阅读说明：本技术 用于分配流体的分配器 (Dispenser for dispensing a fluid ) 是由 L·卡尔他 A·科拉纳迪 于 2019-05-24 设计创作，主要内容包括：描述了一种用于分配流体的分配器(1),该分配器包括能旋拧在瓶子的颈部上的环形螺母(9),并且包括肩部(10)和从所述肩部(10)在高度上延伸的套环(12)。分配器(1)还包括分配头(14),该分配头(14)包括中央部分(15)、设计为分配容纳在瓶子中的流体的喷嘴(16)和保护裙部(17),该保护裙部延伸以容纳环形螺母(9)的套环(12)。保护裙部(17)靠近肩部(10)的周缘部分延伸,并且在其中防止流体分配的分配器(1)的闭合构造中,该保护裙部与肩部(10)之间具有安全距离(G)。分配头(14)包括圆柱形冠部(18),该圆柱形冠部成形为形成带齿轮廓(18a),并位于保护裙部(17)和中央部分(15)之间。环形螺母(9)的套环(12)包括具有纵向延伸部的夹持元件(13),并且带齿轮廓(18a)在闭合构造中与夹持元件(13)接合。带齿轮廓(18a)和夹持元件(13)成形为允许促进分配头(14)和环形螺母(9)沿用于闭合分配器(1)的方向(R1)往复旋转,并阻碍分配头(14)和环形螺母(9)沿用于打开分配器(1)的方向(R2)意外地往复旋转。(A dispenser (1) for dispensing a fluid is described, comprising a ring nut (9) that can be screwed onto the neck of a bottle, and comprising a shoulder (10) and a collar (12) extending in height from said shoulder (10). The dispenser (1) further comprises a dispensing head (14), the dispensing head (14) comprising a central portion (15), a nozzle (16) designed to dispense the fluid contained in the bottle, and a protective skirt (17) extending to accommodate the collar (12) of the ring nut (9). A protective skirt (17) extends close to a peripheral portion of the shoulder (10) and has a safety distance (G) from the shoulder (10) in a closed configuration of the dispenser (1) in which dispensing of the fluid is prevented. The dispensing head (14) comprises a cylindrical crown (18) shaped to form a toothed profile (18a) and located between the protective skirt (17) and the central portion (15). The collar (12) of the ring nut (9) comprises a gripping element (13) having a longitudinal extension, and the toothed profile (18a) engages with the gripping element (13) in the closed configuration. The toothed profile (18a) and the gripping element (13) are shaped so as to allow to facilitate the reciprocal rotation of the dispensing head (14) and the ring nut (9) in the direction (R1) for closing the dispenser (1) and to hinder the accidental reciprocal rotation of the dispensing head (14) and the ring nut (9) in the direction (R2) for opening the dispenser (1).)

1. A dispenser (1) for dispensing a fluid, comprising:

-a hollow containing body (2) insertable into a bottle and comprising an orifice (3) for sucking fluid from the bottle;

-a ring nut (9) that can be screwed on the neck of the bottle, comprising a shoulder (10) that covers a lip (2d) of the containment body (2) and is associated with said lip (2d), and a collar (12) that extends in height from said shoulder (10);

-a piston (6) slidable inside said containment body (2) between a raised position and a lowered position;

-a hollow rod (5) axially slidable inside the containment body (2) and associated below with the piston (6);

-a dispensing head (14) comprising a central portion (15) connected to the upper portion of the hollow stem (5) to activate the piston (6), a nozzle (16) designed to dispense the fluid contained in the bottle, and a protective skirt (17) extending to house the collar (12) of the ring nut (9);

-a retaining ring (7) integral with said containment body (2) and inserted inside it for guiding said hollow rod (5) during its travel inside said containment body (2);

it is characterized in that the preparation method is characterized in that,

-said dispensing head (14) comprises a cylindrical crown (18) shaped so as to form a toothed profile (18a) and located between said protective skirt (17) and said central portion (15);

-the collar (12) of the ring nut (9) comprises a clamping element (13) having a longitudinal extension; in a configuration for closing the dispenser (1) in which dispensing of fluid is prevented, the toothed profile (18a) engages with the gripping element (13);

wherein the toothed profile (18a) and the gripping element (13) are shaped so as to allow to facilitate a reciprocal rotation (1) of the dispensing head (14) and the ring nut (9) in a direction (R1) for closing the dispenser and to hinder an accidental reciprocal rotation of the dispensing head (14) and the ring nut (9) in a direction (R2) for opening the dispenser (1).

