EP4070687B1 - Applicator unit; refillable; easy to rupture - Google Patents

Description

The invention relates to an application unit with a cartridge made of a mass-carrying cartridge.

TECHNICAL BACKGROUND

Cosmetic products and applicators for applying applicator mass, such as mascara, lip gloss, eyeliner, etc., according to the state of the art are characterized by the fact that the cosmetic products and applicators are completely thrown away after the applicator mass has been largely used up. Inevitably, parts of the cosmetic product and applicator are also thrown away that could actually be reused. Such cosmetic products and applicators according to the state of the art are not sustainable. The document US 2009/067913 A1 discloses an application unit according to the preamble of claim 1.

TASK OF THE INVENTION

It is therefore an object of the invention to create an application unit which is sustainable and in particular in which a large proportion of the application unit is reusable compared to the prior art.

SOLUTION ACCORDING TO THE INVENTION

This object is achieved with an application unit having the features of claim 1 and/or with a replacement cartridge having the features of claim 13.

According to the invention, the application unit comprises a cartridge made of a mass-carrying cartridge and a a one-piece, integral closure on the cartridge that seals it. The application unit comprises a cartridge sleeve for receiving the cartridge and a closure sleeve for receiving the closure. The cartridge sleeve and the cartridge as well as the closure sleeve and the closure form - in pairs - a first or a second locking coupling for axially securing one part to the other part. At least one of the two locking couplings is advantageously designed in such a way that it allows free movement in the circumferential direction so that the components axially secured to one another by it can rotate relative to one another in the circumferential direction. At least one of the two locking couplings is designed in such a way that the cartridge sleeve and the closure sleeve can in turn be secured to one another and at the same time have a force converter that converts a rotation of the cartridge sleeve relative to the closure sleeve into an axial force or an axial force component that pushes the closure sleeve off the cartridge sleeve.

By solving the problem with an application unit according to the invention, several advantages arise at the same time. Firstly, a sustainable solution is achieved due to the replaceable cartridge, which comprises the cartridge and the closure. At the same time, a very visually attractive appearance of the application unit can be maintained, for example by making the outer surfaces of the cartridge sleeve and/or closure sleeve attractive and, if necessary, also elaborately designed. Due to the reusability of these parts in particular, complex production can be accepted here. Design elements that can be used for decoration, such as a metallic appearance, screen printing, or the like, can be omitted. At the same time, a tactilely appealing material can be selected, because sustainability is essentially the result of the replaceable cartridge and the reusability of the sleeves with the tactilely appealing material, and not, as would be conceivable alternatively, through pure material reduction. In summary, an inventive application unit enables a balance between sustainability, customer benefit, convenience and appearance.

The fact that the cartridge and closure are designed as a single piece until opened and cannot be put back together after opening, i.e. cannot be closed again without the application unit, in particular without the cartridge sleeve and closure sleeve, results in the further advantage that the user cannot just buy and use the cartridge, but needs the entire application unit to use it. If the cartridge is opened, it can only be closed again in the application unit; outside the application unit the cosmetic mass would dry out. The closure sleeve and cartridge sleeve, which are connected to one another like a screw, ensure that a closure takes place and the cosmetic mass does not dry out. This is the only way to ensure that the application unit is used as specified by the manufacturer, and in particular hygienically. It can also be ensured that cosmetic mass does not accidentally leak out.

ADVANTAGEOUS OPTIONS FOR UNIFYING THE INVENTION

Advantageously, the cartridge has a predetermined breaking point in the area of the transition between the cartridge and the closure that seals it, which is designed in such a way that the cartridge, after being inserted into the cartridge sleeve and the closure sleeve and closed, breaks open at the predetermined breaking point when the closure sleeve is first fully opened or unscrewed relative to the cartridge sleeve. This ensures that the cartridge breaks open at exactly the desired point, which in particular enables the functionality of the application unit to be ensured.

Preferably, the locking couplings are designed in such a way that they can be separated from one another without the need for tools. This means that no tools are required when replacing an old cartridge with a new one. Instead, the user can replace the cartridge without tools and thus almost anytime and anywhere, which is particularly useful when changing cartridges outside the home.

