DE102019118772A1 - Hairdryer - Google Patents

Abstract

The invention relates to a hair dryer (1) with a housing (16) which has a handle section (2) and a hair treatment section (3) with first air outlet openings (10) and second air outlet openings (12) for the delivery of warm and / or cold air for the Drying of hair introduced into the hair treatment section (3), wherein the hair treatment section (3) comprises a first inner arm (7) with a first inner surface (9) and a second inner arm (8) with a second inner surface (11) wherein the first and second inner arms (7, 8) extend along the longitudinal axis of the housing (16), the first inner surface (9) and the opposing second inner surface (11) of the hair treatment section (3) forming a gap (13), the gap width being suitable for receiving the hair and for the warm and / or cold air to escape, so that the hairs placed in the gap (13) lie freely in the hair treatment section (3), characterized in that the first inner arm (7) and the second inner arm (8) are rotatably arranged within the housing (16) about the longitudinal axis of the housing (16), the first and second inner arms (7, 8) ) extend along the longitudinal axis of the housing (16), wherein in a first rotational position of the first inner arm (7) and the second inner arm (8), in which the first inner arm (7) is congruent to a first outer arm (14) and the second inner arm (8) are arranged congruently to a second outer arm (15) and wherein the first outer arm (14) the first inner arm (7) and the second outer arm (15) the second inner arm (8) surrounds positively, the gap (13) is opened to the maximum, and in a second rotational position that deviates from the first rotational position, the angle between the first rotational position and the second rotational position being less than or equal to 90 degrees, the gap (13) at least partially closed is.

Description

The present invention relates to a hair dryer.

Conventional hair dryers work on the physical principle according to which warm air can absorb significantly more water than cold air. The moist air is transported away via the air flow generated in the device.

There are hairdryers in a wide variety of shapes and sizes. Typically hair dryers have a handle, a blower, a heating area, and a nozzle through which heated air flows to provide a heated air stream to a user's hair. A hot air blower consists of a tube in which the blower and a heating coil behind it are located, which heats up strongly and transfers the heat to the air passing by. The air is usually sucked in by the fan at the rear end of the housing and accelerated past the heating coil to the front exhaust opening. Typically the nozzle is cylindrical in shape and heated air exits through one end of the nozzle in one direction. When applied to the hair of the user, the heated air typically heats the outer surface of the hair of the user first and only after a certain time does the heat penetrate the underlying hair. To speed up the process of heat penetrating the underlying hair, a user may lift their hair with a brush. It would be desirable to provide a hair dryer that more uniformly transports and distributes heat to the user's hair. It would also be desirable to provide a hair dryer that would speed up the hair drying process through a more uniform application of heated air.

The object of the present invention is therefore to provide an improved hair dryer with a new type of housing which is particularly adapted to dry the hair gently, efficiently, faster and more uniformly.

The object of the present invention is achieved by a hair dryer with a housing, which comprises a handle section and a hair treatment section with first air outlet openings and second air outlet openings for the delivery of warm and / or cold air for drying hair introduced into the hair treatment section, the hair treatment section having a a first inner arm having a first inner surface and a second inner arm having a second inner surface, the first and second inner arms extending along the longitudinal axis of the housing, the first inner surface and the opposing second inner surface of the hair treatment portion form a gap, the gap width being suitable for receiving the hair and for the warm and / or cold air to escape, so that the hairs inserted into the gap lie freely in the hair treatment section, characterized in that the first inner arm and de r second inner arms are rotatably arranged within the housing about the longitudinal axis of the housing, wherein the first and the second inner arms extend along the longitudinal axis of the housing, wherein in a first rotational position of the first inner arm and the second inner arm in which the first inner arm congruent to a first outer arm and the second inner arm are arranged congruently to a second outer arm and wherein the first outer arm surrounds the first inner arm and the second outer arm positively surrounds the inner arm, the gap is opened to the maximum, and in a second rotational position that deviates from the first rotational position, the angle between the first rotational position and the second rotational position being less than or equal to 90 degrees, the gap is at least partially closed.

The advantages of the novel housing concept described here are, in particular, that the energy used, in particular the thermal energy and the kinetic energy of the hot air flow, are brought more specifically to the hair to be dried. As a result, the hair drying process can be carried out more energy-efficiently and / or faster than is the case with hair drying with a conventional pistol grip. This works particularly well with longer hair. In addition, a very homogeneous drying of the hair can be achieved through the targeted application of the heated air stream. In particular, the risk of overheating and / or overdrying, as is often observed when using conventional hair dryers, is significantly reduced here. The novel housing concept of the hair dryer according to the invention thus makes an effective contribution to protecting the hair.

The hair treatment section comprises a first surface and a second surface opposite thereto, at least one of the surfaces being provided with air outlet openings. The first and the second surface of the hair treatment section form a gap between them which has a constant gap height for receiving the hair and for the warm air to escape. The hair treatment section encloses a treatment space between the two surfaces which are delimited so that there is a space between them, e.g. B. define a pliers-like enclosed space for carrying out and treating the hair.

Warm and / or cold air emerges from the housing of the hair dryer again through the air outlet openings.

