JPH0632001Y2 - Hair dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hair dryer.

[Background technology]

In the conventional hair dryer, the air volume variable switch is "H",
It is constructed so that it can be switched to two positions of "L", and only "High" and "Low" are displayed corresponding to these two positions.

The conventional example has the following problems.

In other words, since there are only two types of air volume display, High ″ and Low ″, by replacing the attachment for the hair set, even if the air volume is adjusted over a larger number of hair set settings, the actual air volume state (hair set The setting status cannot be known.

The cause is that there is a difference between the state of the variable air volume switch and the actual air volume.

[Purpose of device]

An object of the present invention is to solve the problems of the conventional example and to provide a convenient hair dryer that displays a hair set setting state corresponding to an actual air volume.

[Disclosure of device]

The hair dryer of the present invention comprises wind speed varying means, wind speed detecting means, and display means for displaying hair set setting states corresponding to a plurality of types of wind speeds based on detection signals of the wind speed detecting means. .

According to the configuration of the present invention, the actual air volume in the usage state is detected as the wind speed, and the hair set setting state corresponding to the detected air volume is displayed, so that the wind speed does not need to be checked by actually touching the outlet with the hand. The set state can be easily known by the display means, and even if the wind speed changes due to the attachment of the attachment, the lighting state of the display means changes accordingly, so the actual wind speed can be known and the usability is improved. improves.

Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a circuit diagram of the hair dryer, FIG. 2 is an external view of the hair dryer, FIG. 3 is a sectional view, and FIG. 4 is a heater output characteristic diagram.

In FIG. 1, SW ₁ is a blower switch, SW ₂ is a heater switch, A is a motor speed variable circuit as wind speed varying means, B is a motor input voltage detecting circuit as wind speed detecting means, and C is a hair set setting state display. A display circuit as means and D is a heater circuit.

The configuration of the motor rotation speed variable circuit A is as follows.

A series circuit of a fuse F, a voltage dividing resistor H ₂ and a surge absorber Z is connected to the power plug SP via a blower switch SW ₁ . A full-wave rectifier D ₁ is connected across the surge absorber Z.

A series circuit including a parallel circuit of the motor M and the motor rotation unevenness prevention resistor R ₂ and a motor switching element (triac) TR ₁ is connected between both ends of the full-wave rectifier D ₁ .

A series circuit including the motor rotation unevenness prevention resistor R ₂ , the wind speed variable resistor VR, the wind speed variable protection resistor R ₁ and the time constant capacitor C ₁ is connected between both ends of the full wave rectifier D ₁ .

A motor trigger control element (SBS) S ₁ is connected between the gate of the motor switching element TR ₁ and the connection point of the wind speed variable protection resistor R ₁ and the time constant capacitor C ₁ . A ₁ is a time constant circuit.

The structure of the motor input voltage detection circuit B is as follows.

A series circuit of a current limiting resistor R ₃ , a Zener diode DZ ₁ and a transistor protection resistor R ₇ is connected between both terminals of the motor M, and an anode and a cathode of the Zener diode DZ ₁ are switching transistors T ₁ respectively.
The first voltage detection circuit B ₁ is configured by being connected to the base and collector of the.

The resistors R ₄ , R ₈ , the Zener diode DZ ₂ and the transistor T ₂ constitute a _second voltage detection circuit B ₂ similar to the first voltage detection circuit B ₁ .

The resistors R ₅ , R ₉ , the Zener diode DZ ₃ and the transistor T ₃ constitute a _third voltage detection circuit B ₃ similar to the first voltage detection circuit B ₁ .

The resistors R ₆ , R ₁₀ , the Zener diode DZ ₄ and the transistor T ₄ constitute a _fourth voltage detection circuit B ₄ similar to the first voltage detection circuit B ₁ .

Zener voltage of the zener diode _DZ 1 _{~DZ 4} in these first to fourth voltage detecting circuit _B 1 .about.B ₄ are different from each other.

The structure of the display circuit C is as follows.

The light emitting diode L is provided between the emitter of the transistor T ₁ and the negative terminal of the motor M in the first voltage detection circuit B ₁ .
D ₁ is connected and constitutes the first display portion C ₁ .

It is connected respectively emitting diodes _LD 2 to Ld ₄ between the negative terminal of the emitter and the motor M of each transistor _T 2 through T ₄ in the second to fourth voltage detecting circuit _B 2 .about.B _4, each second constitute the display unit _C 2 -C _4.

The structure of the heater circuit D is as follows.

A series circuit including a heater H ₁ , a heater switching element (triac) TR ₂ , a thermoswitch SF, and a fuse F is connected to a power plug S via a heater switch SW _2.
It is connected to P.

