Medical container, adapter for mounting on said medical container and drug delivery device comprising said medical container

Abstract

The medical container (1) forms a reservoir for containing a medical product and has a longitudinal distal end (11) extending along a longitudinal axis (A). The distal end (11) defines a passage in fluid communication with the reservoir. The distal end (11) includes a mating portion (113) configured to mate with a connector and a mounting portion (110) located proximally relative to the mating portion (113) and configured to slidably connect an adapter (2) to the distal end (11). The mounting portion (110) is configured to allow free longitudinal movement of the adapter (2) relative to the distal end (11) when the adapter (2) is connected to the distal end (11).

Description

Technical Field

[0001] The present invention relates to a medical container, an adapter for mounting on the medical container and a drug delivery device comprising the medical container. Background Art

[0002] In the present application, the distal end of a component or instrument is understood to mean the end farthest from the user's hand, and the proximal end is understood to mean the end closest to the user's hand. Similarly, in the present application, the "distal direction" is understood to mean the injection direction with respect to the medical container of the present invention, while the "proximal direction" is understood to mean the direction opposite to the injection direction, that is, the direction toward the user's hand holding the medical container for the injection operation.

[0003] Basically, medical containers, such as syringes, can be made of glass or plastic materials. Preferably, the medical container is made of glass because glass has high chemical inertness, low gas permeability and high transparency, which allows long-term storage and easy inspection.

[0004] Medical containers typically include a barrel that forms a reservoir for containing a medical product. The barrel has a distal end in the form of a longitudinal tip that defines an axial passage through which the medical product is discharged from the container. However, this longitudinal tip alone does not allow for parenteral administration and must include a stud or adapter that allows the syringe to be connected to a connector (e.g., a needle hub or intravenous (IV) line). The connector is typically screwed into the adapter and engages with the distal end of the medical container to establish a fluid path between the reservoir and the connector.

[0005] As is known, an adapter is securely fastened to a longitudinal end of a medical container to prevent accidental disengagement during connection of a connector to the longitudinal end or due to fluid pressure within the drug delivery device and the connector.

[0006] For example, document WO 2015 / 007650 discloses that the adapter can be secured around the longitudinal end of the syringe by snap-fit ​​or friction, for example by mechanical attachment means (such as a groove or a ring) defined on the longitudinal end.

[0007] Document WO 2016 / 198580 instead discloses providing an adapter with a mounting ring, the shape and configuration of which are arranged so that when the adapter is mounted around the longitudinal end of the drug delivery device, a circumferential space is created between the mounting ring and the longitudinal end, which circumferential space typically accommodates an adhesive layer in order to efficiently bond the adapter to the longitudinal end.

[0008] Document WO2010052517 further discloses an injection device and an adapter that allows for the safe connection of an adapter to the injection device, allowing for the further connection of an IV (intravenous) connector to the injection device. Document EP2545956 discloses a drug delivery device having an end member and an adapter for engaging around the end member so as to enable the connector to be securely connected to the end member. Document WO2012049532 discloses an adapter intended for use with a drug delivery device having an end member, the adapter having a collar that can be engaged around the member and enabling the connector to be securely connected to the collar.

[0009] However, it is also important to properly screw the connector into the adapter. Therefore, when screwing the connector into the adapter, the user must apply sufficient torque to properly fit the connector onto the distal end of the medical container. Otherwise, under-tightening or over-tightening the connector into the adapter may cause leakage or ejection of the connector due to internal pressure when transferring fluid between the container and the connector.

[0010] Yet when connector is screwed in the adapter, some connectors may abut the far side of adapter.When this contact occurs, before connector is correctly connected in the adapter, further rotation of needle hub relative to adapter produces contact between connector and adapter.

[0011] This premature contact can give the user the false impression that sufficient torque has been achieved, even though the connector is not actually properly engaged with the distal tip of the medical container. That is, if the user stops tightening, believing the connection is complete, the connector will not fully engage the distal tip, leaving a gap between the connector and the outer surface of the distal tip. This gap can lead to leakage when transferring fluid from the reservoir of the medical container to the connector.

