WO2023126600A1

WO2023126600A1 - Heating hairstyling appliance having bristles arranged in rows

Info

Publication number: WO2023126600A1
Application number: PCT/FR2022/052487
Authority: WO
Inventors: Thierry Planterose; Johan Sabattier
Original assignee: Seb S.A.
Priority date: 2021-12-30
Filing date: 2022-12-22
Publication date: 2023-07-06
Also published as: FR3131516B1; FR3131516A1

Abstract

- The invention relates to a hairstyling appliance comprising a head (3) for engagement with a user's hair, the head being provided with bristles, including heating bristles (70) for transmitting heat to the hair and insulating bristles (72) for keeping the heating bristles away from the scalp. The bristles are arranged in rows parallel to a longitudinal direction (X-X') and comprise a primary row that includes a plurality (70A) of the heating bristles and a secondary row (R2) that includes a plurality (72A) of the insulating bristles, said rows being adjacent and longitudinally offset so that the heating bristles of the primary row are not aligned with the insulating bristles of the secondary row in a transverse direction perpendicular to said longitudinal direction (X-X'). - Hairstyling appliances

Description

HEATED STYLING APPLIANCE WITH BRUSHING PINS ORGANIZED BY ROWS

TECHNICAL AREA

The present invention relates to the general technical field of hairdressing appliances, for example for domestic use, intended to provide shaping, embellishment and / or improvement of the health of the hair, and more specifically to the field of electric portable hairdressing appliances such as hairdressing brushes, straightening brushes, detangling brushes or hair straighteners.

[0002] The invention relates more specifically to a hairdressing appliance comprising at least one head for engaging the hair of a user, said head being provided with brushing pins including at least heating pins for transmitting heat to the hair and insulating spikes for keeping said heating spikes away from the user's scalp, said brushing spikes being organized in at least a plurality of rows substantially parallel to a longitudinal direction.

PRIOR TECHNIQUE

[0003] Hairdressing appliances are known which make it possible to subject the hair to a mechanical and thermal treatment. This thermomechanical treatment is for example carried out by means of a brush comprising heating pins carried by a brush head. Some models are also provided with means for spraying water vapour. The mechanical brushing action, associated with the thermal action provided by the heating pins, and if necessary with the fluidic action of the steam, facilitates the styling operation and improves its efficiency. , while preserving, at least to some extent, the appearance of the hair. In addition to the aforementioned heating pins, these known heated brushes are also provided with simple, non-heating brushing pins, the size of which is greater than that of the heating pins in order to keep the latter away from the scalp of the user, which minimizes the risk of burns and discomfort. [0004] These known devices do not, however, make it possible to achieve an optimal result, in particular because of a heat transfer between the heating pins and the hair which may prove to be insufficient, or in any case which is far from being ideal.

DISCLOSURE OF THE INVENTION

[0005] The objects assigned to the invention therefore aim to propose a new hairdressing device whose design allows optimal heat transfer between the device and the hair, thus facilitating the effects of styling and shaping the hair, while significantly improving their appearance.

[0006] Another object of the invention aims to provide a new hairdressing appliance which makes it possible to significantly reduce the density of surface defects of the hair, and to improve its shine.

[0007] Another object of the invention aims to provide a new hairdressing device that is particularly safe and comfortable to use.

[0008] Another object of the invention aims to provide a new hairdressing device of particularly simple, reliable and compact construction.

[0009] Another object of the invention aims to provide a new hairdressing appliance of light and economical design.

[0010] Another object of the invention aims to provide a new hairdressing appliance making it possible to ensure, in a simple and rapid manner, simultaneously disciplining the hair, or even disentangling and/or shaping, and a hair beautification.

[0011] Another object of the invention aims to provide a new hairdressing device whose energy consumption is optimized.

[0012] Another object of the invention aims to provide a new hairdressing appliance whose design makes it possible to subject the hair in a particularly effective manner to a flow of steam. [0013] Another object of the invention aims to provide a new hairdressing appliance whose design makes it possible to reduce the risk of burns and discomfort.

[0014] The objects assigned to the invention are achieved with the aid of a hairdressing appliance comprising at least one head for engaging the hair of a user, said head being provided with brushing pins including at least heating pins for transmitting heat to the hair and insulating pins for keeping said heating pins away from the user's scalp, said brushing pins being organized in at least a plurality of rows substantially parallel to a longitudinal direction, said hairdressing device being characterized in that said rows comprise at least a first primary row which includes at least a first plurality of said heating pins, as well as a first secondary row which includes at least a first plurality of said insulating pins, said first primary and secondary rows being substantially adjacent and offset longitudinally so that heating pins of said first primary row are not aligned with insulating pins of said first secondary row in a transverse direction substantially perpendicular to said longitudinal direction, said head preferably being provided with a plurality of steam ejection ports for subjecting said hair engaged by said head to a stream of steam.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the invention will appear and emerge in more detail on reading the description given below, with reference to the accompanying drawings, given solely by way of illustrative and non-limiting examples, among which :

- Figure 1 is a schematic perspective view of a hairdressing appliance according to the invention, consisting in this case of a hairdressing brush;

- Figure 2 is an exploded view of the hairdressing appliance of Figure 1;

- Figure 3 is a schematic perspective view of the head of the device of the previous figures; - Figure 4 is a schematic top view of the head of a hairdressing device according to the invention, consisting in this case of a hairdressing brush, which differs from the device of Figures 1 to 3 essentially by a slightly different configuration (one row on each side instead of two alternate rows) of the lateral disentangling pins which surround the main brushing zone, which is identical to that of the brush of FIGS. 1 to 3;

- Figure 5 is a schematic front view of a detail of the head of Figure 3 or that of Figure 4;

- Figure 6 illustrates in isolation, in a schematic perspective view, a one-piece plastic part which contributes to form the head of Figure 3 or that of Figure 4 and which form part of the insulating pins;

- Figure 7 illustrates in isolation, in a schematic perspective view, a one-piece piece of aluminum or cast aluminum which contributes to forming the head of Figures 3 or that of Figure 4 and of which heating pins and steam pins;

- Figure 8 is a graph schematically illustrating an example of the evolution of the mass flow rate of the flow of water vapor emitted by a hairdressing appliance in accordance with the preceding figures over time, in a transient mode of operation which follows the start of the device, then in an operational mode of operation which follows the transient mode of operation.

