Device for applying makeup product

Abstract

The present invention relates to an apparatus (10) for applying cosmetics, particularly a cosmetic stick (12), the apparatus comprising: a cup-shaped member (30) including at least one radial lug (32); a guide (14) including a tubular body (16) extending to an upper opening (20), the cup-shaped member (30) being slidably mounted in the guide along an axial direction; a tubular sheath (40) in which the body (16) is rotatably mounted, rotation of the guide (14) relative to the sheath (40) causing axial movement of the cup-shaped member (30) between a maximum extended position and a maximum retracted position through the opening (20); characterized in that the sheath (40) includes an elastically deformable upper lip (60) extending radially above the opening (20) of the guide (14), the inner diameter (D1) of the upper lip (60) being smaller than the inner diameter (D2) of the tubular body (16) in a stationary state.

Description

Technical Field

[0001] This invention relates to a device for applying cosmetics, particularly cosmetic sticks, comprising:

[0002] - A cup-shaped member designed to receive a cosmetic stick and including at least one radial lug;

[0003] - A guide member comprising a tubular body in which a cup-shaped member is slidably mounted axially, the guide member comprising at least one slit through which at least one associated lug of the cup-shaped member passes;

[0004] - A tubular sheath, in which the body is rotatably mounted, the sheath including at least one groove inside for receiving at least one lug of a cup-shaped member, the rotation of the guide relative to the sheath causing axial movement of the cup-shaped member between a maximum extended position and a maximum retracted position. Background Technology

[0005] As is known from the prior art, this type of device is used for packaging cosmetics, such as cosmetic sticks, particularly but not limited to lipsticks. Such cosmetic sticks will be referred to as "sticks" hereinafter and in the claims.

[0006] The stick is held in a cup-shaped member by its base, which slides axially between at least one retracted position and a cosmetic application position, in which at least a portion of the cosmetic stick extends axially out of the device.

[0007] In a known manner, this movement is achieved by a rotating mechanism comprising a guide and a sheath, which are concentrically mounted, one of which includes at least one groove and the other includes at least one helical groove, with at least one lug fixed to a cup-shaped member of a support rod passing radially through the at least one groove and the at least one helical groove, respectively.

[0008] The cup-shaped part typically includes a pair of lugs arranged opposite each other along the diameter, the guide is equipped with two grooves, and the sheath is equipped with two spiral grooves.

[0009] Typically, the actuation of this mechanism is manually controlled by applying a rotational motion to the base of the device, which is transmitted to the mechanism, causing the cup-shaped piece containing the cosmetic to undergo axial displacement.

[0010] There are known methods for forming cosmetic sticks.

[0011] One method involves molding the stick by injecting liquid cosmetic directly into the cup-shaped part of a pre-installed device. However, this method is complex and time-consuming.

[0012] Another method is to pre-form the cosmetic stick and then insert it into the cup-shaped part after the device is installed. During this operation, the cup-shaped part is in its maximum application position. This method allows for increased productivity because it eliminates the need to add stick formation time to the device installation process, as the stick is already formed when it is inserted into the cup-shaped part.

[0013] A method has been proposed to forcefully insert the rod into the cup-shaped part. However, sometimes the rod fails to be pressed in correctly. For example, the rod may be tilted relative to the sliding axis of the cup-shaped part. As a result, when the cup-shaped part retracts, the rod may rub against the edge of the guide and / or the sheath. Consequently, the rod is damaged, and the device becomes soiled with cosmetics. Summary of the Invention

[0014] This invention relates to an apparatus for applying cosmetics, particularly a cosmetic stick, the apparatus comprising:

[0015] - A cup-shaped member, said cup-shaped member being designed to receive a rod, and comprising a cylindrical wall and at least one radial lug;

[0016] - At least one guide member, the guide member comprising a tubular body extending to an upper outlet opening for a rod, a cup-shaped member mounted in the guide member to be axially slidable, the guide member comprising at least one slit through which at least one associated lug of the cup-shaped member passes;

[0017] - A tubular sheath, the main body of which is rotatably mounted in the sheath, the sheath including at least one groove inside for receiving at least one lug of a cup-shaped member, the rotation of the guide relative to the sheath causing axial movement of the cup-shaped member between a limit extended position and a limit retracted position through the upper outlet opening.

