Cartridge with locking element

Abstract

The invention relates to a cartridge (1) for storing at least two fluids and having: two fluid containers (2a, 2b), each with an outlet (3a, 3b); a base (4), which is arranged on the fluid containers and encloses the outlets; a locking element (5), which can be captively mounted on the base; wherein the base has, at least in part, an external thread (6), the locking element has, at least in part, an internal thread (7a, 7b), and the internal thread is designed to interact with the external thread, and wherein the base has a first stop (10a, 10b), which, by interacting with the second stop (11) of the locking element, prevents the locking element from unscrewing from the external thread.

Description

[0001] Cartridge with locking element

[0002] The invention relates to a cartridge for storing at least two fluids, comprising two fluid containers, each with an outlet, a base that is attached to the fluid container and accommodates the outlets, and a locking element that can be screwably attached to the base. Furthermore, the invention relates to a closure plug for use on cartridges with two fluid containers, as well as a dispensing system for fluids of a multi-component material, comprising a cartridge with two fluid containers and an attachment, in particular a mixer and / or a closure plug.

[0003] Such a cartridge or discharge system is generally used in conjunction with a static mixer to produce a material stream from two starting material streams.

[0004] For example, such cartridges contain two components of a two-component adhesive, which are introduced into a static mixer via the outlets. In the mixer, the components are mixed to a mixture as homogeneous as possible and exit the mixer as a mixture.

[0005] Static mixers are characterized by the fact that they preferably have no moving parts and the material streams to be mixed must be moved through them by means of a pump or similar device.

[0006] The document EP 2 747 899 B1 relates to a cartridge system with two containers, each having an outlet nozzle and a common connection area provided with a positioning opening for a mixer, and with a static mixer with an inlet nozzle and a positioning element, wherein the connection area has a ring surrounding the outlet nozzles and having an internal thread, and wherein the mixer has an external thread, wherein the length of the inlet nozzles, the outlet nozzles and the positioning element as well as the position of the positioning opening are coordinated with one another in such a way that when the mixer is placed on the container, the positioning element engages in the positioning opening and the internal thread and the external thread engage with one another before the inlet nozzles and the outlet nozzles touch.

[0007] It is an object of the invention to provide an improved cartridge to which an attachment can be sealingly connected. In particular, it is an object of the invention to reduce the number of individual parts of a dispensing system for fluids of a multi-component material.

[0008] This problem is solved by the teaching of the independent claims. Advantageous embodiments are claimed in the dependent claims.

[0009] A first aspect of the invention relates to a cartridge for storing at least two fluids, comprising: two fluid containers, each with an outlet; a base which is arranged on the fluid containers and surrounds the outlets; and a locking element which can be captively mounted on the base; wherein the base has an external thread at least in sections, the locking element has an internal thread at least in sections and the internal thread is designed to cooperate with the external thread, and wherein the base has a first stop which, by interacting with a second stop of the locking element, prevents the locking element from being unscrewed from the external thread.

[0010] Preferably, an outer surface of the attachment interacts with an inner surface of the locking element in the direction of the longitudinal axis of the base, preferably the two surfaces come into abutment.A second aspect of the invention relates to a dispensing system for fluids of a multi-component material, comprising a cartridge with two fluid containers, each with an outlet; a base which is arranged on the fluid containers and surrounds the outlets; a locking element which can be captively mounted on the base; and an attachment, in particular a static mixer and / or a closure plug; wherein the locking element has an opening through which the attachment can be guided in such a way that the attachment can be attached to the cartridge when the locking element is mounted on the base, and wherein the locking element, when mounted on the base, can be moved by screwing in the direction of a longitudinal axis of the base in order to sealingly connect the attachment to the outlets of the base.

[0011] A third aspect of the invention relates to a closure plug for use on double cartridges, comprising: a web that can engage in a corresponding recess on a double cartridge and thus determines an angular position during assembly of the closure plug; and a securing element that can engage in a recess of a locking element and thus prevents unlocking of the locking element, wherein the securing element has a predetermined breaking point so that it can be broken off by a user for initial unlocking.

