KR20230159339A - Apparatus for Infusing medical liquid - Google Patents

Abstract

The present invention provides a chemical 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, and an interior of the reservoir. A drive unit including a rod connected to a disposed plunger and moving along the reservoir, a drive wheel that transmits driving force to the rod, a clutch unit disposed between the rod and the drive wheel, and the base body. It is rotatably disposed on one side and includes a trigger member that couples the rod and the driving wheel by applying force to the clutch unit.

Description

Medical liquid injection device {Apparatus for Infusing medical liquid}

The present invention relates to a chemical injection device.

Generally, a drug injection device such as an insulin injection device is used to inject a drug solution into the patient's body. These chemical injection devices are sometimes used by professional medical staff such as doctors and nurses, but in most cases, they are used by the general public, such as patients themselves or their guardians.

Diabetic patients, especially pediatric diabetic patients, need to inject medicinal solutions such as insulin into the body at set intervals. A patch-type drug injection device that is attached to the human body for a certain period of time is being developed, and this drug injection device can be used while attached to the patient's body, such as the abdomen or waist, in the form of a patch for a certain period of time.

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. It is important to precisely inject a small amount of drug solution through a small drug injection device.

When attached to the human body, a chemical injection device needs to be comfortable to wear, convenient to use, durable, and run at low power. In particular, since the drug injection device is used by attaching it directly to the patient's skin, it is important for the user to conveniently and safely operate the drug injection device.

The present invention provides a drug delivery device that operates safely and can accurately deliver drugs.

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 drive unit including a rod that is connected and moves along the reservoir and a drive wheel that transmits driving force to the rod, a clutch unit disposed between the rod and the drive wheel, and a rotatable side of the base body. It provides a chemical injection device including a trigger member that is disposed to couple the rod and the drive wheel by applying pressure to the clutch unit.

In addition, the needle assembly rotates in one direction by pushing one end of the trigger member to rotate the trigger member, and the other end of the trigger member rotates and forces the coupler of the clutch unit, so that one end of the coupler drives the It can be separated from the wheel.

Additionally, the trigger member may force the clutch unit after the cannula of the needle assembly is inserted.

Additionally, the base body may be provided with a stopper that limits the rotation distance of the trigger member.

Additionally, the clutch unit may include an inserter inserted into the rod, and a coupler disposed outside the inserter, one end of which is mounted to be detachable from the driving wheel.

In addition, the driving wheel includes a first supporter disposed on one side and supporting one end of the coupler to maintain the expanded diameter of the coupler, and disposed on the one side to be spaced apart from the first supporter, so that the diameter of the coupler is expanded. A second supporter may be provided to support one end of the coupler to maintain this contracted state.

The chemical injection device and its operating method according to the present invention can be operated simply and safely by the user. When the user rotates the sleeve of the needle assembly, the cannula is inserted into the object and preparations for injection of the drug solution are completed. At the same time, the clutch unit connects the drive unit and the drive module to allow the drug solution to flow from the reservoir to the needle. It can be injected, and at the same time, the driving module is started. Therefore, the user can safely start operating the chemical injection device by simply rotating the needle assembly.

In the drug injection device and its driving method according to the present invention, after the cannula of the needle assembly is inserted into the subject, the structure for discharging the drug is driven and connected by a clutch unit, so that a safe and fixed amount of drug can be injected into the subject. You can.

In the chemical injection device and its driving method according to the present invention, the operation is intuitively initiated by rotation of the needle assembly, the rotation direction of the needle assembly and the trigger member is 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 this effect.

