Hair iron

Abstract

To provide a hair iron capable of reducing damage of the hair.SOLUTION: A hair iron has: a first arm and a second arm openably / closably coupled; a first holding surface provided inside the first arm; a second holding surface provided inside the second arm; and a heating part for heating the hair provided on the first and the second holding surfaces. The heating part has a layer composed at least of platinum.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a hair iron, and more particularly to a hair iron capable of reducing hair damage.

Background Art

[0002] Generally, a hair iron is 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 tip with the hair pinched 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 a 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) is characterized by having a comb (19) positioned upstream or downstream of one of the surfaces (5, 6) of the arms (3, 4) (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] However, in the prior art including the above Patent Document 1, in order to increase the heat capacity, the thickness of the arm may be set thick, and in such a case, there is a problem that the overall size becomes large and the weight increases.

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

[0007] In such a case, after achieving the original purpose of the oxidizing agent or reducing agent, etc., on the contrary, there are cases where the hair is damaged. Although there have been attempts to reduce hair damage by using something that does not damage the hair as much as possible or avoiding long-term use, there have been cases where it has not been fully achieved.

[0008] For example, hydrogen peroxide used as a bleaching agent can provide good coloring, but it also acts on keratin, which is the main component of hair, and as a result of decomposition, it has a problem of damaging the hair.

[0009] Also, in the prior art, many are for the purpose of stretching out frizzy hair, etc., and even permanent waves by curling have not been considered. Furthermore, when curling or the like as described above, if the adhesion between the arms is good, the treatment can be performed more appropriately.

[0010] Therefore, an object of the present invention is to provide a hair iron capable of improving the adhesion between the arms.

Means for Solving the Problems

[0011] In order to achieve the above object, the inventors of the present invention have intensively studied the hair iron and as a result, have found the present invention.

[0012] That is, the hair iron of the present invention includes a first arm and a second arm that are connected so as to be openable and closable, a first clamping surface provided inside the first arm, a second clamping surface provided inside the second arm, and a heating unit for heating hair provided on the first and second clamping surfaces. The heating unit is characterized by having a layer made of at least platinum.

[0013] Further, in a preferred embodiment of the hair iron of the present invention, the heating unit further has a layer made of at least one of nickel, copper, electroless nickel, or aluminum.

[0014] Further, 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.

[0015] Further, in a preferred embodiment of the hair iron of the present invention, the surface of the heating unit is buffed.

[0016] Further, 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.

[0017] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is further provided with a temperature control device.

[0018] Further, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device reduces hydrogen peroxide according to a temperature setting.

[0019] Further, in a preferred embodiment of the hair iron of the present invention, the temperature is 80°C or higher.

[0020] Further, in a preferred embodiment of the hair iron of the present invention, the temperature is characterized by being 140°C to 180°C.

[0021] Further, 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.

[0022] Further, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reducing device and the temperature control device are integrated.

[0023] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is provided with a switch for the hydrogen peroxide reducing device and the temperature control device.

[0024] Further, in a preferred embodiment of the hair iron of the present invention, the connecting member is one or more.

[0025] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm has a biasing portion that biases the clamping surface and elastically adjusts the clamping state between the clamping surfaces.

[0026] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is internally provided with a core material along the longitudinal direction.

[0027] Further, in a preferred embodiment of the hair iron of the present invention, the core material has a stopper portion that engages the clamping surface and restricts movement in the protruding direction with respect to the first and / or second arm.

[0028] Further, in a preferred embodiment of the hair iron of the present invention, at least one of the edges of the heating portion in the hair insertion direction has a curl forming curved surface that is curved in the thickness direction of the heating portion.

[0029] Further, in a preferred embodiment of the hair iron of the present invention, the tip-side hair insertion direction edge of the first arm and / or the second arm has a curved surface.

[0030] Further, in a preferred embodiment of the hair iron of the present invention, it further has the curl-forming curved surface and / or a plane continuous with the curved surface.

Advantages of the Invention

[0031] According to the hair iron of the present invention, there is an advantageous effect that it is possible to provide a hair iron capable of improving the adhesion between the arms. Further, according to the hair iron of another aspect of the present invention, there is an advantageous effect that it is possible to reduce damage to the hair.

[0032] Further, according to the hair iron of the present invention, when gripping and operating the gripping portion at the middle portion of the clamping arm, the proximal ends rotate relative to each other, and the distal ends can perform a clamping operation, and by this clamping operation, the hair can be clamped and corrected by the clamping surface (also referred to as a correcting body) disposed opposite to the distal end side of the clamping arm.

[0033] Further, according to the hair iron of the present invention, when curling the hair, the hair can be sufficiently curled by sufficiently contacting the curl-forming curved surface.

Brief Description of the Drawings

[0034]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0035] The hair iron of the present invention includes a first arm and a second arm that are connected so as to be openable and closable, a first clamping surface provided inside the first arm, a second clamping surface provided inside the second arm, and a heating unit for heating the hair provided on the first and second clamping surfaces. The heating unit is characterized by having at least a layer made of platinum. In the present invention, it is sufficient that the first arm and the second arm are connected so as to be openable and closable, and they are not particularly limited. In the present invention, it is possible to sandwich the hair using the first clamping surface provided inside the first arm and the second clamping surface provided inside the second arm. By the heating unit for heating the hair provided on the first and second clamping surfaces, it is possible to treat the hair through both clamping surfaces.

[0036] Further, in a preferred embodiment of the hair iron of the present invention, the heating unit further has a layer made of at least one of nickel, copper, electroless nickel, or aluminum from the viewpoint of improving the adhesion to platinum. In the heating unit, the outermost platinum can be in direct contact with the hair. Regarding the order of the layers, in the case of aluminum and platinum, there is a risk of insufficient adhesion, and the adhesion can be improved by sandwiching nickel, copper, and nickel in between. Also, in the combinations of aluminum and copper, and platinum and copper, there is a risk of insufficient adhesion. When using all the materials, it is preferably in the order of platinum, nickel, copper, electroless nickel, and aluminum.

[0037] Note that, as shown in FIG. 12 described later, strictly speaking, the heating unit is composed of a plate, and it can be configured to have a heating source such as a ceramic heater in the layer below the plate. These heating units (plates) can have, for example, the shape shown in FIG. 12 as described later.

[0038] Further, in a preferred embodiment of the hair iron of the present invention, from the viewpoints of cost reduction and improvement of adhesion, the thickness of the platinum layer is characterized by being 0.05 to 1.0 μm. That is, if it is outside this range, there is a risk that the corners will bulge, and the adhesion between the plates may become poor.

[0039] Further, in a preferred embodiment, the thickness of the nickel layer is preferably 1 to 20 μm, more preferably 5 to 10 μm. Further, in a preferred embodiment, the thickness of the copper layer is preferably 1 to 10 μm, more preferably 2 to 5 μm. Further, in a preferred embodiment, the thickness of the electroless nickel layer is preferably 1 to 10 μm, more preferably 3 to 5 μm. Further, in a preferred embodiment, the thickness of the aluminum layer is preferably 0.1 to 10 μm, more preferably 1 to 3 μm.