BEST WAY TO REALIZE THE INVENTION

[0016] The hairdressing appliance 1 in accordance with the invention is preferably portable, that is to say that at least part, and preferably all, of the appliance 1 is designed to be gripped and handled by hand. The hairdressing appliance 1 is preferably a portable electric appliance, intended to be connected to the electricity distribution network in order to be electrically supplied. It is however alternatively conceivable, without departing from the scope of the invention, that the device 1 embeds electrical supply batteries, possibly rechargeable. Hairdresser 1 is preferentially designed for use in a domestic setting, and is intended to provide hair shaping, and/or hair beautification and/or hair health improvement. Preferably, the hairdressing device 1 is designed so that the user uses the hairdressing device 1 on himself, that is to say on his own hair. However, it is perfectly possible for the hairdressing appliance 1 to be designed for use by the user on the hair of a third person (or other user). Preferably, the hairdressing appliance 1 is intended for use in a domestic setting by a user (woman or man) lacking particular professional skills in hairdressing. In the embodiment illustrated in the figures, the hairdressing appliance 1 constitutes a hairdressing brush. The invention is however not limited to a hairdressing appliance 1 forming a hairdressing brush, and the hairdressing appliance 1 can for example constitute a smoothing brush, a detangling brush or a straightener, without however out of the scope of the invention.

[0017] As illustrated in the figures, the hairdressing device 1 advantageously comprises a handle 2 for manual gripping, which is intended to be gripped by hand, and for example grabbed, by the user, to manipulate the hairdressing device. 1 . The handle 2 extends for example longitudinally substantially parallel to a longitudinal direction materialized by a central longitudinal axis X-X', between a first end from which emerges for example an electric power cable, and a second opposite end .

[0018] The hairdressing device 1 comprises at least one head 3 to engage the hair of a user, that is to say to preferably come into contact with the hair in order to subject it to a mechanical, thermal and thermal action. /or fluidic. The head 3 is advantageously carried by said handle 2, and extends for example longitudinally, in said longitudinal direction X-X', between a rear end fixed to the second end of the handle 2, and a free front end. Preferably, as illustrated in the figures, the handle 2 has a substantially elongated shape which is extended by the head 3, which is advantageously wider than the handle 2 and has for example a substantially oblong general shape. Preferably and as illustrated, the handle 2 and the head 3 are formed, at least in part, by a main body in one piece, of the box type, for example made of plastic material. head 3 advantageously has, as illustrated in the figures, a front face 3A intended to be opposite the hair when the latter are engaged by the head 3.

[0019] According to the invention, the head 3 is provided with brush pins 7, between and against which the hair is intended to be located and to move, when using the hairdressing appliance 1. Advantageously, as illustrated in the figures, the brushing pins 7 are arranged on the side of the front face 3A, and preferably come from the latter, from which they protrude.

The brush pins 7 include at least heating pins 70 (shown in isolation in Figure 7) to transmit heat to the hair engaged by the head 3. The heating pins 70 thus form a heating element 4 intended to come to the contact with the hair, to transmit heat to them during the brushing operation by means of the brushing pins 7 of which the heating pins 70 form part. For example, the height of the heating pins 70 is between approximately 6 mm and 15 mm, and even more preferably is between about 8 mm and 12 mm, even more preferably between 10 mm and 12 mm. Advantageously, the heating pins 70 are formed by a single and same first one-piece piece 700 (shown in isolation in FIG. 7) which is made of metal, for example aluminum or cast aluminum, and which is advantageously obtained by molding and/or or machining a metal primary block (preferably aluminum or cast aluminum). Advantageously, the heating pins 70 are anodized, to enable them to retain a smooth surface even when their temperature is high. Preferably, said one-piece piece 700 of aluminum which forms the heating pins 70 is placed in contact with a second heating device 40, formed for example by resistive elements capable of heating by Joule effect, said resistive elements being in contact with said one-piece piece 700 (from which the heating pins 70 originate) to heat the latter at least by thermal conduction. The second heating device 40 can be formed, for example, by one or more resistive elements capable of heating by Joule effect (for example one or more heating elements, or thermistor(s), with a “Positive Temperature Coefficient” (PTC) ).

[0021] The supply of heat from the heating pins 70, associated with the mechanical brushing action, facilitates the shaping of the hair, and also makes it possible to beautify and to treat them, by remedying the surface defects which the hair may be afflicted with. This concerns in particular defects classified according to the following four categories:

- class A: dark spots in the middle of the scales;

- class B: semi-circular white areas, generally located mainly at the extremities of the scales, and corresponding to detachments or lifting of the scales;

- class C: appearance of the endocuticle following tearing of the upper parts of the scales;

- class D: type III notches, parallel to the axis of the hair and due to cracking of the cuticle.

As illustrated in the figures, the brushing pins 7 also include insulating pins 72 to keep said heating pins 70 away from the user's scalp. To this end, said insulating pins 72 are preferably higher than the heating pins 70, so that they prevent the heating pins 70 from coming into contact with the scalp when the brush is pressed against the latter on the side of the front face 3A . For example, the height of the insulating pins 72 exceeds by at least 2 mm, and preferably by at least 3 mm, even more preferably by approximately 3.5 mm, the height of the heating pins 70. Such a differential of height allows an excellent compromise between the rigidity of the insulating pins 72 on the one hand and the safety of use on the other hand.

[0023] Advantageously, each of said insulating pins 72 has substantially a shape of revolution, with for example a substantially frustoconical main body which rises between a base and a top, the latter preferably being provided with an enlarged and rounded head, substantially spheroidal, as shown. Such a geometry makes it possible to protect the scalp and to obtain an optimal detangling effect. Preferably, said insulating pins 72 are formed by a single and same second one-piece piece 701, illustrated separately in FIG. 6, for example in plastic material, and even more preferably in hard plastic, of the polyurethane or PPS type phenylene), advantageously polished, which has a particularly smooth surface while being resistant to high temperatures. The choice of a subject plastic also makes it possible to benefit from lesser thermal conduction properties than that of a metal such as aluminum or cast aluminum, which advantageously forms the first one-piece part 700 from which the heating pins 70 originate. This allows the insulating pins 72 to play their role as a thermal insulator in a particularly effective way. Preferably, the second one-piece part 701 from which the insulating pins 72 originate and the first one-piece part 700 from which the heating pins 70 originate are superimposed, with the second one-piece part 701 forming the insulating pins 72 placed on and against the first one-piece part 700 forming the heating pins 70, the latter protruding through openings 701 A provided through the second one-piece part 701 .

[0024] Advantageously, the hairdressing appliance 1 comprises, in addition to the heating element 4 formed by the heating pins 70, means for emitting steam, and preferably steam, configured to subject to a flow of steam (preferably steam) the hair in contact with the heating element 4. More specifically, the head 3 is advantageously provided with one or more steam ejection orifices 710, belonging to said emission means of steam, to subject the hair engaged by the head 3 to a flow of steam. In other words, the hairdressing device 1 is, in this preferred embodiment, designed so that hair is simultaneously:

- in contact, at least locally, with said heating element 4,

- and subjected, at least locally, to a flow of steam emanating from the steam ejection orifices 710, during the styling operation, during which the head 3 engages said hair, for example to brush it, preferably by means of the aforementioned brushing pins 7 of which the said heating pins 70 and insulating pins 72 form part.

[0025] The term “steam” must here be taken in an extensive sense and thus denotes either:

- a substance (preferably water) in gaseous state, or

- said substance (preferably water) in a liquid state in the form of a mist of droplets and/or microdroplets, or - a mixture of said substance (preferably water) in the gaseous state and of said substance (preferably water) in the liquid state in the form of a mist of droplets and/or microdroplets .

