EP0052325B1 - Hair-dressing apparatus - Google Patents

Description

The invention relates to a hairdressing device with a hot air nozzle and a hollow body provided with openings, which is connected to an air suction device.

Such a hairdressing device is known (DE-AS 27 54 304). A hair dryer is provided, either the pressure side or the suction side of which can be connected via a flexible hose to a brush which is designed as a hollow body provided with openings. The hairdresser picks up the hair with one hand while holding the hair dryer in the other hand. This double-sided handling is disadvantageous. Furthermore, in the known device - when connecting the brush to the suction side of the hair dryer, so that the above-mentioned device is created - disadvantageous that an air circuit is formed between the hair dryer and the brush, which is quickly saturated with moisture, so that no effective drying takes place.

The invention has for its object to provide a hairdressing device of the type mentioned, which can be handled with only one hand, and which is also suitable for rolling, shaping, dehumidifying and drying the hair. The drying should be faster than with the known devices and also a larger variety of hairstyles should be possible.

This object is achieved according to the invention in that, for rolling up, shaping, dehumidifying and drying the hair, the hollow body is formed by a rotationally driven hair reeling cylinder (2) with a smooth surface intended for the hair (7) and the device being U-shaped Has structure, the hair roller cylinder (2) forming one leg of the U-shape and the hot air nozzle (3) the other leg of the U-shape such that the hot air nozzle (3) at a certain distance from the surface of the hair roller (2) directed and is also pivotable such that it flows tangentially onto the hair wound on the hair reeling cylinder (2) in the direction of rotation.

If the hair comes into contact with the slotted hair roller, which is connected to the air suction device, the hair rests on the smooth surface. Due to the suction effect of the rotating slits, the hair is taken up and kept in a rolled up form, the smooth surface of the hair rolling cylinder sliding along the inside of the rolled up hair. In this position, the hot air is blown perpendicularly to the axis of the cylinder, but tangentially to the wound hair in the direction of rotation. It flows through the hair and is sucked off from the inside. This takes place without the air being saturated with a moisture-conducting circuit. Due to the tangential flow against the hair in the direction of rotation of the hair roller, d. H. - related to the hair - from the hair root to the hair tip, the hair gets a very special shine because then the dandruff on the hair surface is brought to close contact. The device results in extremely quick shaping, dehumidification and drying of the hair, while the possibility of one-handed operation, leaving the other hand of the hairdresser free for additional work with a comb or a brush, also opens up new possibilities for shaping. The distance between the hot-air nozzle and the hair roller cylinder, which is predetermined by the device due to the U-shaped structure, prevents the hot-air nozzle from getting too close to the hair and thereby damaging it. This results in a gentler hair treatment and faster drying at the same time.

A device according to the invention differs from a device according to US Pat. No. 3,894,547 in that in this device the hair roller is not connected to an air suction device. There is therefore no contact of the hair on the outside of the hair roller due to the suction caused by the air suction device at the slots. Rather, the slots are provided to allow combs to reciprocate radially during rotation of the hair reeling cylinders so that the hair is mechanically gripped by the combs. In their end position, the combs protrude above the surface of the hair roller, so that it cannot be addressed as "smooth". In addition, the hot air nozzle is not pivoted so that the hair wound on the hair roller can flow tangentially.

DE-G 7719754 shows a circular-cylindrical suction tube 12 provided with slits onto which a double comb with prongs is attached. This suction pipe is connected to the suction side of the hair dryer, which emits the hot air on the pressure side parallel to the longitudinal axis of the suction pipe; the aim is to at least partially achieve a certain air cycle. However, this device must be turned by hand, since the suction pipe with the comb is stationary. With this guidance, it also seems likely due to the flow paths and cross sections that only a very small amount of the hot air emitted by the hair dryer parallel to the axis of the suction pipe is sucked in again. This device, in conjunction with the above-mentioned US Pat. No. 3,894,546, gives no suggestion to design the hollow body with a smooth surface in a rotationally driven manner for rolling up the hair and, at the same time, arranging the hair reeling cylinder and hot air nozzle in the shape of the legs of a U-shape.

