Straightening blower brush

Abstract

The present invention relates to a portable straightening blower brush having a gripping handle and a blower head connected to the handle, the gripping handle having a blower module, the blower head having two air outlets located on either side of a pad that is heated, in use, by the air flow, the brush having a casing with an upper part and a lower part, the casing having within it an air-flow distribution element with an upper shell and a lower shell, the combination of which makes it possible to form two ducts for conveying the air flow towards the two air outlets, the brush having, between the inlet of the blower head and the outlet of the handle, a movable air-flow orientation device capable of tilting according to the direction of gravity and allowing the air flow to be automatically directed, in use, towards one of the two air outlets located on the side opposite the direction in which the movable air-flow orientation device tilts, the air outlet being closest to the root of the lock of hair.

Description

SMOOTHING BLOW BRUSH Object of the invention

[0001] The present invention relates to a blow-drying straightening brush that directs the airflow exiting the brush upstream and in the direction of straightening, tangentially to the hair strand. This effect is achieved by means of an airflow direction control device at the inlet of the blower head, which directs the airflow generated in the handle according to the direction of gravity. The gravity-sensitive airflow direction control device can optionally be motorized and electronically controlled, for example, using a gyroscope. State of the

[0002] Blower brushes are well known in the prior art. Documents CN117958544A (Hon Hai), CN118203190A (Shenzhen Soocas Technology) and CN112471732A (Sun Luen Electrical Manufacturing) disclose a blower brush with a removable comb and air outlets on the edge of the comb.

[0003] Document WO2024053858A1 (Samsung) discloses a hair dryer with a mechanism for diverting the airflow generated at the inlet of a tube.

[0004] Documents WO2023111500 and W02023111502A1 (Dyson) disclose a hair dryer attachment with three air outlets and configurations allowing the airflow to be directed in two different directions. Documents W02020109751 A1, EP3222165A1, and WO2017163066A1 (Dyson) disclose a brush attachment for a hair dryer, also with multiple possible air outlets.

[0005] Documents EP4385356A1, EP4355166A1, EP3845091A1 and EP4355167A1 (SEB) disclose a blower brush with several possible air outlets.

[0006] Finally, documents CN220024379U and CN218246109U (Guangdong Lifeng Electric Appliances) disclose a blower brush with a rotating air duct and document CN216534231U (Huizhou Weida Intelligent) discloses a blower brush in which the direction of the airflow is adjustable by a slide with plates allowing the airflow outlet to be directed. Objectives of the invention

[0007] The present invention aims to provide a smoothing blow brush that automatically directs the airflow from the blower head to adapt to the direction of straightening the hair strand, while allowing the airflow to be blown almost tangentially to the hair strand. Summary of the invention

[0008] The present invention discloses a portable blow-drying brush comprising a handle and a blower head connected to the handle, the handle comprising a blower module, the blower head comprising two air outlets located on either side of a heated pad, which, in use, is heated by the airflow, said brush comprising a casing with an upper and a lower part, said casing comprising within it an airflow distribution element with an upper shell and a lower shell, the combination of which forms two ducts for conveying the airflow to the two air outlets, said brush comprising, between the inlet of the blower head and the outlet of the handle, a movable airflow orientation device capable of tilting according to the direction of gravity and allowing automatic orientation, in use,the airflow towards one of the two air outlets located on the opposite side to the tilting of the mobile airflow orientation device, closest to the root of the hair strand.

[0009] Preferred embodiments of the invention include at least one, or any suitable combination, of the following features: the movable airflow orientation device is formed by a spoon mounted on a bearing or by a valve mounted on a pivot axis; the bearing is fixed to the upper shell of the air distribution element; the movable flap mounted on the pivot axis is positioned in an airflow distribution duct, said airflow distribution duct constituting a connecting piece allowing the assembly of the upper and lower shells of the air distribution element; the tilting of the mobile airflow orientation device according to the direction of gravity is assisted, in use, by a motor and electronically managed by gyroscopic effect; the upper part of the casing has an opening for a tip of an ionizer to eliminate static electricity generated by straightening hair strands; the roller has a metal surface equipped with combs and flat teeth for smoothing strands of hair; The lower shell has deflectors allowing the uniform distribution of airflow towards the air outlets located on either side of the skid.

[0010] The present invention also discloses a hair drying and straightening accessory that can be attached using an adapter to an airflow generator, said accessory having peripheral air outlets located on either side of a pad, the accessory having within it an airflow distribution element with an upper shell and a lower shell, the combination of which makes it possible to form two airflow ducts, said accessory having a movable airflow orientation device that tilts according to gravity and allows the airflow to be automatically directed, in use, towards the air outlet located on the opposite side to the direction of tilting of the movable airflow orientation device, as close as possible to the root of the hair strand. Brief description of the figures

[0011] The figures in this document are illustrations of the general concept of the present invention and shall not be construed as limitations thereof. Reference numbers are given only in the figures, the description of the figures, and in the claims.

