Injection device for injecting a pharmaceutical substance and injection loading part for such an injection device.

Abstract

The invention relates to an injection device (1) for injecting a pharmaceutical substance, comprising: - a proximal part (5) having a drive (7) for effecting an injection, and - a distal part (13) configured to receive an injection loading part (3) having a packaging receiving part (17) and a primary packaging (23) held in the packaging receiving part (17) in which a pharmaceutical substance is contained, wherein the pharmaceutical substance can be injected from the injection loading part (3) when the injection loading part (3) is arranged in the distal part (13), wherein - the distal part (13) is configured such that the injection loading part (3) can be inserted axially into the distal part (13), and wherein - the injection device (1) has a visual shield (15) which is configured and arranged such thatthat an injection needle (25) of the injection loading part (3) is concealed from a user during an application of the injection device (1).

Description

[0001] The invention relates to an injection device for injecting a pharmaceutical substance and an injection loading part for use in such an injection device.

[0002] Injection devices of the type discussed here are used, in particular, for one-time or repeated injection of a pharmaceutical substance. In a particularly simple configuration as a conventional pen, they can have a drive device to which a carpule can be attached in an exchangeable manner. An injection needle can in turn be connected to the carpule. A piston in the carpule can be displaced by the drive device in order to carry out an injection and expel the pharmaceutical substance via the injection needle. The injection needle is visible to a user when using the pen. This can lead to psychological and / or physical defensive reactions and ultimately negatively affect compliance with a treatment plan. Such a pen can be reused by separating an empty cartridge from the drive device and replacing it with a fresh cartridge. It is also possible that a pen is provided for a single injection, the entire pen, including the drive device, being disposed of after the injection. Such a pen is constructed integrally. It is therefore not adaptable to different primary packaging for pharmaceutical substances or has to be newly developed for each application. In addition, the use of such a disposable pen is expensive and is therefore only considered for high-priced pharmaceutical substances. With the Bayer BETACONNECT®<, an injection device has become known into which a specifically designed syringe can be loaded. The injector is reusable and has a privacy shield so that an injection needle of the syringe loaded in the injector is hidden from a user during use. The injection device is relatively complicated to use, with the syringe having to be introduced into the device in particular by opening it up and inserting it from the side; In addition, this injection device - as stated - is set up for use with a specific type of syringe and therefore cannot be used with other primary packaging materials.

[0003] The invention is based on the object of creating an injection device and an injection loading part for such an injection device, in which case the disadvantages mentioned do not occur.

[0004] The object is achieved by providing the present technical teaching, in particular the teaching of the independent claims and the embodiments disclosed in the dependent claims and the description.

[0005] The object is achieved in particular by creating an injection device that is set up for injecting a pharmaceutical substance. The injection device has a proximal part that has a drive that is set up to bring about the injection. The injection device also has a distal part which is set up to receive an injection loading part which has a packaging means receiving part and a primary packaging means held in the packaging means receiving part. A pharmaceutical substance is accommodated in the primary packaging means, the pharmaceutical substance being injectable from the injection loading part when the injection loading part is arranged in the distal part. The distal part is designed in such a way that the injection loading part can be introduced axially into the distal part. The injection device has a privacy screen which is designed and arranged in such a way that an injection needle of the injection loading part is hidden from a user during use of the injection device. With the proximal part and the distal part, the injection device has a simple and, in particular, clearly structured design: In particular, a functional separation is provided between the proximal part and the distal part, with the drive being provided in the proximal part and the distal part serving to accommodate the injection loading part. As a result, the distal part can be designed in a simple and cost-effective manner compared to the proximal part, which ultimately also reduces the overall complexity and the overall costs in the manufacture of the injection device. Depending on the specific configuration, a known proximal part, i.e. a drive device, of a conventional pen can also be used, which is supplemented by the distal part, so that the injection device can be provided particularly easily and with little development and / or production effort is. In addition, the injection device is easy to operate and its function is also easy for the user to understand.

[0006] The fact that the distal part is set up to accommodate the injection loading part, which in turn accommodates the primary packaging means, means that the injection device can be easily adapted to different primary packaging means. All that is required is an adaptation of the injection loading part to the corresponding primary packaging means such that the primary packaging means can be accommodated in the injection loading part and the injection loading part can be accommodated in the distal part. The injection device can therefore be flexibly adapted to different applications.

[0007] In a preferred configuration, the injection device, in particular the distal part and the proximal part, is set up for repeated injection of a pharmaceutical substance, it being possible for it to be designed as a reusable injection device and in particular to be rechargeable. In particular, the distal part and the proximal part are designed as parts that can be used several times. A spent injection charger can then be easily replaced with a fresh injection charger. The injection loading part is preferably designed as a disposable part.

[0008] However, the injection device can also be used for a single injection of a pharmaceutical substance. In particular, it can then be disposed of together with a used injection charger. Nevertheless, the advantage remains that due to the multi-part structure with the proximal part, the distal part and the injection loading part, a simple adaptation to different primary packaging means and thus different application options is possible.

[0009] The visual protection advantageously makes it possible for the user of the injection device not to see the injection needle, so that associated physical and / or psychological defense reactions are avoided. Therefore, compliance associated with the use of the injection device is also high.

[0010] Advantageously, the visual protection is at the same time a puncture protection, so that the injection needle remains hidden from the user not only visually but also haptically while the injection device is being used. This avoids unwanted puncture injuries apart from the actual injection to be carried out when using the injection device.

[0011] A visual protection means in particular a device or an element that is set up and arranged to hide the injection needle from view in particular, but preferably also from unintentional contact by the user.

[0012] The fact that the injection needle is hidden from the user while the injection device is being used means, in particular, that the injection needle cannot be used while the injection is being carried out, preferably while the injection loading part is being loaded into the distal part and during the injection, particularly preferably also while the injection loading part is being unloaded. is hidden from view and preferably also from unwanted contact of the user.

[0013] In a preferred embodiment, the visual protection does not prevent the user from being able to observe the progress of the injection or the filling level of the primary packaging material. In particular, a viewing window is preferably formed in a peripheral wall of the distal part, through which the user can observe the progress of the injection and / or the filling level of the primary packaging means, in particular while an injection is being carried out.

[0014] A pharmaceutical substance is to be understood in particular as meaning a substance or mixture of substances which produces a pharmaceutical or medical effect and / or which is / are injected for a pharmaceutical and / or medical purpose. Such a pharmaceutical substance can in particular have at least one active substance and / or auxiliary substance, in particular at least one medicament.

[0015] Here and in the following, "proximal" refers in particular to a direction in the coordinate system of the injection device and / or the injection loading part which is intended to face away from an injection point at which an injection is to be carried out with the injection device. Correspondingly, “distal” refers to a direction in the coordinate system of the injection device and / or the injection loading part, which is intended to face the injection site. Correspondingly, the proximal part of the injection device faces away from the injection site when it is used as intended, with the distal part facing the injection site when it is used as intended.

[0016] The proximal part is in particular a back end of the injection device. In particular, it can also be a conventional backend of an injection pen, which is known per se.

[0017] The distal part is in particular a front end of the injection device.

[0018] The distal part is mechanically connectable or connected to the proximal part. In a preferred embodiment, it is possible for the distal part to be designed in one piece with the proximal part.

[0019] The drive is preferably designed as a mechanical drive or as an electrical drive. A mechanical drive is in particular a drive that can be operated manually by a user. The drive is preferably set up to bring about the injection automatically, in particular as an electric drive. In a preferred embodiment, the proximal part has a control device that is set up to control the drive for effecting the injection.

[0020] The fact that the drive is set up to bring about the injection means in particular that activating the drive can cause the pharmaceutical substance to be expelled and thus cause an injection.

[0021] The injection loading part is in particular a part that can be inserted into the distal part and preferably removed from the distal part, which carries the primary packaging means and thus the pharmaceutical substance. In particular, it is preferably possible that the injection loading part can be exchangeably received in the distal part.

[0022] The primary packaging means is set up in particular to directly accommodate the pharmaceutical substance in its interior. In particular, the primary packaging means is preferably designed as a syringe or as a cartridge. The primary packaging means preferably carries the injection needle, which is arranged in particular at a distal end of the primary packaging means and can be connected to the primary packaging means in particular in a detachable or non-detachable manner.

[0023] The distal part preferably has a distinct direction of extent, its extent in the distinguished direction of extent being longer than the extent in the two directions perpendicular to the distinguished direction of extent. This distinguished direction of extension is referred to as the axial direction. The distal part is thus designed to be elongated, in particular along the axial direction. The term "axial" refers in particular to this axial direction. A circumferential direction encompasses the axial direction concentrically. A radial direction is perpendicular to the axial direction.

[0024] The fact that the injection loading part can be introduced axially into the distal part preferably means in particular that it can be introduced into the distal part in the axial direction, in particular on the front side, and preferably also removed from the distal part.

