Anti-frit hair styling implement

Abstract

The present invention discloses an anti-frizz accessory intended to be attached to the blower end of a hair styling device, said accessory comprising a hollow body with an air inlet and an air outlet nozzle, said air outlet nozzle comprising a styling surface with a hair suction grid and an air outlet slot, said suction grid enabling, in use, the hair to be sucked up so that it sticks to the styling surface of the air outlet nozzle.

Description

Object of the invention

[0001] The present invention relates to an accessory for a hairdryer or blow dryer, more particularly an anti-frizz accessory that provides a finishing touch to hair straightening. It is intended to be attached to the outlet of a device capable of blowing hot air, such as a hairdryer or blow dryer. State of the art

[0002] There's a current trend to style hair to make it as smooth as possible. Most hair styling and straightening devices rely on the principle of passing strands of hair between two jaws containing heated plates. A recurring problem concerns the hair roots, which are more difficult to reach and grip between the two jaws. Furthermore, shorter hairs, such as roots or broken hairs, tend to resist movement and create frizz at the scalp. This contradicts the smooth look desired by the user. There is a real need to improve the straightening of hair close to the scalp, which is the most difficult to achieve with hair styling tools currently on the market.

[0003] Document WO2022162339A discloses a hairdryer attachment that straightens hair using the Coanda effect. To achieve this, the attachment includes an air inlet and outlet, but more specifically, a convex curved surface adjacent to and downstream of the air outlet. Providing this curved surface adjacent to and downstream of the air outlet generates a region of negative pressure that attracts hair towards this curved surface, according to the well-known Coanda effect.

[0004] Generally, hair straightening tools are designed to directly heat the hair at the roots. This type of treatment damages the hair due to the direct contact with hot air in the styling area. It is now important to protect and care for hair to avoid damage during styling, particularly by avoiding excessively high temperatures. Objectives of the invention

[0005] The present invention aims to overcome the drawbacks of the prior art, and in particular to provide a hair styling accessory offering a smoothing finish and an anti-frizz treatment, especially for hair close to the root.

[0006] One of the main objectives of the present invention is to provide a hair styling attachment suitable for use with a blow-drying device such as a hair dryer or a blow dryer, which simply draws in the hair. The hair is brought into contact with a heated styling surface, itself heated by an airflow, but is not within the hot airflow nor in direct contact with it. The specific geometry of the attachment of the present invention allows, via the Venturi effect, the creation of suction on the hair, which then comes into contact with the styling surface.

[0007] One aim of the present invention is to suction the hair at its root against the styling surface. By moving the attachment towards the ends of the hair, longer hairs will be attracted and held against the attachment, unlike shorter hairs. The styling surface will rearrange the hair, causing the longer hairs to lie on top of the shorter ones and conceal them, thus preventing a frizzy, unruly appearance near the user's scalp.

[0008] Another objective of the present invention is to provide a simple, easy-to-use, and easy-to-maintain accessory. Since a hair styling tool is a consumer product, its price must remain affordable.

[0009] Another aim of the invention is to offer a compact and lightweight solution so as not to add weight to the hair styling tool. It is essential that the device be easy to handle and allow for good flexibility for the user during styling movements. Summary of the invention

[0010] The present invention discloses an anti-frizz hair styling accessory intended to be attached to the blower end of a hair styling device, said accessory comprising a hollow body with an air inlet and an air outlet nozzle, said air outlet nozzle comprising a styling surface with a hair suction grid and an air outlet slot, said suction grid enabling, in use, the hair to be sucked up so that it sticks to the styling surface of the air outlet nozzle.

[0011] According to specific embodiments, the accessory of the invention comprises one or more of the following characteristics: The air outlet nozzle comprises an air acceleration channel delimited by an active wall including the shaping surface and a passive wall, said air acceleration channel comprising an air inlet slot; the air acceleration channel has a radius of curvature between 15° and 45°, preferably between 20° and 30°; the total area of ​​the suction grille openings is between 200 and 1200 mm², preferably between 600 and 900 mm²; the area of ​​the air inlet is between 1.5 and 4 times larger than the inlet slot, preferably between 2 and 3 times larger; the area of ​​the suction grille openings is larger on the distal side than on the proximal side of the accessory; the suction grid comprises a set of suction slots, the width of a slot being between 1 and 4 mm, preferably between 2 and 3 mm;The width of the suction slots varies and is greater on the distal side than on the proximal side of the accessory; the suction grid comprises a set of circular suction orifices; the cross-section of the air inlet of the hollow body is between 800 and 1200 cm² and the cross-section of the air inlet slot in the air outlet nozzle is between 100 and 350 cm²; the accessory includes a comb, removable or not.

