Drug delivery device attached to the outside of the body

Abstract

An externally attached drug delivery device is disclosed. An externally attached drug delivery device according to one aspect of the present invention may include: a first body providing a first space for receiving a therapeutic drug; a second body providing a second space for receiving a mixing liquid and positioned in front of the first space, and coupled to the front side of the first body; a barrier interposed between the first space and the second space to separate the first space and the second space; a needle supported by the first body, having one end connected to the first space and the other end exposed to the outside of the first body so as to be inserted into the skin of a user; and an operating member having its front end initially positioned behind the barrier and performing two forward movements, wherein during the first forward movement, the internal pressure of the first space is increased to discharge the therapeutic drug received in the first space through the needle, and during the second forward movement, the barrier is damaged to mix the mixing liquid with the therapeutic drug remaining in the first space.

Description

Technology Field

[0001] The present invention relates to an externally attached drug delivery device. Background Technology

[0002] Drug therapy is a method used to treat various diseases. Typically, drugs are administered via injection. However, while injectable administration has the advantage of excellent drug delivery, it has the disadvantage that frequent injections increase patient discomfort and require the assistance of a skilled medical professional because proficiency is required to administer the drugs.

[0003] Therefore, external drug delivery devices have been developed as a means to reduce the number of hospital visits for drug treatment and improve patient convenience and medication adherence.

[0004] Meanwhile, some drugs, including narcotic analgesics, have been misused and abused outside of their intended therapeutic purposes, emerging as a serious social problem. In the absence of separate safety devices, if these drugs are prescribed via external drug delivery devices, there is a risk that the problem of drug misuse and abuse will be exacerbated, such as by arbitrarily taking the drugs stored inside the external drug delivery device and overdosing.

[0005] To address these issues, technology development is required to resolve the problem of drug misuse by blocking users of externally attached drug delivery devices from accessing inappropriate drugs. The problem to be solved

[0006] The present invention aims to solve the aforementioned problems, and the objective of the present invention is to provide an externally attached drug delivery device configured to prevent the reuse of therapeutic drugs remaining in the device.

[0007] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art to which the present invention pertains from the description below. means of solving the problem

[0008] According to one aspect of the present invention, an externally attached drug delivery device is provided, comprising: a first body providing a first space for receiving a therapeutic drug; a second body providing a second space for receiving a mixing liquid and positioned in front of the first space and coupled to the front side of the first body; a barrier interposed between the first space and the second space to separate the first space and the second space; a needle supported by the first body, having one end connected to the first space and the other end exposed to the outside of the first body so as to be inserted into the skin of a user; and an operating member having its front end initially positioned behind the barrier and performing two forward movements, wherein during the first forward movement, the internal pressure of the first space is increased to discharge the therapeutic drug received in the first space through the needle, and during the second forward movement, the barrier is damaged to mix the mixing liquid with the therapeutic drug remaining in the first space.

[0009] At this time, the first forward movement of the operating member is performed after the needle is inserted into the user's skin, and the second forward movement of the operating member is performed after the needle is separated from the user's skin.

[0010] Meanwhile, the first body may include a body portion having an internal space formed therein that is used as the first space; and a cylinder portion formed integrally with the body portion, having a tube shape extending in the front-rear direction, and connected to the internal space of the body portion.

[0011] At this time, the body portion and the cylinder portion share a portion of the side facing the user's skin, and in the shared portion shared by the body portion and the cylinder portion, a needle penetration hole is formed through which the needle penetrates so that one end of the needle is positioned in the hollow of the cylinder portion, and the needle penetration hole is closed by an auxiliary barrier, and the auxiliary barrier may be formed to be partially perforated by the needle.

[0012] At this time, a deformation portion whose size varies according to the pressure change of the first space may be formed on one side wall of the body portion.

[0013] The first body may further include a cartridge mounting portion integrally formed on the outer side of the side facing the user's skin of the body portion, and on which a needle cartridge supporting the needle is mounted.

[0014] At this time, the needle is formed integrally with a plate-shaped support, and the support can be mounted on the cartridge.

[0015] Meanwhile, the above operating member may include: a pressurizing member that is initially positioned inside the cylinder part and advances along the cylinder part during the first advance movement to increase the pressure in the first space; and a damage-inducing member that is positioned in front of the pressurizing member and damages the barrier during the second advance movement.

[0016] Meanwhile, the above-described externally attached drug delivery device may further include: a first elastic member providing elastic force to advance the operating member; and a third body coupled to the rear side of the first body and supporting the first elastic member.

[0017] At this time, the externally attached drug delivery device may further include a first trigger that induces the first forward movement of the operating member; and a second trigger that induces the second forward movement of the operating member.

[0018] At this time, the operating member may further include a trigger part disposed inside the third body and linked with the first trigger and the second trigger.

[0019] At this time, the first trigger includes a first locking part that enters and exits a first locking hole formed in the trigger part; and a first trigger body part formed integrally with the first locking part and operably supported on the third body to perform a first insertion operation in which the first locking part is inserted into the first locking hole and a first discharge operation in which the first locking part is discharged from the first locking hole, and initially the first trigger performs the first insertion operation and the first locking part contacts the inner rear part of the first locking hole, and when the first trigger performs the first discharge operation by a first external force, the operating member can perform the first forward operation by the first elastic member.

[0020] At this time, the third body may include: a base body portion having a side wall formed such that the trigger portion is disposed therein and a first locking portion through hole through which the first locking portion inserted into the first locking hole passes; and a guide body portion coupled to the outside of the side wall of the base body portion and operably supporting the first trigger body portion.

[0021] At this time, a first magnet is fixedly installed in the first trigger body part, and a second magnet corresponding to the first magnet may be fixedly installed in the outer part of the base body part facing the first trigger body part.

[0022] Meanwhile, a first magnet is fixedly installed in the first trigger body portion, and the first external force may be a magnetic force generated between the first magnet and an external magnet adjacent to the guide body portion.

[0023] Meanwhile, the first trigger comprises: a first locking part that enters and exits a first locking hole formed on one side wall of the third body; and a first trigger body part formed integrally with the first locking part and operably supported by the trigger part to perform a first insertion operation in which the first locking part is inserted into the first locking hole and a first discharge operation in which the first locking part is discharged from the first locking hole, wherein initially the first trigger performs the first insertion operation and the first locking part contacts the inner rear portion of the first locking hole, and when the first trigger performs the first discharge operation by a first external force, the operating member can perform the first forward operation by the first elastic member.

[0024] At this time, the first external force may be a force that presses the first locking part, which is exposed to the outside through the first locking hole, into the interior of the third body.