It is practical for the locking coupling between the cartridge and the cartridge sleeve to be arranged in the area or directly at the distal end of the cartridge (relative to the handle). It is practical for the locking coupling between the closure and the closure sleeve to be arranged in the area or directly at the proximal end of the closure (relative to the handle). It is practical for the cartridge sleeve to have a pressure element on its distal end, by pressing this element preferably without tools, ideally with the fingertip, the locking coupling between the cartridge and the cartridge sleeve can be released without tools. It is practical for the closure sleeve to have a pressure element on its distal end. a pressure element on the proximal end face, which can be pressed in without tools, ideally with the fingertip, to release the locking coupling between the closure and the closure sleeve without tools. In this place there is usually a straight or not very rounded surface on which the pressure element fits well and is also easy to operate. In addition, such a pressure element is easy to operate at this point, usually with the thumb, with the other fingers holding the cartridge sleeve or the closure sleeve and the thumb only actuating the pressure element. The closure elements also hold the cartridge in a stable position, especially until the cosmetic mass has been used up.

Advantageously, a coupling element of the locking coupling, preferably the one associated with the cartridge and/or the closure, is a locking ring with a circumferential locking collar that protrudes in the radial direction. Such a locking ring with a locking collar is not only easy to manufacture, but also enables the closure or cartridge to be rotated in a simple manner relative to the closure sleeve or the cartridge sleeve.

Preferably, the other coupling element of the locking coupling, preferably the one associated with the cartridge sleeve and/or the closure sleeve, is formed by at least two locking arms which, when coupled, engage behind the locking ring associated with them. This enables a good locking coupling.

The pressure element is designed and approaches the locking arms in the depressed state in such a way that it pushes the locking arms apart and thus disengages them from their coupling partner, which is preferably designed in the form of a locking ring. This allows the locking device to be easily uncoupled or released, particularly when there is little space required inside the application unit.

Advantageously, the locking arms and the locking ring are designed in such a way that the locking arms can slide endlessly along the locking ring when the part carrying them is rotated relative to the part carrying the locking ring, even when locked. This makes it easy to ensure that the closure or cartridge can rotate relative to the closure sleeve or cartridge sleeve.

The force converter is preferably a thread or threaded section. A screw cap has the advantage that the user can operate it easily. A screw cap is usually intuitive to use. A screw cap can be operated reversibly, usually over an extremely large number of repetitions, in particular usually more often than, for example, a simple snap or click cap. The frequent reusability ensures sustainability.

The force converter is usually a non-helical slide ramp, ideally one that is effective in both directions of rotation. This ensures that the cartridge closes properly.

According to the invention, the replacement cartridge comprises a mass-carrying cartridge and a closure that is integral to the cartridge until it is opened and seals it. The cartridge and the replacement cartridge are expediently of identical construction.

An advantageous embodiment of the invention is described below with reference to the figures. The advantageous embodiment is intended to merely illustrate the invention without restricting it.

