Hair iron

Abstract

The object of the present invention is to provide a hair iron that can reduce hair damage. [Solution] The hair iron of the present invention comprises a first arm and a second arm that are connected in a way that allows them to be opened and closed, A first clamping surface provided on the inside of the first arm, A second clamping surface provided on the inside of the second arm, The hair iron is characterized by having a heating section for heating hair, which is provided on either the first or second clamping surface. In a preferred embodiment of the hair iron of the present invention, the surface of the heating section is characterized by having a curved surface.

Description

Technical Field

[0001] The present invention relates to a hair iron, and more particularly to a hair iron capable of efficiently forming curls.

Background Art

[0002] Generally, hair irons are used for hair styling such as hair straightening, ironing, and treatment. Such a hair iron has one end of a pair of arm members rotatably connected, and heating portions are provided on the other end sides of both arm members facing each other. By sliding the hair iron toward the hair tips with the hair sandwiched between the heated heating portions, the entire hair can be heated for hair styling.

[0003] For example, as a hair iron, a hair styling device (1) including a hand-held treatment unit (2), wherein the hand-held treatment unit (2) has two arms (3, 4), and the two arms (3, 4) are configured to form a clamp having two surfaces (5, 6) facing each other, enabling the hair bundle to be clamped, and the hand-held treatment unit includes means (7) for diffusing steam, and the means (7) for diffusing steam is configured to diffuse steam from a first surface (5) of the two surfaces to a second surface (6) of the two surfaces. In the hair styling device (1), one of the arms (3, 4) has a comb (19) positioned upstream or downstream of one of the surfaces (5, 6) of the arms (3, 4), and a hair styling device characterized by this is known (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, in the prior art, including the aforementioned Patent Document 1, the thickness of the arm is sometimes increased in order to increase the heat capacity, which leads to the problem of the overall size and weight increasing.

[0006] Furthermore, before using a hair iron, various chemicals, such as oxidizing agents and reducing agents, may be used, including hair coloring, hair treatments, and bleaching.

[0007] In such cases, after achieving their intended purpose as oxidizing or reducing agents, these products can actually damage the hair. While attempts have been made to reduce hair damage by using products that minimize damage to the hair and by avoiding prolonged use, these efforts have not always been successful.

[0008] For example, hydrogen peroxide, used in bleaching agents, can provide good coloring, but it also has the problem of damaging hair by acting on and breaking down keratin, the main component of hair.

[0009] Furthermore, conventional technologies often focus on straightening curly hair, and do not consider creating permanent waves by setting curls. Moreover, when setting curls as described above, better contact between the arms would allow for more appropriate processing.

[0010] Furthermore, many curl-forming and setting methods rely heavily on the hair iron itself, and there is a desire for more efficient methods of forming and setting curls using methods other than hair irons.

[0011] Therefore, the object of the present invention is to provide a hair iron that can efficiently form curls. [Means for solving the problem]

[0012] In order to achieve the above objective, the inventors of this invention conducted thorough research on hair irons and, as a result, arrived at the present invention.

[0013] In other words, the hair iron of the present invention comprises a first arm and a second arm that are connected in a way that allows them to be opened and closed, A first clamping surface provided on the inside of the first arm, A second clamping surface provided on the inside of the second arm, The device is characterized by having a heating section for heating hair, which is provided on either the first or second clamping surface.

[0014] Furthermore, in a preferred embodiment of the hair iron of the present invention, the surface of the heating element is characterized by having a curved surface.

[0015] Furthermore, in a preferred embodiment of the hair iron of the present invention, the surface of the heating element is characterized by having a substantially flat surface.

[0016] Furthermore, in a preferred embodiment of the hair iron of the present invention, the plate shape constituting the surface of the heating portion is characterized in that it is different from or the same as the plate shape formed on the first or second clamping surface corresponding to the heating portion.

[0017] Furthermore, in a preferred embodiment of the hair iron of the present invention, the curved surface is characterized in that it occupies a range of 1 / 2 to 1 / 4 of the entire surface of the heating portion.

[0018] Furthermore, in a preferred embodiment of the hair iron of the present invention, the heating element is characterized by having a layer made of at least platinum.

[0019] Also, in a preferred embodiment of the hair iron of the present invention, the heating part further has a layer made of at least one of nickel, copper, electroless nickel, or aluminum.

[0020] Also, in a preferred embodiment of the hair iron of the present invention, the thickness of the platinum layer is 0.05 to 1.0 μm.

[0021] Also, in a preferred embodiment of the hair iron of the present invention, the surface of the heating part is buffed.

[0022] Also, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is provided with a hydrogen peroxide reduction device.

[0023] Also, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm further comprises a temperature control device.

[0024] Also, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device reduces hydrogen peroxide by temperature setting.

[0025] Also, in a preferred embodiment of the hair iron of the present invention, the temperature is 80°C or higher.

[0026] Also, in a preferred embodiment of the hair iron of the present invention, the temperature is 140°C to 180°C.

[0027] Also, in a preferred embodiment of the hair iron of the present invention, it further has a connecting member connecting the first arm and the second arm.

[0028] Furthermore, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device and the temperature control device are integrated into a single unit.

[0029] Furthermore, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms are characterized by being equipped with switches for the hydrogen peroxide reduction device and the temperature control device.

[0030] Furthermore, in a preferred embodiment of the hair iron of the present invention, the connecting member is characterized by being one or more.

[0031] Furthermore, in a preferred embodiment of the hair iron of the present invention, the heating section is a first processing section having a heating plate, wherein the surface of the first processing section is provided with a first processing surface that is a convex curved surface and has a protruding ridge, located in the intermediate part of the surface between the two edges of the heating plate. The other side of the first processing unit is provided with a second processing surface which is a plane that can locally hold hair between itself and the first processing surface, or a concave surface with a curvature smaller than that of the first processing surface. A heater is positioned behind the aforementioned convex curved surface.

[0032] Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature of each processing section is controlled such that a temperature difference is created between the first and second processing surfaces.

[0033] Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature control is characterized in that it is performed within a temperature range of 120°C to 180°C.

[0034] Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature control is characterized in that only the first processing surface is treated within a range of 120°C to 180°C.

[0035] Furthermore, the present invention's iron perm method is characterized by comprising the steps of: applying a permanent wave agent comprising a reducing agent, an alkaline agent, a surfactant, a chelating agent, and a conditioning agent; and performing an iron perm treatment after applying the permanent wave agent.

[0036] Furthermore, a preferred embodiment of the iron perm method of the present invention is characterized in that the iron perm treatment is performed using the hair iron of the present invention.

[0037] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the permanent wave agent is characterized in that it further contains at least one of a hair protectant, a fragrance, a reaction modifier, or an anti-inflammatory agent.

[0038] Furthermore, a preferred embodiment of the iron perm method of the present invention is characterized by further including a step of applying a hair setting agent after the step of performing the iron perm treatment.

[0039] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the hair setting agent is characterized by containing an oxidizing agent, a conditioning agent, a chelating agent, and a surfactant.

[0040] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the conditioning agent is characterized by being at least one selected from hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, amodimethicone, propylene glycol (PG), 1,3-butylene glycol (BG), glycerin, and sorbitol.

[0041] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the cationized polymer is characterized by being at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

[0042] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the hair protective agent is characterized by being at least one selected from the group consisting of hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, and amodimethicone.

[0043] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the cationized polymer is characterized by being at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

[0044] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the reaction modifier is characterized by being dithiodiglycolic acid or ammonium dithiodiglycolic acid.

[0045] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the anti-inflammatory agent is characterized by being at least one selected from the group consisting of glycyrrhizic acid or its salts or derivatives, glycyrrhetinic acid or its salts or derivatives, and allantoin. [Effects of the Invention]

[0046] The hair iron of the present invention offers the advantageous effect of providing a hair iron that can improve the contact between the arms. Furthermore, another aspect of the hair iron of the present invention offers the advantageous effect of being able to efficiently form curls. Furthermore, another aspect of the hair iron of the present invention offers the advantageous effect of being able to reduce damage to the hair.

[0047] Furthermore, according to the hair iron of the present invention, when the gripping portion in the middle of the clamping arm is gripped and operated, the base end rotates relative to each other, and the tip end can perform a clamping action. This clamping action provides the advantageous effect of being able to clamp and straighten the hair with the clamping surface (also called the processing surface or straightening surface) positioned opposite to the tip of the clamping arm.

[0048] Furthermore, the hair iron of the present invention has the advantageous effect of allowing for sufficient curl formation because the hair comes into sufficient contact with the curl-forming surface when curling.

[0049] According to another embodiment of the hair iron of the present invention having a first processing unit with a heating plate, the hair can be processed and curled by the processing unit positioned opposite the clamping arms through the clamping action of a pair of clamping arms.

[0050] Furthermore, the processing unit comprises a first processing surface that is a protruding ridge, one of which is formed as a convex curved surface. Furthermore, since the other surface is equipped with a second processing surface which is a plane that can locally hold the hair between itself and the first processing surface, or a concave surface with a smaller curvature than the first processing surface, the hair can be locally held between the tip of the first processing surface and the second processing surface, allowing for sufficient curling.