In US Pat. No. 3,213,860 there is a rotatable, slotted hair roller cylinder seen. However, it is a hair winder in which the hair tips are drawn into the slots by suction and wound onto a wrap which then remains detached from the device on the head for further hair treatment. The situation is similar with a device according to FR-PS 2 320 711, in which the strand of hair is drawn into a spiral chamber for the purpose of drying, for example. In DE-OS 28 50 515 a curling iron is provided with an air guide body concentrating the hot air flow on the winding body, wherein either the air guide body or the winding body are axially displaceable. The situation is similar in US Pat. No. 3,901,249, in which a brush can be adjusted manually by means of an actuating lever in relation to a hot air nozzle which is adjustable at a distance.

In addition to the solution shown, the invention also comprises several advantageous developments. The hair roller cylinder can preferably be plugged into the hairdressing device, so that different hair roller cylinders with different dimensions and different properties can be used. A further development provides that the hair roller cylinder is driven via a slip clutch (frictional engagement between the wheels forming the drive), which is set so that no unpleasant or undesirable tension is exerted on the hair. This slip clutch can be operated via an operating lever on the handle. The drive of the hair roller can be regulated from 0 to a certain value by changing the pressure. On the smooth surface of the hair roller, the z. B. can be particularly smoothed by polishing, preferably some pins are provided for orientation of the hair.

The hair dryer, which provides the hot air supply to the hot air nozzle, is driven and, in terms of its air supply, is independent of the air extraction device which is connected to the hair roller. The hair dryer preferably blows off the hot air axially parallel to the hair roller cylinder, the hot air then being deflected toward the surface of the hair roller cylinder.

A further advantageous development of the invention provides that two different positions of the hot air nozzle are also possible in accordance with the two possible directions of rotation of the hair roller, in order to enable the tangential flow of the hair in the direction of rotation in accordance with the direction of rotation. The electrical coupling is preferably provided in such a way that when the hot air nozzle is pivoted, the direction of rotation of the hair roller is reversed at the same time.

• Figur 1 eine schematische Darstellung der Handhabung eines Ausführungsbeispiels ;
• Figur 2 eine perspektivische Darstellung des Ausführungsbeispiels (ohne Luftabsaugvorrichtung) ;
• Figur 3 einen Schnitt durch das Ausführungsbeispiel ;
• Figur 4 eine Ansicht des Ausführungsbeispiels in Richtung der Pfeile IV-IV in Fig. 3 ;
• Figur 5 einen Schnitt entlang der Linie V-V in Figur 3 ;
• Figur 6a und 6b eine Draufsicht bzw. Seitenansicht eines Schaltringes 49, wie er bei dem Ausführungsbeispiel Verwendung findet;
• Figur 7a und 7b eine Draufsicht bzw. Seitenansicht eines Kontaktringes 51, wie er bei dem Ausführungsbeispiel Verwendung findet ;
• Figur 8 eine schematische Darstellung der Anströmung einer Haarsträhne 7, die auf einen Haaraufrollzylinder 2 aufgewickelt ist ;
• Figur 9 eine Modifikation des beim Ausführungsbeispiel verwendbaren Haaraufrollzylinders 2.

Further details of the invention and its advantageous developments emerge from the description given below of an exemplary embodiment, which makes reference to the accompanying drawings. They represent:

• Figure 1 is a schematic representation of the handling of an embodiment;
• Figure 2 is a perspective view of the embodiment (without air suction device);
• Figure 3 shows a section through the embodiment;
• Figure 4 is a view of the embodiment in the direction of arrows IV-IV in Fig. 3;
• 5 shows a section along the line VV in Figure 3;
• 6a and 6b are a top view and a side view of a switching ring 49 as used in the exemplary embodiment;
• FIGS. 7a and 7b are a top view and a side view of a contact ring 51, as used in the exemplary embodiment;
• Figure 8 is a schematic representation of the flow of a strand of hair 7, which is wound on a hair roller 2;
• FIG. 9 shows a modification of the hair roller 2 that can be used in the exemplary embodiment.

