KR102351143B1 - Apparatus for Infusing medical liquid - Google Patents

Abstract

The present invention provides a medicament injection device, it has a base body, a needle assembly mounted on the base body, a reservoir mounted on the base body and arranged with a plunger disposed in an inner space, and a drive shaft, the plunger and a driving module that generates a moving driving force, and a trigger member that is rotatably disposed on one side of the base body and that a contact is released from an end of the driving shaft by rotation to start driving the driving module.

Description

Chemical injection device {Apparatus for Infusing medical liquid}

The present invention relates to a drug injection device.

In general, a drug injection device such as an insulin injection device is used to inject a drug solution into a patient's body. Although such a drug injection device is sometimes used by professional medical staff such as doctors or nurses, in most cases, it is used by ordinary people such as patients themselves or their guardians.

Diabetic patients, especially pediatric diabetic patients, need to inject a drug solution such as insulin into the body at a predetermined interval. A drug injection device in the form of a patch that is attached to the human body for a certain period of time has been developed, and the drug injection device can be used in a state of being attached to the body in the form of a patch for a certain period of time, such as a patient's abdomen or waist.

In order to increase the effect through drug injection, the drug injection device needs to be controlled to precisely inject the drug into the patient's body.

When attached to the human body, the chemical injection device needs to be comfortable to wear, easy to use, durable, and operated with low power. In particular, since the drug injection device is used by being directly attached to the skin of a patient, it is important for the user to conveniently and safely drive the drug injection device.

The present invention provides a medicament injection device that can safely operate and accurately deliver a drug.

One aspect of the present invention has a base body, a needle assembly mounted on the base body, a reservoir mounted on the base body and having a plunger disposed in an inner space, and a driving shaft, the driving force for moving the plunger It provides a drug injection device including a driving module for generating a, rotatably disposed on one side of the base body, the contact is released from the end of the driving shaft by rotation, and a trigger member for starting the driving of the driving module.

In addition, the needle assembly rotates one end of the trigger member by rotating in one direction to rotate the trigger member, and the other end of the trigger member may be separated from the end of the drive shaft by rotation.

In addition, it is mounted on the base body, arranged to support the end of the trigger member, may further include a starter for urging the moving end mounted on the end of the drive shaft by rotation of the trigger member.

In addition, the driving module may include a contact member mounted on the driving shaft to contact the inner surface of the housing, and the starter may apply the moving end to linearly move the driving shaft and the contact member.

Also, the contact member may be moved on the inner surface of the housing before the driving module is driven.

In addition, the base body may include a stopper for limiting the rotation distance of the trigger member.

The drug injection device and the driving method thereof according to the present invention can be operated simply and safely by a user. When the user rotates the sleeve of the needle assembly, the cannula is inserted into the object in the needle assembly, and the clutch unit connects the drive unit to inject the chemical solution by driving the drive module, and at the same time, the drive module is started, You can use the drug injection device simply and safely.

Since the driving module is driven in an optimized driving environment in the chemical injection device and the driving method thereof according to the present invention, it is possible to discharge the chemical in a fixed amount. The starter moves the position of the driving shaft before the driving module is driven, so that the contact member is attached to the inner surface of the driving module to prevent the driving of the driving module from being obstructed. Since the storability of the drug injection device is improved and precision is maintained, even if it is driven after being stored for a long time, the driving module is smoothly driven in the initial stage so that the drug solution can be dispensed in a fixed amount to the object.

In the drug injection device and the driving method thereof according to the present invention, after the cannula of the needle assembly is inserted into the subject, the structure for discharging the drug by the clutch unit is driven and connected, so it is safe to inject the drug into the subject. can

The drug injection device and its driving method according to the present invention are intuitively started by rotation of the needle assembly, and the rotation directions of the needle assembly and the trigger member are limited to one direction, and the rotation distance is limited to a preset distance, User safety can be ensured. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing a chemical injection device according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating an internal arrangement of the chemical injection device of FIG. 1 .
3 is a plan view illustrating the chemical liquid injection device of FIG. 2 .
4A to 4C are cross-sectional views illustrating the operation of the needle assembly of FIG. 2 .
5A to 5C are views illustrating, from one side, driving of a driving module according to rotation of the trigger member of FIG. 2 .
6A to 6C are views illustrating driving of a driving module according to rotation of the trigger member of FIG. 2 from another side.
7 is a flowchart illustrating a method of driving a chemical injection device according to another embodiment of the present invention.
8 is a flowchart illustrating some steps of FIG. 7 .

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility that one or more other features or components will be added is not excluded in advance.

In cases where certain embodiments may be implemented otherwise, a specific process sequence may be performed different from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the following embodiment is not necessarily limited to the illustrated bar.

1 is a perspective view illustrating a chemical injection device 1 according to an embodiment of the present invention.

Referring to FIG. 1 , the drug injection device 1 may be attached to a drug injection object, and may inject a drug solution stored therein in a predetermined amount to the user. In an optional embodiment, the drug injection device 1 may be mounted on the user's body. In addition, in another optional embodiment, the drug injection device 1 may be mounted on an animal to inject the drug solution.

The chemical liquid injection device 1 may be used for various purposes according to the type of the chemical liquid to be injected. For example, the drug may include an insulin-based drug for diabetic patients, and may include other drugs for the pancreas, a drug for the heart, and other various kinds of drugs.