[0012] A fourth aspect of the invention relates to a method for assembling a cartridge, comprising the following steps:

[0013] Positioning the locking element on the base in such a way that two thread ridges of the internal thread, which are arranged opposite one another with respect to a longitudinal axis of the locking element, each bear against a region of the external thread which has a reduced tooth height; and

[0014] Applying pressure to the locking element so that the two threaded ridges slide over the external thread areas. Unscrewing within the meaning of the invention is preferably a turning action.

[0015] Preventing unscrewing in the sense of the invention is preferably a blocking of a rotational movement of the locking element, so that it cannot be released from the base by a rotational movement during intended use.

[0016] The invention is based on the approach of being able to mount a locking element for locking attachments for the cartridge on the cartridge in a captive manner.

[0017] Attachments for the cartridge include a static mixer and a sealing plug.

[0018] According to the invention, the locking mechanism is secured against loss by a first stop of the base engaging a second stop of the locking element in the direction of a screwing movement when the locking element is loosened. This prevents the locking element from being unscrewed from the external thread.

[0019] Preferably, a thread groove of the external thread at the end facing away from the fluid containers is limited by the first stop.

[0020] This allows the locking element to be pre-assembled on the cartridge at the factory. This reduces the number of individual parts that need to be kept in stock by distributors, for example. Furthermore, the locking element cannot be lost when used as intended.

[0021] In an advantageous embodiment of the cartridge, the locking element, when mounted on the base, can be moved by a screwing movement in the direction of a longitudinal axis of the base in order to sealingly connect an attachment for the cartridge, in particular a mixer and / or a sealing plug, to the outlets. In a further advantageous embodiment of the cartridge, the first stop is part of the external thread and / or the second stop is part of the internal thread. If a stop is formed by part of the respective thread, no separate stop needs to be provided. This allows the construction of the respective element, in this case the base and the locking element, to be simplified. In particular, this also allows the construction of the respective injection mold to be simplified.

[0022] In a further advantageous embodiment of the cartridge, the internal thread has a projection configured to interact with a recess of a thread groove of the external thread in such a way as to generate rotational resistance when screwing the locking element. The rotational resistance serves, in particular, as haptic feedback for a user that a certain screwing position has been reached. For example, the rotational resistance can be arranged such that the haptic feedback occurs when the locking element is in a closed state.

[0023] In a further advantageous embodiment, the cartridge has a fastening element in a region facing the fluid containers for attachment to a dispensing device, in particular a dispenser. This ensures a secure hold of the cartridge in the dispensing device.

[0024] In a further advantageous embodiment, the base of the cartridge has a recess extending along the longitudinal axis of the base, into which a web of the attachment can engage. This ensures precise positioning of an attachment, in particular a static mixer or a sealing plug, along its longitudinal axis on the cartridge.

[0025] In a further advantageous embodiment of the cartridge, the external thread defines a thread groove which preferably extends over a sector of approximately 150° to 180°, more preferably of approximately 170°, and wherein the internal thread has a thread ridge which preferably extends over a sector of over 60° to 90°, more preferably of approximately 80°, wherein the thread groove and the thread ridge are coordinated in their respective extent such that the locking element can be rotated by approximately 90° for screwing. This ensures that the respective attachment can be sealingly attached to the cartridge with a rotation of the locking element of just 90° and can be removed from the cartridge again with a rotation in the opposite direction.

[0026] In a further advantageous embodiment, the thread groove narrows at least one point to clamp the internal thread. This prevents the locking element from wobbling on the cartridge, which can result in rattling.

[0027] Preferably, the threaded groove narrows at its end facing away from the fluid container. This prevents the locking element from wobbling when the locking element is in an unlocked position in which an attachment can be attached or removed.

[0028] In a further advantageous embodiment of the cartridge, the base has a third stop which, by interacting with a fourth stop of the locking element, limits a closing rotation of the locking element.

