KR102351142B1 - Apparatus for Infusing medical liquid - Google Patents

Abstract

The present invention provides a drug injection device, comprising: a base body; a needle assembly mounted on the base body; a reservoir mounted on the base body and fluidly connected to the needle assembly; a driving unit having a rod connected to the disposed plunger and moving along the reservoir, a driving wheel transmitting driving force to the rod, a clutch unit arranged between the rod and the driving wheel, and the base body It is rotatably disposed on one side and includes a trigger member for coupling the rod and the driving wheel by applying the clutch unit.

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 drug delivery device capable of safely operating and accurately delivering a drug.

One aspect of the present invention includes a base body, a needle assembly mounted on the base body, a reservoir mounted on the base body and fluidly connected to the needle assembly, and a plunger disposed inside the reservoir. A driving unit having a rod connected to move along the reservoir, a driving wheel transmitting driving force to the rod, a clutch unit disposed between the rod and the driving wheel, and rotatable to one side of the base body and a trigger member for coupling the rod and the driving wheel by applying the clutch unit.

In addition, the needle assembly rotates the trigger member by applying one end of the trigger member to rotation in one direction, and the other end of the trigger member is rotated to apply the coupler of the clutch unit, so that one end of the coupler is driven It can be detached from the wheel.

In addition, the trigger member may apply the clutch unit after the cannula of the needle assembly is inserted.

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

In addition, the clutch unit may include an inserter inserted into the rod, and a coupler disposed outside the inserter, one end of which is detachably mounted from the driving wheel.

In addition, the driving wheel may include a first supporter disposed on one surface to support one end of the coupler so as to maintain a state in which the diameter of the coupler is expanded.

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 to complete the preparation for injection of the drug, and the clutch unit connects the drive unit and the drive module to transfer the drug from the reservoir to the needle. may be injected, and at the same time driving of the driving module is started. Therefore, the user can safely start driving the drug injection device by simply rotating the needle assembly.

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 .
FIG. 4 is an enlarged view of area A of FIG. 3 .
5A to 5C are cross-sectional views illustrating the operation of the needle assembly of FIG. 2 .
6 is a perspective view showing a partial configuration of FIG. 3 .
7 is a perspective view illustrating that the trigger member of FIG. 6 is rotated to drive the clutch unit.
8 is a cross-sectional view illustrating a coupling relationship between the reservoir and the clutch unit of FIG. 6 .
9 is a cross-sectional view illustrating a coupling relationship between the reservoir and the clutch unit of FIG. 7 .
Fig. 10 is a diagram showing an arrangement relationship between the drive wheel and the clutch unit of Fig. 6;
Fig. 11 is a diagram showing an arrangement relationship between the drive wheel and the clutch unit of Fig. 7;
12 is a flowchart illustrating a method of driving a chemical injection device according to another embodiment of the present invention.
13 is a flowchart illustrating some steps of FIG. 12 .

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 showing the internal arrangement of an embodiment of the chemical injection device 1 of FIG. 1 , FIG. 3 is a plan view illustrating the chemical injection device 1 of FIG. 2 , and FIG. 4 is a region A of FIG. It is a drawing showing an enlarged view.

1 to 4 , an embodiment of the chemical 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 .

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 (refer to FIG. 6 ). 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 may rotate the trigger member 600 smoothly.

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 .

5A to 5C are cross-sectional views illustrating the operation of the needle assembly 100 according to an embodiment.

5A to 5C , 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. 5A and 5B, but is separated from the first holder 130 when the elastic member 120 contracts again as shown in FIG. 5C 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. 5C , 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 5a, 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. 5B , 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. 5C , 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 as shown in FIG. 5c and only the cannula C is inserted into the subject, 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 space in which the chemical solution is stored by the barrel 210 and the cap cover 220 (refer to FIG. 8 ). Inside the reservoir 200, the plunger 230 may move linearly to discharge the chemical to the needle (N).

The plunger 230 is provided with a sealing portion 240 in a portion in contact with the inner wall of the barrel 210, it is possible to prevent leakage of the chemical when the plunger 230 is moved.

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.

When the driving units 400 are engaged with each other by the clutch unit 500 , the driving module 300 rotates the driving wheel 420 of the driving unit 400 , and is loaded with the rotation of the driving wheel 420 . 410 may move linearly, so that the plunger 230 may move.

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.

6 is a perspective view illustrating a partial configuration of FIG. 3 , and FIG. 7 is a perspective view illustrating that the trigger member 600 of FIG. 6 is rotated to drive the clutch unit 500 . 8 is a cross-sectional view illustrating the coupling relationship between the reservoir 200 and the clutch unit 500 of FIG. 6 , and FIG. 9 is a cross-sectional view illustrating the coupling relationship between the reservoir 200 and the clutch unit 500 of FIG. 7 . to be.

6 to 9 , the driving unit 400 is installed between the driving module 300 and the reservoir 200 , and a plunger disposed in the reservoir 200 with driving force generated by the driving module 300 . (230) can be moved. However, the driving unit 400 can move the plunger 230 only when the rod 410 and the driving wheel 420 are coupled or connected by the clutch unit 500 .