[0025] According to a development of the invention, it is provided that the injection device has the drive of the proximal part as the only drive. In particular, preferably no further drive is provided, regardless of a possible purpose of this further drive. The drive of the proximal part preferably acts on a piston rod of the injection device in order to displace the piston rod in the axial direction, in particular to expel the pharmaceutical substance from the injection loading part, and in the opposite direction to move the piston rod back after the injection has been carried out. The injection device is preferably set up in such a way that at least one other mechanical function of the injection device is brought about by the displacement of the piston rod. The drive thus serves at least one additional functionality in addition to actually effecting the injection. This represents a particularly economical and simple configuration of the injection device.

[0026] The at least one further mechanical function is preferably selected from a group consisting of: puncturing the injection needle into the injection site under the privacy screen; a locking of the injection loading part and / or the sight protection, in particular in an injection position for effecting the injection or in a rest position in order to prevent an unwanted injection; and an unlocking of the injection loading part and / or the sight protection, in particular to enable the injection needle to be inserted into the injection site.

[0027] According to a development of the invention, it is provided that the injection device is designed as a pen or as an auto-injector. The injection device is thus designed in a manner that is already known from other, conventional injection devices, and their operation is also fundamentally known. A user will therefore not have any major difficulties using the injection device. In particular, the injection device is set up for self-injection of the pharmaceutical substance by a patient, so that advantageously no medical specialist is required to use the injection device.

[0028] On the one hand, the further developments and preferred configurations disclosed below further develop the invention independently of one another; on the other hand, they form a first preferred exemplary embodiment of the invention, preferably in combination with one another. According to a development of the invention, it is provided that the distal part is detachably connected to the proximal part. In this way, the distal part and the proximal part can advantageously be handled and manipulated independently of one another. In particular, it is possible in this way to use a conventional backend for a conventional pen to provide the injection device, and to provide the injection device by connecting the backend, which is known per se, to the distal part configured according to the invention. In this case, the distal part can be connected to the back end, in particular instead of a carpule which is conventionally to be connected to the back end. However, it is of course also possible for the proximal part to be specially designed and provided for the injection device according to the invention.

[0029] If the distal part is detachably connected to the proximal part, it can in particular be separated from the distal part. Such a separation of the distal part from the proximal part can be provided in particular for introducing the injection loading part into the distal part and / or for maintenance or repair purposes.

[0030] The injection device preferably has a connection mechanism which is set up to releasably connect the distal part to the proximal part. According to a preferred embodiment, the connection mechanism can be designed as a plug-in / rotary connection, in particular as a bayonet lock.

[0031] Alternatively, however, it is also possible for the distal part to be permanently connected to the proximal part. In this case, the term "unsolvable" means in particular that the distal part cannot be separated from the proximal part without being destroyed or at least not without the use of force.

[0032] According to a development of the invention, it is provided that the visual protection is provided or arranged rigidly on the distal part. In this case, the visual protection cannot be displaced relative to the distal part. The visual protection is preferably formed in one piece, preferably of the same material, with the distal part. In a particularly preferred embodiment, the privacy screen is formed by the distal part. This means in particular that the distal part itself represents the visual protection at least in certain areas. In a particularly simple and functionally reliable manner, the injection needle remains hidden from the user's view through the distal part, with the distal part preferably also preventing the user from accidentally touching the injection needle. The distal part also serves as a stab protection.

[0033] According to a development of the invention, it is provided that a proximal end face of the distal part has a loading opening through which the injection loading part can be introduced into the distal part. The loading opening is thus arranged and set up in such a way that it allows the injection loading part to be inserted into the distal part. The injection loading part is inserted into the distal part from a side intended to be remote from the injection site. In analogy to the conceptual description of firearms, the injection device according to this exemplary embodiment is designed as a breech loader.

[0034] In order to be able to introduce the injection loading part into the distal part, the distal part is preferably detached from the proximal part so that the proximal end face of the distal part is accessible. In this configuration, the distal part is therefore preferably releasably connected to the proximal part.

[0035] According to a development of the invention, it is provided that a spring device is arranged in the distal part, against which the injection loading part rests, and against the spring force of which the injection loading part in the distal part can be displaced in the distal direction to carry out an injection when the injection loading part is arranged in the distal part is. In order to carry out an injection, the injection loading part is thus displaced within the distal part and relative to the distal part in the direction of the injection site. In a preferred embodiment, to carry out the injection, a distal end face of the distal part is placed on the patient's skin in the area of ​​the injection site, and the injection loading part is displaced within the distal part and relative to it in the distal direction, so that the injection needle penetrates the patient's skin. and the injection can be carried out. The injection loading part is then pushed back again by the spring force of the spring device, so that the injection needle is also completely arranged inside the distal part again. The distal part serves as a visual protection, preferably at the same time as a puncture protection.

[0036] The spring device is preferably supported with a distal end on a shoulder of the distal part, while the injection loading part bears against a proximal end of the spring device. In a preferred embodiment, the spring device is designed as a spring, in particular as a helical spring.

[0037] The displacement of the injection loading part within the distal part is preferably effected by the piston rod of the proximal part and thus at the same time by its drive.

[0038] In particular, the injection loading part is displaceable in the distal part between a protective position in which the injection needle is arranged completely within the distal part and an injection position in which the injection needle protrudes beyond the distal end face of the distal part and in which the injection is carried out. In order to carry out the injection, the injection loading part is shifted from the protective position in the axial direction against the spring force of the spring device into the injection position. After the injection has been carried out, in particular when the piston rod is pulled back, the spring device forces the injection loading part back out of the injection position into the protective position.

[0039] According to a development of the invention, it is provided that the injection device has a locking part that can be inserted into the distal part through the loading opening of the distal part and is set up to rest against a proximal contact surface of the injection loading part. The locking part has a base body and at least one locking element pivotably articulated on the base body. The locking part can be displaced within the distal part in particular between a first axial position, also referred to as the unlocking position, and a second axial position, also referred to as the locking position. In the first axial position, the locking member is spaced from a latch aperture formed in a peripheral wall of the distal member. In the second axial position, the locking part is arranged at the level of the bolt opening. If the locking part is arranged in the first axial position, the locking element is pivoted into the base body. If the locking part is arranged in the second axial position, the locking element can be swiveled out and in particular reach through the locking opening in order to block an axial displacement of the injection loading part--relative to the distal part. This advantageously prevents the injection needle from penetrating too deeply into the patient's body, unless this is already prevented by the spring device, in particular a blocking of the spring device; on the other hand, it also prevents the injection loading part from being pushed back too far in the direction of the protective position by the force of the spring device during the injection, as a result of which the injection needle would otherwise not penetrate deep enough into the patient's body or could slide out of the injection site entirely . Advantageously, the locking by the locking element thus preferably prevents an axial displacement of the injection loading part while the injection is being carried out, both in the distal and in the proximal direction. It is possible for the locking element and the locking opening to be matched to one another in such a way that there is a certain tolerance with regard to an axial displacement of the injection loading part within the distal part, with the locking opening in particular having axial stops - both in the proximal and in the distal direction - for the Locking element provides. A possible axial displacement of the injection loading part during the injection is thus limited by the bolt opening.

[0040] The at least one locking element is preferably L-shaped. In particular, the L-shaped locking element has two legs connected to one another, preferably formed in one piece and / or of the same material, it being preferably articulated to the base body of the locking part in a connecting region of the two legs.

[0041] The locking part is preferably attached to the proximal part. Advantageously, it cannot be lost when the distal part is separated from the proximal part, in particular in order to insert the injection loading part into the distal part. However, it is also possible for the locking part to be present as a separate element. In this case, in order to introduce an injection loading part into the distal part, the locking part is preferably manually removed from the distal part; the injection loading part is inserted into the distal part, and then the locking part is reinserted—also via the proximal loading opening—into the distal part.

[0042] A plurality of locking elements are preferably articulated pivotably on the base body of the locking part, in a particularly preferred embodiment two locking elements. The locking elements are preferably articulated on the base body evenly, viewed in the circumferential direction, that is to say at equal angular distances from one another. If two locking elements are provided, they are preferably diametrically opposed. In the peripheral wall of the distal part, there are preferably at least as many locking openings as the locking part has locking elements, preferably exactly as many, with the position of the locking openings viewed in the circumferential direction preferably being matched to the position of the locking elements, so that the locking elements fit into the locking openings in the locking position can intervene. In a particularly preferred embodiment, two diametrically opposite locking openings are provided in the peripheral wall of the distal part.

[0043] According to a development of the invention, the locking part has an axial passage opening for the piston rod, the locking part being designed in such a way that the at least one locking element engages in the passage opening in the first axial position, so that the passage opening for the piston rod is blocked and the locking part is blocked from the piston rod is displaceable - in particular together with the injection loading part and thus at the same time the primary packaging means - with the locking element releasing the reach-through opening in the second axial position, so that the piston rod can reach through the reach-through opening and can be displaced relative to the locking part, in particular around a piston of the primary packaging means within the To shift primary packaging and relative to the injection needle, so that the pharmaceutical substance is expelled from the primary packaging. The locking element thus provides a stop for the piston rod in the unlocked position, so that the piston rod can displace the locking part and the injection loading part together in the distal direction until the locking part reaches the second axial position and thus the locking position. The locking element can now pivot out and is pivoted in particular by the piston rod in such a way that it reaches through the locking opening, while at the same time releasing the access opening, so that the piston rod can reach through the locking part past the locking element and act on the piston of the primary packaging means. In particular, the L-shaped locking element engages in the reach-through opening with an inner leg of its two legs in the unlocked position, so that the piston rod strikes the inner leg. If the locking part reaches the area of ​​the bolt opening, an outer limb of the two limbs can reach through the bolt opening, with the inner limb pivoting out of the reach-through opening and thus freeing the path for the piston rod through the reach-through opening. If the plunger rod is withdrawn from the access opening after the injection has been completed, the locking part is pushed in the proximal direction by the force of the spring device, with the locking element being able to pivot back into the base body. It then no longer reaches through the latch opening, and the locking part can be displaced in the proximal direction together with the injection loading part.