[0029] Preferably, the third stop is part of the external thread and / or the fourth stop is part of the internal thread. Furthermore, the thread groove is preferably delimited by the third stop at its end facing the fluid container.

[0030] In a further advantageous embodiment of the cartridge, the locking element is designed as a screw cap with a screw ring that is closed by a front end. The front end has an opening through which the attachment can be inserted. This allows the respective attachment to be applied to the cartridge even with the locking element pre-assembled and removed again without removing the locking element.

[0031] In a further advantageous embodiment, the locking element has a recess, particularly in the screw ring, which can interact with a securing element of the attachment, preferably in the edge of the screw ring facing the fluid containers. In a further advantageous embodiment, the internal thread has two threaded sections arranged opposite one another with respect to a longitudinal axis of the locking element, wherein teeth of two threaded sections of the external thread facing away from the fluid containers have a reduced tooth height such that the internal thread can be pushed over them. This allows the locking element to be pre-assembled on the base of the cartridge.

[0032] The advantages and features of the first aspect of the invention explained above apply accordingly to the second aspect of the invention.

[0033] In an advantageous embodiment of the dispensing system, the closure plug comprises: a web that can engage in a corresponding recess on the cartridge and thus determines an angular position during assembly of the closure plug; and / or a securing element that can engage in a recess of a locking element and thus prevents unlocking of the locking element, wherein the securing element has a predetermined breaking point so that it can be removed, in particular broken off, by a user for unlocking.

[0034] By providing a bridge on the attachment, quick installation of the respective attachment can be ensured.

[0035] The provision of the safety element prevents accidental unlocking of the locking element. It also ensures that it can be detected whether a cartridge has already been opened or not. Furthermore, the arrangement of the safety element on the closure plug allows the cartridge to be reused without damage. Alternatively, the safety element could also be arranged directly on the cartridge, but would then have to be broken off.

[0036] In a further advantageous embodiment of the dispensing system, the securing element is arranged on the web. By arranging it on the web of the closure plug, a particularly favorable positioning of the securing element with respect to the locking element can be achieved. This positioning is preferably on the edge of the locking element facing the fluid containers.

[0037] In a further advantageous embodiment, the closure plug has two pins configured to engage with cartridge outlets in such a way that a dead volume in the outlets is reduced, in particular prevented. This can prevent or reduce the occurrence of air inclusions during filling of the cartridge. This increases the quality of the filling. On the other hand, air inclusions when the cartridge is reclosed, for example, during an interruption of use by the user, can be reduced or avoided.

[0038] Preferably, the pins are conical, tapering from the main body of the closure plug toward their free end. Further preferably, the cartridge outlets are also conical, in particular, tapering toward the fluid container. Further preferably, the conicity of the pins and / or outlets is 1%.

[0039] Further features and advantages will become apparent from the following description with reference to the figures, which show, at least in part, schematically:

[0040] Figure 1: a perspective view of an embodiment of a discharge system for fluids of a multi-component material;

[0041] Figure 2: a second perspective view of the embodiment of a discharge system for fluids of a multi-component material according to Figure 1;

[0042] Figure 3: a perspective view of an embodiment of a base of a cartridge;

[0043] Figure 4: a perspective view of an embodiment of a locking element of a cartridge according to Figures 1 and 2;

[0044] Figure 5: a second perspective view of the locking element according to Figure 4;

[0045] Figure 6: another perspective view of the base according to Figure 3;

[0046] Figure 7: a partial side view of an embodiment of a cartridge; Figure 8: a perspective view of the cartridge according to Figure ? with the locking element mounted;

[0047] Figure 9: an embodiment of a closure plug for the discharge system according to Figures 1 and 2;

[0048] Figure 10: a perspective view of the cartridge according to Figure ? with the sealing plug fitted;

[0049] Figure 11: another perspective view of the cartridge according to Figure ? with the closure plug and locking element mounted;

[0050] Figure 12: a cross-sectional view through the cartridge with mounted closure plug and mounted locking element according to Figure 11;

[0051] Figure 13: a side plan view of the discharge system according to Figures 1 and 2;

[0052] Figure 14: a detail of the top view of the discharge system according to Figure 13;

[0053] Figure 15: another side plan view of the mixer shown in Figure 13;

[0054] Figure 16: a cross-sectional view through the discharge system according to Figure 13;

[0055] Figure 17: a detail of the cross-sectional view according to Figure 16; and

[0056] Figure 18: a flowchart of a method for assembling a cartridge.