The drug injection device 1 may be connected to the remote device 2 connected by wire or wirelessly. The user may operate the remote device 2 to use the chemical injection device 1 , and may monitor the usage state of the chemical injection device 1 . For example, the amount of the drug injected from the drug injection device 1, the number of injections of the drug, the amount of the drug stored in the reservoir 200, the user's bio-information, etc. can be monitored, and based on this, the user can use the drug injection device (1) can be driven.

In one embodiment, the remote device 2 refers to a communication terminal capable of using an application in a wired/wireless communication environment. Here, the remote device 2 may be a user's portable terminal. In more detail, the remote device 2 may include a computer (eg, desktop, laptop, tablet, etc.), a media computing platform (eg, cable, satellite set-top box, digital video recorder), a handheld computing device (eg, For example, PDAs, e-mail clients, etc.), any type of mobile phone, any type of wearable device that can be attached to or mounted on the user's body, or any other type of computing or communication platform. However, the present invention is not limited thereto.

The drug injection device 1 and the remote device 2 may communicate via a communication network. In this case, the communication network means a communication network that provides a connection path so that the remote device 2 can transmit and receive data after accessing the service server (not shown). The communication network includes, for example, wired networks such as LANs (Local Area Networks), WANs (Wide Area Networks), MANs (Metropolitan Area Networks), and ISDNs (Integrated Service Digital Networks), or wireless networks such as wireless LANs, CDMA, Bluetooth, and satellite communication. may be covered, but the scope of the present invention is not limited thereto.

1 , the remote device 2 is illustrated as a single device, but the present invention is not necessarily limited thereto, and may include a plurality of devices capable of communicating with the medicament injection device 1 .

FIG. 2 is a perspective view illustrating an internal arrangement of the chemical injection device 1 of FIG. 1 according to an embodiment, and FIG. 3 is a plan view illustrating the chemical injection device 1 of FIG. 2 .

1 to 3 , an embodiment of the drug injection device 1 may include a housing 5 covering the outside, and an attachment part 6 positioned adjacent to the user's skin. The chemical liquid injection device 1 includes a plurality of parts disposed in the inner space between the housing 5 and the attachment part 6 . A separate bonding means may be further interposed between the attachment part 6 and the user's skin, and the chemical injection device 1 may be fixed to the skin by the bonding means.

The chemical injection device 1 includes a base body 50 , a needle assembly 100 , a reservoir 200 , a driving module 300 , a driving unit 400 , a clutch unit 500 , a trigger member 600 , and a battery. 700 may be included.

The base body 50 forms a basic frame of the housing 5 , and is mounted in the inner space of the housing 5 . The base body 50 may be provided in plurality. In one embodiment, a first body 50a that covers upper sides of the internal parts and a second body 50b that covers lower sides of the internal parts may be provided. The first body 50a and the second body 50b may be assembled to fix the internal components of the chemical injection device 1 at a preset position. In another embodiment, the base body may be formed as an integral single frame.

The base body 50 may provide a space in which the trigger member 600 can rotate. The base body 50 supports the trigger member 600 , and the trigger member 600 may rotate based on the rotation shaft 51 protruding from the base body 50 .

The base body 50 may include a stopper that limits the rotation distance of the trigger member 600 . A plurality of stoppers may be provided, and a movement distance of the trigger member 600 may be limited so that the trigger member 600 rotates to a preset point. According to an embodiment, the stopper may include a first stopper 52 and a second stopper 53 .

Referring to FIG. 5A , the first stopper 52 protrudes upward from the base body 50 and is disposed adjacent to the needle assembly 100 . The first stopper 52 is disposed to contact the first end 610 of the trigger member 600, and rotates with the rotation direction so that the first end 610 does not rotate in the opposite direction after rotating in one direction. distance can be limited.

In detail, the first stopper 52 may include an upper surface 52a formed so that a surface in contact with the trigger member 600 protrudes obliquely. When the first end 610 of the trigger member 600 rotates in one direction, the first end 610 moves along the upper surface 52a of the first stopper 52 . Since the upper surface 52a of the first stopper 52 guides the movement of the trigger member 600 , the needle assembly 100 can smoothly drive the trigger member 600 by rotation.

The first stopper 52 may have a sidewall 52b that limits the rotation direction of the trigger member 600 . The sidewall 52b may extend from the upper surface 52a and be formed substantially perpendicular to the plane of the base body 50 . The side wall 52b prevents the needle assembly 100 and the trigger member 600 from rotating in the opposite direction after the trigger member 600 rotates by a preset rotation distance in one direction to prevent the drug injection device 1 stability can be ensured.

The second stopper 53 is disposed adjacent to the reservoir 200 , the driving unit 400 , and the clutch unit 500 . The second stopper 53 may be disposed to protrude from the base body 50 as well, thereby limiting the moving distance of the second end 620 of the trigger member 600 . In an embodiment, the second stopper 53 may have a longitudinal extension line passing through the center of the rotation shaft 51 .

4A to 4C are cross-sectional views illustrating the operation of the needle assembly 100 according to an embodiment.