[0018] The device manufactured according to the teachings of the present invention is characterized in that the sheath includes an upper sealing lip, which is designed to make sealing contact with the cylindrical wall of the cup-shaped member along an annular contact line at the extreme unfolded position, so as to seal the radial annular space between the sheath and the cup-shaped member.

[0019] According to another feature of the device manufactured in accordance with the teachings of the present invention, the sheath includes an elastically deformable upper sealing lip having a closed annular shape, the upper sealing lip extending radially inward above the upper outlet opening of the guide, and in a stationary state, the inner diameter of the upper sealing lip is smaller than the inner diameter of the tubular body.

[0020] According to another feature of the device manufactured in accordance with the teachings of the present invention, in the extreme extended position of the cup-shaped member, the upper sealing lip is radially pressed against the cylindrical wall of the segment of the cup-shaped member in a substantially airtight manner along the annular contact line.

[0021] According to another feature of the device manufactured in accordance with the teachings of the present invention, in a static state, the inner diameter of the upper sealing lip is larger than the inner diameter of the cup-shaped member.

[0022] According to another feature of the device manufactured in accordance with the teachings of the present invention, the upper sealing lip and the sheath are made as one piece.

[0023] According to another feature of the device manufactured in accordance with the teachings of the present invention, the sheath is made of plastic material.

[0024] According to another feature of the device manufactured in accordance with the teachings of the present invention, the device includes an airtight member that is radially inserted between the guide and the sheath, located below at least one slit for guiding the guide.

[0025] According to another feature of the device manufactured in accordance with the teachings of the present invention, the airtight member has a lower lip with a closed annular shape, the lower lip extending radially outward from the guide member, and the lower lip being tightly fitted into the sheath along the annular contact line.

[0026] According to another feature of the device manufactured in accordance with the teachings of the present invention, the lower lip and the guide are made as one piece.

[0027] According to another feature of the device manufactured in accordance with the teachings of the present invention, the cup-shaped member includes at least one upper suction port, which is located below the annular contact line that contacts the upper sealing lip when the cup-shaped member is in its extreme extended position.

[0028] According to another feature of the device manufactured in accordance with the teachings of the present invention, the guide includes at least one lower intake port located in a lower hub disposed at the lower end of the tubular body and communicating with the interior of the tubular body.

[0029] According to another feature of the device manufactured in accordance with the teachings of the present invention, when the cup-shaped member occupies the extreme extended position of the cup-shaped member, the sheath has an internal space axially defined between the lower lip and the upper sealing lip, the space communicating with the outside only through the lower suction port and the upper suction port. Attached Figure Description

[0030] Other features and advantages of the present invention will become apparent from the following detailed description, with reference to the accompanying drawings which are briefly described below for understanding the invention.

[0031] Figure 1 It is a perspective view showing a device made according to the teachings of the present invention in an installed position, wherein the cup-shaped part of the device occupies the ultimate retracted position.

[0032] Figure 2yes Figure 1 An exploded perspective view of the device, which includes a guide, a cup-shaped component, and a sheath.

[0033] Figure 3 Is with Figure 2 A similar view, showing the element along Figure 2 The cross-section taken from section 3-3.

[0034] Figure 4 It shows Figure 2 An enlarged perspective view of the lower side of the cup-shaped component.

[0035] Figure 5 It is along Figure 1 A sectional view taken from section 5-5, in which the cup-shaped part occupies its ultimate retracted position.

[0036] Figure 6 Is with Figure 5 A similar view, in which the cup-shaped piece occupies its maximum unfolded position. Detailed Implementation

[0037] By convention, the “axial” direction in the attached figure corresponds to the direction of the main axis A of the device (also called the mechanism), which is designed to be mounted on a base for actuating the application container of cosmetics (such as cosmetic sticks, especially lipsticks), and the “radial” direction is orthogonal to the axial direction by radiating from the main axis.

