EP3370565B1 - Straightener-like hairstyling device with optimized comb - Google Patents

Description

Technical area

The present invention relates to the field of hair styling devices of the straightener type which allow the treatment of locks of hair by pinching the latter between two treatment surfaces, at least one of said surfaces of which is heated.

State of the art

Hairdressing devices of the straightener type conventionally comprise two arms configured to form a clamp, each arm comprising on its internal face a treatment surface. The treatment surfaces on the two arms are arranged opposite each other and allow a lock of hair to be pressed when the arms are pinched. During use, the straightener is moved along the strand of hair, from root to tip. One of the two treatment surfaces, or even both, is provided with heating means so as to heat the lock of hair during its pinching between the two treatment surfaces, which improves the quality of smoothing of the lock of hair.

Hairdressing devices of the straightener type are also known which comprise, in addition to the aforementioned characteristics, a comb arranged longitudinally which allows the lock of hair to be ventilated by distributing it over the entire length of the treatment surfaces, which makes it possible to heat. and suitably pinch all the hair as it passes between the two treatment surfaces, for better hair straightening. By way of example, such a comb is described in the international application WO 2010 081968 A1 or CN 201624260 U or EP 2208433 A1 .

Summary of the invention

The object of the invention is to implement a styling device of the straightener type which makes it possible to optimize the result of straightening the hair. To this end, the hairdressing appliance according to the invention comprises a first and a second arm configured to form a clamp, a first and a second treatment surfaces configured in facing relation respectively on said arms to press a lock of hair. hair between said treatment surfaces during the pinching obtained by bringing the two arms together. At least one of the two treatment surfaces comprises heating means, preferably the two treatment surfaces, for heating the lock of hair and obtaining better smoothness. In addition, the styling device also comprises a first comb configured on the first arm upstream of the first treatment surface to properly distribute the lock between the two treatment surfaces and to create tension on the lock before it passes between said. treatment surfaces. In other words, the first comb is positioned on the first arm so that the hair meets said comb before it meets the treatment surfaces, according to the normal direction of movement (preferably from the hairline towards the tip) of the hairdressing device during a hair straightening operation for example. Remarkably, this first comb comprises teeth spaced apart from one another at a constant pitch of between 0.50 mm and 8.00 mm. Furthermore, said teeth have a pyramidal shape with a rectangular base. The larger side of the rectangular base, which defines the larger face of the tooth, is arranged transversely on the comb. The Applicant has indeed observed after having carried out numerous researches and studies that the choice of a comb with teeth having a pyramidal shape with a rectangular base and a constant pitch of between 0.50 mm and 8.00 mm makes it possible to visually very significantly increase the quality of the smoothing of the lock of hair compared to hairdressing devices of the straightener type with comb of the prior art. By means of the expression “comb with teeth having a pyramidal shape with a rectangular base”, it is meant that several teeth of said comb comprise at least one pyramidal tooth portion, that is to say a tooth portion in shape of a pyramid or trunk of a pyramid, as will be explained later. Preferably, said pyramidal tooth portion of the tooth extends over at least half the height of the tooth and advantageously over three quarters of the height of the tooth.

In a preferred embodiment of the hairdressing appliance according to the invention, the pitch between the teeth is 2.10 mm, which makes it possible to optimize the result of the straightening.

In a preferred embodiment of the hairdressing appliance according to the invention, the pyramidal shape with a rectangular base comprises a large base having a width of between 0.80 mm and 1.20 mm, preferably 1.00 mm, and a length between 1.90 mm and 2.70 mm, preferably 2.30 mm. Further, the rectangular-based pyramid shape includes a small base having a width of 0.20mm to 0.40mm, preferably 0.30mm, and a length of 0.40mm to 0.80mm, preferably 0.60 mm. More precisely, said small base is then parallel to said large base and the pyramidal shape can then be likened to a truncated pyramid, ie a portion of a pyramid, the top of the pyramid being formed by said small base. Furthermore, the height separating the large base and the small base is between 2.00 mm and 16.00 mm, preferably 10.40 mm. These dimensional choices of the rectangular-based pyramidal shape of the teeth also make it possible to optimize the result of straightening the lock of hair.

According to the hairdressing device which is the subject of the invention, the latter comprises support means configured on the second arm upstream of the second treatment surface and of the first comb in order to force the lock of hair to penetrate between the teeth as far as in the bottom of said first comb. The positioning of the hair of the lock in the bottom of the comb allows the teeth to press more strongly on said hair and, thus, to put them under suitable tension before their passage between the two treatment surfaces.