The rod 410 is connected to the plunger 230 and extends in one direction. The rod 410 is inserted into the opening 225 of the cap cover 220 , and the rod 410 may move in the longitudinal direction of the reservoir 200 to move the plunger 230 .

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 410 can move. At least one of the first connecting end 421 and the second connecting end 422 is always drivably connected to the driving module 300 , so that the driving wheel 420 can be rotated by the driving of the driving module 300 . .

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. 6 , 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 the expanded diameter of the coupler 510 .

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.

When the coupler 510 is separated from the first supporter 424 , the coupler 510 grips the inserter 520 while reducing the diameter. Since the coupler 510 is contracted to a set radius, it is possible to provide a preset grip force to the inserter 520 .

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 410 . 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 410 and the inserter 520 may have the form of a screw and a screw thread, respectively. A screw thread is formed on the outer circumferential surface of the rod 410 , and a screw thread is formed on the inner circumferential surface of the inserter 520 to be connected in a screw-coupled manner. 7 , 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 410 may linearly move in one direction.

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 description, 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 512 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 .

FIG. 10 is a view showing an arrangement relationship between the drive wheel 420 and the clutch unit 500 of FIG. 6 , and FIG. 11 is a view showing the arrangement relationship between the drive wheel 420 and the clutch unit 500 of FIG. 7 . to be.

8 and 10 , when the clutch unit 500 is not activated, when the chemical solution is injected into the reservoir 200 for storage of the chemical solution, the rod 410 and the inserter 520 move the driving wheel 420 ) can move through the internal space of Since a gap of g is formed between the inserter 520 and the coupler 510, if the coupler 510 does not grip the inserter 520, the rod 410 and the inserter 520 can move. have.

8 and 11 , when the clutch unit 500 is activated, when the driving wheel 420 rotates, the inserter 520 also rotates. At this time, since the rod 410 is coupled to the inserter 520 , the rod 410 may linearly move forward by the rotation of the inserter 520 .

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 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 a driving shaft to move the position of the contact member located inside the driving module 300 . The trigger member 600 may be divided into a plurality of bent parts.

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 starter 650 maintains the driving shaft of the driving module 300 in a fixed state by the third stage 630 , 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 driving shaft 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 a moving end of the driving module 300 to move the driving shaft.

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 . One end of the starter 650 is disposed between the end of the drive shaft and the third end 630 of the trigger member 600 .

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.

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 is inserted into the object in the needle assembly 100 , and the clutch unit 500 connects the drive unit 400 to the drive module 300 . The chemical solution can be injected by driving, and the driving of the driving module 300 is started at the same time, so that the chemical solution injection device 1 can be used simply and safely.

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.

12 is a flowchart illustrating a method of driving a chemical injection device according to another embodiment of the present invention, and FIG. 13 is a flowchart illustrating some steps of FIG. 12 .

12 to 13 , 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), 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. 5b ), the sleeve 110 When the second rotation is performed, only the needle N is withdrawn from the skin (see Fig. 5c). 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. 9 , the coupler 510 connects the rod 410 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 driving shaft to linearly moving the end of the driving shaft, the starter 650 is driven by the driving module 300 while the contact between the starter 650 and the third stage 630 is released. can start. The drive shaft moves the end linearly along the axis as the starter 650 biases and passes through the end. Thereafter, the driving module 300 may repeatedly linearly move the driving shaft, so that the driving force may be transmitted to the driving unit 400 .

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

The driving method of the drug 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 is inserted into the object in the needle assembly 100 , and the clutch unit 500 connects the drive unit 400 to the drive module 300 . The chemical solution can be injected by driving, and the driving of the driving module 300 is started at the same time, so that the chemical solution injection device 1 can be used simply and safely.

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.

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 fluidly connected to the needle assembly;
a driving unit having a rod connected to a plunger disposed inside the reservoir and moving along the reservoir, and a driving wheel configured to transmit a driving force to the rod;
a clutch unit having a coupler disposed between the rod and the driving wheel; and
and a trigger member rotatably disposed on one side of the base body to apply the clutch unit to couple the rod and the driving wheel,
The trigger member is rotated and the end of the coupler is applied to the coupler, so that one end of the coupler is separated from the driving wheel. According to claim 1,
The needle assembly rotates in one direction by pressing one end of the trigger member to rotate the trigger member. According to claim 1,
The trigger member
After the cannula of the needle assembly is inserted, the medicament injection device applies the clutch unit. According to claim 1,
the base body
and a stopper for limiting a rotation distance of the trigger member. According to claim 1,
the clutch unit
An inserter inserted into the rod; further comprising,
The coupler is disposed on the outside of the inserter, one end is mounted to be detachably from the driving wheel, the drug injection device. 6. The method of claim 5,
the drive wheel
A first supporter disposed on one surface to support one end of the coupler so as to maintain a state in which the diameter of the coupler is expanded.

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