[0057] Figure 1 shows an embodiment of a discharge system for fluids of a multi-component material.

[0058] Such a dispensing system is described below with reference to a two-component adhesive as a multi-component material. However, it will be obvious to those skilled in the art that the dispensing system can be used for dispensing any type of two-component material.

[0059] The dispensing system has a cartridge 1 and an attachment 8.

[0060] The attachment 8 is represented in Figure 1 by a so-called static mixer. Such a static mixer is characterized by the fact that it has no moving parts; instead, mixing is achieved by the movement of the two components through the mixer 8. Another possible attachment of the discharge system is a closure plug 9 (not shown).

[0061] These two essays 8,9 are explained in detail below.

[0062] The cartridge 1 has a first, larger fluid container 2a and a second, smaller fluid container 2b. The relative size of the fluid containers 2a, 2b results from the mixing ratio to be achieved with the dispensing system. It is therefore obvious to those skilled in the art that the sizes of the fluid containers 2a, 2b shown here are not limiting.

[0063] Furthermore, the cartridge 1 has a locking element 5, which in the illustrated embodiment is designed as a screw cap. The screw cap 5 is designed to interact with a shoulder 25 of the attachment 8. When the screw cap is screwed tight by a user, an inner surface 27 (not shown) of the screw cap 5 exerts pressure on the shoulder 25 of the mixer 8 in such a way that the mixer 8 is pressed sealingly against the cartridge 1.

[0064] The screw cap 5 has an opening 5c ​​into which the mixer s can be inserted.

[0065] The cartridge 1 shown in Figure 1 has a plate 23 between the screw cap 5 and the fluid containers 2a, 2b, which serves as a fastening element for securing the cartridge 1 in a glue gun. For the same purpose, a fastening groove 28 is preferably provided in the area of ​​the fluid containers 2a, 2b.

[0066] Furthermore, the cartridge 1 has a base 4 on which the screw cap 5 is mounted. In Figure 1, this is largely hidden behind the screw cap 5.

[0067] Figure 2 shows a top view of the discharge system from Figure 1, rotated 180°. The larger fluid container 2a is now in the foreground, and the smaller fluid container 2b is in the background.

[0068] In contrast to Figure 1, the mixer s is mounted on the cartridge 1. For this purpose, a base of the mixer 8 has been inserted into an opening 5c ​​of the screw cap 5, and the screw cap 5 is rotated 90° relative to Figure 1. During rotation, the inner surface 27 (not shown) of the screw cap 5 comes into contact with the shoulder 25 of the mixer 8 and presses it toward the base 4 and the outlets 3a, 3b (not shown) of the cartridge 1.

[0069] As a result, the mixer s comes into sealing contact with the outlets 3a, 3b (not shown) of the cartridge 1.

[0070] Figure 3 shows a first view of the base 4, which in Figures 1 and 2 is largely hidden behind the closure 5.

[0071] As can be seen in Figure 3, the base 4 surrounds two outlets 3a, 3b of the cartridge 1.

[0072] In the embodiment shown in Figure 3, the outlets 3a, 3b are part of the base 4. In addition, the base 4 has an external thread 6. This external thread 6 preferably has two thread grooves 14a, 14b, which are formed by teeth of the thread 6. At their ends, the thread grooves 14a, 14b are preferably delimited by first stops 10 in the region facing away from the fluid containers 2a, 2b and third stops 16 in the region of the thread 6 facing the fluid containers 2a, 2b.