As can be seen from FIG. 1, the hairdressing device has a housing 1, a rotationally driven hair reeling cylinder 2 and a hot air nozzle 3. The hair roller cylinder 2 has air suction slots 4 and is connected to an air suction device 6 via a hose 5. This is constructed similarly to the air extraction device of a vacuum cleaner, so it is essentially formed by a correspondingly powerful fan.

When the device is designed as a compact home device for self-service in domestic use, the air suction device on the housing, for. B. at the rear end.

Due to the negative pressure existing at the air intake slots 4 of the hair roller 2, hair or a strand of hair 7 adheres to the surface of the rotating hair roller and is taken up or wound up. At the same time, hot air flows from the hot air nozzle 3 towards the wound hair. This results in drying and good shaping of the strand of hair 7 at the same time.

The structural design results in detail from FIGS. 3 and 4. As can be seen there, the hair roller cylinder 2 provided with the air intake slots 4 is closed on its end face. The surface is smoothly polished so that the hair, once rolled up, slides on the surface of the hair roller. On the right side in FIG. 3, the hair roller cylinder 2 is provided with a cone or frustoconical extension tube piece 8 which is open towards the right. With the cone 8, the hair roller cylinder 2 is inserted in a correspondingly conical receiving opening 9 of a hollow shaft 10 Part of the housing 1 is stored. The right end of the hollow shaft 10 merges into one in the housing 1 provided hollow line 17 to which the hose 5 is coupled with the aid of a coupling sleeve 18. A vacuum which is effective on the hose 5 and is generated by the air suction device 6 thus takes effect from the inside at the air suction slots 4.

The hollow shaft 10 is driven by a DC motor 19. Its output shaft 20 is part of the DC motor 19. This shaft is coupled to the sleeve 22 in the direction of rotation by means of a pin 21. The sleeve 22 is connected to a further sleeve 24 via a metal bellows coupling 23. This further sleeve 24 is shrunk onto the shaft 25, so that there is a fixed connection of the output shaft 20 and shaft 25 in the direction of rotation. This shaft 25 is supported in the actuating lever 26 by means of two ball bearings. Furthermore, the shaft 25 is fixedly connected to a drive wheel 27. In the position of the actuating lever 26 shown in FIG. 3, the drive wheel 27 is in engagement with the friction wheel 28. This friction wheel 28 is keyed to the hollow shaft 10 with the aid of a wedge 29 and provided with a friction lining 30. A spacer sleeve 31, a spring 32 and a pressure plate 33 are also provided between the locking ring 14 already mentioned and the friction wheel 28.

As can be seen from FIG. 5, the actuating lever 26 is rotatably mounted in the handle 16 in the area of the metal bellows coupling 23 with the aid of two pivot pins 34. A spring 35 is arranged between a projection in the actuating lever 26 and a corresponding projection in the handle 16, which presses the actuating lever 26 into the dot-dash position 26 '. It can therefore be pressed from position 26 'into the position shown in solid lines. The swiveling movement taking place is carried out by the unit formed by sleeve 24, shaft 25 and drive wheel 27, since the connection of this unit to sleeve 22 is made movable by the metal bellows coupling 23. In position 26 ', the drive wheel 27 is not connected to the friction wheel 28, so that the hollow shaft 10 is not driven. On the other hand, in the position of the actuating lever 26 shown in solid lines, the drive wheel 27 is connected to the friction wheel 28, so that the hollow shaft 10 is driven. When using the device, the hairdresser grips the handle 16 with one hand and presses the actuating lever 26 with his fingers. So this connection is a slip clutch; d. H. depending on whether and how strong the frictional engagement takes place, with more or less slippage, the entrainment of the friction wheel 28 by the drive wheel 27 and accordingly a more or less fast drive of the hollow shaft 10 and with it the hair roller cylinder 2.