[0044] This is where those developments and preferred configurations that preferably form the first exemplary embodiment in combination with one another end.

[0045] On the one hand, the further developments and preferred configurations disclosed below further develop the invention independently of one another; On the other hand, they form a second preferred exemplary embodiment of the invention, preferably in combination with one another. In particular, the shield is movable between a rest position and an exposure position, in the rest position it hides the injection needle as long as no injection is being performed, while in the exposure position it exposes the injection needle for the injection. The privacy screen can be moved in particular in the axial direction. The privacy shield preferably has a preferably radial projection on its outer peripheral surface, with which it strikes a distal end face of the distal part or an adjustable stop in an extreme exposure position, ie with the greatest possible displacement in the proximal direction. In this way, the shifting of the privacy screen in the proximal direction is advantageously limited.

[0046] The privacy screen is preferably pretensioned in the rest position, it being displaceable against the pretension from the rest position into the exposure position. For this purpose, the distal part preferably has a prestressing device that is set up to prestress the privacy screen into the rest position. The pretensioning device is preferably designed as a helical spring arranged in the distal part, which interacts with the sight protection and forces it into the rest position.

[0047] The privacy shield is preferably shifted to the exposure position when the injection device is placed on a patient's body and urged against the patient's body to perform an injection. At the same time as the screen is moved to the exposure position, the injection needle can penetrate the patient's body. The injection needle remains hidden from the user's view at all times, since the part of the injection needle that has not penetrated the patient's body is always covered by the privacy screen.

[0048] In the configuration of the injection device in which the sight protection is held displaceably on the distal part, it is possible in particular for the distal part to be non-detachably connected to the proximal part, as explained above in connection with the first exemplary embodiment. However, it is also possible for the distal part to be detachable from the proximal part, in particular for repair or maintenance purposes, as is also explained above.

[0049] According to a development of the invention, it is provided that a distal end face of the distal part has the loading opening through which the injection loading part can be introduced into the distal part. In this case, the injection loading part is inserted into the distal part from the side intended to face an injection site. In this respect, the injection device is designed as a kind of muzzle loader. In particular, the injection loading part is preferably introduced into the distal part through the sight protection.

[0050] The injection loading part can preferably be screwed, in particular screwed, into the distal part. For this purpose, the distal part on the one hand and the injection loading part on the other hand each have complementary screw means. Particularly preferably, at least one thread is formed in the distal part, in particular a right-hand thread, with a screw-in projection being arranged on the injection loading part in a particularly simple configuration, which is designed to interact with the thread in a form-fitting manner and to be screwed into the thread. There is then no need for a separate formation of a thread on the injection loading part, so that this can be of particularly simple construction. Two such threads are preferably arranged in the distal part, with the injection loading part correspondingly having two screw-in projections at the same time.

[0051] As an alternative or in addition, the injection loading part can preferably be arranged in an axially fixed manner in the distal part. A secure and stable axial position for the injection loading part in the distal part can thus be provided, with the injection loading part being held axially fixed relative to the distal part in the latter. In particular, the at least one thread turn can have a thread run-out, which defines the axial position of the injection loading part. Alternatively, it is possible for the distal part and the injection loading part to have a fixing mechanism, for example in the manner of a bayonet lock.

[0052] According to a development of the invention, it is provided that the distal part has a sight protection locking mechanism which is set up to lock, preferably lock, the sight protection in a locked position - against axial displacement, in particular against displacement between the rest position and the exposure position, and release the relocation of the privacy screen in a release position. Advantageously, the sight shield locking mechanism can prevent the sight shield from being inadvertently moved into the exposure position and thus exposing the injection needle outside of an injection being carried out. An unwanted sight of the injection needle or - even worse - an unwanted prick injury by the injection needle can / can be avoided in a particularly safe way.

[0053] The sight protection locking mechanism is preferably set up to be unlocked when the injection loading part is introduced, in particular when it is screwed in or screwed into the distal part. In particular, it is set up to be unlocked by inserting, in particular screwing in or screwing in, the injection loading part into the distal part. "Unlocking" means that the shifting of the privacy screen from the rest position to the exposure position is released. Accordingly, in a simple manner and without additional effort for the user, the corresponding shifting of the visual protection can be released by inserting the injection loading part into the distal part as intended.

[0054] Alternatively or additionally, the privacy screen locking mechanism is preferably set up to be locked by the piston rod associated with the drive. In this way, the visual protection can advantageously be blocked again—automatically—without further, additional intervention by the user when performing an injection or after performing an injection. The sight protection locking mechanism is preferably locked by axial displacement of the piston rod in the distal direction, ie when the injection is carried out. In this way, an accidental prick injury after performing the injection is very reliably prevented, when typically the user's attention is less than before performing the injection.

[0055] According to a further development of the invention, it is provided that the sight protection locking mechanism has a rotary disc which is arranged in the distal part so that it can rotate about the longitudinal axis of the distal part between the locked position and the release position, the rotary disc having at least one through-hole, the rotary disc with the at least a through-hole is set up and arranged in such a way that a blocking projection of the privacy screen can be displaced through the through-hole in the release position, the blocking projection in the blocked position striking the turntable, in particular from the distal side. The turntable provides a simple and functionally reliable lock for the privacy screen. If the turntable is arranged in the locked position, the through-hole is in particular turned away from the locking projection in such a way that it cannot be displaced through the through-hole and therefore strikes the turntable so that the privacy screen cannot be moved from the rest position to the exposure position . In the release position, on the other hand, the turntable with the at least one through-hole is pivoted in such a way that it opens up a displacement path for the locking projection, so that it can pass through the through-hole. The screen can then be shifted from the rest position to the exposure position, with the result that an injection can be carried out.

[0056] The passage recess is preferably designed as an open-edged recess in the turntable, in particular as a radial recess area on an outer circumference of the turntable.

[0057] The blocking projection is preferably ramp-shaped—sloping in the distal direction—and arranged on a spring tongue or part of the spring tongue. This has the advantage that the privacy screen can also be shifted from the exposed position back to the rest position when the turntable is arranged in the locked position. For example, if the privacy screen locking mechanism - here the turntable - is displaced from the release position to the locked position by the piston rod during its axial displacement, this typically occurs while the privacy screen is still arranged in the exposure position. In particular, when the injector is subsequently removed from a patient's skin, the privacy shield is urged from the exposure position back to the rest position. The blocking projection can then pivot radially outwards against a prestressing force of the spring tongue of which it is a part or on which it is arranged, and thus slide past the turntable, in particular an outer peripheral line of the turntable, in particular due to its ramp-shaped design. Conversely, however - precisely because of the ramp-shaped or wedge-shaped design of the blocking projection - it cannot slide past the turntable in the blocking position if an attempt is made to shift the privacy screen from the rest position to the exposure position. In particular, the ramp-shaped design of the locking projection on the spring tongue allows it to pass from the proximal side of the rotary disc to its distal side when the rotary disc is in the locked position, but not in the opposite direction.

[0058] In the distal part, at least two latching positions are preferably provided for the rotary disk, with the rotary disk engaging in one of the latching positions in particular in the blocked position on the one hand and in the release position on the other hand and thus being held securely with regard to its angular position.

[0059] According to a development of the invention, it is provided that the rotary disc has at least one driving surface which is designed to interact with a driver of the injection loading part, so that the rotary disc is rotated from the blocked position into the release position when the injection loading part is screwed into the distal part, in particular screwed becomes. This represents a simple and functionally reliable way of actuating the turntable through the injection loading part when screwing in the injection loading part.

[0060] The at least one driver surface is preferably formed on a driver projection, which extends on the rotating disk and, starting from an end face of the rotating disk, in the axial direction, in particular in the distal direction. The carrier is designed in a complementary manner, preferably as a carrier projection on the injection loading part, in particular on the functional sleeve, wherein it extends in particular starting from a distal end face of the injection loading part in the proximal direction.

[0061] Preferably, the driving surface and the driver together form a claw coupling.

[0062] The turntable preferably has two driving surfaces, in particular two driving projections, which are particularly preferably diametrically opposite one another. Correspondingly, the injection loading part preferably has two carriers, one of the carriers each interacting with one carrier surface of the turntable.