2. The dispenser (1) according to claim 1, wherein the toothed profile (18a) has a predetermined number of teeth (19) and wherein the collar (12) has a predetermined number of gripping elements (13) different from the number of teeth (19) and such that at least one gripping element (13) engages with the teeth (19).

3. Dispenser (1) according to claim 1 or 2, wherein said toothed profile (18a) and said gripping element (13) are shaped so as to obtain a contact angle allowing said facilitating of the reciprocal rotation of said dispensing head (14) and said ring nut (9) along a direction (R1) for closing said dispenser (1).

4. The dispenser (1) according to any one of the preceding claims, wherein the toothed profile (18a) has a predetermined number of teeth (19), said teeth (19) alternating with a plurality of recesses, said predetermined number of teeth (19) being offset with respect to a predetermined number of gripping elements (13).

5. A dispenser (1) according to claim 4, wherein the tooth (19) is defined by two sections, each section having an opposite inclination.

6. The dispenser (1) according to any one of the preceding claims, wherein the gripping element (13) is located in an upper portion (12a) of the collar (12) and forms a discontinuous surface.

7. The dispenser (1) according to any one of the preceding claims, wherein the gripping element (13) is shaped, in a portion facing the toothed profile (18a), with an asymmetrical profile (P) having a variable inclination.

8. The dispenser (1) according to claim 7, wherein the toothed profile (18a) faces the central portion (15) of the dispensing head (14).

9. The dispenser (1) according to claim 7 or 8, wherein the toothed profiles (18a) have teeth (19) which are inclined in their lower portion, and wherein the gripping elements (13) have a rounding in the upper portion facing the toothed profiles (18 a).

10. The dispenser (1) according to any one of claims 1 to 6, wherein the clamping element (13) is made in the form of a tab (20).

11. The dispenser (1) according to claim 10, wherein the tab (20) defines an acute angle with the horizontal edge of the upper portion (12a) of the collar (12) greater than 0 ° and less than 90 °.

12. The dispenser (1) according to claim 10 or 11, characterized in that said toothed profile (18a) has teeth (19) facing a lower portion of said dispensing head (14), such that said teeth (19) slide on respective tabs (20) so as to allow to facilitate a reciprocal rotation of said dispensing head (14) and said ring nut (9) along said closing direction (R1), or said teeth (19) are locked by respective tabs (20) such that said dispensing head (14) and said ring nut are accidentally reciprocally rotated along a direction (R2) opening said dispenser (1).

13. The dispenser (1) according to any one of the preceding claims, wherein the protective skirt (17) extends close to a peripheral portion of the shoulder (10) and has a safety distance (G) from the shoulder (10) in the closed configuration of the dispenser (1).

14. The dispenser (1) according to claim 13, wherein the protective skirt (17) has a length such as to ensure the safety distance (G) in the closed configuration of the dispenser (1).

15. Dispenser (1) according to claim 13 or 14, wherein the safety distance (G) of the protective skirt (17) from the shoulder is between 0.2mm and 0.8mm, preferably the safety distance (G) is 0.5 mm.

16. Dispenser (1) according to any one of the preceding claims, wherein the diameter of the protective skirt (17) is dimensioned close to the diameter of the extension of the shoulder (10).

Technical Field

The present invention relates to a dispenser for dispensing a fluid, i.e. a dispensing device applicable to the neck of a bottle for dispensing a fluid contained in the bottle.

Background

As is well known, dispensers are commonly used to dispense liquids, such as soap (or other products not specifically mentioned below).

The liquid is contained in a bottle to which the dispenser is associated by means of suitable connecting means.

Dispensers on the market comprise an internal mechanism that allows the dispenser to be locked when it is in a non-operational state. In particular, known mechanisms comprise a control by means of rotation to close the dispensing head (or nozzle). The activation of the locking mechanism described above makes it possible to avoid undesired activation that may happen accidentally.

It is known that these locking mechanisms can be activated when the dispensing head (or nozzle) of the dispenser is in the raised rest position or when the dispensing head (or nozzle) is at the lowered end of the stroke position, respectively.

Dispensers having a mechanism activated by the dispensing head (or nozzle) in the raised position are known as "upper lock dispensers" and offer the possibility of reclosing the dispenser without activating it after each use, thus being forced to dispense liquid (which would therefore be wasted).