[0073] In Figure 3, only the first stop 10b of a second threaded section 6b with the thread groove 14b and the third stop 16 of a first threaded section 6a, which delimits the thread groove 14a, are visible.

[0074] As can also be seen in Figure 3, the thread groove 14a is interrupted by a recess 13a.

[0075] Figures 4 and 5 show two detailed views of the screw cap 5 from different perspectives.

[0076] The screw cap 5 preferably has a screw ring 5a, a front end 5b, and an opening 5c. On the inside of the screw ring 5a, an internal thread 7a, 7b is provided, which is designed to cooperate with the external thread 6a, 6b of the base 4. An inner surface 26 of the front end 5b is preferably designed such that it can cooperate with a foot or shoulder 25 of the attachment 8; 9.

[0077] In the embodiment shown in Figures 4 and 5, the internal thread 7 has a first threaded ridge 7a and a second threaded ridge 7b. These each extend only over a defined sector of the screw ring 5a. Preferably, the extent of the threaded sections 6a, 6b of the external thread is coordinated such that the screw cap 5 can be rotated by approximately 90° on the base 4. The extreme positions are preferably an unlocked position of the screw cap 5 and a locked position of the screw cap 5. In the unlocked position of the screw cap 5, a second stop 11 of the threaded ridges 7a, 7b each comes into contact with the first stop 10 of the base 4. In the locked position of the screw cap 5, a fourth stop 17 of the threaded ridges 7a, 7b each comes into contact with the third stop 16 of the base 4.

[0078] Preferably, the thread grooves 14a, 14b of the external thread 6 extend over a sector of approximately 140° to 180°, preferably approximately 170°. The thread lands 7a, 7b then extend correspondingly on the inside of the screw ring 5a over a sector of approximately 60° to 90°, preferably approximately 80°.

[0079] As can be seen in Figures 4 and 5, the two threaded webs 7a, 7b each have a projection 12.

[0080] One of the two projections 12, depending on the orientation with which the screw cap 5 is applied to the base 4, interacts with the recess 13a of the first threaded section 6a of the external thread 6 when the screw cap is rotated in a defined position. In particular, the projection 12 generates a resistance, which a user can perceive as haptic feedback when rotating the screw cap 5.

[0081] Preferably, the projection 12 is arranged on one or both threaded webs 7a, 7b in such a way that the haptic feedback occurs when the screw cap reaches a locking position in which it presses the respective attachment 8; 9 sealingly against the outlets 3a, 3b in the base 4.

[0082] Furthermore, the external thread 6 preferably has two opposing regions 26a, 26b in which a tooth height of the external thread 6 is reduced. Preferably, one such region 26a, 26b is present per threaded section 6a, 6b of the external thread 6. Due to the reduced tooth height, the screw cap 5 or its threaded ridges 7a, 7b can be pressed over the external thread 6 with reduced force in this region, so that the threaded ridges 7a, 7b engage in the thread grooves 14a, 14b. This allows the screw cap 5, which is manufactured as a separate element, to be applied to the base 4. This preferably does not require any screwing movement, but merely the application of pressure in the axial direction of the base 4.

[0083] Furthermore, the screw cap 5 preferably has a recess 24, which is preferably formed on the open edge of the screw ring 5a, which faces away from the end face 5b of the screw cap 5.

[0084] Figure 6 shows a second detailed view of the base 4, which is rotated by approximately 90° compared to the view in Figure 3. Identical elements are designated by the same reference numerals.

[0085] Compared to the view in Figure 3, the third stop 16 of the threaded section 6a is now clearly visible. This view also allows a view into the recess 13 of the external thread 6 or the first threaded section 6a of the external thread. As can be seen, the recess 13 preferably forms a slot that extends through the entire base 4.

[0086] Furthermore, in Figure 6, different areas of the base 4 are marked by dashed lines and dashed arrows:

[0087] The arrow A indicates the movement of the screw cap 5 when it is pressed over the areas 26a, 26b of the thread 6a, 6b.

