EP2378915A1

EP2378915A1 - Hairdressing appliance

Info

Publication number: EP2378915A1
Application number: EP10703315A
Authority: EP
Inventors: Benoît LINGLIN; Monique Paget; Bénédicte SIMOND; Xavier Vacheron; Marc Legrain
Original assignee: SEB SA
Current assignee: SEB SA
Priority date: 2009-01-15
Filing date: 2010-01-15
Publication date: 2011-10-26
Anticipated expiration: 2030-01-15
Also published as: BRPI1007140A2; EP2208433A1; EP2378916B1; CN102271549A; EP2208433B1; BRPI1006793A2; CN102281791A; ES2640039T3; US20120024311A1; CN102271549B; CN102281791B; EP2378916A1; FR2940893B1; KR20110122118A; US8789539B2; BRPI1000086A2; FR2940893A1; ES2686887T3; WO2010081968A1; KR101677776B1

Abstract

The invention relates to a hairdressing appliance (1; 101) comprising two treatment surface assemblies for gripping a lock of hair, the two treatment surface assemblies being respectively carried by jaws (2, 3; 102, 103) arranged facing one another. In accordance with the invention, the treatment surface assemblies have at least a main smoothing region (10, 11; 110, 111) which heats up and is used to grip the lock of hair in a first plane and a complementary smoothing region (20; 120; 220) which heats up and is used to grip the lock of hair in a second plane which is not parallel to the first plane.

Description

HAIRSTYLING APPARATUS

The present invention relates to a hairdressing appliance which is intended for the shaping of the hair, in particular the smoothing of the hair of a person.

Two types of hairdressing apparatus are traditionally known for smoothing. These devices are either straighteners or hair dryers equipped with smoothing accessories mounted at the blower end of the device.

The devices of the straightener type generally comprise two pivoting jaws each comprising an end supporting a treatment surface, at least one of the treatment surfaces being heated, the other being intended to bring the hair into contact with the first, in particular by passing from an opening position of the jaws allowing the insertion of the hair to a closed position for their contact with the heating part. The other end of the jaws form two half-handles acting as a gripping area and to move from the open position to the closing position. The passage is done manually by pressing the two half-handles articulated of the device towards each other to bring the heating part in contact with the hair. Smoothing a lock of hair is done by moving the device along the wick, from the root to the tip.

These smoothing devices make it possible to obtain very "plated" smoothings; the locks of hair, once smoothed, being pressed against the head of the user so that the hairstyle loses a maximum of its volume.

However, the area of contact of the hair with the treatment surfaces is weak. Thus, depending on the type of hair to be treated, it is necessary to make several passes of the device on the same lock of hair. Indeed in cases where the hair is very wavy or very frizzy, it is sometimes necessary to iron up to six times to be able to treat the hair of the wick in totality.

Another solution has been proposed in the document EP 1 124 466 in the name of the applicant where the smoothing device is an accessory to be attached to the end blower of a hair dryer, but where the locks are introduced between the smoothing surfaces of two adjacent blades which are pushed towards one another by elastic means. According to this document, several elastic blades are arranged side by side, their leading ends having chamfers for introducing the hair into the blades. In operation, the front part of the accessory is introduced into the hair, which has the effect of separating the hair into fine locks which are then introduced automatically between the blades adjacent to the accessory.

With this type of device, the lock of hair is divided into several small independent locks, which increases the area of contact of the hair with the treatment surfaces and thus reduce the number of passages relative to a clamp to smooth.

However, the hot breath of the device does not allow smoothing as in a smoothing pliers, the smoothed hairstyle has a greater volume effect.

In addition, this type of device has a bulky structure making its use difficult and impractical.

The object of the present invention is to overcome the aforementioned drawbacks and to provide a hair treatment apparatus that allows a fast and effective treatment of the hair, while being easy and convenient to use.