[0038] In the following detailed description of the accompanying drawings, the terms "upper" and "lower" or "top" and "bottom" will be used with reference to the axial direction. The upper portion of the device corresponds to the part through which the cosmetic stick extends from the device for application.

[0039] Similarly, referring to the radial direction, the terms "external or outer" and "internal or inner" are used, with the outer element being radially further away from axis A than the inner element.

[0040] The accompanying drawing shows a device 10, which is designed to be mounted on the base of a cosmetic applicator container.

[0041] Preferably, cosmetics (such as...) Figure 5 and Figure 6 (As shown by the dotted line in the image) is cosmetic stick 12, more specifically, cosmetic stick 12 is a lipstick or lip balm designed to be applied by rubbing.

[0042] The device 10 is designed to dissipate the cosmetic through at least one rotational motion.

[0043] The device 10 has an axis A, which is referred to as the main axis.

[0044] The device 10 includes at least one first element, which is generally and hereinafter referred to as guide 14. Specifically, guide 14 is... Figure 2 and Figure 3 As can be seen in the text.

[0045] The guide 14 mainly includes a tubular body 16 that extends axially from a hub 18 forming the lower end of the guide 14 to an upper outlet opening 20 intended to be passed through by the cosmetic stick 12.

[0046] For example, the outer surface of the hub 18 is provided with stripes to facilitate operation of the hub when using the device 10.

[0047] Preferably, the guide 14 includes at least one slit extending radially through the wall of the body 16. Each slit forms a groove. Here, the guide 14 includes a first slit 22 and a second slit 24 extending radially through the wall of the body 16. The slits 22 and 24 are arranged to be opposite each other diametrically.

[0048] Slits 22 and 24 extend axially into the body 16 of the guide 14, with the first slit 22 axially closed at its upper end and the second slit 24 open. Slits 22 and 24 close at their lower ends on the side of the hub 18.

[0049] Slits 22 and 24 each include straight and parallel edges. The first slit 22 includes an upper recess 26a at one axial end and a lower recess 28a at the other axial end, the recesses 26a and 28a extending circumferentially.

[0050] In both embodiments, the second slit 24 also includes an upper notch 26b and a lower notch 28b.

[0051] In a conventional system, notches 26a, 26b, 28a, and 28b are designed to form a stroke end locking element for the cup-shaped member 30.

[0052] like Figure 5 As shown, the device 10 includes a cup-shaped member 30 that receives the cosmetic stick 12.

[0053] The cup-shaped part 30 is designed to be in the extreme retracted position (such as...) Figure 5 (as shown) and the limit expansion position (as shown) Figure 6 The two parts (as shown) are slidably mounted in the guide 14 along the axial direction.

[0054] like Figure 5 As shown, the ultimate retraction position corresponds to the position where the rod 12 is located within the device 10 to protect and store the rod, and the cup-shaped member 30 is at the end of its low stroke.

[0055] like Figure 6 As shown, the extreme unfolding position corresponds to the position where the rod 12 is unfolded axially upwards such that the free end of the rod extends out of the device 10 through the upper outlet opening 20 and the cup-shaped member 30 is at the high stroke end position.

[0056] The cup-shaped part 30 can also be in the middle position between its extreme retracted position and extreme unfolded position, which is called the intermediate coating position.

[0057] like Figure 4 As shown, the cup-shaped member 30 includes at least one lug 32, preferably two lugs 32. Each lug 32 projects radially outward, and each lug 32 engages and extends through one of the slits 22, 24 of the guide member 14 to extend radially outward beyond the cylindrical outer surface of the body 16 of the guide member 14.

[0058] The cup-shaped member 30 includes an axially extending cylindrical wall 34. The cylindrical wall 34 defines a receiving portion 36 that receives the lower portion of the rod 12. The receiving portion 36 opens upward through an inlet 33. The receiving portion 36 is axially defined downward by a bottom 37. Ribs 38 are provided on the inner surface of the cylindrical wall 34, which are designed to securely attach the rod 12 to the receiving portion 36.