FIGURE LIST

• Fig. 1 shows an application element in a side view,
• Fig. 2 shows a cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge in a side view,
• Fig. 3 shows the cartridge after opening with the cartridge and the cap separated from the cartridge in a side view,
• Fig. 4 shows the application element in a closed state in a side view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 5 shows the application element in an opened state in a side view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 6 shows a section of the application element in a perspective view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 7 shows the application element in a closed state in a side view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 8 shows a cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge,
• Fig. 9 shows a part of the application element in a closed state in a perspective view without cartridge sleeve,
• Fig. 10 shows a section of the application element in a perspective view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 11 shows a section of the application element in a side view with partially transparent wall elements to make the interior of the application element visible,
• Fig. 12 shows the application element in a perspective view, wherein the application element is shown in a closed state,
• Fig. 13 shows the partially transparent application element in a perspective view, wherein the application element is shown in a closed state,
• Fig. 14 shows the partially transparent application element in a side view,
• Fig. 15 shows the partially transparent application element in a top view to visualize the position of the cut CC,
• Fig. 16 shows the application element in a sectional view along the cutting line CC from Fig. 15 ,
• Fig. 17 shows the application element in a sectional view, whereby the sectional view is an enlarged representation of a part of the Fig. 16 represents
• Fig. 18 shows the application element in a perspective view, wherein the application element is shown in an opened state,
• Fig. 19 shows the partially transparent application element in a perspective view, wherein the application element is shown in an opened state,
• Fig. 20 shows the application element in a sectional view,
• Fig. 21 shows the application element in a partial sectional view,
• Fig. 22 shows the cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge in a perspective view,
• Fig. 23 shows the partially transparent cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge in a perspective view,
• Fig. 24 shows the cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge in a side view,
• Fig. 25 shows the cartridge up to the opening with a cartridge and a one-piece integral closure on the cartridge in a top view to visualize the position of the section CC,
• Fig. 26 shows the cartridge in a sectional view along the section line CC from Fig. 25 ,
• Fig. 27 shows the cartridge after opening with the cartridge and the cap separated from the cartridge in a perspective view,
• Fig. 28 shows the partially transparent cartridge after opening with the cartridge and the cap separated from the cartridge in a perspective view,
• Fig. 29 shows the cartridge after opening with the cartridge and the cap separated from the cartridge in a top view to visualize the position of the cut HH,
• Fig. 30 shows the cartridge comprising a closure in a side view and comprising a cartridge in a sectional view along the section line HH of Fig. 29 ,
• Fig. 31 shows the cartridge after opening with the cartridge and the cap separated from the cartridge in a bottom view to visualize the position of the cut EE,
• Fig. 32 shows the cartridge in a sectional view along the section line EE from Fig. 31 ,
• Fig. 33 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a side view,
• Fig. 34 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a perspective view,
• Fig. 35 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a perspective view,
• Fig. 36 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a perspective view,
• Fig. 37 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a perspective view,
• Fig. 38 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a side view,
• Fig. 39 shows parts of the application element, such as the cartridge sleeve, the cartridge, the closure and parts of the closure sleeve in a top view,
• Fig. 40 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a perspective view,
• Fig. 41 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a perspective view, whereby the Fig. 41 an enlarged view of part of the Fig. 40 represents
• Fig. 42 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a side view,
• Fig. 43 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a top view,
• Fig. 44 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a bottom view for visualization of the position of the cut HH,
• Fig. 45 shows the application element with partially cut and removed parts for schematic visualization of the inner workings of the application element in a sectional view according to the cutting line HH from Fig. 44 .

EXAMPLE OF IMPLEMENTATION

The Fig. 1 shows an application unit 1. The application unit 1 comprises a cartridge sleeve 2 and a closure sleeve 3. As can be seen in the Figures 4 and 5 and 12 to 21, the cartridge case 2 and the closure sleeve 3 are in a closed state ( Fig. 4 and 12 to 17 ) of the application unit 1 are firmly connected to each other, in the embodiment firmly screwed together. In an open state ( Fig. 5 and 18 to 21 ) of the application unit 1, the cartridge sleeve 2 and the closure sleeve 3 are separated from each other. A screw connection 4 is provided for fastening the closure sleeve 3 to the cartridge sleeve 2. The screw connection 4 comprises screw-like threads 4' on the cartridge sleeve 2 and nut-like threads 4" on the closure sleeve 3, as can be seen well in the Fig. 18 to 20 can be seen. The screw connection 4 serves as a force converter, whereby a force in the longitudinal direction of the application element 1 is generated, particularly when unscrewing. The use of the force in the longitudinal direction of the application element 1 is described further below.

Although this is not shown figuratively, it should be noted that instead of a thread, a single or multiple, usually non-helical sliding ramp can be provided as a force converter. Such a sliding ramp can look like the one in the German utility model DE 202010011471 the applicant in paragraphs 0030 and 0031 of the official publication with reference to the associated figures. The corresponding embodiments of the said utility model are hereby made the subject of today's disclosure by reference to the utility model.

