EP1853131A1

EP1853131A1 - Hair styling device

Info

Publication number: EP1853131A1
Application number: EP06723156A
Authority: EP
Inventors: Friedrich Henninger; Jürgen SENG; Dieter Liebenthal
Original assignee: Braun GmbH
Current assignee: Braun GmbH
Priority date: 2005-03-04
Filing date: 2006-03-01
Publication date: 2007-11-14
Anticipated expiration: 2026-03-01
Also published as: CN101132714A; CN102845996A; EP1853131B1; DE102005010568A1; WO2006092282A1; US20080196739A1; US8066016B2

Abstract

The invention relates to a hair styling device comprising a handle part (1), a part (2) for heating hair, and two metallic molded parts (3, 4) for styling, especially ironing, curling, or waving hair, said two metallic molded parts (3, 4) preferably being made of aluminum or an aluminum alloy. The hair can be inserted between facing contact surfaces (5, 6) of the molded parts (3, 4) while the molded parts (3, 4) can be changed from an open to a closed state. In order to ensure particularly good sliding properties for hair, at least some areas of the contact surfaces (5, 6) are provided with an enamel.

Description

The hair styling appliance

The invention relates to a hair styling device with a handle part, at least one heating part for heating the hair and with two metallic, preferably made of aluminum or an aluminum alloy moldings for molding, especially smoothing, curls or waves of hair, the hair inserted between facing moldings and the mold parts from an open to a closed state (and vice versa) can be transferred.

State of the art

Such a hair styling device is known for example from EP 1 030 571 B1. The metallic moldings of these hair-styling devices are coated with a thin layer of lacquer or, in the case of molded parts made of aluminum or an aluminum alloy, treated with the anodization process (to produce an oxide layer). These lacquer layers or oxide layers are applied to the moldings in order to achieve a smoother surface compared to the untreated metal surface of the moldings, so that when using the hair styling appliance, the hairs to be formed experience the least possible mechanical stress. This strain on the hair arises from the fact that the strand of hair to be formed is trapped between the molded parts during the treatment and acts on the strand of hair a locking force. The hair styling device is moved with a pulling force along a strand of hair, whereby the hair is heated by the heating part. The higher the tensile force applied to the hair, the more effective the shaping of the hair becomes. The size of the tensile force is limited upwards. This limit is determined on the one hand by an incipient damage to the hair due to the mechanical and the simultaneously acting heat stress resulting from the tensile effect. On the other hand, the user experiences an unpleasant train at the hairline, generated by the movement of the hair styling device relative to the hair at too high a tensile force. Therefore, measures must be taken to ensure that the hair is well formed on the one hand, but there is neither damage to the hair due to mechanical or heat stress, nor an unpleasant pull on the hairline of the user.

In the known hair styling devices with anodized contact surfaces made of aluminum or an aluminum alloy moldings, the average roughness depth is about 4 microns. However, this roughness depth does not preclude damage to the hair and an unpleasant pull on the hairline since the hair surface itself is a structural element.

BESTÄTIGUNGSKOP5E tur of 3 microns to 7.5 microns and therefore the hair slides poorly between the contact surfaces of the moldings. In addition, as a result of the unpleasant pull on the hairline, heat damage to the hair is more easily possible because the potential residence time of the hair between the contact surfaces is greater. Furthermore, it has been shown that in the case of galvanized surfaces of the contact surfaces, the hair is typically passed through too quickly, so that no satisfactory shaping result can be achieved.

problem

The object of the invention is therefore to provide a hair styling device with the features of the preamble of claim 1 that significantly reduces both damage to the hair and stress acting on the hair as well as an unpleasant train on the hairline of the user. At the same time, the heat input into the hair is to be optimized for shaping.

Invention and advantageous effects

This object is achieved in a hair styling device of the type mentioned according to the invention that the contact surfaces have at least partially enamelling. The enamels create a very gentle contact surface for the hair. Damage to the hair to be formed by mechanical stress and e- benso an unpleasant train at the hairline of the user are avoided. The hair slides neither too fast nor too slowly between the contact surfaces.

In contrast to the known surface coatings, enamelling is also extremely scratch-resistant, abrasion-resistant and wear-resistant, so that the contact surfaces also have a high and long useful value.

Due to the smooth surface of the enamel layer, which however is not too smooth for this application, the contact surfaces provided with it are also particularly easy to clean and have very good sliding properties for the hair even at high temperatures.

Furthermore, such enamels are compared to the known surface coatings in hair-styling devices also lightfast and color resistant and particularly corrosion resistant due to the special scratch, abrasion and wear resistance. Compared to painted or anodized surfaces, the enamel surface does not practically change during use, but retains a consistently pleasing appearance and high utility value over the useful life of the device.