[0012] Therefore, there is a need for a medical container that prevents the risk of incorrect fitting and leakage between the connector and the distal tip, even when the connector abuts against the distal face of the adapter when the connector is screwed into the adapter. Summary of the Invention

[0013] One aspect of the present invention is a medical container forming a reservoir for containing a medical product and having a longitudinal distal end extending along a longitudinal axis A, the distal end defining a passage in fluid communication with the reservoir, wherein the distal end comprises

[0014] a mating portion configured to mate with the connector; and

[0015] a mounting portion located proximally relative to the mating portion and configured to slidably connect the adapter to the distal tip,

[0016] Characterized in that the mounting portion is configured to allow free longitudinal movement of the adapter relative to the distal tip when the adapter is coupled to the distal tip.

[0017] Therefore, if the connector abuts the distal surface of the adapter, the medical container of the present invention allows the adapter to slide proximally along the distal tip. This prevents the tightening torque from increasing without the connector being fully engaged with the distal tip. Consequently, the user will continue to tighten the connector until it is properly engaged with the distal tip of the medical container. Thus, the risk of leakage is avoided.

[0018] In one embodiment, the mounting portion includes a guide configured to guide translational movement of the adapter relative to the distal tip and to prevent rotation of the adapter relative to the distal tip.

[0019] Translational movement is longitudinal movement along the longitudinal axis A.

[0020] In one embodiment, the guiding means comprises at least one longitudinal projection, preferably three longitudinal projections.

[0021] This allows translational movement of the adapter along the distal tip and prevents any rotation of the adapter about the distal tip. The mounting portion of the distal tip, which can be made of glass or plastic, is indeed subject to high stress when the connector is attached to the adapter. A single longitudinal projection is easier to manufacture. However, three longitudinal projections provide efficient guidance in the longitudinal direction A and efficient resistance to any rotation about the longitudinal axis A.

[0022] In one embodiment, the mounting portion has a cylindrical shape.

[0023] The mounting portion thus guides the adapter completely along the mounting portion with reduced friction.The mounting portion has a constant outer diameter.

[0024] A cylindrical shape means that the mounting portion has the shape of any straight cylinder, the base of which may be circular or polygonal, square, oval, or any other non-circular geometric shape. A mounting portion with a non-circular cross-section allows for longitudinal guidance of the adapter while preventing rotation of the adapter about the distal tip. Such a non-circular mounting portion can replace the at least one longitudinal projection to form the guide means. However, a mounting portion with a circular cross-section is easier to manufacture.

[0025] In one embodiment, the medical container comprises a blocking means configured to limit free longitudinal movement of the adapter relative to the distal tip.

[0026] In one embodiment, the blocking means comprises a distal abutment surface and a proximal abutment surface.

[0027] The distal abutment surface prevents the adapter from being removed from the distal end of the medical container and helps maintain the closure cap of the medical container by blocking the adapter in the most distal position. The proximal abutment surface blocks the adapter in the most proximal position, thereby preventing the adapter from engaging too far on the distal end. In this case, it is no longer possible to engage the external threads of the connector with the internal threads of the adapter.

[0028] In one embodiment, the distal abutment surface and the proximal abutment surface are respectively provided on the projections.

[0029] The adapter is free to move relative to the distal tip along the longitudinal axis A by a predetermined amplitude a. Free longitudinal movement means that once the adapter is pushed proximally or distally in the axial direction, the adapter slides along the tip. The predetermined amplitude a is between 0.9 mm and 1.3 mm, preferably approximately 1.1 mm, along the longitudinal axis A. In other words, the blocking device can be configured such that the amplitude a of free longitudinal movement of the adapter is between 0.9 mm and 1.3 mm, preferably approximately 1.1 mm. The larger the outer diameter of the tip, the smaller the amplitude a should be. Conversely, the smaller the outer diameter of the tip, the larger the amplitude a should be.

[0030] Another aspect of the present invention is an adapter for connecting to the aforementioned medical container, the adapter having a connecting device configured to cooperate with a complementary connecting device provided on a connector, the mounting ring for mounting the adapter to the distal end of the medical container, the mounting ring configured to slidably engage a mounting portion of the distal end.