In one embodiment, these support means consist of a curved cover arranged on the second arm in correspondence with the first comb on the first arm, said first comb being housed in said cover during the pinching.

In a first variant, the curved cap comprises a longitudinal edge which bears on the lock of hair. Preferably, the position of this longitudinal edge corresponds substantially to the bottom of the comb in the pinching position.

In a second variant, the curved cover comprises a longitudinal part configured to form a second comb arranged in the opposite direction to the first comb, downstream from said first comb.

In another embodiment, these support means comprise a longitudinal contact element in a material configured to exert friction resistance on the lock of hair, for example a silicone material. In the case of a curved cover, it is possible to envisage producing the longitudinal edge in a silicone material or even in other materials.

In a variant of the hairdressing appliance according to the invention, the latter also comprises vaporization means configured to carry out a steam treatment in addition to a heating treatment during the passage of the lock of hair between the two surfaces of the hair. treatment, or even before or after its passage between said treatment surfaces.

Brief description of the figures

• la figure 1 illustre une vue tridimensionnelle de l'appareil de coiffure ;
• les figures 2 et 3 illustrent deux vues tridimensionnelles des deux bras constituant l'appareil de coiffure de la figure 1 ;
• la figure 4 illustre une vue tridimensionnelle du peigne mis en œuvre sur l'appareil de coiffure ;
• la figure 5 illustre une vue agrandie de dessus d'une des dents du peigne ;
• la figure 6 illustre une vue de côté agrandie de trois dents du peigne ;
• la figure 7 illustre une variante de mise en œuvre d'un capot sur l'un des bras de l'appareil de coiffure de la figure 1.

The characteristics and advantages of the invention will become apparent on reading the following description of an embodiment of the hairdressing appliance, which is based on figures, among which:

• the figure 1 illustrates a three-dimensional view of the styling apparatus;
• the figures 2 and 3 illustrate two three-dimensional views of the two arms constituting the styling apparatus of the figure 1 ;
• the figure 4 illustrates a three-dimensional view of the comb used on the hairdressing device;
• the figure 5 illustrates an enlarged top view of one of the teeth of the comb;
• the figure 6 illustrates an enlarged side view of three teeth of the comb;
• the figure 7 illustrates an alternative embodiment of a cover on one of the arms of the styling appliance of the figure 1 .

detailed description

In the remainder of the description, the same references are used to describe the similar characteristics according to the different variant embodiments.

In the remainder of the description, the term “straightener” will be used to denote the hairdressing appliance 1 according to the invention.

As illustrated in figure 1 , the straightener 1 comprises two arms 2, 3 - also called jaws - articulated together by means of a pivot connection 4, which makes it possible to constitute a clamp which can be placed either in the open position where the two arms are separated one by one. on the other, or in the closed position where the two arms are brought together. The proximal parts 2a, 3a of the two arms 2, 3 can simultaneously be gripped with one hand, which allows the closure of the clamp and the manipulation of the straightener 1. The two arms 2, 3 each comprise on their internal face 5, 6 and at their distal part 2b, 3b, a treatment surface 7, 8. The two treatment surfaces 7, 8 are arranged opposite each other and make it possible to press a lock of hair arranged between said treatment surfaces 7 , 8, when closing the clamp.

Preferably, the two treatment surfaces 7, 8 are heating, but it is possible to provide alternative embodiments with only one of the two treatment surfaces 7, 8 which is heating. The treatment surfaces 7, 8 are in the form of heating plates 9, 10 and incorporate heating means (not illustrated) of said heating plates 9, 10 comprising in particular a heating device (not illustrated) consisting of a thermistor to positive temperature coefficient, known as PTC, and a temperature measurement (not shown) consisting of a thermistor with a negative temperature coefficient, called CTN.

The foregoing characteristics are well known to those skilled in the art of the straighteners field, and are therefore not described in more detail. However, innovative variants can be envisaged on these aforementioned characteristics of the straightener, without departing from the scope of the present invention.

