FR3015876A1 - DEVICE FOR TREATING THE HAIR AND RELATED RECHARGE - Google Patents

Abstract

The present invention relates to a refill (20) for a hair treatment apparatus, extending along a longitudinal axis (Xrech) and comprising: a reservoir containing a capillary product, and a dispensing tip for the product contained in the reservoir, the dispensing nozzle having at least one portion extending axially between the abscissae (x1, x2), on the longitudinal axis (Xrech), of the internal longitudinal ends of the reservoir, this portion being fed through a feed passage extending between said abscissae (x1, x2) and between the reservoir and the dispensing nozzle, said feed passage being oriented at least partially transversely to the longitudinal axis (Xrech).

Description

The present invention relates to devices for treating the hair, and more particularly, but not exclusively, those intended for shaping the hair, in particular those intended for smoothing, wrapping or embossing the hair, comprising a refill in a cosmetic product.

BACKGROUND The hair straighteners usually consist of two arms connected to each other by means of a hinge which allows the opening and closing of the latter and at least one heating element arranged on them. arms. During styling operations of a lock of hair, the latter is introduced between the two arms in the open position, then the two arms are closed manually on the lock of hair. The lock of hair is then subjected, until the opening of the two arms and the extraction of the lock of hair, to the heat emitted by the heating element. WO 2009/078046 discloses a styling apparatus having two arms interconnected to allow the opening and closing of the apparatus, at least one heating member and at least one seat of a capillary treatment device , the capillary treatment device for dispensing, in operation, a hair product. The hair treatment device is composed of a support material impregnated with a hair product and adapted for a single use. WO 2009/015027 and US 2009/0025247 disclose a device for smoothing the hair, allowing the application of a hair product by contact with the hair. The hair product to be applied is contained in a removable refill for its application. The removable refill comprises a reservoir containing the capillary product in gelled form and dispensing and application openings of the product, made directly through a wall of the reservoir. The refill is introduced into a housing disposed on one of the two arms of the hair straightener, by sliding. There is a need to further improve the devices for applying a hair product to allow the user to easily reload the device into a hair product and / or change the hair product to be applied. There is also an interest in having a sufficient quantity of hair product to be applied without changing the refill, to allow, on the one hand, to comb the hair more abundant and, on the other hand, to repeatedly reuse the same refill .

SUMMARY The subject of the invention is, according to a first of its aspects, a refill for a hair treatment apparatus, extending along a longitudinal axis and comprising: a reservoir containing a hair product, and a dispensing tip of the product contained in the reservoir, the dispensing nozzle having at least one portion extending axially between the abscissae, on the longitudinal axis, of the inner longitudinal ends of the reservoir, this portion being fed through a feed passage extending between said abscissa and between the reservoir and the dispensing nozzle, said feed passage being oriented at least partially transversely to the longitudinal axis. The reservoir present in the refill makes it possible to have a quantity of capillary product sufficient for dispensing a plurality of doses of product. The overlap of the reservoir and the dispenser tip provides a compact and easy to handle refill.

By "longitudinal end of the reservoir" is understood the longitudinal ends between which the reservoir extends when it is full. The feed passage may extend along an axis perpendicular to the longitudinal axis of the refill and is preferably located in the first or last quarter of the length of the reservoir.

Charging may be longer than thick. The refill may be devoid of pivoting flap for access to the reservoir, the reservoir being irremovable. The refill comprises, preferably, a rigid or semi-rigid body having a first and a second housing separated by a partition wall, preferably rigid or semi-rigid, in particular in the same material as the rigid or semi-rigid body. Preferably, the first housing contains the dispensing nozzle and the second housing contains the reservoir or at least partially defines it, the feed passage being made through the separating wall, preferably near one of the longitudinal ends of the housing. recharge.

Preferably, the interior volume of the tank varies when the refill is in use.

The maximum capacity of the reservoir is preferably between 2 ml and 20 ml. The reservoir may be in the form of a flexible bag received in the second housing. The flexible bag is preferably attached to at least two distinct locations on a wall defining at least partially the second housing, in particular on the separating wall. The reservoir may be delimited at least partially by a flexible wall, and at least partially by a rigid or semi-rigid wall, including in particular the aforementioned separating wall and / or the rigid or semi-rigid body.

The second housing may comprise a wall having at least one groove, preferably longitudinal, opening on the feed passage, to facilitate the circulation of the capillary product within the reservoir to the feed passage, particularly when the flexible membrane tends to press against the separating wall. The supply passage may be at least partially defined by at least one duct opening into the reservoir, in particular near one of the longitudinal ends of the reservoir. The conduit may be provided laterally with at least one slot or notch facilitating the passage of the capillary product in the feed passage. The conduit may extend to the dispensing nozzle, the latter being preferably made from an extension of the conduit. The capillary product is preferably in the fluid state, that is to say liquid, at room temperature or at a higher temperature, for example between 25 and 95 ° C. In this case, the product may initially be in a solid or pasty state at room temperature in the tank and be reheated within the tank to make it sufficiently fluid to be dispensed by a dispensing mechanism intended to feed the mouthpiece. distributor. The product is thus fluid in the tank at the time of application. Preferably, the product is liquid at room temperature. When the product is initially solid in the refill and heated to be fluidized, the area around the applicator member is preferably non-heating so as to more easily control the temperature of the product.

The dispensing tip is preferably pre-filled with the hair product. This can avoid having to repeatedly operate a dispensing mechanism before the first use of the refill. As a variant, the dispenser tip may be filled at least partially, and more completely, with product when the refill is introduced into the apparatus, in particular when the reservoir sees its interior volume decrease when the refill is placed in it. the device. The dispenser tip preferably has at least one dispensing orifice, more preferably a plurality of dispensing orifices, preferably constituted by at least one slot, more preferably a plurality of contiguous-edge slots, particularly orifices made through a deformable wall, preferably a wall defined by a portion of a flexible conduit. Preferably, said at least one dispensing orifice of the capillary product does not open into the reservoir.