[0026] In other words, the expression "water vapour" should not be limited to its strictly scientific definition and here covers water in the gaseous state, the particles of liquid water in suspension in the air, or a mixture of gaseous water and liquid water particles (droplets) suspended in the air. The term "water" can mean any liquid containing mainly water (that is to say at least 50% by weight of water, and preferably at least 80% by weight of water, even more preferably at least 95% by weight of water) and capable of being transformed into steam, and thus includes distilled water, running tap water, but also various aqueous solutions containing elements cosmetics, olfactory, etc.

[0027] Said means for emitting steam (preferably steam) comprise for example, as illustrated:

- a device 5 for vaporizing liquid (preferably water) for generating from liquid, preferably from liquid water, said flow of vapor (preferably water vapour) intended to be directed towards and on the hair;

- a supply device 6 for supplying liquid, preferably liquid water, to the vaporization device 5.

The vaporization device 5 comprises for example a vaporization chamber 50 provided with an inlet 501 for supplying liquid and at least one outlet 502 for steam. Preferably and as illustrated, the vaporization device 5 also comprises a first heating device 51 designed to heat the vaporization chamber 50 and thus transform, within the vaporization chamber 50, the liquid water into water vapour. The first heating device 51 is formed for example by resistive elements capable of heating by Joule effect (for example one or more heating elements, or thermistor(s), with a “Positive Temperature Coefficient” (PTC)), said resistive elements being advantageously in contact with said vaporization chamber 50. Said vapor outlet 502 is for its part advantageously in fluid communication with the surrounding outside air, preferably permanently, preferably via at least one vapor ejection orifice 710 arranged on the side of the front face 3A, as will be described in more detail below. For example, the said vapor ejection orifice(s) 710 is (are) in fluid communication with the interior of the vaporization chamber 50 via a vapor channeling device 52 connected from a side to the outlet 502 and on the other side to said at least one orifice 710 for steam ejection. Preferably, as in the embodiment illustrated in the figures, the second heating device 40 of the heating element 4 is separate from said first heating device 51 of the vaporization chamber 50.

In the preferred embodiment illustrated in the figures, the vaporization chamber 50 is permanently maintained at atmospheric pressure, which avoids having to resort to an outlet valve, due to the absence of a rise in pressure of the vapor. within the chamber 50 and the device 1 . Among the advantages of such a design, we can note the absence of risk of overpressure (and therefore the absence of the need to have means to prevent or manage such overpressures), as well as a lower risk of ejection of a stream of steam at too high a temperature which could damage and/or burn the hair. Indeed, due to the absence of pressurization of the chamber 50, the temperature of the water vapor flow does not substantially exceed 100°C.

[0030] Said supply device 6 for its part comprises, for example, a reservoir 60 for storing a quantity of liquid (preferably liquid water) and a pump 61 connected to said reservoir 60 and to said vaporization device 5. The reservoir 60 is for example removable, that is to say it is detachable from the main body of the device 1, which makes it possible to dispense with an earth connection for the power supply of the device 1 . To this end, the tank 60 is preferably substantially at atmospheric pressure. The use of a pump 61 associated with a reservoir 60 at atmospheric pressure, rather than a pressurized reservoir associated with a valve, also allows optimum safety of use and increased reliability in terms of controlling the flow rate. Preferably, said pump 61 is a peristaltic pump, which allows very fine control of low flow rates and guarantees relatively constant flow rates. The device 1 is therefore designed, in the preferred embodiment illustrated in the figures, to subject the hair engaged by the head 3 to a thermomechanical steam treatment, according to which the hair is simultaneously subjected to:

- A mechanical action, due to the brushing effected by the displacement of the front face 3A (from which brushing pins 7 preferably protrude) on and against the hair;

- a thermal action, by contact and/or proximity with the heating element 4, which is advantageously carried by the head 3;

- and a fluidic action, which is in this case a steam treatment, consisting in subjecting the hair engaged by the head 3 and in contact with the heating element to steam (preferably steam) 4, advantageously via the orifice(s) 710 for steam ejection/steam pins 71 which will be described below.

[0032] The simultaneous implementation, and advantageously combined, of these three treatments (mechanical, thermal and steam) advantageously makes it possible to beautify, and/or to treat, and/or to repair the hair, and advantageously also allows the shaping the hair, in particular by disciplining it, in particular under the specific conditions described below.

[0033] Advantageously, the brushing pins 7 include, in addition to the heating pins 70 and the insulating pins 72, a plurality of steam pins 71 which each incorporate at least one respective one of said orifices 710 for ejecting steam. In other words, each steam pin 71 incorporates a steam ejection orifice 710, which is advantageously connected to a source of steam, formed for example by the steaming device 5 and the supply device 6 associated described in the foregoing. Said steam pins 71 thus contribute to forming said steam emission means. To this end and as previously explained, each vapor ejection orifice 710 is advantageously in fluid communication with the interior of the vaporization chamber 50 via the channeling device 52. The steam pins 71 thus assume, in more than their mechanical brushing function, a steam sprayer function, that is to say that each steam pin 71, with its steam ejection orifice 710, advantageously forms a steam projection nozzle (of preferably water vapour). Thus, thanks in particular to the steam pins 71, the mechanical treatment of the hair, under the effect of a resistive force generated by the hair against the steam pins 71 is advantageously combined with a fluidic treatment of the hair (supply of steam via the steam ejection orifice 710 of the steam pins 71). The term “combined” is understood here in the sense of simultaneous performance of said mechanical and fluidic treatments on the same zone of hair. Thus the same portion of lock of hair will undergo simultaneously, that is to say concomitantly, both a fluidic treatment and a mechanical treatment. This makes it possible to obtain a "double" action combined and concentrated on the same area of hair. This makes it possible to increase the effectiveness of the treatment, and to obtain excellent results in terms of styling, beautifying and caring for the hair, while minimizing the number of necessary passages of the hairdressing device 1 against the hair.

Preferably, the steam pins 71 are integral with the heating pins 70, that is to say that in this case the steam pins 71 and the heating pins 70 are advantageously formed by a single piece in one piece. For example, the steam pins 71 and heating pins 70 are formed by said first one-piece part 700 (shown in isolation in FIG. 7) mentioned above. Advantageously, the steam pins 71 are, like the heating pins 70, anodized, to allow them to retain a smooth surface even when their temperature is high.