Figure 1 is a perspective view showing a chemical injection device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the internal arrangement of the chemical injection device of FIG. 1.
FIG. 3 is a plan view showing the chemical injection device of FIG. 2.
Figure 4 is an enlarged view of area A of Figure 3.
FIGS. 5A to 5C are cross-sectional views showing the operation of the needle assembly of FIG. 2.
FIG. 6 is a perspective view showing a partial configuration of FIG. 3.
FIG. 7 is a perspective view showing that the clutch unit is driven by rotating the trigger member of FIG. 6.
FIG. 8 is a cross-sectional view showing the coupling relationship between the reservoir and the clutch unit of FIG. 6.
FIG. 9 is a cross-sectional view showing the coupling relationship between the reservoir and the clutch unit of FIG. 7.
FIG. 10 is a diagram showing the arrangement relationship between the drive wheel and the clutch unit in FIG. 6.
FIG. 11 is a diagram showing the arrangement relationship between the drive wheel and the clutch unit in FIG. 7.
Figure 12 is a flowchart showing a method of driving a chemical injection device according to another embodiment of the present invention.
FIG. 13 is a flowchart showing some steps in FIG. 12.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along 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. When describing with reference to the drawings, identical or corresponding components will be assigned the same reference numerals and redundant description thereof will be omitted. .

In the following examples, singular terms include plural terms unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that the features or components described in the specification exist, and do not exclude in advance the possibility of adding one or more other features or components.

In cases where an embodiment can be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially at the same time, or may be performed in an order opposite to that in which they are described.

In the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the following embodiments are not necessarily limited to what is shown.

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

Referring to FIG. 1, the drug injection device 1 is attached to a drug injection target and can inject the drug stored inside in a fixed amount set by the user. In an optional embodiment, the drug injection device 1 may be mounted on the user's body. Additionally, in another optional embodiment, the drug injection device 1 can be mounted on an animal to inject the drug.

The chemical injection device 1 can be used for various purposes depending on the type of chemical solution to be injected. For example, the drug solution may include an insulin-based drug solution for diabetic patients, a drug solution for the pancreas, a drug solution for the heart, and other various types of drug solutions.

The chemical injection device 1 may be connected to a remote device 2 that is wired or wirelessly connected. The user can use the chemical injection device (1) by operating the remote device (2) and monitor the usage status of the chemical injection device (1). For example, the amount of drug injected from the drug injection device 1, the number of injections of the drug, the amount of 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 operated.

In one embodiment, the remote device 2 refers to a communication terminal that can use an application in a wired or wireless communication environment. Here, the remote device 2 may be a user's portable terminal. To explain this in more detail, remote device 2 may be a computer (e.g., desktop, laptop, tablet, etc.), a media computing platform (e.g., cable, satellite set-top box, digital video recorder), or a handheld computing device (e.g., For example, a PDA, an email client, etc.), any type of cell phone, any type of wearable device that can be used by attaching or mounting it to the user's body, or any other type of computing or communication platform. However, the present invention is not limited to this.

The chemical injection device 1 and the remote device 2 can communicate through a communication network. At this time, the communication network refers to a communication network that provides a connection path so that the remote device 2 can transmit and receive data after connecting to a service server (not shown). Communication networks include, 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 communications. may encompass, but the scope of the present invention is not limited thereto.

According to FIG. 1, the remote device 2 is shown 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 chemical 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 showing the chemical injection device 1 of FIG. 2, and FIG. 4 is area A of FIG. 3. This is an enlarged drawing.

Referring to FIGS. 1 to 4 , one embodiment of the chemical injection device 1 may include a housing 5 covering the outside and an attachment portion 6 located adjacent to the user's skin. The chemical injection device 1 includes a plurality of parts arranged in the internal space between the housing 5 and the attachment portion 6. A separate joining means may be further interposed between the attachment portion 6 and the user's skin, and the chemical injection device 1 may be fixed to the skin by the joining means.

The chemical injection device 1 includes a base body 50, a needle assembly 100, a reservoir 200, a drive module 300, a drive unit 400, a clutch unit 500, a trigger member 600, and a battery. It may include (700).

The base body 50 forms the basic frame of the housing 5 and is mounted in the internal space of the housing 5. The base body 50 may be provided in plural pieces. In one embodiment, the first body 50a covers the upper side of the internal components, and the second body 50b covers the lower side of the internal components. The first body 50a and the second body 50b can be assembled to fix the internal parts of the chemical injection device 1 at a preset position. In another embodiment, the base body may be formed as an integrated 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 can rotate based on the rotation axis 51 protruding from the base body 50.

