EP2620074B1 - Hair styling device - Google Patents

Description

The present invention relates to a hair styling device, in particular a hair straightener with a housing and with two arms connected to one another via a joint.

Conventional hair styling devices, in particular hair straighteners, have two opposite heating parts, in particular heating plates, through which the hairs to be treated are pulled during use and at which these hairs are heated. Such heating plates usually have a flat or smooth heating surface.

If, due to, for example, strongly twisted curls in the smoothing process, the tensile force does not spread evenly over the entire width of the hair to be treated, there is the risk with smooth heating surfaces that the hair to be treated will not be uniformly smoothed over the entire width. For example, with twisted and / or twisted hair, it happens increasingly that individual parts of the hair experience no or too low a tensile force, so that these hairs are not adversely brought into the desired smooth shape. Insufficient smoothing is the result. In contrast, other parts of the hair can experience too high a tensile force, which can disadvantageously have a pulling or even tearing of these hair lots result.

Next are from the documents US 853 349 A and EP 1 516 554 A1 Hair straighteners are known, which have to improve the smoothing of the hair heating surfaces with elevations.

Object of the present invention is to provide an improved hair styling device, which is characterized during the smoothing process by a uniform tensile force on the individual hair of the hair strand to be treated.

This object is achieved by a hair styling device with the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

According to the invention, a hair styling device, in particular a hair straightener, is provided with a housing and with two arms connected to one another via a joint. In a hair treatment area of the hair styling device, at least one of the arms has a first heating part with a first heating surface for heating and shaping hair. The first heating surface and / or the housing have, in the hair treatment region of one of the arms, a plurality of first elevations and depressions, which are of alternating design and each extend along a pulling direction of the hair to be treated, preferably perpendicular to a longitudinal orientation of the arms.

The heating surface or the housing of the one arm is thus not planar or smooth, but have the first elevations, which are aligned in the direction of movement or in the pulling direction of the hair to be treated. The heating surface or the housing have due to the first surveys thus at least partially a corrugated shape. The function of the corrugated heating surface or the corrugated housing resembles that of a comb, with which it is possible to separate individual hair and distribute evenly between the individual surveys.

This special configuration of the geometry of the heating surface or of the housing advantageously ensures that the individual hairs of the hair strand to be smoothed are distributed uniformly over the heating surface of the hair straightener. As a result, the individual hairs of the hair strand to be smoothed advantageously experience an almost equal tensile force, as a result of which they are uniformly smoothed.

The first elevations additionally advantageously increase the surface area of the effective working area, that is to say the area of the device in which the hairs are formed. As a result, a larger number of hair can be combined into a tress and formed at the same time.

Preferably, the first elevations are aligned perpendicularly or transversely to a longitudinal alignment of the arms. "Vertical" For the purposes of the application means in particular that the first elevations to the longitudinal alignment of the arms are at an angle of about 90 °, in which case small and manufacturing-related deviations may occur to the 90 ° angle. Low and production-related deviations from the 90 ° angle is to be understood in particular that the first elevations for longitudinal alignment of the arms are at an angle in the range between preferably 80 ° and 100 °, more preferably between 85 ° and 95 °.

The hair treatment area is in particular the area of the hair straightener which is intended to heat and shape the hair. Preferably, the hair treatment area is the area where the hair to be formed during the hair treatment with the hair device in direct contact.

The arms of the hair straightener are preferably mechanically interconnected by means of the joint. The arms of the hair straightener are preferably movable relative to one another via the joint, so that the arms have an open state and a closed state. The heating element is arranged between the arms. In the open state, the hair to be formed between the arms at the opposite end of the joint arms are inserted. For shaping, the arms are then closed, so that the hair on the heating part, in particular on the heating surface, formed when pulling through the hair, preferably smoothed.

Preferably, the hair styling device, in particular the arms, has the longitudinal orientation into which the arms extend. Particularly preferably, the arms are rod-shaped. The arms are in the closed state preferably parallel to each other.

Preferably, the elevations are formed substantially identical to one another. In this case, "essentially identically formed" means that the individual elevations hardly or not differ in their shape and size. Particularly preferably, the recesses are formed substantially identical to each other. The elevations are preferably each executed in the form of a shaft. The depressions are each preferably formed in the form of a negative wave. The elevations and depressions particularly preferably have rounded shapes, in particular no corners and edges.