[0040] Further, in a preferred embodiment of the hair iron of the present invention, the surface of the heating part is characterized by being buffed. For example, by buffing the surface of the aluminum plate constituting the heating part to make it smoother, it is possible to eliminate unevenness in the layer formed thereon, for example, the platinum layer. Furthermore, by buffing in this way, it is possible to improve the adhesion when the plates plated up to the platinum layer are joined together. Note that deburring may be performed at the four corners of the plate.

[0041] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is provided with a hydrogen peroxide reducing device. Thereby, in the present invention, for example, it is possible to efficiently remove the excess hydrogen peroxide used in the bleaching agent, and thus it is possible to minimize the damage to the hair. The hydrogen peroxide reducing device only needs to be installed on the arm, and the location and the like are not particularly limited. In a preferred embodiment, from the viewpoint of avoiding the clamping surface that is expected to be heated to a high temperature by the heating part, it can be installed at any location from the central part of the arm to the handle side of the arm.

[0042] Further, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reducing device is characterized in that it reduces hydrogen peroxide according to a temperature setting. In a preferred embodiment of the hair iron of the present invention, from the viewpoint that the temperature is such that hydrogen peroxide begins to be reduced, the temperature is 80°C or higher. Further, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of more efficiently reducing hydrogen peroxide, the temperature is 140°C to 180°C.

[0043] Also, in a preferred embodiment of the hair iron of the present invention, further, the first and / or second arm is provided with a temperature control device. The temperature setting device only needs to be installed on the arm, and the location and the like are not particularly limited. In a preferred embodiment, from the viewpoint of avoiding the clamping surface that is expected to be heated to a high temperature by the heating part, it can be installed at any location from the central part of the arm to the handle side of the arm.

[0044] In some cases, a temperature control device is installed in the middle part of the power cord extending from the hair iron body. In this case, when turning the power on and off, it is necessary to operate by pulling the cord. On the other hand, in the present invention, a hydrogen peroxide reducing device and a temperature control device are installed inside the arm. As will be described later, if a switch function is installed inside the arm, the hair iron can be turned on and off while being held in the right hand, and if a dial-shaped adjustment mechanism is used, the adjustment of hydrogen peroxide and the temperature adjustment can also be easily turned with the thumb on the dial, so it is possible to improve the operability.

[0045] Further, 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. By the connecting member connecting both arms between both arms, it is possible to achieve the role of suppressing the shake of the tip portion of the iron (that is, the left - right shake when viewed from the tip side of the iron). Specifically, when pressing the iron, it is possible to make the plate surfaces fit without shifting. Further, in a preferred embodiment of the hair iron of the present invention, the connecting member is one or more from the viewpoint of operability.

[0046] Also, in a preferred embodiment of the hair iron of the present invention, the hydrogen peroxide reduction device and the temperature control device are integrated from the viewpoint of operability. Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is provided with switches for the hydrogen peroxide reduction device and the temperature control device. As described above, in some cases, the temperature control device is installed in the middle of the power cord coming out of the hair iron body. In this case, when turning the power on / off, it is necessary to operate by pulling the cord. On the other hand, in the present invention, since the hydrogen peroxide reduction device and the temperature control device are installed inside the arm and can also be provided with switches, it is possible to improve the operability.

[0047] Note that before applying the hair iron, a bleaching treatment or the like may be performed. The treatment with the bleaching agent is to soften the hair using an alkaline agent. The main components of the bleaching agent are hydrogen peroxide solution and ammonia water (an alkaline substance). Ammonia water acts on the cuticle on the hair surface to swell and soften the hair. Hydrogen peroxide penetrates into the swollen and softened hair, and hydrogen peroxide chemically reacts with melanin. When bleaching black hair with a bleaching agent, it changes from reddish - brown → orange color with strong redness → orange color with strong yellowness → yellow depending on the application time. This is mainly because the black - brown "eumelanin" is decomposed, and the orange - red "pheomelanin" is difficult to decompose.

[0048] However, hydrogen peroxide oxidizes not only melanin. That is, it has the potential to decompose keratin, which is the main component of hair, and damage the hair.

[0049] In the present invention, it is possible to minimize damage to the hair by quickly removing the hydrogen peroxide.

[0050] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm has a biasing portion that biases the clamping surface and elastically adjusts the clamping state by the clamping surfaces. When the gripping portion in the middle of the first and / or second arm is gripped and operated, the proximal ends of the first and / or second arms rotate relative to each other, and the distal ends of the first and / or second arms (also referred to as the first and / or second clamping arms) can perform a clamping operation. By this clamping operation, the hair can be clamped and corrected by the clamping surfaces (clamping surfaces) arranged opposite to the distal ends of the arms.

[0051] Further, at least one of the clamping surfaces can be movably supported on the clamping arm so as to be movable back and forth with respect to the other side, and the clamping arm can be provided with a biasing portion that biases the clamping surfaces and elastically adjusts the clamping state by the clamping surfaces. Thereby, the hair can be reliably clamped by the clamping surfaces. The biasing portion is not particularly limited, and for example, a spring, a leaf spring, a spring, rubber, etc. can be used. Note that the biasing portion, for example, a spring or the like, may separate the spring that presses the bimetal type temperature fuse from the magnet pressing leaf spring to increase the holding force. This makes it possible to more accurately sense the transmission of temperature.

[0052] Further, in a preferred embodiment of the hair iron of the present invention, the first and / or second arm is characterized in that a core material is installed along the longitudinal direction.

[0053] Then, a core material is installed so that its longitudinal direction extends from the tip side of the arm to at least the gripping portion. The core material maintains its hardness up to a temperature higher than that of the clamping arm, and can restrict easy deformation due to heat on the tip side of the clamping arm when heat is generated by the heating portion of the clamping surface. Therefore, by gripping the gripping portion of the clamping arm, force can be smoothly transmitted from the tip side of the clamping arm to the clamping surface, and the hair can be reliably clamped and corrected.

[0054] Therefore, even if the clamping arm is made thin-walled and its heat capacity is reduced, reliable hair clamping and correction can be achieved. By overall weight reduction, it becomes easy to hold the clamping arm and continuously stretch fine frizzy hair for a certain period of time by a free operation.

[0055] Also, a receiving portion capable of supporting the biasing portion can be partially provided on the core material so as to face the back portion of the biasing portion. Thereby, the clamping reaction force by the clamping surface can be received by the receiving portion via the biasing portion, and the hair can be more reliably clamped and corrected by the clamping surfaces.

[0056] Note that since the receiving portion can be partially provided, its shape is less likely to be affected by the curved shape on the clamping arm side, etc., and the receiving portion can be easily arranged on the back portion of the biasing portion.

[0057] Also, in a preferred embodiment of the hair iron of the present invention, the core material has a stopper portion that engages with the clamping surface to restrict movement in the protruding direction with respect to the first and / or second arm. That is, the movement of the clamping surface in the protruding direction with respect to the clamping arm can be restricted by engaging with the stopper portion. Therefore, rattling of the clamping surface with respect to the clamping arm can be restricted, and hair clamping and correction by the clamping surfaces can be performed more accurately.