[0059] The outer surface of the cylindrical wall 34 is provided with protrusions 35, which form sliding pads that reduce the frictional surface between the cup-shaped member 30 and the guide member 14 to facilitate the sliding of the cup-shaped member 30. These protrusions 35 have an elongated shape oriented axially. The outer surface of the upper end section 39 of the cylindrical wall 34 does not have protrusions.

[0060] Device 10 includes a second element, referred to below as sheath 40. As shown here, sheath 40 has a cylindrical shape having a main axis A.

[0061] The sleeve 40 can receive an outer sleeve (not shown), and the sleeve 40 is inserted into and rotated to be secured within the outer sleeve by press-fitting or, alternatively, by using an adhesive.

[0062] Preferably, the sheath 40 includes at least one internal groove that receives the free end of the associated lug 32 of the cup-shaped member 30. Here, the sheath 40 includes two diametrically opposed grooves 42, 44, with the free end of the lug 32 of the cup-shaped member 30 engaging with these two grooves in operation. The sheath 40 includes an inner wall 46 provided with the spiral grooves 42, 44. The grooves 42, 44 have a spiral shape.

[0063] The sheath 40 includes an upper edge 50 at its upper axial end and a lower edge 52 at its lower axial end, the edges 50 and 52 being continuous in the circumferential direction.

[0064] The sleeve 40 is designed to be installed on the guide 14 via a snap-fit ​​mechanism to achieve a special effect after installation. Figure 1 , Figure 5 and Figure 6 The device 10 is shown. In the installed position, the upper outlet opening 20 of the guide 14 is arranged below the upper edge 50 of the sheath 40.

[0065] The guide member 14 is rotatably mounted in the sleeve 40 about the main axis "A". Therefore, the guide member 14 is concentrically received inside the sleeve 40. For this purpose, the outer diameter of the body 16 of the guide member 14 is substantially equal to the inner diameter of the sleeve 40.

[0066] exist Figure 5 and Figure 6 In the illustrated embodiment, the resilient snap-fit ​​is achieved in a non-limiting manner via an annular flange 54 projecting from the lower portion of the inner surface of the sleeve 40. A collar 56 projects radially from the outer surface of the body 16, adjacent to the hub 18. When the body 16 of the guide 14 is axially inserted from bottom to top through the lower opening of the sleeve 40, the collar 56 is designed to resiliently snap onto the flange 54 of the sleeve 40. Thus, the collar 56 axially abuts against the shoulder surface 57 of the sleeve 40.

[0067] Here, the slit 22 of the guide 14 opens upward through a cut 58 leading to the upper edge of the defining upper outlet opening 20 of the body 16. Due to this cut 58, the guide 14 can deform radially to facilitate the installation of the sheath 40 before returning to the initial shape of the guide.

[0068] In such a device 10, the guide member 14 causes axial movement of the cup-shaped member 30 by the rotation of its hub 18 relative to the sheath 40, or more precisely, causes upward or downward movement of the cup-shaped member 30 depending on the direction of rotation. When the cup-shaped member 30 is in its maximum extended position, the upper portion of the cup-shaped member 30 extends axially out of the sheath 40.

[0069] The cosmetic stick 12 moves axially between the extreme extended position and the extreme retracted position as the cup-shaped member 30 moves.

[0070] In the two embodiments shown, advantageously, the guide 14, the cup-shaped member 30, and the sheath 40 are made of plastic material.

[0071] Preferably, the guide 14, the cup-shaped member 30, and the sheath 40 are made of the same plastic material.

[0072] Plastic materials can be selected from polypropylene (PP), polyethylene terephthalate (PET), recycled polyethylene terephthalate (R-PET), thermoplastic elastomers (TPE), polyethylene (PE) such as low-density polyethylene (LDPE) and / or high-density polyethylene (HDPE), composites, post-consumer recycled (PCR) materials and / or similar materials.