Preferably, each steam pin 71 is formed by a respective one of said heating pins 70. In other words, in this advantageous embodiment, some of the heating pins 70 are provided with an orifice 710 of ejection of steam, in order to form a steam pin 71 . In this case, the steam pins 71 also play the role of heating pins, in addition to their steam diffusion function, and they too are advantageously heated at least by thermal conduction by means of the second heating device 40 mentioned above. This means that the steam pins 71 contribute, in this preferred embodiment, to forming both the heating element 4 and the means for emitting steam (preferably steam). Thus, thanks to said steam pins 71, the mechanical treatment of the hair, under the effect of a resistive force generated by the hair against the steam pins 71 is, even more advantageously, combined not only with a fluidic treatment of hair (steam supply via the steam ejection orifice 710 of the steam pins 71 contributing to form the steam emission means) as mentioned previously, but also with a heat treatment of the hair (heat supply via the pins steam 71 contributing to form the heating element 4). Thus the same portion of lock of hair will undergo simultaneously, that is to say concomitantly, both a mechanical treatment, a fluidic treatment, and a heat treatment. This makes it possible to obtain a "triple" action combined and concentrated on the same area of hair. This makes it possible to further increase the effectiveness of the treatment of the hair by the hairdressing device 1, and thus to obtain even better results in terms of hairdressing, embellishment and care of the hair, while further minimizing the number necessary passages of the hairdressing device 1 against the hair.

Advantageously, each of said heating pins 70 and/or said steam pins 71 has, in cross-section, a substantially oblong shape, as illustrated in the figures. Thanks to this oblong shape, which gives the pins concerned (heating pins 70 and/or steam pins 71) a substantially flattened shape, in the shape of a paw, the heat exchange with the hair is optimized since the shape of the heating pins 70 provides a maximum exchange surface during the passage of the hair against the pins.

As explained above, the steam pins 71 also preferably play the role of heating pins, so that in this case it is preferable that they also have in cross section said substantially oblong shape referred to above. In any case, each steam bar 71 preferably has, as shown in the figures, a substantially flattened shape with two opposite faces, separated by the thickness of the steam bar 71, said steam ejection orifice 710 opening on at least one of said two opposite faces, and preferably on said two faces, in which case the steam is projected on each side of the steam pin 71, which makes it possible to improve the diffusion of the steam within the wicks of hair. Thanks to this specific arrangement of the steam ejection orifice 710, which opens onto at least one of the faces of the steam pin 71, that is to say substantially perpendicular to the axis of longitudinal extension of the steam pin 71 in question, the steam leaves the steam pin 71 with an incidence which is substantially parallel to the mean plane of the front face 3A, which not only makes it possible to reduce the risk of burns the scalp during use, but also ensures a particularly effective projection of water vapor since it makes it possible to treat the locks of hair on their height. In order again to improve the diffusion of steam within the hair, with a view in particular to subjecting locks of hair to the flow of steam over their entire height, each steam ejection orifice 710 is preferably provided over at least half , and preferably over at least two-thirds, of the height of the steam bar 71 which incorporates it. For example, each vapor ejection orifice 710 extends longitudinally, in the form of a single opening or of a plurality of stepped openings, over a height advantageously comprised between 3 mm and 15 mm, even more preferably between 7 mm and 10 mm, and for example over a height of approximately 8 mm. Thanks to this technical feature, the entire lock of hair being brushed can be subjected to the flow of steam, which allows effective treatment, particularly in terms of correcting hair surface defects and improving their shine.

[0038] The hairdressing appliance 1 is advantageously designed to be in an operational operating mode EN, that is to say a normal, nominal operating mode, in which the operating parameters of the hairdressing appliance 1, and possibly all the operating parameters of the hairdressing device 1, are, in the absence of positive intervention by the user, substantially constant, or do not vary according to a large amplitude, or even vary automatically according to a predefined and advantageously periodic pattern (sinusoidal or crenellated for example) which can correspond for example to a pulsed vapor flow. In other words, the operational operating mode EN corresponds to a stationary, cruising regime of the hairdressing device 1 . Before being in the operational operating mode EN in question, the device 1 is for example designed to be in a transient operating mode ET during which one, or several, or all of the operating parameters of the device hairstyle 1 evolve, preferably continuously and gradually, until they reach, for example, their nominal values corresponding to the aforementioned operational mode of operation EN. Thus, when starting up the device 1, which corresponds for example to a power supply of the latter (preferably controlled by a switch), the device 1 is first of all in the transient operating mode. AND, during which the heating element 4 gradually rises in temperature, as do the dedicated organs of the means emission of water vapor (first heating device 51). The transient operating mode ET is then followed by the operational operating mode EN, in which the device 1 remains until it is, for example, switched off (end of electrical power supply) by the user. The transition from the transient operating mode ET to the operational operating mode EN is preferably carried out automatically, without positive intervention by the user, who can however be warned of reaching the operational operating mode EN by any suitable signaling means. (light / or sound signal, burst of steam, etc.). For example, the device 1 is in the operational mode EN once a predetermined time has elapsed from the start-up (power supply) of the device 1. The predetermined time in question, which may possibly depend on certain technical characteristics of the device 1 (electrical power for example) is advantageously between 10 s and 60 s, without this range being of course limiting.

Advantageously, when the device 1 is in the operational operating mode EN, said heating pins 70 have a first surface temperature (that is to say a surface temperature), the value of which is for example at at least equal to 110° C., while the flow of steam (preferably steam) emitted by the steam ejection orifices 710 has a mass flow whose value is at least equal to 0.5 g/min (grams per minute), and is preferably at least equal to 0.8 g/min. This means that in the EN operational mode in question, the surface of the heating element 4, formed by the heating pins 70 and possibly the steam pins 71 which are intended to come into contact with the hair during the engagement of the latter by the head 3, has a temperature corresponding to said first surface temperature. Simultaneously, the value of the mass flow rate of said flow of water vapor emitted by the hairdressing appliance 1, preferably at the level of the head 3, is greater than or equal to 0.5 g/min. Preferably, when the hairdressing device 1 is in the operational operating mode EN, the insulating pins 72 have a second surface temperature (that is to say a surface temperature) whose value is lower than that of said first surface temperature. Preferably, the value of said second surface temperature in operational operating mode EN is low enough to avoid any risk of burns or discomfort when the insulating spikes 72 come into contact, via their top, with the scalp of the user.

[0040] The aforementioned mass flow rate is advantageously determined by calculating the difference in mass of the tank 60 for a predetermined duration in operational operating mode EN. In other words, weight and time measurement are advantageously used to determine mass flow. The mass and the difference in mass of the reservoir 60 can be determined easily and accurately with common weighing instruments, by carrying out several measurements, the results of which are for example averaged. In practice, the tank 60 filled with water is weighed. The scale is then tared before removing the reservoir 60 from the scale pan. Then, after the test (device 1 operating in operational operating mode EN for a predetermined duration, for example equal to two minutes), the tank 60 - which now contains less water - is weighed again on the already tared scale. This therefore makes it possible to measure the difference in weight / mass before and after the test as a negative value. Of course, in this case, a scale adapted to differential weighing will be used, making it possible to measure a negative differential value, which is the case with most of the laboratory scales available. The use of differential weighing as described above, if it proves to be particularly simple and practical, is of course not the only possibility for determining the mass flow rate and methods implementing other types may be used. of sensor. Finally, it should be noted that for a liquid such as water, whose density is known and constant, a measurement of the mass reflects a measurement of the volume. Therefore, a measurement of the mass of liquid water moved by a pump in a given time (mass per unit time) is also equivalent to a measurement of the flow rate (volume per unit time) of the pump. In the case where, in operational operating mode EN, the steam flow is pulsed, so that said mass flow varies cyclically, periodically, for example according to a slotted pattern, it will be possible, if necessary, to measure an average value and / or for example exclude from the measurements the periods of time corresponding substantially to an absence of flow.