A phase angle setting resistor R ₁₃ and a phase angle setting capacitor C are provided between the anode and cathode of the heater switching element TR _2.
2 is connected in series circuit, resistor R ₁₃ and capacitor C ₂
The heater trigger control element S ₂ is connected between the connection point of 1 and the gate of the heater switching element TR ₂ .

A series circuit of the phase angle setting resistor R ₁₃ and the phase angle setting capacitor C ₂ constitutes a time constant circuit A ₂ .

The light emitting diodes LD _{1 to} LD ₄ are arranged on the side surface of the dryer body 1 as shown in FIG. 2, and corresponding to each of the “set”, “hard set”, “blow set” and “dry” sets. The status is displayed.

In FIG. 3, 2 is a blower fan directly connected to the motor M, 3 is a rectifying blade fixed to the inner surface of the dryer main body 1, 4
Is a filter attached to the suction port, 5 is a discharge port in front of the heater H ₁ , 6 is a circuit block, 7 is a handle, 8 is a rotary switch (blower switch SW ₁ , heater switch S
W ₂ ), 9 is a switch lever, 10 is a wind speed variable resistor VR
Is a rotation operation unit of.

Next, the operation will be described.

Capacitor time constant (i) the time at constant circuit _{A 1 C 1}
Voltage varies depending on the phase of the rectified voltage from the full-wave rectifier D ₁ . When the voltage reaches the on-voltage of the motor trigger control element S ₁ , the motor switching element TR
₁ , a trigger signal is output, the motor switching element TR ₁ is turned on, and the motor M is rotated.

(Ii) By adjusting the variable wind speed resistor VR, the phase in which the motor trigger control element S ₁ is conducted changes. Therefore, the voltage applied to the motor M also changes, and the rotation speed of the motor M is adjusted.

That is, when the voltage applied to the motor M is relatively low, the Zener diode D of the _first voltage detection circuit B ₁ is
Since only Z ₁ is conducting and its transistor T ₁ is on, the light emitting diode LD ₁ is lit and “SET” is displayed.

When the voltage applied to the motor M further increases and the rotation speed of the motor M, that is, the wind speed, increases, the second voltage detection circuit B ₂ also conducts, and the two light emitting diodes LD ₁ and LD ₂
Lights up and "Hard Set" is displayed.

When the rotation speed of the motor M further increases and the wind speed further increases, the third voltage detection circuit B ₃ also becomes conductive, the three light emitting diodes LD _{1 to} LD ₃ are turned on, and “BLOWSET” is displayed. .

When the voltage applied to the motor M becomes the highest, the wind speed also becomes the highest, the fourth voltage detection circuit B ₄ also becomes conductive, all the light emitting diodes LD _{1 to} LD ₄ are turned on, and “dry” is displayed.

(Iii) Therefore, even if the wind speed is not checked by touching the discharge port 5 with the hand, the light emitting diodes LD ₁ to
The set state can be easily known only by observing the lighting state of the LD ₄ .

Even when the wind speed changes due to the attachment of nozzles or the like, the light emitting diode L
The lighting state of D _{1 to} LD ₄ changes, and the actual wind speed at that time can be known.

(Iv) The voltage of the phase angle setting capacitor C ₂ of the time constant circuit A ₂ in the heater circuit D changes according to the phase of the AC power supply voltage. The voltage is the control element S ₂ for the heater trigger.
When the ON voltage of the heater is reached, the heater switching element T
A trigger signal is output to R ₂ , the heater switching element TR ₂ is turned on, and the heater H ₁ is energized.

(V) By changing the phase angle setting resistor R ₁₃ or by using a variable resistor, the phase at which the heater trigger control element S ₂ is conducted can be changed.

That is, as shown in FIG. 4, the phase angle setting resistor R ₁₃
Is fixed, the conduction phase angle θ of the heater trigger control element S ₂ is related to the fixed resistance value,
It is uniformly determined depending only on the characteristic of the phase angle setting capacitor C ₂ .

Also, the relationship between the conduction phase angle θ and the heater output P is uniformly determined. Therefore, the heater output P can be adjusted according to the resistance value of the phase angle setting resistor R ₁₃ .

If the resistance value of the phase angle setting resistor R ₁₃ is set to a sufficiently large value, it is only necessary to replace the phase angle setting resistor R ₁₃ and the other hair dryers having exactly the same configuration can be used. Can be changed to one.

A second embodiment will be described with reference to FIGS. 5 and 6.

In FIG. 5, the same reference numerals as those used in FIG. 1 according to the first embodiment denote the same parts and portions as those indicated by the reference numerals.

This embodiment and the first embodiment have the same structure unless otherwise specified regarding the connection.