Preferably, the rigid or semi-rigid body has a longitudinal opening on the side of the first housing opposite to that of the separating wall and the dispensing orifices open on said longitudinal opening, allowing the product to be dispensed. The refill preferably comprises an applicator member supplied with product from the dispensing nozzle, the applicator member preferably covering, at least partially, the dispensing tip. The applicator member may comprise a porous material and / or capable of releasing or diffusing the cosmetic product, in particular an open cell foam. The applicator member may be mounted in a fixed or removable manner on the rigid or semi-rigid body, in particular on the opening of the latter, at least partially covering the dispensing nozzle to allow the product contained in the dispensing nozzle to impregnate the applicator member through the longitudinal opening. Preferably, the applicator member comes into contact with the dispenser tip. Preferably, the applicator member has a length less than that of the refill. The dispenser tip is preferably made to fill with product upon actuation of the dispensing mechanism, increasing volume by elastic deformation under the pressure of the product. Thus, product may be accumulated in the dispensing tip for distribution after the filling action ceases. This allows a delayed supply of the application member, to avoid having to accumulate a lot of product within the application member, and thus reduce product losses during the change thereof . The applicator member may be, if desired, made with a relatively small thickness, for example less than or equal to 10 mm. The refill preferably comprises one or more components of a pump supplying the dispenser nozzle with product from the reservoir, in particular at least one peristaltic pump pipe or a valve pump constituting part of the dispensing mechanism allowing supplying the application member with product. The peristaltic pump pipe may be constituted by a portion of a flexible conduit connecting the dispensing nozzle to the reservoir. Preferably, the reservoir comprises a pressing element, in particular guided in displacement by notches of the rigid or semi-rigid body, intended to come to press the peristaltic pump pipe to deliver a dose of product. The volume of capillary product delivered to the dispenser tip each time the pump is actuated may be between 0.01 ml and 0.5 ml. The refill may comprise a vent made through the rigid or semi-rigid body, for putting the reservoir containing the capillary product at atmospheric pressure and opening in particular in the second housing. The refill may comprise a closure member of the refill in the absence of use, in particular a lid or cover intended to cover the applicator member at least partially.

The invention further relates to a device for treating the hair, comprising: at least two movable arms relative to one another between a close configuration of treatment of the hair and a configuration apart from engagement between them and to the front of the device of a lock of hair to be treated, - a refill according to the invention, the refill being removably disposed on one of the two arms.

The use of a refill allows the user to easily apply different hair products by simply changing the refill. The two arms extend along respective longitudinal axes and are preferably connected by a hinge present at their proximal end, this hinge defining an axis of rotation oriented preferably perpendicularly to a plane defined by the longitudinal axes of the arms. . Both arms can define extended half-handles towards their distal end by jaws. The maximum thickness of the arms, measured at the level of the jaws, is preferably greater than that measured at the level of the half-handles; the maximum thickness of each arm is preferably between 10 and 40 mm, better between 17 mm and 32 mm. The refill preferably has a length less than or equal to two-thirds of the length of the corresponding arm, better than or equal to half the length of the arm, the refill being located at the front of the device. The arm carrying the refill and the refill preferably extend along respective longitudinal axes parallel to each other. The recharge can be received in a housing to integrate the refill arm. Preferably, the housing is a slide and the refill is integrated on the arm by longitudinal sliding in the latter. Preferably, the refill comprises a lateral extension intended to slide in the slide and to maintain the refill on the arm. The housing may have an opening, extending preferably along the longitudinal axis of the arm, giving onto the other arm, this opening allowing the application of the hair product, in particular by the applicator member carried by the refill. The device may include an electrical switch disposed on the same arm as the refill and actuated by the refill, in particular for detecting the presence of the latter on the arm. The refill may include an extension visible from the outside of the device when it is in place on said arm, visually allowing to check the presence of the refill.

The refill is arranged in such a way that the applicator member comes into contact with the hair when the arms are closed. The arm opposite the one carrying the refill can define a counter-support surface, so that the hair is applied with a certain pressure by the counter-bearing surface against the applicator member. Preferably, the device is made in such a way that the application member is automatically supplied with product when the device is used. Thus, the user does not have to worry about exerting a particular action on the device. to apply the product. The closing of the arms can actuate the pump which makes it possible to supply the application member with product, in particular with a dose of product. A dose of product is preferably between 0.01 ml and 0.5 ml. The applicator member is preferably supplied with product with a temporary accumulation by the dispenser nozzle of pressurized product. The presence within the dispensing nozzle of pressurized product, after the jaws have been brought together, makes it possible to continue feeding the applicator member with product while the device is moved along a lock of hair with jaws close together. The arm opposite the one carrying the refill may have a steam outlet, and preferably also a comb. It may be advantageous to use two combs, located respectively downstream and upstream of the application zone of the cosmetic product, to promote the homogeneous distribution of the product on the hair. These combs are advantageously parallel to one another, and may have the same number of teeth. Where appropriate, the device is made to allow a removable attachment of at least one of the combs, preferably each comb.

Preferably, especially when one seeks to smooth the hair, the device comprises a heating element intended to come into contact with the hair, and better two heating elements each arranged on an arm. This or these heating elements may each comprise a plate of a good heat-conducting material, defining a hot surface of contact with the hair, whose temperature is for example greater than or equal to 95 ° C, better between 90 and 230 ° vs. Preferably, the application of product on the lock of hair introduced into the device is done before the application of steam and / or combing and / or smoothing by the heating element or elements. Thus, the hair introduced between the arms can come into contact with the applicator member before being exposed to steam and the heating elements during the movement of the wick between the arms of the device. hair treatment device, comprising: - at least two movable arms relative to one another between a close configuration of treatment of the hair and a spaced configuration of engagement between them and in front of the device of a strand of hair to be treated, one of the arms having a base having a housing opening at the distal end of the arm and opening at least a part of its length facing the other arm when the two arms are in configuration close, a refill according to the invention, the refill being disposed removably in the housing, the refill extending along a longitudinal axis and being introduced into the housing by an end sliding movement along its longitudinal axis. The device may be a straightener with flat heating elements, in particular coming into contact in the closed position. The invention will be better understood on reading the following detailed description, nonlimiting exemplary embodiments thereof, and on examining the appended drawing, in which: FIG. perspective an example of a device for treating the hair and associated recharge before introduction of the refill in the device, - Figure 2 is a schematic side view of the device of Figure 1 when the refill is in the device, - FIG. 3 is a diagrammatic front view of the device of FIG. 2; FIGS. 4 and 5 are diagrammatic perspective views in two different observation positions of an example of a refill that can be used within 6 is a side view of the refill of FIGS. 5 and 6; FIG. 7 is a longitudinal section of the refill of FIGS. 5 and 6; FIG. 8 is a view of FIG. side of the enforcement body of the Referring to FIGS. 4 and 5, FIG. 9A represents in isolation the dispensing nozzle in plan view, FIG. 9B is a view similar to FIG. 8A of a tip variant, FIGS. schematic views in longitudinal section of examples of refills according to the invention, - Figure 12 is a cross-sectional view of an example of refill according to the invention, - Figure 13 shows in longitudinal section a variant of the device according to the invention. FIG. 14 is a diagrammatic cross-section of a device according to the invention, illustrating the arrangement of different components thereof, and FIGS. 15 and 16 represent, separately, dispenser tip variants. . FIG. 1 shows the handpiece 2 of an example of a device for treating the hair of the invention.