[0025] Meanwhile, the second trigger comprises a second locking part that can be inserted into a second locking hole formed in the trigger part; The device includes a second trigger body portion formed on one side of the second locking portion and operably supported on the third body to perform a second insertion operation in which the second locking portion is inserted into the second locking hole and a second discharge operation in which the second locking portion is discharged from the second locking hole, wherein initially the second trigger performs the second discharge operation, and when the needle is inserted into the user's skin, the second trigger performs the second insertion operation by a force pressing against the user's skin, and the second locking portion is spaced apart from the inner rear portion of the second locking hole by a predetermined distance, and when the operating member performs the first forward movement, the second locking portion contacts the inner rear portion of the second locking hole, and when the needle is separated from the user's skin, the second trigger performs the second discharge operation by a second external force, and the operating member can perform the second forward movement.

[0026] At this time, the third body may have a side wall formed with a second locking part through hole through which the second locking part inserted into the second locking hole passes.

[0027] Meanwhile, the second trigger is supported by the third body by a second elastic member, and the second elastic member is compressed when the second insertion operation is performed by the force of the second trigger being pressed against the user's skin, and the second external force may be an elastic force due to the compression of the second elastic member.

[0028] Meanwhile, on the side opposite to the side facing the user's skin of the trigger portion, a first locking hole is formed through which the first locking part of the first trigger enters and exits, and on the side of the trigger portion facing the user's skin, a second locking hole is formed through which the second locking part of the second trigger enters and exits, and the first locking hole and the second locking hole can be connected to each other to form a single common hole. Effects of the invention

[0029] According to the above configuration, an externally attached drug delivery device according to one aspect of the present invention operates such that when a user attaches the device to the skin and injects a therapeutic drug under the skin, and then separates it from the skin, the therapeutic drug remaining in the device is mixed with a mixing liquid, making reuse impossible. Using such an externally attached drug delivery device can effectively prevent misuse caused by the reuse of the therapeutic drug remaining in the device.

[0030] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention. Brief explanation of the drawing

[0031] FIG. 1 is a perspective view of an externally attached drug delivery device according to one embodiment of the present invention, viewed from one direction. FIG. 2 is a drawing of an externally attached drug delivery device according to one embodiment of the present invention, viewed from a different direction. FIG. 3 is an exploded perspective view of an externally attached drug delivery device according to one embodiment of the present invention, viewed from one direction. FIG. 4 is an exploded perspective view of an externally attached drug delivery device according to one embodiment of the present invention, viewed from a different direction. FIG. 5 is a cross-sectional view of an externally attached drug delivery device according to one embodiment of the present invention. FIG. 6 is a longitudinal cross-sectional perspective view of a combination of a first body and a second body, which is a part of an external attachment type drug delivery device according to one embodiment of the present invention. FIG. 7 is a drawing showing a cross-section of a first body, which is a part of a component of an external attachment type drug delivery device according to one embodiment of the present invention. FIGS. 8 to 11 are drawings for explaining the operation of an externally attached drug delivery device according to one embodiment of the present invention. FIG. 12 is a drawing showing a first trigger according to another embodiment of the present invention. Specific details for implementing the invention

[0032] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components.

[0033] The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention.

[0034] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention.

[0035] In this specification, terms such as “comprising” or “having” are intended to describe the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0036] The statement that a component is "in front," "rear," "upper," or "lower" of another component includes, unless there are special circumstances, not only being positioned "in front," "rear," "upper," or "lower" in direct contact with the other component, but also cases where another component is positioned in between. Furthermore, the statement that a component is "connected" to another component includes, unless there are special circumstances, not only being directly connected to each other, but also being indirectly connected to each other.

[0037] FIG. 1 is a perspective view of an external attachment type drug delivery device according to one embodiment of the present invention viewed from one direction, FIG. 2 is a view of an external attachment type drug delivery device according to one embodiment of the present invention viewed from another direction, FIG. 3 is an exploded perspective view of an external attachment type drug delivery device according to one embodiment of the present invention viewed from one direction, FIG. 4 is an exploded perspective view of an external attachment type drug delivery device according to one embodiment of the present invention viewed from another direction, FIG. 5 is a longitudinal cross-sectional view of an external attachment type drug delivery device according to one embodiment of the present invention, FIG. 6 is a longitudinal cross-sectional perspective view of a combination of a first body and a second body, which is a part of the external attachment type drug delivery device according to one embodiment of the present invention, FIG. 7 is a drawing showing a cross-sectional view of a first body, which is a part of the external attachment type drug delivery device according to one embodiment of the present invention.

[0038] Hereinafter, in describing the externally attached drug delivery device, it is assumed that the forward direction refers to the direction in which the operating member (400) advances, the downward direction refers to the direction closer to the user's skin, and the upward direction refers to the direction farther from the user's skin. Accordingly, in FIGS. 1 to 7, +X refers to the forward direction of the device (10), and -Z refers to the downward direction of the device ().

[0039] Also, in Figures 1 to 7, the therapeutic drug and the liquid for mixing are not separately illustrated.

[0040] Referring to FIGS. 1 to 7, an externally attached drug delivery device (10) according to one embodiment of the present invention is a device that is attached to the outside of a user's body, i.e., the skin, to deliver a therapeutic drug, and operates such that when the device is separated from the skin after the therapeutic drug has been injected into the body, the therapeutic drug remaining in the device (10) is mixed with a mixing liquid and cannot be reused.

[0041] Specifically, the externally attached drug delivery device (10) includes a first body (100), a second body (200), a barrier (310), a needle (330), an operating member (400), a first elastic member (510), a third body (600), a first trigger (700), a second trigger (800), a second elastic member (530), and a housing (900).

[0042] The first body (100) provides a first space (100a) for accommodating a therapeutic drug. The therapeutic drug accommodated in the first space (100a) is a drug with a problem of misuse and abuse, and may include, for example, a narcotic analgesic.

[0043] The first body (100) includes a body part (110) and a cylinder part (130).

[0044] An internal space (110a) used as a first space (100a) is formed in the body portion (110). An injection port for injecting a therapeutic drug into the internal space (110a) is formed on one side of the body portion (110), and the injection port can be closed by a stopper (111).

[0045] When a therapeutic drug is injected into the internal space (110a) of the body part (110), it is permanently or semi-permanently closed by a stopper (111) so that it does not open again. Depending on the material of the body part (110) and the stopper (111), the stopper (111) can be permanently or semi-permanently attached to the injection port by an adhesive method or a welding method.