The invention has made it possible to demonstrate that the simultaneous supply of heat and steam, in particular with the specific values of temperature and mass flow rate retained and set out in the foregoing, makes it possible to reduce way significant the number of surface defects of the hair, on the scales of the latter. The hair, because of this reduction in the number of defects, thus presents a smoother surface, which reflects the light in a more homogeneous way, in the manner of a specular reflection, which makes the hair appear shinier, softer and more flexible. Due to this reduction in defects, the hair also has fewer catching points, that is to say they are less likely to cling to each other and are sensorially softer.

As illustrated in the figures, the brushing pins 7, of which the heating pins 70, the insulating pins 72 and preferably the steam pins 71 form part, are organized in at least a plurality of rows, R1, R1', R1", RT", R2, R2', R2", R2'", R3 substantially parallel to the longitudinal direction X-X'. Said rows R1, R1, RT, R1", RT", R2, R2', R2", R2'", R3 advantageously extend in a substantially rectilinear manner, parallel to the longitudinal direction materialized by the central longitudinal axis X- X'. As illustrated in the figures, said rows comprise at least a first primary row R1 which includes at least a first plurality 70A of said heating pins 70. Preferably, as illustrated in the figures, said first primary row R1 comprises only heating pins 70, that is to say that it is formed exclusively by the first plurality 70A of heating pins 70. It is however perfectly possible, without departing from the scope of the invention, that said first row R1 not only includes the first plurality 70A of said heating pins 70, but also other pins, for example one or more insulating pins 72 and/or one or more steam pins 71, without departing from the scope of the invention. Advantageously, the first primary row R1 extends longitudinally along a first axis X1 -XT parallel to the longitudinal direction X-X'. As illustrated, said plurality of rows also comprises a first secondary row R2 which in this case extends along a second longitudinal axis X2-X2' parallel to the longitudinal direction materialized by the central longitudinal axis X-X'. Said first secondary row R2 includes at least a first plurality 72A of said insulating pins 72. Preferably, as illustrated in the figures, the first secondary row R2 is formed only of insulating pins 72, in which case it only includes said first plurality 72A of insulating pins 72. It is however quite possible, without departing from the scope of the invention, that said first secondary row R2 includes, in addition to said first plurality 72A of insulating pins 72, one or several heating pins 70 and/or one or more steam pins 71. In accordance with the illustrated embodiment, the first primary R1 and secondary R2 rows are substantially adjacent, i.e. no other row of said plurality of rows is interposed between them.

According to the invention, said first primary R1 and secondary R2 rows are also offset longitudinally so that heating pins 70 of said first primary row R1 are not aligned with insulating pins 72 of said first secondary row R2 according to a transverse direction YY' substantially perpendicular to said longitudinal direction X-X'. Said transverse direction YY' advantageously corresponds, and as illustrated in the figures, to the width of the head 3. The front face 3A of the head 3 thus extends along a mean plane which is advantageously parallel to a plane passing through the axis central longitudinal XX' materializing the longitudinal direction, and by the transverse axis YY' materializing said transverse direction. The aforementioned longitudinal shift implies that there are, in the first primary row R1, heating pins 70 which are not located to the right, in a transverse direction parallel to the transverse axis Y-Y', of an insulating pin 72 of the first secondary row R2. In other words, at least some of the heating pins 70 of the first primary row R1 do not form with insulating pins 72 of the first secondary row R2 respective transverse rows parallel to the transverse direction Y-Y'. Due to this transverse misalignment of the heating pins 70 and the insulating pins 72 of said first primary row R1 and first secondary row R2, the orthogonal projection, on a projection plane which passes through the central longitudinal axis XX' and is perpendicular to the 'transversal axis Y-Y', of one or more of the insulating pins 72 of the first secondary row R2, occupies at least part of the free space located between the orthogonal projections of two adjacent heating pins 70 of the first primary row R1 on this same projection plane. Such a longitudinal offset of the first primary row R1 and first secondary row R2 makes it possible to promote the mechanical tensioning of the hair so as to effectively press the hair on and against the heating pins 70. In other words, thanks to this longitudinal offset adjacent rows R1, R2, the hair is stretched by alternating insulating pins 72 and heating pins 70, which allows the hair to be pressed against the heating pins 70, thus increasing the heat exchange surface. Preferably, in order to further increase this tensioning effect, leading to an improvement in heat exchange, the first primary R1 and secondary R2 rows are offset longitudinally so that at least some of the pins 70, 72 of said first primary R1 and secondary R2 rows are staggered, i.e. to say that the orthogonal projection of at least some of the insulating pins 72 on the aforementioned projection plane is located substantially equidistant from the respective orthogonal projections of two adjacent heating pins 70 of the first primary row R1 on this same projection plane. Thus, the insulating spikes 72 advantageously play the role of tensioning spikes, since they preferably contribute, in addition to their thermal insulation function, to imparting a mechanical tension to the hair engaged by the head 3, which makes it possible to flatten them effectively on and against the heating pins 70. The insulating pins 72 thus make it possible, in cooperation with the other brushing pins 7 (including the heating pins 70 and the steam pins 71), to stretch the hair engaged by the head 3 in order to press them laterally on and against the heating pins 70 and/or the steam pins 71, thus allowing a better heat exchange as well as a better supply of steam to the locks of hair concerned.

In order to obtain this tensioning effect (or mechanical tensioning) and effective plating of the hair on the heating pins 70, with a view in particular to increasing the heat exchange surface, it is preferable that, as in the embodiment illustrated in the figures, none of the heating pins 70 of said first primary row R1 is aligned with any one of the insulating pins 72 of said first secondary row R2 in the transverse direction Y-Y'. In other words, in this preferred embodiment, the quotient Q1 of the number N1 of pins of the first primary row R1 which are not aligned in the transverse direction YY' with pins of the first secondary row R2, by the total number N1 T of pins of said first primary row R1 is equal to 100%. However, the quotient Q1 in question may well be less than 100% without departing from the scope of the invention. Thus, the technical effect of tensioning and improvement of the heat exchange surface is significantly perceptible when said quotient Q1 is at least equal to 50% (that is to say that at least the half of the heating pins 70 of the first primary row R1 are not aligned with insulating pins 72 of said first secondary row R2 in a direction parallel to the transverse axis Y-Y'), and preferably is at least equal to 70 %, and even more preferably is at least equal to 80%. Preferably, and as illustrated in the figures, the pins 7 of said rows of said plurality of rows R1, R1', R1", R1'", R2, R2', R2", R2'", R3 are regularly spaced from each other in the longitudinal direction XX' within the same row of said plurality of rows. In other words, within each of said rows in question, the longitudinal distance separating two adjacent pins 7, corresponding to the pitch of the row concerned, is substantially constant. However, it is perfectly possible for all or some of said rows of said plurality of rows to have a pitch which varies within a row, or a pitch which varies from one row to another.