4A to 4C , the needle assembly 100 may be mounted on the base body 50 . The needle assembly 100 is rotated so that the needle (N) and/or the cannula (C) can move in the axial direction. The needle assembly 100 may include a sleeve 110, an elastic member 120, a first holder 130, a second holder 140, a needle (N), a cannula (C) and a patch (P). have.

The sleeve 110 forms the exterior of the needle assembly 100, and may rotate about a central axis in the longitudinal direction. An elastic member 120 is disposed inside the sleeve 110 , so that the sleeve 110 may receive expansion force from the elastic member 120 .

A knob 101 may be disposed outside the sleeve 110 . When the needle assembly 100 rotates, the knob 101 may apply the first end 610 of the trigger member 600 to rotate the trigger member 600 .

A moving protrusion 115 may be disposed on the inner surface of the sleeve 110 . The moving protrusion 115 may move along the guide groove 131 disposed on the outer circumferential surface of the first holder 130 . When the sleeve 110 rotates, the moving protrusion 115 moves along the sidewalls of the guide groove 131 so that the first holder 130 may be raised or lowered.

The elastic member 120 may be disposed between the sleeve 110 and the first holder 130 . When the elastic member 120 expands, the first holder 130 may be moved downward. Also, when the first holder 130 moves upward, the elastic member 120 may be compressed.

The first holder 130 may support the needle (N). Since the needle (N) is inserted and fixed to one side of the first holder (130), when the first holder (130) moves in the axial direction, the needle (N) also moves. The first holder 130 is disposed in the inner space of the sleeve 110, the elastic member 120 is disposed on the upper portion.

The first holder 130 may have a guide groove 131 on its outer surface. The guide groove 131 may guide the movement of the moving protrusion 115 . When the sleeve 110 rotates, the moving protrusion 115 moves along a preset path formed by the guide groove 131 , so that the first holder 130 can be raised or lowered.

The guide groove 131 may include a first stop groove 131a, an elevation groove 131b, an inclined groove 131c, a second stop groove 131d, and a movement limiting groove 131e. The first stop groove 131a is a groove in which the moving protrusion 115 is initially located, and the elastic member 120 maintains a contracted state. The elevating groove 131b extends in the longitudinal direction of the first holder 130 . When the elastic member 120 expands, the first holder 130 descends and the moving protrusion 115 moves along the elevating groove 131b. The inclined groove 131c extends to have a preset inclination. When the moving protrusion 115 moves along the inclined groove 131c, the elastic member 120 contracts again and the first holder 130 rises again. The second stop groove 131d is a groove in which the moving protrusion 115 returns to its initial position, and at this time, the elastic member 120 maintains a contracted state again.

The second holder 140 is disposed to face one side of the first holder 130 and can support the cannula (C). The second holder 140 is formed of a flexible material, and when an external force is applied, its shape may be instantaneously deformed.

The second holder 140 maintains contact with the first holder 130 in the positions of FIGS. 4A and 4B , but when the elastic member 120 contracts again as shown in FIG. 4C , it is separated from the first holder 130 and is separated from the base. It is fixed to the body 50 .

The cannula (C) is inserted into the center of the central body (141), and the needle (N) may be selectively coupled according to the movement of the first holder (130). The central body 141 may contact the lower end of the first holder 130 .

The locking protrusion 142 may protrude outward from the central body 141 and may be formed to be flexible. A plurality of locking protrusions 142 may be provided. Referring to FIG. 4C , the locking protrusion 142 is fixed to the ledge part 55 when the second holder 140 is lowered, and is fixed to the base body 50 even when the first holder 130 is raised again. have.

The sensor 143 may be disposed on one side of the locking protrusion 142 . However, the present invention is not limited thereto, and may be disposed on the outer surface of the central body 141 . The sensor 143 may detect whether the cannula C is correctly inserted into the user's skin. The sensor 143 may sense a contact between the second holder 140 and the base 40 .

In detail, since the second holder 140 moves beyond the ledge portion 55 when it moves downward, the sensor 143 may measure whether the second holder 140 is in contact with the contact portion 45 disposed on the upper portion of the base 40 . . When the sensor 143 is formed of a conductive material and comes into contact with the contact part 45 , an electrical signal is generated, and the controller (not shown) can check whether the second holder 140 is inserted.

Since the needle (N) is fixed to the first holder (130), it can be inserted into or released from the cannula (C) by the axial movement of the first holder (130). One end of the needle (N) may be connected to the reservoir 200 to deliver the drug, and the other end may be inserted into the cannula (C) to move along the cannula (C).

Since the cannula C is fixed to the second holder 140 , it can be inserted into the user's skin by the axial movement of the second holder 140 . Since the cannula (C) has a conduit shape that can accommodate the needle (N), the drug solution discharged from the needle (N) can be injected to the user.

The patch (P) is supported on the base (40), it is possible to fix the position of the cannula (C). Since the end of the cannula (C) is supported on the patch (P), it is possible to prevent the cannula (C) from being separated during storage or movement.

As shown in Figure 4a, the needle (N) and the cannula (C) is initially disposed on the inside of the needle assembly (100). When the user first rotates the sleeve 110, the moving protrusion 115 moves in the i-direction to exceed the first stop groove 131a.