[0088] The arrow B indicates a screwing movement of the screw cap 5, which is stopped at the end of the arrow by the third stop 16 of the first threaded section 6a and by a corresponding stop of the threaded section 6b in a defined position.

[0089] Areas C and D indicate the teeth with reduced tooth height. The area of ​​these teeth corresponds to area 26a of the first thread section 6a.

[0090] Arrow E indicates the opposite screwing movement, which ultimately leads to the unlocking position of the screw cap 5 when it strikes the first stop of the first threaded section 6a or the first stop 10 of the second threaded section 6b. Figure 7 shows a detailed view of the cartridge 1 in the area of ​​the base 4. Here, too, the movement with which the screw cap 5 is pressed onto the base 4 is indicated by an arrow A.

[0091] In Figure 8, the screw cap 5 is applied to the base 4.

[0092] Figure 9 shows a sealing plug 9 as an attachment for the cartridge 1.

[0093] The closure plug 9 preferably has two pins 21a, 21b, which are designed to fill the outlets 3a, 3b of the fluid containers 2a, 2b, respectively. This allows dead volume in the outlets 3a, 3b to be reduced or even completely eliminated.

[0094] Furthermore, the closure plug 9 preferably has a web 15 which is designed to engage in a recess 13b of the base 4.

[0095] Preferably, a securing element 18 is attached to this web 15, which is designed to engage in the recess 24 of the screw cap 5.

[0096] Figure 10 shows the sealing plug 9 in the mounted state on the base 4 of the cartridge 1 .

[0097] The pins 21a, 21b are fully inserted into the outlets 3a, 3b. The web 15 of the sealing plug 9 is inserted into the recess 13b of the base 4. As can be seen from Figure 10, the securing element 18 protrudes beyond the base 4.

[0098] The closure plug 9 also has a foot or shoulder 25 to interact with the inner surface 26 of the screw cap 5.

[0099] Figure 11 now shows a view in which both the closure plug 9 and the screw cap 5 are in the assembled state.

[0100] The screw cap 5 assumes the locked position, and the securing element 18 is located in the recess 24 of the screw cap 5. In this position, the screw cap 5 cannot be rotated unless the securing element 18 is moved from its position. Preferably, the securing element 18 has a predetermined breaking point, so that when it is removed from the position shown in Figure 11, it breaks off from the web 15 of the closure plug 9.

[0101] Figure 12 shows a cross-section through the cartridge 1 with the sealing plug 9 installed. It should be noted that the cartridge 1 is rotated by approximately 180° compared to the views in Figures 8, 10 and 11.

[0102] As can be seen from Figure 12, the pins 21a, 21b completely fill the outlets 3a, 3b of the fluid containers 2a, 2b. The pins 21a, 21b are preferably conical, tapering from the main body of the closure plug 9 toward their free end. The outlets 3a, 3b of the cartridge are also conical, in particular, tapering toward the fluid containers. Further preferably, the conicity of the pins and / or the outlets is 1%.

[0103] Figures 13, 14, and 15 show different views of the cartridge 1 and a static mixer 8. For the general structure of the cartridge, reference is made to the description of Figures 1 and 2.

[0104] Figure 14 shows an enlargement of area A in Figure 13. There, it can be seen that the static mixer s has nozzles 22a, 22b in the region of its base 25, which are configured to engage the outlets 3a, 3b. The static mixer 8 also has a web 15 extending from the base and configured to engage the recess 13b of the base 4.

[0105] In Figures 13 and 14, the screw cap 5 is in an unlocking position so that the foot 25 of the static mixer 8 can be inserted into the opening 5c ​​of the screw cap 5.

[0106] Figure 15 finally shows a side view of the static mixer 8, with the nozzle 21b and the web 15 visible. The web 15, together with the recess 13b of the base 4, ensures the correct positioning of the static mixer 8 on the cartridge 1.