[0058] Also, in a preferred embodiment, the clamping arm can be made divisible. That is, the arm can be made into an assembled structure in which the divided parts are joined to each other by a fastener, and the core material can be preliminarily joined to one of the divided parts by a temporary fixing part provided at one end in the longitudinal direction. Therefore, when the divided parts are put together and joined to each other by a fastener, there is no need to handle the core material individually, and a predetermined portion of the core material can be joined to the clamping arm by co-fastening together with the fastening of the divided parts. For this reason, when joining the divided parts to each other, there is no need to handle the core material individually, and it is also possible to easily assemble the clamping arm.

[0059] Further, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of curling the hair, at least one of the edges in the hair insertion direction of the heating part has a curl forming curved surface curved in the thickness direction of the heating part. The clamping surfaces include heating parts facing each other, and at least one of the edges in the hair insertion direction of the heating part can be provided with a curl forming curved surface curved in the thickness direction of the heating part. It is also possible to provide a winding surface of a curved surface and / or a flat surface for winding the hair on at least one of the edges in the hair insertion direction on the tip side of the clamping arm.

[0060] It is also possible to make the hair wound around the curl forming curved surface extend linearly from the curl forming curved surface and contact the curved surface or the flat surface of the winding surface. Thereby, when curling the hair, the hair can be sufficiently in contact with the curl forming curved surface, so that more sufficient curling can be performed.

[0061] Moreover, when tension is applied to the hair by winding it around the clamping arm and the hair is pressed against the curl forming curved surface, the hair can be easily slid on the curved surface or the flat winding surface on the clamping arm side. Therefore, the tension applied to the hair by winding can be effectively used for pressing against the curl forming curved surface, and more sufficient curling can be performed.

[0062] Further, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of performing curling with different curls, the tip-side hair insertion direction edges of the first arm and / or the second arm have a curved surface.

[0063] In the present invention, the clamping surface includes a heating portion having mutually opposing correction surfaces, and in addition to being able to provide curling curved surfaces curved in the thickness direction of the heating portion at both hair insertion direction edges of the heating portion, it is possible to provide winding surfaces that are curved surfaces or flat surfaces for winding the hair at both hair insertion direction edges on the tip side of the clamping arm.

[0064] Thereby, since the degree of winding of the hair around the two curling curved surfaces is changed, it is possible to easily perform curling with different curls.

[0065] Also, in a preferred embodiment of the hair iron of the present invention, from the viewpoint of being able to accurately clamp and correct the hair and also accurately perform curling, further, the curling curved surface and / or a plane continuous with the curved surface are provided.

[0066] 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 with respect to the other side, and an urging portion can be provided on the clamping arm to urge the clamping surface forward and elastically adjust the clamping state by the clamping surfaces. Further, in addition, when the clamping surface retracts, the hair wound around the curling curved surface has the curling curved surface and / or a plane continuous with the curved surface, that is, it extends linearly from the curling curved surface and contacts the curved surface or plane of the winding surface, so that the hair can be accurately clamped and corrected by the oppositely arranged and retractable clamping surfaces, and curling can also be accurately performed.

[0067] In the present invention, the winding surface has a plane orthogonal to the clamping surface (correction surface). Since the plane of the winding surface and the curl-forming curved surface are close in the protruding position in the hair insertion direction, the tension applied to the hair by winding can be utilized straight as a pressing force on the curl-forming curved surface by sliding the plane of the winding surface, and the curling can be made more reliable and easier.

[0068] In addition, in the present invention, it is possible to improve and correct the plate, arm, cord, temperature control, magnet, etc. For example, the plate plating thickness can be corrected in order to improve the responsiveness during hair setting. Also, a stopper for preventing the arm from slipping sideways may be provided from the viewpoint of preventing sideways slippage. Also, an AC cord may be provided from the viewpoint of preventing disconnection. Furthermore, painting (three layers) can be performed from the viewpoints of preventing peeling, chemical resistance, and color matching. In addition, from the viewpoints of heat resistance and magnetic force, a magnet may be used in the configuration between the biasing portion and the plate.

[0069] Also, from the viewpoint of shortening the time to reach the set temperature, it is also possible to perform temperature control. From the viewpoint of strength, a reinforcing plate shape may be adopted.

[0070] Mechanically, a platinum plate + heat-dissipating silicon + ceramic heater + mica plate + heat-resistant magnet + magnet pressing metal fitting + plate pressing metal fitting exist inside the upper and lower cases of the hair iron body, and for control, a thermistor + bimetal type temperature fuse + PCB unit, etc. can be provided. Furthermore, various actions are generated on various molecules such as water molecules due to magnetism, temperature, platinum components, etc., and it is possible to create a better effective situation by a composite differential effect.

Example

[0071] Hereinafter, an example using the hair iron of the present invention will be described, but the present invention is not construed as being limited to the following examples.

[0072] Example 1 Figure 2 shows a hair iron according to an 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 a hydrogen peroxide reduction device, 6 is a temperature control device, 7 is a connecting member, 8 is a connecting member, and 9 is a switch, respectively. The case of using this hair iron for ironing will be briefly described as follows. Insert the power plug into the outlet, and heat the clamping surfaces (3, 4) with a heater (heating source). By the clamping operation of the first and second arms, the hair is clamped between the clamping surfaces (3, 4), and by heating with the heating part, the hair iron can be applied along the treatment surface of the clamping surfaces (3, 4) to the clamped hair. In this example, the hydrogen peroxide reduction device 5 is installed inside the arm, and the switch 9 function is also installed inside the arm. Therefore, it is possible to turn the hair iron on and off while holding it in the right hand. Also, in this example, the hydrogen peroxide reduction device 5 and the temperature control device 6 are integrated and have a dial-shaped adjustment function. Therefore, the adjustment of hydrogen peroxide and the temperature can be easily turned with the thumb on the dial, so it is possible to improve the operability. Note that the temperature adjustment of the hydrogen peroxide reduction device 5, the temperature control device 6, etc. is not limited to a dial shape, and can be performed by a push button, a lever, etc., and is not particularly limited.

[0073] In addition, as a hair iron equipped with a "hydrogen peroxide removal" mode, it is also possible to provide a mode called "hydrogen peroxide removal" at the dial position of the iron and set it to 150°C.

[0074] Figure 3 is a view showing a top view of a hair iron according to an embodiment of the present invention. In the figure, 33 is one surface of the tip sides 29, 31, 35 is one surface of the gripping parts 21, 23, 37 is the inclined surface of both surfaces 33, 35, and 39 is the other surface of the tip sides 29, 31, respectively.

[0075] Figure 4 is a view showing a state (the state of the back side before assembly) in which Figure 5 of the hair iron according to an embodiment of the present invention is inverted.

[0076] FIG. 5 is a bottom view of a hair iron according to an embodiment of the present invention. In the figure, 33 represents one surface of the tip sides 29 and 31, 35 represents one surface of the gripping portions 21 and 23, 37 represents the inclined surface of both surfaces 33 and 35, and 39 represents the other surface of the tip sides 29 and 31, respectively.

[0077] FIG. 6 is a view showing a state in which FIG. 3 of the hair iron according to an embodiment of the present invention is inverted (the state of the back side before assembly).

[0078] Further, FIG. 7 shows a hair iron according to an embodiment of the present invention. In the figure, 3 represents the first clamping surface, 4 represents the second clamping surface, 15 and 17 represent the base end sides, 19 represents the rotation axis, 21 and 23 represent the gripping portions, 25 and 27 represent the force points, and 29 and 31 represent the tip sides, respectively.