A cartridge 6 is arranged within the application element 1. The cartridge 6 is arranged completely within the application element 1 in Fig. 1 and 4 as well as Fig. 12 to 17 shown closed state of the application element 1. The cartridge 6 is at least partially visible in Fig. 5 as well as in Fig. 18 to 21 shown open state of the application element 1. The cartridge 6 comprises a cartridge 7. A cosmetic compound, for example mascara, lip gloss, eyeliner, etc., is stored in the cartridge 7. The cartridge 7 is therefore expediently cylindrical, in the form of a hollow cylinder for holding the cosmetic compound in the cavity of the cylinder. In some cases, a conical shape is particularly advantageous, namely when the inner peripheral surface of the cartridge sleeve forms a corresponding counter-cone and the cartridge and the cartridge sleeve are coordinated with one another in such a way that they come to rest relative to one another with no play or (slightly) spread apart at the very moment when they snap into place. In this way, a lack of play and, at the same time, particularly smooth assembly and disassembly can be ensured in a particularly simple manner. Because as soon as the conical seat surfaces have been lifted apart from one another, the further disassembly process can take place almost frictionlessly.

The cartridge includes a closure 8. In Fig. 2 as well as Fig. 22 to 25 In the newly manufactured state of the cartridge 6 shown, the closure 8 and the cartridge 7 are formed as one piece. The cartridge 7 thus seals the closure 8. A predetermined breaking point 9 is provided on the cartridge 6. When the force described above is applied in the longitudinal direction of the application element 1, the force acts on the cartridge 7 and closure 8, whereby when this force is applied, the Closure 8 is separated from cartridge 7 at the predetermined breaking point 9. This occurs particularly when the closure sleeve 3 is first unscrewed from the cartridge sleeve 2. This ensures that the cartridge can always be opened without the risk of spilling or splashing the substance through a clumsy attempt to open the cartridge. This is not the case outside of the invention. Not every consumer reads the operating instructions first. Often, attempts to open the cartridge are made intuitively.

Fig. 2 and 3 as well as the Fig. 22 to 32 show the cartridge 6 outside the application element 1. Fig. 4 and 5 as well as Fig. 12 to 21 show the cartridge 6 installed in the application element 1. Fig. 33 to 45 show the cartridge 6 in the installed state in the application element, whereby in the Fig. 33 to 45 Parts of the application element 1 have been omitted for better visualization of the installation state of the cartridge 6 in the application element 1. In the figures mentioned in this paragraph, it can be clearly seen that the closure 8 is received by the closure sleeve 3 and that the cartridge 7 is received by the cartridge sleeve 2.

The cartridge sleeve 2 and the cartridge 7 form a first locking coupling 10. The first locking coupling 10 serves to axially fix the cartridge 7 to the cartridge sleeve 2. The closure sleeve 3 and the closure 8 form a second locking coupling 11. The second locking coupling 11 serves to axially fix the closure 8 to the closure sleeve 3.

The first locking coupling 10 and the second locking coupling 11 are of identical design in the embodiment. The functionality is therefore explained below using the Fig. 4, 5 , 6, 7 and 9 until 11 as well as Fig. 13 to 21 and Fig. 40 to 42 shown second locking coupling 11, whereby the following explanations also apply to the first locking coupling 10 - this is particularly easy to see from the Fig. 17 , in which the first locking coupling 10 is shown enlarged, but which in particular has the same functionality and in particular the same components as the second locking coupling 11. The locking coupling 10, 11 is designed in such a way that it allows free movement in the circumferential direction, so that the components axially fixed to one another by it, namely the closure sleeve 3 and closure 8, can rotate relative to one another in the circumferential direction. This is necessary in order to be able to screw the cartridge sleeve 2 to the closure sleeve 3 when a newly inserted cartridge 6 is inserted - in particular without damaging the cartridge 6. We now look at the Fig. 4 If the used application unit 1 shown is opened for the first time after inserting a new, still integrally sealed cartridge 6, the force converter converts a rotation of the cartridge sleeve 2 relative to the closure sleeve 3 into an axial force or an axial force component that pushes the closure sleeve 3 away from the cartridge sleeve 2, in particular when the closure sleeve 3 is first completely unscrewed relative to the cartridge sleeve 2. The cartridge 6 is broken at the predetermined breaking point 9, whereby the interior of the cartridge 7 opens. The cosmetic mass is thus released and can be applied by a user.