[0046] The body part (110) may have a partially open box shape.

[0047] For example, the front side of the body portion (110) may be open. The open front side of the body portion (110) may be closed by a barrier (310) described later.

[0048] The cylinder portion (130) is formed integrally with the body portion (110). The cylinder portion (130) has a tube shape extending in the front-rear direction and is connected to the internal space (130a) of the body portion (110). At this time, the internal space (130a) of the cylinder portion (130) can be used as a first space (100a) for accommodating therapeutic drugs together with the internal space (110a) of the body portion (110). For reference, the internal space (130a) of the cylinder portion (130) serves as a passage through which the pressurizing portion (430) of the operating member (400), which will be described later, advances. This will be described later.

[0049] The cylinder portion (130) can be positioned to be in contact with the bottom portion of the internal space (110a) of the body portion (110) as shown in FIG. 7. At this time, the body portion (110) and the cylinder portion (130) may share a portion of the side portion, i.e., the lower portion, that is close to the user's skin. At this time, a needle penetration hole (110d) through which a needle (330), described later, passes is formed in the shared portion between the body portion (110) and the cylinder portion (130). The needle penetration hole (110d) is closed by an auxiliary barrier (120).

[0050] The auxiliary barrier (120) is formed to be partially perforated by the needle (330). For example, the auxiliary barrier (120) may be a thin film formed of an elastic material such as silicone or rubber. During the process of installing the needle (330) on the first body (100) or the body part (110), one end of the needle (330) may partially perforate the auxiliary barrier (120) and pass through the needle penetration hole (110d) to be located inside the cylinder part (130). In this case, the therapeutic drug contained in the first space (100a) may be discharged to the outside through one end of the needle (330).

[0051] One side wall (112) of the body part (110) may have a deformable part (113) formed therein, the size of which varies due to pressure changes in the first space (100a). The one side wall (112) of the body part (110) having the deformable part (113) formed therein may be manufactured separately from the rest of the body part (110) and joined together.

[0052] The deformation portion (113) is formed convexly on the inner surface of one side wall (112) of the body portion (110). The deformation portion (113) has a structure in which its size decreases as the pressure in the first space (100a) increases. For example, the deformation portion (113) may have a structure similar to a balloon. Also, the deformation portion (113) may be made of an elastic material such as rubber.

[0053] When the pressure in the first space (100a) increases, the deformation part (113) decreases in size and increases the size of the first space (100a). If the pressure in the first space (100a) increases without the deformation part (113), the barrier (310) described later swells forward and deforms, making it difficult for the operating member (400) described later to damage the barrier (310).

[0054] Therefore, the deformation part (113) deforms itself when the pressure in the first space (100a) increases, thereby increasing the size of the first space (100a), which minimizes the deformation of the barrier (310) and allows the operating member (400) to easily damage the barrier (310).

[0055] The first body (100) may further include a cartridge mounting portion (150) in which a cartridge (340) supporting a needle (330) is mounted.

[0056] The cartridge mounting portion (150) forms a groove into which the cartridge (340) is received. The cartridge mounting portion (150) is formed integrally with the body portion (110) on the outer side of the lower portion, which is the side of the body portion (110) that is close to the user's skin.

[0057] When the cartridge (340) is mounted in the cartridge mounting portion (150) while the needle (330) is supported by the cartridge (340), one end of the needle (330) can partially pierce the auxiliary barrier (120) and pass through the needle penetration hole (110d) to be positioned in the internal space (130a) of the cylinder portion (130).

[0058] The second body (200) provides a second space (200a) for receiving a mixing liquid. The mixing liquid is a liquid that is mixed with the therapeutic drug remaining in the first space (100a). The therapeutic drug mixed with the mixing liquid cannot be reused.

[0059] The second space (200a) is positioned in front of the first space (100a).

[0060] The second body (200) may have a partially open box shape. For example, the rear side of the second body (200) may be open. The open rear side of the second body (200) may be closed by a barrier (310).

[0061] A barrier (310) is interposed between the first space (100a) and the second space (200a). Before the first body (100) and the second body (200) are joined together, the barrier (310) is attached to the front end of the first body (100) or to the rear end of the second body (200).

[0062] The barrier (310) can be formed of an elastic material such as silicone or rubber.

[0063] A second body (200) is positioned in front of the first body (100). The first body (100) and the second body (200) can be joined together by known fastening methods, such as adhesive bonding or welding, depending on the material. In the case of adhesive bonding or welding, the first body (100) and the second body (200) are not easily separated.

[0064] The needle (330) is supported on the first body (100). One end of the needle (330) is located in the first space (100a), and the other end is exposed to the outside of the first body (100) and inserted into the user's skin. The other end of the needle (330) exposed to the outside of the first body (100) can be inserted into the user's skin.

[0065] For example, the needle (330) is formed integrally with a plate-shaped support (331). At this time, the needle (330) and the support (331) can be formed integrally by injection molding the support (331) around the needle (330).

[0066] The support body (331) is coupled with the cartridge (340), and the cartridge (340) can be coupled to the cartridge mounting portion (150) of the first body (100).

[0067] The operating member (400) is initially positioned at the rear of the barrier (310). Here, "initially" means immediately after the externally attached drug delivery device (10) is assembled or before it is used. For reference, FIGS. 1 and FIGS. 5 show the externally attached drug delivery device (10) in its initial state.

[0068] The operating member (400) moves forward twice.

[0069] The operating member (400) increases the internal pressure of the first space (100a) during the first forward movement, thereby discharging the therapeutic drug contained in the first space (100a) to the outside through the needle (330). In this embodiment, the first forward movement of the operating member (400) is performed after the needle (330) is inserted into the user's skin. At this time, the therapeutic drug in the first space (100a) is injected under the user's skin through the needle (330) by the first forward movement of the operating member (400).

[0070] The operating member (400) mixes the liquid for mixing contained in the second space (200a) with the therapeutic drug remaining in the first space (100a) by damaging the barrier (310) when performing a second forward movement.

[0071] In one embodiment of the present invention, the operating member (400) includes a damage-inducing part (410) and a pressurizing part (430). The damage-inducing part (410) and the pressurizing part (430) constitute a front area of ​​the operating member (400).

[0072] The damage-inducing part (410) damages the barrier (310) during the second forward movement of the operating member (400). The damage-inducing part may have a pointed horn shape facing forward.

[0073] The pressurizing part (430) is positioned behind the damage induction part (410). Initially, the pressurizing part (430) is positioned inside the cylinder part (130). The outer surface of the pressurizing part (430) is in close contact with the inner surface of the cylinder part (130). Initially, the pressurizing part (430) is positioned behind the needle penetration hole (110d).

