KR20210040712A - 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 rod connected to a plunger disposed inside the reservoir and moving along the reservoir, a driving unit having a driving wheel that transmits driving force to the rod; a clutch unit disposed between the rod and the drive wheel; and a trigger member that is rotatably disposed on one side of the base body and couples the rod and the driving wheel by applying the clutch unit. The drug injection device of the present invention can be safely operated and can deliver drugs accurately.

Description

Chemical liquid injection device {Apparatus for Infusing medical liquid}

The present invention relates to a chemical liquid injection device.

In general, a drug solution injection device such as an insulin injection device is used to inject a drug solution into a patient's body. Such a chemical injection device is also used by professional medical personnel such as a doctor or a nurse, but in most cases, it is used by the patient himself or a general person such as a guardian.

In the case of diabetic patients, especially pediatric diabetic patients, it is necessary to inject a drug such as insulin into the human body at predetermined intervals. A patch-type drug injection device is being developed that is attached to the human body for a certain period of time, and such a drug solution injection device can be used in a state of being attached to the human body such as the abdomen or waist of a patient for a certain period of time.

In order to increase the effect through the injection of the drug, the drug injection device needs to be controlled to precisely inject the drug into the patient's body, and it is important to precisely inject a small amount of the drug through the small drug injection device.

When the chemical injection device is attached to the human body, it has an excellent fit, convenient use, excellent durability, and a need to be driven with low power. In particular, since the drug injection device is directly attached to the skin of the patient and used, it is important for the user to conveniently and safely operate the drug injection device.

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

One aspect of the present invention is 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, a drive wheel that transmits a driving force to the rod, a clutch unit disposed between the rod and the drive wheel, and rotatable on one side of the base body And a trigger member configured to couple the rod and the driving wheel by applying the clutch unit.

In addition, the needle assembly rotates in one direction to rotate the trigger member by pressing one end of the trigger member, and the other end of the trigger member is rotated to force the coupler of the clutch unit, so that one end of the coupler is driven Can be separated 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 that limits a 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, and one end is mounted to be detachable from the driving wheel.

In addition, the driving wheel is disposed on one surface to support one end of the coupler so as to maintain an expanded diameter of the coupler, and is disposed to be spaced apart from the first supporter on the one surface, and the diameter of the coupler A second supporter for supporting one end of the coupler may be provided to maintain the contracted state.

The chemical solution 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 chemical solution, and the clutch unit connects the driving unit and the driving module so that the chemical solution is transferred from the reservoir to the needle. Can be injected, and at the same time the driving of the driving module is started. Accordingly, the user can simply rotate the needle assembly to safely start driving the chemical solution injection device.

In the chemical solution injection device and the driving method thereof according to the present invention, after the cannula of the needle assembly is inserted into the object, the structure for discharging the chemical solution is driven and connected by the clutch unit, so that a safe and quantitative drug can be injected into the object. I can.

The chemical solution injection device and its driving method according to the present invention are intuitively started by rotation of the needle assembly, and 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 secured. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing a chemical solution injection device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an internal arrangement of the chemical solution injection device of FIG. 1.
3 is a plan view showing the chemical solution 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 driving of the needle assembly of FIG. 2.
6 is a perspective view showing a partial configuration of FIG. 3.
7 is a perspective view showing that the trigger member of FIG. 6 rotates to drive the clutch unit.
8 is a cross-sectional view showing a coupling relationship between the reservoir of FIG. 6 and a clutch unit.
9 is a cross-sectional view showing a coupling relationship between the reservoir of FIG. 7 and a clutch unit.
Fig. 10 is a diagram showing an arrangement relationship between the drive wheel and the clutch unit of Fig. 6;
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 solution injection device according to another embodiment of the present invention.
13 is a flow chart showing some of the steps in FIG. 12.

Since the present invention can apply various transformations and have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. Effects and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together 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 describing with reference to the drawings, the same or corresponding constituent elements are assigned the same reference numerals, and redundant descriptions thereof will be omitted. .

In the following examples, expressions in the singular include plural expressions unless the context clearly indicates otherwise.

In the following embodiments, terms such as include or have means that the features or elements described in the specification are present, and do not preclude the possibility of adding one or more other features or components in advance.

When a certain embodiment can be implemented differently, a specific process order may be performed differently from the described order. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the described order.

In the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the following embodiments are not necessarily limited to those shown.

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

Referring to FIG. 1, the chemical solution injection device 1 is attached to an object in which the chemical solution is injected, and may inject the chemical solution stored therein in a quantity set for the user. In an optional embodiment, the chemical injection device 1 may be mounted on the user's body. In addition, as another alternative embodiment, the chemical solution injection device 1 may be mounted on an animal to inject the chemical solution.

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

The chemical injection device 1 may be connected to a remote device 2 connected by wire or wirelessly. The user can operate the remote device 2 to use the chemical solution injection device 1 and monitor the state of use of the chemical solution injection device 1. For example, it is possible to monitor the amount of the chemical liquid injected from the chemical liquid injection device 1, the number of injection of the chemical liquid, the amount of the chemical liquid stored in the reservoir 200, the user's bio information, etc., and based on this, the user can monitor the chemical liquid 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 or wireless communication environment. Here, the remote device 2 may be a user's portable terminal. To explain this in more detail, the remote device 2 includes a computer (e.g., desktop, laptop, tablet, etc.), a media computing platform (e.g., cable, satellite set-top box, digital video recorder), and a handheld computing device ( For example, PDA, email client, etc.), any form of a mobile phone, a form of a wearable device that can be attached or attached to the user's body, or any form of another kind of computing or communication platform. However, the present invention is not limited thereto.