[0031] In one embodiment, the mounting ring defines a through opening having a diameter at least equal to, or preferably greater than, an outer diameter of the mounting portion of the distal tip.

[0032] Therefore, the mounting ring does not apply radial compression to the mounting portion of the distal tip.

[0033] Preferably, the difference between the diameter of the through opening and the outer diameter of the mounting portion is between 0.1 mm and 0.3 mm, typically 0.2 mm.

[0034] In one embodiment, the mounting ring is in the form of a frustoconical disc.

[0035] The disc is angled distally relative to the tubular wall of the adapter. This reduces the insertion force while increasing the withdrawal force of the adapter.

[0036] Another aspect of the present invention is a drug delivery device comprising the aforementioned medical container and the aforementioned adapter, wherein the adapter is slidably mounted on the mounting portion of the distal tip.

[0037] The adapter is free to move relative to the distal tip along a predetermined amplitude, preferably between 0.9 mm and 1.3 mm along the longitudinal axis A.

[0038] In one embodiment, the drug delivery device further comprises a needle hub having an inner tubing configured to mate to the distal tip and outer wings configured to engage internal threads of the adapter, the needle hub comprising a ramp for guiding a user's fingers toward the pivot arm to move the pivot arm back toward a safe position in which the pivot arm covers the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention and the advantages resulting therefrom will become apparent from the detailed description given with reference to the following drawings:

[0040] - Figure 1 is a perspective view of a medical container according to one embodiment of the present invention,

[0041] - Figure 2 is a perspective view of an adapter according to an embodiment of the present invention,

[0042] - Figure 3 is a cross-sectional view of a drug delivery device according to an embodiment of the present invention,

[0043] - Figure 4A and Figure 4B is a cross-sectional view of a drug delivery device according to one embodiment of the present invention, wherein the needle hub is screwed into the adapter,

[0044] - Figure 5 is a perspective view of a needle hub for cooperating with a drug delivery device according to an embodiment of the present invention,

[0045] - Figure 6 is a cross-sectional view of a needle hub for cooperating with a drug delivery device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] refer to Figures 1 to 4B , shows a medical container 1, an adapter 2 and a drug delivery device 3 according to an embodiment of the present invention. The drug delivery device 3 is intended to cooperate with a connector such as a needle hub 40, which is Figure 5 and 6 shown.

[0047] like Figure 1As shown, the medical container 1 includes a barrel 10 that defines a reservoir for containing a medical product. A distal tip 11 defines a passage in fluid communication with the reservoir and extends longitudinally along a longitudinal axis A of the medical container 1. The medical container 1 can be made of a glass material or a plastic material. Thus, the distal tip 11 can be made by glass forming or injection molding.

[0048] The distal end 11 of the medical container 1 has a mounting portion 110. Figure 3 As shown, the mounting portion 110 is configured to receive the mounting ring 22 of the adapter 2 for connecting the adapter 2 to the distal tip 11. The mounting portion 110 preferably extends in a proximal region of the distal tip 11. More specifically, the mounting portion 110 can be closer to the distal shoulder 12 of the barrel 10 than to the distal side 112 of the longitudinal tip 11. Typically, if the distal tip 11 is divided into three equal thirds, the mounting portion 110 is disposed in the most proximal third of the distal tip 11.

[0049] The distal tip 11 further includes a mating portion 113. The mating portion 113 extends distally from the mounting portion 110. The mating portion 113 is configured to mate with the inner tubing of the needle hub 40 to establish a fluid path from the reservoir of the medical container 1 to the needle (not shown) of the needle hub 40. The mating portion 113 preferably has a frustoconical shape.

[0050] According to the invention, the mounting portion 110 of the distal tip 11 comprises guide means for guiding the longitudinal sliding movement of the adapter 2 along the longitudinal axis A and for preventing the rotational movement of the adapter 2 about said longitudinal axis A relative to the distal tip 11 .