To be particularly advantageous, it has been found that the metallic moldings of an aluminum wrought alloy with alloys of magnesium and / or silicon having a Mg content between 0-1.5%, preferably between 0.3-0.9% and optionally a second Zulegie- supply component Si have. Such an alloy is eg AIMgSi _{o, 5} .

It is particularly advantageous to completely enamel the facing contact surfaces of the moldings. By this measure, a uniform heat input from the contact surfaces on the hair to be formed and the homogeneous smooth surface of the contact surfaces ensures a particularly gentle and stress-free treatment of the hair.

In order to avoid stresses during enamelling and the subsequent cooling in the enamelling moldings, which may occur when only the contact surface is enameled, it is recommended that the surface of the moldings to enamel completely. Insofar as the mold parts are formed as hollow extruded profiles, it is sufficient to enamel the outwardly facing surfaces of the moldings, since stresses that could lead to their damage due to the brittleness of enamels occur mainly on the outwardly directed surfaces of hollow bodies.

According to a further advantageous embodiment of the invention, the layer thickness of the enamel is 10 microns to 140 microns, preferably 40 microns to 120 microns. Advantageously, however, the layer thickness is at least 40 μm.

According to another advantageous embodiment of the invention, the metallic moldings as a base layer on a chromating or phosphating, on which the enamel layer is applied. Such pretreatments, in particular with Cr ³ or PO ₄ ² complexes, serve as adhesion promoters between the metallic surface of the molded parts and the enamel layer. As a result, a particularly stable connection or adhesion between metallic molding and enamel layer is given. This effect can also be achieved by roughening the metallic surface of the moldings before enamelling. This can be done for example by irradiation with fine corundum particles. Of course, this irradiation can also be carried out before chromating or phosphating the surfaces.

According to a separate idea of the invention - independently or in combination with the features of the other claims - at least one of the molded parts has a rounded inlet and / or outlet edge, which extends along the running in the longitudinal direction boundary of at least one molded part. As a result, it is always ensured that the hair is gently formed when entering and leaving the hair strand in or out of the hair styling device. At the entry and exit edges then no sharp edges are present that could damage individual hair or exert an unpleasant train on the hairline of the user.

It has proven to be advantageous that the inlet and / or outlet edge has a radius of 0.5 mm to 5 mm, preferably of 1 mm. As a result, a particularly gentle shaping of the hair is guaranteed because sharp edges of the molded parts can neither act on the hair when entering nor when the hair is expelled from the device. Damage to the hair is also prevented in this respect.

According to a further, separate idea of the invention, that is also independent of the features of the other claims or in combination with these, at least one of the mold parts is provided on its the other part facing the contact surface with at least two spacers, through which a gap between the contact surfaces ( 5, 6) is formed. This ensures that all the hair of the strand of hair, in particular to the last hair through the hair styling device easily slip through and are not torn or act at the end of the strand undesirably high tensile forces, when there are less and less hair between the two moldings.

This embodiment is particularly effective when the spacers are formed as Kugelsegmentkalotten with a radius of 1 to 8 mm, in particular with a radius of 6mm and from the contact surface by 0.1 to 1 mm, preferably by 0.15 mm to 0, 25 mm, lift off. As a result, an approximately matched to the hair diameter and the surface structure of the hair space between the contact surfaces in the closed state is created so that individual hair at the end of the strand can not be torn or undesirable high tensile forces on individual hair can act. If che or flat, thin moldings are used and in addition enamelling takes place, the entire surface of the moldings should be enamelled, so that any compressive stresses occurring are distributed symmetrically. As a result, bends of such thin moldings are avoided, which can occur in one-sided enamelling due to the high compressive stress occurring.

It has also proven to be advantageous to arrange these elevations at opposite ends of a molded part, so that the most stable possible juxtaposition of the two mold parts is guaranteed. As a result, the clamping force has approximately the same size over the entire contact surfaces.

According to a further advantageous embodiment of the invention, at least one of the mold parts is releasably held on the holding part. This makes it possible to remove the at least one molded part, for example, for the purpose of cleaning or replace it completely. Likewise, it is thereby possible to use different structural configurations, in particular different geometries of the molded part, for example for smoothing or waves or curls of the hair. This variant of the invention proves to be particularly favorable in terms of manufacturing technology.

embodiment

Other objects, advantages, features and applications of the present invention will become apparent from the following description of an embodiment with reference to the drawings. All described and / or illustrated features alone or in any meaningful combination form the subject matter of the present invention, also independent of their summary in the claims or their dependency.

Show it:

Figure 1 is a schematic side view of a first gas-powered hair styling device with a fixed and a movable arm according to the invention

Figure 2 is a schematic side view of a first electrically operated hair styling device with two pincers movable arms according to the invention and 3 shows a sectional view along the line 1-1 in Figure 1.