[0079] FIG. 8 is a perspective view of a case portion of the upper body for vertical assembly of a hair iron according to an embodiment of the present invention. The plate and the core material constituting the heating portion and the like are schematically illustrated. In the figure, 50 represents the core material, 51 represents the plate and others, respectively.

[0080] FIG. 16 is a side view of a case portion of the upper body for vertical assembly of a hair iron according to an embodiment of the present invention. The plate and the core material constituting the heating portion and the like are schematically illustrated. In the figure, 50 represents the core material, 51 represents the plate and others, respectively.

[0081] FIG. 10 is a perspective view of a case portion of the lower body for vertical assembly of a hair iron according to an embodiment of the present invention. The plate and the core material constituting the heating portion and the like are schematically illustrated. In the figure, 50 represents the core material, 51 represents the plate and others, respectively.

[0082] FIG. 11 is a side view of a case portion of the lower body for vertical assembly of a hair iron according to an embodiment of the present invention. The plate and the core material constituting the heating portion and the like are schematically illustrated. In the figure, 50 represents the core material, 51 represents the plate and others, respectively.

[0083] FIG. 12 schematically shows the configuration from a heating part etc. to a biasing part in a hair iron according to an 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 magnet retainer, 66 is a leaf spring for plate (biasing part), and 67 is a magnet, respectively shown. FIG. 12(a) shows a perspective view of the plate, FIG. 12(b) shows the plate and the members inside the plate, FIG. 12(c) shows a cross-sectional view of the plate and the members inside the plate, and FIG. 12(d) shows an example of the configuration of the members inside the plate. The plate is formed using an aluminum base as shown in FIG. 12(a), and can be plated, for example, in the order of electroless nickel, copper, nickel, and platinum thereon. As shown in FIG. 12(b), inside the plate, members such as a ceramic heater (heating source) 61, a mica plate 62, a bimetal 63, a bimetal retainer 64, a leaf spring for magnet retainer 65, a leaf spring for plate (biasing part) 66, and a magnet 67 can be arranged, for example, as shown in FIG. 12(d). As shown in the figure, since the spring is changed and the spring that presses the bimetal type temperature fuse is separated from the magnet retainer leaf spring, it becomes possible to improve the holding force more. Also, with these configurations, it is also possible to more accurately sense the transmission of temperature.

[0084] As shown in these figures, the hair iron includes an iron body to which a power cord is connected. Note that the power cord may be provided with a temperature control device, a power plug, etc.

[0085] Next, an embodiment of a hair iron having a biasing part, a core material, a stopper part, etc. will be described.

[0086] The iron body includes a pair of clamping arms and a pair of clamping surfaces 3 and 4. The clamping arms are made of resin such as a semi-aromatic polyester-based engineering plastic with a linear expansion coefficient of 8.8×10-5 cm / cm / ℃, and the proximal ends 15 and 17 can be rotatably coupled to each other by a rotating shaft 19. Gripping portions 21 and 23 are provided at the middle portions of the respective clamping arms. These gripping portions 21 and 23 are formed relatively thick as shown in FIG. 7 for easy gripping and can have substantially the same thickness as the proximal ends 15 and 17.

[0087] The gripping portions 21 and 23 are provided with force application points 25 and 27 formed as inclined surfaces on their distal ends. These force application points 25 and 27 are for applying force by placing the thumb or index finger when gripping the gripping portions 21 and 23. The force application points 25 and 27 are formed to be slightly thicker than the entire gripping portions 21 and 23 when viewed from the side in FIG. 7, making it easier to place the thumb or index finger.

[0088] The distal ends 29 and 31 of the clamping arms are formed thinner in the direction of mating with each other than the gripping portions 21 and 23 as shown in FIG. 7. Also, the distal ends 29 and 31 are formed thinner than the gripping portions 21 and 23 and are set to be displaced to one side with respect to the gripping portions 21 and 23 as shown in FIG. 3. Therefore, one surface 33 of the distal ends 29 and 31 protrudes to one side more than one surface 35 of the gripping portions 21 and 23, and the two surfaces 33 and 35 are continuously set stepwise by an inclined surface 37. The other surface 39 of the distal ends 29 and 31 is formed to be displaced to one side in accordance with the one surface 33 and enters the central side of the gripping portions 21 and 23.

[0089] Such clamping arms are formed in a hollow shape, and split portions can be provided from the central portion, and they may have a mating structure. These split portions can be fastened and coupled to each other by, for example, screws, which are fasteners, at the distal ends 29 and 31, the gripping portions 21 and 23, and the proximal ends 15 and 17. Although not shown, fastening holes may be formed through the split portions at the distal ends 29 and 31.

[0090] Although not shown, a plurality of reinforcing ribs may be provided in the hollow gripping portions 21 and 23. A convex portion may be provided on one of the clamping arms on the side facing the other arm, and a concave portion into which the convex portion fits may be provided on the other clamping arm. The convex portion may abut against the bottom surface of the concave portion to function as a stopper.

[0091] In this way, the clamping arms are configured such that the proximal ends 15 and 17 are rotatably coupled to each other, and the distal ends 29 and 31 perform a clamping operation by operating the gripping portions 21 and 23 in the middle portion.

[0092] In the following description, since the distal ends 29 and 31 of the clamping arms have a symmetrical shape, the distal end 29 will be described, and the other distal end 31 will refer to the description of the distal end 29.

[0093] The distal end 29 can be provided with a flat vertical wall surface and a flat bottom wall surface for accommodating a core material inside. Further, a clamping surface support hole for movably supporting the clamping surface 3 so as to be movable forward and backward with respect to the other side may be provided at the distal end 29. The clamping surface 3 can be movably supported in the clamping surface support hole.

[0094] Therefore, the clamping surfaces 3 and 4 are disposed opposite to the distal ends 29 and 31 of the clamping arms, and are configured to perform clamping correction while heating the hair by the clamping operation of the clamping arms.

[0095] The clamping surface 3 is composed of, in order from the side of the clamping surface, a heating portion, a ceramic heater, a magnet plate, a first spring, and a second spring. A housing portion is integrally provided behind the heating portion, and the housing portion can accommodate a ceramic heater, a magnet plate, and a first spring. Further, the first spring and the second spring can fix the housing portion to the heating portion and the arm in a form of pressing the housing portion in the direction of the hair contact surface.

[0096] The heating portion is formed in a rectangular plate shape as viewed from the opposite side by a material such as aluminum that is lightweight and has a high thermal conductivity, and the surface is fluorine-coated.

[0097] In addition, convex portions can be provided on the upper and lower walls of the housing portion to restrict the protruding movement of the heating portion by a certain amount or more.

[0098] The ceramic heater is in the shape of a rectangular plate, generates heat up to a maximum temperature of about 180°, conducts heat to the heating portion, and is electrically connected to the power cord side.

[0099] The magnet plate is formed in a rectangular plate shape by a neodymium magnet of 15,000 gauss or the like, and is arranged such that the S poles face each other between the two sandwiching surfaces 3 and 4.