[0012] The invention also relates to a hair dryer or a blow dryer comprising an anti-frizz styling accessory as described. Brief description of the figures

[0013] There figure 1 represents a three-dimensional perspective view of an example of a hair styling accessory according to the present invention, shown without a hairdryer. figure 2 represents a longitudinal section of the accessory of the figure 1 . There figure 3represents a view from below of an example of an accessory according to the present invention. figure 4 represents a longitudinal cross-sectional view of the accessory of the figure 1 . There figure 5 represents a perspective view of the accessory of the figure 1 This one being equipped with a comb. The figure 6 represents a perspective view of another example of an accessory according to the invention, with a suction grille having a different orifice geometry. figure 7 represents a perspective view of the accessory of the figure 1 attached to a hairdryer. List of reference symbols

[0014] 1: Anti-frizz attachment 2: Hollow body 3: Air outlet nozzle 4: Suction grille 5: Air inlet 6: Air outlet slot 7: Styling surface (active wall of the angled channel) 8: Passive wall of the angled channel 9: Air acceleration angled channel 10: Hair dryer 11: Air inlet slot in the angled channel 12: Comb Detailed description of the invention

[0015] An example of an anti-frizz accessory 1 according to the present invention is shown on the Figure 1 This is designed to be attached, in use, to the end of a blow dryer or hair dryer 10 as illustrated in the Figure 7 The accessory comprises two main parts: firstly, a hollow body 2 on the proximal side of the accessory, and secondly, an air outlet nozzle 3 on the distal side of the accessory. The hollow body allows the accessory to be attached to the blow dryer and includes an air inlet 5 which, during use, is positioned on the blower end of the blow dryer. The air outlet nozzle 3 is located at the end of the hollow body and allows for the styling of the hair.

[0016] More specifically, the air outlet nozzle includes a shaping surface 7, which the hair will come into contact with during use. As illustrated on the Figures 2 And 4The nozzle preferably includes an air acceleration channel 9, extending between an inlet slot 11 on the hollow body side and an air outlet slot 6 on the nozzle outlet side. This air acceleration channel is delimited by two walls, one active and the other passive 8, the active wall having its outer surface corresponding to the hair-shaping surface 7. In use, when the accessory is placed on the blow dryer, air first enters the hollow body through the air inlet. The airflow then passes through the air outlet nozzle, entering through the nozzle's air inlet slot and being expelled through the nozzle's air outlet slot. The air acceleration channel confines the air within the air outlet nozzle and accelerates the airflow within the accessory.

[0017] To attract hair to the styling surface, the device includes a suction grid 4. This suction grid is essential to the invention because, in use, it creates a peripheral suction flow around the accessory, moving the hair so that it adheres to the styling surface of the air outlet nozzle and is styled without being in direct contact with the main hot airflow. More specifically, the suction is generated by the Venturi effect, which creates a low-pressure area around the periphery of a main fluid to draw in an adjacent peripheral fluid. The main airflow, produced by the blower to which the accessory is attached, enters the hollow body and then the nozzle of the accessory.This main airflow then enters the acceleration channel and is accelerated, firstly by the reduction in cross-section between the hollow body's air inlet and the channel's air inlet slot, and secondly by a vacuum created within the channel due to its geometry. This vacuum in the channel generates suction at the periphery of the attachment, through the suction grid. A peripheral airflow is created outside the attachment, supplementing the main airflow within the channel. The suction of this peripheral airflow draws the hair strands towards the styling surface.

[0018] The suction grid can have any geometry. To ensure sufficient suction, it is recommended that the total surface area of ​​the suction grid openings be between 200 and 1200 mm², preferably between 600 and 900 mm². It can be advantageous to have a larger surface area of ​​the suction grid openings on the distal side of the accessory than on the proximal side (i.e., an increase in the number of openings towards the accessory outlet).

[0019] The air acceleration channel has a radius of curvature between 15° and 45°, preferably between 20° and 30°.

[0020] It is preferable that the cross-sectional area of ​​the air inlet in the hollow body be larger than the cross-sectional area of ​​the air inlet slot in the nozzle, particularly to create flow acceleration. Preferably, the cross-sectional area of ​​the air inlet is between 800 and 1200 cm², while the cross-sectional area of ​​the air inlet slot in the accelerating nozzle is between 100 and 350 cm², preferably between 150 and 250 cm². Preferably, the air inlet area is between 1.5 and 4 times larger than the inlet slot, preferably between 2 and 3 times larger. The air outlet area is also between 100 and 350 cm², preferably between 150 and 250 cm².