[0051] Furthermore, since the second processing surface consists of a flat surface or a concave surface with a smaller curvature than the first processing surface, even if a displacement occurs between the first and second processing surfaces due to play in the gripping arm during the gripping operation, this displacement can be absorbed, allowing the hair to be securely gripped between the first and second processing surfaces, and ensuring that a curl is set properly.

[0052] When the temperature of each processing unit is controlled so that a temperature difference is created between the first and second processing surfaces, sufficient curl can be set in the hair by heating it with the temperature difference between the inside and outside.

[0053] When the temperature control is performed within the range of 120°C to 180°C (relative to room temperature on the other processing surface), the temperature difference between the inside and outside becomes suitable for curling, allowing for more reliable curl formation.

[0054] If the temperature control described above is performed on only the first processing surface within the range of 120°C to 180°C (while the other processing surface is at room temperature), the internal and external heating temperatures and temperature differences will be suitable for curling, allowing for more reliable curling.

[0055] According to another embodiment of the hair iron of the present invention having a platinum layer (also called a platinum layer), the platinum layer provides a moisturizing function to the hair during treatment, suppresses hair drying due to heating during treatment, and has the advantageous effect of maintaining the health of the hair after treatment. [Brief explanation of the drawing]

[0056] [Figure 1] Figure 1 is a side view of a hair iron according to one embodiment of the present invention. [Figure 2] Figure 2 is a perspective view from the handle side of a hair iron in one embodiment of the present invention. [Figure 3] Figure 3 is a perspective view of a hair iron from the straightening side in one embodiment of the present invention. [Figure 4]Figure 4 shows the effect of a hair iron in one embodiment of the present invention. [Figure 5] Figure 5 is a view from the tip of the straightening side of a hair iron in one embodiment of the present invention. [Figure 6] Figure 6 is a view from the tip of the straightening end of a hair iron in one embodiment of the present invention. [Figure 7] Figure 7 shows the effect of a hair iron in one embodiment of the present invention. Although it is difficult to see in the figure, the bar graph is displayed from left to right in the order of hair tips, middle, and roots. [Figure 8] Figure 8 shows a hair iron according to one embodiment of the present invention. [Figure 9] Figure 9 is a top view of a hair iron in one embodiment of the present invention. [Figure 10] Figure 10 shows a hair iron in one embodiment of the present invention, reversed from Figure 11 (the reverse side before assembly). [Figure 11] Figure 11 is a bottom view of a hair iron in one embodiment of the present invention. [Figure 12] Figure 12 shows a hair iron in one embodiment of the present invention, reversed from Figure 9 (the reverse side before assembly). [Figure 13] Figure 13 shows a hair iron according to one embodiment of the present invention. [Figure 14] Figure 14 shows a perspective view of the upper case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are illustrated conceptually. [Figure 15] Figure 15 shows a side view of the upper case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are illustrated conceptually. [Figure 16]Figure 16 shows a perspective view of the lower case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are illustrated conceptually. [Figure 17] Figure 17 shows a side view of the lower case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are illustrated conceptually. [Figure 18] Figure 18 schematically shows the configuration from the heating section to the biasing section in a hair iron according to one embodiment of the present invention. Figure 18(a) shows a perspective view of the plate, Figure 18(b) shows the plate and the components inside the plate, Figure 18(c) shows a cross-sectional view of the plate and the components inside the plate, and Figure 18(d) shows an example of the configuration of the components inside the plate. [Modes for carrying out the invention]

[0057] The hair iron of the present invention comprises a first arm and a second arm that are connected in a way that allows them to be opened and closed, A first clamping surface provided on the inside of the first arm, A second clamping surface provided on the inside of the second arm, The present invention is characterized by having a heating section for heating hair, provided on either the first or second clamping surface. In the present invention, the first arm and the second arm only need to be connected in an openable and closable manner, and are not particularly limited. In the present invention, it is possible to clamp hair using the first clamping surface provided on the inside of the first arm and the second clamping surface provided on the inside of the second arm. It is possible to treat the hair through both clamping surfaces by heating the hair, provided on either the first or second clamping surface. Furthermore, in the present invention, as will be clear from the embodiments described later, it is possible to efficiently form and fix curls in the hair by combining the hair iron of the present invention with a permanent wave agent. The heating section can be on either side. Also, from the viewpoint of operability, it is preferable that the heating section be on the side where the index finger rests when held in the right hand. The rounded side is the heating section, and it is also possible to create curls by moving the wrist in the direction of bending backward.

[0058] Furthermore, in a preferred embodiment of the hair iron of the present invention, the surface of the heating element is characterized by having a curved surface from the viewpoint of setting curls.

[0059] Furthermore, in a preferred embodiment of the hair iron of the present invention, the surface of the heating element is characterized by having a substantially flat surface, in order to achieve a synergistic effect with the curved surface and to set the curl.

[0060] Furthermore, in a preferred embodiment of the hair iron of the present invention, the plate shape constituting the surface of the heating section can be different from the plate shape formed on the first or second clamping surface corresponding to the heating section, from the viewpoint of curl setting, or it can be the same shape from the viewpoint of curl setting and straightening. The advantage of the present invention in the embodiment in which the plate shapes are the same is that both curls and straight hair can be created.

[0061] Furthermore, in a preferred embodiment of the hair iron of the present invention, the curved surface is characterized in that it occupies a range of 1 / 2 to 1 / 4 of the entire surface of the heating section, from the viewpoint of curling and straightening.

[0062] Furthermore, in a preferred embodiment of the hair iron of the present invention, the heating section is characterized by having a layer made of at least platinum, from the viewpoint that the platinum layer (also called the platinum layer) provides a water-retaining function to the hair during treatment, suppresses drying of the hair due to heating during treatment, and maintains the healthy state of the hair after treatment.

[0063] Furthermore, in a preferred embodiment of the hair iron of the present invention, the heating element is characterized by having a layer made of at least one of nickel, copper, electroless nickel, or aluminum, from the viewpoint of improving adhesion with platinum. In the heating element, the outermost platinum surface can come into direct contact with the hair. Regarding the order of the layers, there is a risk of insufficient adhesion between aluminum and platinum, and the adhesion can be improved by sandwiching nickel-copper-nickel in between. Also, there is a risk of insufficient adhesion with combinations of aluminum and copper, and platinum and copper, and when using all materials, it is preferable to use the order of platinum, nickel, copper, electroless nickel, and aluminum.

[0064] Furthermore, as shown in Figure 18, which will be described later, strictly speaking, the heating section can be composed of a plate, with a heating source such as a ceramic heater in the layer below the plate. These heating sections (plates) can be shaped as shown in Figure 18, for example, as will be described later.

[0065] Furthermore, in a preferred embodiment of the hair iron of the present invention, the thickness of the platinum layer is characterized by being 0.05 to 1.0 μm, from the viewpoint of cost reduction and improved adhesion. This is because if it is outside this range, there is a risk that the corners will bulge, and the adhesion between the plates will be poor.

[0066] In a preferred embodiment, the thickness of the nickel layer is preferably 1 to 20 μm, more preferably 5 to 10 μm. In a preferred embodiment, the thickness of the copper layer is preferably 1 to 10 μm, more preferably 2 to 5 μm. In a preferred embodiment, the thickness of the electroless nickel layer is preferably 1 to 10 μm, more preferably 3 to 5 μm. In a preferred embodiment, the thickness of the aluminum layer is preferably 0.1 to 10 mm, more preferably 1 to 3 mm.

[0067] Furthermore, in a preferred embodiment of the hair iron of the present invention, the surface of the heating element is characterized by being buff-polished. For example, by buff-polishing the surface of the aluminum plate constituting the heating element to make it smoother, it becomes possible to eliminate unevenness in the layer placed on top of it, such as the platinum layer. Moreover, by buff-polishing in this manner, it becomes possible to improve the adhesion when plates plated up to the platinum layer are joined together. In addition, deburring of the four corners of the plate may be performed.

[0068] Furthermore, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms are equipped with a hydrogen peroxide reduction device. This makes it possible to efficiently remove excess hydrogen peroxide, such as that used in bleaching agents, and thereby minimize damage to the hair. The hydrogen peroxide reduction device only needs to be installed on the arms, and its location is not particularly limited. In a preferred embodiment, from the viewpoint of avoiding the clamping surface which is expected to become hot due to the heating section, it can be installed anywhere from the center of the arm to the handle side of the arm.

[0069] Furthermore, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device is characterized by reducing hydrogen peroxide by temperature setting. In a preferred embodiment of the hair iron of the present invention, the temperature (temperature of the processing surface of the hair iron) is characterized by being 80°C or higher, from the viewpoint of when hydrogen peroxide begins to be reduced. Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature is characterized by being 140°C to 180°C, from the viewpoint of reducing hydrogen peroxide more efficiently.

[0070] Furthermore, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms are further equipped with a temperature control device. The temperature setting device only needs to be installed on the arm, and its location is not particularly limited. In a preferred embodiment, from the viewpoint of avoiding the clamping surface which is expected to become hot due to the heating part, it can be installed anywhere from the center of the arm to the handle side of the arm.