In order to obtain the transverse misalignment of the pins 7 exposed in the above, it is possible to play on different parameters to obtain the longitudinal offset of the first primary R1 and secondary R2 rows. Thus, if the respective pitches of said first primary row R1 and first secondary row R2 are for example constant and substantially identical or close, then the longitudinal offset can be obtained for example by positioning an end pin of said first primary row R1 (c i.e. a pin corresponding to one of the ends of said first primary row R1) and an end pin of said first secondary row R2 (i.e. a pin corresponding to one of the ends of said first secondary row R2) offset in the transverse direction Y-Y'. It is alternatively possible for said end pins of the first primary row R1 and secondary R2 to be aligned in the transverse direction Y-Y', but for the pitch of the first primary row R1 to be different from the pitch of the first secondary row R2, and/or that at least one of said pitches is variable, to generate a transverse misalignment of at least some of the pins of said first primary R1 and secondary R2 rows. It is also possible to randomly space the pins within each of said first primary row R1 and first secondary row R2 to obtain the required transverse misalignment. Consequently, the longitudinal offset of the first primary row R1 and first secondary row R2 referred to in the above must be understood, unless otherwise indicated, in an extensive manner, that is to say that it covers at least the different possibilities of misalignment mentioned above, and is not limited to the embodiment illustrated in the figures according to which the quotient Q1 is equal to 100%. Preferably, this longitudinal offset is implemented for all the rows of said plurality of rows R1, RT, R1", RT", R2, R2', R2", R2'", R3, so that each row of said plurality of rows R1, RT, R1", RT", R2, R2', R2", R2'", R3 is offset longitudinally (in the sense explained above) with respect to each other row of said plurality of rows adjacent to it, so that pins belonging to adjacent rows of said plurality of rows R1, RT, R1", RT", R2, R2', R2", R2'", R3 are not aligned in said direction transverse YY' (in the sense detailed above in relation to the first primary R1 and secondary R2 rows). The implementation of such a generalized transverse offset, as illustrated in the figures, allows an optimal tensioning effect, ensuring a particularly effective heat transfer distributed over the entire front face 3A of the head 3, which leads to remarkable results. in terms of shaping and beautifying the hair. Preferably, in order to obtain the aforementioned technical effects, it is preferable that each of the pins of each of said rows R1, RT, R1", RT", R2, R2', R2", R2'", R3 is offset transversely with the pins of the adjacent rows. In this case, each row Ri of said plurality of rows R1, RT, R1", RT", R2, R2',

R2", R2'", R3 is arranged so that:

Q _Ri = 100% with Qra = Ni / Nh

where Ni designates the number of pins of said row Ri which are not aligned in the transverse direction Y-Y' with pins of another adjacent row of said plurality of rows R1, R1', R1", R1'" , R2, R2', R2", R2'", R3, while Nh designates the total number of pins of said row Ri.

[0050] However, it is perfectly possible for the QRI quotient referred to above to be, for each of said rows or for some of them, less than 100%, without departing from the scope of the invention. For example, quite significant effects in terms of improving heat transfer in particular are obtained when, for each row Ri of said plurality of rows R1, R1', R1", R1'", R2, R2', R2″, R2′″, R3, ÛRi > 50%, preferentially when QRI > 70%, and even more preferentially when QRI > 80%. Advantageously, within each row of said plurality of rows R1, R1, R1", R1'", R2, R2', R2", R2'", R3, the pins 7 are spaced apart according to said longitudinal direction XX' by a longitudinal spacing DL comprised between 1.5 mm and 5 mm, preferably between 2 mm and 4 mm. The aforementioned values advantageously correspond to the maximum longitudinal spacing between two adjacent pins 7 within the same row. Indeed, said longitudinal spacing DL can vary over the height of the spikes 7, depending on the profile of the latter, which can for example be thinner from the bottom upwards in the longitudinal direction X-X'. The implementation of a longitudinal gauge DL included in the aforementioned ranges represents an optimal compromise for:

- on the one hand allow an easy and fluid passage of the hair between the pins 7 of the same row, advantageously limiting the risk of knot formation or painful pulling on the hair, which allows great comfort of use, including including when the hair is straight or wavy;

- and on the other hand to force the lock of hair passing between two adjacent pins to come into contact with the pins, thus promoting heat exchange when the pins in question are heating pins 70.

The aforementioned longitudinal distance DL also makes it possible, when the pins concerned are insulating pins 72, to obtain a good compromise between the desired mechanical tension effect and the fluid passage of the hair between the pins.

Advantageously, each row of said plurality of rows R1, R1', R1", R1'", R2, R2', R2", R2'", R3 delimits with another row of said plurality of rows which is adjacent, an inter-row space whose width DT in the transverse direction YY' is between 1 mm and 8 mm, preferably between 1 mm and 5 mm. The aforementioned values advantageously correspond to the maximum width of the inter-row space, insofar as said width may vary over the height of the spikes 7, depending on the profile of the latter, which may for example go thinner from bottom to top in the transverse direction. Here again, the use of an inter-row space whose width DT, measured in the transverse direction Y-Y', is included in the aforementioned preferential ranges allows an excellent compromise between comfort of use and efficiency in terms of detangling and heat transfer. Preferably, the brush pins 7 are distributed over the front face 3A according to a distribution pattern which has a plane P of central symmetry. Such a symmetrical arrangement facilitates the use of the device 1, the latter thus forming an advantageously ambidextrous device 1, usable both by a user of the right hand or the left hand, but also on the left side or on the left side. right of the user's head while advantageously maintaining an identical relative movement/treatment gesture: typically from the root to the tip of the hair. Such a symmetrical arrangement also contributes to simplifying the industrial manufacture of the hairdressing device 1 .

Advantageously, said heating pins 70 are arranged in a plurality of primary rows R1, R1', R1", R1'" including said first primary row R1, while said insulating pins 72 are arranged in a plurality of secondary rows R2 , R2', R2", R2'" including said first secondary row R2, said primary rows R1, R1', R1", R1'" and secondary rows R2, R2', R2", R2'" being arranged alternately and forming part of said aforementioned plurality of rows.

In this preferred embodiment, which is illustrated in the figures, said plurality of rows is thus formed by alternating primary rows formed exclusively of heating pins 70 and secondary rows formed exclusively of insulating pins 72. Thus, two rows primary heating pins 70 are advantageously separated by a secondary row of insulating pins 72, and reciprocally two secondary rows of insulating pins 72 are advantageously separated by a primary row of heating pins 70. This alternating arrangement of the heating pins 70 and insulating pins 72 , preferably with a longitudinal offset between all the adjacent rows as mentioned previously, makes it possible to optimally flatten the hair engaged by the head 3 on the heating pins 70, thus improving the heat transfer within the hair, which contributes to a embellishment effect, while allowing them to be detangled effectively.