Another object of the invention is a hair treatment apparatus which is of simplified structure, compact and can be industrialized for a low cost. These objects are achieved with a hairdressing apparatus comprising two sets of treatment surfaces for gripping a lock of hair, the two sets of treatment surfaces being respectively carried by jaws, arranged opposite, characterized in that the sets treatment surfaces comprise at least one heating main smoothing zone for gripping the lock of hair in a first plane and a heating complementary smoothing zone for gripping the lock of hair in a second plane not parallel to the first plane.

According to the invention, the lock of hair is pinched in two non-parallel planes, that is to say, in contact with the treatment surfaces or even pinched mechanically with a higher or lower pressure between the treatment surfaces according to the invention. two non-parallel planes, which increases the surface of the hair in contact with the treatment surfaces and thus increase the efficiency of a passage of the device on a wick at the smoothing result.

In other words, the lock of hair is in contact with the treatment surfaces for a smoothing passage in two different planes, these two planes being for example perpendicular to the direction of movement of the device along the wick of hair. Alternatively the two planes may be inclined non-perpendicularly but sufficient to form two non-parallel planes. The second plane representing the plane of the complementary surfaces can form from the first plane representing the plane of the main surfaces in a transverse axis an angle that can take values between O (not included) and 90 ° (perpendicular included), or even between 55 ° and 85 °, preferably around 60 ° (i.e. having one-third smoothing surfaces inclined relative to the right angle). Thus, the number of passes to smooth a strand of hair effectively is reduced compared to the number of passages required with an existing straightener.

Advantageously, the first plane and the second plane are perpendicular. This arrangement makes it possible to obtain a lock of hair that locally has a substantially rectangular section, because of its position between the treatment surfaces, its contact with the treatment surfaces, or even its mechanical nip between the perpendicular treatment surfaces; the wick is thus treated on four sides.

Thus, when moving the device for smoothing a lock of hair, a rectilinear shaping is obtained from the first pass.

Preferably, the main smoothing zone comprises at least two plates each extending in a plane parallel to the longitudinal axis of each jaw.

Advantageously, the complementary smoothing zone comprises a plurality of parallel surfaces making it possible to split the lock of hair into several fine locks.

Alternatively, the complementary smoothing zone comprises a plurality of non-parallel surfaces for splitting the lock of hair into several fine locks and orienting the entire lock. If the wick passes substantially through the complementary smoothing zone before passing through the main smoothing zone, then the wick, depending on the orientation of the combs relative to each other, can be oriented towards the smoothing plate. main. If the combs are placed substantially convergent towards the smoothing plate, then the wick will be convergent and more concentrated towards a smoothing plate. A technical advantage is that the length of the smoothing plate may be less than that of a smoothing plate associated with a parallel toothed comb. If the combs are placed substantially diverging towards the smoothing plate, then the wick will be distributed more widely to a smoothing plate: a greater distribution of hair is performed and the height of the wick arriving between the main smoothing plates is smaller only with parallel combs between them. An associated advantage is that the temperature of the plates can be less than with parallel combs. For example, the angle of convergence defined by the two teeth of the ends of the comb may be between 2 and 45 °, more precisely between 5 and 30 ° or even equal to 10 °. The angle of divergence defined by the two teeth of the ends of the comb may be between 2 and 45 °, more precisely between 5 and 30 ° or even equal to 10 °. In the case of more than two teeth, the angular distribution of the teeth can be arranged so that all the longitudinal axes of the teeth converge at the same point, or even define the same angle between each axis of neighboring teeth (regular distribution).

The combination of a hair treatment device having a main smoothing zone with a complementary smoothing zone whose surfaces make it possible to orient the wick and / or allow to split the lock of hair into at least one fine wick and of which the teeth are at least partially non-perpendicular to the axis has many advantages.

According to one embodiment of the invention, the main smoothing zone comprises a first smoothing plate having a longitudinal axis L (axis of the handle of the straightener generally) and the complementary smoothing zone has a plurality of parallel surfaces or not at each other. others and which are non-orthogonal to the longitudinal axis L, for example are deviated by an angle between 5 and 20 ° with respect to the orthogonality. The hair is thus separated into several locks and is deflected between 5 ° and 20 ° (10 to 15 ° preferred), which has the advantageous effect of curbing their passage and thus of being able to increase the heat transfer with respect to the same surface of contact. The complementary smoothing surfaces may all be parallel, or chevron, or fan as described above.