[0107] Figures 16 and 17 show two cross-sectional views of the cartridge 1 with the static mixer installed. Figure 17 represents an enlargement of area B of Figure 16. There, it can be seen how the nozzles 22a, 22b engage the outlets 3a, 3b of the fluid containers 2a, 2b. The screw cap 5 is in the closed position and presses the nozzles 22a, 22b into the outlets 3a, 3b.

[0108] Figure 18 shows an embodiment of a method 100 for assembling a cartridge 1.

[0109] Preferably, in a first work step 101, the locking element 5 is positioned on the base 4 in such a way that two thread webs 7a, 7b of the internal thread, which are arranged opposite one another with respect to a longitudinal axis of the locking element 5, each rest in a region 26a, 26b of the external thread 6, which has a reduced tooth height.

[0110] In a second step 102, a force is applied to the locking element s, causing the two threaded ridges 7a, 7b to slide over the regions 26a, 26b of the external thread 6. As a result, the threaded ridges 7a, 7b come to rest in the threaded groove 14a, 14b. This enables easy assembly of the locking element 5 to the base 4. Unscrewing the applied locking element 5 is not possible, as this is prevented by the first and second stops.

[0111] It should be noted that the embodiments described above are merely examples and are not intended to limit the scope of protection, application, or structure in any way. Rather, the preceding description provides the skilled person with a guide for implementing at least one embodiment, whereby various changes, particularly with regard to the function and arrangement of the described components, can be made without departing from the scope of protection as it results from the claims and equivalent combinations of features.

[0112] 1 cartridge

[0113] 2a, 2b Fluid container

[0114] 3a, 3b outlet

[0115] 4 bases

[0116] 5 Locking element

[0117] 6, 6a, 6b external thread

[0118] 7, 7a, 7b internal thread

[0119] 8 mixers

[0120] 9 Plugs 10a, 10b first stop 11a,11b second stop

[0121] 12 lead

[0122] 13 Recess

[0123] 14a, 14b thread groove

[0124] 15 jetty

[0125] 16 third attack

[0126] 17 fourth attack

[0127] 18 Securing element

[0128] 19 Recess

[0129] 20 predetermined breaking point

[0130] 21a, 21b cones

[0131] 22a, 22b nozzle

[0132] 23 Fastening element

[0133] 24 recess

[0134] 25 paragraph, foot

[0135] 26a, 26b area

[0136] 27 inner surface

[0137] 28 Mounting groove

Claims

Claims 1. A cartridge (1) for storing at least two fluids, comprising: two fluid containers (2a, 2b), each having an outlet (3a, 3b); a base (4) which is arranged on the fluid containers (2a, 2b) and surrounds the outlets (3a, 3b); a locking element (5) which can be captively mounted on the base (4); wherein the base (4) has an external thread (6) at least in sections and the locking element (5) has an internal thread (7a, 7b) at least in sections and the internal thread (7a, 7b) is designed to cooperate with the external thread (6), wherein the base (4) has at least one first stop (10a, 10b) which, by interacting with a second stop (11) of the locking element (5), prevents the locking element (5) from being unscrewed from the external thread (6).

2. Cartridge (1) according to claim 1, wherein the locking element (5) can be moved in the state mounted on the base (4) by a screwing movement in the direction of a longitudinal axis of the base (4) in order to connect an attachment (8; 9) for the cartridge (1), in particular a mixer (8) and / or a sealing plug (9), in a sealing manner to the outlets (3a, 3b).

3. Cartridge (1) according to claim 1 or 2, wherein the first stop (10) is a part of the external thread (6) and / or the second stop (11) is a part of the internal thread (7a, 7b).

4. Cartridge (1) according to one of the preceding claims, wherein the internal thread (7a, 7b) has a projection (12) which is arranged to cooperate with a recess (13) of a thread groove (14a, 14b) of the external thread (6) in such a way as to cause a rotational resistance when screwing the locking element (5).