The hair styling device according to FIGS. 1 and 2 has a grip part 1 and a heating part 2. The heating part 2 is arranged on the handle part 1 in an extension thereof and can be heated electrically (see FIG. 2) or gas-operated (see FIGS. 1 and 3). The Harrformgerät of Figure 1 for this purpose in the handle 1 a replaceable gas cartridge (not shown) as an energy source, which supplies a catalyst 16 (see Figure 3) in the heating part 2 for flameless combustion with energy. The hair styling device of Figure 2 is connected by a cable 17 to the mains, that an electric heater (not shown) in the heating part 2 is energized.

In the hair styling device according to FIG. 1, only the heating part 2 has two pliers-like arms 10, 11 which are spring-loaded against one another and press on one another. In this case, one of the arms 11 is fixedly connected to the handle 1. The second arm 10 is pivotable about the fulcrum 14 by pressing the operating lever 12 in the direction of arrow 13 from the first arm 11. Thereby, the second arm 10 can be moved relative to the first arm 11 in the direction of arrow 15 in an open and closed position. The normal position in this hair styling device, in which no lever is actuated, in this case, the closed position, in which both arms abut each other.

In the hair styling device according to FIG. 2, both the heating part 2 and the grip part 1 are divided into two spring-loaded, pressing tong-like arms 18, 19, which are spring loaded against each other. Both arms are connected via a swivel joint with spring tension 25. The normal position, in which no force is exerted on the arms 18, 19, in this case, the open position in which both arms 18, 19 spaced form an acute angle to each other.

It is understood that any combinations between the two embodiments of Figure 1 or 2 or with other hair styling devices are alternatively formed. The present hair styling devices according to Figures 1 and 2 are hair straighteners, ie the hair to be smoothed is inserted between the arms 10, 11, 18, 19 and pulled through the effect of a certain contact force on the arms and heat in the arms and smoothed. Alternatively, the additional action of particular hot steam between the arms on the hair is possible. Furthermore, the hair styling device according to Figure 1 to 3, two metallic, in the present case made of aluminum moldings 3, 4, wherein the heating part 2 is formed as a molded part 3. It is also possible to form these two parts separately. Furthermore, it is also possible to assign the mold part 4, a separate further heating part, so that both opposing moldings are heated. Also, only the other molded part 4, which - according to Figure 1 - is not arranged on the handle part, be heated.

The heating part 2 is formed as an elongated heating element with a substantially circular cross-section. The mold parts 3, 4 have a flat contact surface on which the hair is formed on. However, others, e.g. circular or curved with a radius cross-sections of the contact surfaces conceivable. By the heating part 2, a longitudinal axis of the hair styling device is determined.

Hair styling devices of the present type are in particular formed with two mold parts with substantially planar surfaces between which the hair can be inserted, comparable to a pair of pliers. Such hair styling devices are used in particular for hair straightening.

The molded parts 3, 4 have an enamel coating on their contact surfaces 5, 6 in order to achieve the optimum smoothness or roughness of the contact surfaces 5, 6. The roughness value Rz measured over a reference path length of 1.25 mm is 0.1-1 μm, preferably 0.1 to 0.3 μm. The enamel contains this glass body, which at about 500 ° C to 570 ⁰ C to the aluminum alloy containing magnesium and possibly silicon, are melted. This temperature is significantly lower than in a comparable steel enamel and is therefore also gentler, since no high thermal stresses occur in the aluminum alloy. The enamel coating establishes the necessary balance between the pressure and the optimal sliding of the hair, which is only less achievable with other coatings.

Furthermore, in the present exemplary embodiment, two (FIG. 1) elevations or spacers 9, 20 are arranged on the molded part 4, which prevent a direct contact of the contact surfaces 5, 6 of the molded parts 3, 4 with one another. The elevations preferably have a radius of about 6 mm and form over the flat contact surface a projection that stands out about 0.2 mm. As a result, a gap in the height of the elevations, here formed with 0.2mm between the contact surfaces. Two elevations are preferably arranged centrally on the contact surfaces at the end regions on the longitudinal axis. However, there are also other educations with eg 4 surveys that are not complementary to each other abutment, see Fig. 2, possible. In hair straighteners without such elevations, there is the problem that the force exerted the pressing force of the contact surfaces of the mold parts 3, 4 on hair cause such a strong train that individual hairs are torn between the contact surfaces. The train is especially the largest, just before the hair is pulled out of the space between the contact surfaces, because then only a few hairs are available. However, if the pressing force is reduced, the shape result on the hair is also deteriorated. The elevations now cause the hair strand inserted between the arms just before it slides out of the mold parts are loaded with a lower pressure force, because the elevations form a gap between the moldings. The surveys are so sublime that this advantage comes especially at low Haarrestmengen between the moldings to bear and on the other hand, the hair from the gap formed unimpaired with the required pressure force are malleable.