This arrangement makes it possible, by multiplying the treatment surfaces, to have a large number of hair in contact with these surfaces and by treating fine locks to have the majority of the hair of the wick in contact with the treatment surfaces. The complementary smoothing zone has a plurality of parallel surfaces represented by at least one row of teeth whose thickness is smaller than the height and the width. This zone may be a toothed device, namely a comb having a row of teeth, aligned or staggered, or at least two substantially parallel combs arranged next to each other, whose respective teeth are located in the same plan or staggered. A combination of at least two adjacent combs makes it possible to produce a complementary smoothing zone which will heat the wick in two successive steps and separated by a non-heating zone of the wick between the two combs, causing less damage to the hair on a passage.

The separation in fine locks also makes it possible to obtain a temperature at the heart of the wick sufficient for a good treatment.

This provides a fast and effective smoothing of each lock of the hair.

Preferably, the main smoothing zone and the complementary smoothing zone are thermally independent.

By thermally independent, it is understood that the heating of the main smoothing zone can be controlled independently of the heating of the complementary smoothing zone.

This arrangement makes it possible to independently adjust the temperature of each smoothing zone according to the type of hair, the state of the hair or the desired result.

In this arrangement, the heating main smoothing zone may be formed of a first plate and a second plate and the complementary smoothing zone may be formed of a toothed device, the first plate and the second plate and the device with smoothing teeth each being in contact with a heating element. Alternatively, it is possible to provide a main smoothing zone and a thermally dependent complementary smoothing zone. By thermally dependent, it is understood that the heating of the main smoothing zone can be controlled depending on the heating of the complementary smoothing zone. It is possible to provide a single heating element in thermal contact and supplying the main smoothing zone and the complementary smoothing zone of one and the same jaw. This reduces the size in the jaw concerned and reduce to a single thermal control that of the jaw concerned. This reduces manufacturing costs.

In this arrangement, the heating main smoothing zone is formed of a first plate and a second plate and the complementary smoothing zone comprises a toothed device, the first plate being in contact with a heating element, the second plate and the smoothing tooth device being in thermal contact with a single heating element.

According to a mode of the invention that will be detailed later, the main smoothing zone and the complementary smoothing zone of the same jaw or both jaws are made in two different parts.

Alternatively to this embodiment, according to a second embodiment of the invention which will be detailed later, the main smoothing zone and the complementary smoothing zone of the same jaw or both jaws are made in a single piece .

Advantageously, the complementary smoothing zone is removable.

In other words, the complementary smoothing zone having a number and shape of given treatment surfaces may be replaced by another complementary smoothing zone having a number and shape of different treatment surfaces.

This arrangement makes it possible to adapt the complementary smoothing zone according to the type of hair and type of desired smoothing result.

Preferably, the complementary smoothing zone is located upstream and / or downstream of the main smoothing zone.

This arrangement makes it possible to propose an alternative embodiment of the invention in a traditional straightener in a very simple and economical manner.

And, substantially, the main smoothing zone is adjacent to the complementary smoothing zone. Thus, for the same wick part, a first smoothing effect in a first plane is obtained by passing the wick treated in contact with the heating main smoothing zone, and before or after a second smoothing effect is obtained according to a second plane not parallel to the first by passing the treated lock in contact with the heating complementary smoothing zone.

The adjacency of the zones can make it possible to come into contact with and treat the hair in a first plane at a first temperature and then in a second plane at a second temperature which may be different from the first temperature.

At the level of the apparatus, this can allow an easier regulation of the temperature. In the hair, this can make it possible to come into contact with and treat the hair with a high temperature while limiting a thermal transfer too fast and / or too high applied to the lock of hair and which could damage it.