[0063] Alternatively or additionally, the rotary disk preferably has at least one run-off surface on which an actuation structure of the piston rod can run such that the rotary disk is rotated from the release position into the locked position when the piston rod is moved in a specific direction, i.e. proximally or distally - axially is displaced relative to the turntable. In this way, the displacement of the turntable from the release position to the locked position can be actuated by the piston rod in a simple and functionally reliable manner. The actuating structure is preferably designed as an actuator projection or actuator pin, with the actuator projection or actuator pin extending radially outwards in the radial direction, starting from an outer peripheral surface of the piston rod.

[0064] The rotary disc preferably has two such run-off surfaces, with the piston rod having two actuation structures, with each actuation structure interacting with one of the run-off surfaces. The drain surfaces and correspondingly the actuation structures are preferably arranged diametrically opposite each other.

[0065] In particular, the at least one run-off surface is designed such that the turntable is rotated when the piston rod with the actuating structure is axially displaced relative to the turntable in the distal direction, in particular when the actuation structure runs, in particular slides, in the distal direction along the run-off surface. This means in particular that the rotary disk is preferably rotated from the release position into the locked position when an injection is effected by the piston rod and the pharmaceutical substance is expelled from the injection loading part.

[0066] In the circumferential direction next to the at least one run-off surface, a through-window is preferably arranged, through which the actuating structure can pass in the event of a reverse axial displacement of the piston rod, without displacing the turntable. In particular, the actuation structure can pass through the through window when the piston rod is axially displaced in the proximal direction relative to the rotary disc. A rotation of the rotary disk in the event of opposite axial displacement of the piston rod, in particular proximal displacement of the piston rod, is thus avoided. Thus, in particular, the functions of locking on the one hand and unlocking on the other hand are separated with respect to the turntable: the turntable is unlocked when the injection loading part is screwed in, ie rotated from the locked position to the release position; it is locked, ie rotated from the release position to the locked position, when the piston rod is axially displaced relative to the rotary disc in the specific direction, in particular in the distal direction.

[0067] According to a development of the invention, it is provided that the injection device, in particular the distal part, has an adjustable stop for the movable privacy screen. The privacy screen preferably strikes the adjustable stop in the exposure position. The depth of penetration of the injection needle into the body of a patient can advantageously be set, in particular predetermined, by means of the adjustable stop. If the adjustable stop is designed so that the sight shield hits the adjustable stop in the exposure position, the position of the sight shield can be changed directly relative to the distal part during the injection, which obviously affects the penetration depth of the injection needle.

[0068] This is where those developments and preferred configurations that preferably form the second exemplary embodiment in combination with one another end.

[0069] The object is also achieved by creating an injection loading part which is set up for use in an injection device according to the invention or in an injection device according to one of the exemplary embodiments described above. The injection loading part has a packaging means receiving part in which a primary packaging means is held, wherein a pharmaceutical substance is arranged in the primary packaging means. In particular, the injection loading part is designed to be accommodated in the distal part of the injection device. In connection with the injection loading part, there are in particular the advantages that have already been explained in connection with the injection device.

[0070] The injection loading part is preferably designed in the way that has already been explained explicitly or implicitly in connection with the injection device.

[0071] According to a development of the invention, it is provided that the packaging receiving part has a functional sleeve and a securing part, the primary packaging being accommodated in the functional sleeve and the primary packaging being secured, preferably fixed, by the securing part in the functional sleeve. The functional sleeve is preferably designed to guide and hold the injection loading part in the distal part of the injection device. Alternatively or additionally - in particular in connection with the second exemplary embodiment - the functional sleeve is set up to unlock the sight protection locking mechanism. Alternatively or additionally, the functional sleeve is preferably set up to release a needle protection part for manual removal when the injection loading part is or will be arranged in the distal part.

[0072] The fact that the primary packaging is received and secured in the functional sleeve means in particular that the primary packaging is held in the functional sleeve. This in turn means in particular that the primary packaging means cannot fall out of the functional sleeve or be unintentionally released from the functional sleeve or separated from the functional sleeve.

[0073] The securing part is preferably designed as a clamping ring, a clip part or a clip ring which is clamped or clipped to the functional sleeve when the primary packaging means is arranged in the functional sleeve in order to secure, in particular to fix, the primary packaging means in the functional sleeve.

[0074] According to a development of the invention, it is provided that the injection loading part has a needle protection part that is detachably connected to the functional sleeve and conceals an injection needle of the primary packaging means when the needle protection part is connected to the functional sleeve. This has the advantage that the injection needle is also hidden when the injection loading part is not arranged in the distal part of the injection device. In order to carry out an injection, the needle protection part must be detached from the functional sleeve, in particular it must be pulled off the functional sleeve.

[0075] The fact that the needle protection part is detachably connected to the functional sleeve means in particular that it is directly connected to the functional sleeve and / or that it is indirectly connected to the functional sleeve via the primary packaging means. It can also be connected directly to the primary packaging. However, since this in turn is connected to the functional sleeve, the needle protection part is then also at least indirectly connected to the functional sleeve.

[0076] The fact that the needle guard hides the injection needle means, in particular, that it hides this optically and haptically in such a way that a user does not see the injection needle, and accidental puncture injuries by touching the injection needle are also prevented, since the injection needle is not accessible visually and haptically , when the needle guard is connected to the functional sleeve.

[0077] According to a development of the invention, it is provided that the needle protection part has an outer gripping sleeve and an elastic protective element arranged inside the gripping sleeve so that it can be carried along. The injection needle is accommodated in the elastic protection element when the needle protection part is connected to the functional sleeve. The protective element can in particular be made of or consist of pharmaceutical rubber or a similar material. A user can grip the needle guard on the outer grip sleeve and pull it off the functional sleeve if he wants to carry out an injection. The needle guard with the outer gripping sleeve preferably protrudes from the distal part and, in particular, also protrudes beyond the sight protection when the injection loading part is accommodated in the distal part, so that a user can easily grasp the outer gripping sleeve of the needle guard and pull the needle guard off the functional sleeve .

[0078] The fact that the elastic protective element is arranged in the grip sleeve so that it can be carried along means in particular that the elastic protective element is pulled off the injection needle when the outer grip sleeve is pulled off the functional sleeve. In particular, the elastic protective element is carried along with the gripping sleeve.

[0079] According to a further development of the invention, it is provided that the injection loading part has at least one driver which is set up to interact with a driving surface of the rotating disc of the privacy protection locking mechanism in such a way that the rotating disc is rotated from its blocked position into the released position when the injection loading part is in the distal part is introduced. The driver is preferably designed as an axial projection on the injection loading part, in particular on the functional sleeve, which extends in the proximal direction. The injection loading part preferably has two such drivers. These two drivers are preferably formed diametrically opposite one another on the injection loading part.

[0080] According to a development of the invention, it is preferably provided that the needle protection part is locked on the functional sleeve in such a way that the needle protection part can only be separated from the functional sleeve when the injection loading part is arranged in the distal part. Advantageously, the needle protection part cannot then be inadvertently separated from the functional sleeve as long as the injection loading part is arranged outside of the distal part and therefore no injection is intended to be carried out. Puncture injuries to a user can be avoided very efficiently in this way in particular.

[0081] The fact that the needle protection part is locked on the functional sleeve also means that, in a preferred embodiment, the needle protection part is clamped on the functional sleeve. A form fit between the needle guard and the functional sleeve is therefore not absolutely necessary. Nevertheless, such a form fit can be provided.

[0082] The fact that the needle protection part can only be separated from the functional sleeve when the injection loading part is arranged in the distal part means in particular that the needle protection part can only be separated from the functional sleeve non-destructively, in particular without the use of force.

[0083] The functional sleeve preferably has at least one spring arm which is elastically prestressed radially outwards, preferably two spring arms which are elastically prestressed radially outwards, the at least one spring arm holding the needle protection part. The at least one spring arm is urged radially inwards against its pretension and thus releases the needle protection part when the injection loading part is arranged in the distal part. In particular, the spring arm is then urged radially inwards by an inner peripheral surface of the distal part.

[0084] The at least one spring arm is preferably designed as a clamping arm or locking arm.

[0085] At least one actuating lug is preferably arranged on the spring arm. This actuating lug then interacts with the distal part, so that the spring arm is urged radially inwards against the preload when the injection loading part is arranged in the distal part.

[0086] The invention is explained in more detail below with reference to the drawing. show: FIG. 1 shows a first exemplary embodiment of an injection device and a first exemplary embodiment of an injection loading part for the injection device; FIG. 2 shows a detailed longitudinal section of the injection device with the charging part according to FIG figure 1 in a first functional position; Figure 3, the injection device and the loading part according to figure 1 in a second functional position; Figure 4, the injection device and the loading part according to figure 1 in a third functional position; FIG. 5 shows a second exemplary embodiment of an injection device and a second exemplary embodiment of an injection loading part; FIG. 6 shows a detailed longitudinal section view of the injection device with the injection loading part according to FIG figure 5 ; FIG. 7 shows a detailed longitudinal section of the injection device with the injection loading part according to FIG figure 5 in a first functional position; FIG. 8 shows the injection device and the injection loading part figure 5 in a second functional position; FIG. 9 shows a further detailed longitudinal section representation of the injection device and the injection loading part according to FIG figure 5 , and FIG. 10 shows a detailed cross-sectional representation of the injection device and the injection loading part according to FIG figure 5 .