[0012] Figures 1 and 2 respectively represent a general view and an exploded view of the main component parts of the smoothing blow brush (1) of this disclosure.

[0013] Figure 3 represents an exploded view of all the components of a possible embodiment of the smoothing blow brush (1) according to this disclosure.

[0014] Figure 4 shows an exploded view of the airflow distribution element (23). It comprises an upper shell (3) and a lower shell (4). The interlocking of the two upper and lower shells (3,4) guides the airflow through deflectors (8) towards the two air outlets at the periphery of the blower head.

[0015] Figure 5 represents the smoothing blow brush according to this disclosure with in transparency some variants of airflow direction devices (2) taken in magnifying glasses with respectively a “spoon” shaped direction device (201), or a “flap” shaped direction device (202), the third magnifying glass representing a motorized version (203) of the spoon-shaped device (201).

[0016] Figure 6 shows a cross-section where the upper and lower shells (3,4) are assembled and where the airflow direction device (2) is visible, mounted movably in the airflow distribution duct (14). The three representations show respectively in (A), the airflow direction device (2) tilted to the left to direct the air in the direction of the arrow towards the right outlet (72), in (B), the airflow direction device tilted upwards to direct the airflow towards the two outlets (71,72) and in (C), the airflow direction device tilted to the right to direct the airflow towards the left outlet (71).

[0017] Figure 7 shows a cross-section of the blower head where the upper and lower shells (3, 4) of the airflow distribution element (23) are assembled, directing the air through the two ducts (10) to the outlets (71, 72) of the blower head located on either side of the skid (15) fitted with its flat teeth (24). An example of the airflow exiting from the outlet on the right (72) along the skid (15) is shown here by arrows.

[0018] Figures 8 and 9 show a motorized version of the airflow direction control device located in the air distribution element (23) of the smoothing blower brush. The direction control device (2), pivoting on a bearing (5), still tilts with gravity but is now assisted by a motor (9) and electronically controlled by a device capable of detecting the direction of gravity, such as a gyroscope.

[0019] Figure 10 represents another exploded view of the air distribution element (23). It also shows the airflow direction device (2), this time in the form of a flap (202) movablely mounted on a pivot axis (16), itself mounted on an air distribution duct (14) at the inlet of the blower head, which here represents a part also enabling the assembly of the upper and lower shells (3,4) of the air distribution element.

[0020] Figure 11 represents a cross-section at the level of the air distribution duct (14) where the valve (202) variant (G) is oriented to allow the airflow to be directed towards the left air outlet (71) of the blower head and where in variant (H) the valve (202) is oriented to favor the air outlet (72) to the right of the blower head.

[0021] Figure 12 represents the use of the blowing and smoothing brush according to this disclosure, where it is held in an approximately horizontal position relative to gravity and where the airflow direction device is directed equally towards the two air outlets (71,72) at the edge of the blowing head.

[0022] Figure 13 illustrates the use of the blow-drying and smoothing brush according to this disclosure, where the airflow direction device 2 (spoon 201) has been tilted to the left and directs the airflow through the right duct of the element (23) from the opposite side towards the right edge of the blower head (72). The gray arrows represent the airflow.

[0023] Figure 14 shows in semi-transparency a rear view of the use of the blow-drying and smoothing brush according to this disclosure, where the airflow direction device (spoon 201) directs the airflow to the opposite side on the right edge of the blower head (72).

[0024] Figure 15 illustrates the use of the blow-drying and straightening brush according to this disclosure on a strand of hair positioned above the device, where the device is tilted to the right. Here, the airflow direction device directs the airflow towards the left edge (71) of the blow-drying head, on the side opposite the tilt of the airflow direction device (2).

[0025] Figure 16 illustrates the use of the blow-drying and straightening brush according to this disclosure on a strand of hair located below the device, where the device is tilted to the right. Here, the airflow direction device directs the airflow towards the left edge (72) of the blow-drying head, on the side opposite the tilt of the airflow direction device (2).

[0026] Figure 17 illustrates an alternative (unclaimed) operating mode of the blow-drying straightening brush. In this configuration, there is an airflow direction device (18) connected to the movable combs (19) of the device. The airflow direction device (18) is movably connected to the two movable outer combs (19) of the blow-drying head. It has two airflow passage windows (26) and slides to the right or left (see gray arrows) depending on the tension exerted by the strand of hair on the movable combs (19). In this configuration, the combs move the windows and direct the airflow to one of the two outlets (71, 72) located on the edge of the blow-drying head, on either side of the pad (15) heated by the airflow.