[0100] In this aspect, one of the biasing portions is the first spring. The first spring is formed of a leaf spring, biases the magnet plate in the direction of the back surface of the heating portion within the housing portion to bring the ceramic heater into close contact with the back surface of the heating portion, and stably supports the magnet plate.

[0101] As another biasing portion, a second spring can be cited. The second spring is supported at the rear end of the housing portion, and this second spring constitutes a biasing portion that biases the sandwiching surfaces 3 and 4 to elastically adjust the sandwiching state between the sandwiching surfaces 3 and 4. In the aspect of being divided, the second spring is formed of a leaf spring, both ends of the leaf spring are inclined, and the edges can be engaged with the protrusions on the divided portion side in the left-right direction (longitudinal direction).

[0102] A core material is further accommodated inside the tip sides 29 and 31. This core material is formed in a symmetrical shape. One side of the core material will be described, and for the other core material, the description of one side of the core material will be referred to and omitted.

[0103] The core material is installed so that its longitudinal direction extends from the tip side 29 of the sandwiching arm at least to the gripping portion 21. However, it is also possible to configure the core material to be installed throughout the entire length from the tip side 29 to the base side 15 of the sandwiching arm.

[0104] The core material can maintain its hardness up to a temperature higher than that of the clamping arm and can restrict the thermal deformation of the clamping arm. Therefore, in the present embodiment, the core material is formed of stainless steel and is made of a material having a smaller linear expansion coefficient than the resin material of the clamping arm. However, the core material only needs to have a smaller linear expansion coefficient than the clamping arm and can also be formed of titanium, ceramic, super-emperor, or the like.

[0105] The core material can integrally provide fastening portions at both ends of the long plate-shaped base portion. These fastening portions can be fastened together along with the clamping of the divided portions. The fastening portion is provided with holes for inserting screws, which are fasteners, and the like are also provided with holes. A temporary fixing portion may be provided continuously at the end of the fastening portion. This temporary fixing portion is provided at one end in the longitudinal direction of the core material and is for preliminarily joining to the divided portion. This temporary fixing portion is provided with positioning holes that fit into the positioning pins protruding from the divided portion side. Further, the temporary fixing portion is provided with holes for inserting screws, which are temporary fixing fasteners.

[0106] A vertical wall portion is provided along one side edge of the long plate-shaped base portion. The vertical wall portion also serves as a stopper portion for the clamping surface 3. Another vertical wall portion is provided along the other side edge of the base portion and the other side edges of the fastening portion and the temporary fixing portion.

[0107] In an aspect of making the hair iron separable, first and second fastening wall portions may further protrude from the vertical wall portion. The first and second fastening wall portions may be installed near the center of the vertical wall portion having a U-shaped cross section. These first and second fastening wall portions are fastened and fixed to the divided portions of the arm. Also, the first fastening wall portion is located between both ends of the second spring. That is, the first fastening wall portion can constitute a receiving portion that faces the back of the second spring, which is a biasing portion, and can support the second spring.

[0108] Next, the case of stretching frizzy hair or straightening an artificial permanent wave using the hair iron will be described. Of course, it is also possible to apply a permanent wave with the hair iron.

[0109] First, when using the hair iron, first apply a liquid agent adjusted to pH 6 - 10 by adding a basic substance such as ammonia, monoethanolamine, or triethanolamine to an aqueous solution mainly composed of a mercapto compound (reducing agent) such as thioglycolic acid or cysteine to the hair. By this application, the disulfide bond of cystine contained in the keratin protein in the hair is reduced and cleaved into mercapto groups. Then, after washing the hair with water and sequentially drying it with a dryer or the like, the hair is straightened into straight hair using the hair iron 1 heated to 140 - 180°C.

[0110] Specifically, hold the gripping parts 21, 23 of the clamping arms, apply force by placing the thumb and index finger on the force points 25, 27, etc., and sandwich the hair between the heating parts of the clamping surfaces 3, 4. Then, while maintaining this state, slide the clamping arms toward the hair tips. As a result, the hair sandwiched between the heating parts heated by the ceramic heater is stretched while being heated.

[0111] At this time, since the hair moves at a predetermined speed between the magnet plates facing the S poles, reduction energy is generated according to Fleming's right - hand rule. This energy is generated from the S pole of the magnet plate where the electrons of the magnetic pole rotate clockwise, and it promotes the reducing action of the first liquid. Moreover, it also functions to close the cuticle that forms the surface layer of the hair. When the cuticle closes, it blocks the penetration of ultraviolet rays into the interior of the hair, preventing the hair from being damaged by ultraviolet rays.

[0112] Also, due to this reduction energy, the cluster of water in the first liquid becomes smaller. As this cluster becomes smaller, the permeability of the first liquid to the hair increases. Therefore, the reducing action of the first liquid is further promoted. As a result, the treatment time accompanied by the risk of hair damage can be shortened, and hair damage can also be suppressed.

[0113] Subsequently, a second liquid composed of an aqueous solution of an oxidizing agent such as sodium bromate and hydrogen peroxide is applied to the posterior hair. As a result, the mercapto group is oxidized to form a new disulfide bond in the hair, and this straight hair state can be fixed.

[0114] In such hair clamping correction, the heat of the ceramic heater is also conducted to the tip sides 29, 31 of the clamping arms, the hardness of the tip sides 29, 31 of the clamping arms decreases, and they become easily deformable.

[0115] Therefore, without the core material, when clamping the hair between the heating parts, due to the reaction force applied to the tip sides 29, 31 of the clamping arms, the tip sides 29, 31 may be easily deformed, and it may become impossible to evenly clamp the hair by the heating parts. In contrast, by providing the core material, such problems can be improved.

[0116] That is, the core material is installed at least from the tip sides 29, 31 to the gripping parts 21, 23, and the gripping part 21, 23 side maintains a temperature state that can be gripped by hand as compared with the tip sides 29, 31, and the core material can be firmly supported on the gripping part 21, 23 side.

[0117] And because the co-fastening part side of such a firmly supported core material is located within the force points 25, 27 of the gripping parts 21, 23, the force can be accurately transmitted from the force points 25, 27 to the core material.

[0118] By accurately transmitting the force to this core material, the clamping surfaces 3, 4 are supported by the core material, and easy deformation of the tip sides 29, 31 can be prevented. Therefore, the heating parts can be accurately opposed to each other to clamp the hair, and the above treatment can be accurately performed.

[0119] Also, in this embodiment, the clamping surfaces 3, 4 are urged by the second spring part which is an urging part, and the clamping state between the clamping surfaces 3, 4 is elastically adjusted, so that the above treatment can be performed more accurately.

[0120] The movement of the clamping surfaces 3 and 4 in the protruding direction can be restricted by the vertical wall portions (installed on the core material) serving as stopper portions, the rattling of the clamping surfaces 3 and 4 can be suppressed, the accurate advancing and retreating movements of the clamping surfaces 3 and 4 due to the biasing operation of the second spring portion can be maintained for a long time, and the accurate clamping state of the heating portion can be maintained accurately.

[0121] The second fastening wall portion serving as the receiving portion can receive the second spring portion by abutting both ends against the back of the second spring which is the biasing portion, and the reaction force of the second spring portion can be accurately applied to the heating portion.