[0071] In some cases, a temperature control device is installed in the middle of the power cord coming out of the hair iron body, but in this case, it is necessary to pull the cord to turn the power on and off. On the other hand, in the present invention, the hydrogen peroxide reduction device and the temperature control device are installed inside the arm, and as will be described later, if the switch function is installed inside the arm, it is possible to turn the power on and off while holding the hair iron in the right hand, and if a dial-type adjustment mechanism is used, the hydrogen peroxide and temperature can be easily adjusted by turning the dial with the thumb, thereby improving operability.

[0072] Furthermore, in a preferred embodiment of the hair iron of the present invention, the hair iron is further characterized by having a connecting member that connects the first arm and the second arm. The connecting member between the two arms makes it possible to suppress the wobble of the tip of the iron (i.e., the lateral wobble when viewed from the tip of the iron). Specifically, it makes it possible to ensure that the plate surfaces align without misalignment when the iron is pressed. In addition, in a preferred embodiment of the hair iron of the present invention, the connecting member is characterized by being one or more, from the viewpoint of operability.

[0073] Furthermore, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device and the temperature control device are integrated for ease of operation. Also, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms are equipped with switches for the hydrogen peroxide reduction device and the temperature control device. As mentioned above, in some cases the temperature control device is installed in the middle of the power cord coming out of the hair iron body, but in this case, it is necessary to pull the cord to turn the power on and off. On the other hand, in the present invention, the hydrogen peroxide reduction device and the temperature control device are installed inside the arms, and switches can also be provided, so it is possible to improve operability.

[0074] It is also acceptable to bleach the hair before using a hair iron. The bleaching process involves using an alkaline agent to soften the hair. The main components of bleach are hydrogen peroxide and ammonia water (alkaline substances). Ammonia water acts on the cuticle on the surface of the hair, causing it to swell and soften. Hydrogen peroxide then penetrates into the swollen and softened hair, and reacts chemically with melanin. When black hair is bleached, it changes color depending on the application time: reddish-brown → reddish-orange → yellowish-orange → yellow. This is largely because the blackish-brown "eumelanin" is broken down, while the orange-red "pheomelanin" is difficult to break down.

[0075] However, hydrogen peroxide doesn't only oxidize melanin. It can also break down keratin, the main component of hair, potentially damaging it.

[0076] In this invention, it is possible to minimize hair damage by removing the hydrogen peroxide as quickly as possible.

[0077] Furthermore, in a preferred embodiment of the hair iron of the present invention, the heating section is a first processing section having a heating plate, wherein the surface of the first processing section is provided with a first processing surface (the processing surface is synonymous with the clamping surface in the above-described embodiment) formed as a convex curved surface in the middle of the surface between the two edges of the heating plate, and the other side of the first processing section is provided with a second processing surface consisting of a plane that can locally clamp hair between itself and the first processing surface, or a concave curved surface with a curvature smaller than that of the first processing surface, and a heater is arranged behind the convex curved surface. In this way, it is possible to locally clamp the hair between the tip of the first processing surface and the second processing surface to set a sufficient curl.

[0078] Furthermore, since the second processing surface consists of a flat surface or a concave surface with a smaller curvature than the first processing surface, even if a displacement occurs between the first and second processing surfaces due to play in the gripping arm during the gripping operation, this displacement can be absorbed, allowing the hair to be securely gripped between the first and second processing surfaces, and ensuring that a curl is set properly.

[0079] Furthermore, in a preferred embodiment of the hair iron of the present invention, each processing section is characterized in that the temperature is controlled such that a temperature difference is created between the first and second processing surfaces. When each processing section is controlled so that a temperature difference is created between the first and second processing surfaces, sufficient curl can be set by heating the hair with the temperature difference between the inside and outside.

[0080] Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature control is characterized by being performed within a temperature range of 120°C to 180°C. When the temperature control is performed within a temperature range of 120°C to 180°C (relative to room temperature), the temperature difference between the inside and outside becomes suitable for curling, and curls can be set more reliably. That is, if one side is set to room temperature, the other side can be set to a temperature of 120°C to 180°C to set the temperature difference.

[0081] Furthermore, in a preferred embodiment of the hair iron of the present invention, the temperature control is characterized in that only the first processing surface is heated to a temperature range of 120°C to 180°C. When the temperature control is performed only on the first processing surface to a temperature range of 120°C to 180°C (relative to room temperature), the heating temperature and temperature difference between the inside and outside become suitable for curling, and curls can be set more reliably.

[0082] Furthermore, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms may have biasing parts that bias the clamping surfaces and elastically adjust the clamping state between the clamping surfaces. When the gripping parts in the middle of the first and / or second arms are gripped and operated, the base ends of the first and / or second arms rotate relative to each other, and the tip ends of the first and / or second arms (also called the first and / or second clamping arms) can perform a clamping action. This clamping action allows the hair to be clamped and straightened by the clamping surfaces (clamping surfaces) positioned opposite each other at the tip ends of the arms.

[0083] Furthermore, the clamping arm may be provided with a movable support such that at least one of the clamping surfaces can move back and forth relative to the other side, and the clamping arm may be provided with a biasing part that biases the clamping surfaces to elastically adjust the clamping state between the clamping surfaces. This makes it possible to securely clamp hair between the clamping surfaces. The biasing part is not particularly limited, and for example, a spring, leaf spring, spring, rubber, etc., can be used. In addition, the biasing part, for example, a spring, may be separated from the magnet retaining leaf spring to increase the holding force, such as the spring that holds down a bimetallic type thermal fuse. This makes it possible to sense the transmission of temperature with greater accuracy.

[0084] Furthermore, in a preferred embodiment of the hair iron of the present invention, the first and / or second arms may have a core material built in along their longitudinal direction.

[0085] Furthermore, a core material is installed inside the arm so that its longitudinal direction is aligned at least from the tip side to the gripping portion, and this core material maintains its hardness up to a higher temperature than the clamping arm, thereby preventing easy deformation of the tip side of the clamping arm due to heat generated by the heating portion of the clamping surface. Consequently, the gripping portion of the clamping arm can be gripped and force can be smoothly transmitted from the tip side of the clamping arm to the clamping surface, enabling reliable clamping and straightening of the hair.

[0086] Therefore, even if the clamping arm is made thinner to reduce its heat capacity, it is possible to reliably clamp and straighten the hair, and by making the overall weight reduction, it becomes easy to grip the clamping arm and perform fine straightening of curly hair for a certain period of time with flexible operation.

[0087] Furthermore, the core material can be partially provided with a receiving portion that supports the biasing portion, facing the back of the biasing portion. This allows the clamping reaction force from the clamping surface to be received by the receiving portion via the biasing portion, enabling more secure clamping and straightening of the hair by the clamping surfaces.

[0088] Furthermore, since the receiving portion can be provided partially, its shape is less affected by the curved shape of the clamping arm, and the receiving portion can be easily positioned on the back of the biasing portion.

[0089] Furthermore, in a preferred embodiment of the hair iron of the present invention, the core material may have a stopper portion that engages with the clamping surface to restrict its movement in the protruding direction relative to the first and / or second arm. That is, the movement of the clamping surface in the protruding direction relative to the clamping arm can be restricted by engaging with the stopper portion. Therefore, rattling of the clamping surface relative to the clamping arm can be restricted, and the clamping and straightening of the hair by the clamping surfaces can be performed more accurately.

[0090] Furthermore, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of setting curls, at least one of the edges of the heating portion in the hair insertion direction may have a curl-forming curved surface that is curved in the thickness direction of the heating portion. The clamping surface may have heating portions facing each other, and at least one of the edges of the heating portion in the hair insertion direction may have a curl-forming curved surface that is curved in the thickness direction of the heating portion. It is also possible to provide at least one of the edges of the clamping arm tip in the hair insertion direction with a curved surface and / or a flat winding surface for winding the hair.

[0091] It is also possible to arrange the hair wrapped around the curl-forming curved surface so that it extends linearly from the curved surface and contacts the curved or flat surface of the wrapping surface. This allows for more effective curl setting by ensuring that the hair is in sufficient contact with the curl-forming curved surface when curling.

[0092] Furthermore, when applying tension to the hair by wrapping it around the gripping arm and attempting to press the hair against the curl-forming surface, the hair can be easily slid along the curved or flat wrapping surface on the gripping arm side. Therefore, the tension applied to the hair by wrapping can be effectively utilized to press it against the curl-forming surface, allowing for more sufficient curl formation.

[0093] Furthermore, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of being able to accurately clamp and straighten the hair and accurately set the curl, the curl-forming curved surface and / or a plane continuous with the curved surface may also be included.

[0094] In the present invention, at least one of the clamping surfaces is supported by the clamping arm so as to be able to move forward and backward relative to the other side, and the clamping arm can be provided with a biasing part that biases the clamping surface to move forward and elastically adjusts the clamping state between the clamping surfaces. Furthermore, when the clamping surface is retracted, the hair wrapped around the curl-forming curved surface has a plane that is continuous with the curl-forming curved surface and / or the curved surface, that is, it extends linearly from the curl-forming curved surface and contacts the curved surface or plane of the wrapping surface, so that the hair can be accurately clamped and straightened by the opposing, movable clamping surfaces, and the curl can be accurately set.