A spatial separation of the hair treatment section from the handle section can be achieved. This allows the grip area to be thermally insulated.

The gap width between the first and the second inner arm is preferably about 20 to 60 mm, more preferably about 30 to 50 mm and particularly preferably about 40 to 45 mm.

Basically, the air in the flow channel is fed to a heating source or electromagnetic radiation source, such as. B. a heating wire, a heating wire coil or an IR radiation source heated. In order to absorb enough heat, the entire air flow is preferably directed over the heating source. To adjust the temperature of the heated air, i. H. of the hot air flow, a part can be led around the heating source via a bypass.

In a further embodiment it is provided that the first air outlet openings are arranged on the first inner surface of the first inner arm and the second air outlet openings are arranged on the second inner surface of the second inner arm, the first air outlet openings and the second air outlet openings being designed to contain at least one To direct part of a stream of warm air and / or a stream of cold air onto the hair placed in the gap.

In principle, when using the hair dryer, a strand of hair is inserted or threaded into the gap in the hair dryer, and the hairdryer is guided along the strand away from the head to dry the hair. As a result, in contrast to a conventional hair dryer, warm air is released onto the strand of hair from one or two sides from the air outlet openings directed towards the gap, ie from a small distance from the hair, which then causes the water on the hair surface to evaporate, which then evaporates is transported away from the gap or evaporates. This means that the temperature of the warm air can also be lower than in conventional hair dryers.

In a further embodiment, the housing has in the transition area between the grip section and the hair treatment section a cylindrical, annular rotation element, the cylindrical annular rotation element being rotatably mounted in the housing about the longitudinal axis of the housing, the cylindrical annular rotation element being designed to hold the first inner arm and rotate the second inner arm within the housing about the longitudinal axis of the housing from the first rotational position to the second rotational position and vice versa and to any rotational position between the first and second rotational positions.

By rotating the cylindrical, ring-shaped rotating element around the longitudinal axis of the housing, the user can move the hair dryer from the configuration according to the invention (first rotational position) in which the first inner arm is congruent to the first outer arm and the second inner arm is congruent to the second outer arm, so that the gap is open to a conventional configuration (second rotational position) in which the inner arms are rotated 90 degrees with respect to the outer arms and thus the gap is closed, and are transferred to any position in between. Thus, by rotating the rotary element, the user can switch the hair dryer from a first operating mode, in which the air exits the first and second air outlet openings from the first and second inner surface, respectively, into a second operating mode, in which air flows from the front of the hair dryer from third and / or fourth air outlet openings occurs.

In a further embodiment it is provided that the cylindrical ring-shaped rotation element comprises a rotating ring and a cylindrical component, the cylindrical component having a guide stub on its lateral surface, the rotating ring being rotated by the longitudinal axis of the housing and the gap is coupled to a rotation of the cylindrical component about the longitudinal axis of the housing and the gap, the hair treatment section further comprising at least one cylindrical and / or semi-cylindrical protective shield, which has a guide slot on its outer surface, wherein the Rotation of the rotating ring and the cylindrical component around the longitudinal axis of the housing and the gap of the guide stub is guided along the guide slot of the at least one cylindrical and / or semi-cylindrical protective shield, with the guide stub of the cylindrical component rotating around the longitudinal axis of the housing and the gap the length of the guide slot of the at least one cylindrical and / or semi-cylindrical protective shield is limited.

The cylindrical, annular rotating element comprises a rotating ring which is embedded in the housing of the hair dryer. In the assembled state of the hair treatment section, a cylindrical component with a guide stub is arranged on its outer surface under the rotating ring. The rotating ring and the cylindrical component form the rotating element with which the inner arms are rotated about the longitudinal axis of the housing and the gap relative to the rigid outer arms.

On a part of the inner arms, adjacent to the rotating element, two semi-cylindrical protective shields are arranged. These protective shields each have a guide slot on their outer surface, which in the assembled state form a common slot for guiding the guide stub of the cylindrical component when it rotates around the longitudinal axis of the housing and the gap. The length of the guide slot determines the extent of the rotation of the rotary element about the longitudinal axis of the housing and the gap. In one embodiment, the guide slot is designed to be so long that the maximum permissible rotation of the inner arms relative to the outer arms is 180 degrees.

In a further embodiment it is provided that the cylindrical, annular rotation element has first ribs on its outer jacket surface.

This makes it easier for the user to grasp and rotate the rotary element. If one of the ribs contrasts with the other ribs in color, there is also the option of tracking how far the rotary element has been turned.

In a further embodiment, the first air outlet openings are arranged on the first inner surface and / or the second air outlet openings on the second inner surface in a matrix-like manner, the first and second air outlet openings having polygonal cross-sectional planes, the first and second air outlet openings optionally having a honeycomb structure.

The air outlet openings can have any size and shape that is suitable for transferring the warm air to the strand of hair. For example, individual round, oval or rectangular holes can be provided in the first and second surfaces, or the first and second surfaces are designed in the form of a grid through which the warm air can flow. The mesh width of the grid should expediently be chosen so that a strand of hair cannot penetrate the housing and be damaged on the heating element.