This handpiece 2 has two jaws 3 and 4 movable relative to each other between a spaced configuration (not shown) of introduction between them of a lock of hair and a close configuration of treatment, illustrated in FIG. FIG. 1. The jaws 3 and 4 are carried by respective upper and lower arms 6, which are in this example interconnected at one end by a hinge 8, the handpiece 2 thus forming a clamp. The upper and lower arms 6 each preferably have a total length of between 22 cm and 31 cm and define, between the hinge 8 and the jaws 3 and 4, respective half-handles 10 and 11 on which the user can press to bring jaws 3 and 4 closer together.

The upper and lower arms 5 extend along respective longitudinal axes X 1 and X 2, illustrated in FIG. 2, which are preferably parallel to one another when the jaws 3 and 4 are closed again. An elastic return member (not shown) is preferably provided to return the jaws 3 and 4 in a spaced apart configuration, this resilient return member being for example a spring disposed about an axis of the hinge 8. The invention It is not limited to a particular way of connecting the upper and lower arms 6 to each other and the jaws 3 and 4 can be made mobile otherwise without departing from the scope of the present invention. However, the presence of a joint is widely preferred for the ergonomics it brings. The jaws 3 and 4 define between them a hair treatment zone intended to receive a strand of hair to be treated, along which the handpiece 2 is moved during the treatment, for example in the direction from the root towards the tip of the hair. In the example considered, the handpiece 2 is configured to apply a cosmetic product, provide treatment of the hair with steam and to effect heat treatment of the hair by contact with one or more hot surfaces.

The direction D of displacement of the handpiece 2 on the hair, illustrated in FIG. 3, is preferably substantially perpendicular to the longitudinal axes Xi and X2 of the upper arm 5 and lower arm 6. The handpiece 2 is connected by a cord 13, in the example, to a base station not shown, fixed during the treatment, connected to the sector.

This base station provides power to the handpiece 2 and its water supply for steam generation and can also perform ancillary functions for processing electrical signals received from the handpiece 2. The cord 13 which connects the handpiece 2 to the base station can thus include various electrical conductors and a water supply pipe.

A user interface, not shown in the figures, may be present on the handpiece 2 to allow the user for example to start or not certain components thereof. The cosmetic product is applied by an applicator member arranged to come into contact with the hair extending through the treatment zone.

The applicator member 15 is supplied with product by means of a dispensing mechanism which is actuated automatically when the handpiece 2 is used, for example to apply to the hair a quantity of product such that a mass of one gram of hair consisting of 20 cm long hair receives between 0.015 and 0.4 g, better still between 0.01 and 0.2 g of product in the case of a care product, or even more in the case of thermal smoothing products, coloring or chemical smoothing, the received amount then being for example between 0.5 and 10 g.

The upper arm 5 may comprise, as illustrated in Figure 1, a slide 33 disposed on the jaw 3, allowing the introduction of a refill 20 according to the invention and the removal thereof once the product is exhausted . The handpiece 2 can be arranged to automatically detect the presence of the refill 20 in the slideway 33. This detection can be performed for example electronically, thanks to a contactor actuated by the refill 20 when it is in place on the handpiece 2. The refill 20 may optionally be made to have an extension 45 which is easily accessible from outside the device, the user can by viewing this extension have knowledge of the presence of the refill in the device, especially when the slide 33 covers the refill 20. This extension can also allow the grip of the refill to facilitate its removal from the slide 33. will now be described with particular reference to Figures 5 to 7, an example of recharge 20 can be used especially with a handpiece 2 as illustrated in Figures 1 to 4. The recharge 20 5 to 7 comprises a reservoir 23 and a dispenser nozzle 53. The refill 20 extends along a longitudinal axis Xrech.

Preferably, the refill 20 comprises a rigid or semi-rigid body 25 comprising a first housing 27 and a second housing 29 separated by a wall 31. The first housing 27 may comprise the dispensing nozzle 53 and the second housing 29 may comprise the 23. The separating wall 31 is preferably made of a rigid or semi-rigid material. It can be integral with the rigid or semi-rigid body 25.

The rigid or semi-rigid body 25 has two longitudinal ends. The first end 26a is located on the introduction side of the refill in the slideway 33, and the second end 26b is located on the opposite side. Preferably, the first housing 27 and the second housing 29 overlap at least partially.

The reservoir 23 extends at least partially between the abscissa x1 and x2, as shown in Figure 7, on the longitudinal axis Xr'h of its inner longitudinal ends. By "internal longitudinal ends" is meant the furthest points, along the Xrech axis, of the inner surface of the tank 23 when the latter is full. The distributor nozzle 53 extends, at least partially, preferably completely, between the abscissae x1 and x2 of the longitudinal ends of the reservoir 23.

The Xrech axis is preferably rectilinear, as illustrated. As illustrated in Figure 14, the slideway 33 may comprise at least one rim 35 extending in a space 38, illustrated in Figure 1, for receiving the refill 20. The rigid or semi-rigid body 25 may comprise an extension lateral arrangement allowing the sliding and fixing of the refill in the slideway 33. Preferably, the lateral extension comprises at least one upright 36 shaped to engage behind the rim 35 and an extension 42 disposed, when the refill 20 is introduced into the slide 33 on the jaw 3. The lateral extension 42 makes it possible to hold the refill 20 in position so that it can not disengage from the jaw 3 other than by sliding along the axis Xi of the arm 5 preferably to the distal portion of the jaw 3. Preferably, the lateral extension is formed so that the refill 20 can not slide off the slide 33 under the effect of its own weight. The contacting surfaces may be rough and / or the lateral extension may tighten the rim 35 between the upright 36 and the extension 42 to increase the frictional forces between the slideway 33 and the lateral extension and prevent sliding of the refill 20 without the application of a force greater than a given force, directed along the longitudinal axis Xrech of the refill 20. As illustrated in the figures, the rigid or semi-rigid body 25 is preferably composed of minus two pieces assembled rigidly. The first part 25a forms the second housing 29 and is closed by the second part 25b comprising the separating wall 31. The first part 25a may have on its covered contour a recess 28 for receiving the second part 25b. The rigid or semi-rigid shell 25 may be thermoformed.