[0095] In this invention, the winding surface has a plane perpendicular to the clamping surface (straightening surface), and the plane of the winding surface and the curl-forming curved surface are close together in the direction of hair insertion. Therefore, the tension applied to the hair by winding can be directly used as a pressing force on the curl-forming curved surface by sliding it along the plane of the winding surface, making it possible to set the curl more reliably and easily.

[0096] Furthermore, in this invention, the plate, arm, cord, temperature control, magnet, etc., can be improved or modified. For example, the plate plating thickness can be modified to improve adaptability during hair styling. Also, a stopper to prevent arm lateral displacement may be provided from the viewpoint of preventing lateral displacement. Also, an AC cord may be provided from the viewpoint of preventing wire breakage. Furthermore, painting (3 layers) can be applied from the viewpoint of preventing peeling, chemical resistance, and color coordination. In addition, magnets may be used in the configuration between the biasing part and the plate from the viewpoint of heat resistance and magnetic force.

[0097] Furthermore, temperature control is possible to shorten the time it takes to reach the set temperature. A reinforcing plate design may also be adopted to ensure sufficient strength.

[0098] Furthermore, mechanically, the hair iron's upper and lower cases contain a platinum plate, heat-dissipating silicone, a ceramic heater, a mica plate, a heat-resistant magnet, a magnet retainer, and a plate retainer. For control, it can be equipped with a thermistor, a bimetallic thermal fuse, and a PCB unit. Moreover, various effects occur on various molecules such as water molecules due to magnetism, temperature, and platinum components, and through a complex differential effect, it is possible to create a better and more effective situation.

[0099] Furthermore, the present invention's iron perm method is characterized by comprising the steps of: applying a permanent wave agent comprising a reducing agent, an alkaline agent, a surfactant, a chelating agent, and a conditioning agent; and performing an iron perm treatment after applying the permanent wave agent.

[0100] In the present invention, the reducing agent is not particularly limited, but examples include sodium sulfate (sulfite), thioglycerin, butyrolactone thiol (2-mercapto-4-butanolide), mercaptoethanol, dithiothreitol, thioglycolic acid and its salts, cysteine ​​and its salts, cysteamine and its salts, thiolactic acid and its salts, and lactone thiol. From the viewpoint of curl setting, the content of the reducing agent can be 1 to 10% by mass, preferably 2 to 5% by mass, relative to the total amount of the permanent wave agent.

[0101] Furthermore, in the present invention, the alkaline agent is not particularly limited, but examples include amino alcohols such as ammonia water, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, and 2-amino-2-methyl-1,3-propanediol; basic amino acids such as L-arginine; carbonates such as ammonium carbonate, ammonium bicarbonate, sodium carbonate, and sodium bicarbonate; caustic alkalis such as potassium hydroxide and sodium hydroxide; and morpholine. From the viewpoint of increasing the reducing power of the reducing agent, the alkaline agent content can be 0.1 to 10% by mass, preferably 1 to 5% by mass, relative to the total amount of the permanent wave agent.

[0102] In the present invention, examples of surfactants include cationic surfactants, quaternary ammonium salts, and / or tertiary amines. Examples of quaternary ammonium salts include alkyltrimethylammonium chloride solution, stearyltrimethylammonium chloride, or stearyltrimethylammonium bromide. Examples of tertiary amines include dimethylaminopropyl stearate, diethylaminoethyl stearate, or behenamidopropyldimethylamine. The surfactant content can be 0.01 to 10% by mass, preferably 0.1 to 5% by mass, relative to the total amount of the permanent wave agent, from the viewpoint of increasing penetration into the hair and improving the texture.

[0103] Furthermore, in the present invention, the metal chelating agent is not particularly limited, but examples include edetate salts, sodium polyphosphate, phytic acid, etc. The content of the metal chelating agent can be 0.001 to 2% by mass, preferably 0.01 to 1% by mass, relative to the total amount of the permanent wave agent, from the viewpoint of preventing oxidation of the reducing agent.

[0104] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the iron perm treatment is characterized by being performed using the hair iron of the present invention. As a result, as will be described later, it becomes possible to efficiently form curls by using the hair iron of the present invention in combination with the permanent wave agent.

[0105] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the permanent wave agent is characterized in that it further contains at least one of a hair protectant, a fragrance, a reaction modifier, an anti-inflammatory agent, or a wetting agent.

[0106] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the hair protective agent is characterized by being at least one selected from the group consisting of hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, and amodimethicone. The content of the hair protective agent can be 0.1 to 10% by mass, preferably 1 to 5% by mass, relative to the total amount of the permanent wave agent, from the viewpoint of hair protection. Furthermore, in a preferred embodiment of the iron perm method of the present invention, the cationized polymer is characterized by being at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

[0107] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the reaction modifier is characterized by being dithiodiglycolic acid or ammonium dithiodiglycolic acid, from the viewpoint of setting curls. The content of the reaction modifier can be 1 to 10% by mass, preferably 2 to 5% by mass, relative to the total amount of the permanent wave agent, from the viewpoint of preventing hair damage.

[0108] Furthermore, in a preferred embodiment of the iron perm method of the present invention, from the viewpoint of anti-inflammatory effects, the anti-inflammatory agent is characterized by being at least one selected from the group consisting of glycyrrhizic acid or its salts or derivatives, glycyrrhetinic acid or its salts or derivatives, and allantoin. From the viewpoint of suppressing inflammation, the content of the anti-inflammatory agent can be 0.01 to 0.5% by mass, preferably 0.1 to 0.3% by mass, based on the total amount of the permanent wave agent.

[0109] Furthermore, in a preferred embodiment of the iron perm method of the present invention, from the viewpoint of penetration, the wetting agent is characterized by being at least one selected from the group consisting of glycerin, diglycerin, or 1,3-butylene glycol. From the viewpoint of penetration, the content of the wetting agent can be 0.01 to 10% by mass, preferably 0.1 to 5% by mass, based on the total amount of the permanent wave agent.

[0110] Furthermore, in a preferred embodiment of the iron perm method of the present invention, from the viewpoint of setting curls, the method further includes a step of applying a hair setting agent after the iron perm treatment.

[0111] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the hair setting agent is characterized by containing an oxidizing agent, a conditioning agent, a chelating agent, and a surfactant.

[0112] In the present invention, the oxidizing agent is not particularly limited, but examples include bromate salts and hydrogen peroxide. From the viewpoint of fixing the curl, the content of the oxidizing agent can be 0.1 to 10% by mass, preferably 3.5 to 9% by mass, based on the total amount of the permanent wave agent.

[0113] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the conditioning agent is characterized by being at least one selected from hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, amodimethicone, propylene glycol (PG), 1,3-butylene glycol (BG), glycerin, and sorbitol. From the viewpoint of protecting the hair, the content of the conditioning agent can be 0.1 to 10% by mass, preferably 1 to 5% by mass, based on the total amount of the hair setting agent.

[0114] Furthermore, in a preferred embodiment of the iron perm method of the present invention, the cationized polymer is characterized by being at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

[0115] Furthermore, in the present invention, the metal sequestering agent is not particularly limited, but examples include edetate salts, sodium polyphosphate, phytic acid, etc. The content of the metal sequestering agent can be 0.001 to 1% by mass, preferably 0.01 to 0.1% by mass, relative to the total amount of the hair setting agent, from the viewpoint of preventing oxidation of the reducing agent.

[0116] In the present invention, examples of surfactants include cationic surfactants, quaternary ammonium salts, and / or tertiary amines. Examples of quaternary ammonium salts include alkyltrimethylammonium chloride solution, stearyltrimethylammonium chloride, or stearyltrimethylammonium bromide. Examples of tertiary amines include dimethylaminopropyl stearate, diethylaminoethyl stearate, or behenamidopropyldimethylamine. The surfactant content can be 0.01 to 10% by mass, preferably 0.1 to 5% by mass, based on the total amount of the hair setting agent, from the viewpoint of increasing penetration into the hair and improving the texture.

[0117] In the present invention, the hair setting agent may further contain a pH adjuster from the viewpoint of maintaining stability. In the present invention, the pH adjuster is not particularly limited, but examples include citric acid or its salts, phosphoric acid or its salts, etc. From the viewpoint of maintaining stability, the content of the pH adjuster can be 0.001 to 5% by mass, preferably 0.01 to 1% by mass, based on the total amount of the hair setting agent. [Examples]

[0118] The following describes examples using the hair iron of the present invention, but the present invention is not limited to the following examples.