Alternatively, the individual surveys may differ in their shape and size. According to the elevations, which are located near the edge of the hair treatment area, formed in their height larger than elevations in central area of the hair treatment area. This can counteract the risk of slipping out of the hair to be treated from the hair treatment area during use.

Preferably, edges of the heating surface, over which the hair intended for the treatment is drawn during the hair treatment, have rounded shapes. This can reduce the risk of damage or breakage of the hair.

When using the hair straightener can be distributed evenly between the surveys, ie in the wells through the corrugated heating surface and / or through the corrugated housing the hair to be treated. As a result, these distributed hairs experience an approximately equal tensile force, which can be achieved with advantage over the entire hair strands width a uniform and uniform smoothing result.

In a further preferred development of the invention, the first heating part has a wavy first heating surface through the first elevations and depressions in cross section along the longitudinal alignment of the arms. The design of the shaft, in particular the size and the radius of the circle inscribed circle, is adapted to the particular desired requirement.

In a further preferred development of the invention, the first heating surface has at least one further elevation, which is aligned transversely to the pulling direction of the hair to be treated, in particular preferably along the longitudinal alignment of the arms. The further survey is thus aligned transversely to the pulling direction of the hair to be formed and in particular transversely to the first elevations. Preferably, the further elevation is arranged centrally of the heating surface. The further elevation is preferably formed in its size and shape essentially identically to the first elevations. By this further survey, the coefficient of friction can be increased with advantage, which advantageously has an increased tensile force on the hair to be formed during use of the device with closed arms result.

In a further preferred embodiment of the invention, in the hair treatment area of the hair styling device, the other of the arms has a second heating part with a second heating surface for heating and shaping hair, the second heating surface having at least one second protrusion aligned along the pulling direction of the hair to be treated, more preferably perpendicular to the longitudinal orientation of the arms. The second survey thus extends as well as the first survey in the pulling direction of the hair to be formed. Preferably, the second survey is designed in size, shape and design identical to the size, shape and design of the first survey.

In a further preferred development of the invention, the second heating surface has a plurality of second elevations and depressions, which are of alternating design and each extend along the pulling direction of the hair to be treated, in particular preferably perpendicular to the longitudinal orientation of the arms. As a result, the second heating part also has a wavy second heating surface through the second elevations and depressions in cross-section along the longitudinal alignment of the arms. Particularly preferably, the second elevations and depressions of the second heating surface are each formed as a complementary counterpart to the first elevations and depressions of the first heating surface.

Due to the complementary design of the first heating surface to the second heating surface engage with closed arms, the first elevations in the second recesses and the second elevations in the first wells. As a result, the effect of uniform distribution of the hair to be formed over the entire heating surfaces as well as the consequent uniform pulling force and uniform smoothing can be improved with advantage. In addition, as the surface of the effective heating of the heating parts can be increased, which can be summarized and smoothed in one pass more hair to a strand of hair in one pass.

In a further preferred embodiment of the invention, the hair styling device is used for straightening the hair. The hair styling device is thus preferably a hair straightener.

Figur 1A

einen schematischen Querschnitt eines Ausführungsbeispiels eines Heizteils eines erfindungsgemäßen Haarformgeräts,

Figuren 1B bis 1D

jeweils eine schematische Aufsicht auf ein Ausführungsbeispiel eines Heizteils eines erfindungsgemäßen Haarformgeräts,

Figur 2

einen schematischen Querschnitt eines Ausführungsbeispiels eines erfindungsgemäßen Haarformgeräts,

Figur 3A

eine schematische Aufsicht auf ein Ausführungsbeispiel eines Heizteils eines herkömmlichen Haarformgeräts,

Figur 3B

einen schematischen Querschnitt eines Ausführungsbeispiels des herkömmlichen Heizteils gemäß Figur 3A, und

Figur 3C

eine schematische Ansicht eines Ausführungsbeispiels einer geglätteten Haarsträhne mit einem herkömmlichen Heizteil gemäß den Figuren 3A, 3B im Vergleich zu einer geglätteten Haarsträhne mit einem Heizteil eines erfindungsgemäßen Haarformgeräts gemäß den Figuren 1, 2.

