EP3277349A1 - Universal safe spray head for a spray - Google Patents

Abstract

Spray head (1) for a sprayer of pharmaceutical, parapharmaceutical and/or cosmetic compositions, comprising a cylindrical cross-section base (2) having a trigger (3) for activating a distribution member of said sprayer, and a distribution spout (4) comprising a base (6) and an interchangeable end piece (7, 11) attached on said base, the distribution spout comprising a knee located on the joint between the base and the interchangeable end piece. Interchangeable end piece for said distribution head.

Description

 Spray head universal and safe for spray

The present invention relates to a spraying head for spray, and more particularly relates to the field of sprays for pharmaceutical or parapharmaceutical use, such as those used for the injection of products through the nasal, atrial, ocular or oral routes.

The product application for the mouth is more specifically intended for application on the gums and on interdental parts.

The sprays are used for suspending droplets of liquid, or even solid particles, stored in a pressure tank and which are released under the effect of a propellant. The document EP 1 568 417 recalls the characteristics of such sprays, also called sprays, which comprise a pressure vessel, a dispensing member such as a pump or a valve, and a dispensing head which must overcome the spraying member. distribution. The dispensing head is generally used to actuate the dispensing member, in the manner of a trigger, and to expel the composition through a dispensing orifice.

Existing sprays sold in pharmacy or parapharmacy require the use of a dispensing head configured for a specific use. The conformation of the distribution head must meet needs conditioned in particular by the morphology of the natural pathways, the nature of the mucous membranes and the age of the person who follows the treatment. Spraying via the nasal passages is usually carried out using a sprayer comprising dispensing heads compatible with use by the nose, as described in document EP 1 296 736. Such a dispensing head is poorly adapted. to oral spray.

Other sprays of the prior art intended for spraying a composition by the upper airways are equipped with a set of several dispensing heads, which can be provided with cannulas, each being compatible with either an application by the nasal cavities, or with an application by the mouth, with variants dimensioned either for a child use, or for adult use. The provision of several dispensing heads makes complicated the manufacture of the assembly and poses storage problems in the storage box which must contain the spray. For shaving or hair care the use of sprays is quite common, JP201000898 describes such a spray equipped with a removable nozzle in several parts. These nozzles developed in the context of hair care do not have a morphology compatible with the comfort of use sought in the applications covered by the present invention.

In order to overcome all or some of the drawbacks of the state of the art, the present invention relates to a spraying head for a spray of a pharmaceutical, parapharmaceutical and / or cosmetic composition comprising a base of cylindrical section comprising a trigger designed to actuate an organ distribution nozzle, and, a dispensing spout which extends on the cylindrical section base through which a sparse distribution channel opens out over said dispensing spout, the spout comprises a base and an interchangeable tip fixed on pedestal. The distribution channel communicates, at one end, with the interior of the cylindrical section base, and at the other end, with the ambient medium.

In the context of the invention, the term interchangeable tip must be understood as a removable tip and substitutable either by an identical tip or by a differently configured tip and intended to perform the same function for a younger or older person, or intended to fulfill another function (care of the nose, ears, eyes, throat, teeth ...).

Such a spray head is compatible with different uses for the application of upper airway treatment for children and adults. The interchangeable tip is advantageously composed of an elastic material. Such an elastic material makes positioning easy, the user can deform the tip by stretching it to put it in place or remove it on the part of the base where it is to be placed, the base of the dispensing spout preferably being made of a rigid medical plastic material. The elastic material in which the tip is composed is advantageously a medical rubber. Advantageously, different colors may be associated with the tip to allow immediate identification to a function that must be associated with it.