In order to further limit the heat transfer to the lock of hair, it is also possible to provide a guard zone arranged between the heating main smoothing zone and the heating complementary smoothing zone. This guard zone may correspond to a heated zone or not but with which the hair is not in contact when it is between the main smoothing zone and the complementary smoothing zone or of which it is sufficiently thermally insulated. The area in the last case corresponds to a zone of thermal insulation. This guard zone has a width of between 0.05 and 2 cm, preferably between 0.5 and 2 mm. It may have a triangular cross section, rectangular, rounded .., It may have the shape of a slot only or may have the shape of a slot filled or partially filled with a material advantageously resistant to temperature and less conductive temperature than the material of the smoothing areas, silicone for example.

Advantageously, the complementary smoothing zone is arranged on the lower jaw and the upper jaw comprises a protective cover arranged opposite the complementary smoothing zone.

This arrangement makes it possible to create a hot chamber in which is enclosed the complementary smoothing zone and the hair in the closed position of the apparatus, which has the advantage of minimizing thermal losses in the air and therefore increasing the performance of the device. The protective cover also makes it possible to drive the fine strands of hair into the treatment surfaces thus favoring heat exchange.

Thus the protective cover can be made of a different part as shown in Figure 2 and / or a different material of the protective plate placed on the same branch of the straightener.

Alternatively no hood can be provided, to limit the heating of the hair. The heating complementary smoothing surface is thus arranged on a jaw without hood facing the other jaw.

Advantageously, the complementary smoothing zone is located inside the main smoothing zone.

This arrangement makes it possible to obtain an apparatus with an axis of symmetry in the longitudinal direction. Thus, the device can be used indifferently by the right hand or the left hand. In an alternative embodiment, one or more heating main smoothing zones may be provided with one or more complementary heating smoothing zones. In this case, it is possible to provide as many planes as there are zones of heating smoothing, all the planes being non-parallel, to improve the smoothing. A heating element may be dedicated to several heating zones or a heating element may be associated with each heating zone.

In an alternative embodiment, the complementary smoothing zone comprises a row of pairs of smoothing blades arranged vis-à-vis, at least one of the blades of each pair being mounted movably relative to an adjacent blade fixed in a manner. to allow the pinch of a lock of hair between two blade treatment surfaces vis-à-vis the same pair.

This arrangement makes it possible to dissociate the clamping force exerted on the wick by the main smoothing zone of the clamping force exerted on the wick by the complementary smoothing zone.

The invention will be better understood with the study of the embodiments taken in no way limiting and illustrated in the accompanying figures in which:

- Figure 1 illustrates a perspective view of the bottom of the apparatus according to a particular embodiment of the invention.

- Figure 2 illustrates a perspective view from above of the apparatus of Figure 1.

- Figure 3 illustrates a perspective view of the underside of the apparatus according to another embodiment of the invention.

FIG. 4 illustrates a perspective view from above of the apparatus of FIG. 3. FIG. 5 illustrates a perspective view of a complementary smoothing zone according to an alternative embodiment of the invention.

Figures 1 and 2 illustrate an apparatus 1 which is a hair straightener in a fashion preferred embodiment of the invention, the apparatus being in the open position. The apparatus 1 comprises an upper jaw 2 and a lower jaw 3 pivotally mounted about a hinge 4. The hinge is provided at the rear with a tip adapted to receive a rotary connector 30 for a power supply cable. main electrical energy.

Each jaw includes a portion adjacent to the hinge 4, forming a gripper type gripping zone constituted by an upper half-handle 5 and a lower half-handle 6.

The upper jaw 2 comprises in the front part a casing 7 adapted to receive a smoothing plate 10. The lower jaw 3 comprises in the front part a casing 8 adapted to receive a plate 11 and a smoothing tooth device 20. There is a guard zone between the plate 11 and the smoothing tooth device. The plate 10 and the plate 11 form a main smoothing zone and the toothed device 20 forms a complementary smoothing zone. The housings 7, 8 are advantageously made of a plastic material by an injection technique.