As shown in FIG. 4B , the first holder 130 descends by the expansion force of the elastic member 120 . The moving protrusion 115 does not actually move in the axial direction, but moves in the j-direction along the elevating groove 131b relative to the first holder 130 by descending of the first holder 130 . The first holder 130 and the second holder 140 descend together, and the needle N and the cannula C pass through the patch P and are inserted into the object.

As shown in FIG. 4C , when the user rotates the sleeve 110 a second time, the moving protrusion 115 moves in the k direction along the inclined groove 131c and is inserted into the second stop groove 131d. The second holder 140 is fixed by the ledge part 55 , but the first holder 130 rises according to the rotation of the sleeve 110 , and the elastic member 120 moves to the rise of the first holder 130 . is recontracted by

At this time, the cannula (C) remains inserted into the user's skin, but the needle (N) rises and is separated from the object. However, since the cannula (C) and the needle (N) are fluidly connected, the drug solution injected from the reservoir 200 may be injected to the user through the needle (N) and the cannula (C).

In the drug injection device 1 , the user simply rotates the needle assembly 100 , inserts the cannula C into the object, and initiates the drug injection. The drug injection device 1 may be driven by a user first rotating the sleeve 110 to insert the cannula C into the object, and the knob 101 to apply the trigger member 600 . More preferably, in a state in which the needle N is withdrawn from the subject, and only the cannula C is inserted into the subject, as shown in FIG. 4c , the knob 101 applies the trigger member 600 to deliver the drug solution. The driving module 300 may be driven, and the chemical liquid may be quantitatively discharged from the reservoir 200 . Accordingly, the user can conveniently and stably use the chemical injection device 1 .

Referring back to FIGS. 2 and 3 , the reservoir 200 is mounted on the base body 50 and is connected to the needle assembly 100 . The reservoir 200 may have a plunger (not shown) linearly moved therein, thereby discharging the chemical solution to the needle (N).

The driving module 300 may generate a driving force and transmit the driving force to the driving unit 400 . The driving force transmitted by the driving unit 400 may linearly move the plunger 230 inside the reservoir 200 to discharge the chemical.

As the driving module 300 , all kinds of devices having a chemical liquid suction power and a chemical liquid discharge power can be used by electricity. For example, all kinds of pumps such as mechanical displacement type micropumps and electromagnetic motion type micropumps can be used. A mechanical displacement micropump is a pump that uses the motion of a solid or fluid, such as a gear or diagram, to generate a pressure difference to induce the flow of a fluid. Diaphragm displacement pump, fluid displacement pump ), and a rotary pump. Electromagnetic motion micropumps are pumps that directly use electrical or magnetic energy to move a fluid. Electrohydrodynamic pumps (EHD), electroosmotic pumps, magnetohydrodynamic pumps ( Magneto hydrodynamic pump), electrowetting pump, etc.

When the driving unit 400 is engaged by the clutch unit 500 , the driving module 300 rotates the driving wheel 420 of the driving unit 400 , and the load is generated by the rotation of the driving wheel 420 . By linear movement, the plunger (not shown) may move in the reservoir 200 .

The driving module 300 may include a membrane 320 disposed inside the cover 310 . The membrane 320 may divide the inner space of the driving module 300 into a first space S1 and a second space S2 . The driving module 300 may linearly move the driving shaft 330 by a volume change of the first space S1 and the second space S2 .

The membrane 320 may have a porous structure in which fluid and ions can move. The membrane 320 may be, for example, a frit-type membrane manufactured by thermally calcining spherical silica. For example, the spherical silica used to form the membrane may have a diameter of about 20 nm to about 500 nm, specifically, it may have a diameter of about 30 nm to about 300 nm, and more specifically, about 40 nm. It may have a diameter of about 200 nm to about 200 nm. When the diameter of the spherical silica satisfies the above-mentioned range, a pressure caused by the first fluid passing through the membrane 320 , that is, a pressure sufficient to move the driving shaft 330 may be generated.

Although it has been described that the membrane 320 includes spherical silica in the above embodiment, the membrane 320 is not limited thereto. In another embodiment, if the membrane 320 is a material capable of causing an electrokinetic phenomenon due to zetapotential, such as porous silica or porous alumina, the type is not limited.

The membrane 320 may have a thickness of about 20 μm to about 10 mm, specifically, a thickness of about 300 μm to about 5 mm, and more specifically, a thickness of about 1,000 μm to about 4 mm. can have

A first electrode body 321 and a second electrode body 322 are respectively disposed on both sides of the membrane 320 . The first electrode body 321 and the second electrode body 322 may each have a porous plate shape.

Each of the porous plates may be disposed to contact both main surfaces of the membrane 320 . The porous plate can effectively move fluids and ions through the porous structure. The porous plate may have a structure in which an electrochemical reaction material is formed on a porous base layer. The electrochemical reactive material may be formed by, for example, electrodeposition or coating on the porous base layer through a method such as electroless plating, vacuum deposition, coating, or a sol-gel process.

The porous base layer may have a pore size of about 0.1 μm to about 500 μm, specifically, a pore size of about 5 μm to about 300 μm, and more specifically, a pore size of about 10 μm to about 200 μm. can have size. When the pore size of the porous base layer satisfies the above-mentioned range, it is possible to effectively move the fluid and ions, thereby improving the stability and lifespan characteristics and efficiency of the driving module 300 .