[0051] As a result, the adapter 2 is free to move along a predetermined amplitude a relative to the distal end 11. The predetermined amplitude a is defined by the difference between the length L of the mounting portion 110 and the thickness of the mounting ring 22, as shown in FIG. Figure 3 As shown. Along the longitudinal axis A, the predetermined amplitude a may be between 0.9 mm and 1.3 mm, preferably about 1.1 mm. When the adapter 2 is mounted on the distal tip 11, the adapter 2 is free to slide along the longitudinal axis A within the predetermined amplitude a (i.e., between the most distal position and the most proximal position of the adapter 2).

[0052] This longitudinal movement of the adapter 2 relative to the tip 11 allows the distance d between the distal face 112 of the tip 11 and the distal face 24 of the adapter 2 to be varied, as in Figure 4A and 4BAs can be seen in FIG. As a result, by causing the needle hub 40 to abut against the distal surface 24 of the adapter 2, the adapter 2 can be pushed in the proximal direction, thereby increasing the distance d. This allows the distal tip 11 to properly fit into the inner tubing of the needle hub 40. Thus, the risk of leakage caused by insufficient threading of the needle hub 40 into the adapter 2 due to contact between the needle hub 40 and the distal surface 24 of the adapter 2 is avoided.

[0053] refer to Figure 1 The guide means may comprise at least one longitudinal projection 114. The at least one longitudinal projection 114 extends in a straight line parallel to the longitudinal axis A. Having a projection protruding from the outer wall of the mounting portion 110, rather than a longitudinal groove forming a recess relative to the outer wall, has the advantage of strengthening rather than weakening the mounting portion 110 and the terminal end 11.

[0054] It should be noted that the outer diameter of the mounting portion 110, excluding the projections 114, 117, 119, is equal to or smaller than, and preferably equal to, the maximum outer diameter of the mating portion 113 of the distal tip 11. In other words, the mounting portion 110 of the distal tip 11 is preferably no thinner than the rest of the tip 11. As a result, the mounting portion 110 does not have any grooves or recesses. This limits the risk of breakage, particularly when the medical container 1 is made of glass.

[0055] like Figure 1 As shown, the at least one longitudinal projection 114 may be in the form of a longitudinal rib extending completely along the mounting portion 110 .

[0056] like Figure 1 As shown, the at least one longitudinal projection 114 can have a rounded shape. The at least one projection 114 can define a concave transverse edge 115.

[0057] Preferably, the guide device may include three longitudinal projections 114. Having three longitudinal projections 114 provides a satisfactory redistribution of the screwing torque around the tip 11 to avoid breakage without complicating the manufacturing process, particularly when the tip 11 is made of glass. The three longitudinal projections 114 may be regularly distributed around the mounting portion 110. However, the guide device may have fewer or more than three longitudinal projections 114.

[0058] The mounting portion 110 is preferably cylindrical in shape. As an alternative or in addition to the at least one longitudinal projection 114, the guide means may include a mounting portion 110 having a square, oval, polygonal, or any other non-circular cross-sectional shape. Such a shape allows the adapter 2 to slide along the mounting portion 110 without rotating about said mounting portion 110.

[0059] refer to Figure 1or Figures 3 to 4B The mounting portion 110 may further include a blocking device for blocking the translational movement of the adapter 2 relative to the end 11.

[0060] The blocking means may comprise a first abutment surface 116 for blocking the adapter 2 in the distal direction accordingly. The first abutment surface 116 can also prevent the adapter 2 from being pulled out. Figure 3 ), the mounting ring 22 abuts against the first abutment surface 116.

[0061] A first abutment surface 116 defines the distal end of the mounting portion 110. The first abutment surface 116 may be disposed proximally of a first orthogonal radial projection 117. The first orthogonal radial projection 117 protrudes from the outer wall of the distal tip 11. The first abutment surface 116 is defined by the projection 117, rather than by a shoulder. The first orthogonal radial projection 117 may be in the form of a circumferential rib extending completely around the tip 11.