The base body 50 may be provided with a stopper that limits the rotation distance of the trigger member 600. A plurality of stoppers may be provided, and the movement distance of the trigger member 600 may be limited so that the trigger member 600 rotates to a preset point. According to one 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 is configured to prevent the first end 610 from rotating 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 the surface in contact with the trigger member 600 protrudes at an angle (see 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 can smoothly rotate the trigger member 600 as it rotates.

The first stopper 52 may have a side wall 52b that limits the rotation direction of the trigger member 600. The side wall 52b extends from the upper surface 52a and may 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 in one direction to a preset rotation distance, thereby forming the chemical solution 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 is disposed so that its upper part protrudes from the base body 50 to limit the moving distance of the second end 620 of the trigger member 600. In one embodiment, the longitudinal extension of the second stopper 53 may pass through the center of the rotation axis 51.

Figures 5A to 5C are cross-sectional views showing the operation of the needle assembly 100 according to one embodiment.

5A to 5C, the needle assembly 100 may be mounted on the base body 50. As the needle assembly 100 rotates, the needle (N) and/or the cannula (C) may 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). there is.

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

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

A movable 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 peripheral surface of the first holder 130. When the sleeve 110 rotates, the moving protrusion 115 moves along the side walls of the guide groove 131, so that the first holder 130 can 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 can be moved downward. Additionally, 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 on one side of the first holder 130, when the first holder 130 moves in the axial direction, the needle N also moves together. The first holder 130 is disposed in the inner space of the sleeve 110, and an elastic member 120 is disposed at the top.

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 restriction groove 131e. The first stop groove 131a is a groove where the movable protrusion 115 is initially located, and the elastic member 120 maintains its contracted state here. The lifting 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 lifting 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 through which the moving protrusion 115 returns to its initial position, and at this time, the elastic member 120 maintains its contracted state again.

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

The second holder 140 maintains contact with the first holder 130 in the position shown in FIGS. 5A and 5B, but when the elastic member 120 contracts again as shown in FIG. 5C, it is separated from the first holder 130 and moves to the base. It is fixed to the body (50).

A cannula (C) is inserted into the center of the central body 141, and the needle (N) can 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 protrudes outward from the central body 141 and may be formed to be flexible. There may be a plurality of locking protrusions 142. Referring to FIG. 5C, the locking protrusion 142 is fixed to the ledge portion 55 when the second holder 140 is lowered, so that it can be fixed to the base body 50 even when the first holder 130 is raised again. there is.

The sensor 143 may be placed on one side of the locking protrusion 142. However, it is not limited to this and may be disposed on the outer surface of the central body 141. The sensor 143 can detect whether the cannula (C) is accurately inserted into the user's skin. The sensor 143 may sense the contact between the second holder 140 and the base 40.

In detail, since the second holder 140 moves beyond the ledge portion 55 when moving in the downward direction, the sensor 143 can measure whether it is in contact with the contact portion 45 disposed on the upper part of the base 40. . The sensor 143 is made of a conductive material and generates an electrical signal when it comes into contact with the contact portion 45, so that the control unit (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 uninserted from the cannula (C) by moving the first holder (130) in the axial direction. One end of the needle (N) is connected to the reservoir 200 so that the medicinal solution can be delivered, and the other end is inserted into the cannula (C) and can 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 moving the second holder 140 in the axial direction. Since the cannula (C) has a conduit shape that can accommodate the needle (N), the medical solution discharged from the needle (N) can be injected into the user.

The patch (P) is supported on the base 40 and can fix the position of the cannula (C). Since the end of the cannula (C) is supported by the patch (P), the cannula (C) can be prevented from being separated during storage or movement.

As shown in Figure 5a, the needle (N) and the cannula (C) are initially placed inside the needle assembly 100. When the user first rotates the sleeve 110, the moving protrusion 115 moves in the i direction and exceeds the first stop groove 131a.

As shown in FIG. 5B, the first holder 130 descends due to 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 lifting groove 131b relative to the first holder 130 due to the lowering of the first holder 130. The first holder 130 and the second holder 140 descend together, and the needle (N) and 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 portion 55, but the first holder 130 rises according to the rotation of the sleeve 110, and the elastic member 120 moves the first holder 130 upward. is re-contracted 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, the cannula (C) and the needle (N) are fluidly connected, so the medical solution injected from the reservoir 200 can be injected into the user through the needle (N) and the cannula (C).

