Diffuser device for cosmetic liquids for hair dryers

Abstract

Diffuser device for cosmetic liquids for hair dryers, characterized in that it comprises a cylindrical barrel, which can be associated with the blowing part of a hair dryer; said cylindrical barrel housing a diaphragm comprising a transverse septum which has a central expansion and lateral lobes; said lateral lobes defining respective lateral passages; said lateral passages and said transverse septum causing the air produced by said blowing part to pass in the form of two flows channeled to the exit of said device with laminar motion. The device makes passage of the air that passes through it more uniform in pressure and temperature, and at the same time enables cosmetic products to be dispensed for hair treatment.

Claims

1. A diffuser device for cosmetic liquids for hair dryers, comprising a cylindrical barrel (5, 105), which can be associated with a blowing part (3) of a hair dryer (10); said cylindrical barrel (5, 105) housing a diaphragm (6) comprising a transverse septum (7) which has a central expansion (8) and lateral lobes (9); said lateral lobes (9) having respective lateral passages (11); said central expansion (8) of said transverse septum (7) having a cavity (12) and being a front part provided with holes and slots (13); said central expansion (8) of said transverse septum (7) has' having a rear part (14) arranged opposite said front part and having a smooth non-perforated profile; said cavity (12) housing a pad (15) and being accessible via a hole (16) formed in said barrel (5, 105), and being adapted to be closed by a hermetic plug (17); said pad (15) being of textile material, which can be impregnated with cosmetic or perfuming liquids.

2. The device according to claim 1, characterized in that said hermetic plug (17) comprises a barbed stick (18) adapted to facilitate a removal of said pad (15) for replacement thereof.

3. The device according to claim 1, characterized in that said cylindrical barrel (5) has a female connection enabling said cylindrical barrel (5) to be attached to said blowing part (3) of said hair dryer (10); said cylindrical barrel (5) further comprising a male connection (19) to which an optional concentrator (4) may be connected.

4. The device according to claim 1, characterized in that said cylindrical barrel (105) is in one piece with a concentrator (104); said cylindrical barrel (105) having a female connection enabling said cylindrical barrel (105) to be attached to said blowing part (3) of said hair dryer (10).

5. The device according to claim 1, characterized in that said cylindrical barrel (5) is in one piece with said blowing part (3) of said hair dryer (10).

6. A hair dryer, characterized in that it comprises a diffuser device for cosmetic liquids according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further characteristics and advantages of the present invention will be more particularly apparent from an examination of the following detailed but not exclusive description of the preferred and not exclusive embodiments of the invention, illustrated by way of non-limitative example in the attached drawings, wherein:

(2) FIG. 1 is a side elevation view of a hair dryer fitted with the diffuser device according to the present invention;

(3) FIG. 2 is a side elevation view of a hair dryer fitted with the diffuser device according to a further aspect of the present invention;

(4) FIG. 3 is a perspective view of the device according to the present invention;

(5) FIG. 4 is a perspective view of the device of the present invention according to the embodiment illustrated in FIG. 2;

(6) FIG. 5 is a front perspective view of the diaphragm;

(7) FIG. 6 is a rear perspective view of the diaphragm;

(8) FIG. 7 is a partially exploded view of the device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(9) With particular reference to the numerical symbols of the aforesaid figures, the diffuser device for cosmetic liquids for hair dryers, according to the invention, indicated as a whole with the reference number 1, is particularly intended for a hair dryer 10 comprising a suction part 2 and a blowing part 3 to which an outlet air concentrator 4 can be applied in a manner which is in itself known.

(10) The device according to the invention comprises a cylindrical barrel 5, located at the outlet of the blowing part 3, which houses a diaphragm 6, in an intermediate position.

(11) The diaphragm 6 comprises a transverse septum 7 having a central expansion 8 and lateral lobes 9 defining respective lateral passages 11.

(12) The transverse septum 7 is a cylindrical body having a cavity 12 and provided with holes and slots 13 in the front part, i.e. facing the outlet mouth.

(13) On the other hand, the rear part 14 of the transverse septum 7 has a smooth non-perforated profile.

(14) The cavity 12 of the transverse septum 7 houses a pad 15 and is accessible via a hole 16 sealed by a hermetic plug 17.

(15) The pad 15 is made of a natural (cotton) or artificial (non-woven fabric) textile material, which can be impregnated with cosmetic or perfuming liquids contained in sealed packages provided for the purpose.