[0119] Example 1 Figure 8 shows a hair iron according to one embodiment of the present invention. In the figure, 1 is the first arm, 2 is the second arm, 3 is the first clamping surface, 4 is the second clamping surface, 5 is the hydrogen peroxide reduction device, 6 is the temperature control device, 7 is the connecting member, 8 is the connecting member, and 9 is the switch. The hydrogen peroxide reduction device 5, the temperature control device 6, the connecting members 7 and 8, etc., are not essential, but the explanation will use a hair iron that includes them. A brief explanation of how to use the hair iron is as follows: The power plug is inserted into an outlet, and one of the clamping surfaces (3, 4) is heated by the heater (heating source). The hair is clamped between the clamping surfaces (3, 4) by the clamping action of the first and second arms, and the hair iron treatment can be performed on the clamped hair along the treatment surface of the clamping surfaces (3, 4) by heating by the heating unit. In this example, the hydrogen peroxide reduction device 5 is installed inside the arm, and the switch function 9 is also installed inside the arm. Therefore, the power can be turned on and off while holding the hair iron in the right hand. In this example, the hydrogen peroxide reduction device 5 and the temperature control device 6 are integrated and have a dial-type adjustment function. Therefore, the hydrogen peroxide and temperature can be easily adjusted by turning the dial with the thumb, improving operability. Note that the temperature adjustment of the hydrogen peroxide reduction device 5 and the temperature control device 6 is not limited to a dial, but can be done by push buttons, levers, etc., and is not particularly limited.

[0120] Additionally, for hair irons equipped with a "hydrogen peroxide removal" mode, it is possible to add a "hydrogen peroxide removal" mode to the iron's dial and set the temperature to 150°C.

[0121] Figure 9 is a top view of a hair iron according to one embodiment of the present invention. In the figure, 33 indicates one side of the tip side 29, 31, 35 indicates one side of the gripping part 21, 23, 37 indicates the inclined surfaces of both sides 33, 35, and 39 indicates the other side of the tip side 29, 31.

[0122] Figure 10 shows a hair iron in one embodiment of the present invention, reversed from Figure 11 (the reverse side before assembly).

[0123] Figure 11 is a bottom view of a hair iron according to one embodiment of the present invention. In the figure, 33 indicates one side of the tip side 29, 31, 35 indicates one side of the gripping part 21, 23, 37 indicates the inclined surfaces of both sides 33, 35, and 39 indicates the other side of the tip side 29, 31.

[0124] Figure 12 shows a hair iron in one embodiment of the present invention, reversed from Figure 9 (the reverse side before assembly).

[0125] Figure 13 shows a hair iron according to one embodiment of the present invention. In the figure, 3 is the first clamping surface, 4 is the second clamping surface, 15 and 17 are the base end, 19 is the rotation axis, 21 and 23 are the gripping parts, 25 and 27 are the points of force application, and 29 and 31 are the tip ends.

[0126] Figure 14 shows a perspective view of the upper case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are conceptually illustrated. In the figure, 50 indicates the core material, and 51 indicates the plate and other parts.

[0127] Figure 15 shows a side view of the upper case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are conceptually illustrated. In the figure, 50 indicates the core material, and 51 indicates the plate and other parts.

[0128] Figure 16 shows a perspective view of the lower case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are conceptually illustrated. In the figure, 50 indicates the core material, and 51 indicates the plate and other parts.

[0129] Figure 17 shows a side view of the lower case portion of the main body for assembling the upper and lower parts of a hair iron in one embodiment of the present invention. The plate and core material that constitute the heating section are conceptually illustrated. In the figure, 50 indicates the core material, and 51 indicates the plate and other parts.

[0130] Figure 18 schematically shows the configuration from the heating section to the biasing section in a hair iron according to one embodiment of the present invention. In the figure, 60 is a plate, 61 is a ceramic heater (heating source), 62 is a mica plate, 63 is a bimetal, 64 is a bimetal retainer, 65 is a leaf spring for retaining the magnet, 66 is a leaf spring for the plate (biasing section), and 67 is a magnet. Figure 18(a) shows a perspective view of the plate, Figure 18(b) shows the plate and components within the plate, Figure 18(c) shows a cross-sectional view of the plate and components within the plate, and Figure 18(d) shows an example of the configuration of components within the plate. The plate is formed using an aluminum base as shown in Figure 18(a), and can be plated thereon in the order of electroless nickel, copper, nickel, and platinum. As shown in Figure 18(b), the components of the plate, such as the ceramic heater (heat source) 61, mica plate 62, bimetal 63, bimetal retainer 64, magnet retaining leaf spring 65, plate leaf spring (biasing part) 66, and magnet 67, can be arranged, for example, as shown in Figure 18(d). As shown in the figure, by changing the spring and separating the spring that holds the bimetal type thermal fuse from the magnet retaining leaf spring, it is possible to further improve the holding force. Furthermore, with these configurations, it is also possible to sense the transfer of temperature with greater accuracy.

[0131] As shown in these diagrams, the hair iron comprises an iron body to which a power cord is connected. The power cord may also be equipped with a temperature control device, a power plug, etc.

[0132] Next, an embodiment of a hair iron having a processing surface formed by a convex curved surface will be described.

[0133] A hair iron consists of an iron body to which a power cord is connected. The power cord may include a temperature control device, a power plug, etc. The temperature control device has an on / off switch and a temperature adjustment lever on its housing. The temperature control device allows for on / off control of the ceramic heater (also called a heating element), which will be described later, by operating the switch, and allows for temperature control of the ceramic heater, for example, within a range of 60°C to 180°C, by operating the lever.

[0134] The iron body comprises a pair of clamping arms (first and second arms) 1 and 2, and a pair of processing surfaces (also called clamping surfaces) 3 and 4. The clamping arms 1 and 2 are made of resin such as a polyester-based engineering plastic with a coefficient of thermal expansion of 8.8 × 10⁻⁵ cm / cm / ℃, and their base ends 15 and 17 are rotatably connected to each other by a rotating shaft 19.

[0135] A pull-out section for drawing out a power cord is integrally provided on either the base end 15 or 17 of the clamping arms 1 or 2. The pull-out section is formed in a cylindrical shape and extends from the base end 15 so as to be inclined with respect to the longitudinal direction of the clamping arm. Engaging protrusions are provided around the inner circumferential surface of the tip of the pull-out section. Engaging recesses, which are provided around the cylindrical grommet on the power cord side, engage with the engaging protrusions. This holds the grommet in place so that it interlocks with the pull-out section. The power cord curves from the clamping arm into the pull-out section and is then pulled out straight from the pull-out section through the grommet.

[0136] In this way, by pulling out the power cord through the pull-out section, the curved portion of the power cord (the part that bends inside the hair iron and is on the end side in the direction of the handle) can be protected. For example, when the gripping arms 1 and 2 of the hair iron are rotated or handled, it is possible to prevent load from being placed on the curved portion and to prevent the power cord from breaking due to repeated load on the curved portion.

[0137] Furthermore, since the grommet is held in place by the pull-out section, the engaging projection on the pull-out section and the engaging recess on the grommet can be made larger to serve as the holding portion for the grommet. Therefore, the grommet can be securely held and the power cord can be reliably protected.

[0138] Gripping portions 21 and 23 are provided in the middle of each of the clamping arms 1 and 2. These gripping portions 21 and 23 are formed to be relatively thick, as shown in Figure 13, etc., to facilitate gripping, and are approximately the same thickness as the base ends 15 and 17.

[0139] The gripping portions 21 and 23 are provided with fulcrum points 25 and 27 formed on their tip ends, with inclined surfaces. These fulcrum points 25 and 27 are designed to allow the thumb or index finger to apply force when gripping the gripping portions 21 and 23. When viewed from the side in Figures 9 to 12, the fulcrum points 25 and 27 are formed to be slightly larger than the entire gripping portions 21 and 23, making it easier to apply force with the thumb or index finger. A heat-resistant sheet is bonded from the fulcrum points 25 and 27 to the tip ends 29 and 31.

[0140] The tip ends 29 and 31 of the clamping arms 1 and 2 are formed to be thinner than the gripping portions 21 and 23 in the direction of mutual alignment. Furthermore, the tip ends 29 and 31 are also formed to be thinner than the gripping portions 21 and 23 in the direction intersecting the alignment direction, and are set to be offset to one side relative to the gripping portions 21 and 23. Consequently, one surface 33 of the tip ends 29 and 31 protrudes to one side more than one surface 35 of the gripping portions 21 and 23, and both surfaces 33 and 35 are set to be continuous in a stepped manner by the inclined surface 37. The other surface 39 of the tip ends 29 and 31 is shaped to be offset to one side in accordance with the one surface 33. It is formed and positioned so as to fit into the central side of the gripping portions 21 and 23.

[0141] Such clamping arms are formed in a hollow shape, and may be divided into sections from the central part to form a joint structure. These divided sections can be fastened together with fasteners, such as screws, at the tip ends 29, 31, gripping portions 21, 23, and base ends 15, 17. Fastening holes may be formed through the divided sections at the tip ends 29, 31, although these are not shown in the figures.

[0142] Multiple reinforcing ribs may be provided within the hollow gripping portions 21 and 23, although these are not shown. One of the gripping arms may have protrusions on the opposing sides of both arms, and the other gripping arm may have a recess into which the protrusion fits. The protrusion may abut against the bottom surface of the recess to function as a stopper.

[0143] Thus, the clamping arm is configured such that the base ends 15 and 17 are rotatably connected to each other, and the tip ends 29 and 31 perform a clamping action when the gripping parts 21 and 23 in the middle section are operated.

[0144] A core material is further housed within the aforementioned tip sections 29 and 31. This core material is formed in a symmetrical shape. One core material will be described, and the other core material will be described by referring to the first core material, and its description will be omitted.