[0062] refer to Figure 3 The first orthogonal radial protrusion 117 may have a ramp portion 120 provided on the distal side of the protrusion 117 to facilitate the mounting ring 22 of the adapter 2 to pass over the first orthogonal radial protrusion 117 in the proximal direction. This helps the user to mount the adapter 2 on the mounting portion 110 of the tip 11.

[0063] The blocking means may comprise a second abutment surface 118 for blocking the adapter 2 in the proximal direction, respectively. Figure 4B ), the mounting ring 22 abuts against the second abutment surface 118.

[0064] A second abutment surface 118 defines the proximal end of the mounting portion 110. The second abutment surface 118 may be disposed distally of a second orthogonal radial projection 119. The second orthogonal radial projection 119 protrudes from the outer wall of the distal tip 11. The second abutment surface 118 is defined by the projection 119, rather than by a shoulder. The second orthogonal radial projection 119 may be in the form of a circumferential rib extending completely around the tip 11.

[0065] Second abutment surface 118 can be positioned so that when adapter 2 is connected to tip 11, the distance d between the distal surface of tip 11 and distal surface 24 of adapter 2 is no greater than 2.7 mm. This allows needle hub 40 to engage adapter 2 even when adapter 2 is in its proximal-most position. In fact, if distance d becomes too large, needle hub 40 will not be able to engage adapter 2. More specifically, when distal tip 11 has a high outer diameter, a maximum distance d of 2.7 mm allows the threads of needle hub 40 to engage threads 21 of adapter 2.

[0066] The blocking means may define the length L of the mounting portion 110. Figure 3 , the length L may be defined by the distance between the first abutment surface 116 and the second abutment surface 118 .

[0067] Figure 4A The needle hub 40 is shown fitted to the distal tip 11 having a first diameter, while Figure 4B The needle hub 40 is shown fitted to the distal tip 11 having a second diameter that is smaller than the first diameter. As can be seen from these figures, the sliding movement of the adapter 2 along the distal tip 11 allows the needle hub 40 to reach a predetermined position relative to the distal tip 11, in which the needle hub 40 is properly fitted to the tip 11. This predetermined position is advantageously defined as the leakage limit of the needle hub 40, as defined in ISO 80369-7 (2016) (paragraphs 6.1 and 6.2). Leakage may occur regardless of whether the needle hub 40 is insufficiently connected and does not reach this position. The sliding movement allows the needle hub 40 to reach the leakage limit position despite the possibility of contact between the needle and the distal surface of the adapter 2.

[0068] refer to Figure 2 and Figure 3 The present invention also relates to an adapter 2 configured to be connected to a mounting portion 110 of an end 11 .

[0069] The adapter 2 has a tubular wall 20 defining an inner cavity for receiving the needle hub 40. The inner cavity is provided with connecting means, such as internal threads 21, for fixing the needle hub 40 to the adapter 2.

[0070] The adapter 2 also has a mounting ring 22 protruding inwardly from the proximal end of the adapter 2. The mounting ring 22 allows the adapter 2 to be connected to the distal tip 11.

[0071] Mounting ring 22 defines a through opening 23 for receiving mounting portion 110 of distal tip 11. Through opening 23 can be shaped to complementarily engage mounting portion 110 of distal tip 11. The thickness of mounting ring 22 should be large enough to prevent adapter 2 from being pulled out, but small enough to avoid increasing the length of mounting portion 110, and thus the length of distal tip 11. For example, the thickness can be between approximately 0.6 mm and 1.4 mm.

[0072] The width or diameter of the through opening 23 may be at least equal to, and preferably greater than, the outer width or diameter of the mounting portion 110. As a result, a gap is provided between the mounting ring 22 and the mounting portion 110. This facilitates sliding movement of the adapter 2 relative to the end 11.

[0073] refer to Figure 2, the mounting ring 22 includes at least one guide window 25. The at least one window 25 is configured to engage the at least one longitudinal protrusion 114 so as to guide the sliding movement of the adapter 2 relative to the end 11 and prevent any rotation of the adapter 2 relative to said end 11. To this end, the at least one guide window 25 and the longitudinal protrusion 114 may have complementary shapes while allowing free sliding movement of the adapter 2 relative to the distal end 11. Preferably, the at least one guide window 25 and the at least one longitudinal protrusion 114 are configured so that the adapter 2 and the distal end 11 are snap-fitted. For example, the at least one guide window 25 may be slightly larger than the at least one longitudinal protrusion 114. The adapter 2 may include as many guide windows 25 as longitudinal protrusions 114, for example Figure 2 Three shown.