The configuration of this embodiment different from the first embodiment is as follows.

A magnet 12 is attached to a shaft 11 that directly connects the motor M and the blower fan 2.
Is fixed, and a series circuit of the induction coil 13 facing the magnet 12 and the diode D ₂ is connected to the input terminal of the motor rotation speed detection circuit B ′.

The configuration of the motor rotation speed detection circuit B'is the same as the configuration of the motor input voltage detection circuit B of the first embodiment.

Motor rotation speed variable circuit A and motor rotation speed detection circuit B '
Are electromagnetically coupled via the magnet 12 and the induction coil 13, and there is no electrical connection in a pure sense.

Further, the heater circuit D'is simpler than that of the first embodiment.

The other structure is similar to that of the first embodiment, and the description thereof is omitted.

An induced voltage proportional to the rotation speed of the motor M is generated in the induction coil 13. Due to this change in induced voltage, the first
An operation similar to that of the embodiment of FIG.

A third embodiment will be described with reference to FIG.

In FIG. 7, the same reference numerals as those used in FIG. 5 according to the second embodiment indicate the same parts and portions as those indicated by the reference numerals.

This embodiment and the second embodiment have the same structure unless otherwise specified regarding the connection relationship.

The configuration of this embodiment different from the second embodiment is as follows.

A series circuit of a rectifying diode D ₃ , a voltage drop resistor R ₁₄ and a constant voltage capacitor C ₃ is connected between both ends of the heater H ₁ . A Zener diode DZ ₅ is connected between both ends of the constant voltage capacitor C ₃ , and a temperature sensor R made of a voltage dividing resistor R ₁₅ and a nichrome wire or the like showing a positive characteristic resistance change with respect to temperature. A series circuit with ₁₆ is connected.

When the wind velocity changes, the temperature sensor R ₁₆ changes its resistance value, and the divided voltage by the voltage dividing resistor R ₁₅ and the temperature sensor R ₁₆ changes. That is, the temperature sensor R ₁₆ is a wind speed sensor.

The input terminal of the wind speed detection circuit B ″ is connected between both ends of the voltage dividing resistor R ₁₅ .

The wind speed sensor (temperature sensor) R ₁₆ is arranged near the discharge port 5 of the dryer body 1.

The rest of the configuration is the same as that of the second embodiment, so its explanation is omitted.

The capacitor C ₃ is charged by the current flowing through the resistor R ₁₄ and the diode D ₃ . The charging voltage is determined by the Zener voltage of the Zener diode DZ ₅ and becomes a predetermined reference value. This reference voltage is divided by the resistor R ₁₅ and the wind speed sensor R ₁₆ .

As the wind speed increases, the resistance value of the wind speed sensor R ₁₆ decreases more, and the voltage across the voltage dividing resistor R ₁₅ increases. Therefore, the number of lights of the light emitting diodes LD _{1 to} LD ₄ increases as the wind speed increases.

[Effect of device]

According to this invention, the actual air volume in use is detected as the wind speed, and the hair set setting state corresponding to the detected air volume is displayed, so the set state does not have to be checked by actually touching the outlet with the hand. Can be easily known by the display means, and even if the wind speed changes due to attachment of the attachment, the lighting state of the display means changes accordingly, so that the actual wind speed can be known and the usability is improved. The effect is that you can.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a hair dryer according to the first embodiment of the present invention, FIG. 2 is an external view of the hair dryer, FIG. 3 is a sectional view thereof, FIG. 4 is a heater output characteristic diagram thereof, and FIG. FIG. 6 is a circuit diagram of the second embodiment, FIG. 6 is an explanatory diagram of the relationship between the motor and the induction coil in that case, and FIG. 7 is a circuit diagram of the third embodiment. A ... motor speed variable circuit, B ... motor input voltage detection circuit, B '... motor speed detecting circuit, B "... wind speed detection circuit, VR ... wind variable resistor, C ... display circuit, R ₁₆ ... wind sensors, M ... Motor, 5 ... Discharge port, 11 ... Motor shaft, 12
… Magnets, 13… Induction coils

Claims (4)

[Scope of utility model registration request] 1. A hair dryer comprising wind speed varying means, wind speed detecting means, and display means for displaying hair set setting states corresponding to a plurality of types of wind speeds based on detection signals from the wind speed detecting means. 2. The hair dryer according to claim 1, wherein the wind speed detecting means detects a motor terminal voltage. 3. A hair according to claim 1 wherein the wind speed detecting means is composed of a magnet attached to the motor shaft and an induction coil facing the magnet. Dryer. 4. The hair dryer according to claim (1), wherein the wind speed detecting means is a wind speed sensor arranged at a discharge port.