As shown on figures 1 and 3 , the straightener 1 comprises a comb 11 which extends longitudinally adjoining the upstream longitudinal edge 9a of the heating plate 9 of the first treatment surface 7. The comb 11 comprises a longitudinal body 12 and teeth 13, for example between forty and fifty teeth 13, as shown in figure 4 . This comb 11 is preferably assembled in a removable manner on the internal face 5 of the arm 2. For this, the internal face 5 of the arm 2 comprises a groove 14 which extends longitudinally adjoining the upstream longitudinal edge 9a of the heating plate 9. , this groove 14 being of a shape complementary to that of the body 12 of the comb 11, which allows the body 12 to be slidably mounted inside said groove 14, with the teeth 13 of the comb 11 directed towards the second arm 3. This advantageously makes it possible to replace the comb 11, for example by another having different dimensions of teeth 13.

As illustrated next to figures 4 to 6 , the teeth 13 of the comb 11 are spaced apart from each other at a regular pitch p and they have a pyramidal shape with a rectangular base. The large face 15 of the tooth 13 is disposed in the transverse direction on the comb 11 and the small face 16 of the tooth 13 is disposed in the longitudinal direction of the comb 11. Each tooth 13 has a large rectangular base 17 proximal to -vis of the body 12, and a small rectangular base 18 distal with respect to said body 12 and constituting the tip of tooth 13. More precisely, said small rectangular base 18 is then parallel to said large rectangular base 17 and the shape pyramid can then be likened to a trunk of a pyramid, that is to say a portion of a pyramid, the top of the pyramid being formed by said small base. The height h of tooth 13 is defined by the distance separating the small rectangular base 18 from the large rectangular base 17. The large rectangular base 17 has a length L1 and a width l1 and, likewise, the small rectangular base 18 has a length L2 and a width l2.

The Applicant has observed that this choice of teeth 13 having a pyramidal shape with a rectangular base, arranged as illustrated in the figures 4 and 6 , with a regular pitch p chosen between 0.50 mm and 8.00 mm makes it possible to remarkably improve the penetration of the lock of hair between the teeth 13 by distributing the hair of said lock evenly over the length of the comb 11, and makes it possible to create a homogeneous tension on all the hairs of said lock before their passage between the treatment surfaces 7, 8. The homogeneous tension on the hair and their homogeneous distribution contribute to suitably heating all the hairs of the lock to the core and to ensure homogeneous pressure on all of said hairs as they pass between the two treatment surfaces 7, 8. The Applicant has noted that these choices make it possible to visually increase the quality of straightening of the hair in comparison with previous straighteners.

• une grande base rectangulaire 17 de largeur l1 comprise entre 0,80 mm et 1,20 mm, de préférence égale à 1,00 mm, et de longueur L1 comprise entre 1,90 mm et 2,70 mm, de préférence égale à 2,30 mm,
• une petite base rectangulaire 18 de largeur l2 comprise entre 0,20 mm et 0,40 mm, de préférence égale à 0,30 mm, et une longueur L2 comprise entre 0,40 mm et 0,80 mm, de préférence égale à 0,60mm, et
• une hauteur h comprise entre 2,00 mm et 16,00 mm, de préférence égale à 10,40 mm.

The results of hair straightening are optimized by choosing a pitch p of 2.10 mm between teeth 13. These smoothing results are further optimized by choosing for the dimensions of teeth 13:

• a large rectangular base 17 of width l1 between 0.80 mm and 1.20 mm, preferably equal to 1.00 mm, and of length L1 between 1.90 mm and 2.70 mm, preferably equal to 2 , 30 mm,
• a small rectangular base 18 of width l2 between 0.20 mm and 0.40 mm, preferably equal to 0.30 mm, and a length L2 between 0.40 mm and 0.80 mm, preferably equal to 0 , 60mm, and
• a height h between 2.00 mm and 16.00 mm, preferably equal to 10.40 mm.

As shown on figures 1 and 2 , the smoother 1 comprises support means constituted by a cover 19 which is arranged on the second arm 3 upstream of the second treatment surface 8. This cover 19 has a curved shape with a longitudinal part 24 which descends and comes to rest. position upstream of the teeth 13 of the comb 11, next to said teeth 13 which are located housed in the cavity 20 formed by the curved cover 19, in the closed position of the clamp. In this closed position of the clamp, shown in figure 1 , the longitudinal edge 21 of the cover 19 is in a position which corresponds substantially to that of the bottom 22 of the comb 11 appearing in more detail on the figures 4 and 6 . This makes it possible to press on the hair of the lock and to force them to slide towards the bottom 22 of the comb 11, between the teeth 13, so as to optimize the tension exerted on said hair during their passage through the comb 11, before to be pressed between the two treatment surfaces 7, 8.