In a further embodiment it is provided that the first air outlet openings on the first inner surface and / or the second air outlet openings on the second inner surface are arranged at an angle to the longitudinal axis of the housing.

As a result, the air flow emerging from the housing of the hair dryer in the direction of the gap advantageously emerges from one side or from both sides of the gap at an angle α to the longitudinal axis of the gap. The strand of hair placed in the gap is thus flowed through with warm and / or cold air from obliquely above to obliquely below. The strand of hair stays better in the gap and is not carried out of the gap again by the air flow. At the same time, the strand of hair lying in the gap is smoothed somewhat.

In a further embodiment, the first air outlet openings on the first inner surface and the second air outlet openings on the second inner surface are arranged at an angle to the transverse axis of the housing.

As a result, the air flow emerging in the direction of the gap can advantageously be directed somewhat backwards in the direction of the grip section. The strand of hair placed in the gap stays in the gap better when blow-drying and is not blown out of the gap again.

In a further embodiment it is provided that the first rotary position when the gap is open corresponds to a first operating state of the hair dryer and the second rotary position when the gap is at least partially closed corresponds to a second operating state of the hair dryer.

In the first operating state, a strand of hair is inserted into the opened gap and blow-dried in the gap, with cold and / or warm air exiting the hair dryer into the gap. In the second operating state, in which the gap is completely closed, the user's hair is blow-dried in a conventional manner, with cold and / or warm air emerging from the front of the hair dryer.

In the first rotational position, the first inner arm and the first outer arm and the second inner arm and the second outer arm are congruent to one another. In the second rotational position, the first inner arm is rotated at an angle of 90 degrees about the longitudinal axis of the gap and the second inner arm is rotated at an angle of 90 degrees about the longitudinal axis of the gap.

In a further embodiment, the first outer arm, the second outer arm, the first inner arm and the second inner arm each have the shape of a half cylinder.

This advantageously results in a tubular channel in the second rotational position of the inner arms, so that the hair dryer can be used in the conventional manner. In the first rotational position of the inner arms, where these are congruent to the outer arms, there is advantageously a gap.

In a further embodiment it is provided that the first inner arm and / or the second inner arm have a bevel running at an angle on their side facing away from the handle section.

In this way, in the first rotational position of the inner arms, a possible gap formation between the first outer and inner arm and between the second outer and inner arm when they are in a congruent position to one another is avoided, so that no hair can get tangled between the outer and inner arms.

In a further embodiment, the first inner surface and / or the second inner surface comprises a planar plane or a convexly curved surface and / or a concavely curved surface.

The configuration of the first inner surface of the first inner arm and the second surface of the second inner arm can be designed variably: either as a plane, as a convex surface and / or as a concave surface.

In a further embodiment it is provided that warm air and / or cold air escapes from the first air outlet openings on the first inner surface and from the second air outlet openings on the second inner surface in the first operating state with the gap open to the maximum when the first inner arm and the second inner arm are in the first rotational position, with no warm air and / or cold air escaping from the first air outlet openings on the first inner surface and from the second air outlet openings on the second inner surface in the second operating state with the gap at least partially closed when the first inner arm and the second inner arm are in the second rotational position.

As a result, the two above-described operating states of the hair dryer can be implemented in an advantageous manner. In the second operating state at the second rotary position, instead of the first and second air outlet openings, warm and / or cold air exits from third and / or fourth air outlet openings, the third and fourth air outlet openings being at the end of the first outer arm and at the end of the second outer arm on the front of the hairdryer. In the first operating state, with the inner arms in a congruent position with respect to the outer arms, again no air emerges from the third and / or fourth air outlet openings.

In a further embodiment, the gap between the first inner arm and the second inner arm at the mouth of the first and second inner arm has a local rounding in the transverse profile, so that the gap in the transverse profile has a U-shape, with the local rounding optionally being applied a base of the U corresponds to a semicircle.

Due to the lack of corners and edges in the area of the mouth of the first and second inner arm, the hairs placed in the gap cannot tilt or tangle.

In a further embodiment it is provided that the first outer arm and / or the second outer arm has at least one thermal insulation plate on its surface facing away from the gap, the at least one thermal insulation plate optionally comprising a plurality of second ribs arranged in parallel.

The thermal insulation plate advantageously provides for potential overheating of the hair dryer in the housing of the hair treatment section.

In a further embodiment, the first inner arm and the second inner arm are part of a U-shaped injection-molded part, which is rotatably arranged around the longitudinal axis of the housing, the U-shaped injection-molded part being designed to open the gap by rotating around the longitudinal axis of the housing to close at least partially.

As a result, in the first operating state in the first rotational position of the inner arms when blow-drying a strand of hair in the gap, the gap is advantageously not too hot, because the plastic used has a low thermal conductivity. In addition, the nature of the inner plastic arms helps reduce the weight of the hair dryer.

In a further embodiment it is provided that the injection molded part is designed in two parts, a first part comprising the first inner arm and a second part comprising the second inner arm, the first and second parts being connectable to one another by a plug connection.

The U-shaped gap can thus be assembled quickly and reversibly from relatively simply built components. If one of the inner arms is defective, it can be replaced more quickly with a new inner arm.