[0074] When the operating member (400) performs a first forward movement, the pressurizing member (430) advances along the cylinder member (130) while in close contact with the inner surface of the cylinder member (130), and accordingly, the internal pressure of the first space (100a) increases. When the internal pressure of the first space (100a) increases, the drug contained in the first space (100a) is discharged to the outside through the needle (330).

[0075] In the first space (100a)

[0076] The damage-inducing part (410) and the pressurizing part (430) are arranged adjacent to each other in the front and back directions.

[0077] Initially, the damage-inducing part (410) may be located inside the cylinder part (130). However, considering the length of the cylinder part (130), the size of the first space (100a), the position of the barrier (310), etc., the damage-inducing part (410) may be located outside the cylinder part (130).

[0078] The pressure member (430) may include an inner portion (431) that serves as a core and an outer portion (433) that surrounds the inner portion (431). At this time, the inner portion of the pressure member (430) is directly connected to a damage-inducing portion (410) located at the front. The outer portion (433) of the pressure member (430) is formed of an elastic material such as rubber.

[0079] Alternatively, although the pressurized part is not illustrated, it may be formed entirely of an elastic material such as rubber without distinction between the inner and outer parts.

[0080] In one embodiment of the present invention, the first forward movement of the operating member (400) is performed by the first trigger (700) after the needle (330) is inserted into the user's skin, and the second forward movement of the operating member (400) is performed by the second trigger (800) after the needle (330) is separated from the user's skin. This will be described later.

[0081] The operating member (400) may further include a trigger part (450) described later. The trigger part (450) constitutes a rear region of the operating member (400). The trigger part (450) is located at the rear of the pressurizing part (430). The trigger part (450) is positioned inside the third body (600) described later and interacts with the first trigger (700) and the second trigger (800). This will be described later.

[0082] An insertion groove (455) is formed in the rear end of the trigger portion (450) to which the first elastic member (510), described later, is inserted and supported.

[0083] The operating member (400) may further include a connecting member (470) that interconnects the trigger member (450) and the pressurizing member (430). The rear end of the connecting member (470) is connected to the trigger member (450), and the front end of the connecting member (470) is connected to the pressurizing member (430). In this embodiment, the front end of the connecting member (470) is connected to the inner part of the pressurizing member (430).

[0084] In one embodiment of the present invention, the trigger part (450), the connecting part (470), the pressurizing part (430), and the damage inducing part (410) operate as a single unit.

[0085] The first elastic member (510) provides elastic force for advancing the operating member (400). The first elastic member (510) provides elastic force for a first advancing motion and a second advancing motion of the operating member (400).

[0086] The first elastic member (510) may have a coil spring shape extending in the front-rear direction. The first elastic member (510) is supported by the third body (600).

[0087] The third body (600) is coupled to the rear side of the first body (100). The third body (600) provides an internal space (600a) in which the first elastic member (510) is disposed and the trigger portion (450) of the operating member (400) can advance.

[0088] The rear end of the first elastic member (510) is supported on the inner rear portion of the third body (600), and the front end of the first elastic member (510) is supported on the trigger portion (450). At this time, the rear end of the first elastic member (510) is inserted into and supported by a support projection (612) formed on the inner rear portion of the third body (600), and the front end of the first elastic member (510) is inserted into and coupled with an insertion groove (455) formed on the rear end of the trigger portion (450).

[0089] The third body (600) may include a base body part (610) and a guide body part (630).

[0090] The base body portion (610) is formed so that a trigger portion (450) is disposed therein. The base body portion (610) forms an internal space (600a) in which a first elastic member (510) is disposed and the trigger portion (450) of the operating member (400) can advance.

[0091] The base body portion (610) has a side wall formed with a first locking part through hole (610a) through which the first locking part (710) of the first trigger (700), described later, passes. For example, the first locking part through hole (610a) through which the first locking part (710) of the first trigger (700) passes is formed on the side wall of the base body portion (610) that is far from the user's skin, i.e., the upper side wall.

[0092] The base body portion (610) is provided with a side wall having a second locking part through hole (610b) formed therein through which the second locking part (810) of the second trigger (800), described later, passes. For example, the side wall of the base body portion (610) that is close to the user's skin, i.e., the lower side wall, has a second locking part through hole (610b) formed therein through which the second locking part (810) of the second trigger (800) passes.

[0093] Furthermore, a storage groove (610c) is formed on the lower wall of the base body part (610) in which the second locking part through hole (610b) is formed, so that the second trigger body part (830) can be stored. The second locking part through hole (610b) and the storage groove (610c) are connected.

[0094] The base body (610) has a partially open box shape.

[0095] For example, the front side of the base body (610) may be open. The damage-inducing part (410) and the pressurizing part (430) of the operating member (400) may be introduced into the cylinder part (130) of the first body (100) through the open front side of the base body (610). The open front side of the base body (610) may be partially closed by coupling with the first body (100).

[0096] The base body portion (610) may include a plurality of sub-base body portions (610) that are coupled to each other. In this case, it is easy to place the trigger portion (450) of the operating member (400) in the internal space (600a) of the base body portion (610).

[0097] For example, the base body portion (610) includes a first sub-base body portion (610-1) positioned on the side closer to the user's skin and a second sub-base body portion (610-2) positioned on the side farther from the user's skin. The first sub-base body portion (610-1) and the second sub-base body portion (610-2) are combined to form an internal space (600a) that is open in the front-rear direction.

[0098] The open rear side of the assembly formed by combining the first sub-base body part (610-1) and the second sub-base body part (610-2) is closed by the third sub-base body part (610-3). That is, the third sub-base body part (610-3) functions as a cover that closes the rear side of the assembly.

[0099] A support projection (612) may be formed in the third sub-base body part (610-3) to which the rear end of the first elastic member (510) is inserted and supported.

[0100] A guide may be used to guide the trigger portion (450) of the operating member (400) advancing inside the base body portion (610).

[0101] For example, guide grooves (611) extending in the forward and backward direction are formed on both sides perpendicular to the forward and backward direction of the base body (610), and guide projections (457) that are inserted into the guide grooves (611) and move along the guide grooves (611) are formed on both sides perpendicular to the forward direction of the trigger part (450).

[0102] The guide body portion (630) is coupled to one side of the base body portion (610). A first locking part through hole (610a) is formed in the side wall of the base body portion (610) to which the guide body portion (630) is coupled, through which the first locking part (710) of the first trigger (700), described later, passes.