[0087] 1 shows at a) a first exemplary embodiment of an injection device 1 and at b) a first exemplary embodiment of an injection loading part 3 which is set up for use with the injection device 1, in particular for use in the injection device 1.

[0088] The injection device 1 is set up for injecting a pharmaceutical substance and has a proximal part 5, which is also referred to as the back end. The proximal part 5 has, in particular not visible to the observer, a drive 7 which is located on the inside and is only indicated schematically here and which is set up to effect the injection. The drive 7 can have an electric motor, for example, which is connected to an in figure 1 not shown piston rod acts to move them axially. The drive 7 can be supplied with energy from an accumulator or a battery. It is possible for the drive 7 to be operatively connected to the piston rod via a gear.

[0089] The injection device 1 also preferably has a control unit which in figure 1 likewise not shown and is arranged in particular on the inside in the proximal part 5 . The control unit is set up to control the drive 7; in general, it is preferably set up to control the injection device 1 and to carry out an injection. It is possible for the control device to be connected to at least one sensor in order to be able to carry out the injection as a function of at least one parameter detected by the sensor.

[0090] The proximal part 5 has an actuating button 9 which is in particular operatively connected to the control unit and is preferably set up in such a way that the injection can be started and / or ended by actuating the actuating button 9 .

[0091] Furthermore, the proximal part 5 preferably has a display device 11, in particular a display, which is preferably also connected to the control device and set up to display instructions to the user, in particular step-by-step instructions, parameter values ​​and / or the course of the injection .

[0092] It is possible for the proximal part 5 to be designed as a conventional back end of a conventional injection pen.

[0093] The injection device 1 also has a distal part 13, also referred to as a front end, which is designed to receive the injection loading part 3. The distal part 13 is designed in such a way that the injection loading part 3 can be introduced axially into the distal part 13.

[0094] An axial direction here is in particular a direction of the longest extension of the injection device 1 and preferably also of the distal part 13, in particular a direction extending vertically in FIG. A circumferential direction encompasses the axial direction concentrically. A radial direction is perpendicular to the axial direction.

[0095] The injection device 1 also has a privacy screen 15, which is designed and arranged in such a way that an figure 1 not shown injection needle of the injection loading part 3 is hidden during use of the injection device 1 for the user. This makes the injection more comfortable, especially psychologically. At the same time, puncture protection is preferably provided by the visual protection 15, which prevents the user from inadvertently injuring himself on the injection needle.

[0096] The term "distal" here refers to a direction on the injection device 1 intended to face an injection site, in particular on the skin of a patient, i.e. in Figure 1a ) especially on the lower end; the term "proximal", on the other hand, denotes a direction on the injection device 1 which is remote from the injection site, in Figure 1a ) accordingly in particular the upper end of the injection device 1.

[0097] In the first exemplary embodiment, the distal part 13 is detachably connected to the proximal part 5 . For this purpose, a connection mechanism is provided in particular, which can be designed, for example, in the manner of a bayonet catch.

[0098] The injection device 1 preferably has the drive 7 as the only drive. The injection device 1 is preferably set up in such a way that at least one other mechanical function of the injection device is brought about by the displacement of the piston rod, in particular the injection needle puncturing under the sight shield 15 and / or locking and / or unlocking the injection loading part 3 and / or of the privacy screen 15.

[0099] The injection device 1 is preferably designed as a pen or auto-injector.

[0100] The injection loading part 3 has a packaging material receiving part 17 in which an in Figure 1b ) concealed primary packaging is kept. The pharmaceutical substance for injection is arranged in the primary packaging means. The pharmaceutical substance is injectable from the injection loading part 3 when the injection loading part 3 is placed in the distal part 13 .

[0101] The packaging receiving part 17 preferably has a functional sleeve 19 in which the primary packaging is received. In addition, the packaging receiving part 17 has an in figure 1 non-illustrated security part, through which the primary packaging is secured in the functional sleeve 19, in particular fixed.

[0102] The injection loading part 3 has a needle protection part 21 which is detachably connected to the functional sleeve 19 and conceals the injection needle of the primary packaging means when the needle protection part 21 is connected to the functional sleeve 19 .

[0103] 2 shows a detailed longitudinal sectional view of the first embodiment of the injection device 1 with the first embodiment of the injection loading part 3 according to FIG figure 1 , wherein the injection loading part 3 is accommodated in the distal part 13 .

[0104] Elements that are the same and have the same function are denoted by the same reference symbols in all figures, so that reference is made to the previous description in each case.

[0105] In the sectional view of figure 2 a primary packaging means 23 accommodated in the functional sleeve 19 can be seen, which is designed in particular as a syringe or carpule. The primary packaging 23 has an injection needle 25 which is firmly connected here to a packaging body 26 of the primary packaging 23 , in particular glued to a distal end of the packaging body 26 . A pharmaceutical substance (not shown) is arranged in the primary packaging means 23, as well as a stopper or plunger 27 that can be displaced in the axial direction within the primary packaging means 23, by moving which the pharmaceutical substance can be expelled from the primary packaging means 23 in a manner known per se.

[0106] A securing part 29 is connected to the functional sleeve 19 here, by means of which the primary packaging means 23 is held securely and stably in the functional sleeve 19 . The securing part 29 is preferably designed as a clamping ring, as a clip part or as a clip ring.

[0107] The needle guard part 21 has an outer gripping sleeve 31 and an elastic protective element 33, preferably made of pharmaceutical rubber, which is arranged inside the gripping sleeve 31 so that it can be carried along. The injection needle 25 is accommodated in the elastic protection element 33 when the needle protection part 21 is connected to the functional sleeve 19 . The user can grasp the needle guard 21 on the outer gripping sleeve 31 and pull it off the functional sleeve 19 . At the same time, the elastic protective element 33 is taken along and pulled off the injection needle 25 . This will be uncovered so that an injection is possible. The grip sleeve 31 protrudes, in particular in the distal direction, beyond a distal end face 35 of the distal part 13 so that it can be easily gripped and pulled off by the user. Even after the gripping sleeve 31 and the elastic protective element 33 have been pulled off, the injection needle 25 is at least initially still arranged within the sight protection 15 and is therefore hidden from the user both visually and preferably also haptically.

[0108] In the first embodiment, the privacy shield 15 is rigidly provided on the distal part 13 . In particular, the privacy screen 15 is formed by the distal part 13 . The visual protection 15 is here in particular a part of a peripheral wall 61 of the distal part 13.

[0109] A proximal end face 37 of the distal part 13 has a loading opening 39 through which the injection loading part 3 can be introduced into the distal part 13 . For this purpose, the user can first detach the distal part 13 from the proximal part 5 and then insert the injection loading part 3 into the distal part 13 . Thereafter, the distal part 13 can be connected to the proximal part 5 again.

[0110] As in figure 2 As can be seen, when connected to the proximal part 5, a piston rod 41 of the proximal part 5, which can be displaced in the axial direction by the drive 7, also protrudes through the loading opening 39 into the distal part 13.

[0111] A spring device 43 is preferably arranged in the distal part 13 and is designed here as a helical spring. The injection loading part 3 is supported with a flange 44 on a proximal end of the spring device 43 . The spring device 43 in turn is supported with its distal end on a shoulder 45 of the distal part 13 . The injection charger 3 is in figure 2 shown in a protective position. In the protective position, the injection needle 25 is arranged completely within the distal part 13 and thus in particular within the visual protection 15 . The injection loading part 3 can be displaced within the distal part 13 against the spring force of the spring device 43 in the distal direction into an injection position, with the injection needle 25 partially protruding from the distal part 13 in the injection position, in particular protruding beyond the distal end face 35. An injection can be carried out in this injection position. As will be explained below, the displacement of the injection loading part 3 in the distal part 13 is brought about by the piston rod 41 .

[0112] The injection device 1 has a locking part 47 which can be inserted through the loading opening 39 into the distal part 13 . The locking part 47 is designed to rest against a proximal contact surface 49 of the injection loading part 3 . The locking part 47 has a base body 51 and at least one locking element 53 pivotally articulated on the base body 51 , in the exemplary embodiment shown here two diametrically opposite locking elements 53 pivotably articulated on the base body 51 . The functioning of the locking part 47 in connection with the implementation of an injection is described below with reference to FIG Figures 3 and 4 explained in more detail.

[0113] The locking part 47 can be attached to the proximal part 5 so that it can be carried along and at the same time be displaceable relative to the proximal part 5 in such a way that the piston rod 41 can be displaced relative to the locking part 47 at the same time. This configuration has the advantage that the locking part 47 is easy to handle and cannot be lost. Alternatively, however, it is also possible for the locking part 47 to be designed as a separate element, which is inserted through the loading opening 39 in particular after the injection loading part 3 has been introduced into the distal part 13 . It can then be removed again from the distal part 13 via the loading opening 39 in order to remove the injection loading part 3 after the injection has been carried out.

[0114] The locking elements 53 are L-shaped, with an inner leg 55 and an outer leg 57, the locking elements 53 being pivotably articulated on the base body 51 in the area of ​​a connection or an intersection between the inner leg 55 and the outer leg 57. The inner leg 55 and the outer leg 57 are preferably perpendicular to one another.