In a further embodiment it is provided that the cylindrical, annular rotation element and the first inner arm and the second inner arm are coupled to one another in a rotationally invariant manner and / or form a multi-part or one-part component, with the multi-part component optionally comprising a cylindrical component and a first and a second plate-shaped coupling element, the cylindrical component and the first coupling element being mounted between the cylindrical, annular rotation element and the first inner arm, wherein the cylindrical component and the second coupling element are supported between the cylindrical annular rotating element and the second inner arm.

A rotation of the cylindrical, annular rotation element thus advantageously causes a direct rotation of the inner arms about the longitudinal axis of the gap. The cylindrical component and the first and second plate-shaped coupling elements can also be injection-molded parts made of plastic, so that there is thermal insulation.

In a further embodiment it is provided that the first outer and the second outer arm are a rotationally invariant fixed component of the housing of the hair dryer.

Because only the inner arms are rotatably mounted, while the outer arms are rigidly mounted to the housing, only one rotation element is required for the relative rotation of the inner arms to the outer arms. The handling of the hair dryer is thus simplified and a change from one operating state to another is made easier.

In a further embodiment, the hair dryer has first air transport passages within the first outer arm and second air transport passages inside the second outer arm, the first air transport passages and the second air transport passages running along the longitudinal axis of the hair treatment section, the first air transport passages fourth air outlet openings and the second air transport passages Have air outlet openings at the end of the first outer arm and / or the second outer arm facing away from the handle portion, the first and the second air transport passages being designed to convey warm and / or cold air from the interior of the hair dryer to the third and / or fourth air outlet openings to transport, wherein the third and / or fourth air outlet openings are designed to let the warm and / or cold air escape from the hairdryer.

In this way, the second operating state of the hair dryer, in which cold and / or warm air emerges from the front of the hair dryer, can be realized in an advantageous manner. In the second rotational position, warm air flows from the heating element via the first air transport passages inside the first outer arm and via the second air transport passages inside the second outer arm to the third and fourth air outlet openings at the end of the outer arms at the front of the hair dryer. The hair dryer can therefore also be operated in a conventional manner.

In an alternative embodiment, the air inlet openings are preferably located on the back of the respective arms of the hair dryer, i.e. on the top of the upper arm or on the underside of the lower arm, followed in the direction of flow by a number of heat sources for heating the air drawn in and a number of air outlet openings in the hair treatment section.

The volume flow of the warm air is preferably adjustable or controllable. Nozzles or covers or fan wheels with adjustable power or speed can be used for this. A stronger stream of warm air can shorten the drying time of the hair. The user can preferably set the air volume flow individually at will using the control switch provided in the handle section of the hair dryer. Alternatively, the volume flow can also be adapted to the moisture or residual moisture of the hair using appropriate sensors.

For example, to support drying at the hairline, additional air outlet openings can be attached in the area of the hair treatment section on the edge of the housing, which direct at least part of the warm air flow onto the hairline, in particular against the hair treatment direction. The additional air outlet openings direct the flow of warm air into an area that is not covered by the treatment section in order to achieve more homogeneous drying. In particular, the areas of the hairline are basically so close to the head that they can only be grasped by the treatment section with difficulty or not at all due to the gap geometry and the housing arranged around it. The additional air outlet openings therefore direct the warm air into these areas. For this, the warm air is expelled, for example, at an angle to the plane in which the treatment is carried out. In order to specify the direction, the openings can be attached to the side housing area of the arms and optionally be provided with guide plates which direct the airflow onto the hairline area. This promotes the drying of the hair, especially in the hairline area. The additional air outlet openings can either be permanently open or can optionally be closable in order to give the user the option of optionally supporting the drying of the hairline.

One cause for the failure of heating sources can be mechanical or thermal loads on the heating sources, especially in the case of IR radiation sources. Therefore, in a further preferred embodiment, the hair dryer comprises mechanical or thermal protection means for the heating source.

Mechanical loads can primarily be strong accelerations or forces, e.g. B. when placing the hair dryer on a firm surface after use, d. H. when heated. In order to reduce the accelerations and the forces associated therewith, according to a preferred embodiment, the hair dryer can comprise spring elements and / or damping elements for holding the heating source in the housing as mechanical protection means. A resilient storage can, for. B. can be realized by spring elements that connect the bracket to the housing. Alternative examples are damping elements made of flexible plastic or silicone or hydraulic or pneumatic damping elements. The damping elements are selected, among other things, according to where they are to be installed and what ambient conditions (e.g. temperature) prevail there.

Preferred thermal protection means are, for example, means for air cooling the heating source and / or thermocouples and / or mechanical barriers between the heating source and the hair treatment section.