The dispensing spout further comprises a localized slope break on the junction between the base and the interchangeable tip. Such a break in slope gives a curvature to the dispensing spout for a better comfort of use during spraying. Indeed, the user is no longer bothered by his finger that presses the trigger to aim accurately towards the cavity (nostril, throat ...) or organ (eye ...) to be treated . In addition, the user has a relaxed posture due to the optimized ergonomics, which allows a more precise application and a finer dosage of the amount of substance to be sprayed. The term ergonomics used in the context of the invention describes the ideal conformation of the device encouraging the user to adopt a comfortable posture so that it is better with the dispensing nozzle and easily controls the dispersion of the product contained in the spray. A slope break preferably consists of a variation of angle between 25 and 45 degrees, including the terminal. The angle variation of the slope failure is advantageously 30 to 40 degrees, and ideally 35 degrees. The inventors have established, unexpectedly, that such a value makes it possible to aim towards the cavity or the organ to be treated with the greatest precision.

The conformation of the assembly with such a dispensing spout must facilitate the introduction and maintenance of a cover designed to fit on a fret of the sprayer carrying said head.

The interchangeable tip is advantageously maintained fixed on the base by adhesion. The adhesion between the materials of the base and the tip allows easy and secure mounting. The base advantageously comprises a groove and the endpiece an interlocking member to clip into the groove for a perfect adhesion by ensuring a mounting in which the tip remains in place on its base. Alternatively, the base comprises a screw thread, and the tip a thread, for a grip by screwing with an optimal fit. The tip can advantageously be fixed by wrapping on the base when it is composed of an elastic material, as seen above. Advantageously, the pedestal of the dispensing spout has a nipple at its end, and the dispensing spout comprises an elastic interchangeable tip provided for wrapping said nipple. The elastic tip should be adjusted to the nipple so that it is pinched.

The interchangeable tip is advantageously a spray nozzle. Advantageously, the spray nozzle is an auricular or nasal nozzle. A nasal nozzle is a nozzle configured for a nasal application, and it is advantageously a set without sharp edges consisting of a frustoconical piece and a nipple protruding at the top of the frustoconical piece, and through which opens a spray orifice. Advantageously, the nasal nozzle has a shape and dimensions that substantially correspond to the borrows of the nostrils of a lambda individual, with external dimensions chosen according to the age of the person. The nasal nozzle is advantageously made of a plastic material for medical use, the risks of allergy are therefore avoided. In order to take advantage of such a material, only the interchangeable tip must be machined in the medical material which simplifies the manufacture and limits the production costs directly related to the raw material.

The interchangeable tip is advantageously an oral spray cannula. Such a cannula comprises a dispensing tube and a dispensing nozzle attached to one end of the dispensing tube. The dispensing tube makes it possible to insert the nozzle deeply at the level of the zones to be treated, such as, for example, the larynx.

The trigger advantageously comprises a gripping member comprising a raised edge. The raised edge advantageously consists of a lip extending on a border of the aforesaid base of cylindrical section. Such trigger improves grip over the triggers of the prior art, and allows the user to control with greater dexterity the amount of liquid to be delivered. Precisely controlling the quantity of liquid to be sprayed ensures safety, since it is important that the dose of liquid spray corresponds as closely as prescribed to the patient - in the context of therapeutic compositions.

The present invention also relates to an interchangeable tip for a spray head as described above in the context of the invention. The interchangeable tip is preferably a spray nozzle or an oral spray cannula.

The present invention also relates to a spray of a pharmaceutical, parapharmaceutical and / or cosmetic composition, comprising a hoop, a spray head as described previously in the context of the present invention, and a tamper-evident pin connecting the hoop and the head. . A hoop consists of an annular piece which must be mounted on the top of the container at the periphery of the evacuation of the aforesaid dispenser member of the sprayer. The hoop is advantageously a plastic ring made of the same material as the tamper pins. The hoop is connected to the spray head by at least one tamper pin, and preferably at least three spikelets of the sprayer tamper. The tamper pins are plastic ties intended to be broken at the first use by actuation of the trigger of the spray head. The user is therefore certain that it is a first use, which provides security in this regard. The pins also allow centering of the spray head and better cooperation with the valve body of the sprayer, the safety in terms of preservation of the liquid and amount of liquids delivered is thereby improved.