In the medicine injection device 1, the user can simply rotate the needle assembly 100, insert the cannula C into the object, and start injection of the medicine. The drug injection device 1 may be driven by the user first rotating the sleeve 110 so that the cannula C is inserted into the object and the knob 101 applying pressure to the trigger member 600 . More preferably, as shown in FIG. 5C, in a state where the needle N is withdrawn from the object and only the cannula C is inserted into the object, the knob 101 pushes the trigger member 600 to deliver the chemical solution. The driving module 300 is driven, and the chemical liquid can be discharged quantitatively from the reservoir 200. Therefore, the user can conveniently and stably use the chemical injection device 1.

Referring again to FIGS. 2 and 3, the reservoir 200 is mounted on the base body 50 and connected to the needle assembly 100. The reservoir 200 may have a space in which the chemical liquid is stored by the barrel 210 and the cap cover 220 (see FIG. 8). Inside the reservoir 200, the plunger 230 moves linearly to discharge the chemical solution into the needle (N).

The plunger 230 is provided with a sealing portion 240 at a portion that contacts the inner wall of the barrel 210, thereby preventing leakage of the chemical solution when the plunger 230 moves.

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

When the drive units 400 are engaged with each other by the clutch unit 500, the drive module 300 rotates the drive wheel 420 of the drive unit 400 and loads by rotating the drive wheel 420. As 410 moves linearly, the plunger 230 can move.

The driving module 300 can be any type of device that has chemical suction power and chemical discharge power by electricity. For example, all types of pumps, such as mechanical displacement micropumps and electromagnetic motion micropumps, can be used. A mechanical displacement micropump is a pump that uses the movement of a solid or fluid, such as a gear or diagram, to create a pressure difference to induce the flow of fluid, and is called a diaphragm displacement pump or fluid displacement pump. ), rotary pump, etc. Electromagnetic micropumps are pumps that use energy in the form of electricity or magnetism directly to move fluid, and include electrohydrodynamic pumps (EHD), electroosmotic pumps, and magnetohydrodynamic pumps ( Magneto hydrodynamic pump, electro wetting pump, etc.

FIG. 6 is a perspective view showing a partial configuration of FIG. 3 , and FIG. 7 is a perspective view showing the clutch unit 500 being driven by rotating the trigger member 600 of FIG. 6 . FIG. 8 is a cross-sectional view showing the coupling relationship between the reservoir 200 and the clutch unit 500 of FIG. 6, and FIG. 9 is a cross-sectional view showing the coupling relationship between the reservoir 200 and the clutch unit 500 of FIG. 7. am.

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

Rod 410 is connected to 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 can move in the longitudinal direction of the reservoir 200 to move the plunger 230.

The driving wheel 420 is dynamically connected to the driving module 300 and can rotate by driving 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 where the rod 410 can move. Since at least one of the first connection end 421 and the second connection end 422 is always connected to the driving module 300, the driving wheel 420 can rotate by driving the driving module 300. .

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

The driving wheel 420 may have 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 can be inserted.

The driving wheel 420 protrudes from one side and has a first supporter 424 supporting 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 and support one end 511 of the coupler 510 to maintain the expanded diameter of the coupler 510 .

In an optional embodiment, the first supporter 424 may have a protruding protrusion 424a at an end to prevent the one end 511 of the coupler 510 from being separated.

When the coupler 510 is separated from the first supporter 424, the coupler 510 reduces its diameter and grips the inserter 520. Since the coupler 510 is contracted to a set radius, it can provide a preset grip force to the inserter 520.

The clutch unit 500 may dynamically connect the drive module 300 and the drive 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 arranged so that at least a portion of the inserter 520 is inserted into the rod 410 . The inserter 520 is arranged to cover the outside of the rod 410. The inserter 520 may connect the drive module 300 and the load 410 according to the operation of the coupler 510.