[0073] These materials specifically include plastics with a hardness between 70 on the Shore A scale and 90 on the Shore D scale.

[0074] Preferably, the plastic material is polypropylene and / or polyethylene terephthalate, whether or not it is recycled polypropylene and / or recycled polyethylene terephthalate.

[0075] Therefore, advantageously, all components of the device 10 are made of plastic material, preferably selected from polypropylene and / or polyethylene terephthalate.

[0076] Components made of plastic materials can be easily obtained through injection molding, forming a lightweight device 10.

[0077] Furthermore, the use of plastic materials, particularly similar plastic materials, throughout the device 10 facilitates recycling. In particular, polypropylene and polyethylene terephthalate are two plastic materials with well-known recycling cycles.

[0078] Furthermore, the tubular body 16 of the guide member 14 is radially inserted between the cylindrical wall 34 of the cup-shaped member 30 and the sheath 40. Additionally, the protrusion 35 is also radially inserted between the inner surface of the tubular body 16 and the cylindrical wall 34 of the cup-shaped member 30. Therefore, at the extreme extended position of the cup-shaped member 30, a radial annular gap 59 exists between the cylindrical wall 34 of the cup-shaped member 30 and the cylindrical inner surface of the sheath 40.

[0079] The sheath 40 includes an upper sealing lip 60 that, in its extreme extended position, seals against the cylindrical wall 34 of the cup-shaped member 30 along the closed contact line 61 to seal the radial annular gap 59 between the sheath 40 and the cup-shaped member 30.

[0080] In this extreme extended position, the closed contact line 61 is arranged above the upper outlet opening 20 of the guide 14.

[0081] like Figure 5 and Figure 6 As shown, the upper sealing lip 60 has a closed annular shape, and when the device 10 is installed, the upper sealing lip extends radially inward over the upper outlet opening 20 of the guide 14. Here, the upper sealing lip 60 extends from the upper edge 50 of the sheath 40.

[0082] Additionally, when the cup-shaped member is in its maximum extended position, the upper sealing lip 60 extends axially below the upper edge of the cup-shaped member 30.

[0083] In an embodiment of the invention not shown, the upper sealing lip extends from the cylindrical inner surface of the sheath 40.

[0084] The upper sealing lip 60 is elastically deformable when bent. In particular, the upper sealing lip 60 is more flexible than the cylindrical wall 34 of the cup-shaped member 30. For example, due to having a smaller thickness than the wall of the sheath 40, the upper sealing lip 60 also has greater flexibility than the wall of the sheath 40.

[0085] Therefore, the upper sealing lip 60 has an inner free edge that forms a closed circle centered on the main axis A. For example... Figure 5 As shown, in a static state, the inner diameter "D1" of the upper sealing lip is smaller than the inner diameter "D2" of the tubular body 16 of the guide 14.

[0086] Furthermore, the inner diameter "D1" of the upper sealing lip 60 is smaller than the outer diameter "D3" of the upper end section 39 of the cylindrical wall 34 of the cup-shaped member 30. Therefore, when the cup-shaped member 30 slides from its retracted position to its extended position, the cup-shaped member causes the upper sealing lip 60 to deform upwards flexibly. In the extended position of the cup-shaped member 30, as... Figure 6 As shown, the free edge of the upper sealing lip 60 is thus radially tightened to the resting position of the upper sealing lip under the action of elastic restoring force, surrounding the cup-shaped member 30 along the annular contact line 61 in a substantially airtight manner. Figure 4 The contact line 61 in its fully extended position is shown in dashed lines. Contact line 61 is located on the upper end section 39 of the cylindrical outer surface of the cup-shaped member 30. This is a smooth section 39, causing contact line 61 to form a closed circle. Therefore, in the fully extended position, the upper sealing lip 60 forms an airtight contact with the cup-shaped member 30.