[0103] The guide body portion (630) operably supports and guides the first trigger (700) described later. The guide body portion (630) provides a guide space (630a) for the first insertion operation and the first ejection operation of the first trigger (700).

[0104] In one embodiment of the present invention, the first trigger (700) induces a first forward movement of the operating member (400).

[0105] More specifically, initially, the first trigger (700) performs a first insertion operation (see FIG. 5) to fix the position of the operating member (400). Then, the first trigger (700) performs a first discharge operation (not shown) by a first external force to induce a first forward movement of the operating member (400).

[0106] In one embodiment of the present invention, the first trigger (700) includes a first locking portion (710). The first locking portion (710) can enter and exit a first locking hole (451) formed in the trigger portion (450) of the operating member (400). For example, the first locking portion (710) may have a bar or rod shape that extends in an upward or downward direction, i.e., in a direction that approaches or moves away from the user's skin, corresponding to the first locking hole (451).

[0107] The first trigger (700) further includes a first trigger body portion (730). The first trigger body portion (730) is formed integrally with the first locking portion (710). The first locking portion (710) is formed on one side of the first trigger body portion (730).

[0108] The first trigger body part (730) is operably supported on the third body (600) to perform a first insertion operation (see FIG. 5) in which the first locking part (710) is inserted into the first locking hole (451) and a first discharge operation (not shown) in which the first locking part (710) is discharged from the first locking hole (451).

[0109] At this time, the first trigger body part (730) can move along the guide space (630a) provided inside the guide body part (630), which is a component of the third body (600).

[0110] When the first trigger (700) performs the first insertion operation initially, the first locking part (710) is inserted into the first locking hole (451) formed in the trigger part (450), and the first locking part (710) comes into contact with the inner rear portion of the first locking hole (451). In this case, the position of the operating member (400) can be fixed by the first trigger (700).

[0111] In one embodiment of the present invention, a first magnet (741) and a second magnet (742) may be used so that the first trigger (700) initially maintains the first insertion operation.

[0112] A first magnet (741) is fixedly installed in the first trigger body part (730), and a second magnet (743) corresponding to the first magnet (741) can be fixedly installed on the outer part of the base body part (610) facing the first trigger body part (730).

[0113] In this case, the first trigger body part (730) can be maintained in a state close to the base body part (610) within the guide body part (630) by the magnetic force of the first magnet (741) and the second magnet (743). At this time, the first locking part (710) of the first trigger (700) is inserted into the first locking hole (451), and the first trigger (700) can maintain a first insertion operation as shown in FIG. 5.

[0114] However, the first trigger (700) can maintain the first insertion operation without the first magnet (741) and the second magnet (743). Once the first trigger (700) performs the first insertion operation during the assembly process, the first locking part (710) is pressed by the rear portion of the inner surface defining the first locking hole (451) by the elastic force of the first elastic member (510). In this case, the first trigger (700) can maintain the first insertion operation.

[0115] In one embodiment of the present invention, the first trigger (700) performs a first discharge operation (not shown) by a first external force. The first discharge operation of the first trigger (700) causes a first forward movement of the operating member (400).

[0116] For example, the first external force is the magnetic force generated between the first magnet (741) and an external magnet (not shown). This will be described later.

[0117] The first magnet (741) is fixedly installed on the first trigger body part (730), and the external magnet is positioned adjacent to the guide body part (630). At this time, the external magnet is positioned adjacent to the side of the guide body part (630) that is far from the user's skin, i.e., the upper side.

[0118] In this case, the first trigger body part (730) moves away from the base body part (610) by the magnetic force generated between the external magnet and the first magnet (741). At this time, the first locking part (710) is discharged from the first locking hole (451), and the operating member (400) including the trigger part (450) performs a first forward movement.

[0119] Meanwhile, as previously explained, a first magnet (741) and a second magnet (743) may be used to maintain the first insertion operation of the first trigger (700).

[0120] At this time, the external magnet used to generate the first external force may have a stronger magnetic force than the second magnet (743). In this case, the magnetic force generated between the first magnet (741) and the external magnet is greater than the magnetic force generated between the first magnet (741) and the second magnet (743), so that the first trigger (700) can perform the first discharge operation.

[0121] In one embodiment of the present invention, the second trigger (800) induces a second forward movement of the operating member (400).

[0122] In one embodiment of the present invention, the second trigger (800) includes a second locking portion (810). The second locking portion (810) can enter and exit a second locking hole (453) formed in the trigger portion (450) of the operating member (400). For example, the second locking portion (810) may have a bar or rod shape extending in a direction closer to or further away from the user's skin, that is, in an up-and-down direction.

[0123] The second trigger (800) further includes a second trigger body portion (830). The second trigger body portion (830) is formed integrally with the second locking portion (810). The second locking portion (810) is formed on one side of the second trigger body portion (830).

[0124] The second trigger body part (830) is operably supported on the third body (600) to perform a second insertion operation (not shown) in which the second locking part (810) is inserted into the second locking hole (453) and a second discharge operation (see FIG. 5) in which it is discharged from the second locking hole (453).

[0125] The second trigger (800) is supported on the third body (600) by the second elastic member (530). Specifically, the second trigger (800) is supported on the base body portion (610) of the third body (600) by the second elastic member (530).

[0126] When the second trigger (800) performs the second insertion operation, the first locking part (710) can pass through the second locking part through hole (610b) and be inserted into the second locking hole (453) of the trigger part (450).

[0127] The second elastic member (530) may have a coil spring shape.

[0128] One end of the second elastic member (530) is fixed to the base body part (610), and the other end of the second elastic member (530) can be fixed to one side of the second trigger (800).

[0129] The second trigger body part (830) is initially exposed to the outside of the third body (600) by the second elastic member (530) as shown in FIG. 5. Subsequently, the second trigger body part (830) moves toward the third body (600) by an external force, such as a force pressing against the user's skin.

[0130] At this time, the second locking part (810) is inserted into the second locking hole (453). That is, the second trigger (800) performs the second insertion operation. At this time, the second elastic member (530) is compressed, and elastic energy is stored in the second elastic member (530).

[0131] When the second trigger body (830) is separated from the user's skin, the second trigger (800) returns to its original position by a second external force, such as the elastic force of the second elastic member (530). At this time, the second locking part (810) is discharged from the second locking hole (453). That is, the second trigger (800) performs a second discharge operation.

[0132] The second trigger (800) configured as above can operate as follows.

[0133] Initially, the second trigger (800) performs a second discharge operation.