The separating wall 31 is traversed by a passage 41 allowing the fluidic communication between the reservoir 23 and the dispensing nozzle 53. As illustrated in FIG. 7, the passage 41 is oriented along a Y axis orthogonal to the longitudinal axis Xrech of the refill. The passage 41 may comprise, as illustrated in FIGS. 10 and 11, an opening made in the separating wall 31 or, as illustrated in FIG. 7, a channel having at least one projecting end in the reservoir 23. Preferably, the passage 41 is disposed near the end 26a, internal to the device when the refill 20 is mounted on the slideway 33. The rigid or semi-rigid body 25, in particular the second part 25b, preferably has a longitudinal opening 60 on substantially all its length.

The first part 25a may have a vent 95 opening on the second housing 29 receiving the reservoir 23. In the example and seen particularly in Figures 4 to 7, the reservoir 23 and the distributor nozzle 53 extend according to respective longitudinal axes Xres and Xem which are parallel and offset vertically relative to each other by a distance c. Preferably, the longitudinal axes X 'and Xem are parallel to the axis Xrech of the refill 20. A duct 65 connects the reservoir 23 to the dispenser nozzle 53. As shown in FIGS. 10 and 11, the duct 65 can be introduced into the feed passage and overtake or not on the side of the tank 23.

When the duct 65 protrudes from the reservoir side, it preferably comprises a slot or a notch 70 facilitating the circulation of the product of the reservoir 23 to the dispensing nozzle 53. In a variant, as illustrated in FIG. can be fixed to a relief located on the side of the first housing 27 of the passage 41.

The distributor nozzle 53 is preferably arranged to deliver the product in a unidirectional manner, by at least one dispensing orifice 68, visible in FIGS. 9A and 9B, closed at rest and being able to open under the pressure of the product. upstream. As illustrated in FIGS. 9A and 9B, the dispensing nozzle 53 can comprise several dispensing orifices 68 arranged in the extension of each other, so as to deliver the product along the applicator member 15. This or these distribution orifices 68 may be, as illustrated in FIG. 9A, elongate slots along an axis perpendicular to the longitudinal axis Xem of the distributor nozzle 53. As a variant, the orifices 68 are oriented along an axis parallel to the axis The distribution orifice (s) 68 are preferably aligned along a diametrical median plane of the dispenser nozzle 53. The length p of each dispensing orifice 68 may range from 1 to 5 mm. The dispensing orifices 68 may be of identical length p and be evenly distributed along the dispensing nozzle 53. The gap 142 between two consecutive dispensing orifices 68 is, for example, from 1 to 5 mm. Preferably, the dispenser tip 53 is elastically deformable, so as to be able to increase the internal volume to accumulate product from the reservoir 23 before dispensing it, and the dispensing orifices 68 are arranged to open only after such an increase in volume. Thus, it is possible to spread the product distribution over a period of time greater than the duration of the filling action of the dispenser nozzle 53. A prolonged distribution of the product is useful to ensure the most homogeneous application possible all along the treated wick and reduce the risk of product presence in unsuitable quantities. Preferably, the feeding system of the applicator member 15 is arranged so that the distribution of the product following the approach of the jaws 3 and 4 lasts more than 10 s, in particular between 10 and 30 s, for example about 20 s. , or significantly the average duration of treatment of a lock for most users. A particularly simple and effective way to obtain a prolonged distribution of the product is to use an elastomeric material to make the dispensing nozzle 53, of tubular shape closed at one end, for example of Shore hardness 55 and to provide it, as illustrated on FIGS. 10A and 10B, of several dispensing orifices 68 in the form of slits closed at rest and capable of opening by deformation under the pressure of the product upstream. The slots are preferably made by cutting, so as to close with a good seal at rest. The dispensing nozzle 53 comprises, for example, a tubular body with a wall thickness of between 0.3 and 2 mm, for example with an internal diameter of 3.2 mm and an outside diameter of 5 mm, made of silicone or another material such as EPDM (rubber).

The dispensing nozzle is preferably, as illustrated, constituted at least in part by an extension of the duct 65. The attachment of the applicator member 15 to the rigid or semi-rigid body 25 can be effected in various ways. . The application member 15 may for example be retained by friction on the rigid or semi-rigid body 25 or alternatively be retained by gluing or welding or with the aid of an additional holding member, not shown. In particular, the applicator member 15 can become wedged in the longitudinal opening 60 made on the rigid or semi-rigid body 25 and partially receive the dispensing nozzle 53. The applicator member 15 can be removably retained. or not. Attachment of the applicator member 15 to the rigid or semi-rigid body 25 may be effected in a variety of ways. The application member 15 may for example be retained by friction on the rigid or semi-rigid body 25 or alternatively be retained by gluing or welding or with the aid of an additional holding member, not shown. In particular, the applicator member 15 can jam in the elongate opening 60 made on the rigid or semi-rigid body 25. The applicator member 15 can be held removably or not on the second 25b of the rigid or semi-rigid body 25. It is interesting to be able to change the application member 15 from one use to another without having to replace the refill 20 entirely, especially for reasons of hygiene or to be able to place the application member 15 between two uses in a closed container to prevent drying out. Refill 20 preferably carries the applicator member 15. Preferably, the length of the applicator member 15 is less than the length of the refill 20.

The applicator member 15 is preferably wedged against the longitudinal end 26b of the rigid or semi-rigid body 25. The portion 60a of the longitudinal opening 60 may comprise at least one pump component, in particular peristaltic or valves, including a peristaltic pump hose. The pump component may be a peristaltic pump pipe, in particular formed by a portion of the duct 65 connecting the reservoir 23 to the distributor nozzle 53.