It is clear that various alternative options for realizing a slip clutch are also available to the person skilled in the art. The drive unit shown here is only to be understood as an example.

In the upper part 36 of the housing 1, a hair dryer 37 with corresponding air heating devices (not shown) is provided, through which air is blown by a blower 38. The air is sucked in through suction slots 58 which are provided in the housing. The power supply to the motor 39, like the power supply to the motor 19, takes place via the cable 40.

The air emerges from the hair dryer 37 in the direction of the arrows 41 and enters the hot air nozzle 3. A deflection grid 42 is provided in this. This is formed by a plurality of deflection plates 43 which are fastened to a holder 44. The deflection takes place in such a way that the hot air emitted by the hair dryer 37 emerges from the hot air nozzle 3 in the direction of the arrows 45.

The hot air nozzle 3 is pivotally attached to the upper part 36 of the housing by means of a connecting ring 46. The connecting ring is provided with two beads 47 and 48 which engage behind corresponding shoulders in the upper part 37 and the component forming the nozzle. In order to enable the beads to snap behind the shoulders, the connecting ring 47 can be slit in the longitudinal direction at one point on its circumference.

It is now further provided that when the hot air nozzle 3 is pivoted, the direction of rotation of the electric motor 19 is switched simultaneously. This can be implemented as follows: The connecting ring 46 is designed such that it can only be rotated with respect to the hot air nozzle 3, but not with respect to the upper housing part 36. This can be achieved, for example, in that any nose (not shown) provided along the circumference of the bead 48 snaps into a corresponding recess on the upper housing part 36.

Furthermore, a switching ring 49 is pressed into the connecting ring 46, as is shown in detail in FIGS. 6a and 6b. This switching ring is provided with two diagonally opposite switching contacts 50 along its circumference. At the same time, the contact ring 51 shown in FIGS. 7a and 7b is pressed into the hot air nozzle 3. This is shown in FIGS. 7a and b and has a contact track 52 and 54, respectively. If, on the one hand, the contact track 52 and, on the other hand, the two contact pins 53 and 54 are connected to the connections of a voltage source, this voltage is present at the contacts 50 with different polarity in the two rotational positions designated I and 11. The drive motor 19 is then connected to the contacts 50. In this respect, the direction of rotation of the motor 19 depends on the position of the hot air nozzle 3 relative to the upper housing part. It is then further provided that the rotational position of the hot air nozzle 3 on the upper housing part is limited. However, the corresponding stops are not included in FIG. 3 for the sake of simplicity.

The two pivot positions I and 11 of the hot air nozzle 3 are also shown in FIG. 4 in relation to the hair roller 2. These two pivot positions are assigned to the directions of rotation of the hair reeling cylinder 2 that are switched on so that the hair wound on the hair reeling cylinder is blown tangentially from the hot air nozzle 3, in the direction of the hair tip. This is expressed in FIG. 4 in that the position I and the arrow indicating the assigned direction of rotation are drawn in solid lines, the position 11 and the arrow indicating the assigned direction of rotation are shown in dash-dotted lines.

A switch 55 is also provided on the upper housing part 36 and is used to switch the motors 39 and 19 on and off. The course of the electrical lines is not shown in detail; however, it is obvious to the person skilled in the art how this should be done: so that it can be dispensed with in the present context.