The plate 10, the plate 11 and the smoothing tooth device 20 are each in thermal contact with a heating element (not shown in the figures) which may be a resistive, PTC, infrared type electrical heating element, etc. powered by a switch 9 receiving power from the main cable of the device. The plates 10, 11 and the smoothing tooth device 20 are made of a metallic material which is a good heat conductor of the aluminum type or its alloys, copper or alloys or steel. The cover receiving the toothed device can be advantageously non-heating because the wick will be heated by the teeth. Alternatively, the hood can be heated and allow the teeth to be less heated or unheated.

According to FIG. 2, the smoothing tooth device 20 comprises a parallelepipedal base 21 placed laterally on the plate 11. The base 21 comprises an upper face 23 disposed in the same plane as the upper face 12 of the plate 11. Alternatively, the height of the upper face 23 (the surface of the teeth) is different, or even lower, at the height of the surface of the the main treatment plate. The base 21 has a series of fifteen teeth 22 arranged in parallel substantially forming a comb with flattened teeth. The teeth 22 are secured by their base to the base 21 and have substantially an ogival shape or arrowhead to split a lock of hair into several fine locks. Each tooth 22 has two parallel surfaces defining two lateral surfaces 24, 25 of treatment. Two side treatment surfaces facing each other belonging to two successive teeth as well as the portion of the upper face 23 between the two teeth 22 define a U-shaped receptacle for a fine wick.

The housing 7 includes a cover 15 arranged laterally to the plate 10, opposite the toothed device 20 smoothing. The protective cover can be made of a different part as shown in Figure 1 and / or a different material from the main straightening plate placed on the same branch of the straightener. The cover 15 has a longitudinal opening 16 receiving the teeth 22 when the device is in the closed position. The hood can prevent contact of the scalp with the teeth 22. The cover 15 also has an outer edge 17.

Alternatively, the pedestal 21 may be removably provided with a dovetail device on a base disposed in the housing 8 (not shown in the figures). Thus, the user can adapt to the device a device with teeth with more or less high teeth, teeth more or less spaced depending on the type of hair and type of desired smoothing.

In operation, after the apparatus 1 is warmed up, the user inserts a lock of hair between the two jaws 2, 3 supporting the plates 10, 11 and the smoothing tooth device 20, preferably by placing the plates 10, 11 closer to the scalp. Then it exerts pressure on the half-handles 5, 6 to close the device. The wick is thus pinch between the two plates 10, 11 and fractionated in fine locks between the teeth 22 by the thrust of the outer edge 17 of the cover 15. The thrust of the outer edge 17 has the effect of bringing the hair of the fine locks into contact with at least the lateral surfaces of the teeth 22, which amounts to exposing the fine locks to one or two hot surfaces located in a plane perpendicular to the plates 10, 11. The user then moves the device 1 along the lock of hair, the root towards the tip of the hair while keeping the appliance closed. The movement of the device increases the pressure of the hair on the lateral surfaces of the teeth 22.

Figures 3 and 4 illustrate an apparatus 101 which is a straightener according to another embodiment of the invention, the apparatus being in the open position. The apparatus 101 comprises an upper jaw 102 and a lower jaw 103 pivotally mounted about a hinge 104. The hinge is provided at the rear with a tip adapted to receive a rotary connector 130 for a power supply cable. main electrical energy.

Each jaw includes a portion adjacent the hinge 104, forming a gripper type gripping area consisting of an upper half-handle 105 and a lower half-handle 106.

The upper jaw 102 comprises in the front part a casing 107 adapted to receive a smoothing plate 110. The lower jaw 103 comprises in the front part a housing 108 adapted to receive a smoothing plate 111. The plate 111 comprises a smoothing tooth device 120 comprising a series of fifteen teeth 122 arranged in parallel substantially forming a comb with flattened teeth. The plate 110 and the plate 111 form a main smoothing zone and the toothed device 120 forms a complementary smoothing zone.

The series of teeth 122 extends along the longitudinal axis of the plate 111, each tooth 122 being substantially centered in the transverse axis of the plate 111. The teeth 122 are secured by their base to the plate 111 and have substantially a ogival shape or arrowhead to split a wick of hair in several fine locks. Each tooth 122 has two parallel surfaces defining two side surfaces 124, 125 of treatment.