[0115] The distal part 13 has at least one latch opening 59 , here in particular two latch openings 59 diametrically opposite one another, which are designed in particular as windows in the circumferential wall 61 of the distal part 13 . One of the latch openings 59 is also in Figure 1a ) shown.

[0116] In figure 2 1, the locking part 47 is shown in a first axial position within the distal part 13, which is also referred to as the unlocking position, the locking part 47 being arranged remote from the locking openings 59 in the axial direction. In this first axial position and unlocked position, the locking elements 53 are pivoted into the base body 51 .

[0117] The locking part 47 has an axial passage opening 63 for the piston rod 41 . The passage opening 63 passes through the base body 51 in such a way that the piston rod 41 can reach through the base body 51 through the passage opening 63 at least in a functional position of the locking part 47 .

[0118] In the in the figure 2 In the first axial position shown, ie the unlocking position, the locking elements 53 - here with the inner legs 55 - engage in the access opening 63, so that this is blocked for the piston rod 41.

[0119] The locking part 47 can therefore be displaced—together with the injection loading part 3—by the piston rod 41 and is carried along by it when the piston rod 41 is displaced in the distal direction. At the same time, the primary packaging means 23 with the injection needle 25 is also displaced in the distal direction.

[0120] 3 shows the first exemplary embodiment of the injection device 1 with the injection loading part 3 with the needle protection part 21 removed and in a functional position in which the locking part 47 has been displaced by the piston rod 41 from the first axial position in the direction of a second axial position, this second axial position also being referred to as the locking position becomes. However, is in figure 3 the locking part 47 has not yet arrived in the second axial position. However, it can be seen that the injection needle 25 already projects beyond the privacy shield 15 and in particular the distal end face 35, and that the spring device 43 is compared to figure 2 is compressed. During the axial displacement of the locking part 47, the locking elements 53 reach the area of ​​the locking openings 59. As in FIG figure 3shown, they can swing radially outwards in this area.

[0121] 4 shows the first exemplary embodiment of the injection device 3 with the injection loading part 3 in a further functional position, specifically here in the second axial position of the locking part 47, i.e. in the locking position, with the injection loading part 3 now being arranged in the injection position. In the second axial position of the locking part 47, the locking elements 53 pivot out at the height of the locking openings 59 and reach through - in particular with the outer legs 57 - the locking openings 59. At the same time, the locking elements 53 release the access opening 63 for the piston rod 41, in particular by the inner legs 55 pivot so far out of the reach-through opening 63 that the piston rod 41 can reach through between the inner legs 55 . The piston rod 41 can thus also reach through the reach-through opening 63 and be displaced relative to the locking part 47 . With the axial position of the injection loading part 3 fixed relative to the distal part 13 , the piston rod 41 can now displace the piston 27 in the distal direction within the primary packaging means 23 relative thereto and thus expel the pharmaceutical substance from the primary packaging means 23 . In this way, in the injection position of the injection loading part 3, the injection is carried out.

[0122] An axial displacement of the injection loading part 3 relative to the distal part 13 is meanwhile blocked or at least limited by the locking elements 53 reaching through the locking openings 59, both in the distal direction, provided that a further distal displacement of the injection loading part 3 is not already limited by the spring device 43, which has moved to the block , as well as in the proximal direction, so that when the friction is reduced by the sliding of the plunger 27 in the primary packaging means 23, the injection loading part 3 cannot be retracted within the distal part 13 under the spring force of the spring device 43 and thus possibly extended out of the patient's skin. A precise position of the locking elements 53 within the locking openings 59 - in the axial direction - is set during the injection, in particular depending on the sliding friction of the piston 27 in the primary packaging means 23 on the one hand and the restoring force of the spring device 43 on the other.

[0123] If the plunger rod 41 is pulled back in the proximal direction, particularly after the injection has been completed, and it thereby disengages from the locking elements 53, the injection loading part 3 together with the locking part 47 is pushed in the proximal direction by the force of the spring device 43. The locking elements 53 now pivot back into the base body 51 and the injection loading part 3 is shifted back into its protective position by the spring device 43 .

[0124] figure 5 shows at a) a second embodiment of an injection device 1 and at b) a second embodiment of an injection loading part 3, which is set up to be used with the injection device 1, in particular in the injection device 1 according to the second embodiment.

[0125] In this second exemplary embodiment of the injection device 1, the sight protection 15 is held on the distal part 13 in a displaceable manner, in particular in an axially displaceable manner, in particular between a rest position and an exposure position. The privacy screen is 15 in figure 5 shown in the rest position.

[0126] In this second exemplary embodiment of the injection device 1 , the distal part 13 is preferably non-detachably connected to the proximal part 5 . However, an embodiment is also possible in which the distal part 13 is detachably connected to the proximal part 5, for example for maintenance or repair purposes.

[0127] The injection loading part 3 has - as in the first embodiment - also according to the second embodiment the packaging receiving part 17 with the functional sleeve 19 and the securing part 29, which is designed here as a clip ring and in particular with clip projections in clip recesses 65, of which only one is visible to the viewer here facing and therefore shown, the function sleeve 19 engages. The primary packaging means 23 is arranged in the functional sleeve 19 of the packaging means receiving part 17 and is secured there by the securing part 29 .

[0128] The injection loading part 3 according to the second exemplary embodiment has at least one driver 67, here two diametrically opposite drivers 67, the function of which will be explained below. The catches 67 are designed in particular as proximal projections on the functional sleeve 19 .

[0129] In the second exemplary embodiment, the needle protection part 21 is preferably locked on the functional sleeve 19 in such a way that the needle protection part 21 can only be separated from the functional sleeve 19 without destroying it when the injection loading part 3 is arranged in the distal part 13 . For this purpose, the functional sleeve 19 has here in particular at least one, here two spring arms 69 which are elastically pretensioned radially outwards and which keep the needle protection part 21 locked. An actuating lug 71 is arranged on each of the spring arms 69 . If the injection loading part 3 is introduced into the distal part 13, the actuating lugs 71 are pushed radially inwards by the peripheral wall 61 of the distal part 13, with the spring arms 69 releasing the needle protection part 21 so that it can be pulled off the functional sleeve 19.

[0130] coming back on Figure 5a ) A viewing window 73 is preferably formed in the peripheral wall 61 of the distal part 13, through which the user can observe the progress of the injection and / or a filling level of the primary packaging means 23, in particular while an injection is being carried out.

[0131] 6 shows a detailed longitudinal section of the second exemplary embodiment of the injection device 3 with the injection loading part 3 accommodated in the distal part 13.

[0132] The representation according to figure 6 shows that the privacy screen 15 is biased by a biasing device 75 in the rest position. The prestressing device 75 is arranged in particular within the distal part 13 and is preferably designed as a helical spring. The privacy screen 15 can be displaced axially and in the proximal direction against the prestressing of the prestressing device 75 from the rest position into the exposure position.

[0133] In figure 6 It is also shown that the injection device 1 preferably has an adjustable stop 77 for the movable privacy screen 15. The visual protection 15 preferably strikes the adjustable stop 77 in the exposure position. In particular, the distal part 13 has a stop sleeve 79 on its outer circumference, which has the stop 77 in particular as an inner radial projection, in particular as an inner annular collar 78, or as an outer annular collar or simply as a distal end face 80, with the privacy shield 15 having a radially outer annular collar strikes the stop 77 in the exposure position. The stop 77 does not have to have a flat shape, in particular at least one stop point can also be provided. An axial position of the stop sleeve 79 relative to a sleeve body 81 of the distal part 13 can be changed, the axial position of the stop 77 being changed at the same time. For this purpose, the stop sleeve 79 on the one hand and the sleeve body 81 on the other hand preferably have complementary, meshing threaded parts, in particular the sleeve body 81 has an external thread and the stop sleeve 79 has a corresponding internal thread. The threaded parts preferably form a self-locking thread with one another. Adjusting the stop sleeve 79 changes the position of the privacy shield 15 relative to the distal part 13 in the exposure position during the injection and thus also the depth of penetration of the injection needle 25 into the patient's body.

[0134] In the second exemplary embodiment of the injection device 1 , the distal end face 35 of the distal part 13 has the loading opening 39 through which the injection loading part 3 can be introduced into the distal part 13 . In particular, a distal end surface 83 of the sight shield 15 has a corresponding sight shield loading opening 85 through which the injection loading part 3 can be introduced into the interior of the distal part 13 . The injection loading part 3 is thus introduced into the distal part 13 in particular through the sight protection 15 . In this case, the injection loading part 3 can preferably be screwed into the distal part 13, in particular screwed. For this purpose, the distal part 13 preferably has a screw means, in particular at least one thread 87, in which the injection loading part 3 preferably engages with at least one screw-in projection, preferably with two screw-in projections on both sides, so that the injection loading part 3 can be screwed into the at least one thread 87.

[0135] The injection loading part 3 can preferably be arranged in an axially fixed manner in the distal part 13 . For this purpose, the at least one thread 87 can in particular have a thread run-out.