[0122] Therefore, the clamping state between the clamping surfaces 3 and 4 by the second spring can be accurately maintained regardless of the heat rise on the tip sides 29 and 31. Moreover, since the first fastening wall portion serving as the receiving portion is partially provided on the core material, even in a form in which the clamping arm becomes thinner from the gripping portions 21 and 23 toward the tip sides 29 and 31, it can be formed without being affected by this shape. The base portion of the core material can be disposed on the flat bottom wall surface of the tip sides 29 and 31 (the flat portion corresponding to the bottom side in the cross section of the substantially trapezoidal tip sides 29 and 31), and can be arranged straight to the gripping portions 21 and 23 sides without difficulty.

[0123] Note that the present invention is not limited to the above-described embodiment. For example, one or both of the clamping surfaces 3 and 4 can be made fixed so as not to be movable with respect to the tip sides 29 and 31. The magnet plate and the first spring can also be omitted. The vertical wall portion, the first fastening wall portion, etc. of the core material can also be omitted.

[0124] Next, an aspect in an example of a hair iron having a curled curved surface, a curved surface, and a plane continuous with the curved surface will be described.

[0125] In such a manner, the following effects are achieved. That is, when tension is applied to the hair by winding around the clamping arm and the hair is pressed against the curl-forming curved surface, the hair can be easily slid on the curved surface or the like on the clamping arm side. Therefore, the tension applied to the hair by winding can be effectively utilized for pressing against the curl-forming curved surface, and sufficient curling can be performed.

[0126] Also, in another aspect, the curl-forming curved surfaces are provided at both ends of the hair insertion direction edge of the hot plate, the curved surfaces are provided at both ends of the hair insertion direction edge on the tip side of the clamping arm, and either one of the back surfaces of the hot plate is opposed to the curved surface on the tip side of the clamping arm, so that the winding degree of the hair around the two curl-forming curved surfaces can be changed, and thus, curling with different variations can be easily performed.

[0127] Also, in another aspect, at least one of the correcting members is supported by the clamping arm so as to be movable forward and backward with respect to the other side, and the clamping arm is provided with biasing means for biasing the correcting members to elastically adjust the clamping state between the correcting members. A plane continuous with the curved surface is provided on the tip side of the clamping arm, and when the correcting members are retracted, the hair wound around the curl-forming curved surface can extend linearly from the curl-forming curved surface and contact the curved surface or the plane. Therefore, the hair can be accurately clamped and corrected by the opposing and movable forward and backward correcting members, and curling can also be accurately performed.

[0128] Also, in another aspect, the plane continuous with the curved surface or the like is orthogonal to the correcting plane, and the interval between the plane and the curl-forming curved surface in the hair insertion direction is close. Therefore, the tension applied to the hair by winding can be directly utilized as a pressing force against the curl-forming curved surface by sliding on the curved surface or the plane, and curling can be performed more reliably and easily.

[0129] For other configurations, reference can be made to the description of the hair iron mentioned above. Below, the description will be focused on curved surfaces and the like. Also, although 29 and 31 exist on the tip side, since both tip sides 29 and 31 have a substantially symmetric cross-section and are rounded trapezoid shapes, for convenience, the tip side 29 on one side will be used for the description.

[0130] A flat correcting surface is provided on the heating part of the clamping surface 3. However, this correcting surface is not limited to being flat, and various shapes such as a curved surface and an S-shaped surface can be set. In addition, a correcting surface similar to the correcting surface is also formed on the clamping surface 4, and they face each other.

[0131] On both edges of the heating part in the hair insertion direction (in FIG. 7, the edge from the front direction to the back direction of the paper surface), curling forming surfaces curved in the thickness direction of the heating part (the up and down direction in FIG. 7) are provided. The curling forming surfaces are formed across the entire thickness direction of the heating part and present a 1 / 4 circular arc.

[0132] On both edges of the hair insertion direction of the tip side 29 of the clamping arm, both surfaces (the cross-section of the tip part 29 in the direction perpendicular to the longitudinal direction can be a rounded trapezoid shape, and on the upper and lower bottom parts of the rounded trapezoid shape, and on the heating part side.) are respectively provided as a curved surface or a flat winding surface for winding the hair. That is, the upper bottom part of the rounded trapezoid shape can be used as the winding surface of the curved surface for winding the hair, and the lower bottom part can be used as the winding surface of the flat surface for winding the hair, and the reverse mode is also possible. The curling forming surface can be formed at both ends of the heating part (clamping surface 3), while the winding surface can be formed at both ends of the tip side 29 of the clamping arm. By the relationship between the curling forming surface and the winding surface, the degree of winding of the hair around both curling forming surfaces is changed, so that it is easy to create curls with different variations. That is, it is possible to utilize surfaces with double different curvatures by the curling forming surface at the end of the heating part and the winding surface of the tip side 29 of the arm.

[0133] The winding surface has a curve that curves in the same direction as the curl-forming curved surface. The curved surface of the substantially trapezoidal lower base portion with rounded edges (the length of the lower base portion is longer than that of the upper base portion) is formed by an arc with a larger radius than the curved surface of the upper base portion.

[0134] The winding surface of the substantially trapezoidal lower base portion with rounded edges similarly has a plane that is continuous with the curved surface of the lower base portion at the edge in the hair insertion direction on the tip side 29 of the clamping arm. This plane is formed so as to be perpendicular to the correction plane. The plane of the winding surface of the lower base portion and the curl-forming curved surface of the lower base portion are close to each other in the protruding position in the hair insertion direction. The winding surface of the lower base portion is provided with a winding surface that is continuous with the plane on the opposite side to the correction plane.

[0135] On the other hand, the winding surface of the substantially trapezoidal upper base portion with rounded edges similarly has a winding guide surface as a curved surface with an even larger radius of curvature that is continuous with the curved surface of the upper base portion at the edge in the hair insertion direction on the tip side 29 of the clamping arm (the reason why the cross-section is substantially trapezoidal is that the cross-section is composed of a plane and a curved surface, and the corner portions are curved surfaces).

[0136] Since the clamping surface 3 is supported so as to be able to advance and retreat as described above and is biased by the second spring, when the clamping surface 3 retracts, the hair wound around the curl-forming curved surface of either the upper base portion or the lower base portion extends linearly from both of the curl-forming curved surfaces and contacts the curved surface of the corresponding winding surface. On the winding surface side, it can also be set so that the linearly extending hair contacts the plane as it is.

[0137] Also, with the above configuration, at least one of the edges in the hair insertion direction of the heating portion is provided with a curl-forming curved surface that curves in the thickness direction of the heating portion, and at least one of the edges in the hair insertion direction of the tip side 29 of the clamping arm is provided with a winding surface having a curved surface or a plane for winding the hair, and the hair wound around the curl-forming curved surface extends linearly from the curl-forming curved surface and contacts the curved surface or the plane of the winding surface.

[0138] Furthermore, when the clamping surface 3 retracts, the hair wound around the curl-forming curved surface of the bottom portion extends linearly from the curl-forming curved surface of the bottom portion and contacts the curved surface or flat surface of the winding surface of the bottom portion.

[0139] Next, the case of stretching curly hair or straightening an artificial permanent wave using the hair iron will be described.