The driving shaft 330 is disposed on one side of the cover 310 and may move linearly according to the volume change of the first space S1 and the second space S2 . When the redox reaction occurs in the first electrode body 321 and the second electrode body 322 , the first space S1 and the second A volume change is generated in the space S2. The change in volume of the first space S1 and the second space S2 may apply the driving shaft 330 to linearly move the driving shaft.

Referring to FIG. 6A , a moving end 340 is disposed at an end of the driving shaft 330 to transmit driving force generated by the driving module 300 to the driving unit 400 . The moving end 340 includes a body 341 inserted into the driving shaft 330 , a guide protrusion 342 protruding from an upper portion of the body 341 , and a connecting shaft 343 connected to the driving unit 400 . can do.

In the guide protrusion 342 , a sidewall facing the trigger member 600 or the starter 650 may be formed to be inclined. The inclined surface 342a may have a predetermined angle along the driving shaft 330 .

The connection shaft 343 is connected to a connector (not shown) of the driving unit 400 . With the linear movement of the driving shaft 330 , the connecting shaft 343 also linearly moves, and the connector may be moved to drive the driving wheel 420 .

A contact member 350 may be mounted on the outside of the driving shaft 330 . The inner space of the driving module 300 , for example, the second space S2 defined by the inner surface of the cover 310 and one side of the driving shaft 330 is a closed space, and a fluid exists therein. The contact member 350 may prevent fluid from leaking into a gap between the inner surface of the cover 310 and the driving shaft 330 .

The contact member 350 may be formed of a material having a predetermined elasticity, and may close the gap between the inner surface of the cover 310 and the driving shaft 330 . In an embodiment, the contact member 350 may be formed of a silicon-based material and/or a scrap material-based material.

The driving unit 400 is installed between the driving module 300 and the reservoir 200 , and may move the plunger disposed in the reservoir 200 with a driving force generated by the driving module 300 . However, the driving unit 400 can move the plunger 230 only when a rod (not shown) and the driving wheel 420 are coupled by the clutch unit 500 .

The rod has one end connected to the plunger, and extends in one direction. The driving wheel 420 is drivably connected to the driving module 300 , and may be rotated by the driving of the driving module 300 . The driving wheel 420 has a first connection end 421 and a second connection end 422 , and may have a space inside which the rod can move. At least one of the first connecting end 421 and the second connecting end 422 is always connected to the driving module 300 by the connector, so that the driving wheel 420 is driven by the driving of the driving module 300 . can rotate

In one embodiment, the first connecting end 421 and the second connecting end 422 may have a gear tooth shape. A connector (not shown) connected to the driving module 300 may apply gear teeth to rotate the driving wheel 420 .

The driving wheel 420 may include a hub 423 protruding from the first connection end 421 . Referring to FIG. 4 , the hub 423 may protrude to a preset height t. The hub 423 may form a space into which the second flange 621 of the trigger member 600 may be inserted.

The driving wheel 420 has a first supporter 424 that protrudes from one side and supports one end 511 of the coupler 510 . As shown in FIG. 5A , the first supporter 424 may be disposed on one surface of the driving wheel 420 to support one end 511 of the coupler 510 so as to maintain a state in which the diameter of the coupler 510 is expanded. .

In an optional embodiment, the first supporter 424 may have a protrusion 424a protruding from the end so that the one end 511 of the coupler 510 is not separated.

The clutch unit 500 may drive the driving module 300 and the driving unit 400 . The clutch unit 500 is disposed between the rod 410 and the driving wheel 420 , and may include an inserter 520 and a coupler 510 .

The inserter 520 may be disposed such that at least a part thereof is inserted into the rod 410 . The inserter 520 is disposed to cover the outside of the rod. The inserter 520 may connect the driving module 300 and the rod 410 according to the operation of the coupler 510 .

In one embodiment, the rod and the inserter 520 may have the form of a screw and a screw thread, respectively. A thread is formed on the outer circumferential surface of the rod, and a screw thread is formed on the inner circumferential surface of the inserter 520 to be connected in a screw-coupled manner. As shown in FIG. 5B or FIG. 5C , when the coupler 510 applies the outside of the inserter 520 , the rod 410 and the inserter 520 are coupled to the driving wheel 420 by the coupler 510 . At this time, the driving wheel 420 and the inserter 520 rotate together, so that the rod may move linearly in one direction.

The inserter 520 may have predetermined flexibility so as to be engaged with the driving unit 400 by the elastic force applied by the coupler 510 .

The coupler 510 is disposed on the outside of the inserter 520 , and when activated, may connect the rod 410 and the driving wheel 420 . The coupler 510 is a component that can press the outside of the inserter 520 with an elastic force, and is not limited to a specific shape. However, hereinafter, for convenience of explanation, the case of the spring type will be mainly described.

One end 511 of the coupler 510 may be detachably mounted on the driving wheel 420 . One end 511 is supported by the first supporter 424 , and may be separated beyond the protrusion 424a of the first supporter 424 by the force of the second flange 621 . The other end of the coupler 510 is fixed to the driving wheel 420 .

Accordingly, when one end 511 of the coupler 510 is mounted on the driving wheel 420 , the coupler 510 is mounted only on the driving wheel 420 , so that the rod 410 and the driving wheel 420 are driven separately. However, when one end 511 of the coupler 510 grips the inserter 520 , the coupler 510 drives the rod 410 and the driving wheel 420 .