It is possible to envisage variants of support means replacing the cover 19, for example by providing on the second arm 3 a wire element or a bar (not shown) which would have an arrangement similar to the position of the longitudinal edge 21. cover 19.

Variants of cover 19 are also possible. As illustrated in figure 7 , it is possible to provide on the cover 19, at its longitudinal edge 21, a bead 23 (or a blade) made of a material having a coefficient of friction which ensures a slight additional tension on the hair on which said bead 23 presses when closing the clamp. This bead 23 is preferably made of silicone. This silicone material could also be considered for the wire element or the aforementioned bar.

In another variant, it is possible to envisage the implementation of a second comb (not illustrated) arranged on the longitudinal part 24 of the cover 19, illustrated in particular in figures 2 and 7 , in opposition to the first comb 11 on the first arm 2. This second comb would make it possible to ensure a pre-tension on the hair and a pre-separation of the hair before it passes through the first comb 11. The teeth of this second comb could be identical or similar to the teeth 13 of the first comb 11, or even of a different design. This second comb could also be provided in a silicone material to increase the coefficient of friction on the hair.

It is also conceivable that the teeth 13 of the first comb 11 are made of a material whose coefficient of friction makes it possible to ensure a slight additional tension on the hair during their passage between said teeth 13. These teeth 13 may for example be made of silicone.

In another variant of the straightener 1, the latter additionally comprises vaporization means which can be arranged in different ways on one and / or the other of the two arms 2, 3 so as to project steam onto the lock of hair before, during or even after its passage between the two treatment surfaces 7, 8. Such means of vaporization on the straighteners are known to those skilled in the art and are therefore not described in more detail, which does not mean however does not exclude the implementation of innovative vaporization means while remaining within the scope of the present invention.

The foregoing description is in no way limiting, many variants of straighteners being possible without departing from the scope of the invention.

Claims (11)

1. Hairstyling device (1) including a first (2) and a second (3) arm configured to form a clamp, a first (7) and a second (8) treatment surface that face one another, on said arms respectively, for pressing a lock of hair during clamping, and a first comb (11) configured on the first arm upstream of the first treatment surface in order to suitably distribute the lock between the two treatment surfaces and to place tension on the lock before the passage thereof between said treatment surfaces, at least one of the two treatment surfaces including heating means, characterised in that the first comb includes teeth (13) that are mutually spaced apart by a constant spacing (p) of between 0.50mm and 8.00mm, said teeth including at least one tooth portion in the shape of a rectangular-based pyramid or rectangular-based frustum of pyramid.
2. Device (1) according to claim 1, wherein the spacing (p) is 2.10mm.
3. Device (1) according to one of claims 1 or 2, wherein the rectangular-based frustum of pyramid shape includes a large base (17) having a width (l1) comprised between 0.80mm and 1.20mm and a length (LI) comprised between 1.90mm and 2.70mm, a small base (18) having a width (12) comprised between 0.20mm and 0.40mm and a length (L2) comprised between 0.40mm and 0.80mm, and a height (h) separating the large base and the small base comprised between 2.00mm and 16.00mm, the small base being parallel to said large base.
4. Device (1) according to claim 3, wherein the large base (17) has a width (l1) of 1.00mm and a length (LI) of 2.30mm, the small base (18) has a width (12) of 0.30mm and a length (L2) of 0.60mm, the height (h) being 10.40mm.
5. Device (1) according to one of claims 1 to 4, which comprises bearing means (21, 23) configured on the second arm (3) upstream of the second treatment surface (8) and of the first comb (11) to constrain the lock of hair to be penetrated between the teeth (13) until in the bottom (22) of said first comb.
6. Device (1) according to claim 5, wherein the bearing means are constituted of a curved cap (19) wherein is housed the first comb (11) during clamping.
7. Device according to claim 6, wherein the curved cap (19) comprises a longitudinal edge (21) of which the position corresponds substantially to the bottom (22) of the comb (11) in the clamping position.
8. Device (1) according to claim 6, wherein the curved cap (19) comprises a longitudinal portion (24) configured to form a second comb arranged in the reverse direction of the first comb (11).
9. Device (1) according to one of claims 5 to 7, wherein the bearing means comprise a longitudinal contact element (23) in a material configured to exert a resistance to friction on the lock of hair.
10. Device (1) according to one of claims 1 to 9, wherein the two treatment surfaces (7, 8) comprise heating means.
11. Device (1) according to one of claims 1 to 10, which comprises vaporisation means.

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