The sprayer advantageously comprises a connecting member between the collar and the spray head, said member being a plastic link having a cross section whose surface is greater than the cross sectional area of the tamper pins. The integrity of such a connecting member remains perennial after rupture of the tamper pins during a first use, and fulfills the Lever arm to guarantee the volume to be delivered accurately, and to ensure user comfort for people with weaknesses in the hands - such as some elderly people - by allowing them to use the sprayer accurately. In this context, it is advantageous to have a spray head permanently connected to the sprayer, contaminations of the spray composition are in fact avoided because there is no possibility of withdrawal, then reassembly, the head on the sprayer: microbiological safety is ensured by such a molded and tamper-resistant spray head system. Other features and advantages of the invention will become apparent in the light of the detailed description which follows, made on the basis of the accompanying drawings. These exemplary embodiments are given for illustrative purposes only and should not be interpreted as limiting the scope of the legal protection conferred by the claims. The detailed description is to be read in conjunction with the appended drawings in which:

- Figure 1 shows a perspective view of an embodiment of a spray head according to the invention;

 - Figure 2 shows a perspective view of an interchangeable tip for equipping a spray head according to the invention and composed of a cannula for oral spray;

 FIG. 3 represents a perspective view of a part of an embodiment of a sprayer according to the invention comprising the spray head represented in FIG. 1;

 FIG. 4 represents an exploded view of the spray head according to the embodiment shown in FIG. 1;

 - Figure 5 shows a side view and sectional view of an embodiment of a spray head according to the invention for adult nasal application;

 - Figure 6 shows a side view and sectional view of an embodiment of a spray head according to the invention for a nasal child application;

- Figure 7 shows a side view and sectional view of an embodiment of a spray head according to the invention for an atrial application; - Figure 8 shows a side view and sectional view of an embodiment of a spray head according to the invention for oral application; and

 - Figure 9 shows a side view and sectional view of an embodiment of a spray head according to the invention for ocular application.

FIG. 1 shows a spray head 1 comprising, on the one hand, a base of cylindrical section 2 provided with a trigger 3 and, on the other hand, a dispensing spout 4. The trigger 3 ends laterally with an edge Raised 5, which can be very marked and then materializes a lip. The spout 4 is composed of a base 6 and an interchangeable tip 7, shown in Figures 1 and 3 for a nasal spray, and screwed on the base 6. A break in slope at the junction 8 between the base and the tip improves the comfort of use.

According to the embodiment shown in Figure 1, the interchangeable tip 7 consists of a frustoconical piece 9 and a nipple 10, which terminates at its top frustoconical piece 9. The interchangeable tip 7 is traversed in its center by a distribution channel of the dispensing nozzle 4, which channel opens into the environment through a spray orifice January 1. The outer diameter of the tip is chosen according to the dimensions of the nasal cavities, either for a child or for an adult. In Figure 2 the interchangeable tip is an oral spray cannula 17 comprising a dispensing tube 18 and a dispensing nozzle 19 molded on the tube 18. Depending on the use, it is possible to replace the nozzle interchangeable nasal spray, shown in Figures 1 and 3, by the oral spray cannula 17, which allows to treat all upper airways with a single spray without having to change or the entire spray head 1, or the whole spout distribution 4.

Figure 3 shows the spraying head 1 encased in a hoop 20 of a sprayer comprising a composition for washing a nasal cavity. The spray head 1 is connected to the hoop 20 by three tamper pins 21. At the first use, the user actuates the trigger 3 and breaks the pins 21, this which makes it possible to ensure that the product has never been used to guarantee the hygiene and the safety of said user. According to another embodiment the sprayer further includes a connecting member between the collar 20 and the spray head 1, this member is a plastic link with a cross section whose surface is greater than the cross-sectional area of the cross section. pips of inviolability 21. This connecting member is positioned substantially aligned with the interchangeable tip 7 (or the cannula 17) and performs a function of lever arm.