The trigger member 600 may generate a mechanical signal into which the chemical solution of the chemical solution injection device 1 is injected. The trigger member 600 is rotatably disposed on one side of the base body 50 , and the trigger member 600 rotates to start driving the driving module 300 , and at the same time, the clutch unit 500 activates the driving unit 400 . ) to drive connection.

The trigger member 600 may rotate in one direction about the rotation shaft 51 . At this time, the trigger member 600 may apply the clutch unit 500 to couple the rod and the driving wheel 420 . In addition, the trigger member 600 may release the contact with the starter 650 , and the starter 650 may apply the driving shaft 330 to move the position of the contact member 350 . The trigger member 600 may be divided into a plurality of bent portions.

The trigger member 600 may have a first end 610 extending into the needle assembly 100 . The first end 610 is disposed to contact the first stopper 52 , and when the user rotates the needle assembly 100 , the knob 101 applies the first flange 611 to the trigger member 600 . Rotation may be initiated. After the first end 610 rotates, the cut-out groove 612 may be supported on the sidewall 52b of the first stopper 52 to limit rotation in the opposite direction of the trigger member 600 .

The trigger member 600 may have a second end 620 extending to the clutch unit 500 . The second end 620 may extend in a different direction from the first end 610 and include a second flange 621 inserted between one end 511 of the coupler 510 and the driving wheel 420 . have. When the trigger member 600 rotates, the second flange 621 applies one end 511 of the coupler 510 , and the coupler 510 is coupled with the inserter 520 to activate the clutch unit 500 . .

The trigger member 600 may include a third end 630 extending to the driving module 300 . The third stage 630 may extend toward the driving module 300 and start driving the driving module 300 .

The third end 630 may include a support piece 631 and a guide piece 632 bent toward the driving shaft 330 . As shown in FIGS. 5A and 6A , the support piece 631 may support the starter 650 before the chemical liquid injection device 1 is driven. The guide piece 632 is disposed adjacent to the support piece 631 and may support the sidewall of the moving end 340 or move along the sidewall.

The third stage 630 maintains the driving shaft of the driving module 300 in a fixed state by the starter 650 , but when the trigger member 600 rotates, the third stage 630 is in contact with the starter 650 . It is released, and the starter 650 applies the moving end 340 to start driving the driving module 300 .

The starter 650 may move the driving module 300 by rotation of the trigger member 600 . When the contact with the trigger member 600 is released, the starter 650 may apply the moving end 340 of the driving module 300 to move the driving shaft 330 .

As an embodiment, the starter 650 may be formed in the form of a spring having a preset elasticity, but is not limited thereto and may be formed in a stick form having a predetermined elasticity.

One end of the starter 650 is mounted on the base body 50 , and the other end is disposed to support the end of the trigger member 600 . The biasing end 651 of the starter 650 is disposed between the moving end 340 and the support piece 631 of the trigger member 600 .

The starter 650 may apply an end of the driving shaft 330 by rotation of the trigger member 600 . The starter 650 maintains a compressed state before the driving of the chemical injection device 1, but when the contact with the support piece 631 is released, the loading end 651 is moved by the expansion force of the starter 650 ( 340) is added. In this case, the driving shaft 330 connected to the moving end 340 and the contact member 350 installed on the driving shaft 330 may be moved according to the movement of the moving part. Thereafter, the electrochemical reaction is started in the driving module 300 , and the driving of the driving module 300 is started.

The battery 700 may supply power to the chemical injection device 1 . The driving module 300 may be connected to the battery 700 to control driving of the driving module 300 . The battery 700 may be rechargeable or may be disposable.

5A to 5C are views illustrating the driving of the driving module 300 according to the rotation of the trigger member 600 of FIG. 2 from one side, and FIGS. 6A to 6C are the rotation of the trigger member 600 of FIG. 2 . It is a view showing the driving of the driving module 300 according to the other side.

Referring to FIGS. 5A and 6A , the trigger member 600 maintains the support piece 631 and the starter 650 in a compressed state. The starter 650 is mounted on the base body 50 in a preset compression state, but the compression force is not released because the support piece 631 maintains a fixed position. The support piece 631 of the trigger member 600 maintains contact with the biasing end 651 of the starter 650 to limit the movement of the starter 650 .

The contact member 350 is positioned at the first position P1 on the inner surface of the cover 310 , and the end of the driving shaft 330 is positioned at i. The first position P1 is defined as a position where the contact member 350 and the inner surface of the cover 310 contact each other before the chemical injection device 1 is driven, and is not limited to a specific position. Since no external force is transmitted to the driving shaft 330 , the contact member 350 is positioned at the preset first position P1 .

At this time, since the clutch unit 500 is not driven, the coupler 510 is not connected to the inserter 520 . Accordingly, the rod and the driving wheel 420 of the driving unit 400 are in a drivingly separated state, and the chemical solution stored in the reservoir 200 does not flow into the needle N.

5B and 6B , the trigger member 600 rotates to release the contact between the support piece 631 and the starter 650 . When the knob 101 of the needle assembly 100 applies the first flange 611, the trigger member 600 rotates about the rotation shaft 51, and the support piece 631 is also moved at the moving end 340. rotate away from At this time, the contact between the support piece 631 and the biasing end 651 is released.