In order to avoid damage or too high stress on the hair to be formed when running in or out of the hair strand from the hair styling device, the molding 4 is provided with a rounded inlet edge 7 and a rounded outlet edge 8 (see Figure 3).

The moldings 3,4 are formed of extruded aluminum. These profile materials produce optimally flat contact surfaces with at the same time best thermal stability even in the heating phase with a temperature gradient in the molded part.

If the hair styling device is closed without hair being inserted, then the molded part 4 lies with its elevations 9, 10 against the molded part 3 or the heating part 2. This condition is maintained by acting on an actuating lever 15 spring. This is the state in which the hair styling device is usually stored or transported (normal state for the hair styling device of Figure 1).

For use, the hair styling device is opened and the user places the hair to be formed between the mold parts 3 and 4. Then the hair styling device is closed and, as explained, pressed with the spring force of the actuating lever 12 associated spring against a stop. The hair is heated by the heating part 2 and compressed between the mold parts 3 and 4. On the hair acts a pressing force. The user can now form the inserted hair with the hair styling device. It is essential that the hair is only slightly loaded when pulling through the hair styling device, since the frictional force between the contact surfaces 5, 6 and the hair is minimized by the enamelling of the contact surfaces 5, 6. Thus, at best, the hair has very little stress and no unpleasant tension is created on the hairline of the user. This effect is further enhanced by the rounded inlet and outlet edges 7, 8. Due to the low friction, the hair slides particularly easily between the contact surfaces 5, 6, the mold parts 3, 4 along.

The dome-shaped elevations 9, 10 contribute to the fact that the hair to be formed during use of the hair styling device suffer no stress and also for the user no unpleasant tensile stresses on the hairline occur. Through the elevations 9, 20, 21, 22, 23, 24 are the contact surfaces 5, 6 of the mold parts 3, 4 in their entirety never directly to each other.

Claims

claims

1. hair styling device with a handle part (1), at least one heating part (2) for heating the hair and with two metallic, preferably made of aluminum or an aluminum alloy moldings (3, 4) for shaping, in particular straightening, curls or waves of hair, wherein the hair between mutually facing contact surfaces (5, 6) of the mold parts (3, 4) can be inserted and the mold parts (3, 4) can be transferred from an open to a closed state, characterized in that the molded parts (3, 4) as Aluminiumstrangpreßprofile are formed and the contact surfaces (5, 6) at least partially have enamelling.

2. Hair-styling device according to claim 1, characterized in that the metallic molded parts (3, 4) are formed from the aluminum alloy with alloys with magnesium and / or silicon.

3. Hair styling device according to claim 1 or 2, characterized in that the aluminum alloy of the molded parts (3, 4) has Zulegierungen of 0-1, 5% Mg, in particular from 0.3 to 0.9% Mg.

4. hair styling device according to one of claims 1 to 3, characterized in that the contact surfaces have a roughness of about 0.1-1 microns.

5. Hair styling device according to one of claims 1 to 4, characterized in that the contact surfaces have a roughness of 0.1 to 0.3 microns.

6. Hair-styling device according to one of the preceding claims, characterized in that the layer thickness of the enamel is 10 microns to 140 microns, preferably 40 microns to 120 microns.

7. Hair-styling device according to one of the preceding claims, characterized in that the metallic molded parts (3, 4), have a chromating or phosphating. 8. Hair styling device according to one of the preceding claims, characterized in that at least one of the molded parts (3, 4) in the region of its longitudinal extent arranged boundary a rounded inlet and / or outlet edge (7,

8), which extends along the boundary running in the longitudinal boundary of the at least one molded part (3, 4).

9. hair styling device according to claim 8, characterized in that the inlet and / or outlet edge (7, 8) has a radius of 0.5 mm to 5 mm, preferably of 1 mm.

10. Hair styling device according to claim 1, characterized in that at least one of the mold parts (3, 4) on the other mold part (4, 3) facing the contact surface (5, 6) or an adjacent surface arranged parallel thereto with at least two projecting spacers (9, 20, 21, 22, 23, 24) is provided as a spacer, through which a gap between the contact surfaces (5, 6) is formed.

11. Hair styling device according to claim 10, characterized in that the spacers (9, 10) are formed as Kugelsegmentkalotten.

12. Hair styling device according to claim 11, characterized in that the Kugelsegmentkalotten have a radius of 1 to 7 mm.

13. Hair styling device according to claim 10, characterized in that the spacers from the contact surface or adjacent parallel surface by 0.005 mm to 0.5 mm, preferably by 0.1 mm to 0.25 mm, stand out and a corresponding gap around the spacers between the contact surfaces is formed.

14. Hair styling device according to claim 1, characterized in that remote from the contact surfaces of the Aluminiumstrangpreßfolie sections, in particular exclusive attachment areas to form the housing halves.