As illustrated in Figures 6 to 9, the rigid or semi-rigid body 25 may also have in the portion 60a of the opening a pressing member 95 as described below. Preferably, the applicator member 15 comes into contact with the dispensing nozzle 53 facing the openings 68, so as to absorb the product delivered by it as soon as it leaves. The reservoir 23 disposed in the second housing 29 of the rigid or semi-rigid body 25 may be at least partially rigid or flexible. In the case where the reservoir 23 comprises a flexible wall 73 as illustrated in Figure 10, it is for example formed by the assembly of two sheets of polypropylene or a complex forming a flexible bag. Preferably, the flexible bag is attached to the partition wall 31, in particular by welding, in at least two points thereof and has an opening facing the separating wall 31 of the side disposed near the end 26a of the refill . The fixing points 75 are preferably at the two longitudinal ends of the flexible bag 73. The attachment points 75 make it possible to hold the flexible bag 73 against the separating wall 31, in particular during the volume reduction of the flexible bag 73 to improve In a variant, the reservoir 23 is at least partially defined by the separating wall 31. For example, as illustrated in FIGS. 11 and 12, the reservoir 23 is defined by the dividing wall 31. and by a flexible wall 73 which is fixed on the separating wall 31 and which, during the emptying of the reservoir 23, gradually comes to press against the partition wall 31. The separating wall 31 preferably comprises at least one rib 54 terminating especially on the feed passage 41 and allowing the flow of the product to said passage, even when the flexible wall 73 is pressed against the dividing wall 41 Preferably, the rib or ribs 54 extend over substantially the entire length of the tank 23. The latter allow better emptying the tank 23 before changing the refill 20. The flexible wall 73 may be an elastically deformable membrane. The vent 95 makes it possible to have a return of air into the tank 23 in order to allow the tank 23 to empty by changing its volume.

The reservoir 23 may be for single use. Alternatively, the refill 20 may comprise a reservoir filling valve 23, not shown, to fill the reservoir 23 when the latter is empty or partially empty. The pressure filling of the dispensing nozzle 53 can be realized in various ways. As illustrated in FIG. 14, the product can be brought from the reservoir 23 to the dispensing nozzle 53 by the actuation of a peristaltic pump. A particularly simple and effective way to make this pump is to use a system as shown in Figure 14, comprising a pressing element 95 such as a roller or a cam, movable on the refill 20, so as to come in support during its movement against the flexible conduit 65 connecting the reservoir 23 to the dispenser tip 53 and pinch it, then gradually crush it towards the dispenser tip 53 to drive the product contained therein to the dispenser nozzle 53. The duct 65 remains pinched as long as the jaws 3 and 4 are closed on the hair, which makes it possible to hold the dispensing nozzle 53 under pressure and to force the product to leave it through the orifices 68. in Figure 13, the pressing member 95 can be actuated by a relief 96 carried by the lower arm 6, the relief 96 coming into contact with the pressing member 95 when the jaws 3 and 4 are brought together.

As illustrated in FIG. 4, the pressing element 95 may comprise on its opposite faces two pairs of lugs 97 engaged in guide slots 99, made on uprights 98 of the rigid or semi-rigid body 25. These slots 99 are oriented substantially perpendicularly to the axis of the flexible duct 65 extending between the uprights 98. The pressing element 95 can initially move substantially in translation, in the slots, to clamp the flexible duct 65 under the thrust of said relief 96 The slots 99 each have a notch which allows the pressing member 95 to then tilt by progressively crushing the flexible conduit 65, the lugs 97 engaging in the notches, during the continuation of the support of the relief 96 on the pressing element 95. The relief 96 may be carried by a non-illustrated adjustment member, such as a slider or a wheel, the rotation or displacement of which acts on the degree of prominence and / or the positioning of the reel. lief 96 which acts on the pressure element 95. In a variant, the flow rate adjustment is effected at the level of the arm which carries the reservoir, for example thanks to a regulating member which more or less restricts the flow of the product or which more or less backs a counter-bearing surface against which is compressed the flexible conduit 65 by the pressing member 95 during operation of the peristaltic pump. The adjustment member may make it possible to adjust the pressing member 95 in an extreme position for operation of the device without dispensing cosmetic product. The user benefits, thanks to the adjustment member, from the possibility of acting on the flow rate of cosmetic product delivered at each closure of the jaws 3 and 4. The adjustment can be carried out continuously or in increments, depending on the whose adjusting member can move on the lower arm 6.

The feeding system can be made so as to cause the dispensing of a dose of product that after a predetermined number of actions of approximation of the jaws. A window may be provided, if necessary, to allow the user to view the degree of emptying of the tank 23. Alternatively, each action of approaching the jaws 3 and 4 increments a counter which is initialized at the installation of a new refill 20, this counter can be used to warn the user that the complete emptying of the tank 23 is imminent. The meter can still be used to signal to the user that the product is ready to be dispensed, when a certain number of actuations of the jaws 3 and 4 is required before the product impregnates the applicator member. , considering the dead volume that it is necessary to begin by filling before distributing the product. When the approximation of the jaws 3 and 4 is detected electrically, the counting can be performed electronically by the base station. In a further variant, the product supply system of the applicator member 15 is motor-driven by means of an electric motor housed in the arm 5, or possibly in the refill assembly 20. The refill 20 may if necessary, include an identifier recognized by the device, which allows at least one of the following additional functions: an automated adjustment of one or more operating parameters of the device as a function of knowledge by the base station of the nature of the product, which results from the recognition of the identifier, a display of information guiding the user in the operations to be performed according to the nature of the product contained in the refill 20, a knowledge of the capacity of the reservoir 23 set up and issuing a signal warning the user when the product is exhausted, assuming that the device knows the number of doses dispensed, e.g. example by counting the number of times the jaws 3 and 4 are brought together, - the passage to a predefined state of the device in the event of non-detection of the presence of the tank 23, for example the emission of a warning signal, and blocking operation in the event of non-recognition of an identifier having an authentication function. The identification of the refill 20 can be done mechanically and / or electronically. In the latter case, the refill 20 may carry an electronic chip in which are contained the useful information and one of the arms 5 or 6 of the corresponding reading means.