[0140] First, when using the hair iron, first apply a liquid agent adjusted to pH 6 - 10 by adding a basic substance such as ammonia, monoethanolamine, or triethanolamine to an aqueous solution mainly containing a mercapto compound (reducing agent) such as thioglycolic acid or cysteine as the first agent to the hair. By this application, the disulfide bond of cystine contained in the keratin protein in the hair is reduced and cleaved as a mercapto group. Then, after washing the hair with water and sequentially drying it with a dryer or the like, the hair is straightened into straight hair using a hair iron heated to 140 - 180°C.

[0141] Specifically, hold the gripping portions 21, 23 of the clamping arms, apply force by placing the thumb and index finger on the force points 25, 27, etc., and sandwich the hair between the heating portions of the clamping surfaces 3, 4. Then, while maintaining that state, slide the clamping arms toward the hair tips. As a result, the hair sandwiched between the heating portions heated by the ceramic heater is stretched while being heated.

[0142] At this time, since the hair moves at a predetermined speed between the magnet plates facing the S poles, reduction energy is generated according to Fleming's right-hand rule. This energy is generated from the S pole of the magnet plate where the electrons of the magnetic pole rotate clockwise, and promotes the reducing action of the first liquid. Moreover, it also functions to close the cuticle that forms the surface layer of the hair. When the cuticle closes, it blocks the entry of ultraviolet rays into the hair, preventing the hair from being damaged by ultraviolet rays.

[0143] Also, due to the energy of this reduction, the water clusters in the first liquid become smaller. As the clusters become smaller, the permeability of the first liquid to the hair increases. Therefore, the reduction effect of the first liquid is further promoted. As a result, the treatment time accompanied by the risk of hair damage can be shortened, and the damage to the hair can also be suppressed.

[0144] Incidentally, a second liquid composed of an aqueous solution of an oxidizing agent such as sodium bromate and hydrogen peroxide is applied to the back hair. As a result, the mercapto group is oxidized to form a new disulfide bond in the hair, and this straight hair state can be fixed.

[0145] Next, the case of applying a permanent wave with a hair iron will be described.

[0146] The hair clamping operation by the clamping surfaces 3 and 4 is the same as described above. When applying a permanent wave, the hair is pressed against the curl-forming curved surface of the upper bottom or lower bottom portion described above. Therefore, while clamping the hair by the clamping surfaces 3 and 4, the iron body is rotated, and the hair is wound around the tip side 29 or 31.

[0147] Thereby, for example, when the hair is wound around one of the curl-correcting curved surfaces of the heating part, the hair starts to be wound from the starting point of the curl-forming curved surface and is wound along the curl-forming curved surface until the end point of the curl-forming curved surface.

[0148] From the end point of the curl-forming curved surface, the hair extends linearly and contacts at a point on the plane side of the curved surface of the winding surface. The hair that contacts the winding surface at the point is sequentially wound around the plane and the winding curved surface. That is, in the bottom surface portion with a rounded trapezoidal shape, it is possible to wind the hair around the curl-forming curved surface → the curved surface of the winding surface → the plane portion → the winding curved surface.

[0149] Therefore, when curling the hair, sufficient curling can be achieved by ensuring that the hair is in sufficient contact with the curling forming surface. Moreover, when tension is applied to the hair by winding it around the clamping arm and attempting to press the hair against the curling forming surface, the hair can be easily slid on the curved and flat surfaces of the winding surface on the clamping arm side. Therefore, the tension applied to the hair by winding can be effectively utilized for pressing against the curling forming surface, enabling sufficient curling.

[0150] The plane of the bottom surface portion is orthogonal to the correction surface, and since the protruding positions of this plane and the curling forming surface are close in the hair insertion direction, the tension applied to the hair by winding can be directly utilized as a pressing force against the curling forming surface by more smoothly sliding on the plane of the winding surface, enabling more reliable and easier curling.

[0151] The pressing force of the hair against the curling forming surface can be generated by winding it around the winding surface. Since the plane is long and increases the distance between the winding surface and the curling forming surface, a relatively large pressing force of the hair against the curling forming surface can be applied by rotating the clamping arm. From this aspect as well, more reliable and easier curling can be achieved.

[0152] Next, when the hair is wound around the other curling correction surface (the curling correction surface of the rounded substantially trapezoidal upper bottom portion) of the heating portion, the hair starts to be wound from the starting point of the other curling forming surface and reaches a state of being wound up to the midpoint of the other curling forming surface.

[0153] From the midpoint of the other curling forming surface, the hair extends linearly and contacts at a point on the curved surface of the winding surface of the upper bottom portion. The hair that contacts the curved surface of the winding surface of the upper bottom portion at this point is sequentially wound around the winding guide surface on the side opposite to the heating portion.

[0154] Therefore, when curling the hair using the curling forming surface of the upper bottom portion, the hair touches up to the midpoint of the curvature of the curling forming surface of the upper bottom portion, enabling a looser curling than that formed by the curling forming surface of the lower bottom portion. That is, since the degree of winding of the hair around the curling forming surfaces of both the upper bottom portion and the lower bottom portion is changed, it is possible to easily perform curling with different variations.

[0155] Moreover, when applying tension to the hair by winding it around the clamping arm and attempting to press the hair against the curling forming surface of the upper bottom portion, the hair can be easily slid on the curved surface and the winding guide surface of the winding surface of the upper bottom portion on the clamping arm side. Therefore, the tension applied to the hair by winding can be effectively utilized for pressing against the curling forming surface of the upper bottom portion, ensuring reliable curling.

[0156] Furthermore, in this embodiment, since the curling forming surfaces of the upper bottom and lower bottom portions of the heating part do not protrude beyond the winding surfaces of the upper bottom and lower bottom portions, which are the hair insertion direction edges of the clamping arm, it is possible to prevent the heating part from touching the person being treated or the like during the treatment.

[0157] However, the heating part can also be configured to protrude beyond the winding surfaces of the upper bottom and lower bottom portions, which are the hair insertion direction edges of the clamping arm. In this case, for example, the heating part is provided with a curling forming surface that curves in the thickness direction of the heating part on one or both (upper bottom or lower bottom portion) of its hair insertion direction edges. This curling forming surface protrudes beyond the hair insertion direction edge of the clamping arm. This curling forming surface is formed across the entire thickness direction of the heating part and can, for example, present a semi-circular arc.

[0158] A winding surface that is a curved surface or a flat surface for winding the hair can be provided at the hair insertion direction edge on the tip side 29 of the clamping arm corresponding to the curling forming surface of the upper bottom or lower bottom portion.

[0159] The winding surface of the upper base or the lower base portion has a curved surface that curves in the same direction as the curl forming curved surface. The winding surface of the upper base or the lower base portion has a flat surface that is continuous with the curved surface of the upper base or the lower base portion. This flat surface is set at an acute angle with respect to the correction surface. The winding surface of the upper base or the lower base portion is provided with a winding surface that is continuous with the flat surface on the opposite side with respect to the correction surface.

[0160] When the hair is wound around the curl forming curved surface of the upper base or the lower base portion of the heating portion, the hair starts to be wound from the starting point of the curl forming curved surface of the upper base or the lower base portion and is in a state of being wound to a point on the other side of the curl forming curved surface.