[0087] Furthermore, in the stationary state, advantageously, the inner diameter "D1" of the upper sealing lip 60 is larger than the inner diameter "D4" of the upper section of the cup-shaped member 30. The rod 12 housed in the cup-shaped member 30 has a generally cylindrical shape centered on the main axis A, and the outer diameter of the rod is equal to the inner diameter "D4" of the upper section of the cup-shaped member 30. Therefore, this arrangement allows the rod 12 to extend from the sheath 40 without being scratched by the free inner edge of the upper sealing lip 60.

[0088] Here, the upper sealing lip 60 and the sheath 40 are made as a single unit.

[0089] The device 10 also includes an airtight member that is radially inserted between the guide 14 and the sheath 40, located below the slits 22, 24 for guiding the guide 14.

[0090] Here, the airtight component is a lower lip 62 with a closed annular shape, which extends radially outward from the outer surface of the guide 14. The lower lip 62 is tightly fitted into the sleeve 40 along an annular contact line (not shown). Here, the lower lip 62 is arranged below the collar 56.

[0091] The lower lip 62 and the guide 14 are made as one piece.

[0092] Therefore, the lower lip 62 permanently rubs against the sheath 40. Thus, the lower lip provides slight resistance to the rotation of the sheath 40 relative to the guide 14. Specifically, this allows the cup-shaped member 30 to be stably held in the user-selected position without hindering the user's easy control over the sliding of the cup-shaped member 30.

[0093] When the cup-shaped member 30 is in its fully extended position, the internal space 63 between the upper sealing lip 60 and the lower lip 62 is substantially airtight, through contact between the upper sealing lip 60 and the cup-shaped member 30, and through contact between the lower lip 62 and the guide member 14. This internal space 63 is radially defined in a sealed manner by the cylindrical tubular wall of the sheath 40.

[0094] The cup-shaped member 30 includes at least one upper suction port 64, which, when in its fully extended position, is located below the annular contact line 61 that contacts the upper sealing lip 60. Here, at least one suction port 64 is arranged in the bottom 37 of the receiving portion 36. The cup-shaped member 30 includes a plurality (e.g., four) of identical suction ports 64 evenly distributed around the main axis A. Therefore, the receiving portion 36 communicates with the interior of the tubular body 16 through these upper suction ports 64.

[0095] The guide 14 also includes at least one lower intake port 66, which is located in the hub 18 of the guide and communicates with the interior of the tubular body 16. Here, the lower intake port 66 opens axially downward from the hub 18 and is coaxial with the main axis A.

[0096] Therefore, when the cup-shaped part 30 is in its maximum extended position, the internal space 63 is connected to the outside only through the lower suction hole 66 and the upper suction hole 64.

[0097] In particular, the present invention allows for the easy insertion of a pre-formed cosmetic stick 12 into the cup-shaped member 30 after the mounting device 10 is installed. For this purpose, as... Figure 6As shown, the cup-shaped member 30 is controlled in its maximum extended position. Therefore, the rod 12 comes into contact with the inlet 33 of the receiving portion of the cup-shaped member 30. The outer diameter of the rod 12 is substantially the same as the inner diameter of the inlet 33 of the receiving portion 36. Therefore, the rod 12 blocks the inlet 33.

[0098] Then, the rod 12 is drawn into the receiving portion 36 by suction. For this purpose, the lower suction port 66 of the hub 18 is connected to the low-pressure source in a sealed manner. Since the internal space 63 is airtight, the low pressure propagates into the receiving portion 36. The inlet 33 of this receiving portion is blocked by the rod 12, which is attracted by the suction cup effect and thus embedded in the receiving portion 36. In this case, the rib 38 engages with the base of the rod 12 to hold the rod in the cup-shaped member 30.

[0099] This method of installing the pre-formed rod 12 in the cup-shaped piece 30 ensures that the main axis of the rod 12 is correctly aligned with the main axis A of the device 10.

[0100] In addition to its sealing function, the upper sealing lip 60 also allows for braking of the cup-shaped member by friction when the cup-shaped member 30 reaches its maximum extended position. This allows the user to avoid feeling a sudden stop when the cup-shaped member 30 reaches the end of its stroke in the slits 22, 24.