Dispensers having a mechanism activated by the dispensing head (or nozzle) in the lowered end of the stroke position are known as "lower lock dispensers" and provide a reduced size for the dispenser in a step prior to use by the user. In other words, the dispenser has a reduced size when packaged for transport.

There are also mechanisms that allow the dispenser to be locked in both positions.

The prior art dispensers have basic requirements such as accuracy and repeatability of the volume of liquid dispensed, or other ergonomic or mechanical type requirements.

Prior art dispensers having these mechanisms need to ensure sealing of the package, particularly when in a locked position.

Furthermore, the mechanisms of the prior art need to withstand mechanical stresses, such as applied loads or impacts, which may occur during transport or during use of the package with which the dispenser is associated.

These requirements have recently become of particular importance, depending on the size and weight of the package, and due to the transport and distribution conditions. In particular, with the growth of the electronic commerce sector, it has become necessary that these dispensers are in any case easy to carry.

Disadvantageously, the dispensers of the prior art are unable to withstand the loads exerted by other external objects coming into contact with them during transport, or do not have the features required to withstand the impact in the event of a fall.

For this reason, prior art dispenser technologies are not suitable for safe transport because they cannot withstand critical conditions such as those associated with dropping and/or flattening, thereby negating the above requirements. In other words, the dispensers of the prior art are not able to withstand high mechanical stresses, resulting in involuntary breakage and/or unlocking and therefore loss of the product contained in the bottle.

Disclosure of Invention

It is therefore a technical object of the present invention to provide a dispenser for dispensing a fluid which overcomes the disadvantages of the prior art.

It is an object of the present invention to provide a dispenser for dispensing a fluid, which dispenser is particularly resistant to high mechanical stresses.

Another object of the present invention is to provide a dispenser for dispensing a fluid which avoids accidental opening of the dispenser even under very difficult transport conditions.

It is another object of the present invention to provide a dispenser for dispensing a fluid, the exterior components of which are resistant to impact.

It is therefore an object of the present invention to provide a dispenser for dispensing a fluid, the outer parts of which prevent the transmission of impact energy to the inner parts of the dispenser.

The technical purpose illustrated and the aims specified are substantially achieved by a dispensing gas for dispensing a fluid, comprising the technical features described in one or more of the appended claims. The dependent claims can correspond to possible embodiments of the invention.

The invention describes a dispenser for dispensing a fluid, comprising a hollow containing body insertable in a bottle and comprising an orifice for sucking the fluid from the bottle.

According to an aspect of the invention, the dispenser comprises a ring nut able to be screwed onto the neck of the bottle, the ring nut comprising a shoulder covering and associated with the lip of the containment body and a collar extending in height from the shoulder.

Preferably, the dispenser comprises a piston slidable inside the containment body between a raised position and a lowered position.

Preferably, the dispenser comprises a hollow stem axially slidable inside the containment body and associated below the piston.

According to an aspect of the invention, the dispenser comprises a dispensing head comprising a central portion connected to the upper portion of the hollow stem to control the activation of the piston, a nozzle designed for dispensing the fluid contained in the bottle, and a protective skirt extending to accommodate the collar of the ring nut.

Preferably, the dispenser comprises a retaining ring integral with the containment body and inserted inside it for guiding the rod during its travel inside the containment body.

Preferably, the retaining ring has an upper portion surrounded by a collar.

According to an aspect of the invention, the protective skirt extends adjacent a peripheral portion of the shoulder and, in a closed configuration of the dispenser in which dispensing of fluid is prevented, is at a safe distance from the shoulder.

Advantageously, this feature makes it possible to prevent excessive deformation of the ring nut or other internal component in the event of accidental impacts of the dispenser, which could lead to breakage thereof.

According to another aspect of the invention, the dispensing head comprises a cylindrical crown shaped to form the toothed profile and located between the protective skirt and the central portion.

According to an aspect of the invention, the collar of the ring nut comprises a gripping element, even more preferably said gripping element has a longitudinal extension.

Preferably, the toothed profile engages with the clamping element in the closed configuration.

Preferably, the toothed profile and the gripping element are shaped so as to allow to facilitate the reciprocal rotation of the dispensing head and the ring nut in the closing direction of the dispenser.

Preferably, the toothed profile and the gripping element are shaped so as to hinder an accidental reciprocal rotation of the dispensing head and the ring nut in the opening direction of the dispenser.

Advantageously, these features make it possible to prevent accidental opening of the dispenser and therefore to prevent undesired loss of the fluid contained in the bottle.