[0074] like Figure 2 As shown, at least one guide window 25 can open into the through-opening 23 defined by the mounting ring 22. The adapter 2 can thus be clipped onto the mounting ring 22 and the at least one longitudinal projection 114. The at least one window 25 can have a transverse edge 26 configured to engage a corresponding transverse edge 115 of the at least one longitudinal projection 114. This improves the grip of the mounting ring 22 onto the at least one longitudinal projection 114. The transverse edge 26 can be part of a snap-fit ​​arrangement for connecting the adapter 2 to the mounting portion 110.

[0075] refer to Figure 3 The mounting ring 22 of the adapter 2 can be in the form of a resilient frustoconical disc. The frustoconical shape is inclined relative to the longitudinal axis A and points in the distal direction. This increases the extraction force of the adapter 2. This can also help the adapter 2 pass over the first orthogonal radial projection 117. The inclined proximal side of the mounting ring 22 cooperates with the ramp portion 120 of the first orthogonal radial projection 117 to allow the mounting ring 22 to deform elastically. A chamfered edge 27 can further be provided on the proximal side of the mounting ring 22.

[0076] Adapter 2 can be made of any rigid polymer suitable for medical use, such as high-density polyethylene (PE), polypropylene (PP), polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polyoxymethylene (POM), polystyrene (PS), polybutylene terephthalate (PBT), polyamide (PA), and combinations thereof. To simplify its manufacture, adapter 2 is preferably constructed from a single piece of material, preferably a light-transmitting material. Adapter 2 can be manufactured by injection molding.

[0077] refer to Figure 5 and 6The present invention further relates to a drug delivery device 3 comprising the medical container 1 and the adapter 2 connected to the distal end 11 of the medical container 1. The drug delivery device 3 may be a syringe, such as a prefilled or prefillable syringe.

[0078] The drug delivery device 3 may comprise a connector, such as Figure 5 and 6 The needle hub 40 is shown. The needle hub 40 includes a proximal end portion defining an internal conduit 45 for receiving the distal end 11 of the medical container 1. The distal end portion is provided with a connection device, such as two diametrically opposed outer wings 41, which are configured to engage the connection device of the adapter 2, such as the internal thread 21, to secure the needle hub 40 to the adapter 2. The needle hub 40 also includes a distal end portion, which can be provided with a mounting port 42 for mounting an injection needle, thereby establishing a fluid path from the reservoir to the injection needle. A pivot arm (not shown) can be connected to the pivot connection 43 in the form of a hook, the pivot arm being configured to cover or expose the injection needle. To help the user move the pivot arm back toward the needle, the needle hub 40 can include a ramp 44 configured to guide the user's fingers against the pivot arm. For example, the needle hub 40 can be a BD Eclipse (registered trademark).

[0079] Thus, the present invention allows longitudinal movement of the adapter 2 relative to the distal tip 11 of the medical container 1. This axial freedom ensures a correct fit between the needle hub 40 and the distal tip 11 of the medical container 1 under all circumstances. More specifically, even when the needle hub 40 abuts the distal surface of the adapter 2, longitudinal movement of the adapter 2 relative to the distal tip 11 allows the needle hub 40 to reach a leak-limited position. This longitudinal movement of the adapter 2 relative to the distal tip 11 allows the needle hub 40 to reach a leak-limited position regardless of the diameter of the distal tip 11. Consequently, the risk of leakage due to an incorrect fit between the distal tip 11 and the needle hub 40 is avoided.