[0145] The core material is installed inside the clamping arm so that its longitudinal direction is aligned from the tip side 29 to at least the gripping portion 21. However, it is also possible to install the core material inside the clamping arm from the tip side 29 to the entire base side 15.

[0146] The core material maintains its hardness up to a higher temperature than the clamping arm, thereby restricting thermal deformation of the clamping arm. Therefore, in this embodiment, the core material is made of stainless steel, a material with a smaller coefficient of thermal expansion than the resin material of the clamping arm. However, the core material only needs to have a smaller coefficient of thermal expansion than the clamping arm, and can also be made of titanium, ceramic, super engineering plastic, etc.

[0147] The core material may have fastening sections integrally provided at both ends of the long plate-shaped base portion. These fastening sections can be fastened together with the joined sections. The fastening sections are provided with holes for inserting screws, which are fasteners. A temporary fastening section may be provided at the end of the fastening section. This temporary fastening section is provided at one end in the longitudinal direction of the core material and is for pre-connecting to the section. This temporary fastening section is provided with a positioning hole that fits onto a positioning pin protruding from the section side. The temporary fastening section is also provided with a hole for inserting screws, which are fasteners for temporary fastening.

[0148] A vertical wall is provided along one side edge of the long plate-shaped base portion. The vertical wall also serves as a stopper for the clamping surface 3. The other vertical wall is provided along the other side edge of the base portion and the other side edge of the fastening portion and temporary fastening portion.

[0149] The tip ends 29 and 31 may have a flat vertical wall surface and a flat bottom wall surface that house a core material inside. The tip ends 29 and 31 may be provided with processing surface support holes that movably support the processing surface so that it can move back and forth relative to the other side.

[0150] One processing surface consists of a heating plate (also called a plate), a ceramic heater 61, a magnet plate 67, a first spring (magnet retaining spring) 65, and a second spring 66. In the example in Figure 18, a flat plate is shown, but a curved plate like the one on the left in Figure 5 may also be used. The heater 61 can be installed on the rounded side on the left in Figure 5.

[0151] The heating plate is formed from a lightweight material with high thermal conductivity, such as aluminum, into a rectangular plate shape when viewed from the opposite side, and its surface is fluorine-coated. A first treatment surface is provided in the middle of the heating plate's surface. Specifically, a bulge portion 80 (the rounded portion on the left side in Figure 5) is integrally provided in the middle of the heating plate's surface, bulging outwards toward the other side, the treatment surface. This bulge portion has a roughly semicircular cross-section and is formed as a protrusion along the longitudinal direction of the heating plate. Therefore, the surface of the bulge portion 80 is a roughly semicircular and convex curved surface. One of the treatment surfaces is formed by the surface of this bulge portion 80. Behind the heating plate, a housing portion (the inner part of the plate, capable of housing the member 70 inside the plate) is integrally provided. The heating plate is movably supported by the housing portion in relation to the treatment surface support hole, and is able to move back and forth relative to the other side, the treatment surface.

[0152] The upper and lower walls of the housing are provided with engaging pieces (see Figure 18) to restrict the protruding movement of the heating plate beyond a certain point. The ceramic heater 61, the magnet plate 67, and the first spring are housed within the housing.

[0153] The ceramic heater has a rectangular plate shape, generates heat up to a maximum temperature of approximately 180°C, and conducts heat to the heating plate, and is electrically connected to the power cord side. In this embodiment, the temperature of the ceramic heater is controlled within a range of 120°C to 180°C by operating the temperature control device.

[0154] The magnet plate is formed in a rectangular plate shape using a 15,000 gauss neodymium magnet or the like, and is arranged so that its south poles or north poles face each other with respect to the processing surface. In this embodiment, the magnet plate is arranged so that its south poles face each other with respect to the processing surface.

[0155] The first spring is made of a leaf spring and biases the magnet plate towards the back of the heating plate within the housing, bringing the ceramic heater into close contact with the back of the heating plate and stably supporting the magnet plate.

[0156] The second spring (plate spring) 66 is supported on the vertical wall side at the rear of the housing (see Figure 18). This second spring 66 constitutes a biasing means that biases the processing surface and elastically adjusts the clamping state with the other processing surface. The second spring 66 is made of a leaf spring, with both ends set to be inclined, and its edges engage with the projection on the divided portion side in the left-right direction (longitudinal direction).

[0157] On the other hand, the tip side 31, like the tip side 29, has a flat vertical wall surface and a flat bottom wall surface that house a core material inside. The tip side 31 is also provided with a processing surface support hole that movably supports the processing surface to one side. The processing surface is movably supported in this processing surface support hole.

[0158] Therefore, the processing surfaces 3 and 4 are positioned opposite the tip ends 29 and 31 of the clamping arms 1 and 2, and the hair is heated and straightened by the clamping motion of the clamping arms 1 and 2.

[0159] The aforementioned processing surface 4, like the processing surface 3, is equipped with a magnet plate, a first spring, and a second spring, and is provided with a heating plate, and an electric heating plate is provided in place of a ceramic heater. The electric heating plate can refer to a mica sheet. The role of the electric heating plate is that, since the heater was not installed and the internal space dimensions changed, making it impossible to install a magnet, the thickness that would have been for the heater was supplemented with a mica sheet, allowing the magnet to be installed. Mica has excellent properties of electrical insulation and heat resistance.

[0160] The heating plate is formed from a lightweight material with high thermal conductivity, such as aluminum, into a rectangular plate shape when viewed from the opposite side, and its surface is coated with fluorine. The surface of the heating plate forms a second processing surface that is opposite the first processing surface and capable of gripping hair. The second processing surface is flat and is substantially perpendicular to the gripping direction of the gripping arms 1 and 2. The middle portion of the second processing surface is in close local contact with the first processing surface at one point to grip the hair. However, the second processing surface may be formed at an angle with respect to the gripping direction.

[0161] Behind the heating plate, a housing is integrally provided for housing the electric heating plate, the magnet plate, and the first spring, and engaging pieces are provided on the upper and lower walls of the housing. A second spring is positioned on the rear side of the housing, which constitutes a biasing means for biasing the processing surface and elastically adjusting the clamping state with the other processing surface, as described above.

[0162] The electric heating plate has heat resistance and is rectangular in shape. In this embodiment, for example, it is formed from a mica plate in which soft or hard mica is integrated with a high heat-resistant silicone resin. The electric heating plate is interposed between the magnet plate and the heating plate, and is in close contact with the heating plate by the biasing force of the first spring, while also stably supporting the magnet plate.

[0163] Next, we will explain how to use the aforementioned hair iron to create curls.

[0164] First, when using the hair iron, the hair is coated with a first agent, which is an aqueous solution mainly composed of mercapto compounds (reducing agents) such as thioglycolic acid and cysteine, to which basic substances such as ammonia, monoethanolamine, and triethanolamine are added to adjust the pH to 6-10. This application reduces the disulfide bonds of cystine contained in the keratin protein in the hair, causing them to be cleaved into mercapto groups. After that, the hair is washed with water and dried sequentially with a hairdryer, etc., and then the hair is curled by treatment with a heated hair iron.

[0165] Specifically, the temperature of the ceramic heater 61 is controlled by the temperature control device, and the ceramic heater is heated to 120°C to 180°C. Then, the gripping parts 21 and 23 of the clamping arms 1 and 2 are gripped, and force is applied by placing the thumb and index finger on the force application points 25 and 27, thereby clamping the hair between the hot plates (plates) of the processing surfaces 3 and 4. As a result, the hair is held between the first processing surface and the second processing surface of the hot plate, and rapid thermal stress is applied only to the inside of the hair by heating the first processing surface to 120°C to 180°C.

[0166] At this time, since the magnet plates 67 are set with their south poles facing each other, when the two processing surfaces 3 and 4 approach each other due to the gripping action of the gripping arms 1 and 2, the magnet plates 67 repel each other, and at the same time the second spring 66 bends in response to the repulsion, causing the magnet plates 67 to become parallel to each other. As a result, the orientation of the processing surfaces 3 and 4 is corrected, and the corrected surfaces (processing surfaces) become parallel. Therefore, when the processing surfaces come into close contact as the gripping action progresses further, they can be made to contact in a parallel state from the beginning of the close contact.

[0167] During the clamping and heating process, since the first processing surface is a convex curved surface and the second processing surface is a flat surface (see, for example, Figure 5), the hair is locally clamped only at one point where the tip of the first processing surface and the second processing surface are facing each other. Therefore, it is possible to apply localized and rapid thermal stress to the hair.

[0168] Then, while maintaining that position, slide the clamping arms 1 and 2 towards the ends of the hair, and gradually rotate the hair iron with clamping arm 1 facing inward. This allows for continuous, localized heat stress on the hair, ensuring that artificial curls are set effectively. To straighten curly hair or correct artificial curls, slide the clamping arms 1 and 2 towards the ends of the hair without rotating the hair iron.

[0169] When sliding the gripping arms 1 and 2, the gripping force between the gripping arms 1 and 2 is slightly loosened so that the second spring 66 does not fully flex. This allows the second spring to flex, enabling the first and second gripping surfaces 3 and 4 to follow the thick and thin hair bundles, even when there are thick or thin hair bundles. This ensures that the hair is securely gripped by the first and second gripping surfaces 3 and 4 while the gripping arms 1 and 2 move smoothly. It can be slid along.