The axial force is also used in "daily" use. The axial force is used to close a cartridge 6, which is arranged in the application unit 1, once it has been opened. The axial force not only presses the closure sleeve 3 onto the cartridge sleeve 2, but preferably also the closure 8 onto the cartridge. 7. For this purpose, a, in particular conical, Fig. 5 The contact surface 5 shown in the drawing is provided on the cartridge sleeve 2. The contact surface 5, which is in particular conical, acts like a seal with respect to the closure sleeve 3. It goes without saying that the contact surface 5, which is in particular conical, can be arranged on the closure sleeve 3 in a further embodiment and thus in particular not on the cartridge sleeve 2. The cartridge 7 seals off the closure 8 or the cartridge sleeve 2 seals off the closure sleeve 3 so that no cosmetic mass can escape from the application unit 1. This prevents the cosmetic mass from drying out. In particular, a largely airtight seal is achieved.

Preferably, the closure 3 comprises an application element 12, which serves to apply the cosmetic mass to the user. In Fig. 3 In the open state of the application unit 1 shown in FIG. 1, the application element 12, which is particularly integral and expediently formed as one piece on the closure 3, protrudes in the axial direction. The application element 12 is expediently a tube, a brush, or the like. In the Fig. 2 In the closed state of the application unit 1 shown, the application element 12 projects into the interior of the cartridge 7 and is thereby wetted in particular by the cosmetic mass.

The functionality of the locking coupling 10, 11 will be explained in more detail below. In the exemplary embodiment, particular emphasis was placed on the fact that the locking couplings 10, 11 are designed in such a way that they can be separated from one another without tools. In another exemplary embodiment, it is of course conceivable that a tool may be required.

For the sake of simplicity, the functions of the essentially identical locking couplings 10, 11 will be described below based on the function of the second locking coupling 11. The only significant difference between the two locking couplings 10, 11 is that the first locking coupling 10 is arranged between the cartridge 7 and the cartridge sleeve 2 in the area or directly at the distal end (relative to the handle) of the cartridge 2 and/or that the second locking coupling 11 is arranged between the closure 8 and the closure sleeve 3 in the area or directly at the proximal end (relative to the handle) of the closure.

The cartridge sleeve 2 has on its distal end a Fig. 4, 5 and 7 as well as in the Fig. 13 , 14, 16, 17 , 20, 21 , 42 and 45 shown first pressure element 12. The first pressure element 12 can preferably be pressed in without tools, for example with the fingertip or the finger pad, preferably the thumb. By pressing in the first pressure element 12, the first locking coupling 10 is released. The cartridge 7 is thereby released from the cartridge sleeve 2 and can be removed in order to create space for a new cartridge 6, in particular for a replacement cartridge.

The closure sleeve 3 and the closure 8 are designed in a similar way. The closure sleeve 3 has a recess on its distal end face that is Fig. 4 to 7 and 9 to 11 as well as Fig. 13 , 14 , 16 , 18 to 21 and 33 to 45 shown second pressure element 13. The second pressure element 13 can preferably be pressed in without tools, for example with the fingertip or the finger pad, preferably the thumb. By pressing the second pressure element 13, the second locking coupling 11. This releases the bolt 6 from the bolt sleeve 3 and allows it to be removed to make room for a new cartridge 6, in particular for a replacement cartridge.

The locking coupling 12, 13 comprises two Fig. 6 and 8 to 11 shown locking elements 14, 15. A coupling element 15 of the two locking elements, preferably the coupling element 15 assigned to the cartridge 7 and/or the closure 8 (cf. Fig. 8 as well as Fig. 22 to 32 ) is designed in the form of a locking ring with a circumferential locking collar protruding in the radial direction. The locking collar is preferably formed at the outer end of the cartridge 6 and closes off the cartridge 6.