As with practically all hot air-based hair dryers, it cannot be completely ruled out that this new type of housing concept will lead to overheating, especially of the heat sources. The air flow passed through the housing of the hair dryer can therefore be used as a means for cooling the heating source. For this purpose, for example, corresponding air flow guide elements, d. H. Parts or components for the separation, discharge or line of bypasses etc. are located. These preferably divide the air flow in such a way that part of it is used specifically to cool the heating source in the event of overheating, and via additional openings, e.g. B. air slots, is transported away in the housing, and the other part is used to dry the hair. These additional openings have the advantage that a cooling air flow can be maintained along the heating sources, although the air outlet openings in the hair treatment section are largely or completely closed. Thus, the risk of the heating sources overheating can also be largely avoided if the main air outlets, past which the strands of hair are pulled, are blocked by strands of hair or soiling. The additional openings can be designed to be flexible so that they can, for. B. to increased air pressure such as a pressure relief valve or to increased temperature, z. B. using the bimetal effect, react by opening. Alternatively, a temperature limiter can be installed, which preferably reversibly switches off the heating source when a previously defined temperature is exceeded. After falling below a defined lower temperature, the heating source can then be reactivated. This can be accompanied by an acoustic, optical or mechanical warning signal, for example, so that the user is made aware of the overheating or recognizes that the normal operating state has been reached again. Basically, the same types of temperature limiters, such as. B. Thermocouples are used as with conventional hair dryers. Alternatively, other thermocouples can be used, such as. B. Thermocouples, the values of which are read out and evaluated in order to switch off when a first limit value is exceeded or switch on again after falling below a second limit temperature. Preferred positions of the temperature limiters are in the vicinity of the air outlet openings and / or in the vicinity of the heating source.

Further details, features and advantages of the invention emerge from the drawings and from the following description of preferred embodiments with reference to the drawings. The drawings merely illustrate exemplary embodiments of the invention, which do not restrict the essential inventive concept.

Figure list

• 1 shows the hair dryer according to the invention 1 from a frontal oblique view.
• 2 shows the hair dryer according to the invention 1 from diagonally in front.
• 3 shows the hair dryer according to the invention 1 of the page.
• 4a shows the hair treatment section 3 , where the gap 13 between the first outer and second outer arms 14th , 15th through the first inner and second inner arms 7th , 8th closed is.
• 4b shows the hair treatment section 3 , where the gap 13 between the first outer and second outer arms 14th , 15th is open, with the first inner arm 7th congruent to the first outer arm 14th and the second inner arm 8th congruent to the second outer arm 15th stand.
• 5 Figure 13 shows an exploded view of the hair treating section 3 .
• 6th shows an exploded view of the inner arms 7th , 8th and the rotating element 20th .
• 7a shows the hair treatment section 3 from obliquely in front with an open gap 13 .
• 7b shows the hair treatment section 3 from the side with the gap open 13 . The first inner surface 9 and / or the second inner surface 11 can be flat, concave or convex.
• 8th shows the hair dryer according to the invention 1 from behind.
• 9 shows the construction of the hair dryer 1 inside the case 16 with a view from above.
• 10 shows the hairdryer 1 of the page.
• 11 shows the hairdryer 1 in a front view.
• 12 shows the hairdryer 1 from above in an exterior view.
• 13 shows the airflow as it flows through the inside of the housing 16 horizontal blower 5 arises.

Embodiments of the invention

1 shows the hair dryer according to the invention 1 from a frontal oblique view. The hair dryer has a handle portion 2 and a hair treatment section 3 as well as a rear housing area 4th in which there is a fan 5 and a heating element 6th are located on. The hair treatment section 3 is formed from a first inner arm 7th and a second inner arm 8th which are arranged like pliers to one another or form the legs of a U. The first inner arm 7th has a first inner surface 9 with first air outlet openings 10 on, the second inner arm 8th has a second inner surface 11 with second air outlet openings 12 on. The first inner arm 7th stands for the second inner arm 8th so opposite that the first inner surface 9 and the second inner surface 11 are plane-parallel to each other and the first air outlet openings 10 and the second air outlet openings 12 both towards the through the first inner arm 7th and the second inner arm 8th formed gap 13 point. The first inner arm 7th with the first inner surface 9 with the first air outlet openings 10 and the second inner arm 8th with the second inner surface 11 with the second air outlet openings 12 are thus arranged in mirror image to one another, with the mirror axis in the middle of the gap 13 runs along its longitudinal axis.

The first inner arm 7th is in a first rotational position of the inner arms 7th , 8th form-fitting and congruent from a first outer arm 14th surrounded, the second inner arm by a second outer arm 15th . Thereby form the first outer arm 14th and the second outer arm 15th rotationally invariant, fixed parts of the housing 16 of the hair dryer 1 .

In the gap 13 of the hair treatment section 3 the user's hair is inserted. Through the first air outlet openings 10 and the second air outlet openings 12 if heated and / or cold air flows in, the air enters the gap 13 inserted hair is supplied with warm air and / or cold air from two sides. Depending on how the first and second air vents 10 , 12 opposite the first or second surface 9 , 11 are inclined, the warm air and / or cold air enters parallel to or at an angle to the first inner surface 9 or second inner surface 11 out. In one embodiment, the warm and / or cold air occurs parallel to the first inner surface 9 and to the second inner surface 11 down through the gap 13 out so that it's in the gap 13 inserted hair strands are more or less smoothed when blow-drying. In a further embodiment, the warm and / or cold air occurs at an angle to the first inner surface 9 and to the second inner surface 11 from the first and second air outlet openings, respectively 10 , 12 out down through the gap 13 through it, the angle being between 0 and 90 degrees. In a further embodiment, the warm and / or cold air passes through the first or second air outlet openings 10 , 12 such that the resulting warm or cold air flow backwards in the direction of the handle section 2 flows so that the into the gap 13 inserted strand of hair in the gap when blow-drying 13 remains.