[0136] The distal part 13 has a view shield locking mechanism 89 which is arranged to lock the view shield 15 in a locking position of the view shield locking mechanism 89 against axial displacement between the rest position and the exposure position, i.e. to lock it, and in a release position this displacement to release. The sight protection locking mechanism 89 is preferably set up to be unlocked when the injection loading part 3 is being introduced, in particular screwed in or screwed in, into the distal part 13, and to be locked by the piston rod 41, in particular during its axial displacement, in particular in the distal direction . For this purpose, the privacy screen displacement mechanism 89 preferably has a rotary disc 91 which rotates about an in figure 6 vertical longitudinal axis of the distal part 13 is rotatably arranged in the distal part 13 between the locking position and the release position. In the release position, a locking projection 93 of the privacy screen 15 can be displaced from the distal side of the turntable 91 to its proximal side, with the locking projection 93 striking the distal side of the turntable 91 in the locked position. A shift of the privacy screen 15 in the exposure position is then blocked.

[0137] 7 shows a further detailed longitudinal section of the second exemplary embodiment of the injection device 1 with the injection loading part 3 in a first functional position, in this case the release position of the locking mechanism 89 for sight protection Release position has been rotated so that the privacy screen 15 is displaced with its locking projection 93 in the proximal direction against the biasing force of the biasing device 75 in the exposure position. Compared to figure 6 the locking projection 93 is now no longer arranged on the distal side of the rotary disc 91, but rather on its proximal side. The injection needle 25 is thus uncovered, so that an injection can be carried out by displacing the piston rod 41 distally. It should be noted that in the second embodiment, the injection loading part 3 is not displaced in the axial direction for the purpose of performing the injection.

[0138] 8 shows one of the representation of figure 7 Corresponding representation of the second exemplary embodiment of the injection device 1 with the injection loading part 3 in a second functional position. It is shown here that displacement of the piston rod 41 in the axial direction for carrying out the injection causes the rotary disc 91 to be rotated into the blocking position by the piston rod 41 . In this respect, the piston rod 41 has an actuation structure 95, here in the form of two actuator pins 97, with the actuation structure 95 rotating the rotating disk 91 in the direction of its locked position when the actuating structure 95 passes the rotating disk coming from the proximal side in the direction of the distal side.

[0139] In contrast, there is no further rotation of the rotary disc 91 when the piston rod 41 and in particular the actuation structure 95 are moved back from the distal side to the proximal side of the rotary disc 91. After the injection has ended, the needle guard 15 can nevertheless be driven out of the exposure position by the biasing force of the biasing device 75 return to its rest position, since the locking projection 93 is arranged on a spring tongue 94 and is ramp-shaped so that it deflects radially outwards when it comes into contact with the rotating disk 91 and can thus pass through the rotating disk 91 coming from the proximal direction to the distal side.

[0140] 9 shows a further detailed representation of the second exemplary embodiment of the injection device 1 with the injection loading part 3. This representation makes it clear that the rotating disk 91 has at least one driving surface 99, preferably two driving surfaces 99 that are in particular diametrically opposite one another, with the driving surface 99 being set up to the driver 67 of the injection loading part 3 to cooperate in such a way that the rotary disc 91 is rotated from the locked position to the unlocking position when the injection loading part 3 is screwed into the distal part 13 . The driving surface 99 is arranged in particular on a driving projection which extends in the distal direction on the rotary disc 91 . In particular, the driver 67 and the driving surface 99 preferably interact in the manner of a claw coupling.

[0141] 10 shows a detailed cross-sectional representation of the second exemplary embodiment of the injection device 1 with the injection loading part 3, the cross-sectional plane here being arranged just above, ie proximally, the rotating disk 91.

[0142] In this representation, it is clear on the one hand that the turntable 91 has at least one through-hole 101, here in particular two diametrically opposite through-holes 101, through which, in the release position, the figure 10 is shown, the locking projection 93 of the privacy screen 15 - here two diametrically opposite locking projections 93 - can be displaced through. The through-cutouts 101 are designed in particular as radial, open-edged cutouts.

[0143] In addition, based on the representation of figure 10 clear that rotary disk 91 preferably has at least one run-off surface 103, here in particular two run-off surfaces 103, preferably diametrically opposite one another, wherein actuation structure 95, in particular actuator pins 97, of piston rod 41 can run off on run-off surfaces 103 when piston rod 41 is in the distal direction is shifted. The rotary disk 91 is rotated from the release position to the locked position when the piston rod 41 is displaced axially in the distal direction relative to the rotary disk 91, in particular when the actuating structure 95, in particular the actuator pins 97, the rotary disk coming from the proximal side in the direction pass the distal side.

[0144] In this case, the injection loading part 3 is preferably also turned back by the corresponding angle in the thread outlet, but due to the design of the thread outlet of the at least one thread turn 87, preferably no or at most a slight axial displacement of the injection loading part 3 relative to the distal part 13 is effected. A rotation of the injection needle 25 in the patient's body is preferably at least largely avoided in that the primary packaging means 23 is preferably accommodated in the functional sleeve 19 in a freely rotatable manner.

[0145] In the circumferential direction next to the run-off surfaces 103, through-windows 105 are formed, through which the actuation structure 95 can be displaced from the distal side back to the proximal side, preferably without touching the rotary disc 91, when the piston rod 41 is retracted. Thus, the rotary disk 91 does not rotate when the piston rod 41 is retracted in the proximal direction after the injection has been performed.

[0146] In figure 10also shows that the turntable 91 preferably has a locking lug 107 with which it can engage in corresponding locking recesses 109, 111 in the peripheral wall 61 of the distal part 13 on the one hand in the release position and on the other hand in the locked position. A first latching recess 109 is in figure 10 assigned released position shown. A second locking recess 111 is associated with the locked position. In particular, the latching recess 109 and the latching of the latching lug 107 therein also serve in particular to provide mechanical-haptic—possibly also acoustic—feedback to the user that the injection loading part 3 is completely, ie ready for injection, arranged in the distal part 13 .

[0147] Thus, it is also clear that in the viewer's line of sight figure 10 seen the turntable 13 is rotated counterclockwise from the locked position to the release position when the injection loading part 3 is screwed in, while when the actuating structure 95 runs on the run-off surfaces 103, it is rotated clockwise from the released position back to the locked position.