At the same time, the pressing end 651 applies the moving end 340 to move the driving shaft 330 . As the compressive force is released, the biasing end 651 comes into contact with the inclined surface 342a and moves along the inclined surface 342a. The pressing end 651 pushes the moving end 340 in the axial direction, and the moving end 340 and the driving shaft 330 move in a direction away from the driving module 300 . The end of the driving shaft 330 moves from the i position to the j position, and the contact member 350 moves together with the driving shaft 330 to be positioned at the second position P2 .

At this time, the clutch unit 500 is driven, and the coupler 510 and the inserter 520 are coupled. One end 511 of the coupler 510 is separated from the driving wheel 420 and grips the outside of the inserter 520 , so the driving wheel 420 , the coupler 510 , the inserter 520 and the rod are driven integrally

Referring to FIGS. 5C and 6C , the biasing end 651 moves beyond the inclined surface 342a. The pressing end 651 is positioned on the opposite side of the moving end 340 with reference to FIG. 5A , and contact with the moving end 340 is released. The moving end 340 may be supported on one side of the base body 50 .

In this case, an electrochemical reaction may be generated in the driving module 300 , and a driving force for linearly reciprocating the driving shaft 330 may be generated. As a result of the electrochemical reaction occurring inside the driving module 300 , the volume of the first space S1 and the second space S2 is changed. This volume change is transmitted to the driving shaft 330 as a driving force. That is, when the volume of the second space S2 increases, the driving shaft 330 moves forward, and when the volume of the second space S2 decreases, the driving shaft 330 moves backward. The movement of the driving shaft 330 linearly reciprocates the moving end 340, and the connecting shaft 343 of the moving end 340 rotates the driving wheel 420 with a connector (not shown) to store the chemical solution in the reservoir 200 . can be discharged from

After the chemical injection device 1 is manufactured, the contact member 350 contacts a specific area (first position) of the cover 310 for a long time before being driven. Since the contact member 350 includes a silicone-based or rubber-based material, it may be deformed by prolonged contact and attached to the inner surface of the cover 310 . If the contact member 350 is attached to the inner surface of the driving module 300 , it interferes with the initial driving of the driving module 300 , and it is difficult to discharge the drug from the needle N in a fixed amount and in semen.

The starter 650 may move the contact member 350 before driving the chemical injection device 1 , so that the driving module 300 may have an optimized driving environment. In detail, when the contact between the starter 650 and the trigger member 600 is released, since the starter 650 moves the driving shaft 330 of the driving module 300 , before the driving module 300 is driven by an electrochemical reaction The contact position of the contact member 350 may be changed. Since the starter 650 moves the position of the contact member 350 from the first position P1 to the second position P2 , the contact member 350 is attached and fixed to the inner surface of the driving module 300 . removed, and the initial driving of the driving module 300 may proceed smoothly.

The drug injection device 1 according to an embodiment of the present invention can be operated simply and safely by a user. When the user rotates the sleeve 110 of the needle assembly 100, the cannula C is inserted into the object in the needle assembly 100, and the clutch unit 500 connects the drive unit 400 to the drive module ( The chemical liquid may be injected by driving 300 , and the driving of the driving module 300 is started at the same time, so that the chemical liquid injection device 1 can be used simply and safely.

Since the driving module 300 is driven in an optimized driving environment in the chemical injection device 1 according to an embodiment of the present invention, it is possible to discharge the chemical in a fixed amount. The starter 650 moves the position of the driving shaft 330 before the driving module 300 is driven, so that the contact member 350 is attached to the inner surface of the driving module 300 to prevent the driving of the driving module 300 . can be prevented from becoming Since the storability of the drug injection device 1 is improved and precision is maintained, even if it is driven after being stored for a long time, the driving module 300 is smoothly driven in the initial stage, so that the drug solution can be dispensed in a fixed amount to the object.

The drug injection device 1 according to an embodiment of the present invention has a structure for discharging the drug by the clutch unit 500 after the cannula C of the needle assembly 100 is inserted into the object, driving connection Therefore, it is possible to inject a safe and quantitative drug into the subject.

The chemical injection device 1 according to an embodiment of the present invention is intuitively started by rotation of the needle assembly 100, and the rotation direction of the needle assembly 100 and the trigger member 600 is limited to one direction. and, since the rotation distance is limited to a preset distance, user safety can be secured.

7 is a flowchart illustrating a method of driving a chemical injection device according to another embodiment of the present invention, and FIG. 8 is a flowchart illustrating some steps of FIG. 7 .

7 and 8 , the driving method of the chemical injection device 1 includes the steps of mounting the chemical injection device to the object (S10), rotating the needle assembly 100 (S20), and the needle assembly is a trigger member It may include a step of rotating the trigger member by applying (S30), and a step of delivering the chemical from the reservoir to the needle assembly (S40).

In the step of mounting the chemical injection device to the object ( S10 ), the attachment part 6 of the chemical injection device 1 is attached to the object. In addition, it can be connected to the remote device 2 in a wired or wireless communication environment.