Figure 4 shows the spray head 1 with the dispensing spout 4 disassembled and on which the tip 7 is detached to reveal a teat 22 of the base 6 adapted to receive the interchangeable tip 7 made of a resilient medical material. The rest of the spray head 1, and in particular the base 6 is composed of a rigid medical plastic. Other embodiments are also possible to allow a wide variety of use. Figures 5 and 6 show examples of spray heads 1 having a nasal interchangeable tip for adult use 27, a nasal interchangeable tip for child use 37. Figure 5 shows a spray head 1 including the adult nasal tip 27 in profile on the right, and in longitudinal section on the left of the figure to make visible the inside of the device. The distribution spout 4 comprises the slope break at the junction 8, for these embodiments the base of the base 6 being substantially parallel to the axis of the base of the cylindrical section 2, the variation of the slope relative to said break in the slope can be represented by the angle α represented in FIGS. 5 to 9. The angle α is 35 °.

FIG. 7 shows, again in profile and in section, a spray head 1 identical to the embodiments for a nasal application illustrated in FIGS. 4 and 5, except that the nasal tips for adult 27 or for child 37, are substituted by an interchangeable ear tip 47. The specific conformation of this interchangeable ear tip 47, which comprises a flexible collar made of the same elastic material as the rest of the tip 47 and which comes out above the nipple 22, allows insertion easy and a good maintenance in the ear of the user. The slope break 8 at the junction between the base and the tip at the base of the pacifier 22 allows a more precise application and a finer dosage of the amount of substance to be sprayed in the ear.

FIG. 8 shows, again in profile and in section, a spray head 1 identical to that previously seen for the atrial application shown in FIG. 7, except that the ear tip 47 is replaced by an interchangeable tip for the throat 57. This tip for the throat 57 also has a flexible collar made of the same elastic material as the rest of the tip 57, but much more elongated than in the treatment of the ear to reach the back of the throat of the user. The slope break 8 allows a more precise application and a finer dosage of the amount of substance to be sprayed into the groove.

FIG. 9 shows, again in profile and in section, a spray head 1 identical to that previously seen for the treatment of the groove shown in FIG. 8, except that the end piece for the groove 57 is replaced by a interchangeable tip for the eye 67. The tip for the eye 67 also has a flexible collar made of the same elastic material as the rest of the tip 67; this collar flaring considerably to allow to receive an eye which must possibly bathe for at least a few seconds in a freshly sprayed liquid. The slope break 8 allows a more precise application and a finer dosage of the amount of substance to be sprayed in the eye.

Claims

Spray head (1) for pharmaceutical, parapharmaceutical and/or cosmetic composition sprayer comprising a cylindrical section base (2) having a trigger (3) intended to actuate a distribution member of said sprayer, and, a distribution nozzle (4) which extends on said base of cylindrical section (2) being crossed by a distribution channel provided opening onto said distribution nozzle (4), said dispensing spout (4) comprises a base (6) and an interchangeable tip (7, 17) fixed on the base (6), characterized in that the dispensing spout (4) includes a break in slope located on the junction (8) between the base (6) and the interchangeable end piece (7, 17). Spray head (1) according to claim 1, in which the break in slope consists of a variation in angle a of between 25 and 45 degrees. Spray head (1) according to one of claims 1 or 2, in which the interchangeable tip (7, 17) is held fixed to the base (6) by adhesion. Spray head (1) according to one of claims 1 to 3, in which the interchangeable tip (7) is a spray nozzle. 5. Spray head (1) according to one of claims 1 to 3, wherein the interchangeable tip is an oral spray cannula (17). 6. Spray head (1) according to one of claims 1 to 5, wherein the trigger (3) comprises a gripping member comprising a raised edge (5). 7. Interchangeable tip (7, 17) for a spray head (1) according to one of claims 1 to 6. 8. Interchangeable tip (7) according to claim 7, wherein the interchangeable tip (7) is a spray nozzle. 9. Interchangeable tip (17) according to claim 7, wherein the interchangeable tip is an oral spray cannula (17). 10. Sprayer of pharmaceutical, parapharmaceutical and/or cosmetic composition, comprising a hoop (20), a spray head (1) according to one of claims 1 to 6, and, a tamper-proof pin (21) connecting the hoop (20) and the spray head (1). 1 1 . Sprayer according to claim 10, comprising a connecting member between the hoop (20) and the spray head (1), said member being a plastic link having a straight section whose surface is greater than the surface of the straight section of the tamper-evident pins (21).