Further advantages, advantageous embodiments and further developments of the hair styling device will become apparent from the following in connection with the FIGS. 1 to 3 described embodiments. Show it:

Figure 1A

a schematic cross section of an embodiment of a heating part of a hair styling device according to the invention,

FIGS. 1B to 1D

each a schematic plan view of an embodiment of a heating part of a hair styling device according to the invention,

FIG. 2

a schematic cross section of an embodiment of a hair styling device according to the invention,

FIG. 3A

a schematic plan view of an embodiment of a heating part of a conventional hair styling device,

FIG. 3B

a schematic cross section of an embodiment of the conventional heating according to FIG. 3A , and

FIG. 3C

a schematic view of an embodiment of a smoothed strand of hair with a conventional heating part according to the FIGS. 3A, 3B compared to a smoothed strand of hair with a heating part of a hair styling device according to the invention according to the FIGS. 1 . 2 ,

In the exemplary embodiments and figures, identical or identically acting components may each be provided with the same reference numerals. The illustrated components and their proportions to each other are basically not to be considered as true to scale. Rather, individual elements such as layers, parts, elements, components and areas for exaggerated representability and / or for better understanding can be shown exaggerated thick or large dimensions.

In the FIGS. 3A and 3B are views of a conventional heating part 5a shown, as used for example in a conventional hair straightener. FIG. 3a shows a plan view of the heating part 5A. FIG. 3B shows a cross section through the heating part 5a of FIG. 3A ,

The conventional heating part 5a has a smooth and planar heating surface 51a. The heating surface 51a of the heating part 5a is the surface at which the hairs to be formed are heated and shaped directly during the application of the hair straightener. In particular, the heating surface 51a is the surface of the heating part 5a through which the hairs are pulled during the treatment.

With such heating parts, as for example in the FIGS. 3A and 3B are shown, it often happens in twisted and / or twisted curls and waves of hair that individual parts of the strand of hair to be formed experience no or too low a tensile force and other parts too high a tensile force. The effect of too low a tensile force on the hair parts can disadvantageously cause that these hairs are not brought into the desired shape, in particular not be smoothed. The occurrence of too high a tensile force can disadvantageously lead to a Ziepen or even loss of these hair parts, so to a departure of these hairs.

Due to the uneven distribution of the tensile force over the entire width of the strand of hair to be formed, a nonuniform smoothing result of this strand of hair results disadvantageously. In particular, the individual hairs of the hair strand are not uniformly gripped between the heating parts, whereby the uneven Smättergebnis comes about.

The smoothing result, as with a conventional heating element according to the FIGS. 3A and 3B can be achieved, for example, in the left figure of FIG. 3C shown. At the two edges of the hair strand the hair is not brought into the desired straight shape due to the lack of or too little pulling force, which results in insufficient smoothing. Only the middle hair section of the hair strand shows a satisfactory smoothing result after the smoothing process.

An optimal, evenly smoothed strand of hair with an ideal smoothing result, which is uniformly distributed over the entire strands width, is in the right figure of the FIG. 3C shown. By means of a wave-like modification of the heating surface according to the invention, this uniform smoothing result is made possible based on a uniformly acting tensile force on the hair. The heating part of the Hair straightener according to the invention is in conjunction with the FIGS. 1 and 2 explained in more detail.

Figure 1A shows a cross section of a heating part 5a, as used for example in a hair straightener according to the invention. The heating part 5a has a heating surface 51a, on which the hairs to be formed are heated and treated. On the side opposite the heating surface 51a, the heating part 5a is attached to the rest of the hair straightener, for example on the body of the hair straightener (not shown). The hairs are guided over the heating surface 51a of the heating element 5a for shaping.

The heating surface 51a has, in contrast to the conventional heating surface (see FIG. 3B ) a plurality of projections 6a and depressions 6b, which are formed alternately and each extending substantially perpendicular to the longitudinal direction of the hair straightener. The elevations 6a and depressions 6b accordingly extend along the pulling direction of the hair to be formed, ie into the plane of the drawing. As a result of the alternating elevations 6a and depressions 6b arranged next to one another, the heating surface 51a has a wave-shaped surface in cross section along the longitudinal direction of the hair straightener.

The shape of the waves of the heating surface 51a is defined by the height h and the length I of the individual wave crest and the radius r of the circle inscribed in the wave crest. The ratios of these variables h, I and r to each other can be matched to intended requirements and applications.

Preferably, the individual elevations 6a of the heating surface 51a are identical in their size and shape or shape to each other. Preferably, the individual recesses 6b of the heating surface 51a are identical in size and shape to each other. Particularly preferably, the size and shape of the depressions 6b are formed as a type of negative to the size and shape of the elevations 6a. In this case, the elevations 6a, which are located near the edge of the hair treatment area, formed in their height larger than elevations 6a in the central region of the hair treatment area (not shown).