• (a) die Oberfläche des Haaraufrollzylinders 2 ist hochpoliert. Dadurch kann die Haarsträhne auf dem sich drehenden Haaraufrollzylinder 2 gleiten, wenn sie einmal aufgewickelt ist. Der Zug, der dabei an der Haarsträhne durch Reibung mit dem sich drehenden Haaraufrollzylinder 2 entsteht, ist relativ schwach und wird nicht unangenehm empfunden ;
• (b) die Rutschkupplung zwischen Antriebsrad 27 und Reibrad 28 kann so eingestellt werden, daß wenn der Zug am Haar einen bestimmten Wert überschreitet, das Antriebsrad 27 auf dem Reibrad 28 rutscht und kein Antrieb mehr stattfindet. Im übrigen hängt das auch davon ab, wie stark die Bedienungsperson den Betätigungshebel 26 andrückt.

Figure 8 is used to explain the principle of operation. It shows how a strand of hair 7 is wound in a counterclockwise direction, corresponding to the direction of rotation of the hair roller 2. As already described, two measures ensure that there is no excessive tension on the strand of hair:

• (a) The surface of the hair roller 2 is highly polished. This allows the lock of hair to slide on the rotating hair roller 2 when it is wound up. The pull that occurs on the strand of hair due to friction with the rotating hair roller 2 is relatively weak and is not perceived as unpleasant;
• (b) the slip clutch between the drive wheel 27 and the friction wheel 28 can be adjusted so that when the pull on the hair exceeds a certain value, the drive wheel 27 slips on the friction wheel 28 and no more drive takes place. Otherwise, this also depends on how hard the operator presses the operating lever 26.

At the beginning of the winding of a strand of hair 7, this is taken along in the direction of the rotation of the hair roller 2 in that the individual hairs are brought into contact with the air suction slots 4 by the negative pressure. They are then taken along and wound around the circumference in that these slots 4, on which the negative pressure acts, rotate. The slits 4 are thus practically rotating vacuum sources along a cylindrical surface, which ensure that the hair is picked up, wound up and held.

It is of particular importance that the hair in this position is heated on the one hand by the hot air flow from the hot air nozzle 3 and thus dried, but at the same time this hot air, which absorbs moisture when it comes into contact with the hair, is discharged into the interior of the cylinder. In other words, unlike normal air flow from a hot air stream, in which a certain amount of drying first takes place on the surface, but the moisture is then deposited in a deeper layer of hair, in the invention, the hot air is removed after it Has absorbed moisture. The drying is done twice by blowing the hair with hot air and by sucking off the moisture-containing air. Therefore, drying takes much less time than drying with a hair dryer.

• (a) tangential,
• (b) in Richtung von der Haarwurzel zur Haarspitze, wobei
• (c) das Haar auf dem Haaraufrollzylinder 2 in der gewünschten Form gehalten wird, eröffnet eine optimale Formgebung. Es hat sich herausgestellt, daß diese Formgebung besonders dauerhaft ist, wenn nicht nur die Trocknung sondern auch die Abkühlung des Haares in der gewünschten Form erfolgt. Auch das kann mit dem vorliegenden Frisiergerät erreicht werden. Zu diesem Zweck ist es lediglich notwendig, die Heizung des Föns kurz auszuschalten. Das kann durch entsprechende Umschalter, die der Einfachheit halber nicht dargestellt sind, ohne weiteres von einem Fachmann vorgesehen werden.

The inflow of wound hair strand 7:

• (a) tangential,
• (b) in the direction from the hair root to the hair tip, where
• (c) the hair on the hair roller 2 is held in the desired shape, opens an optimal shape. It has been found that this shape is particularly durable if not only drying but also cooling of the hair takes place in the desired shape. This can also be achieved with the present hairdressing device. For this purpose it is only necessary to briefly switch off the heating of the hair dryer. This can easily be provided by a person skilled in the art by means of appropriate switches, which are not shown for the sake of simplicity.

You can also in the exhaust duct, d. that is, arrange a moisture sensor (not shown) in the path of the extracted air, which leads to an automatic shutdown of the heating of the hair dryer. As soon as the humidity of the exhaust air falls below a certain value, indicating that the hair is dry.

Finally, when using the new hairdressing device, it is important that the manner in which the strand of hair is wound onto the hair roller 2 ensures that the tips also lie in the desired direction during the entire drying process.