Claims

1. An apparatus (10) for applying cosmetics, wherein the cosmetic is a cosmetic stick (12), the apparatus (10) comprising: - A cup-shaped member (30) designed to receive the cosmetic stick (12) and comprising a cylindrical wall (34) and at least one radial lug (32); - At least one guide (14) comprising a tubular body (16) extending to an upper outlet opening (20) for the cosmetic stick (12), a cup-shaped member (30) mounted in the guide to be axially slidable, the guide (14) comprising at least one slit (22, 24) through which at least one slit is passed by at least one associated lug (32) of the cup-shaped member (30); - A tubular sheath (40), in which the tubular body (16) is rotatably mounted, the tubular sheath (40) including at least one groove (42, 44) inside, the at least one groove for receiving at least one lug (32) of the cup-shaped member (30), the rotation of the guide member (14) relative to the tubular sheath (40) causing axial movement of the cup-shaped member (30) between a maximum extended position and a maximum retracted position through the upper outlet opening (20); Its features are, - The tubular sheath includes an upper sealing lip (60) designed to make a sealing contact with the cylindrical wall (34) of the cup-shaped member (30) along the annular contact line (61) at the extreme unfolded position, so as to seal the radial annular space between the tubular sheath (40) and the cup-shaped member (30) in a sealing manner, so that the internal space (63) of the tubular sheath (40) is airtight; - The cup-shaped member (30) includes at least one upper suction hole (64) which, when the cup-shaped member is in its extreme extended position, is located below the annular contact line (61) that contacts the upper sealing lip (60), so that low pressure in the internal space (63) is transmitted into the cup-shaped member (30).

2. The apparatus (10) according to claim 1, characterized in that, The tubular sheath (40) includes an elastically deformable upper sealing lip (60) having a closed annular shape, the upper sealing lip extending radially inward above the upper outlet opening (20) of the guide (14), and in a stationary state, the inner diameter (D1) of the upper sealing lip (60) is smaller than the inner diameter (D2) of the tubular body (16).

3. The apparatus (10) according to claim 2, characterized in that, At the extreme extended position of the cup-shaped member (30), the upper sealing lip (60) is radially abutted against the cylindrical wall (34) of the segment (39) of the cup-shaped member (30) in a substantially airtight manner along the annular contact line (61).

4. The apparatus (10) according to any one of claims 1 to 3, characterized in that, In a static state, the inner diameter (D1) of the upper sealing lip (60) is greater than the inner diameter (D4) of the cup-shaped member (30).

5. The apparatus (10) according to any one of claims 1 to 3, characterized in that, The upper sealing lip (60) and the tubular sheath (40) are integrally formed.

6. The apparatus (10) according to any one of claims 1 to 3, characterized in that, The tubular sheath (40) is made of plastic material.

7. The apparatus (10) according to any one of claims 1 to 3, characterized in that, The device includes an airtight member that is radially inserted between the guide (14) and the tubular sheath (40), located below the at least one slit (22, 24) for guiding the guide (14).

8. The apparatus (10) according to claim 7, characterized in that, The airtight component is a lower lip (62) with a closed annular shape, the lower lip extending radially outward from the guide (14), the lower lip (62) being tightly fitted in the tubular sheath (40) along the annular contact line.

9. The apparatus (10) according to claim 8, characterized in that, The lower lip (62) and the guide (14) are integrally formed.

10. The apparatus (10) according to any one of claims 1 to 3, characterized in that, The guide (14) includes at least one lower intake hole (66) located in a lower hub (18) disposed at the lower end of the tubular body (16) and communicating with the interior of the tubular body (16).

11. The apparatus (10) according to claim 8, characterized in that, The guide (14) includes at least one lower intake port (66) located in a lower hub (18) disposed at the lower end of the tubular body (16) and communicating with the interior of the tubular body (16); when the cup (30) occupies the extreme extended position of the cup, the tubular sheath (40) has an internal space (63) axially defined between the lower lip (62) and the upper sealing lip (60), the internal space communicating with the outside only through the upper intake port (64) and the lower intake port (66).

Images