The other coupling element 14 of the locking coupling, preferably the coupling element 14 assigned to the cartridge sleeve 2 and/or the closure sleeve 3 (cf. Fig. 6 , 9 to 11 and 17 and 41) is formed by at least two locking arms 16, which in the coupled state engage behind the locking ring 15 assigned to them. This fully coupled state is in Fig. 11 , 17 and 41 A partially or even completely unlocked state is shown in the Fig. 6 and 9 shown.

Good in Fig. 11 and 17 The shape of the locking arm 16 can be seen. The locking arm 16 has a locking surface 17', which engages behind the locking ring 15 and rests against it in the locked state. The locking arm 16 has an opening surface 18, which serves to enable the pressure element 12, 13 to press against the opening surface 18 in order to bend or move the locking arm, pivot it, or the like, so that the locking connection is released. The pressure element 13 is designed in such a way and approaches the locking arms 16 in the depressed state. state such that it presses the locking arms 16 apart and thus disengages them from their coupling partner, which is preferably designed in the form of the locking ring 15.

In the exemplary embodiment, the locking arms 16 and the locking ring 15 are designed in such a way that the locking arms 16 can slide endlessly along the locking ring 15 when the part carrying them rotates relative to the part carrying the locking ring 15, even when locked. This is particularly advantageous when inserting a new (replacement) cartridge 6, specifically when screwing the closure sleeve 3 onto the cartridge sleeve 2 for the first time, because the cartridge 6 can then rotate freely.

In the embodiment, the locking arms 16 are attached to a Fig. 6 and 9 shown locking unit 17, in particular in one piece. The locking unit 17 comprises a cylindrical or ring-shaped unit 18. The ring-shaped unit 18 in the exemplary embodiment is flush with the closure 8, in particular with the locking ring 15 arranged on the closure 8 - as already mentioned several times, the same applies to the cartridge. The locking unit 17 comprises the two locking arms 16. The locking unit 17 comprises two locking hooks 19. Each of the two locking hooks 19 comprises two locking fingers 20. The locking hooks 19 and the locking fingers 20 lock with the closure sleeve 3 and with the cartridge sleeve 2, respectively. The locking unit 17 is thus locked with the closure sleeve 3 and with the cartridge sleeve 2, and the coupling elements 14 are thus positioned accordingly. The locking unit 17 is expediently locked firmly with the closure sleeve 3 and with the cartridge sleeve 2, in particular not rotatable.

The cartridge 6 can be replaced by a replacement cartridge. The replacement cartridge is expediently constructed identically to the cartridge 6. The replacement cartridge comprises a mass-carrying cartridge and a closure which is integrally attached to the cartridge until it is opened and seals it, in particular for replacing the cartridge in the application element according to one of claims 1 to 12.

For the sake of completeness, it should be mentioned that cartridge 6 and replacement cartridge refer to identical versions of cartridge 6. The difference is simply that the replacement cartridge replaces cartridge 6, especially after cartridge 6 has been partially or completely emptied of the cosmetic mass.

Claims (13)