In the examples illustrated, the heat treatment is provided by two heating elements 120 and 122 visible in Figure 14, respectively carried by the upper arm 5 and lower 6, each having a plate defining a hot surface 125 of contact with the hair. The plates of the heating elements 120 and 122 are made of any material suitable for the treatment to be carried out, for example a metal, a ceramic or a glass. The surface condition of the plates of the heating elements 120 and 122, in the area of contact with the hair, depends on the desired treatment, and preferably the plates are smooth when the device aims to smooth the hair. The length of the plates defines the extent of the treatment area perpendicular to the direction of movement of the handpiece 2 relative to the hair. The hot surfaces 125 defined by the plates are for example flat and rectangular in outline. One of the plates is for example fixedly mounted on the corresponding arm 30 while the other is hinged, for example by means of a ball joint, so as to allow the plates to extend in parallel with each other. to one another and to a median plane of treatment in closed configuration of the jaws. Where appropriate, at least one of the plates is disposed on one of the arms 5 and 6 being supported by a spring structure. The heating elements 120 and 122 may each comprise an electrical resistance electrically powered by the base station, preferably with a temperature regulation by means of one or more sensors arranged near the heating resistors or in contact with the plates. The steam treatment is provided by means of a vaporizer member constituted by a resistive element present in an evaporation chamber fed with water by the base station. The latter may comprise an electrically driven pump, preferably peristaltic, taking the water to be sent to the handpiece 2 in a water tank. The pump is for example as disclosed in the publication FR 2 967 018. The evaporation chamber can be made in accordance with the teaching of EP 2449909A1 or otherwise, and communicate with at least one steam outlet.

The evaporation chamber is disposed on one of the arms, namely the lower arm 6 in the example in question, and the outlet of the steam is provided on the same arm 6. The output of the steam is present in the illustrated example, in the form of a ramp 128, of elongate shape in a direction parallel to the longitudinal axis X2 of the lower arm 6. The ramp 128 may comprise several steam projection orifices, for example between 6 and 10 orifices , which are preferably equidistant along the ramp 128 and each axis oriented substantially perpendicular to the median plane of treatment.

The vaporizer is electrically powered by the base station and a temperature sensor is advantageously disposed in the evaporation chamber. The base station can be made to act on the power supply of the vaporizer member to maintain the temperature of the vapor leaving the evaporation chamber at a value between 110 ° C and 130 ° C.

Preferably, as illustrated in FIG. 14, the applicator member 15 is disposed opposite a counter-support surface 130 defined by a pad carried by the lower arm 6. This counter-support surface 130 is preferably substantially semicylindrical in revolution, generatrix parallel to the longitudinal axis X2 of the lower arm 6. Alternatively, the counter-support surface 130 may be a roller. The counter-support surface 130 can help channel the steam exiting the ramp 128 to the hair.

When the jaws 3 and 4 are closed, the abutment surface 130 bears against the applicator member 15, and preferably, the abutment surface 130 slightly compresses the applicator member 15, by example over a distance k between 1 and 5 mm. The radius of curvature r of the abutment surface 130, measured around an axis parallel to the longitudinal axis of the arm, is for example between 2 and 10 mm. The counter-support surface 130 can be movable relative to the jaw 4 which carries it and its displacement can be controlled by a regulating member, for example that which makes it possible to adjust the quantity of product dispensed when the arms 5 and 6 are brought together. Preferably, this adjustment member acts on the height of the counter-support surface 130. When the adjustment member is in a position of non-actuation of the pump, the counter-support surface can reach its maximum height and thus be in a compression position of the maximum applicator member. This configuration can make it possible to wring the applicator member after use. The abutment surface 130 can be further defined by a member arranged to define a protective cover of the applicator member 15 in the absence of use. This member can then partially cover, preferably completely, the applicator member 15 to promote the preservation of the product still impregnating the applicator member 15. The handpiece 2 may comprise a comb 133, illustrated in FIG. 14, which is preferably removably attached to the lower arm 6. This comb 133 is for example made of a rigid thermoplastic material, and has an elongate shape along the longitudinal axis X2 of the lower arm 6. The presence of the comb 133 is advantageous in that it divides the wick into packets, which tends to increase the contact surface of the hair with the hot surfaces 125 and improve the smoothing action. In addition, by dividing the wick, the exchange surface with the steam and the cosmetic product is also increased, to the benefit of the effectiveness of the treatment. The comb 133 can further contribute to increasing the traction exerted on the hair, which can improve their shaping, especially in case of smoothing. The comb may also contribute to homogenizing the product deposited upstream on the hair by the applicator member 15. Preferably, the device is made so that a portion of hair engaging between the jaws 3 and 4 and moving relative thereto when the handpiece 2 is pulled from the hairline to their tip in direction D, successively undergoes exposure to the cosmetic product, passing between the applicator member 15 and the surface counter-support 130, steam by passage to the right of the steam projection ramp 128 and heat treatment by passage between the hot surfaces 125. The handpiece 2 may advantageously comprise on the top a mark, visible by the user, such as an arrow, informing it on the correct direction of movement of the device The steam treatment can improve the penetration of the product deposited upstream on the hair. The heat treatment makes it possible to dry the hair and fix their shape. Many modifications can be made to the device that has just been described, without departing from the scope of the present invention. In a variant not shown, the heating elements 120 and 122 and the associated hot surfaces 125 are absent, the device being arranged to perform only the application of the cosmetic product and the exposure to steam, for example in the context of a hair care or color treatment. The heating elements 120 and 122 may be multiple on each of the arms 5 and 6, which may allow the use, if necessary, of the handpiece 2 regardless of its direction of movement on the hair. The device can also maintain a preferential direction of movement D during the treatment, even when the heating elements 120 and 122 are multiple on each of the arms 5 or 6. The heating elements 120 and 122 carried by the same arm 5 or 6 can comprise plates of identical width and operate simultaneously.

In order to obtain a symmetrical treatment irrespective of the direction of movement, the device may comprise two steam outlets on either side of the cosmetic product application member and between the hot surfaces 120 and 122.