[0021] As shown in the examples of figures 1 to 5The grid can be formed from a series of slots. These slots preferably have a width between 1 and 3 mm and a length between 20 and 40 mm. It can be advantageous for the width of the suction slots to vary, and for the slots to be wider on the distal side than on the proximal side of the accessory. For example, the slot width could be 1 mm on the side of the air inlet to the nozzle and 3 mm on the side of the air outlet from the nozzle.

[0022] As shown in the example of the Figure 6 The grid can be formed from a series of suction segments. These segments preferably have a length between 3 and 12 mm, and more preferably between 5 and 10 mm. The suction grid could also be formed from several circular suction orifices. It may be advantageous for the diameter of the suction orifices to vary, and to be larger on the distal side than on the proximal side of the accessory.

[0023] The accessory can also be fitted with a 12-tooth comb as illustrated in the Figure 5 to detangle hair during straightening. The comb comprises a set of teeth located on the distal part of the attachment, downstream of the suction grille. The comb may be removable or fixed. Uses and benefits

[0024] Thanks to the Venturi effect, air is drawn in from the periphery of the hair, attracting it to the styling surface. When using the device, the user first places it at the roots and gradually moves it away. The peripheral airflow attracts all the hair, but only the longest strands remain in place as the device is moved further away. As a result, the longer hairs end up positioned above the shorter ones. This reorganizes the hair, leading to smoother hair and reduced frizz at the scalp.

[0025] Thanks to this new accessory using the Venturi effect, the hair is not in contact with the main, hot airflow. Only the peripheral airflow sets the hair in motion, which then comes into contact with the styling surface. This surface is heated by the main airflow flowing through the air acceleration channel. The hair is therefore protected by avoiding exposure to hot air. Furthermore, the hair does not disrupt the internal main airflow.

Claims

1. Anti-frizz accessory (1) intended to be attached to the blower end of a hair styling device, said accessory (1) comprising a hollow body (2) with an air inlet (5) and an air outlet nozzle (3), said air outlet nozzle (3) comprising a styling surface (7) with a hair suction grid (4) and an air outlet slot (6), said suction grid (4) enabling, in use, the hair to be sucked up so that it sticks to the styling surface (7) of the air outlet nozzle (3).

2. Accessory (1) according to any one of the preceding claims, characterized in that the air outlet nozzle (3) includes an air acceleration channel (9) delimited by an active wall comprising the shaping surface (7) and a passive wall (8), said air acceleration channel (9) including an air inlet slot (11).

3. Accessory (1) according to claim 1, in which the air acceleration channel has a radius of curvature between 15° and 45°, preferably between 20° and 30°.

4. Accessory (1) according to any one of the preceding claims, characterized in that The total surface area of ​​the suction grille openings (4) is between 200 and 1200mm 2 preferably between 600 and 900mm 2 .

5. Accessory (1) according to any one of the preceding claims, characterized in that the air inlet surface (5) is between 1.5 and 4 times larger than the inlet slot (11), preferably between 2 and 3 times larger.

6. Accessory (1) according to any one of the preceding claims, characterized in that the surface area of ​​the openings of the suction grid (4) is larger on the distal side than on the proximal side of the accessory (1).

7. Accessory (1) according to any one of the preceding claims, characterized in thatthe suction grid (4) comprises a set of suction slots, the width of a slot being between 1 and 4 mm, preferably between 2 and 3 mm.

8. Accessory (1) according to any one of the preceding claims, characterized in that the width of the suction slits varies and is greater on the distal side than on the proximal side of the accessory (1).

9. Accessory (1) according to any one of claims 1 to 6, characterized in that the suction grid (4) includes a set of circular suction orifices.

10. Accessory (1) according to any one of the preceding claims, characterized in that The cross-section of the air inlet (3) of the hollow body (2) is between 800 and 1200 cm² 2 and the cross-section of the air inlet slot in the air outlet nozzle (3) is between 100 and 350 cm 2 .

11. Accessory (1) according to any one of the preceding claims, characterized in that It includes a comb.

12. Hair dryer (10) comprising an accessory (1) according to any one of claims 1 to 11.

13. Blower brush comprising an accessory (1) according to any one of claims 1 to 11.

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