The first inner arm 7th , the second inner arm 8th , the first outer arm 14th and the second outer arm 15th have an inclined bevel on the front of the hair dryer. The first outer arm 14th has third air outlet openings on the front edge of the hair dryer 17th on. The second outer arm 15th has fourth air outlet openings on the front edge of the hair dryer 18th on. From these third and fourth air vents 17th , 18th warm and / or cold air emerges from the front of the hair dryer, which corresponds to a normal hair dryer mode.

The handle section 2 has control switch 19th to switch the hair dryer on or off, to regulate the temperature and to regulate the fan speed.

2 shows the hair dryer according to the invention 1 from diagonally in front. The first inner arm 7th is congruent to the first outer arm 14th turned, the second inner arm 8th congruent to the second outer arm 15th so the one between the first and second outer arm 14th , 15th formed gap 13 is open. You can clearly see it on the front of the hair dryer 1 at the end of the gap the third air outlet openings 17th of the first outer arm 14th and the fourth air outlet openings 18th of the second outer arm 15th .

On the handle section 2 are the control switches 19th , namely an on and off switch, a switch for temperature control and a switch for controlling the fan speed are arranged.

3 shows the hair dryer according to the invention 1 of the page. Between the hair treatment section 3 and the handle portion 2 is a cylindrical, ring-shaped rotating element 20th that ribs first on its mantle surface 21st for better turning around the extended longitudinal axis of the gap 13 having. Using this rotation element 20th the first inner arm and the second inner arm can 7th , 8th versus the rotationally invariant outer arms 14th , 15th around the longitudinal axis of the gap 13 be rotated and the gap 13 close.

4a shows the hair treatment section 3 , where the gap 13 between the first outer and second outer arms 14th , 15th through the first inner and second inner arms 7th , 8th closed is. In this rotational position of the inner arms 7th , 8th towards the outer arms 14th , 15th can the hair dryer according to the invention 1 can be operated in a normal hair dryer mode by drawing warm and / or cold air through the third air outlet openings 17th of the first outer arm 14th and through the fourth air outlet openings 18th of the second outer arm 15th front at the end of the gap 13 from the hairdryer 1 exit.

4b shows the hair treatment section 3 , where the gap 13 between the first outer and second outer arms 14th , 15th is open, with the first inner arm 7th congruent to the first outer arm 14th and the second inner arm 8th congruent to the second outer arm 15th stand. In this rotational position of the inner arms 7th , 8th towards the outer arms 14th , 15th can the hair dryer according to the invention 1 can be operated in the hair dryer mode according to the invention by warming and / or cold air through the first air outlet openings 10 of the first inner arm 7th and through the second air outlet openings 12 of the second inner arm 8th each in the direction of the gap 13 and / or in a downward direction through the gap 13 through from the hairdryer 1 exits and / or in the direction of the handle portion 2 emanates.

5 Figure 13 shows an exploded view of the hair treating section 3 . The first outer arm is shown on the left 14th and the second outer arm 15th as rotation-invariant components of the housing 16 of the hair dryer 1 . In the middle are the first inner and the second inner arm 7th , 8th , which are rotationally invariant with the cylindrical, annular rotating element 20th are connected, ie a rotation of the rotary element 20th causes the inner arms to rotate 7th , 8th towards the outer arms 14th , 15th . The other components are used for protective cover or thermal insulation (protective shields 28 , 29 ) or for connection to the rest of the housing 16 of the hair dryer 1 (Inner cylinder 30th and outer cylinder 31 ). The protective shields 28 , 29 are designed essentially semi-cylindrical and each have a guide slot on their outer surface 32 on, which runs in a circular arc on the respective lateral surface of the respective semi-cylindrical protective shield.

6th shows an exploded view of the inner arms 7th , 8th and the rotating element 20th . The first inner arm is shown on the left 7th and the second inner arm 8th , which can each be made from injection molding and via a plug connection 27 can be connected to each other. The components of the rotary element are shown on the right 20th , which has a rotating ring 22nd and a cylindrical component 23 includes. Between the inner arms 7th , 8th and the rotating element 20th connecting disk-shaped structural components 24 are connected. The cylindrical component 23 has a guide socket on its outer surface 33 on.

7a shows the hair treatment section 3 from obliquely in front with an open gap 13 . On the first inner surface 9 of the first inner arm 7th are the first air outlet openings 10 arranged in the form of a matrix. On the second inner surface 11 of the second inner arm 8th are the second air outlet openings 12 arranged in the form of a matrix.