In one embodiment, the rod 410 and the inserter 520 may have the shape of a screw and a screw thread, respectively. A screw thread is formed on the outer peripheral surface of the rod 410, and a screw thread is formed on the inner peripheral surface of the inserter 520, so that they can be connected in a screw-coupled form. As shown in FIG. 7 , when the coupler 510 forces the outside of the inserter 520, the rod 410 and the inserter 520 are coupled to the drive wheel 420 by the coupler 510. At this time, the driving wheel 420 and the inserter 520 rotate together, so that the rod 410 can move linearly in one direction.

The coupler 510 is disposed on the outside of the inserter 520 and, when activated, can connect the rod 410 and the drive wheel 420. The coupler 510 is a component that can apply elastic force to the outside of the inserter 520, and is not limited to a specific shape. However, for convenience of explanation, the following description will focus on the case of the spring type.

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, but can 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.

Therefore, 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 the rod 410 and the driving wheel 420 are drivenly separated. However, when one end 511 of the coupler 510 grips the inserter 520, the coupler 510 dynamically connects the rod 410 and the drive wheel 420.

FIG. 10 is a diagram showing the arrangement relationship between the drive wheel 420 and the clutch unit 500 in FIG. 6, and FIG. 11 is a diagram showing the arrangement relationship between the drive wheel 420 and the clutch unit 500 in FIG. 7. am.

Referring to FIGS. 8 and 10 , if the clutch unit 500 is not activated, the rod 410 and the inserter 520 are connected to the drive wheel 420 when the chemical solution is injected into the reservoir 200 for storage of the chemical solution. ) can move around the internal space. 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 cannot move. there is.

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

The inserter 520 may have a certain level of flexibility to be engaged with the drive unit 400 by the elastic force applied by the coupler 510.

The trigger member 600 may generate a mechanical signal that causes the chemical solution of the chemical solution injection device 1 to be 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 drive module 300, and at the same time, the clutch unit 500 operates the drive unit 400. ) drive and connect.

The trigger member 600 can rotate in one direction about the rotation axis 51. At this time, the trigger member 600 may apply force to the clutch unit 500 to couple the rod and the driving wheel 420. Additionally, the trigger member 600 may release contact with the starter 650 so that the starter 650 can apply the drive shaft to move the position of the contact member located inside the drive module 300. The trigger member 600 may be divided into a plurality of bent parts.

Trigger member 600 may have a first end 610 extending into 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 forces the first flange 611 to press the trigger member 600. A meeting may begin. After the first end 610 rotates, the cutting groove 612 is supported on the side wall 52b of the first stopper 52, thereby limiting rotation in the opposite direction of the trigger member 600.

Trigger member 600 may have a second end 620 extending into clutch unit 500 . The second end 620 extends in a different direction from the first end 610 and may be provided with a second flange 621 inserted between one end 511 of the coupler 510 and the driving wheel 420. there is. When the trigger member 600 rotates, the second flange 621 forces one end 511 of the coupler 510, so that the coupler 510 is coupled to the inserter 520 and the clutch unit 500 is activated. .

The trigger member 600 may have a third end 630 extending to the drive module 300 . The third end 630 extends toward the driving module 300 and can initiate driving of the driving module 300.

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

The starter 650 may move the driving module 300 by rotating the trigger member 600. When the starter 650 is released from contact with the trigger member 600, it can move the drive shaft by applying the moving end of the drive module 300.

In one embodiment, the starter 650 may be formed in the form of a spring having a preset elastic force, but the present invention is not limited thereto and may be formed in the form of a stick 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 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 is connected to the battery 700 to control the driving of the driving module 300. The battery 700 may be rechargeable or disposable.

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

The chemical injection device 1 according to an embodiment of the present invention has a drive connection structure for discharging the chemical liquid by the clutch unit 500 after the cannula C of the needle assembly 100 is inserted into the object. Therefore, a safe and fixed amount of drug can be injected into the subject.

The chemical injection device 1 according to an embodiment of the present invention is intuitively started by rotating 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.

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

Referring to Figures 12 and 13, the method of driving the drug injection device 1 includes the steps of mounting the drug injection device on an object (S10), rotating the needle assembly 100 (S20), and rotating the needle assembly 100 using a trigger member. A step of rotating the trigger member by applying force (S30), and a step of transferring the chemical solution from the reservoir to the needle assembly (S40).