5. Cartridge (1) according to one of the preceding claims, wherein the external thread (6) defines two thread grooves (14), which preferably extend over a sector of approximately 150° to 180°, more preferably of approximately 170°, and wherein the internal thread has two thread ridges (7a, 7b), which preferably each extend over a sector of approximately 60° to 90°, more preferably of approximately 80°, wherein the thread groove (14) and the thread ridge (7a, 7b) are coordinated in their respective extent such that the locking element (5) can be rotated through a defined angle, preferably approximately 90°, for screwing.

6. Cartridge (1) according to one of the preceding claims, wherein the threaded groove (14) is narrowed at least at one point, preferably at its end facing away from the fluid containers (2a, 2b), in order to clamp the internal thread (7a, 7b).

7. Cartridge (1) according to one of the preceding claims, wherein the locking element (5) is designed as a screw closure which has a screw ring (5a) which is closed by an end face (5b), wherein the end face (5b) has an opening (5c) through which an attachment (8; 9) can be guided when the locking element (5) is mounted on the base 4.

8. Cartridge (1) according to one of the preceding claims, wherein the locking element (5) has a recess (24), in particular in the screw ring (5a), preferably in the edge of the screw ring (5a) facing the fluid containers (2a, 2b), which can interact with a securing element (18) of the attachment (8; 9).

9. Cartridge (1) according to one of the preceding claims, wherein the internal thread has two separate threaded sections (7a, 7b) which are arranged opposite one another with respect to a longitudinal axis of the locking element (5), and wherein the external thread has two separate threaded sections (6a, 6b) which are arranged opposite one another with respect to a longitudinal axis of the base (4).

10. Cartridge (1) according to one of the preceding claims, wherein the external thread has two regions (26a, 26b) which have a reduced tooth height in such a way that the internal thread (7a, 7b) can be pushed over them.

11. Dispensing system for fluids of a multi-component material, comprising: a cartridge (1), in particular according to one of the preceding claims, with two fluid containers (2a; 2b) each having an outlet (3a, 3b), a base (4) which is arranged on the fluid containers (2a; 2b) and surrounds the outlets (3a, 3b), a locking element (5) which can be captively mounted on the base (4); and at least one attachment (8; 9), in particular a mixer (8) and / or a closure plug (9); wherein the locking element (5) has an opening (5c) through which the at least one attachment (8; 9) can be guided in such a way that the at least one attachment (8;9) when the locking element (5) is mounted on the base (4), it can be attached to the cartridge, and wherein the locking element (5) is movable by screwing in the direction of a longitudinal axis of the base (4) when mounted on the base (4) in order to sealingly connect the at least one attachment (8; 9) to the outlets (3a, 3b) of the base (4); 12. Discharge system according to claim 11, wherein the closure plug (9) has a securing element (18) which can engage in a recess (19) of a locking element (5) and thus prevents unlocking of the locking element (5).

13. Discharge system according to one of claims 11 or 12, wherein the securing element (18) has a predetermined breaking point (20), so that this can be removed, in particular broken off, by a user to unlock it.

14. Discharge system according to one of claims 11 to 13, wherein the Securing element (18) is arranged on the web (15).

15. Discharge system according to one of claims 11 to 14, wherein the Closure plug (9) has two pins (21 a, 21 b) which are designed to engage in outlets (2a, 2b) of the cartridge (1) in such a way that a dead volume in the outlets (2a, 2b) is reduced, in particular prevented.

16. Method (100) for assembling a cartridge (1) according to one of claims 1 to 10, comprising the following steps: Positioning (101) the locking element (5) on the base (4) in such a way that two thread webs (7a, 7b) of the internal thread, which are arranged opposite one another with respect to a longitudinal axis of the locking element (5), each bear against a region (22a, 22b) of the external thread (6) which has a reduced tooth height; and Applying (102) a force to the locking element (5) so that the two threaded webs (7a, 7b) slide over the areas (22a, 22b) of the external thread (6).

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