Preferably, the toothed profile has a predetermined number of teeth and the collar has a predetermined number of gripping elements different from the number of teeth and such that at least one gripping element engages with a tooth.

Preferably, the toothed profile and the gripping elements are shaped so as to obtain a contact angle, to allow to facilitate the reciprocal rotation of the dispensing head and the ring nut along the dispenser closing direction.

Preferably, the toothed profile has a predetermined number of teeth alternating with the same number of recesses. Even more preferably, the predetermined number of teeth is offset relative to the predetermined number of gripping elements.

Preferably, the tooth is formed of two sections, each section having an opposite inclination.

Preferably, the gripping elements are located in an upper portion of the collar and define a discontinuous surface.

Preferably, according to an aspect of the invention, the clamping element is shaped, in an even more preferably portion facing the toothed profile, with an asymmetric profile with variable inclination.

Preferably, the toothed profile is directed towards a central portion of the dispensing head.

Preferably, the toothed profile has inclined teeth in a lower portion thereof, and the longitudinal member has a radius in an upper portion facing the toothed profile.

Preferably, according to one aspect of the invention, the clamping element is made in the form of a tab.

Preferably, the tabs define an acute angle with the horizontal edge of the upper portion of the collar that is greater than 0 ° and less than 90 °.

Preferably, the toothed profile has teeth facing the lower portion of the dispensing head, so that the teeth slide on the respective tabs to allow to facilitate the reciprocal rotation of the dispensing head and the ring nut in the closing direction.

Preferably, the toothed profile has teeth facing the lower portion of the dispensing head, so that the teeth are locked by the respective tabs so as to hinder accidental reciprocal rotation of the dispensing head and the ring nut in the opening direction of the dispenser.

Preferably, the diameter of the protective skirt is dimensioned close to the diameter of the extension of the shoulder.

Preferably, the protective skirt has a length such as to ensure said safety distance in the closed configuration of the dispenser.

Preferably, the safety distance of the protective skirt from the shoulder is between 0.2mm and 0.8mm, even more preferably the safety distance is 0.5 mm.

Other features and advantages of the present invention will become more apparent in the following non-limiting description of a preferred, non-exclusive embodiment of a dispenser for dispensing a fluid.

Drawings

The description is set forth below with reference to the attached drawings, which are provided for illustration purposes only and do not limit the scope of the invention, and in which:

figure 1 is a schematic view of a dispenser according to the invention;

figures 2a to 2c and 3a to 3e are schematic views of a first embodiment of a first and a second part, respectively, of a dispenser according to the invention;

figures 4a and 4b are schematic views of a first part and a second part of a dispenser according to a general embodiment;

figures 5a-5c and 6a-6d are schematic views of a second embodiment of the first and second parts of the dispenser according to the invention.

Detailed Description

With reference to the figures, the numeral 1 denotes as a whole a dispenser for dispensing a fluid, which for the sake of simplicity of description will be referred to hereinafter as dispenser 1.

The dispenser 1 comprises a containment body 2 shown in figure 1. The containing body 2 is hollow and can be inserted into a bottle. The containment body 2 is preferably of axisymmetric shape and comprises a top portion 2a and a bottom portion 2 b.

The top portion 2a of the containing body 2 is open and allows the insertion of the components constituting the dispenser 1 into the hollow body 2.

In the bottom portion 2b, the hollow body 2 comprises an orifice 3 for sucking fluid from the bottle. In other words, the liquid contained in the bottle enters the containing body 2 through the orifice 3.

Suitably located in the bottom part 2b is a valve 4, which valve 4 opens and closes an aperture in a manner which will be described in more detail below.

The hollow body 2 also has a central portion 2c forming a dispensing chamber.

Preferably, but not necessarily, the containing body 2 has a substantially funnel-shaped geometry.

Preferably, the three portions 2a, 2b and 2c differ in their transverse dimensions so as to define the above-mentioned funnel-shaped configuration of the containing body 2.

The dispenser 1 further comprises a hollow stem 5, the hollow stem 5 being axially slidable inside the containment body 2 between a raised position and a lowered position. The lowered part is shown in fig. 1.

The hollow rod 5 is designed to transfer the liquid present through its cavity to the inside of the dispensing chamber. More specifically, the hollow rod comprises at least one window 5a (preferably, it comprises two windows, even more preferably opposite each other). The window 5a is configured to selectively place the cavity of the hollow rod 5 in fluid communication with the interior of the containing body 2, in particular with the distribution chamber of the central portion 2 c. Preferably, but not necessarily, the window 5a (or windows 5a) is made on the side wall of the hollow rod 5.