(16) The hermetic plug 17 can advantageously be fitted with a barbed stick 18 to facilitate removal of the pad 15 for replacement.

(17) According to one embodiment of the present invention, the cylindrical barrel 5 has a female connection which enables the cylindrical barrel 5 to be attached to the blowing part 3 of the hair dryer as an appendage, and a male connection 19 to which an optional concentrator 4 may be connected.

(18) According to this embodiment, the device 1 is of wide application, being able to operate with or without concentrators having different openings.

(19) Alternatively, according to a further embodiment illustrated in FIGS. 2 and 4, the diffuser device, indicated by the reference number 101, is incorporated in a concentrator 104 forming a single body with the cylindrical barrel 105.

(20) The cylindrical barrel 105 has a female connection through which the cylindrical barrel 105 can be attached to the blowing part 3 of the hair dryer 10.

(21) According to the present invention, the particular shape of the diaphragm 6 makes it possible to eliminate the Dean vortices enabling the output flow to maintain the longitudinal velocity and, with it the heat transported, almost uniform.

(22) In particular, the diaphragm 6, comprising the transverse septum 7 with expansion 8 in the center allows the air reaching it to divide on either side of it, passing along its surface.

(23) Dean's vortices are eliminated through the central expansion 8, in this case of cylindrical shape, and the lateral passages 11, whose edges 9 are of suitable shape, limited by the circumference of the containing barrel 5 and which together with the latter define a gradual narrowing and favor aerodynamic adaptation to the subsequent concentrator section proper.

(24) The air thus channeled, dividing, rejoins just downstream of the cylindrical cross-section, preventing Dean vortices from forming.

(25) This is well evidenced by the visualizations obtained using a thermographic camera, where the uniform distribution of heat is immediately observable.

(26) The cavity 12 of the transverse septum 7 houses the pad 15, soaked in cosmetic substance with possible alternative functional characteristics (smoothing, anti-frizz, perfuming, etc., etc.) which through the negative pressure of the air flow and the heat present can be diffused onto the hair being processed, through appropriate holes and slots 13 present in the front part, that is facing the air outlet mouth, from which it comes out.

(27) In this case, in addition to the advantage of a faster and more uniform styling operation, hairdressers are able to cover the hair being treated with the emitted substance evenly, in a simple way and also in a lower dose than a conventional sprayer or spray, bringing further savings.

(28) The cylindrical barrel 5 with female connection can be fitted to the blowing part 3 of the hair dryer 10 as an appendage, while the male connection 19 enables any concentrators of different width and shape to be connected.

(29) In this case the device is widely applicable, being able to operate with or without concentrators having different openings.

(30) Alternatively, the barrel 105 is in one piece with the concentrator 104 and has a female connection to the hair dryer 10.

(31) The diaphragm 6 located inside the barrel 5, 105, eliminates the vortices and enables the device to be used as a vacuum diffuser for cosmetic and perfuming products for hair.

(32) The outgoing air passes through the two separate lobes defined by respective lateral passages 11, separated by the transverse septum 7, which is suitably rounded to produce two flows channeled into the slot of the concentrator with laminar motion.

(33) The transverse septum 7 of diaphragm 6 has a cylindrical profile in the inlet part of the air flow to facilitate fluid dynamics, and adequate geometry and volume to contain the pad 15, which is cylindrical or of other suitable shape; holes or slots 13 enable part of the air flow to convey essences or cosmetic products towards the concentrator 4, 104, and therefore to the outlet.

(34) Advantageously, in the air inlet part, i.e. the rear part 14, the cross section of the transverse septum 7 has an ogival profile or any other profile suitable for creating conditions for harmoniously separating the air flow, so as to avoid the formation of vortices according to Dean and Nekrassov conditions.

(35) Advantageously, the device can be used without containing cosmetics to be dispersed, to eliminate the vortices, according to Dean and Nekrassov conditions.

(36) One advantage of the present invention is that the device may be constructed as a separate piece or incorporated into a concentrator, or even be incorporated into the body of the hair dryer.

(37) The device is manufactured using components of plastic or other materials including metals.

(38) It has been established in practice that this invention accomplishes the intended aim and objects.

(39) A device which has a connection for the front body of an electric hair dryer, at the air outlet, and a male connection for a concentrating nozzle (concentrator), to make the passage of the air passing through the device itself more uniform in pressure and temperature, and at the same time allowing the diffusion of cosmetic products for hair treatment, has in fact been provided.

(40) Of course, the materials used, as well as the dimensions, may be adapted to meet any needs.