Advantageously, said plurality of rows comprises a mixed row R3 including at least on the one hand a second plurality 72B of said insulating pins 72 and on the other hand said plurality of steam pins 71, said insulating pins 72 and steam pins 71 being arranged alternately within said mixed row R3. That means that in the longitudinal direction materialized by the central axis X-X', each insulating pin 72 of the mixed row R3 is adjacent to at least one steam pin 71 of the mixed row R3, while reciprocally each steam pin 71 of the mixed row R3 is adjacent to at least one insulating pin 72 of the mixed row R3. This configuration makes it possible to confine the jets of steam coming from each steam spike 71, on each side of the latter, and thus to promote optimum diffusion of the steam through the strands of hair engaged by the head 3. In addition, the alternation, within the mixed row R3, of steam pins 71 and insulating pins 72 allows an excellent compromise between the efficiency and the size of the vaporization chamber 50. The use of an alternating pattern makes it possible to implements a limited number of steam pins 71 (number on which the size of the vaporization chamber 50 depends) while maintaining an appropriate pitch between the adjacent pins of the mixed row R3, guaranteeing the efficiency of the transfer of steam and heat .

Advantageously, the mixed row R3 is centered on the head 3. This means that the aforementioned central plane P of symmetry passes through said steam pins 71. This characteristic that the steam pins 71 are arranged substantially in the center of the front face 3A has various advantages. A first advantage lies in the safety of use: an emission of steam located in the center of the front face 3A in fact makes it possible to limit the risk of burns. Another advantage lies in the fact that the water vapor can act more effectively on the hair because it can escape less easily than if it were emitted from the periphery of the head 3.

In the preferred embodiment illustrated in the figures, said plurality of secondary rows R2, R2', R2", R2'" includes, in addition to said first secondary row R2 which extends longitudinally along the second axis X2-X2' , a second secondary row R2', which extends for example along a third axis X3-X3', and which is formed by a third plurality 72C of said insulating pins 72. Said first and second secondary rows R2, R2' are arranged either side of said mixed row R3, preferably adjacent to the latter. Advantageously, said mixed rows R3, first secondary row R2 and second secondary row R2' are offset longitudinally so that the pins of said mixed rows R3, first secondary row R2 and second secondary row R2' are not aligned in the transverse direction Y-Y ', and be by example arranged in staggered rows as shown, in order to press the hair against the steam pins 71 and thus optimize the transfer of heat and steam.

Advantageously, the quotient Q3 of the number N3 of pins of the mixed row R3 which are not aligned in the transverse direction Y-Y' with pins of the first secondary row R2 or of the second secondary row R2', by the number total N3T of pins of said mixed row R3 is at least equal to 50%, and preferably is at least equal to 70%, and even more preferably is at least equal to 80%. Preferably and as illustrated, said quotient Q3 is equal to 100%.

The implementation of the mixed row R3 is moreover preferentially independent of the other technical characteristics exposed here, and in particular of the implementation or not of a longitudinal offset of the rows of heating pins and insulating pins.

Thus constitutes an independent invention as such a hairdressing appliance 1 comprising at least one head 3 for engaging the hair of a user, said head 3 being provided with brushing pins 7 including at least heating pins 70 for transmitting heat to the hair and insulating spikes 72 to keep said heating spikes 70 away from the user's scalp, said brushing spikes 7 being organized in at least a plurality of rows R1, R1', R1”, R1'”, R2, R2', R2”, R2'”, R3 substantially parallel to a longitudinal direction X-X', said hairdressing appliance 1 being characterized in that said head 3 is provided with a plurality of ejection orifices 710 of steam to subject said hair engaged by said head 3 to a flow of steam, said plurality of rows R1, R1', R1”, R1'”, R2, R2', R2”, R2'”, R3 comprising a mixed row R3 including at least on the one hand a second plurality 72B of said insulating pins 72 and on the other hand said plurality of steam pins 71, said insulating pins 72 and steam pins 71 being arranged alternately within said mixed row R3, said mixed row R3 being advantageously centered on head 3.

In the particular embodiment illustrated in the figures, said plurality of primary rows comprises, in addition to said first primary row R1, a second primary row R1′ formed by a second plurality 70B of said heating pins 70. Said second primary row R1' is preferably arranged symmetrically to said first primary row R1 with respect to said plane P of central symmetry and it extends longitudinally along a fourth axis X4-X4'. Said plurality of primary rows also preferably comprises a third primary row R1” formed by a third plurality 70C of said heating pins 70. Said third primary row R1” extends longitudinally along a fifth axis X5-X5′ substantially parallel to said central longitudinal axis X-X'. As illustrated, said fifth axis X5-X5' is farther from said central longitudinal axis XX' than is the first axis X1-X1'. Said plurality of primary rows also comprises a fourth primary row R1 '”, formed by a fourth plurality 70D of said heating pins 70. Said fourth primary row R1 '” is arranged symmetrically to said third primary row R1 ” with respect to said plane P of central symmetry, and extends longitudinally along a sixth axis X6-X6'.

Furthermore, as illustrated in the figures, said plurality of secondary rows also comprises a third secondary row R2" formed by a fourth plurality 72D of said insulating pins 72, and which extends for example along a seventh axis X7-X7' advantageously interposed between said first axis X1 -X1' and fifth axis X5-X5'. Symmetrically, said plurality of secondary rows also comprises a fourth secondary row R2'” formed by a fifth plurality 72E of said insulating pins 72, which extends for example along an eighth axis X8-X8' advantageously interposed between said fourth axis X4-X4 ' and sixth axis X6-X6'. Advantageously, the primary and secondary rows are alternated, and are also preferably offset longitudinally two by two, which allows excellent heat exchange and efficient penetration of the flow of steam within the locks of hair engaged by the head 3.

[0064] Preferably, the hairdressing appliance 1 comprises, on the periphery of the head 3 and on the lateral edges of the latter, disentangling pins 73, which include for example a row (FIGS. 1, 2, 3) or several rows (FIG. 4) of pins combining, for example, insulating pins 72, or any other even finer and more flexible pins (“pinhead” type for example), and tufts of flexible pins. The disentangling pins 73 make it possible to prepare the locks of hair by disentangling them, before they are subjected to the thermo-mechanical treatment of the heating pins 70 and insulating pins 72 in rows alternating which form, between the rows of disentangling pins 73, the main brushing zone. Thus, it is easier to implement the thermo-mechanical treatment and to benefit from the technical effects mentioned above.

[0065] Ultimately, the invention makes it possible, thanks to the specific spatial distribution of pins 70, 71, 72 assuming different functions set out in the foregoing, to obtain quite remarkable results in terms of shaping and embellishment of the hair, as well as in terms of comfort of use and detangling efficiency.