Preferably, but not necessarily, the end portion of the hollow stem 5 is closed, so that the liquid in the dispensing chamber can only enter the cavity of the stem through the window 5 a.

The dispenser 1 further comprises a piston 6 slidable inside the containment body 2 between a raised position and a lowered position (fig. 1 shows the lowered position). The hollow rod 5 is in fact associated with the piston 6 and is configured for controlling the activation. In other words, the piston 6 is associated below with a hollow rod 5, which hollow rod 5 is configured to move the piston 6 inside a distribution chamber defined in the central portion 2c of the containing body 2.

The piston 6 comprises an outer surface designed to come into contact with the inner wall of the dispensing chamber of the containing body 2.

The piston 6 slides between the above-mentioned raised position, in which the volume of the dispensing chamber is at its maximum, and the above-mentioned lowered position, in which the volume of the dispensing chamber is at its minimum.

The piston 6 slides along the inner wall of the containment body 2 by means of a fluid-tight seal.

The hollow rod 5 is at least partially slidable with respect to the piston 6, so that the window 5a is blocked or released by the piston 6.

When the piston 6 creates an overpressure inside the dispensing chamber, the cavity of the hollow rod 5 is in fluid communication with the dispensing chamber, and the fluid in the dispensing chamber rises up the hollow rod 5.

According to this configuration, the valve 4 is lowered and blocks the above-mentioned orifice 3 due to the overpressure in the dispensing chamber.

When the piston 6 generates a negative pressure inside the dispensing chamber, the cavity of the hollow rod 5 is not in fluid communication with the dispensing chamber and the fluid is sucked from the bottle into the dispensing chamber of the containing body 2.

In this configuration, the valve 4 rises due to the negative pressure in the dispensing chamber, causing the above-mentioned orifice 3 to open.

According to the dispenser 1 described in the present invention, the sliding of the piston 6 inside the containment body 2 occurs by acting against a spring 8, this spring 8 being housed inside a seat defined by the stem 5, the purpose of which is to place the piston 6 in the raised position.

The dispenser 1 further comprises a retaining ring 7 integral with the containment body 2 and inserted inside it. In particular, the retaining ring 7 is inserted into the top portion 2 a.

The retaining ring 7 is configured for guiding the movement of the hollow rod 5 inside the containment body 2. In other words, the retaining ring is configured for guiding the hollow rod 5 between the raised position and the lowered position. Preferably, but not necessarily, the retaining ring 7 has an upper portion 7a, which upper portion 7a extends in height from the section for inserting the retaining ring 7 into the containing body 2. The upper portion 7a may be made integrally with the body of the retaining ring 7, or may be made by means of a tube separate from but associated with the body.

Preferably, but not necessarily, the retaining ring 7 defines the upper limit of the dispensing chamber. This upper limit prevents the piston from coming out of the dispensing chamber of the containing body 2.

The dispenser 1 according to the invention also comprises a ring nut 9 that can be screwed onto the neck of the bottle. The ring nut 9 shown in the figures is, without limiting the scope of the invention, a threaded connection equipped with a corresponding thread 9a to hold and constrain the containment body 2 inside the bottle.

Preferably, the ring nut 9 can be screwed to the bottle by means of a connecting device, such as a snap-fit device.

The ring nut 9 comprises a shoulder 10 covering the containment body 2. In particular, the shoulder 10 is associated with the lip 2d of the containment body 2 and covers the lip 2d of the containment body 2. Preferably, but not necessarily, the lip 2d has an annular shape.

The lip 2d of the containment body 2 is located on the top portion 2a of the containment body 2 and surrounds its upper opening (where the retaining ring 7 is inserted).

Preferably, the shoulder 10 of the ring nut 9 is made in the form of a flange.

The shoulder 10 rests on the top surface of the lip 2d and presses it against the edge of the neck of the bottle. In order to prevent the liquid present in the bottle from accidentally coming out, the gasket 11 is located between the lip 2d and the edge of the bottle.

Preferably, but not necessarily, the shoulder 10 of the ring nut 9 is sealingly connected to the retaining ring 7 by means of an opposite lip 10a, which opposite lip 10a is preferably annular. Preferably, but not necessarily, the lip 10a is connected to the retaining ring 7 using the upper portion 7a of the retaining ring 7.

The ring nut 9 further comprises a collar 12 extending in height from the shoulder.

Preferably, but not necessarily, the collar 12 may be made integral with the shoulder 10.