The wavy shape of the heating surface 51a can advantageously ensure that the individual hairs of the hair tress to be smoothed are evenly distributed over the heating surface 51a of the heating element 5a. As a result, all the hairs of the hair strand to be smoothed experience an approximately equal tensile force, which produces a uniform and uniform smoothing result of the hair strand. In particular, the function of the wave-shaped heating surface 51a is similar to the function of a comb, with which it is possible to separate individual hairs and distribute them evenly between the individual prongs or prongs of the comb.

In addition, the surface of the effective working area can be increased by the wave-shaped heating surface 51a. The effective working area is the area of the heating part where the hair to be smoothed is effectively shaped. Due to the increase in surface area of the effective working area, the user can advantageously combine a larger number of individual hairs into a strand of hair and smooth them in one pass.

In FIG. 1B is a plan view of the heating part 5a and on the heating surface 51a of the heating part 5a of the embodiment according to the Figure 1A shown. The individual elevations 6a and depressions 6b preferably extend along the pulling direction of the hair to be smoothed over the entire heating surface. The depressions 6b and elevations 6a preferably alternate side by side, wherein the distance between the individual adjacent elevations 6a or depressions 6b is preferably constant over the heating surface 51a.

In order to ensure that the hair to be smoothed experience a sufficiently high tensile force, a further elevation 6c may be formed perpendicular to the elevations 6a or depressions 6b and thus parallel to the longitudinal orientation of the heating part 5a of the hair straightener, as is the case for example in the exemplary embodiment of FIG Figure 1C is shown. Figure 1C again shows a plan view of a heating part 5a and on a heating surface 51a, wherein the heating surface 51a compared to the heating surface of the embodiment of FIG. 1B the further elevation 6c, which is arranged centrally of the heating surface 51a. The further elevation 6c is preferably identical in height and shape to the other elevations 6a of the heating surface 5a. The further survey 6c differs from the other surveys 6a only in their Orientation or extension direction and in their dimensioning in this orientation or extension direction.

Due to the further elevation 6c, the coefficient of friction can advantageously be increased, which, assuming a constant closing force which the user defines, is reflected in an increased tensile force on the hair to be formed. The increased tensile force acts evenly on the hair to be formed, so that it does not oppose the uniform smoothing result.

The embodiment of FIG. 1D differs from the embodiment of FIG. 1B in that the elevations 6a and depressions 6b are not formed on the heating surface 51a of the heating part 5a, but are integrated in the housing 1 in the treatment area of one of the arms or both arms of the hair straightener. The heating surface 51 a is formed as a flat surface having no waveform.

The housing 1 adjacent to the heating surface 51a, over which the hair to be formed is pulled during the hair treatment, has the elevations 6a and depressions 6b. The fact that the housing 1, which is in direct contact with the hair to be formed during the hair treatment, has the elevations and depressions, the comb-like function of the uniform distribution of the hair, the same tensile force on the hair and the uniform smoothing result completely be taken over the housing 1. The heating surface 51a therefore does not necessarily have to have the undulating surface.

In FIG. 2 a hair straightener is shown which comprises two arms 3a, 3b, which are connected to each other by means of a joint 2. About the joint 2, the arms are pliers like open or closed. The hair straightener, in particular the arms 3a, 3b, have a housing 1 or are partially formed from the housing 1. The arms 3a, 3b have a longitudinal orientation L, in which the arms 3a, 3b hineinerstrecken. The longitudinal orientation L is in FIG. 2 in the sheet plane.

The hair straightener has a grip area and a hair treatment area 4, which are arranged side by side in longitudinal alignment. The grip area is in particular the part of the device that was enclosed with the user's hand during the application, so gripped, will. The hair treatment area 4 is the part of the device intended to hold and shape the hair to be treated, that is to say it is in direct contact with the hair to be formed during the hair treatment.

The arms 3a, 3b of the hair straightener each have a heating part 5a, 5b. In particular, the heating parts 5a, 5b are respectively disposed on opposite inner surfaces of the arms 3a, 3b, so that when closing the arms 3a, 3b, the hair to be formed between the heating parts 5a, 5b are inserted. The heating parts 5a, 5b each have a heating surface 51a, 51b. The heating surfaces 51a, 51b are in particular the surfaces of the heating parts 5a, 5b, to which the hairs are heated and shaped by means of a direct contact. The hairs to be formed are therefore drawn during the hair treatment on the heating surfaces 51 a, 51 b.