Claims

1. A medical container (1) forming a reservoir for containing a medical product and having a longitudinal distal end (11) extending along a longitudinal axis (A), the distal end (11) defining a passage in fluid communication with the reservoir, wherein the distal end (11) comprises - a mating portion (113) configured to mate with a connector; and a mounting portion (110) located proximally relative to the mating portion (113) and configured to slidably connect the adapter (2) to the distal tip (11), It is characterized by: The mounting portion (110) is configured to allow free longitudinal movement of the adapter (2) relative to the distal tip (11) when the adapter (2) is connected to the distal tip (11), wherein the mounting portion (110) includes a guide device configured to guide translational movement of the adapter (2) relative to the distal tip (11) and prevent rotation of the adapter (2) relative to the distal tip (11), The guide means comprises at least one longitudinal projection (114) configured to engage at least one guide window (25) of complementary shape of a mounting ring (22) of the adapter (2), and The at least one longitudinal projection (114) has a rounded shape and defines a concave lateral edge (115) configured to receive a lateral edge (26) of the at least one guide window (25) to allow a snap-fit ​​connection between the adapter (2) and the mounting portion (110) of the distal tip (11).

2. The medical container (1) according to claim 1, wherein The guide means comprises three longitudinal projections (114).

3. The medical container (1) according to claim 1, wherein: The mounting portion (110) has a cylindrical shape.

4. The medical container (1) according to claim 1, comprising blocking means configured to limit the free longitudinal movement of the adapter (2) relative to the distal tip (11).

5. The medical container (1) according to claim 4, wherein: The blocking device comprises a distal abutment surface (116) and a proximal abutment surface (118).

6. The medical container (1) according to claim 5, wherein: The distal abutment surface (116) and the proximal abutment surface (118) are respectively provided on protrusions (117, 119).

7. The medical container (1) according to any one of claims 4 to 6, wherein: The blocking device is configured such that the amplitude (a) of the free longitudinal movement of the adapter (2) is between 0.9 mm and 1.3 mm.

8. The medical container (1) according to any one of claims 4 to 6, wherein: The blocking device is configured such that the amplitude (a) of the free longitudinal movement of the adapter (2) is approximately 1.1 mm.

9. An adapter (2) for connecting a medical container (1) according to any one of claims 1 to 8, the adapter (2) having a connecting device and a mounting ring (22), the connecting device being configured to cooperate with a complementary connecting device provided on a connector, the mounting ring being used to mount the adapter (2) on the distal end (11) of the medical container (1), the mounting ring (22) being configured to slidably engage a mounting portion (110) of the distal end (11), wherein the mounting ring (22) comprises at least one guide window (25), the guide window being configured to engage at least one longitudinal projection (114) of a complementary shape of the mounting portion (110) so as to guide the sliding movement of the adapter (2) relative to the end (11) and to prevent any rotation of the adapter (2) relative to the end (11), and wherein The at least one guide window (25) has a transverse edge (26) configured to engage a corresponding transverse edge (115) of the at least one longitudinal projection (114) having a rounded shape, the transverse edge (26) forming a snap-fit ​​means for connecting the adapter (2) to the mounting portion (110).

10. The adapter (2) according to claim 9, wherein The mounting ring (22) defines a through opening (23) having a diameter at least equal to the outer diameter of the mounting portion (110) of the distal tip (11).

11. The adapter (2) according to claim 9, wherein The mounting ring (22) defines a through opening (23) having a diameter greater than an outer diameter of the mounting portion (110) of the distal tip (11).

12. The adapter (2) according to any one of claims 9 to 11, wherein The mounting ring (22) is in the form of a frustoconical disc.

13. A drug delivery device (3) comprising a medical container (1) according to any one of claims 1 to 8 and an adapter (2) according to any one of claims 9 to 12, wherein: The adapter (2) is slidably mounted on the mounting portion (110) of the distal tip (11).

14. The drug delivery device (3) according to claim 13, wherein: The drug delivery device (3) further comprises a needle hub (40) having an inner tubing configured to fit over the distal tip (11) and outer wings (41) configured to engage the internal threads (21) of the adapter (2), the needle hub (40) comprising a ramp (44) for guiding a user's finger towards the pivot arm so as to move the pivot arm back towards a safe position in which the pivot arm covers the needle.

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