JPH0318881B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a hair iron.

Conventionally, there has been a heating rod provided with a discoloration part that changes color due to heat (for example, Utility Model Application No. 52-32473).
However, since the discolored portion cannot be viewed from any direction, there is a drawback that it may be difficult to see.

Therefore, an object of the present invention is to provide a hair iron that is easy to see from any direction and whose heating rod is easy to operate.

A first embodiment of the invention is shown in FIGS. 1 to 5. In other words, this hair iron is the first
The rear ends of the holder 1 and the second holder 2 are rotatably connected, a heating rod 3 is provided at the tip of the first holder 1, and a hair press plate 4 is provided at the tip of the second holder 2. The heating rod 3 and the hair press plate 4 are opposed to each other so that they can be opened and closed, and are biased open by a spring 5, and locked in the closed state by a locking means 6.

The heating rod 3 has a conical transparent cap 8 attached to the tip of a metal pipe 7, and a temperature indicating member 8 such as a temperature indicating tape or temperature indicating paint that changes color at a predetermined temperature on the inner surface.
A is attached and held between transparent pressers 8b. The transparent presser body 8b and the cap 8 are made of a material with poor thermal conductivity, and the operating temperature of the temperature indicating member 8a is such that when the temperature of the metal pipe 7 reaches a state where it can be used for hair wrapping, the metal pipe 7, It is assumed that the temperature is set to the temperature when heat is transferred through the presser body 8b and the cap 8a. A PTC heater 9 using a positive temperature coefficient thermistor and a heat sink 10 are integrally mounted inside the center of the metal pipe 7 with a heat-resistant tape 11. A support pipe 12 having a different diameter is fitted to the rear end of the heating rod 3, and this support pipe 12 is fitted to the tip of the first holder 1. The first holder 1 is composed of two split housings 1a and 1b, and inner bosses 13 and 14 provided at the tips are fitted into the housings 1a and 1b, and a tapping screw 1 is inserted into the first holder 1.
5 and at the same time the support pipe 12
are fitted into inner bosses 13 and 14 and held.
Further, at the rear end of the first holder 1, the housing 1a,
A shaft 16 is provided between the shafts 1b, and a connecting opening 17 is formed on the side thereof, and the curling rotation center of the hair iron is located on the rear end side of the shaft 16 (imaginary line P).
Cylindrical portions 18a, 18b centered at are formed in the housings 1a, 1b, and the cylindrical portions 18a, 18b
A rotary connector 19 is fitted inside, and the outer surface is covered with a cylindrical cover 20 to integrate the housings 1a and 1b. A sliding power switch 21 is installed inside the first holder 1 at a position in front of the opening 17, a pilot lamp 22 and a current limiting resistor 23 are arranged at the front position, and a pilot lamp 22 and a current limiting resistor 23 are arranged at the front position, that is, away from the shaft 16. A lock button 24 of the locking means 6 is provided at the front end side of the first holder 1. This lock button 24 is provided on the surface of the housing 1a so as to be slidable in the longitudinal direction of the first holder 1, and has a hole 25 formed on the housing 1b side.
The elastic hook 26 extending from the lock button 24 is inserted into the hole 2.
It is located at 5. 27 is pilot lamp 2
2 is a transparent window, 28 is a lead wire, and 29 is a power cord pulled out from the rotary connector 19. When the rear end of a metal plate is bent in steps and pressed against the heating rod 3, the heating rod 3
is made to elastically contact the rear end side gradually from the front end side, and the rear end is further connected to the second holder 2.
It is attached to the tip of the The second holder 2 consists of a main body 30 and a main body cover 31, and the hair holding plate 4 is attached to the tip of the main body 30 with a pair of pin screws 32,
33, and is covered with a main body cover 31. A locking protrusion 34 that locks onto the hook 26 is formed on the surface of the main body cover 31 . Further, a bearing 35 is provided at the rear end 2a of the second holder 2, and when the bearing 35 is fitted into the housing of the first holder 1, the rear end 2a of the second holder 2 is inserted into the opening 17.
The spring 5 is formed of a coil spring between the bottom surface 17a of the opening 17 and the flat surface 36 that fits into the opening 17 of the rear end portion 2a.
is maintained through intervention. In this way, the first holder 1 and the second holder 2 are rotatably connected by the shaft 16 and biased to open by the spring 5, and the holders 1 and 2 are closed by sliding the lock button 24 of the locking means 6. Elastic hook 26 and locking protrusion 3 when completed
4 is disengaged.