Each plate 110, 111 contains a heating element (not shown in the figures) supplied with energy by a switch 109 receiving power from the main cable of the device.

The plate 111 has a longitudinal opening 116 receiving the teeth 122 when the apparatus is in the closed position.

In these modes described, for the same jaw, the complementary heating smoothing zone (220) is entirely fixed relative to the main heating smoothing zone.

In operation, after the apparatus 101 is warmed up, the user inserts a lock of hair between the two jaws 102, 103 supporting the plate 110 and the plate 111 provided with the smoothing tooth device 120, preferably by placing the device closer to the scalp. Thus, this wick is divided into fine locks between the teeth 122. Then it exerts pressure on the half-handles 105, 106 to close the device. The wick is thus pinched between the two plates 110, 111. This nip of the wick has the effect of bringing the hair of the fine locks into contact with the lateral surfaces of the teeth 122, which amounts to putting the fine locks in contact with the hot surfaces in a plane perpendicular to the plates 110, 111. The user then moves the apparatus 101 along the lock of hair, from the root to the tip of the hair while keeping the apparatus closed. The traction exerted on the wick during movement of the device increases the pressure of the hair on the lateral surfaces of the teeth 122.

In another embodiment, the apparatus 1; FIGS. 1 and 3 may comprise a complementary smoothing zone formed by a smoothing tooth device 220 illustrated in FIG. 5 and disposed in place of the toothed devices 20; 120. This device is described in more detail in the application for French Patent No. 0854929 filed by the Applicant and incorporated herein by reference.

The smoothing tooth device 220 mainly comprises a series of fixed blades 232 and a series of movable blades 231 arranged side by side in pairs parallel to each other and means for controlling the translational displacement of the movable blades 231 with respect to the blades. fixed

232. The control means allow a momentary separation of the movable blades 231 relative to the fixed blades 232 at the opening of the jaws of the device so as to pass a lock of hair between the fixed and movable blades of each pair of blades smoothing. The device is illustrated in FIG. 5 in the closed blade position.

A movable blade 231 and a stationary adjacent blade 232 each have a surface facing each other which form two parallel surfaces thus defining two treatment surfaces 224, 225 and in this mode, two gripping surfaces with high pressure.

The fixed blades 232 are secured to the upper surface of a block 240. Between each fixed blade 232 is defined a space for receiving a movable blade 231. Advantageously, the movable blades 231 are independent of each other and are embedded such as riders on a longitudinal median spine 241 of block 240.

In order to provide a homogeneous and uniform heating of the fixed blades 232, a heating element 245 is housed in a central groove 243 of the block 240 formed exactly within the median spine on which the movable blades 231 are embedded.

In order to allow the passage of strands of hair that it is desired to smooth between each pair of blades, the movable blades 231 cooperate with a control device comprising two walkers 250 formed by guide rods on which the blades 231 are slidably mounted. . said 231 blades are each separated by a compression spring 251 and a spacer 253 integral with the player 250 and on which they abut in abutment.

Each of the players 250 cooperates at one end 252 with an actuator (not shown in the figure) movable blades 231 relative to the fixed blades 232.

The actuating device makes it possible, during the opening of the jaws of the apparatus, to cause the walkers 250 and thus the movable blades 231 to move backwards, causing said blades 231 to move away from the fixed blades 232.

When closing the jaws, the actuating device pushes the walkers 250 and therefore the movable blades 231 against the fixed blades 232, thereby pinching the locks of hair between said blades 231, 232.

Of course, the invention is not limited to the embodiment described and illustrated which has been given by way of example. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Thus, the teeth may have at their end a protrusion forming a comb to facilitate the insertion of the hair.

Claims

Hairdressing appliance (1; 101) having two sets of treatment surfaces for gripping a lock of hair, the two sets of treatment surfaces being respectively carried by jaws

(2, 3; 102, 103) arranged opposite, characterized in that said sets of treatment surfaces comprise at least one heating main zone (10, 11; 110, 111) for heating the lock of hair according to a foreground and a complementary smoothing area (20; 120; 220) heating to pinch the lock of hair in a second plane not parallel to the foreground.