POSSIBILITY OF INDUSTRIAL APPLICATION

The invention finds its industrial application in the design and manufacture of hairdressing appliances, for example for domestic use, intended to provide shaping, embellishment and/or improvement of the health of the hair, and more specifically electric portable hairdressing appliances such as hairdressing brushes, detangling brushes, smoothing brushes or hair straighteners.

Claims

28 CLAIMS

1 . Hairdressing appliance (1) comprising at least one head (3) for engaging the hair of a user, said head (3) being provided with brushing pins (7) including at least heating pins (70) for transmitting heat to the hair and insulating pins (72) to keep said heating pins (70) away from the user's scalp, said brushing pins (7) being organized in at least a plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2”, R2'”, R3) substantially parallel to a longitudinal direction (X-X'), said hairdressing device (1) being characterized in that said rows comprise at at least a first primary row (R1) which includes at least a first plurality (70A) of said heating pins (70), as well as a first secondary row (R2) which includes at least a first plurality (72A) of said insulating pins (72 ), said first primary (R1) and secondary (R2) rows being substantially adjacent and offset longitudinally so that heating pins (70) of said first primary row (R1) are not aligned with insulating pins (72) of said first secondary row (R2) in a transverse direction (Y-Y') substantially perpendicular to said longitudinal direction (X-X'), said head (3) being provided with a plurality of vapor ejection orifices (710) to subject said hair engaged by said head (3) to a flow of steam.

2. Hairdressing appliance (1) according to the preceding claim, characterized in that the quotient (Q1) of the number (N1) of pins of the first primary row (R1) which are not aligned in the transverse direction (Y-Y' ) with pins of the first secondary row (R2), by the total number (N1T) of pins of said first primary row (R1), is at least equal to 50%, and preferably is at least equal to 70%, and even more preferably is at least equal to 80%.

3. Hairdressing appliance (1) according to any one of the preceding claims, characterized in that each of said heating pins (70) has a substantially oblong shape in cross section.

4. Hairdressing appliance (1) according to any one of the preceding claims, characterized in that said heating pins (70) are formed by a single and same first one-piece piece (700), for example aluminum or cast aluminum.

5. Hairdressing appliance (1) according to any one of the preceding claims, characterized in that said insulating pins (72) are formed by a single and same second one-piece piece (701), for example of plastic material.

6. Hairdressing device (1) according to any one of the preceding claims, characterized in that each row of the said plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2”, R2' ”, R3) is offset longitudinally with respect to each other row of said plurality of rows adjacent to it, so that pins belonging to adjacent rows of said plurality of rows (R1 , R1 ', R1 ”, R1 '”, R2, R2', R2”, R2'”, R3) are not aligned in said transverse direction (Y-Y').

7. Hairdressing device (1) according to the preceding claim, characterized in that each row of the said plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2”, R2'”, R3) is arranged so that

Q _Ri > 50% with Qra = Ni / Nh where Ni designates the number of pins (7) of said row which are not aligned in the transverse direction (Y-Y') with pins (7) of another row of said plurality of rows (R1, R1 ', R1 ”, R1 '”, R2, R2', R2”, R2'”, R3), while Niî denotes the total number of pins (7) of said row, each row of said plurality of rows (R1 , R1 ', R1 ”, R1 '”, R2, R2', R2”, R2'”, R3) being preferably arranged so that Q _Ri > 70%, and in such a way more preferential so that Q _Ri > 80%.

8. Hairdressing device (1) according to any one of the preceding claims, characterized in that within each row of the said plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2 ”, R2'”, R3), the spikes (7) are spaced from each other in said longitudinal direction (X-X') by a longitudinal spacing (DL) of between 1.5 mm and 5 mm, preferably between 2mm and 4mm.

9. Hairdressing device (1) according to any one of the preceding claims, characterized in that each row of the said plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2”, R2' ”, R3) delimits with another row of said plurality of rows (R1 , R1 R1 ”, R1 '”, R2, R2', R2”, R2'”, R3) which is adjacent to it, an inter-row space whose width (DT) in the transverse direction (Y-Y') is between 1 mm and 8 mm, preferably between 1 mm and 5 mm.

10. Hairdressing appliance (1) according to any one of the preceding claims, characterized in that said heating pins (70) are arranged in a plurality of primary rows (R1, R1 ', R1 ”, R1 '”) including said first primary row (R1), while said insulating pins (72) are arranged in a plurality of secondary rows (R2, R2', R2”, R2'”) including said first secondary row (R2), said primary rows (R1, R1', R1”, R1'”) and secondaries (R2, R2', R2”, R2'”) being arranged alternately and forming part of said plurality of rows.

11. Hairdressing appliance (1) according to any one of the preceding claims, characterized in that said brushing pins (7) include a plurality of steam pins (71) which each incorporate at least one respective of said orifices (710 ) steam ejection.

12. Hairdressing appliance (1) according to the preceding claim characterized in that said steam pins (71) are integral with said heating pins (70) each steam pin (71) being advantageously formed by a respective one of said pins heaters (70).

13. Hairdressing appliance (1) according to any one of claims 11 to 12 characterized in that each orifice (710) for ejecting steam is formed over at least half, and preferably over at least two thirds, the height of the steam pin (71) which incorporates it.

14. Hairdressing appliance (1) according to any one of claims 11 to 13 characterized in that each steam spike (71) has a shape substantially flattened with two opposite faces, said vapor ejection orifice (710) opening onto said two faces.

15. Hairdressing appliance (1) according to any one of claims 11 to 15 characterized in that said plurality of rows (R1, R1', R1”, R1'”, R2, R2', R2”, R2'” , R3) comprises a mixed row (R3) including at least on the one hand a second plurality (72B) of said insulating pins (72) and on the other hand said plurality of steam pins (71), said insulating pins (72) and steam pins (71) being arranged alternately within said mixed row (R3), said mixed row (R3) being advantageously centered on the head (3).

16. Hairdressing appliance (1) according to claims 10 and 15 characterized in that said plurality of secondary rows (R2, R2', R2”, R2'”) includes a second secondary row (R2'), said first secondary row (R2) and said second secondary row (R2') being arranged on either side of said mixed row (R3), adjacent to the latter.

17. Hairdressing appliance (1) according to the preceding claim, characterized in that said mixed row (R3), first secondary row (R2) and second secondary row (R2') are offset longitudinally so that the pins of said mixed row (R3) , first secondary row (R2) and second secondary row (R2') are not aligned in said transverse direction (Y-Y').

18. Hairdressing appliance (1) according to the preceding claim, characterized in that the quotient (Q3) of the number (N3) of pins of the mixed row (R3) which are not aligned in the transverse direction (Y-Y') with pins of the first secondary row (R2) or of the second secondary row (R2'), by the total number (N3T) of pins of said mixed row (R3), is at least equal to 0.5, and preferably is at least equal to 0.7, and even more preferably is at least equal to 0.8.