In this hair iron, when the plug of the power cord 29 (not shown) is inserted into an outlet (not shown) and the power switch 21 is turned on, the pilot lamp 22 lights up and at the same time, power is supplied to the heater 9 and heat is generated. When the metal pipe 7 of the heating rod 3 is heated and reaches a usable temperature, the temperature indicating member 8
a changes color. At this time, since the cap 8 is formed into a conical shape and the temperature indicating member 8a is attached to its inner surface, the discoloration of the temperature indicating member 8a can be seen from both the axial direction and the radial direction of the heating rod 3. When in use, the first holder 1 and the second holder 2
Hold the hair press plate 4 in one hand and hold it as if you were holding it.
is brought into contact with the heating rod 3, and the lock button 24 is slid to lock the elastic hook 26 to the locking protrusion 34. When the temperature indicating member 8a changes color, the lock button 24 is released and the first and second holders 1 and 2 are opened by the restoring action of the spring 5. Next, insert the heating rod 3 and the hair presser plate 4 into the hair, grip the holders 1 and 2 to sandwich the hair between the heating rod 3 and the hair presser plate 4, and operate the lock button 24 to lock the hair. , hold the holders 1 and 2 with one hand, and lightly pinch the cap 8 with the other hand, turn the hair iron to wrap the hair around it, and hold it for a few seconds.

On the other hand, when the power switch 21 is turned off, the heater 9
The device is then closed again and the locking means 6 is locked to store it. Further, as the temperature of the heating rod 3 decreases, the temperature indicating member 8a also returns to its original color from the discolored state.

With this structure, according to this embodiment, the usable time can be easily determined by the discoloration of the temperature indicating member 8a, and since the temperature indicating member 8a can be viewed from almost any direction, the time required to reach the usable temperature can be easily determined. In addition to being able to use the hair effectively, there is no need to go to the hair iron each time to check whether the color has changed, and conversely, there is no wasted power consumption due to waiting longer than necessary. Furthermore, if the cap 8 is made of a material with low thermal conductivity, the hair can be curled using the cap 8, making it convenient to use.

A second embodiment of the invention is shown in FIGS. 6 and 7. That is, in this hair iron, a pilot lamp 30 is attached to the cap 8 instead of the temperature indicating member 8a, and a thermoswitch 31 for driving the pilot lamp 30 is arranged in parallel with the heater 9.
In addition, the pilot lamp 22 is removed.
FIG. 7 shows a lighting circuit in which a series circuit of a lamp 30, a contact point of a thermoswitch 31, and a current limiting resistor 23 are connected in parallel to a heater 9,
The operating temperature is the temperature detected when the metal pipe 7 reaches the usable temperature. The rest is the same as the first embodiment.

The same effect can be obtained even if the transparent cap itself is made of a temperature-indicating material, for example, a thermochromic molding material that becomes transparent when a predetermined amount of heat is applied.

As mentioned above, the hair iron of this invention is
a heating rod, a holder provided at one end of the heating rod, a hair press plate rotatably connected to the holder and operable to open and close the heating rod, and a low heat holder provided at the other end of the heating rod. A transparent conical cap made of a conductive material is provided, and a temperature indicating means for indicating when the heating rod reaches a usable temperature is provided in the cap, so that the following effects are achieved. In other words, the cap has low thermal conductivity, so it does not get hot even when you hold it, and since the cap is transparent and has a conical shape, the temperature indicator can be easily seen from any direction from the outside. The shape makes it easy to use, and the cap is easy to grip, making it easy to turn the heating rod.For example, you can hold the holder in your right hand and lightly pinch the cap with your left hand, then turn the curling iron to curl your hair.
This has the effect of making hair styling easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a first embodiment of the invention, FIG. 2 is a sectional view taken along the - line in FIG. 3, FIG. 3 is an enlarged sectional view of FIG. 1, and FIG. 4 is a sectional view taken along the line - , FIG. 5 is an enlarged sectional view showing the temperature indicating member, and FIG. 6 is an enlarged sectional view showing the temperature indicating member.
FIG. 7 is a sectional view of the embodiment, and FIG. 7 is a control circuit diagram. 1, 2...Holder, 3...Heating rod, 4...Hair press plate, 8...Cap, 8a...Temperature indicating member, 30
...Pilot lamp, 31...Thermo switch.

Claims (1)

[Scope of Claims] 1. A heating rod, a holder provided at one end of the heating rod, a hair press plate rotatably connected to the holder and operable to open and close the heating rod, and a hair press plate for opening and closing the heating rod. A hair iron comprising a transparent conical cap formed of a low heat conductive material and provided at the other end, and a temperature indicating means for indicating when the heating rod reaches a usable temperature is configured in the cap. 2. The hair iron according to claim 1, wherein the temperature indicating means is a temperature indicating member that is provided inside the cap and changes color at a predetermined temperature. 3. Claim 1, wherein the temperature indicating means comprises a pilot lamp disposed inside the cap, and a thermoswitch provided near a heater built in the heating rod to drive the pilot lamp. Hair iron as described.