[0170] Furthermore, since the first processing surface 3 and the second processing surface 4 grip the hair locally in a linear manner at a single point, the gripping arms 1 and 2 can be easily and smoothly slid over the hair, making it easy to set curls.

[0171] Furthermore, by sliding the gripping arms 1 and 2, tension can be applied to the hair, ensuring that the hair is firmly pressed against the second processing surface 4 and that curls are reliably set.

[0172] Furthermore, since the second processing surface 4 is flat, even if a displacement occurs between the first and second processing surfaces 3 and 4 during sliding due to play in the gripping arms 1 and 2 and frictional resistance between the hair and the first and second processing surfaces 3 and 4, this displacement can be absorbed, and the hair can be securely gripped between the first and second processing surfaces 3 and 4, thereby ensuring that the hair is curled.

[0173] Since the second processing surface 4 is a plane that is almost perpendicular to the clamping direction, even if a displacement occurs between it and the first processing surface 3 as described above, the clamping force of the clamping arms 1 and 2 can be reliably applied to the hair as a clamping force with the first processing surface 3, thereby reliably setting the hair into a curl.

[0174] Meanwhile, as the hair moves at a predetermined speed between the magnetic plates 67 with their south poles facing each other, reduction energy is generated according to Fleming's right-hand rule. This energy is generated by electrons from the magnetic poles of the right-rotating magnetic plates 67, promoting the reduction action of the first solution. Moreover, it also works to close the cuticle that forms the outer layer of the hair. When the cuticle is closed, it blocks ultraviolet rays from penetrating into the hair, thus preventing the hair from being damaged by ultraviolet rays.

[0175] Furthermore, this reduction energy reduces the size of the water clusters in the first solution. This reduction in cluster size increases the penetration of the first solution into the hair. As a result, the reducing action of the first solution is further promoted. Consequently, the treatment time, which carries the risk of damaging the hair, can be shortened, and hair damage can be suppressed.

[0176] Subsequently, a second solution consisting of an aqueous solution of an oxidizing agent such as sodium bromate and hydrogen peroxide is applied to the hair. As a result, the mercapto groups are oxidized, new disulfide bonds are formed in the hair, and this curl state can be fixed.

[0177] As explained above, in conventional methods, when curling hair by gripping it over a wide area between a pair of processing surfaces that are in overall contact, the curling force in localized or minute areas becomes weak, and as a result, the curl cannot be set sufficiently. However, with the hair iron of this embodiment, the first and second processing surfaces 3 and 4, which are in localized contact, can grip and heat the hair locally, ensuring that the curl is set reliably.

[0178] In this embodiment, since the first processing surface 3 and the second processing surface 4 locally grip the hair in a linear manner at a single point, the gripping arms 1 and 2 can be easily slid over the hair, making it easy and reliable to set the curl.

[0179] Furthermore, by sliding the gripping arms 1 and 2, tension can be applied to the hair, ensuring that the hair is firmly pressed against the first processing surface 3, thereby more effectively setting the curl.

[0180] Furthermore, in this embodiment, since the second processing surface 4 is flat, even if a misalignment occurs between the first and second processing surfaces 3 and 4 when the gripping arms 1 and 2 are slid against the hair, this misalignment can be absorbed, and the hair can be securely gripped between the first and second processing surfaces 3 and 4, thereby ensuring that a curl is set properly.

[0181] In this embodiment, the ceramic heater 61 is temperature-controlled so that a temperature difference is created between the treatment surfaces during heating, allowing sufficient curling of the hair to be achieved through this temperature difference between the inside and outside.

[0182] In this embodiment, by providing the aforementioned temperature difference, one of the processing surfaces is controlled within the range of 120°C to 180°C. This temperature difference between the inside and outside of the hair is suitable for curling, allowing for more reliable curl formation.

[0183] In this embodiment, the first processing surface 3 is controlled to a temperature range of 120°C to 180°C, while the second processing surface 4 is kept at room temperature. This results in a heating temperature and temperature difference between the inside and outside that is more suitable for curling, allowing for more reliable curl formation.

[0184] Furthermore, the second processing surface can also be deformed. In the hair iron, instead of the second processing surface in the above embodiment, a concave curved surface having a smaller curvature than the first processing surface can also be formed.

[0185] In addition to achieving the same effects as the above embodiment, the modified hair iron can also correct any misalignment between the first and second processing surfaces when the gripping arm is slid across the hair. The concave shape of the second processing surface guides the first processing surface towards the center, thereby correcting the misalignment. Therefore, the gripping state by the first and second processing surfaces can be reliably maintained, enabling more reliable curl setting.

[0186] It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. For example, one or both of the processing surfaces can be fixed in place relative to the tip sides 29 and 31. The magnet plate, first spring, heating plate, etc., can also be omitted.

[0187] Example 2 Next, we investigated whether hydrogen peroxide could actually be removed using each of these hair irons.

[0188] <Decomposition temperature of hydrogen peroxide> Approximately 1g of 100% human white hair (product number: BM-WA, manufactured by Beaulux) was bleached to create an evaluation hair bundle with residual hydrogen peroxide inside the hair. The decomposition temperature of hydrogen peroxide inside the hair was determined using the following method, and this temperature was defined as the "hydrogen peroxide removal mode".

[0189] <Measurement of hydrogen peroxide concentration at ironing temperatures> Mix Bleach Agent 1 from Formulation Example 1 and Bleach Agent 2 from Formulation Example 2 in a 1:1 ratio until uniform, apply to hair strands, and leave at room temperature for 30 minutes. Then rinse with warm water, wash with our Oolong Shampoo (product name: Nano Supplement Cleansing Shampoo OT), rinse with warm water, and dry with a hairdryer. Then, pass the hair strands through the hair iron of the present invention three times, set to 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, and 180°C. After that, wet each hair strand with water, and press hydrogen peroxide concentration test paper (Mitsubishi Gas Chemical Trading Co., Ltd.: Hydrogen Peroxide Concentration Test Paper) against the ends, middle, and roots of the hair strands for 5 seconds to visually measure the concentration and measure the color using a spectrophotometer. Table 1 shows Formulation Example 1 (Bleach Agent 1). Table 2 shows Formulation Example 2 (Bleach Agent 2).

[0190] [Table 1]

[0191] [Table 2]

[0192] <Determination of hydrogen peroxide decomposition temperature in hair irons> Next, the hydrogen peroxide concentration test strips were visually inspected and the results are shown in Table 3.

[0193] [Table 3]

[0194] The L*a*b* color space was measured using a hydrogen peroxide concentration test strip with a spectrophotometer (model: CM-36dG, manufactured by Konica Minolta), and the results are shown in Table 4 and Figure 7. The hydrogen peroxide concentration test strip turns bluer at higher hydrogen peroxide concentrations. Therefore, when measured with a spectrophotometer, a lower b* value indicates a higher hydrogen peroxide concentration. From Tables 3 and 4, temperatures above 150°C, where the hydrogen peroxide concentration decreases significantly, are appropriate. For this reason, the "hydrogen peroxide removal" mode can be set to 150°C.

[0195] [Table 4]

[0196] As a result, it was found that it is possible to efficiently reduce hydrogen peroxide while operating a hair iron, thereby minimizing damage to the hair.

[0197] While the description above shows a hair iron with an asymmetrical design, the shape can be modified depending on the intended use. For example, a straightener can be made basically symmetrical.

[0198] Example 3 Next, we investigated the effect of applying a permanent wave agent to the hair iron of the present invention. Specifically, we investigated whether it is possible to form and fix curls in the hair by heating only one side of the hair iron of the present invention and combining the hair iron with a permanent wave agent.

[0199] <Curl formation in perm wave solutions and hair iron treatments> Approximately 1g of 100% human black hair (product number: BS-BA, manufactured by Beaulux Co., Ltd.) was used as the hair bundle for evaluating curl formation. The curl formation state was confirmed using the following method.

[0200] Black hair strands were washed with our shampoo (product name: Nano Suppli Cleansing Shampoo OT), rinsed with warm water, and towel-dried. Next, 3g of the permanent wave agent from Formula Example 1 was applied to the hair strands and left at room temperature for 10 minutes. Table 5 shows the contents of the permanent wave agent from Formula Example 1.

[0201] [Table 5]

[0202] In the permanent wave agent of Formulation Example 1, ammonium thioglycolate and thioglycerin were used as reducing agents, aqueous ammonia, sodium hydroxide, sodium bicarbonate, and ammonium bicarbonate were used as alkaline agents, cetyltrimethylammonium chloride was used as a cationic surfactant, concentrated glycerin was used as a wetting agent, and tetrasodium edetate tetrahydrate was used as a chelating agent.

[0203] Afterward, the hair was rinsed with warm water, washed with our oolong shampoo, and dried with a hairdryer. Then, the newly developed hair iron (single-heat iron) was set to 180°C and passed through the hair strands five times. Subsequently, 3g of the hair setting agent from Formulation Example 2 was applied to the hair strands and left at room temperature for 10 minutes. Table 6 shows the contents of the hair setting agent from Formulation Example 2.