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

In the step of rotating the needle assembly 100 (S20), the needle assembly 100 is driven by the user. As described above, when the sleeve 110 of the needle assembly 100 is first rotated by the user, the cannula (C) and the needle (N) are inserted into the skin together (see FIG. 5B), and the sleeve 110 When rotated a second time, only the needle (N) is pulled out from the skin (see Figure 5c). The first rotation of the sleeve 110 is to secure the cannula (C) to the skin using the needle (N), and the second rotation is to withdraw the needle (N) and inject the medical solution.

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

At this time, a step (S31) in which the rod and the rotating wheel are coupled by driving the clutch mechanism and a step (S32) in which the end of the drive shaft is linearly moved by the starter applying force to the end of the drive shaft occur substantially simultaneously.

In the step (S31) in which the rod and the rotating wheel are coupled by driving the clutch unit, the second flange 621 of the trigger member 600 forces one end 511 of the coupler 510, and the clutch unit 500 This is activated. As shown in FIG. 9, the coupler 510 connects the rod 410 and the driving wheel 420, so that the driving force generated in the driving module 300 can be transmitted to the plunger 230 through the driving unit 400. .

In the step (S31) in which the starter applies the end of the drive shaft to linearly move the end of the drive shaft, the contact between the starter 650 and the third stage 630 is released, and the starter 650 operates the drive module 300. can be started. As the starter 650 forces and passes through the end of the drive shaft, the end moves linearly along the axis. Thereafter, the driving module 300 linearly moves the driving shaft repeatedly, so that driving force can be transmitted to the driving unit 400.

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

The method of operating the chemical injection device according to an embodiment of the present invention allows the user to operate it simply and safely. When the user rotates the sleeve 110 of the needle assembly 100, the cannula is inserted into the object, and the clutch unit 500 connects the drive unit 400 to control the drive module 300. The chemical solution can be injected by driving, and the driving module 300 is started at the same time, so the chemical solution injection device 1 can be used simply and safely.

The driving method of the chemical injection device according to an embodiment of the present invention includes a drive connection structure for discharging the chemical liquid by the clutch unit 500 after the cannula C of the needle assembly 100 is inserted into the object. Therefore, a safe and fixed amount of drug can be injected into the subject.

In the method of driving the chemical injection device according to an embodiment of the present invention, the operation is intuitively initiated 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.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the claims described below, as well as all scopes equivalent to or equivalently changed from the scope of the claims, are included in the spirit of the present invention. It would be said to fall into the category.

1: Chemical injection device
10: reservoir
50: Base body
100: Needle assembly
200: reservoir
300: drive module
400: drive unit
410: load
420: driving wheel
500: Clutch unit
510: Coupler
520: inserter
600: Trigger absent
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 drive unit including a rod that is connected to a plunger disposed inside the reservoir and moves along the reservoir, and a drive wheel that transmits a driving force to the rod;
a clutch unit disposed between the rod and the driving wheel; and
A trigger member rotatably disposed on one side of the base body and coupling the rod and the driving wheel by applying pressure to the clutch unit. According to claim 1,
The needle assembly rotates the trigger member by forcing one end of the trigger member to rotate in one direction,
The trigger member rotates so that the other end pushes the coupler of the clutch unit, so that one end of the coupler is separated from the drive wheel. According to claim 1,
The trigger member is
A drug injection device that forces the clutch unit after the cannula of the needle assembly is inserted. According to claim 1,
The base body is
A chemical injection device comprising a stopper that limits the rotation distance of the trigger member. According to claim 1,
The clutch unit is
an inserter inserted into the rod; and
A coupler disposed outside the inserter, one end of which is detachably mounted on the drive wheel. According to clause 5,
The driving wheel is
a first supporter disposed on one side and supporting one end of the coupler to maintain the expanded diameter of the coupler; and
A second supporter disposed on the one surface to be spaced apart from the first supporter and supporting one end of the coupler to maintain the diameter of the coupler contracted.