Alternatively, if the shoulder 10 is made in the form of a flange, the collar 12 is connected by means of a flange to the body of the ring nut 9, the ring nut 9 being equipped with connection means, such as preferably a thread 9 a.

The collar 12 extends so as to retain the upper portion 7a of the ring 7 around it. Preferably, the collar 12 extends for the entire height of the upper portion 7a of the retaining ring 7, so as to prevent that falling water may enter inside the dispenser 1.

According to an aspect of the invention, the collar 12 comprises a gripping element 13 having a longitudinal extension. It should be noted that the figures generally refer to the clamping elements 13, but the same reference numerals also refer to the single clamping elements 13. The clamping element 13 extends in length in the direction of extension of the collar 12, which collar 12 is elevated from the shoulder 10. In other words, the clamping element 13 extends longitudinally (according to the longitudinal extension direction of the collar 12).

Preferably, the gripping element 13 is located in the upper portion 12a of the collar 12. Preferably, but not necessarily, the gripping element 13 defines a discontinuous surface on the upper portion 12a of the collar 12.

The dispenser 1 further comprises a dispensing head 14, the dispensing head 14 being configured to control the operation of the hollow rod 5 and, therefore, the piston 6. The dispensing head 14 comprises a central portion 15 connected to the upper portion of the hollow stem 5. The central portion 15 is placed in fluid communication with the hollow stem 5 for dispensing the liquid contained in the bottle into the external environment.

The dispensing head 14 also includes a nozzle 16, the nozzle 16 being designed to dispense fluid contained in a bottle. In other words, the nozzle 16 is placed in fluid communication with the central portion 15, which central portion 15 is in turn in fluid communication with the hollow stem 5, so as to dispense the fluid contained in the bottle when the user presses the dispensing head 14.

The dispensing head 14 also comprises a protective skirt 17, which protective skirt 17 extends so as to house the collar 12 of the ring nut 9. In particular, the protective skirt 17 has a predetermined distance from the collar 12 of the ring nut 9. The distance should be such that the protective skirt does not directly surround the collar 12.

According to an advantageous aspect of the invention, the protective skirt 17 extends close to the peripheral portion of the shoulder 10. In particular, in the closed configuration of the dispenser 1 (shown in the figures) in which dispensing of the fluid is prevented and in which the dispenser 1 is advantageously suitable for transport, the protective skirt 17 has a safety distance "G" from the shoulder 10.

As shown in the figures, and in particular in fig. 4a and 4b, the diameter of the protective skirt 17 preferably has a dimension close to the extension diameter of the shoulder 10. Even more preferably, the diameter of the protective skirt 17 has an extension equal to the extension of the diameter of the shoulder 10.

Preferably, the protective skirt 17 has a length such as to ensure a safety distance "G" in the closed configuration of the dispenser 1. In other words, the protective skirt 17 has a length such that, except for the safety distance "G", the protective skirt 17 completely covers and surrounds the collar 12 of the ring nut 9. In other words, the protective skirt 17 and the collar 12 can be superposed by reciprocal sliding (after the user activates the dispenser 1 by pressure of the dispensing head 14).

Advantageously, the extension of the protective skirt 17 allows to protect the internal components of the dispenser 1 and to prevent, both in the closed condition suitable for transport and in the open configuration suitable for use of the dispenser 1, water from possibly entering the bottle containing the fluid to be dispensed.

Preferably, but not necessarily, the safety distance "G" of the protective skirt 17 from the shoulder 10 is between 0.2mm and 0.8 mm. Even more preferably, the safety distance "G" is 0.5 mm.

Advantageously, in the event of accidental impact of the dispenser 1 (in the event of the dispenser falling from the box during transport), the safety distance "G" of the protective skirt 17 from the shoulder 10 enables immediate contact of the protective skirt 17 with the shoulder 10, so as to prevent excessive deformation of the ring nuts 9 or other internal components of the dispenser 1 that could damage them.

In this way, the dispenser 1 is advantageously impact resistant, so that forces affect the internal components less.

The dispensing head 14 also comprises a cylindrical ring 18 shaped according to a toothed profile 18 a. A cylindrical crown 18 is located between the protective skirt 17 and the central portion 15.

According to an advantageous aspect of the invention, the toothed profile 18a engages with the gripping element 13 in the closed configuration (in the figures, this gripping element 13 is preferred but not limiting to the invention, shown in the lowered position of the dispensing head 14).