7b shows the hair treatment section 3 from the side with the gap open 13 . The first inner surface 9 and / or the second inner surface 11 can be flat, concave or convex. Under the rotating bezel 22nd of the rotary element 20th is the cylindrical component 23 arranged. The semi-cylindrical protective shields 28 , 29 cover part of the inner arms 7th , 8th and the cylindrical component 23 . The guide socket is in the assembled state 33 of the cylindrical component 23 in the guide slot 32 of the semi-cylindrical protective shields 28 , 29 . When rotating the rotating ring 22nd around the longitudinal axis of the housing 16 and the gap 13 the guide socket moves 33 inside the guide slot 32 of the semi-cylindrical protective shields 28 , 29 around the longitudinal axis of the housing 16 and the gap 13 . Here is the rotation of the rotating ring 22nd with the rotation of the guide socket 33 coupled. The rotation of the Guide socket 33 around the longitudinal axis of the housing 16 and the gap 13 is determined by the length of the guide slot 32 of the semi-cylindrical protective shields 28 , 29 limited. In one embodiment, the guide connector 33 by a maximum of 180 degrees around the longitudinal axis of the housing 16 and the gap 13 with the help of the rotating ring 22nd be rotated. In the assembled state, part of the length of the guide slot is here 32 the semi-cylindrical protective shield 28 assign and part of the length of the guide slot 32 the semi-cylindrical protective shield 29 . Ie the guide slot 32 is supported by the semi-cylindrical protective shield 28 and the semi-cylindrical protective shield 29 formed when the semi-cylindrical protective shield 28 and the semi-cylindrical protective shield 29 are mounted together.

8th shows the hair dryer according to the invention 1 from behind. In the back of the case 4th is a blower 5 arranged that the ambient air in the housing 16 of the hair dryer 1 sucks.

9 shows the construction of the hair dryer 1 inside the case 16 with a view from above. Between the fan 5 in the back of the case 4th and the inner and outer arms 7th , 8th , 14th , 15th is a heating element 6th arranged by which cold air is heated to warm air.

10 shows the hairdryer 1 of the page. In the front area of the housing 16 , in the lateral outer area of the outer arms 14th , 15th each is a thermal insulation board 25th arranged. The respective thermal insulation board 25th has a number of second ribs 26th on, which is parallel to the longitudinal axis of the gap 13 run, whereby the surface for heat dissipation is enlarged.

11 shows the hairdryer 1 in a front view. The inner arms 7th , 8th are not congruent to the outer arms 14th , 15th placed so that the gap 13 in the hair treatment section 3 closed is. On the front edge of the outer arms 14th , 15th are the third and fourth air vents 17th , 18th arranged through which cold and / or warm air passes when the gap 13 closed is.

In the handle section 2 are the control switches 19th arranged for switching on and off, for temperature control and for speed control.

12 shows the hairdryer 1 from above in an exterior view. Inner and outer arms 7th , 8th , 14th , 15th are congruent to each other, so that the gap 13 is open. The gap 13 is U-shaped. In the gap 13 are the first inner surface 9 of the first inner arm 7th and the second inner surface 11 of the second inner arm 8th arranged largely parallel to each other. In the outer area of the outer arms 14th , 15th each is a thermal insulation board 25th arranged. The element of rotation 20th is near the gap 13 arranged. With the help of the rotation element 20th become the inner arms 7th , 8th towards the outer arms 14th , 15th turned. The outer arms 14th , 15th form a rotationally invariant part of the housing 16 of the hair dryer 1 .

13 shows the airflow as it flows through the inside of the housing 16 horizontal blower 5 arises. In the back of the hair dryer 1 is the ambient air through the blower 5 sucked in. Inside the case 16 the air flows to the heating element 6th and is heated there. From the heating element 6th the heated air flows into the interior of the inner arms 7th , 8th and occurs on the first inner surface 9 or second inner surface 11 via the first and second air outlet openings, respectively 10 , 12 towards the gap 13 downwards, either in a strictly vertical direction ( 13a) downwards or diagonally downwards ( 13b) .

List of reference symbols

1

Hairdryer

2

Handle section

3

Hair treatment section

4th

rear housing area

5

fan

6th

Heating element

7th

first inner arm

8th

second inner arm

9

first inner surface

10

first air outlet openings

11

second inner surface

12

second air outlet openings

13

gap

14th

first outer arm

15th

second outer arm

16

casing

17th

third air outlet openings

18th

fourth air outlet openings

19th

Control switch

20th

Rotation element

21st

first ribs

22nd

Rotating ring

23

cylindrical component

24a,

24b connecting disc-shaped structural component, plate-shaped coupling element

25th

Thermal insulation board

26th

second ribs

27

Connector

28, 29

Protective shield

30th

Inner cylinder

31

Outer cylinder

32

Guide slot

33

Guide socket

Claims (10)

