuit comprises an astable multivibrator with a variable repetition period. (3) The power supply device for a hair iron according to claim 1, wherein the switching means for selectively supplying high and low level voltage to the hair iron is a relay.