Preferably, the toothed profile 18a has a predetermined number of teeth 19 and the collar 12 has a predetermined number of gripping elements 13 different from the number of teeth 19. The number of teeth 19 and the number of gripping elements 13 are such that at least one gripping element 13 engages with a tooth 19.

In other words, the number of teeth 19 and the number of gripping elements 13 deviate from each other, thereby adjusting the intensity of the force exchanged. Preferably, but not necessarily, the number of teeth 19 and the number of gripping elements 13 are such that they cannot be separated from each other. In other words, the number of teeth 19 corresponds to the number of gripping elements 13, the number of gripping elements 13 being at least one greater than the number of teeth 19 (and vice versa).

Preferably, but not necessarily, the toothed profile 18a has a number of teeth 19a, these teeth 19a alternating with as many recesses. Preferably, the recess may have a horizontal profile, as is preferably shown in the figures.

Preferably, the tooth 19 is formed by two segments, each having an opposite inclination. Preferably, but not necessarily, the inclination of each stretch is different in order to obtain an irregular profile.

According to an advantageous aspect of the invention, the toothed profile 18a and the gripping element 13 are shaped so as to allow to facilitate the reciprocal rotation of the dispensing head 14 and the ring nut 9 along the closing direction "R1" of the dispenser 1. Fig. 3d shows the rotation of the dispensing head 14 with respect to the ring nut 9 in the counter-clockwise closing direction "R1".

According to another advantageous aspect of the invention, the toothed profile 18a and the gripping element 13 are shaped so as to hinder an accidental reciprocal rotation of the dispensing head 14 and the ring nut 9 along the opening direction "R2" of the dispenser 1. Fig. 3e shows the rotation of the dispensing head 14 with respect to the ring nut 9 in the clockwise opening direction "R2".

Preferably, the closing direction "R1" or the opening direction "R2" can be reversed (and the toothed profile 18a and the gripping element 13 shaped accordingly), but for the sake of simplicity of description they will be considered as shown in the drawings.

For example, the closing direction "R1" is represented as a counterclockwise direction, but may also extend in a clockwise direction. Similarly, the opening direction "R2" is shown as clockwise, but may also extend in a counterclockwise direction.

In other words, the shape of the toothed profile 18a and of the gripping element 13 is such as to prevent accidental opening thereof when the dispenser 1 is in the closed condition. In this way, the toothed profile 18a and the gripping element 13 ensure that the impact caused by a fall or other similar event does not accidentally open the dispenser 1, unless the user wishes to open the dispenser 1.

Preferably, the toothed profile 18a and the gripping element 13 are shaped so as to obtain a contact angle allowing to facilitate the reciprocal rotation of the dispensing head 14 and the ring nut 9 along the closing direction of the dispenser 1. The term "contact angle" is used to mean the angle at which the toothed profile 18a and the gripping element 13 extend relative to a horizontal plane (e.g., the recess described above).

Advantageously, the geometry of the gripping element 13 and of the toothed profile 18a is made such that the torque required to allow reciprocal rotation between the dispensing head 14 and the ring nut 9 in the opening direction "R2" is high enough to prevent accidental opening of the dispensing apparatus 1.

Advantageously, the geometry of the gripping element 13 and of the toothed profile 18a is made such that the torque required to allow reciprocal rotation between the dispensing head 14 and the ring nut 9 in the closing direction "R1" is sufficiently low to allow sliding rotation. In this way, the dispenser 1 can be easily screwed onto the bottle while keeping the nozzle of the dispenser in a predetermined position.

According to a first preferred but non-limiting embodiment of the invention, the gripping element 13 is shaped with an asymmetrical profile "P", the inclination of which is variable, as shown in fig. 2a-2 c. An asymmetric profile "P" is defined in the portion facing the toothed profile 18 a.

Preferably, but not necessarily, the teeth 19 of the toothed profile 18a are shaped so as to have two stretches with an inclination angle so as to define a saw-tooth profile, as shown in the accompanying figures.

Preferably, but not necessarily, the toothed profile 18a is directed towards the central portion 15 of the dispensing head 14. In other words, the toothed profile 18a has teeth 19, the teeth 19 extending towards the central portion 15 of the dispensing head 14, as shown in fig. 3a-3 e.

In other words, the asymmetric profile "P" extends away from the central portion 15 of the dispensing head 14 so as to engage the teeth 19 of the toothed profile 18 a.