In the step (S20) of rotating the needle assembly 100, the needle assembly 100 is driven by the user. As described above, when the sleeve 110 of the needle assembly 100 is rotated first by the user, the cannula (C) and the needle (N) are inserted into the skin together (see FIG. 4b ), the sleeve 110 When the second rotation is performed, only the needle N is withdrawn from the skin (see Fig. 4c). The first rotation of the sleeve 110 is to fix the cannula (C) to the skin using the needle (N), and the second rotation is to withdraw the needle (N) and inject the chemical solution.

The step (S30) of the needle assembly pressing the trigger member to rotate the trigger member occurs simultaneously with the rotation of the needle assembly 100. When the needle assembly 100 rotates, the knob 101 applies the first flange 611 of the trigger member 600 .

At this time, the step (S31) of coupling the rod and the rotary wheel by driving the clutch mechanism and the step (S32) of linearly moving the end of the drive shaft by the starter pressing the end of the drive shaft occur substantially simultaneously.

In the step of coupling the rod and the rotary wheel by driving the clutch unit (S31), the second flange 621 of the trigger member 600 applies one end 511 of the coupler 510, and the clutch unit 500 This is activated. The coupler 510 connects the rod and the driving wheel 420 , so that the driving force generated by the driving module 300 may be transmitted to the plunger 230 through the driving unit 400 .

In the step (S31) of the starter applying the end of the drive shaft to linearly move the end of the drive shaft, the contact between the starter 650 and the third end 630 is released, and the starter 650 drives the drive module 300. can start. As for the driving shaft 330 , the driving shaft 330 moves while the starter 650 applies and passes through the moving end 340 . At this time, the contact member 350 disposed inside the driving module 300 moves from the first position P1 to the second position P2 to be movable on the inner surface of the driving module 300 .

In the step (S40) of transferring the chemical from the reservoir to the needle assembly, an electrochemical reaction is generated in the driving module 300, and the chemical solution of the reservoir 200 can be delivered to the object by repetitive linear movement of the driving shaft 330. have.

The driving method of the chemical injection device according to an embodiment of the present invention can be driven simply and safely by a user. When the user rotates the sleeve 110 of the needle assembly 100, the cannula C is inserted into the object in the needle assembly 100, and the clutch unit 500 connects the drive unit 400 to the drive module ( The chemical liquid may be injected by driving 300 , and the driving of the driving module 300 is started at the same time, so that the chemical liquid injection device 1 can be used simply and safely.

In the driving method of the chemical injection device according to an embodiment of the present invention, the driving module 300 is driven in an optimized driving environment, so that the chemical solution can be dispensed in a fixed amount. The starter 650 moves the position of the driving shaft 330 before the driving module 300 is driven, so that the contact member 350 is attached to the inner surface of the driving module 300 to prevent the driving of the driving module 300 . can be prevented from becoming Since the storability of the chemical injection device 1 is improved and precision is maintained, even if it is driven after being stored for a long time, the driving module 300 may be smoothly driven in the initial stage to discharge the chemical solution to the object in a fixed amount.

In the driving method of the drug injection device according to an embodiment of the present invention, after the cannula (C) of the needle assembly 100 is inserted into the object, the structure for discharging the drug by the clutch unit 500 is drive connection Therefore, it is possible to inject a safe and quantitative drug into the subject.

In the driving method of the drug injection device according to an embodiment of the present invention, the driving is intuitively started by the rotation of the needle assembly 100, and the rotation direction of the needle assembly 100 and the trigger member 600 is limited to one direction. and, since the rotation distance is limited to a preset distance, user safety can be secured.

In the driving method of the drug injection device according to an embodiment of the present invention, the driving is intuitively started by the rotation of the needle assembly 100, and the rotation direction of the needle assembly 100 and the trigger member 600 is limited to one direction. and, since the rotation distance is limited to a preset distance, user safety can be secured.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and not only the claims to be described later, but also all ranges equivalent to or changed from the claims are of the spirit of the present invention. would be said to belong to the category.

1: drug injection device
10: Reservoir
50: base body
100: needle assembly
200: reserve
300: drive module
400: drive unit
410: load
420: drive wheel
500: clutch unit
510: coupler
520: inserter
600: no trigger
650: starter
700: battery

Claims (6)

base body;
a needle assembly mounted on the base body;
a reservoir mounted on the base body and having a plunger disposed in the inner space;
a driving module having a linearly moving driving shaft and generating a driving force for moving the plunger; and
A chemical injection device comprising; a trigger member that is rotatably disposed on one side of the base body, the contact is released from the end of the drive shaft by rotation, moves the drive shaft, and starts driving the drive module. According to claim 1,
The needle assembly rotates the trigger member by applying one end of the trigger member to rotation in one direction,
The trigger member is a chemical liquid injection device, the other end is separated from the end of the drive shaft by rotation. According to claim 1,
A starter mounted on the base body and arranged to support the end of the trigger member, the starter for urging the moving end mounted on the end of the drive shaft by rotation of the trigger member; further comprising, a chemical injection device. 4. The method of claim 3,
The driving module includes a contact member mounted on the driving shaft and contacting the inner surface of the driving module;
The starter applies the moving end to linearly move the driving shaft and the contact member. 5. The method of claim 4,
The contact member is moved from the inner surface before the driving module is driven, the drug injection device. According to claim 1,
the base body
and a stopper for limiting a rotation distance of the trigger member.

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