Compared to the conventional way of styling by winding a strand of hair on a comb or brush and subsequent blow-drying, the styling device still has the advantage that there is always a distance between the hot air nozzle and the hair that is predetermined by the design of the device, which prevents that the operator moves the hair dryer too close to the hair and heats the surface too much to save time.

FIG. 9 shows a hair roller cylinder 56, which represents a modification of the hair roller cylinder 2. It differs from the latter in that several rows of pins 57 are provided along the circumference. They are used when winding up strands of hair or hair to ensure that even when sliding on the hair reeling cylinder their position along the circumference thereof perpendicular to the axis maintain and do not tilt.

Finally, Fig. 9 shows that for a particular hairdressing device of the type described here, several different hair reeling cylinders can be provided, which differ in size, number and dimensions. the air intake slots, by length, by circumference, by different surface properties, etc. They can all be inserted into the receiving opening 9, provided that the extension tube pieces 8 have the same dimensions. One can then provide a set of hair roller cylinders, which can be used for a wide variety of hairdressing tasks.

Claims (10)

1. Hair styling device with a hot air nozzle and with a hollow body provided with openings, said hollow body being connected to air suction means, characterized in that for curling, forming, dehumindizing and drying of the hairs the hollow body is formed by a rotation-driven hair curling cylinder (2) with a smooth surface, against which the hairs (7) lean, and in that the device as a U-shaped construction, whereby the hair curling cylinder (2) formes the one leg of the U-form the hot air nozzle (3) is directed to the surface of the hair curling cylinder (2) in a predetermined distance and can be tilted in such a manner that it blows the air tangentially to the hair, which is wound on the hair curling cylinder (2) in the direction of rotation.

2. Hair styling device in accordance to claim 1, characterized in that the openings in the hair curling cylinder (2) are made in the form of air suction slots (4) extending parallel to the axis.

3. Hair styling device in accordance to claim 1, characterized in that the hair curling cylinder (2) is provided with a frustro-conical extension (8), which is insertable into the receiving opening (9) of a rotation-driven hollow shaft (10), and in that the air suction means (6) is connected with the interior space of the hair curling cylinder (2) through the hollow shaft (10).

4. Hair styling device in accordance to claim 1, characterized in that the driving-means for the hair curling cylinder (2) is made -by means of a frictional contact of a driving wheel (27), driven by an electrical motor (19), with a further wheel (28), which is coupled to the hair curling cylinder (2).

5. Hair styling device in accordance to claim 4, characterized in that the pressure, with which the driving wheel (27) engages the further wheel (28), is controllable by an operating lever (26).

6. Hair styling device in accordance to claim 1 or one of the following, characterized in that there are provided on the surface of the hair curling cylinder (56) pins (6) for orienting the hairs (7).

7. Hair styling device in accordance to claim 1, characterized in that the supply of hot air to the hot air nozzle (3) is made by a blower (37), the supply of which with fresh air is independent of the air suction means (6).

8. Hair styling device in accordance to claim 7, characterized in that the hot air (41) is discharged by the blower (37) parallel to the axis of rotation of the hair curling cylinder (2) and is deflected rectangularly by the deflecting baffles to the surface of the hair curling cylinder.

9. Hair styling device in accordance to claim 8, characterized in that the hot air nozzle (2) is tiltable between two positions (I, II), such that upon rotation of the hair curling cylinder in the first direction of rotation the hair is hit by the air flow tangentially from the hair root to the hair tip, and in the second position a tangential flow of the hot air to the hair from the hair root to the hair tip is effected, when the hair curling cylinder rotates in the opposite direction of rotation.

10. Hair styling device in accordance to claim 9, characterized that in the said positions (I, II) electrical contact elements (50, 51) are connected to each other in such in manner that they control the driving motor (19) for the hair curling cylinder (2) in the respective direction of rotation.

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