[0134] Afterwards, when the needle (330) is inserted into the user's skin, the second trigger (800) can perform a second insertion action by the force of pressing against the user's skin.

[0135] At this time, the second locking part (810) is spaced apart from the inner rear portion of the second locking hole (453) by a predetermined distance. For example, the rear portion of the second locking part (810) and the inner rear portion of the second locking hole (453) are spaced apart by a predetermined distance. Due to this predetermined distance, the operating member (400) can advance first.

[0136] Subsequently, a first forward movement of the operating member (400) is performed by the first trigger (700). At this time, the second locking part (810) inserted into the first locking hole (451) comes into contact with the inner rear portion of the second locking hole (453). The first forward movement of the operating member (400) ends the moment the second locking part (810) comes into contact with the inner rear portion of the second locking hole (453).

[0137] Afterwards, the second trigger (800) performs a second discharge operation by means of a second external force to induce a second forward movement of the operating member (400).

[0138] As previously explained, when the second trigger (800) performs the second insertion operation before the first forward movement of the operating member (400), the second locking part (810) is spaced apart from the inner rear part of the second locking hole (453) by a predetermined distance.

[0139] The above predetermined interval is related to the first forward distance of the operating member (400). The operating member (400) that has started the first forward movement advances by the above predetermined interval and terminates the first forward movement when the second locking part (810) comes into contact with the inner rear part of the second locking hole (453).

[0140] In one embodiment of the present invention, an inclined surface inclined forward and upward may be formed on the upper rear side of the second locking part (810). At least a portion of this inclined surface (711) is inserted into the second locking hole (453) when the second trigger (800) performs a second insertion operation.

[0141] In this case, the gap between the inclined surface (711) inserted into the second locking hole (453) and the inner rear portion of the second locking hole (453) is larger than in the case where there is no inclined surface (711). In this case, the primary forward distance of the operating member (400) is larger than in the case where there is no inclined surface (711).

[0142] In one embodiment of the present invention, a first locking hole (451) is formed on the side opposite to the side facing the user's skin of the trigger part (450), and a second locking hole (453) is formed on the side facing the user's skin of the trigger part (450).

[0143] The first locking hole (451) and the second locking hole (453) can be connected to each other to form a single common hole. In this case, a single through hole is formed in the trigger part (450) and can be used as the first locking hole (451) and the second locking hole (453), thereby reducing processing time and cost.

[0144] The first locking part (710) and the second locking part (810) can be simultaneously inserted into the common holes, the first locking hole (451) and the second locking hole (453). When inserted simultaneously, the first locking part (710) and the second locking part (810) may have a shape that does not interfere with each other. For example, the first locking part (710) and the second locking part (810) may each have inclined surfaces (711, 811) that are opposite and spaced apart from each other while inserted into the first locking hole (451) and the second locking hole (453), respectively. At this time, the inclined surface (711) formed on the second locking part (810) has a function to increase the primary forward distance of the previously described operating member (400) in addition to the function of avoiding interference with the first locking part (710).

[0145] Referring to FIGS. 1 to 4, an externally attached drug delivery device (10) according to one embodiment of the present invention further includes a housing (900). The housing (900) surrounds a combination of a first body (100), a second body (200), and a third body (600).

[0146] The housing (900) may include a first housing (910) and a second housing (930).

[0147] The first housing (910) has a box shape. At this time, the first housing (910) may have a box shape with one side, for example, the side close to the user's skin, open.

[0148] And the second housing (930) closes one side of the open of the first housing (910). For example, the second housing (930) may have a plate shape.

[0149] A through hole (900a, 900b) may be formed on the side of the housing (900) close to the user's skin to expose the needle (330) and the second trigger (800) to the outside of the housing (900), respectively.

[0150] FIGS. 8 to 11 are drawings for explaining the operation of an externally attached drug delivery device according to one embodiment of the present invention.

[0151] First, referring to FIG. 8, a therapeutic drug (51) is initially received in the first space (100a) of the first body (100), and a mixing liquid (53) is received in the second space (200a) of the second body (200). Then, the first trigger (700) performs a first insertion operation, and the second trigger (800) performs a second discharge operation.

[0152] At this time, the first locking part (710) of the first trigger (700) is inserted into the first locking hole (451) of the trigger part (450) of the operating member (400), and the second locking part (810) of the second trigger (800) is discharged from the second locking hole (453) of the trigger part (450).

[0153] At this time, the first elastic member (510) stores elastic energy in a compressed state between the third body (600) and the trigger part (450), but the trigger part (450) is fixed in position by the first locking part (710) of the trigger part (450) inserted into the first locking hole (451).

[0154] At this time, the pressurizing part (430) of the operating member (400) is located inside the cylinder part (130) of the first body (100). At this time, the pressurizing part (430) is located behind the needle penetration hole (110d) formed in the first body (100).

[0155] At this time, one end of the needle (330) is positioned inside the cylinder part (130) by the needle penetration hole (110d), and the other end of the needle (330) is exposed to the outside on the side facing the skin of the user of the externally attached drug delivery device (10).

[0156] At this time, the second trigger body portion (830) of the second trigger (800) is exposed to the outside on the side facing the skin of the user of the externally attached drug delivery device (10).

[0157] Then, referring to FIG. 9, the externally attached drug delivery device (10) is inserted into the user's skin. At this time, the second trigger (800) performs a second insertion operation by the force of pressing against the skin. At this time, the second elastic member (530) that elastically supports the second trigger (800) against the third body (600) is compressed.

[0158] The side of the externally attached drug delivery device (10) facing the skin may come into surface contact with the skin. At this time, an adhesive layer (not shown) may be formed on the side of the externally attached drug delivery device (10) or the housing (900) facing the skin. The adhesive layer facilitates the externally attached drug delivery device (10) on the skin.

[0159] At this time, the second locking part (810) inserted into the second locking hole (453) does not come into contact with the inner rear part of the second locking hole (453).

[0160] At this time, the first locking part (710) of the first trigger (700) and the second locking part (810) of the second trigger are placed together inside the common holes, the first locking hole (451) and the second locking hole (453). At this time, the first locking part (710) and the second locking part (810) do not interfere with each other due to the inclined surface (711) formed on the first locking part (710) and the second locking part (810), respectively.

[0161] Then, referring to FIG. 10, the first trigger (700) performs a first discharge operation by a first external force. Here, the first external force is a magnetic force generated between the first magnet (741) installed in the first trigger body part (730) of the first trigger (700) and the external magnet (745).

[0162] The external magnet (745) can be positioned close to the first magnet (741) in a direction facing the first magnet (741).