In the presence of multiple heating elements 120 and 122 on each of the arms 5 and 6, the cosmetic product application member 15 can be arranged outside the heating elements 120 and 122, only one steam outlet being present between the plaques. The movement on the hair is preferably carried out so as to ensure the deposition of the cosmetic product first. In a non-illustrated variant, at least one of the heating elements 120 and 122 is made so as to be able to turn in contact with the hair when the handpiece 2 is moved along the wick to be treated, and is for example under the shape of a rotating cylinder. The other heating element 120 and 122 may have a concave curved shape adapted to receive the roll when the jaws 3 and 4 are brought together. The direction of vapor projection may be non-perpendicular to the median plane of treatment, to increase the area impacted by the jet of steam, with an inclination relative to the normal of 0 to 20 ° for example. The jet exiting each exit port of the ramp (also called nozzle) may be sufficiently divergent to lead to a substantially uniform exposure of the wick in the direction of its width. The device according to the invention is preferably used with a base station; alternatively, the handpiece 2 is autonomous, including the water supply necessary for the production of steam. The cosmetic product applied by the device according to the invention can be any type of hair product. By capillary cosmetic product, is meant a composition comprising one or more active substances for capillary use and in particular a product as defined in the EC Directive 93/35 of June 14, 1993. Water in liquid or gaseous form which contains no additives for capillary use does not constitute a cosmetic product within the meaning of the present invention. The cosmetic product may be intended to facilitate the shaping of the hair. Examples of assets are given for example in the publication US 2010/0307528 A1 in paragraphs [0031] and [0032]. The product may be aqueous or non-aqueous based. In the examples which have just been described, the cosmetic product is not heated other than by the heat losses due to the presence of the heating elements 120 and 122 and the projection of steam between the jaws 3 and 4. In a variant, the cosmetic product is heated by a specific heating means, so as to raise its temperature before its application, for example a screen printed heating resistor on a sleeve traversed by the product or disposed on the reservoir or in contact with it. This rise in temperature may have the effect of reducing its viscosity and facilitate its application. The applicator member 15 may be made otherwise than with a foam, for example with a felt, a sinter or a brush. Because of the longitudinal configuration of the refill 20, the dispensing of product through dispensing orifices 68 of constant size and equal distribution is not uniform. The dispensing orifices 68 near the reservoir 23 are subjected to a greater pressure than those situated at its end and, as a result, open more, distributing more product towards the applicator member 15. The variants below allow the product distribution towards the applicator member 15 to be uniform along the dispensing nozzle 53. The dispensing orifices 68 of the dispensing nozzle 53 are, alternatively, as illustrated in FIG. 15, spaced apart. of variable distance, the density of dispensing orifices 68 then varying with the position on the dispensing nozzle 53. Preferably, the density of dispensing orifices 68 increases away from the reservoir 23 to allow dispensing of product uniformly towards the applicator member 15. The dispensing orifices 68 of the dispensing nozzle 53 are, again alternatively as illustrated in FIG. 16, of variable length p as a function of their position on the dispensing nozzle 53. Preferably, the length p of the dispensing orifices increases away from the reservoir 23 to allow a uniform product distribution in the direction of the applicator member 15. The counter-support surface 130 is, alternatively, inclined obliquely with respect to the applicator member 15 so as to exert a variable pressure on the applicator member 15. Preferably, the pressure exerted by the abutment surface 130 on the applicator member 15 increases away from the reservoir 23, to allow a uniform application of product on the lock of hair introduced between the upper arm 5 and lower 6.

The device can be used by moving the jaws 3 and 4 along a wick, to smooth the hair. The device can also be used by winding the wick around a jaw 3 or 4 and by dragging it by sliding on the jaw 3 or 4, to curl the hair. The device can be used hot without producing steam or without activating the heating elements 120 or 122.

Alternatively, the steam outlet and the applicator member 15 occupy substantially the same position relative to the direction of movement D on the lock of hair of the device. In this case, or the steam outlet orifices are for example formed through a counter-bearing surface on which the applicator member 15 applies when the jaws 3 and 4 are closed.

In the illustrated examples, the steam generation is on the lower arm 6 and the product application on the upper arm 5. This provision can be reversed. The distributor nozzle 53 may be non-deformable and the product may be dispensed only during the movement of the jaws 3 and 4 approaching together. A deformable product accumulation chamber may also be inserted in the product path between the conduit 65 and which apply the pressing element 95 and the dispensing nozzle 53, this chamber being for example formed by a section of deformable pipe or by a deformable or mobile membrane without proper elasticity but bearing against an elastic return member which is deforms to accompany the increase in volume and generates the pressure necessary to continue the distribution of the product once the jaws 3 and 4 close together. The housing of the device receiving the refill may comprise at least one light source. This source can allow the user to visualize the presence of the refill during the operation of the device When the refill is at least partially made of a material to see the cosmetic product contained therein, the light source can facilitate the determination by the use of the level of cosmetic product remaining in the refill. Thus, it may be advantageous to perform the refilling with at least a portion of the reservoir in a transparent or translucent material, and to arrange the light source so as to illuminate the reservoir. Alternatively, the refill 20 may be provided with a removable closure member, not shown, to be placed on the applicator member 15 in the absence of use. This closure member may be adapted to be placed on the applicator member 15 before or after the introduction of the refill 20 into the handpiece 2, for example consisting of a cover arranged to be fixed hermetically on the handpiece 2 or the refill 20. Alternatively, the closure member is a cap to be removed at the first use of the handpiece 2 or during the introduction of the refill 20 in the handpiece 2. In a variant not shown, the upper arm 5, in particular the jaw 3, comprises a pivoting flap 18 which can take the open configuration allowing the introduction of a refill 20 according to the invention and the removal of the latter. once the product is exhausted, and a closed configuration of use of the device to treat the hair. In a variant not shown, one of the flange 35 and the upright 36 has a recess for receiving at least one relief carried by the other of the flange 35 and the upright 36 and / or one of the top of the jaw 3 and of the plane extension 41 may have a recess for receiving at least one relief carried by the other of the top of the jaw 3 and the extension 42. The presence of the recess and the complementary relief may allow to block the refill in position to prevent it from sliding out of the jaw. In a variant not shown, the refill comprises a valve pump and the handpiece is made to actuate this valve pump, for example when the two arms are close to each other or alternatively to the using an actuating member that can be actuated by the user regardless of the approximation of the arms. The valve pump may comprise a membrane which is positioned facing an actuating member, which is for example adjustable in height so as to act on the amount of product delivered by the pump at each actuation. The valve pump comprises a body made in one piece with tips for connecting respectively to the reservoir and the nozzle. The valve pump comprises a pumping chamber delimited in part by the membrane. The connection end to the reservoir can accommodate an inlet valve which opens when the volume of the pumping chamber increases and which closes when this volume decreases during actuation of the membrane. The pump may also include an outlet valve which can be integrated with the pump, being for example located at the connection end of the conduit. A backflow valve may be present between the reservoir and the pumping chamber, opening in the direction of a flow from the reservoir to the pumping chamber. In a variant, the outlet valve is constituted by the dispensing nozzle orifices of the dispensing nozzle, which open under the effect of product pressure upstream and close again when the pressure has decreased, thanks to the own elasticity of the material in which the duct is made. When the membrane is deformed by pressing on the actuating relief of the lower arm, the internal volume of the pumping chamber decreases. The inlet valve is closed and the product is driven towards the dispensing nozzle. The outlet or openings may open under the effect of the pressure of the product and then close when the pressure decreases following evacuation of the product. When the actuating relief moves away from the membrane, it resumes its original shape by its own elasticity, which causes the volume of the pumping chamber to increase, which resumes its initial volume. The corresponding depression causes the opening of the inlet valve and the admission of product from the reservoir. The phrase "having one" shall be understood as being synonymous with "having at least one" and in all the ranges of values indicated, the markers are included.