[0204] [Table 6]

[0205] Furthermore, in the hair styling agent of formulation example 2, sodium bromate was used as an oxidizing agent, cetyltrimethylammonium chloride as a cationic surfactant, and disodium edetate as a chelating agent.

[0206] Finally, the hair was rinsed with warm water and dried with a hairdryer. Curl formation was assessed by measuring the length of the hair strands before and after the permanent wave solution and hair iron treatment. The results are shown in Table 7.

[0207] [Table 7]

[0208] The more curl is formed, the shorter the length of the hair strands becomes. As a result, it was found that excellent curl formation could be obtained with both single-sided and double-sided heating irons. Although both were good, in the combination of permanent wave solution and hair iron, it was found that single-sided heating irons were able to form curls better than double-sided heating irons.

[0209] Example 4 <Hair moisture content after ironing> A hair bundle of 100% human black hair (product number: BS-BA, manufactured by Beaulux Co., Ltd.), weighing approximately 1g, was used as the hair moisture content measurement bundle. The moisture content was confirmed using the following method.

[0210] The hair iron (single-heat iron) of the present invention was set to 180°C and passed through a strand of black hair three times. The treated strand was cut into 5mm wide strips and its weight was measured. The cut hair was dried at 65°C for 40 minutes and its weight was measured. Subsequently, it was dried at 180°C for 30 minutes and its weight was measured again. The moisture content was calculated from the weight before drying and the weight after drying at 180°C. The results are shown in Table 8.

[0211] [Table 8]

[0212] Table 8 and Figure 4 show that hair strands treated with a single-heat iron had a higher moisture content than hair strands treated with a double-heat iron. With a double-heat iron, heat is applied to the hair from both sides, causing moisture to escape easily. On the other hand, with a single-heat iron, heat is applied to the hair from only one side, making it less likely for moisture to escape. Also, water droplets form when the iron is passed over the hair. While the moisture in the hair heated by the heating plate evaporates, it is cooled by the non-heating plate and forms water droplets without evaporating. Therefore, the water droplets return to the hair, providing moisture. It was found that the newly developed hair iron (single-heat iron) can suppress moisture evaporation from the hair, allowing for curls while retaining moisture.

[0213] Furthermore, in this invention, by changing the plate shape, it is possible to straighten hair, even though some conventional hair straighteners are not capable of doing so. It has also been found that, in the treatment of using a hair iron and permanent wave solution, a single-sided heating iron is more effective at creating curls than a double-sided heating iron.

[0214] Furthermore, in the above explanation, as an example of an alternative embodiment, an example was shown in which one of the processing surfaces (clamping surfaces) is rounded and the other is flat, with the rounded side being the heating element. However, in this embodiment, a hair iron (see Figure 6) was used in which both sides are plates of the same shape, with about 3 / 4 being flat and the remaining 1 / 4 being gently curved. When gripping the hair iron used in this embodiment in the same way as in the example where the rounded side is the heating element, the heating element is located on the opposite side compared to the example where the rounded side is the heating element. To move the hair iron in the same way, the iron will need to be flipped over and gripped.

[0215] In this embodiment, it is possible to efficiently form curls even when using a hair iron with flat plates as shown in Figure 6. Generally, even with flat plates, it is possible to create some curls with the stylist's technique, but the hair tends to get caught between the flat plates, which straightens it first and makes it difficult to curl. However, surprisingly, according to the present invention, it is possible to form curls even with such flat plates. [Explanation of Symbols]

[0216] 1. First Arm 2. Second Arm 3. First clamping surface 4. Second clamping surface 5. Hydrogen peroxide reduction device 6. Temperature control device 7. Connecting Members 8. Connecting Members 9 switches 15,17 Proximal end 19 Rotation axis 21,23 Gripping part 25,27 Point of force 29,31 Tip side 33 One side of the tip, 29, 31 35 One side of the gripping parts 21, 23 37 Both sides 33,35 are inclined surfaces 39 Other surfaces of the tip sides 29, 31 50 Core material 51 Plates and others 60 Plate (Heating Section) 61. Ceramic heater (heat source) 62 Mica plate 63 Bimetal 64 Bimetal presser foot 65. Leaf spring for holding magnets in place 66 Plate spring (biasing part) 67 Magnets 70 Components within the plate 80 Bulge

Claims

1. A first arm and a second arm are connected so as to be openable and closable, A first clamping surface provided on the inside of the first arm, A second clamping surface provided on the inside of the second arm, A hair iron having a heating element for heating hair, provided on either the first or second clamping surface.

2. The hair iron according to claim 1, characterized in that the surface of the heating element has a curved surface.

3. The hair iron according to claim 1 or 2, characterized in that the surface of the heating element has a substantially flat surface.

4. The hair iron according to claim 1, characterized in that the plate shape constituting the surface of the heating portion is different from or the same as the plate shape formed on the first or second clamping surface corresponding to the heating portion.

5. The hair iron according to claim 2, characterized in that the curved surface occupies a range of 1 / 2 to 1 / 4 of the entire surface of the heating portion.

6. The hair iron according to claim 1, characterized in that the heating element has a layer made of at least platinum.

7. The hair iron according to claim 1, characterized in that the heating element further has a layer made of at least one of nickel, copper, electroless nickel, or aluminum.

8. The hair iron according to claim 6, characterized in that the thickness of the platinum layer is 0.05 to 1.0 μm.

9. The hair iron according to claim 1, characterized in that the surface of the heating element is polished with a buff.

10. The hair iron according to claim 1, characterized in that the first and / or second arm is equipped with a hydrogen peroxide reduction device.

11. Furthermore, the hair iron according to claim 1 or 10 is characterized in that the first and / or second arm is provided with a temperature control device.

12. The hair iron according to claim 10, characterized in that the hydrogen peroxide reduction device reduces hydrogen peroxide by setting a temperature.

13. The hair iron according to claim 12, characterized in that the temperature is 80°C or higher.

14. The hair iron according to claim 12, characterized in that the temperature is 140°C to 180°C.

15. Furthermore, the hair iron according to claim 1 is characterized by having a connecting member that connects the first arm and the second arm.

16. The hair iron according to claim 10, characterized in that the hydrogen peroxide reduction device and the temperature control device are integrated.

17. The hair iron according to claim 1, characterized in that the first and / or second arm is provided with switches for the hydrogen peroxide reduction device and the temperature control device.

18. The hair iron according to claim 15, characterized in that the connecting member is one or more.

19. The heating section is a first processing section having a heating plate, wherein the surface of the first processing section is provided with a first processing surface that is a convex curved surface and has a protruding ridge, located in the intermediate part of the surface between the two edges of the heating plate. The other side of the first processing unit is provided with a second processing surface which is a plane that can locally hold hair between itself and the first processing surface, or a concave surface with a curvature smaller than that of the first processing surface. The hair iron according to claim 1, characterized in that a heater is placed behind the convex curved surface.

20. The hair iron according to claim 19, characterized in that each of the processing units is temperature-controlled so as to create a temperature difference between the first and second processing surfaces.

21. The hair iron according to claim 20, characterized in that the temperature control is performed within a temperature range of 120°C to 180°C.

22. The hair iron according to claim 20, characterized in that the temperature control is performed only on the first processing surface within the range of 120°C to 180°C.

23. A method for perming hair with an iron, comprising the steps of: applying a permanent wave agent comprising a reducing agent, an alkaline agent, a surfactant, a chelating agent, and a conditioning agent; and performing an iron perm treatment after applying the permanent wave agent.

24. The iron perm method according to claim 23, characterized in that the iron perm treatment is performed using a hair iron as described in any one of claims 1 to 22.

25. The iron perm method according to claim 23, characterized in that the permanent wave agent further contains at least one of a hair protectant, a fragrance, a reaction modifier, or an anti-inflammatory agent.

26. The iron perm method according to claim 23, further comprising the step of applying a hair setting agent after the step of performing the iron perm treatment.

27. The hair styling agent contains an oxidizing agent, a conditioning agent, a chelating agent, and a surfactant, as described in claim 26.

28. The iron perm method according to claim 23 or claim 27, wherein the conditioning agent is at least one selected from hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, amodimethicone, propylene glycol, 1,3-butylene glycol, glycerin, and sorbitol.

29. The iron perm method according to claim 28, wherein the cationized polymer is at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

30. The iron perm method according to claim 25, wherein the hair protective agent is at least one selected from the group consisting of hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hydrolyzed large soy protein, hydroxyethylcellulose, cationized polymer, dimethicone, and amodimethicone.

31. The iron perm method according to claim 30, wherein the cationized polymer is at least one selected from the group consisting of polyquaternium-10, polyquaternium-6, polyquaternium-7, polyquaternium-11, polyquaternium-22, polyquaternium-37, and polyquaternium-39.

32. The iron perm method according to claim 25, wherein the reaction modifier is dithiodiglycolic acid or ammonium dithiodiglycolic acid.

33. The iron perm method according to claim 25, wherein the anti-inflammatory agent is at least one selected from the group consisting of glycyrrhizic acid or its salts or derivatives, glycyrrhetinic acid or its salts or derivatives, and allantoin.

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