[0148] The invention relates in particular to the following numbered points: 1. An injection device (1) for injecting a pharmaceutical substance, with a proximal part (5) which has a drive (7) for effecting an injection, and with a distal part (13) which is set up to receive an injection loading part (3) , which has a packaging means receiving part (17) and a primary packaging means (23) held in the packaging means receiving part (17) and in which a pharmaceutical substance is received, the pharmaceutical substance being injectable from the injection loading part (3) when the injection loading part (3) is in the distal part (13), the distal part (13) being designed in such a way that the injection loading part (3) can be introduced axially into the distal part (13), and the injection device (1) having a sight protection (15) which is designed and arranged in such a way that an injection needle (25) of the injection loading part (3) is hidden from a user during use of the injection device (1). 2. Injection device (1) according to point 1, characterized, that the injection device (1) has the drive (7) of the proximal part (5) as the only drive (7), the drive (7) acting in particular on a piston rod (41) in order to displace the piston rod (41) axially, wherein the injection device (1) is preferably set up in such a way that at least one other mechanical function of the injection device (1) is additionally brought about by the displacement of the piston rod (41). 3. Injection device (1) according to one of the preceding points, characterized, that the injection device (1) is designed as a pen or as an auto-injector. 4. Injection device (1) according to one of the preceding points, characterized, that the distal part (13) is detachably connected to the proximal part (5). 5. Injection device (1) according to one of the preceding points, characterized, that the privacy screen (15) is rigidly provided on the distal part (13), preferably formed by the distal part (13). 6. Injection device (1) according to one of the preceding points, characterized, that a proximal end face (37) of the distal part (13) has a loading opening (39) through which the injection loading part (3) can be introduced into the distal part (13). 7. Injection device (1) according to one of the preceding points, characterized, in that a spring device (43) is arranged in the distal part (13), against which the injection loading part (3) rests, and against the spring force of which the injection loading part (3) can be displaced in the distal part (13) in the distal direction in order to carry out an injection, when the injection loading part (3) is placed in the distal part (13). 8. Injection device (1) according to one of the preceding points, characterized,that the injection device has a locking part (47) which can be inserted through the loading opening (39) into the distal part (13) and is set up to rest against a proximal contact surface (49) of the injection loading part (3), the locking part (47) having a Base body (51) and at least one on the base body (51) pivotally articulated locking element (53) which in a first axial position within the distal part (13) remote from a locking opening (59) in a peripheral wall (61) of the distal part ( 13) is pivoted into the base body (51), the locking element (53) being set up to pivot out in a second axial position within the distal part (13) at the level of the locking opening (59) and to reach through the locking opening (59). , to block an axial displacement of the injection loading part (3). 9. Injection device (1) according to one of the preceding points, characterized, that the locking part (47) has an axial passage opening (63) for a piston rod (41) assigned to the drive (7), the at least one locking element (53) engaging in the passage opening (63) in the first axial position, so that the passage opening ( 63) is blocked for the piston rod (41) and the locking part (47) can be displaced by the piston rod (41), the locking element (53) releasing the access opening (63) in the second axial position, so that the piston rod (41) can pass through the access opening (63) can reach through and be displaced relative to the locking part (47). 10. Injection device (1) according to one of the preceding points, characterized, that the privacy screen (15) is held displaceably on the distal part (13). 11. Injection device (1) according to one of the preceding points, characterized, that a distal end face (35) of the distal part (13) has a loading opening (39) through which the injection loading part (3) can be introduced into the distal part (13), the injection loading part (3) preferably being screwable into the distal part (13). , in particular can be screwed in, and / or wherein the injection loading part (3) can be arranged in an axially fixed manner in the distal part (13). 12. Injection device (1) according to one of the preceding points, characterized, that the distal part (13) has a sight shield locking mechanism (89) which is set up to lock the sight shield (15) in a locking position and to release it in a release position, the sight shield locking mechanism (89) preferably being set up to Insertion of the injection loading part (3) into the distal part (13) and being unlocked by a piston rod (41) assigned to the drive (7). 13. Injection device (1) according to one of the preceding points, characterized, that the sight protection locking mechanism (89) has a rotary disc (91) which is arranged in the distal part (13) so that it can rotate about a longitudinal axis of the distal part (13) between the locking position and the release position, the rotary disc (91) having at least one through-recess ( 101) through which a blocking projection (93) of the privacy screen (15) can be displaced in the release position, the blocking projection (93) striking the rotary disc (91) in the blocking position. 14. Injection device (1) according to one of the preceding points, characterized, that the turntable (91) a) has at least one driving surface (99) which is set up to interact with a driver (67) of the injection loading part (3), so that the turntable (91) is rotated from the blocked position into the released position, when the injection loading part (3) is screwed into the distal part (13); and / or b) has at least one run-off surface (103) on which an actuating structure (95) of the piston rod (41) can run, in such a way that the rotary disc (91) is rotated from the release position into the blocked position when the piston rod (41 ) is axially displaced in a certain direction. 15. Injection device (1) according to one of the preceding points, characterized,that the injection device (1) has an adjustable stop (77) for the displaceable sight protection (15), the sight protection (15) preferably striking the adjustable stop (77) in an exposure position in which an injection can be carried out. 16. An injection loading part (3) for use in an injection device (1) according to one of points 1 to 15, with a packaging means receiving part (17) in which a primary packaging means (23) is held, wherein a pharmaceutical substance is contained in the primary packaging means (23). is arranged. 17. Injection loading part (3) according to point 16, characterized, that the packaging receiving part (17) has a functional sleeve (19) and a securing part (29), the primary packaging means (23) being accommodated in the functional sleeve (19), and the primary packaging means (23) being held in the functional sleeve by the securing part (29). (19) is secured. 18. Injection loading part (3) according to one of points 16 or 17, characterized, that the injection loading part (3) has a needle protection part (21) which is detachably connected to the functional sleeve (19) and conceals an injection needle (25) of the primary packaging means (23) when the needle protection part (21) is connected to the functional sleeve (19). . 19. Injection loading part (3) according to one of points 16 to 18, characterized, that the needle protection part (21) has an outer grip sleeve (31) and an elastic protection element (33) which can be carried along inside the grip sleeve (31) and in which the injection needle (25) is accommodated when the needle protection part (21) with the functional sleeve ( 19) is connected. 20. Injection loading part (3) according to one of points 16 to 19, characterized, that the injection loading part (3) has at least one driver (67) which is set up to interact with the at least one driving surface (99) of the rotary disc (91) of the distal part (13) in such a way that the rotary disc (91) moves from the locked position rotated to the release position when the injection loading part (3) is screwed into the distal part (13). 21. Injection loading part (3) according to one of points 16 to 20, characterized, that the needle protection part (21) is locked on the functional sleeve (19) in such a way that the needle protection part (21) can be separated from the functional sleeve (19) when the injection loading part (3) is arranged in the distal part (13).

Claims

1. Injection device (1) for injecting a pharmaceutical substance, comprising: - a proximal part (5) having a drive (7) for effecting an injection, and - a distal part (13) configured to receive an injection load part (3) having a packaging receiving part (17) and a primary packaging (23) held in the packaging receiving part (17) in which a pharmaceutical substance is contained, wherein the pharmaceutical substance is injectable from the injection load part (3) when the injection load part (3) is arranged in the distal part (13), wherein - the distal part (13) is configured such that the injection load part (3) can be inserted axially into the distal part (13), and wherein - the injection device (1) has a sight shield (15) configured and arranged such that an injection needle (25) of the injection load part (3) is visible during application of the The injection device (1) is hidden from the user.

2. Injection device (1) according to claim 1, characterized by the fact that the injection device (1) has the drive (7) of the proximal part (5) as the only drive (7), wherein the drive (7) acts in particular on a piston rod (41) to axially displace the piston rod (41), wherein the injection device (1) is preferably arranged such that at least one additional mechanical function of the injection device (1) is effected by the displacement of the piston rod (41).

3. Injection device (1) according to any one of the preceding claims, characterized by the fact that the injection device (1) is designed as a pen or as an autoinjector.

4. Injection device (1) according to any one of the preceding claims, characterized by the fact that the distal part (13) is detachably connected to the proximal part (5).

5. Injection device (1) according to any one of the preceding claims, characterized by the fact thatThe privacy screen (15) is movable and held on the distal part (13).

6. Injection device (1) according to any one of the preceding claims, characterized by the fact that a distal end face (35) of the distal part (13) has a loading opening (39) through which the injection loading part (3) can be inserted into the distal part (13), wherein the injection loading part (3) is preferably rotatable, in particular screwable, into the distal part (13), and / or wherein the injection loading part (3) can be arranged axially fixed in the distal part (13).

7. Injection device (1) according to any one of the preceding claims, characterized by the fact thatthe distal part (13) has a privacy screen locking mechanism (89) which is configured to lock the privacy screen (15) in a locking position and to release it in a release position, wherein the privacy screen locking mechanism (89) is preferably configured to be unlocked when the injection loading part (3) is inserted into the distal part (13) and to be locked by a piston rod (41) associated with the drive (7).

8. Injection device (1) according to any one of the preceding claims, characterized by the fact thatthe privacy screen locking mechanism (89) has a rotary disk (91) which is rotatably arranged in the distal part (13) about a longitudinal axis of the distal part (13) between the locking position and the release position, wherein the rotary disk (91) has at least one through-hole (101) through which a locking projection (93) of the privacy screen (15) can be displaced in the release position, wherein the locking projection (93) abuts the rotary disk (91) in the locking position.

9. Injection device (1) according to any one of the preceding claims, characterized by the fact thatthe rotary disk (91) a) has at least one drive surface (99) which is configured to interact with a driver (67) of the injection loading part (3) so that the rotary disk (91) is rotated from the locking position to the release position when the injection loading part (3) is screwed into the distal part (13); and / or b) has at least one run-off surface (103) on which an actuating structure (95) of the piston rod (41) can run, such that the rotary disk (91) is rotated from the release position to the locking position when the piston rod (41) is axially displaced in a certain direction.

10. Injection device (1) according to any one of the preceding claims, characterized by the fact that the injection device (1) has an adjustable stop (77) for the movable screen (15), wherein the screen (15) preferably abuts the adjustable stop (77) in an exposure position in which an injection can be carried out.

11. Injection loading part (3) for use in an injection device (1) according to one of claims 1 to 10, comprising a packaging receiving part (17) in which a primary packaging (23) is held, wherein a pharmaceutical substance is arranged in the primary packaging (23).

12. Injection loading part (3) according to claim 11, characterized by the fact that the packaging receiving part (17) has a functional sleeve (19) and a securing part (29), wherein the primary packaging (23) is received in the functional sleeve (19), and wherein the primary packaging (23) is secured in the functional sleeve (19) by the securing part (29).

13. Injection loading part (3) according to one of claims 11 or 12, characterized by the fact that the injection loading part (3) has a needle guard part (21) which is detachably connected to the functional sleeve (19) and conceals an injection needle (25) of the primary packaging (23) when the needle guard part (21) is connected to the functional sleeve (19).

14. Injection loading part (3) according to one of claims 11 to 13, characterized by the fact that the needle guard part (21) has an outer handle sleeve (31) and an elastic protective element (33) which is removably arranged inside the handle sleeve (31) and in which the injection needle (25) is received when the needle guard part (21) is connected to the functional sleeve (19).

15. Injection loading part (3) according to one of claims 11 to 14, characterized by the fact that the injection loading part (3) has at least one driver (67) which is arranged to interact with the at least one drive surface (99) of the rotary disk (91) of the distal part (13) such that the rotary disk (91) is rotated from the locking position to the release position when the injection loading part (3) is screwed into the distal part (13).

16. Injection loading part (3) according to one of claims 11 to 15, characterized by the fact thatthe needle guard part (21) is locked to the functional sleeve (19) in such a way that the needle guard part (21) can be separated from the functional sleeve (19) when the injection loading part (3) is arranged in the distal part (13).