1. Application unit (1) with a cartridge (6) formed by a mass-conducting cartridge (7) and a closure (8) integrally and as one piece formed on the cartridge (7) which seals it until initial use, , and with a cartridge sleeve (2) to hold the cartridge (7) and a closure sleeve (3) to hold the closure (8), wherein the cartridge sleeve (2) and the cartridge (7) form a first snap coupling (10) to axially secure one part to the other, and the closure sleeve (3) and the closure (8) form a second snap coupling (11) to axially secure one part to the other, characterized in that at least one of the two snap couplings (10, 11) is designed to allow play in the circumferential direction, so that the components axially secured by it can rotate relative to each other in the circumferential direction, and that the cartridge sleeve (2) and the closure sleeve (3) can be secured to each other while simultaneously having a force converter that transforms rotation of the cartridge sleeve (2) relative to the closure sleeve (3) into an axial force or an axial force component, which pushes the closure sleeve (3) away from the cartridge sleeve (2).
2. Application unit (1) according to claim 1, characterized in that the cartridge (6) has a predetermined breaking point (9) in the area of the transition between the cartridge (7) and the sealing closure (8), designed so that the cartridge (6), after being inserted into the cartridge sleeve (2) and the closure sleeve (3) and being closed, breaks open at the predetermined breaking point (9) upon the first full opening by rotation of the closure sleeve (3) relative to the cartridge sleeve (2).
3. Application unit (1) according to claim 1 or 2, characterized in that the snap couplings (10, 11) are designed to be separable without tools.
4. Application unit (1) according to any of the preceding claims, characterized in that the snap coupling (10) between the cartridge (7) and the cartridge sleeve (2) is arranged in the area or directly at the distal front end of the cartridge (7) (relative to the handle), and/or that the snap coupling (11) between the closure (8) and the closure sleeve (3) is arranged in the area or directly at the proximal front end of the closure (8).
5. Application unit (1) according to any of the preceding claims, characterized in that the cartridge sleeve (2) carries a pressure element (12) at its distal front end, by means of which the snap coupling (10) between the cartridge (7) and the cartridge sleeve (2) can be released without tools, preferably by pressing it in without tools, ideally with the fingertip.
6. Application unit (1) according to any of the preceding claims, characterized in that the closure sleeve (3) carries a pressure element (13) at its proximal front end, by means of which the snap coupling (11) between the closure (8) and the closure sleeve (3) can be released without tools, preferably by pressing it in without tools, ideally with the fingertip.
7. Application unit (1) according to any of the preceding claims, characterized in that one coupling element of the snap coupling (10, 11), preferably the one associated with the cartridge (7) and/or the closure (8), is a snap ring (15) with a circumferential snap collar protruding in the radial direction.
8. Application unit (1) according to any of the preceding claims, characterized in that the other coupling element of the snap coupling (10, 11), preferably the one associated with the cartridge sleeve (2) and/or the closure sleeve (3), is formed by at least two snap arms (16), which, in the coupled state, engage behind the snap ring (15) assigned to them.
9. Application unit (1) according to any of the preceding claims, characterized in that the pressure element (13) is designed in such a way and approaches the snap arms (16) in the pressed-down state in such a manner that it spreads the snap arms (16) apart and thus disengages them from their coupling partner, which is preferably designed in the form of a snap ring (15).
10. Application unit (1) according to any of the preceding claims, characterized in that the snap arms (16) and the snap ring (15) are designed in such a way that the snap arms (16), when the part carrying them is rotated relative to the part carrying the snap ring (15), can endlessly glide along the snap ring (15) even in the locked state.
11. Application unit (1) according to any of the preceding claims, characterized in that the force converter is a thread (4, 4', 4") or a threaded section (4, 4', 4").
12. Application unit (1) according to any of claims 1 to 10, characterized in that the force converter is a mostly non-helical sliding ramp, ideally a sliding ramp effective in both rotational directions.
13. Replacement cartridge (6) formed by a mass-conducting cartridge (7) and a closure (8) integrally and as one piece formed on the cartridge (7) which seals it until initial use, for replacing the cartridge (6) in the application unit (1) according to any of claims 1 to 12, wherein when the replacement cartridge (6) is inserted into the application unit (1), the cartridge sleeve (2) of the application unit (1) and the cartridge (7) form a first snap coupling (10) to axially secure one part to the other, and the closure sleeve (3) of the application unit (1) and the closure (8) form a second snap coupling (11) to axially secure one part to the other, wherein at least one of the two snap couplings (10, 11) is designed to allow play in the circumferential direction, so that the components axially secured by it can rotate relative to each other in the circumferential direction, wherein the cartridge sleeve (2) and the closure sleeve (3) can be secured to each other and simultaneously have a force converter that transforms the rotation of the cartridge sleeve (2) relative to the closure sleeve (3) into an axial force or an axial force component, which pushes the closure sleeve (3) away from the cartridge sleeve (2), thereby breaking a predetermined breaking point (9) of the cartridge (6), which is located in the area of the transition between the cartridge (7) and the sealing closure (8), and which is designed in such a way that the cartridge (6) breaks open at the predetermined breaking point (9) after being inserted into the cartridge sleeve (2) and the closure sleeve (3) and being closed, during the first full opening by rotation of the closure sleeve (3) relative to the cartridge sleeve (2).

Images