Claims (29)

REVENDICATIONS1. Refill (20) for a hair treatment apparatus, extending along a longitudinal axis (Xrech) and comprising: - a reservoir (23) containing a hair product, and - a dispensing tip (53) of the product contained in the reservoir (23), the dispensing nozzle (53) having at least one portion extending axially between the abscissae (xi, x2), on the longitudinal axis (Xrech), of the inner longitudinal ends of the reservoir (23), this portion being fed through a feed passage (41) extending between said abscissae (xi, x2) and between the reservoir (23) and the dispensing tip (53), said feed passage (41) being directed to less partially transverse to the longitudinal axis (Xrech). 2. Refill according to claim 1, the dispensing nozzle (53) having at least one dispensing orifice (68) of the capillary product does not open into the reservoir (23). 3. Refill according to claim 1 or 2, the feed passage (41) being of axis (Y) perpendicular to the longitudinal axis (Xrech). 4. Refill according to any one of the preceding claims, the feed passage (41) being located in the first or last quarter of the length of the reservoir (23). 5. A refill according to any one of the preceding claims, comprising a rigid or semi-rigid body (25) having a first (27) and a second housing (29) separated by a dividing wall (31), the first housing (27). ) containing the dispensing nozzle (53) and the second housing (39) containing the reservoir (23) or at least partially defining it, the supply passage (41) being formed through the separating wall (31). 6. Refill according to claim 5, the refill (20) having a vent (95) opening into the second housing (29) for putting the reservoir containing the capillary product at atmospheric pressure. 7. Refill according to any one of the preceding claims, the reservoir (23) being of variable internal volume. The refill according to any one of the preceding claims, being longer than it is thick. 9. Refill according to any one of the preceding claims, the dispensing nozzle (53) being connected to the reservoir (23) via a flexible conduit (65). 10. Refill according to any one of the preceding claims, the dispensing tip (53) being pre-filled with the hair product. 11. Refill according to any one of the preceding claims, the capacity of the reservoir (23) being between 3 ml and 20 ml. 12. Refill according to any one of the preceding claims, the dispensing nozzle (53) having at least one dispensing orifice (68), better a plurality of dispensing orifices (68), preferably constituted by less a slot, better a plurality of contiguous edges at rest, including distribution orifices (68) made through a deformable wall, preferably a wall defined by a portion of flexible conduit (65). 13. Refill according to any one of the preceding claims, the reservoir (25) being in the form of a flexible bag (73). 14. Refill according to claims 5 and 13, the flexible bag (73) being fixed in at least two separate locations (75) on a wall at least partially defining the second housing (29), in particular on the separating wall (31). 15. Refill according to any one of the preceding claims, the reservoir (23) being delimited at least partially by a flexible membrane (73) and a rigid or semi-rigid body (25), including in particular a separating wall (31) of the dispensing nozzle (53) and the reservoir (23). 16. Refill according to claims 3 and 15, the second housing (29) having a wall having at least one groove (54) opening on the supply passage (41), to facilitate the circulation of the capillary product within the reservoir ( 23) to the feed passage (41), especially when the flexible membrane (73) tends to press against the separating wall (31). 17. Refill according to any one of the preceding claims, the feed passage (41) being defined at least partially by a conduit (65) open at its end opening into the reservoir (23) and on the side, in particular provided laterally. at least one slot or notch (70). 18. Refill according to claims 9 and 17, the duct (65) extending to the dispensing nozzle (53), the latter being preferably made from an extension of said duct (65). 19. Refill according to any one of the preceding claims, comprising an application member (15) supplied with product by the dispensing nozzle (53), the application member (15) preferably covering at least partially the dispenser tip (53), the applicator member (15) preferably comprising a porous material and / or capable of salting out or diffusing the cosmetic product, in particular an open cell foam. 20. Refill according to any one of the preceding claims, the refill (20) comprising one or more components of a pump supplying the dispenser nozzle (53) with product from the reservoir (23), in particular at least one peristaltic pump hose and / or a valve pump. 21. Refill according to claims 9 and 20, the peristaltic pump pipe being constituted by a portion of said flexible conduit (65). 22. Refill according to any one of the preceding claims, comprising a closure member of the refill (20) in the absence of use. 23. Refill according to any one of the preceding claims, being devoid of pivoting flap for access to the reservoir (23). 24. A device (2) for treating the hair, comprising: - at least two arms (5, 6) movable relative to one another between a close configuration of treatment of the hair and a configuration of engagement between and at the front of the device of a lock of hair to be treated, - a refill (20) according to any one of the preceding claims, the refill (20) being removably arranged on one of the two arms ( 5; 6). 25. Device according to claims 20 and 24, the approximation of the arms (5,6) actuating said pump. 26. Device according to claim 24 or 25, the refill (20) having a length Lrech less than or equal to two-thirds of the length of the arm Lbr, better than or equal to half the length of the arm Lbr, the refill (20). ) being located at the front of the device (2). 27. Device according to any one of claims 24 to 26, the arm (5; 6) carrying the refill extending along a longitudinal axis (Xbr), the arm (5; 6) and the refill (20) s' extending along respective longitudinal axes (Xbr, Xrecb) parallel to each other. 28. Hair treatment device, comprising: - at least two movable arms (5, 6) relative to each other between a close configuration of treatment of the hair and a configuration apart from engagement between them and to the front of the device of a lock of hair to be treated, one of the arms (5; 6) having a base having a housing (38) opening at the distal end of the arm (5; 6) and opening on to at least a part of its length facing the other arm (6; 5) when the two arms (5, 6) are in close configuration, - a refill (20) according to any one of claims 1 to 23, the refill (20) being removably disposed in the housing (15), the refill (20) being introduced into the housing (38) at one end by a sliding movement along its longitudinal axis (Xrecb). 29. Device according to any one of claims 24 to 28, being a straightener, each of the two arms (5, 6) having a heating element (120, 122), the heating elements (120, 122) each comprising, preferably , a plate defining a hot surface (125) for contact with the hair.