The heating surfaces 51a, 51b of the heating parts 5a, 5b each have a wave-like shape. This wave-like shape is formed in each case by alternating elevations 6a, 6d and depressions 6b, 6e. For example, the heating surfaces 51a, 51b according to one of the embodiments of FIGS. 1B or 1C educated. Preferably, the elevations 6a and depressions 6b of one of the heating parts 5a are formed as a complementary counterpart to the elevations 6d and depressions 6e of the other of the heating parts 5b. The heating surface 51a of one of the arms 3a thus forms a kind of negative of the heating surface 51b of the other of the arms 3b. Thus, when the arms 3a, 3b are closed during the hair treatment, it is possible to ensure that the elevations 6a of one of the arms 3a into the depressions 6e of the other of the arms 3b and the elevations 6d of the other of the arms 3b into the depressions 6b of the one Engage arms 3a. Thereby, the comb-like function of the heating parts 5a, 5b can be further improved.

The explanation of the hair styling device according to the invention with reference to the embodiments described above is not to be regarded as limiting the invention to these. Rather, the invention encompasses any novel feature as well as any combination of features, which in particular includes any combination of features in the patent claims, even if this feature or combination itself is not explicitly stated in the patent claims or the exemplary embodiments.

LIST OF REFERENCE NUMBERS

1

casing

2

joint

3a

first arm

3b

second arm

4

Hair treatment area

5a

first heating part

5b

second heating part

51a

first heating surface

51b

second heating surface

6a

first survey

6b

first recess

6c

further survey

6d

second survey

6e

second recess

7

hair to be formed

L

Longitudinal alignment of the arms

r

Radius of the circle inscribed in the wave crest

l

Length of the first survey

H

Height of the first survey

Claims (9)

1. Hair-shaping appliance, in particular hair straightener, with a housing (1) and with two arms (3a, 3b) connected together via a joint (2), wherein in a treatment region (4) of the hair-shaping appliance at least one of the arms (3a, 3b) has a first heating part (5a) with a first heating surface (51 a) for heating and shaping hair, wherein the first heating surface (51a) and/or the housing (1) have in the treatment region (4) of one of the arms (3a) a plurality of first elevations (6a) and depressions (6b) which are formed alternately and which each extend along a direction of pull of the hair to be treated, characterised in that
   the elevations which are located close to an edge of the hair treatment region are designed to be greater in height than elevations in a central region of the hair treatment region.
2. Hair-shaping appliance according to claim 1, wherein
   the elevations (6a) are aligned perpendicular to a longitudinal orientation (L) of the arms (3a, 3b).
3. Hair-shaping appliance according to one of the preceding claims, wherein
   thanks to the first elevations (6a) and depressions (6b) in cross-section perpendicular to the longitudinal orientation (L) of the arms (3a, 3b) the first heating part (5a) has an undulating first heating surface (51a).
4. Hair-shaping appliance according to one of the preceding claims, wherein
   the first heating surface (51a) has at least one further elevation (6c) which is aligned transversely to the direction of pull of the hair to be treated.
5. Hair-shaping appliance according to one of the preceding claims, wherein
   in the treatment region (4) of the hair-shaping appliance the other of the arms (3a, 3b) has a second heating part (5b) with a second heating surface (51 b) for heating and shaping hair, and the second heating surface (51 b) has at least one second elevation (6d) which is aligned along the direction of pull of the hair to be treated.
6. Hair-shaping appliance according to claim 5, wherein
   the second heating surface (51 b) has a plurality of second elevations (6d) and depressions (6e) which are formed alternately and which each extend along the direction of pull of the hair to be treated.
7. Hair-shaping appliance according to claim 6, wherein
   thanks to the second elevations (6d) and depressions (6e) in cross-section perpendicular to the longitudinal orientation (L) of the arms (3a, 3b) the second heating part (5d) has an undulating second heating surface (51 b).
8. Hair-shaping appliance according to one of the preceding claims 6 or 7, wherein the second elevations (6d) and depressions (6e) of the second heating surface (51 b) are each designed as a complementary counterpart to the first elevations (6a) and depressions (6b) of the first heating surface (51 a).
9. Hair-shaping appliance according to one of the preceding claims, which is a hair straightener.

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