JPS6049481B2 - hair curler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that the bottoms of a pair of bottomed metal cylinders 2, 2 are arranged back to back, and a heater 1 made of a positive temperature coefficient thermistor is installed between the bottoms of the pair of bottomed metal cylinders 2, 2. A hair curler is characterized in that a heating part 6 is formed by sandwiching the hair curler, and an outer cylinder 7 integrally formed of a synthetic resin material is attached to the entire surface of the heating part 6, and its purpose is as follows: To provide a hair curler that can be quickly heated to an appropriate temperature and can be easily maintained without the risk of malfunction.

A conventional hair curler is formed as shown in FIG.

In other words, the Kara heater heats a heating rod b made of a metal that is a good thermal conductor, a heating board c, using a space-type heater block d, and controls the temperature using an automatic temperature controller f such as a thermoswitch. The heating rod is 10~20* heating base,, 1゜,゛ ' ・ 1 meeting Nopy, 1, ゛1
-1Λ The heating rod b and the heating board c are arranged in parallel with the integrated structure. The heating of the curler a is controlled to an appropriate temperature by inserting a heating rod into the curler a. The disadvantage of this case is that it takes about 1 minute for 5 minutes to bring the curler a to the appropriate temperature.
A heating time of 0 minutes was required. In view of the response performance of the automatic temperature controller f, it is impossible to rapidly raise the temperature of the heating rod using a large amount of electric power, and early heating is not possible due to the lack of safety in terms of heat resistance of the mounting surface. or,
The electric power supplied for heating is consumed as a loss of heat other than the amount of heat that accounts for the rise in temperature of the curler a, so that the curler is not heated effectively. Also, since the heating rod and heating board c etc. reach high temperatures even when stable, safety after removing the curler,
There was a lack of safety in the event that the top lid of the main body g was covered when heating the curler a. The present invention has been made in view of the above points, and the present invention will be explained in detail below with reference to Examples.

1 in the center is a heater (hereinafter referred to as PTC heater) consisting of a positive temperature coefficient thermistor that heats the curler;
The heater 1 is fixed at both end faces by an electrode rod 3 made of a good conductive metal and a nut 4, which are threaded so as to be in close contact with two metal tubes 2 made of a good conductive metal with a bottom. ing. The two metal tubes 2 have a bottom wall thickness that is in contact with the PTC heater 1 and is thicker than a side wall thickness of the tube.

This is to strengthen the stability of the contact surface with the PTC heater 1, to efficiently heat the PTC heater 1, and to satisfy the heat effect of the lid at the central portion as a curler. P.T.
The C heater 1 and the metal cylinder 2 each have two small holes, and two electrode rods 3 pass through the small holes. The two electrode rods 3 serve both as connection terminals for applying voltage to the PTC heater 1 and as bolts for fixing the PTC heater 1 and the two metal tubes 2 in contact with each other.

By inserting two sleeves 5 made of an insulating synthetic material above and below the electrode portion, insulation between the poles of the PTC heater 1 and the like is satisfied. Furthermore, the sleeve 5 provides a buffering effect to prevent excessive pressure from being applied to the PTC heater 1 due to the elasticity of the material. In this way, the PTC heater 1 and the metal tubes 2 and 2 form a heating section 6 for heating the curler, and the heating section 6 is insert-molded into an outer tube 7 made of a heat-resistant synthetic resin material as shown in FIG. It has been inserted. The outer cylinder 7 electrically insulates the PTC heater 1 and the metal cylinder 2 so that they do not come into contact with the outside, and also serves as a heat storage body when heating the curler. If the outer cylinder 7 is formed on the entire surface of the heating part 6 by insert molding, the adhesion between the heating part 6 and the outer cylinder 7 will be improved, the heat transfer will be improved, and the temperature of the curler surface will quickly increase. This eliminates the need for the work of lifting the cylinder and inserting and assembling it into the outer cylinder, improving work efficiency. Next, the operation of the hair curler according to the present invention will be explained.

By inserting the two electrode rods 3 of the curler into the connection fittings (not shown) of the electrically connected adapter,
A voltage is applied to the PTC heater 1 to generate heat and raise the temperature of the curler. Here, when voltage is applied to the PTC heater 1 due to the electrical characteristics of the PTC heater 1, the temperature rises rapidly due to the large initial power, and as the temperature rises, the resistance value increases, so the power drops drastically and the temperature remains constant. The temperature does not rise above this level, and a stable temperature is maintained, and the PTC heater 1 performs heating temperature control. As a result of the above effects, the surface temperature of the outer tube 7 is quickly raised to an appropriate temperature via the metal tube 2 by heating control of the PTC heater 1 built into the curler, and a safe temperature is maintained. The heated curler is removed and the hair is wrapped around it to curl it. As described above, in the present invention, a heater made of a positive temperature coefficient thermistor is sandwiched between the bottoms of a pair of bottomed metal cylinders, so that the temperature is maintained at an appropriate temperature without the risk of overheating due to self-temperature control of the heater. Not only is it safe, but the heater, which is made up of positive temperature coefficient thermistors, is sandwich-shaped, so it generates a large amount of initial power for the heater, allowing early heating of the curler, and also reduces power consumption by heating the curler all at once. The amount is small and can be heated efficiently.

Furthermore, since heating can be performed directly without requiring a main body case as in the conventional case, a compact product can be obtained.

Moreover, since the entire surface of the heating part formed from the heater and the bottomed metal cylinder is covered with synthetic resin material, the entire surface of the element surface and electrode surface can be insulated from the outside with synthetic resin material, making it safe to handle and easy to wash with water. It has the advantage of being easy to maintain,
Furthermore, the outer cylinder and the heating section can be brought into close contact with each other, thereby improving thermal conductivity from the heating section to the outer cylinder.
Furthermore, since the outer cylinder is integrally formed, there is an advantage that the contact state between the heater and the bottom of the metal cylinder can be stabilized, and assembly variations can be prevented, and failures and performance deterioration can be prevented from occurring.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example, in which 1 is a heater, 2 is a metal tube, 6 is a heating section,
7 is an outer cylinder.

Claims (1)

[Claims] 1 A heating section is formed by arranging the bottoms of a pair of bottomed metal cylinders back to back and sandwiching a heater made of a positive temperature coefficient thermistor between the bottoms of the pair of bottomed metal cylinders, and integrally made of a synthetic resin material. 1. A hair curler comprising an outer cylinder formed in a shape that covers the entire surface of a heating part.