[0027] Figure 18 represents a cross-section of the blower head inlet, where the inclination of the movable combs (19) is generated by the tension on the strand of hair to be straightened and where the inclination of the movable combs (19) controls the movement of the window (26) directing the airflow to the left, to the right or to both edges at once.

[0028] Figure 19 illustrates the use of the blow-drying and straightening brush as described herein on a strand of hair positioned above the device, with the device tilted to the right. Here, the airflow direction device directs the airflow toward the left edge (71) of the blow-drying head, opposite the tilt of the airflow direction device (2). This direction is achieved by the tilting of the movable combs (19), which are inclined by the pulling force on the strand of hair (20) and are connected to the airflow diverter (18).

[0029] Figure 20 illustrates the use of the blow-drying and straightening brush as described herein on a strand of hair positioned below the device, where the device is tilted to the right. Here, the airflow direction device directs the airflow towards the left edge (72) of the blow-drying head, opposite the tilt of the airflow direction device (2). This direction is achieved by the tilting of the movable combs (19), which are inclined by the pulling force on the strand of hair (20) and are connected to the airflow diverter (18).

[0030] List of reference symbols 1: Smoothing blow-dry brush 2: Gravity-operated tilting airflow direction device 201: Spoon-shaped airflow direction device 202: Airflow direction device in the form of a flap 203: Airflow direction device in the form of a tilting spoon, powered by gravity and assisted by a motor 3: Upper shell of the air distribution element 4: Lower casing of the air distribution element 5: Bearing (possibly a ball bearing) allowing the rotation of the airflow direction device 6: Blow-drying head combs 71: Air outlet of the blower head located to the left of the pad heated by the airflow. 72: Air outlet of the blower head located to the right of the pad heated by the airflow. 8: Deflectors allowing the uniform distribution of the airflow in the airflow distribution element. 9: Motor driving the gravity-sensitive airflow direction device, electronically controlled, for example by gyroscopic effect 10: Ducts formed by the interlocking of the lower and upper shells of the air distribution element 11: Turbine (blower module) located in the handle of the smoothing blow brush 12: Air filter 13: Tip of the air ionizer to eliminate static electricity generated by friction on the hair strand 14: Airflow distribution duct supplying the airflow direction device 15: Metal pad heated by the airflow 16: Pivot axis for the airflow directing flap 17: Control Panel 18: Airflow diverter device with windows 19: Mobile combs connected to the switching device 20: Lock of hair 21: Upper casing of the smoothing blow brush housing 22: Lower casing of the smoothing blow brush housing 23: Airflow distribution element 24: Flat teeth 25: Heating element 26: Windows for airflow Detailed description of the invention

[0031] Most state-of-the-art blow dryers direct their airflow perpendicular to the hair strand. This generally results in non-smooth drying of the hair strands, which tend to move away from the brush and not align in the direction of brushing / straightening, thus requiring the use of both hands during the operation, one holding the strand and the other the blow dryer.

[0032] Another disadvantage of an airflow exiting perpendicularly to the strand of hair, when the latter is directed towards the skull, is that it heats not only the strand but also the skull, which is generally undesirable.

[0033] This document discloses a blow-drying straightening brush that automatically directs the airflow exiting the brush in the direction of straightening and ahead of it, almost tangentially to the hair strand. This effect is achieved by means of an airflow direction control device that operates simply by gravity, according to the orientation of the blow-drying straightening brush. The idea is to direct the airflow out on the opposite side to the side towards which gravity has tilted the airflow direction control device. For configurations where gravity alone is insufficient to tilt the airflow direction control device (for example, in cases of insufficient weight), the device can optionally be motorized and electronically assisted, for example, by a gyroscopic effect.

[0034] The present invention discloses a portable straightening blow brush with a flattened blow head comprising a fairly thin handle incorporating a means of generating an airflow, such as a high-speed rotating turbine (approximately 50,000 to 100,000 rpm), as well as a heating element, a control panel and an air filter, said handle being connected to a blow head comprising in particular two combs, as well as air outlets located on both edges of the blow head, on either side of a metal pad heated by the airflow generated by a turbine and a heating element.

[0035] The comb of the straightening brush according to the invention is positioned on a casing containing an airflow distribution element with two channels directing the airflow generated in the handle. This element directs the airflow to a first or second air outlet depending on the direction of gravity, and therefore the position of the straightening brush on the strand of hair. The key is to obtain a preferred air outlet upstream of the straightening direction (see Figures 15 and 16), in a direction approximately tangential to the strand of hair.

[0036] To produce this gravity-driven airflow direction effect, the brush incorporates, between the blower head inlet and the handle outlet, a movable airflow direction device mounted on a bearing or axle. This device tilts to one side or the other depending on the direction of gravity. The idea is to direct the airflow out on the side opposite the tilting of the direction device, always along the upper edge of the brush, which is oriented relative to gravity. This effect is what holds the hair against the brush and allows for one-handed operation.