In view of this, the diameter of the collar 12 is slightly smaller than the diameter of the cylindrical crown 18 defined by the toothed profile 18a, allowing engagement between the asymmetrical profile "P" of the gripping element 13 and the teeth 19.

Preferably, other configurations are possible, such as a toothed profile 18a oriented towards the bottle and a gripping element having an asymmetric profile "P" extending away from the upper portion 12a of the collar 12. In this case, the collar 12 needs to have a diameter larger than that of the collar 12.

Preferably, the asymmetric profile "P" shown in the figures has at least two sections with variable inclination, in order to operate in conjunction with the teeth 19 of the toothed profile 18 a.

This configuration of the teeth 19 and of the gripping elements 13 makes the radial component of the reciprocating force of contact predominate during the reciprocal rotation of the dispensing head 14 and of the ring nut 9 in the closing direction "R1".

Alternatively, this configuration of the teeth 19 and of the gripping element 13 is such that during the reciprocal rotation in the opening direction "R2", the tangential component of the contact force prevails, which determines the need for a high torque (which can be applied by the user) to obtain the opening of the dispenser 1.

The asymmetric profile "P" also allows to obtain a grip element 13 sufficiently flexible in the radial direction.

Preferably, but not necessarily, the teeth 19 shown in the figures have an inclination in their lower portion facing the bottle. Similarly, the asymmetric profile "P" shown in the drawings is rounded at its upper edge. In this way, it is possible to avoid collisions between the gripping element 13 and the tooth 19 during the assembly step, which gripping element 13 and tooth 19 will be superposed as they are in phase with each other.

Figures 5a-5c and 6a-6d show a second preferred (non-limiting) embodiment of the invention. Preferably, according to said embodiment, the diameter used to define the collar 12 is greater than that of the previous embodiment, so that the gripping elements 13 can work with the toothed profile 18a made on the cylindrical crown 18.

According to said second embodiment, the clamping element 13 is made in the form of a tab 20. The figures show four tabs positioned symmetrically with respect to each other. Preferably, other embodiments are possible, as long as a phase shift is maintained between the gripping element 13 and the teeth 19.

Preferably, the tabs 20 define an acute angle with the horizontal edge of the upper portion 12a of the collar as shown in the drawings. In other words, the tabs 20 extend at an angle greater than 0 ° and less than 90 ° according to the longitudinal direction of extension of the collar 12.

Preferably, the toothed profile 18a has teeth 19 directed towards the lower portion of the dispensing head 14. In other words, the teeth 19 are directed towards the bottle containing the fluid.

In this way, the teeth 19 slide on the respective tabs 20, so as to allow to facilitate the reciprocal rotation of the dispensing head 14 and of the ring nut 9 along the closing direction "R1" of the dispenser 1.

Moreover, this configuration allows the teeth 19 to be locked by the respective tabs 20 to hinder any accidental reciprocal rotation of the dispensing head 14 and of the ring nut 9 in the opening direction "R2" of the dispensing head 1.

In other words, the tabs 20 engage against the lower profile of the cylindrical crown 18, suitably shaped with a series of projecting teeth spaced by the same number of recesses.

In the event of an accidental reciprocal rotation between the dispensing head 14 and the ring nut 9 in the opening direction "R2" of the dispensing head 1, the resulting "R" between the contact forces exchanged between the teeth 19 and the tabs 20 is guided almost like the respective tongues 20, thus better withstanding the deformations (fig. 6 c).

In the event of reciprocal rotation between the dispensing head 14 and the ring nut 9 in the closing direction "R1" of the dispensing head 1, the resulting "R" between the contact forces exchanged between the teeth 19 and the tabs 20 is directed transversely with respect to the respective tabs 20 (fig. 6 d). In this way, the tabs 20 bend to allow the teeth 19 to pass through.

The above described embodiment of the dispenser 1 is particularly advantageous for dispensers 1 of the "down lock" type, such as shown in the drawings.

Advantageously, the dispenser 1 is able to overcome the drawbacks of the prior art.

Advantageously, in the closed configuration, the coupling between the gripping element 13 and the toothed profile 18a significantly reduces the risk of accidental opening of the dispenser 1.

Advantageously, the protective skirt 17 allows a better protection of the internal components of the dispenser 1, and in particular of the gripping elements 13 and the toothed profile 18 a.

Advantageously, the above-described dispenser 1 has a high degree of impact resistance and/or crush resistance during the step of transportation to the end user.

Advantageously, the above-described dispenser 1, even if poorly packed, is able to withstand the impacts that can cause accidental opening of the dispensers of the prior art type.