Hair dryer (1) with a housing (16) which has a handle section (2) and a hair treatment section (3) with first air outlet openings (10) and second air outlet openings (12) for the discharge of warm and / or cold air for drying in the Hair treatment section (3), wherein the hair treatment section (3) comprises a first inner arm (7) with a first inner surface (9) and a second inner arm (8) with a second inner surface (11), the first and second inner arms (7, 8) extend along the longitudinal axis of the housing (16), the first inner surface (9) and the opposite second inner surface (11) of the hair treatment section (3) forming a gap (13) , wherein the gap width is suitable for receiving the hair and for the escape of warm and / or cold air, so that the hairs inserted into the gap (13) lie freely in the hair treatment section (3), characterized in that s the first inner arm (7) and the second inner arm (8) are rotatably arranged within the housing (16) about the longitudinal axis of the housing (16), the first and the second inner arm (7, 8) extending along the Longitudinal axis of the housing (16) extend, wherein in a first rotational position of the first inner arm (7) and the second inner arm (8), in which the first inner arm (7) is congruent to a first outer arm (14) and the second inner arm (8) are arranged congruently to a second outer arm (15) and wherein the first outer arm (14) surrounds the first inner arm (7) and the second outer arm (15) positively surrounds the second inner arm (8), the gap (13) is open to the maximum, and in a second rotational position which deviates from the first rotational position, the angle between the first rotational position and the second rotational position being less than or equal to 90 degrees, the gap (13) is at least partially closed. Hair dryer (1) Claim 1 , characterized in that the first air outlet openings (10) are arranged on the first inner surface (9) of the first inner arm (7) and the second air outlet openings (12) are arranged on the second inner surface (11) of the second inner arm (8) , wherein the first air outlet openings (10) and the second air outlet openings (12) are designed to guide at least part of a warm air flow and / or a cold air flow onto the hair placed in the gap (13). Hair dryer after Claim 2 , characterized in that the housing (16) in the transition area between the grip section (2) and the hair treatment section (3) has a cylindrical annular rotation element (20), the cylindrical annular rotation element (20) rotatable in the housing (16) about the longitudinal axis of the housing (16), wherein the cylindrical annular rotation element (16) is designed to the first inner arm (7) and the second inner arm (8) within the housing (16) around the longitudinal axis of the housing (16) of the first rotational position to the second rotational position and vice versa, as well as to any rotational position between the first and the second rotational position. Hair dryer (1) Claim 3 , characterized in that the cylindrical, ring-shaped rotation element (20) comprises a rotary ring (22) and a cylindrical component (23), the cylindrical component (23) having a guide stub (33) on its outer surface, with a rotation of the rotary ring (22 ) is coupled around the longitudinal axis of the housing (16) and the gap (13) with a rotation of the cylindrical component (23) about the longitudinal axis of the housing (16) and the gap (13), wherein the hair treatment section (3) furthermore at least one Cylindrical and / or semi-cylindrical shaped protective shield (28, 29), which has a guide slot (32) on its outer surface, with the rotation of the rotating ring (22) and the cylindrical component (23) around the longitudinal axis of the housing (16) and of the gap (13) the guide connection piece (33) is guided along the guide slot (32) of the at least one cylindrical and / or semi-cylindrical protective shield (28, 29), with a rotation ion of the guide socket (33) of the cylindrical component (23) around the longitudinal axis of the housing (16) and the gap (13) by the length of the guide slot (32) of the at least one cylindrical and / or semi-cylindrical shaped protective shield (28, 29) becomes. Hair dryer (1) according to one of the Claims 1 to 4th , characterized in that the first outer arm (14) and / or the second outer arm (15) on its surface facing away from the gap (13) has at least one thermal insulation plate (25), optionally the at least one Thermal insulation plate (25) comprises a plurality of second ribs (26) arranged in parallel. Hair dryer (1) according to one of the Claims 1 to 5 , characterized in that the first inner arm (7) and the second inner arm (8) are part of a U-shaped injection-molded part which is arranged rotatably about the longitudinal axis of the housing (16), the U-shaped injection-molded part being designed for this purpose to at least partially close the gap (13) by rotation about the longitudinal axis of the housing (16). Hair dryer (1) Claim 6 , characterized in that the injection molded part is designed in two parts, a first part comprising the first inner arm (7) and a second part comprising the second inner arm (8), the first and second parts being connectable to one another by a plug connection. Hair dryer (1) Claim 3 , characterized in that the cylindrical annular rotation element (20) and the first inner arm (7) and the second inner arm (8) are coupled to one another in a rotationally invariant manner and / or form a multi-part or one-part component, the multi-part component optionally being a cylindrical component (23) and a first and a second plate-shaped coupling element (24a, 24b), wherein the cylindrical component (23) and the first coupling element (24a) are mounted between the cylindrical annular rotation element (20) and the first inner arm (7) wherein the cylindrical component (23) and the second coupling element (24b) are supported between the cylindrical annular rotating element (20) and the second inner arm (8). Hair dryer (1) according to one of the Claims 1 to 8th , characterized in that the first outer and the second outer arm (14, 15) are a rotationally invariant fixed component of the housing (16) of the hair dryer (1). Hair dryer (1) according to one of the Claims 1 to 9 , characterized in that the hair dryer (1) has first air transport passages within the first outer arm (14) and second air transport passages within the second outer arm (15), the first air transport passages and the second air transport passages running along the longitudinal axis of the hair treatment section (3) , wherein the first air transport passages have third air outlet openings (17) and the second air transport passages have fourth air outlet openings (18) at the end of the first outer arm (14) and / or the second outer arm (15) facing away from the handle section (3), the first and the second air transport passages are designed to transport warm and / or cold air from the interior of the hair dryer (1) to the third and / or fourth air outlet openings (17, 18), the third and / or fourth air outlet openings (17, 18 ) are designed to let the warm and / or cold air escape from the hair dryer (1).

Images