[0037] The airflow direction control device can take several forms and is not limited to the representations in the figures in this document. The tilting of this device according to the direction of gravity can occur automatically and without any assistance, simply using the weight of the element itself. As mentioned above, it can also be motorized and electronically controlled by a so-called "gyroscopic" effect capable of detecting the direction of gravity.

[0038] In the horizontal position, the airflow direction device can remain in a neutral position, allowing air to exit through the two air outlets located on either side of the heated pad, perpendicular to the strand of hair being treated. In this configuration, straightening only works if the air outlets are directed downwards, for example, above the head.

[0039] Figures 17 to 20 depict an alternative (not claimed) to the blow-dry straightening brush that directs the airflow in a preferred direction without relying on gravity. This alternative is achieved by connecting a movable airflow direction-direction device (a diverter device) to movable, mounted combs. These combs tilt as the hair is brushed, and the friction force moves the diverter device to one side or the other, thus ensuring a preferred airflow before the hair strand is straightened.

[0040] This alternative mode can be defined as follows: portable smoothing blow brush 1 comprising a handle and a blower head connected to the handle, the handle comprising a blower module 11, the blower head comprising two air outlets (71; 72) and movable combs 19 located on either side of a heated pad 15, in use, by the airflow, said brush comprising a casing with an upper part 21 and a lower part 22, said casing comprising within it an airflow distribution element 23 with an upper shell 3 and a lower shell 4, the combination of which makes it possible to form two conduits 10 for conveying the airflow to the two air outlets (71; 72), said brush comprising between the inlet of the blower head and the outlet of the handle a movable orientation device (2;18) of the airflow connected with the movable teeth 19 tilting, in use, in the opposite direction to the brushing of the strand of hair 20 and allowing to automatically direct, in use, the airflow towards one of the two air outlets (71;72) located on the side of the tilting of the movable combs 19, upstream of the straightening and closest to the root of the strand of hair.;

Claims

DEMANDS 1. A portable smoothing blower brush (1) comprising a handle and a blower head connected to the handle, the handle comprising a blower module (11), the blower head comprising two air outlets (71, 72) located on either side of a heated pad (15) which, in use, is heated by the airflow, said brush comprising a casing with an upper part (21) and a lower part (22), said casing comprising within it an airflow distribution element (23) with an upper shell (3) and a lower shell (4), the combination of which forms two conduits (10) for conveying the airflow to the two air outlets (71, 72), said brush comprising, between the inlet of the blower head and the outlet of the handle, a movable airflow orientation device (2) capable of tilting according to the direction of gravity and allowing automatic orientation, in use,the airflow towards one of the two air outlets (71,72) located on the opposite side to the tilting of the mobile airflow orientation device (2), closest to the root of the hair strand.

2. Smoothing blow brush (1) according to claim 1, wherein the movable airflow orientation device (2) is formed by a spoon (201) mounted on a bearing (5) or by a flap (202) mounted on a pivot axis (16).

3. Smoothing blower brush according to claim 2, in which the bearing (5) is fixed to the upper shell (3) of the air distribution element (23).

4. Smoothing blower brush (1) according to claim 2, wherein the flap (202) movablely mounted on the pivot axis (16) is positioned in an airflow distribution duct (14), said airflow distribution duct (14) constituting a connecting piece enabling the assembly of the upper shell (3) and lower shell (4) of the air distribution element (23).

5. Smoothing blower brush (1) according to claim 1 in which the tilting of the movable orientation device (2) of the airflow according to the direction of gravity is assisted, in use, by a motor (9) and electronically controlled by gyroscopic effect.

6. A blow-drying straightening brush according to any one of the preceding claims, wherein the upper part of the casing (21) has an opening for a tip of an ionizer (13) for eliminating static electricity generated by straightening hair strands.

7. A blow-drying straightening brush according to any one of the preceding claims, wherein the pad (15) has a metallic surface equipped with combs (6) and flat teeth (24) for straightening hair strands.

8. Smoothing blow brush according to any one of the preceding claims, wherein the lower shell (4) has deflectors (8) allowing the uniform distribution of the airflow towards the air outlets (71,72) located on either side of the pad (15).

9. Hair drying and straightening accessory that can be attached by means of an adapter to an airflow generator, said accessory having peripheral air outlets (71, 72) located on either side of a pad (15), the accessory having within it an airflow distribution element (23) with an upper shell (3) and a lower shell (4), the combination of which makes it possible to form two airflow ducts (10), said accessory having a movable airflow orientation device (2) tilting according to gravity and allowing the airflow to be automatically directed, in use, towards the air outlet (71) or (72) located on the opposite side to the direction of tilting of the movable airflow orientation device (2) closest to the root of the hair strand.

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