[0163] At this time, the first locking part (710) of the first trigger (700) is discharged from the first locking hole (451), and the trigger part (450) of the operating member (400) performs a first forward movement by the elastic force of the first elastic member (510). At this time, the first forward movement of the operating member (400) ends when the second locking part (810) comes into contact with the inner rear part of the second locking hole (453).

[0164] When the trigger part (450) moves forward in the first forward motion, the pressurizing part (430) placed inside the cylinder part (130) also moves forward together. In this case, the pressure in the first space (100a) increases, and the therapeutic drug (51) contained in the first space (100a) is injected under the skin through the needle (330).

[0165] When the first forward movement of the operating member (400) is completed, the damage-inducing part (410) of the operating member (400) is located behind the barrier (310). At this time, the damage-inducing part (410) does not damage the barrier (310).

[0166] Then, referring to FIG. 11, when the externally attached drug delivery device (10) is separated from the skin, the second trigger (800) performs a second discharge operation by a second external force. Here, the second external force is the elastic force stored when the second elastic member (530) is compressed.

[0167] By utilizing the elastic force of the second elastic member (530), the second discharge operation of the second trigger (800) can be automatically performed at the moment the externally attached drug delivery device (10) is separated from the skin.

[0168] When the second trigger (800) performs a second discharge operation, the operating member (400) performs a second forward operation. At this time, the damage-inducing part (410) of the operating member (400) advances and damages the barrier (310). In this case, the therapeutic drug (51) remaining in the first space (100a) and the mixing liquid (53) contained in the second space (200a) are mixed. The therapeutic drug (51) mixed with the mixing liquid (53) can no longer be recycled.

[0169] When the second forward movement of the operating member (400) is finished, the pressurizing member (430) is positioned further forward than the needle penetration hole (110d) to prevent the mixed liquid inside the first body (100) and the second body (200) from being discharged to the outside through the needle (330).

[0170] The externally attached drug delivery device (10) according to the embodiment described above operates such that when a user attaches the externally attached drug delivery device (10) to the skin and injects a therapeutic drug (51) under the skin, and then separates it from the skin, the therapeutic drug (51) remaining in the externally attached drug delivery device (10) is mixed with a mixing liquid (53), making reuse impossible. By using such an externally attached drug delivery device (10), misuse caused by the reuse of the therapeutic drug (51) remaining in the device can be effectively prevented.

[0171] Meanwhile, FIG. 12 is a drawing showing a first trigger according to another embodiment of the present invention. Referring to FIG. 12, the first trigger (700') includes a first locking part (710') and a first trigger body part (730').

[0172] The first locking part (710') enters and exits the first locking hole (651) formed on one side wall of the third body (600'). At this time, the first locking hole (651) has the shape of a through hole. The first locking part (710') is inserted into the first locking hole (710') inside the third body (600'). Then, the first locking part (710') is discharged from the first locking hole (651) and flows into the interior of the third body (600').

[0173] The first trigger body part (730') is formed integrally with the first locking part (710'). The first trigger body part (730') is operably supported on the trigger part (450') to perform a first insertion operation (see FIG. 12) in which the first locking part (710') is inserted into the first locking hole (651) and a first discharge operation (not shown) in which the first locking part (710') is discharged from the first locking hole (651).

[0174] The first trigger body portion (730') may have a bar shape that extends obliquely toward the first locking hole (651) from one side of the trigger portion (450'). This first trigger body portion (730') may be elastically deformed in a direction toward or toward the trigger portion (450').

[0175] One end of the first trigger body part (730') is supported by the trigger part (450'), and the other end of the first trigger body part (730') has a first locking part (710') formed thereon.

[0176] The first trigger (700') having such a structure is similar to, for example, the trigger structure of a ballpoint pen for inserting a refill exposed from the pen case into the pen case. When the ballpoint pen user presses the trigger structure of the ballpoint pen into the pen case, the refill is fed into the pen case.

[0177] When the first trigger (700') performs a first insertion operation as shown in FIG. 12, the first locking part (710') is inserted into a first locking hole (651) formed on one side wall of the third body (600'), and the first locking part (710') comes into contact with the inner rear part of the first locking hole (651). In this case, the position of the operating member including the trigger part (450') can be fixed by the first trigger (700').

[0178] The first trigger (700') performs a first discharge operation (not shown) by a first external force. The first discharge operation of the first trigger (700') causes a first forward movement of an operating member including a trigger part (450').

[0179] In this embodiment, the first external force is a force that presses the first locking part (710'), which is exposed to the outside of the third body (600') through the first locking hole (651), into the inside of the third body (600'). At this time, the user may press the first locking part (710') into the inside of the third body (600') with their hand or with a long auxiliary tool.

[0180] Although embodiments of the present invention have been described above, the spirit of the present invention is not limited by the embodiments presented in this specification. Those skilled in the art who understand the spirit of the present invention may easily propose other embodiments within the scope of the same spirit by adding, changing, deleting, or adding components, and such are also to be considered to fall within the scope of the spirit of the present invention. Explanation of the symbols

[0181] 10 : External drug delivery device 51 : Therapeutic drug 53 : Mixing liquid 100 : First body 100a : First space 110 : Body part 111 : Plug 110d : Needle through hole 113: Deformation section 120: Auxiliary barrier 130 : Cylinder part 130a : Internal space 150 : Cartridge mounting part 200 : Second body 200a : Second space 310 : Barrier 330 : Needle 331 : Support 340 : Cartridge 400 : Operating member 410 : Damage induction part 430 : Pressurization part 450: Trigger part 451: First locking hole 453 : Second locking hole 455 : Insertion groove 457 : Guide projection 470 : Connection part 510 : First elastic member 530 : Second elastic member 600 : Third body 610: Base body part 610a: First locking part through hole 610b: Second locking part through hole 610c: Storage groove 611 : Guide Home 610-1 : 1st Sub-base Body 610-2: Second sub-base body part 610-3: Third sub-base body part 612 : Support projection 630 : Guide body part 630a : Guide space 700 : 1st trigger 710 : First catch 711 : Inclined surface 730: 1st trigger body part 741: 1st magnet 743: Second magnet 745: Outer magnet 800: 2nd trigger 810: 2nd locking part 830 : Second trigger body 900 : Housing 910: 1st Housing 930: 2nd Housing