2. Hairdressing appliance (1; 101) according to claim 1, characterized in that the first plane and the second plane are perpendicular.

3. Hairdressing appliance (1; 101) according to any one of claims 1 to 2, characterized in that the main smoothing zone comprises at least two plates (10, 11; 110, 111) each extending in a parallel plane. to the longitudinal axis of each jaw (2,3,102,103).

4. Hairdressing appliance (1; 101) according to any one of claims 1 to 3, characterized in that the complementary smoothing zone (20; 120; 220) comprises a plurality of parallel surfaces (24, 25; 125; 224, 225) for splitting the lock of hair into several fine locks.

5. Hairdressing appliance (1; 101) according to any one of claims 1 to 4, characterized in that the main smoothing zone and the complementary smoothing zone are thermally independent.

6. Hairdressing appliance (1; 101) according to the preceding claim, characterized in that the heating main smoothing zone is formed of a first plate (10) and a second plate (11) and the complementary smoothing zone is formed of a toothed device (20), the first plate (10), the second plate (11) and the smoothing tooth device (20) each being in thermal contact with a heating element.

Hairdressing appliance (1; 101) according to any one of claims 1 to 4, characterized in that the heating main smoothing zone and the complementary smoothing zone are thermally dependent.

8. Hairdressing apparatus (1; 101) according to the preceding claim, characterized in that the main smoothing zone (10, 11; 110, 111) heating and the complementary smoothing zone (20; 120; 220) heating of the same The jaws of the apparatus (2, 3; 102, 103) are in thermal contact with a single heating element.

Hairdressing appliance according to the preceding claim, characterized in that the heating main smoothing zone is formed of a first plate (10) and a second plate (11) and the complementary smoothing zone comprises a toothed device ( 20), the first plate (10) being in contact with a heating element, the second plate (11) and the smoothing tooth device (20) being in thermal contact with a single heating element.

10. Hairdressing appliance (1; 101) according to any one of claims 1 to 9, characterized in that the complementary smoothing zone (20, 120, 220) is removable.

Hairdressing appliance (1) according to one of claims 1 to 10, characterized in that the complementary smoothing zone (20) is situated upstream and / or downstream of the main smoothing zone (10, 11). .

Hairdressing apparatus (101) according to one of claims 1 to 11, characterized in that the complementary smoothing zone is located inside the main smoothing zone.

Hairdressing appliance (1) according to claim 10 or 11, characterized in that the complementary smoothing zone (20) is arranged on the lower jaw (3) and in that the upper jaw (2) comprises a hood ( 15) arranged next to the complementary smoothing zone (20).

14. Hairdressing appliance (1; 101) according to the preceding claim wherein the cover (15) protection is made of a different part and / or a different material from the main smoothing plate placed on the same branch of the straightener .

15. Hairdressing appliance (1; 101) according to one of claims 1 to 14 wherein the complementary heating smoothing zone (220) is entirely fixed relative to the main heating smoothing zone.

Hairdressing appliance (1; 101) according to one of claims 1 to 13 characterized in that the complementary smoothing zone (220) comprises a row of pairs of smoothing blades arranged in facing relation, at least one of the blades (231) of each pair being movably mounted relative to a fixed adjacent blade (232) so as to allow a lock of hair to be clamped between two treatment surfaces (224, 225) of the screw blades to the same pair.

Hairdressing appliance (1; 101) according to one of the preceding claims, comprising a guard zone arranged between the main heating smoothing zone (10, 11; 110, 111) and the complementary heating smoothing zone (20, 120, 220). ).

18. Hairdressing appliance (1; 101) according to the preceding claim wherein the guard zone corresponds to a thermal insulation zone.

19. Hairdressing appliance (1; 101) according to one of the two preceding claims wherein the guard zone has the shape of a slot, possibly filled with a non-conductive material of temperature.