[0161] The hair extends linearly from the point of the curl forming curved surface of the upper base or the lower base portion and contacts at a point on the flat surface of the winding surface. The hair that contacts the winding surface at a point on the flat surface is sequentially wound around the flat surface that is continuous with the winding surface.

[0162] Therefore, when curling the hair with the curl forming curved surface of the upper base or the lower base portion, the hair can contact the curl forming curved surface of the upper base or the lower base portion for more than a quarter arc, and a more acute curling can be performed than the curl on the curl forming curved surface. In addition, by combining with the two curl forming curved surfaces, different curls can be easily formed.

[0163] Moreover, when tension is applied to the hair by winding it around the clamping arm and the hair is pressed against the curl forming curved surface of the upper base or the lower base portion, the hair can be easily slid on the flat surface of the winding surface on the clamping arm side. Therefore, the tension applied to the hair by winding can be effectively used for pressing against the curl forming curved surface, and curling can be surely performed.

[0164] Note that the present invention is not limited to the above embodiments. For example, it is also possible to make one or both of the clamping surfaces 3 and 4 fixed so that they cannot move relative to the tip sides 29 and 31. The magnet plate, the first spring, etc. can also be omitted.

[0165] Using such a hair iron, an experiment was actually conducted to examine whether hydrogen peroxide can be removed or not.

[0166] <Decomposition temperature of hydrogen peroxide> Approximately 1 g of 100% human white hair bundle (product number: BM-W-A, manufactured by Villerux) was bleached, and the hair bundle with hydrogen peroxide remaining inside the hair was used as the hair bundle for evaluation. The decomposition temperature of hydrogen peroxide inside the hair was determined by the following method, and this temperature was defined as the "hydrogen peroxide removal mode".

[0167] <Measurement of hydrogen peroxide concentration at ironing temperature> The bleach agent 1 of Formulation Example 1 and the bleach agent 2 of Formulation Example 2 were mixed at a ratio of 1:1 until uniform, applied to the hair bundle, and left at room temperature for 30 minutes. Then, it was rinsed with warm water, washed with our company's wool shampoo (product name: Nano Supply Cleansing Shampoo OT), rinsed with warm water, and dried with a dryer. Then, the hair iron of the present invention was set at 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180 °C and the hair bundle was passed through three times. Then, each hair bundle was wetted with water, and a hydrogen peroxide concentration test paper (Mitsubishi Gas Chemical Trading Co., Ltd.: hydrogen peroxide concentration test paper) was pressed against the tip, middle, and root of the hair bundle for 5 seconds, and visual concentration measurement and color measurement with a spectrophotometer were performed. Table 1 shows Formulation Example 1 (bleach agent 1). Also, Table 2 shows Formulation Example 2 (bleach agent 2).

[0168]

Table 1

[0169]

Table 2

[0170] <Judgment of hydrogen peroxide decomposition temperature in hair iron> Next, the hydrogen peroxide concentration test paper was visually confirmed and shown in Table 3.

[0171]

Table 3

[0172] The hydrogen peroxide concentration test paper was measured in the L*a*b* color space using a spectrocolorimeter (model number: CM-36dG, manufactured by Konica Minolta), and is shown in Table 4 and Figure 1. The hydrogen peroxide concentration test paper develops a bluer color when the hydrogen peroxide concentration is high. Therefore, when measured with a spectrocolorimeter, the lower the b* value, the higher the hydrogen peroxide concentration. From Tables 3 and 4, 150 °C or higher at which the hydrogen peroxide concentration significantly decreases is appropriate. Therefore, the "hydrogen peroxide removal" mode can be set to 150 °C.

[0173]

Table 4

[0174] As a result, it was found that while operating the hair iron, it is possible to efficiently reduce hydrogen peroxide and minimize damage to the hair.

[0175] In addition, when viewing the hair iron from above, an asymmetric configuration has been described, but the shape can be changed depending on the application. For example, in the case of a straight iron, it can be made basically symmetric.

Explanation of Signs

[0176] 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 member 8 Connecting member 9 Switch 15, 17 Base end side 19 Rotation axis 21, 23 Gripping part 25, 27 Force point part 29, 31 Tip side One surface of the tip sides 29, 31 One surface of the gripping parts 21, 23 Both surfaces 33, 35 are inclined surfaces The other surface of the tip sides 29, 31 Core material Another plate Plate (heating part) Ceramic heater (heat source) Mica plate Bimetal Bimetal retainer Leaf spring for magnet retainer Leaf spring for plate (biasing part) Magnet

Claims

1. A hair iron having a first arm and a second arm that are connected so as to be openable and closable, a first clamping surface provided inside the first arm, a second clamping surface provided inside the second arm, and a heating unit for heating hair provided on the first and second clamping surfaces, wherein the heating unit has a layer made of at least platinum. The hair iron is characterized by this.

2. The hair iron according to claim 1, wherein the heating unit further has a layer made of at least one of nickel, copper, electroless nickel, or aluminum.

3. The hair iron according to claim 1 or 2, wherein the thickness of the platinum layer is 0.05 to 1.0 μm.

4. The hair iron according to any one of claims 1 to 3, wherein the surface of the heating unit is buffed.

5. The hair iron according to any one of claims 1 to 4, characterized in that the first and / or second arm is provided with a hydrogen peroxide reduction device.

6. Furthermore, the hair iron according to any one of claims 1 to 5, characterized in that the first and / or second arm is provided with a temperature control device.

7. The hair iron according to any one of claims 1 to 6, wherein the hydrogen peroxide reduction device reduces hydrogen peroxide according to a temperature setting.

8. The hair iron according to claim 7, wherein the temperature is 80°C or higher.

9. The hair iron according to claim 7, wherein the temperature is 140°C to 180°C.

10. Furthermore, the hair iron according to any one of claims 1 to 9, characterized in that it has a connecting member that connects the first arm and the second arm.

11. The hair iron according to claim 6, wherein the hydrogen peroxide reduction device and the temperature control device are integrated.

12. The hair iron according to claim 6, characterized in that the first and / or second arm is provided with switches for the hydrogen peroxide reduction device and the temperature control device.

13. The hair iron according to claim 10, wherein the connecting member is one or more.

14. The hair iron according to any one of claims 1 to 13, wherein the first and / or second arm has a biasing portion that biases the clamping surface to elastically adjust the clamping state by the clamping surfaces against each other.

15. The hair iron according to any one of claims 1 to 14, wherein the first and / or second arm has a core material installed therein along the longitudinal direction.

16. The hair iron according to any one of claims 1 to 15, wherein the core material has a stopper portion that engages the clamping surface to restrict movement in the protruding direction with respect to the first and / or second arm.

17. The hair iron according to any one of claims 1 to 16, wherein at least one of the edges of the heating portion in the hair insertion direction has a curl forming curved surface that is curved in the thickness direction of the heating portion.

18. The hair iron according to any one of claims 1 to 17, wherein the edge of the tip side of the first arm and / or the second arm in the hair insertion direction has a curved surface.

19. Furthermore, the hair iron according to claim 17 or 18, characterized by having a plane continuous with the curl forming curved surface and / or the curved surface.

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