Claims

Claim 1 An externally attached drug delivery device comprising: a first body providing a first space for receiving a therapeutic drug; a second body providing a second space for receiving a mixing liquid and positioned in front of the first space, and coupled to the front side of the first body; a barrier interposed between the first space and the second space to separate the first space and the second space; a needle supported by the first body, having one end connected to the first space and the other end exposed to the outside of the first body so as to be inserted into the user's skin; and an operating member having its front end initially positioned behind the barrier and performing two forward movements, wherein during the first forward movement, the internal pressure of the first space is increased to discharge the therapeutic drug received in the first space through the needle, and during the second forward movement, the barrier is damaged to mix the mixing liquid with the therapeutic drug remaining in the first space. Claim 2 An externally attached drug delivery device according to claim 1, wherein the first forward movement of the operating member is performed after the needle is inserted into the user's skin, and the second forward movement of the operating member is performed after the needle is separated from the user's skin. Claim 3 An externally attached drug delivery device according to claim 1, wherein the first body comprises: a body portion having an internal space formed therein that is used as the first space; and a cylinder portion formed integrally with the body portion, having a tube shape extending in the front-rear direction, and connected to the internal space of the body portion. Claim 4 In paragraph 3, the body portion and the cylinder portion share a portion of the side portion facing the user's skin, and in the shared portion shared by the body portion and the cylinder portion, a needle penetration hole is formed through which the needle penetrates so that one end of the needle is positioned in the hollow of the cylinder portion, the needle penetration hole is closed by an auxiliary barrier, and the auxiliary barrier is formed to be partially perforated by the needle, an externally attached drug delivery device. Claim 5 An externally attached drug delivery device according to claim 4, wherein a deformation portion is formed on one side wall of the body portion, the size of which varies according to the pressure change of the first space. Claim 6 An externally attached drug delivery device according to claim 4, wherein the first body further comprises a cartridge mounting portion integrally formed on the outer side of the side facing the user's skin of the body portion and a needle cartridge supporting the needle is mounted thereon. Claim 7 In claim 6, the above needle is formed integrally with a plate-shaped support, and the support is mounted on the cartridge, an externally attached drug delivery device. Claim 8 In paragraph 3, the operating member comprises: a pressurizing member that is initially positioned inside the cylinder portion and advances along the cylinder portion during the first advance movement to increase the pressure of the first space; and a damage-inducing member that is positioned in front of the pressurizing member and damages the barrier during the second advance movement, an externally attached drug delivery device. Claim 9 An externally attached drug delivery device according to claim 1, further comprising: a first elastic member providing elastic force for advancing the operating member; and a third body coupled to the rear side of the first body and supporting the first elastic member. Claim 10 An externally attached drug delivery device according to claim 9, further comprising: a first trigger that causes the first forward movement of the operating member; and a second trigger that causes the second forward movement of the operating member. Claim 11 In claim 10, the above-mentioned operating member further comprises a trigger portion disposed inside the third body and interlocking with the first trigger and the second trigger, an externally attached drug delivery device. Claim 12 In claim 11, the first trigger comprises: a first locking part that enters and exits a first locking hole formed in the trigger part; and a first trigger body part formed integrally with the first locking part and operably supported on the third body to perform a first insertion operation in which the first locking part is inserted into the first locking hole and a first discharge operation in which the first locking part is discharged from the first locking hole, wherein initially the first trigger performs the first insertion operation and the first locking part contacts the inner rear portion of the first locking hole, and when the first trigger performs the first discharge operation by a first external force, the operating member performs the first forward movement by the first elastic member, an externally attached drug delivery device. Claim 13 In claim 12, the third body comprises: a base body portion having a side wall formed such that the trigger portion is disposed therein and a first locking portion through hole through which the first locking portion inserted into the first locking hole passes; and a guide body portion coupled to the outside of the side wall of the base body portion and operably supporting the first trigger body portion. Claim 14 An externally attached drug delivery device according to claim 13, wherein a first magnet is fixedly installed in the first trigger body portion, and a second magnet corresponding to the first magnet is fixedly installed in the outer portion of the base body portion facing the first trigger body portion. Claim 15 An externally attached drug delivery device according to claim 13, wherein a first magnet is fixedly installed in the first trigger body part, and the first external force is a magnetic force generated between the first magnet and an external magnet adjacent to the guide body part. Claim 16 In claim 11, the first trigger comprises: a first locking part that enters and exits a first locking hole formed on one side wall of the third body; and a first trigger body part formed integrally with the first locking part and operably supported by the trigger part to perform a first insertion operation in which the first locking part is inserted into the first locking hole and a first discharge operation in which the first locking part is discharged from the first locking hole, wherein initially the first trigger performs the first insertion operation and the first locking part contacts the inner rear portion of the first locking hole, and when the first trigger performs the first discharge operation by a first external force, the operating member performs the first forward movement by the first elastic member, an externally attached drug delivery device. Claim 17 In claim 16, the above-mentioned first external force is a force that presses the first locking part, which is exposed to the outside through the first locking hole, into the interior of the third body, an externally attached drug delivery device. Claim 18 In claim 11, the second trigger comprises a second locking part insertable into a second locking hole formed in the trigger part; The externally attached drug delivery device comprises a second trigger body portion formed on one side of the second locking portion and operably supported on the third body to perform a second insertion operation in which the second locking portion is inserted into the second locking hole and a second discharge operation in which the second locking portion is discharged from the second locking hole, wherein initially the second trigger performs the second discharge operation, and when the needle is inserted into the skin of the user, the second trigger performs the second insertion operation by a force pressing on the skin of the user, and the second locking portion is spaced apart from the inner rear portion of the second locking hole by a predetermined distance, and when the operating member performs the first forward movement, the second locking portion contacts the inner rear portion of the second locking hole, and when the needle is separated from the skin of the user, the second trigger performs the second discharge operation by a second external force, and the operating member performs the second forward movement. Claim 19 In claim 18, the above-mentioned third body is an externally attached drug delivery device having a side wall formed with a second locking part through hole through which the second locking part inserted into the second locking hole passes. Claim 20 An externally attached drug delivery device according to claim 18, wherein the second trigger is supported by the third body by a second elastic member, the second elastic member is compressed when the second insertion action is performed by the force with which the second trigger is pressed against the user's skin, and the second external force is an elastic force due to the compression of the second elastic member. Claim 21 In claim 11, a first locking hole is formed on the side opposite to the side facing the user's skin of the trigger portion through which the first locking portion of the first trigger enters and exits, and a second locking hole is formed on the side facing the user's skin of the trigger portion through which the second locking portion of the second trigger enters and exits, and the first locking hole and the second locking hole are connected to each other to form a common hole, an externally attached drug delivery device.

Images