The chemical injection device 1 and the remote device 2 can communicate through a communication network. In this case, the communication network refers to a communication network that provides an access path so that the remote device 2 can transmit and receive data after accessing a service server (not shown). Communication networks are wired networks such as LANs (Local Area Networks), WANs (Wide Area Networks), MANs (Metropolitan Area Networks), ISDNs (Integrated Service Digital Networks), and wireless networks such as wireless LANs, CDMA, Bluetooth, and satellite communications. However, the scope of the present invention is not limited thereto.

According to FIG. 1, the remote device 2 is shown to be 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 liquid injection device 1.

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

Referring to FIGS. 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 components arranged in an inner space between the housing 5 and the attachment portion 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. It may include 700.

The base body 50 forms the 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 covering the upper side of the inner parts and a second body 50b covering the lower side of the inner parts may be provided. The first body 50a and the second body 50b are assembled, so that the internal parts of the chemical injection device 1 may be fixed to 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 moving 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 so as to contact the first end 610 of the trigger member 600, and does not rotate in the opposite direction after the first end 610 rotates in one direction. You can limit the distance.

In detail, the first stopper 52 may include an upper surface 52a formed such that a surface in contact with the trigger member 600 protrudes obliquely (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 may rotate the trigger member 600 smoothly by rotation.

The first stopper 52 may have a side wall 52b that limits the rotation direction of the trigger member 600. The sidewall 52b may extend from the upper surface 52a and may be formed to be 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 by a preset rotation distance, so that the chemical solution injection device 1 Stability can be ensured.

The second stopper 53 is disposed adjacent to the reservoir 200, the drive unit 400, and the clutch unit 500. The second stopper 53 is disposed so as to protrude from the base body 50 as well, so that the movement distance of the second end 620 of the trigger member 600 may be limited. In one embodiment, the extension line in the length direction of the second stopper 53 may pass through the center of the rotation shaft 51.

5A to 5C are cross-sectional views illustrating driving of the needle assembly 100 according to an exemplary 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) 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). have.

The sleeve 110 forms the appearance of the needle assembly 100 and may rotate about a longitudinal direction. An elastic member 120 is disposed inside the sleeve 110, so that the sleeve 110 may receive an 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 force 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 rise or fall.

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. In addition, 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, the needle N also moves when the first holder 130 moves in the axial direction. The first holder 130 is disposed in the inner space of the sleeve 110, and the elastic member 120 is disposed above it.

The first holder 130 may include a guide groove 131 on an 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 to a preset path formed by the guide groove 131 so that the first holder 130 may move up or down.

The guide groove 131 may include a first stopping groove 131a, an elevating groove 131b, an inclined groove 131c, a second stopping groove 131d, and a movement limiting groove 131e. The first stopping groove 131a is a groove in which the moving protrusion 115 is initially located, and the elastic member 120 maintains a contracted state. 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 predetermined 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 stopping groove 131d is a groove in which the moving protrusion 115 returns to the 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 may support the cannula C. The second holder 140 is formed of a flexible material, and when an external force is applied, the shape may be instantly deformed.

The second holder 140 maintains contact with the first holder 130 in the positions of 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 is It is fixed to the body 50.

A cannula (C) is inserted in 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 protrudes outward from the central body 141 and may be formed to be flexible. The locking protrusion 142 may be provided in plural. 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 if the first holder 130 is raised and lowered 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 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 part 55 when it moves in the downward direction, the sensor 143 can measure whether it is in contact with the contact part 45 disposed above the base 40. . When the sensor 143 is formed of a conductive material and contacts the contact portion 45, an electrical signal is generated, so that 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 or released into the cannula (C) by the axial movement of the first holder (130). One end of the needle (N) is connected to the reservoir (200) so that the chemical solution can be delivered, and the other end is 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 capable of accommodating the needle (N), the chemical liquid discharged from the needle (N) can be injected into 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 by the patch (P), it is possible to prevent the cannula (C) from being separated during storage or movement.

5A, the needle N and the cannula C are initially disposed inside the needle assembly 100. When the user rotates the sleeve 110 for the first time, the moving protrusion 115 moves in the i direction and crosses the first stopping groove 131a.

As shown in FIG. 5B, by the expansion force of the elastic member 120, the first holder 130 descends. 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 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 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 for the second time, the moving protrusion 115 moves in the k direction along the inclined groove 131c and is inserted into the second stopping 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 increases with the rise of the first holder 130. Recontracted by

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

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

Referring back 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 a chemical solution is stored by the barrel 210 and the cap cover 220 (see FIG. 8 ). Inside the reservoir 200, the plunger 230 linearly moves, so that the chemical liquid may be discharged to the needle N.

The plunger 230 is provided with a sealing part 240 at a portion in contact with the inner wall of the barrel 210, so that a chemical liquid may be prevented from leaking when the plunger 230 is moved.

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 may linearly move the plunger 230 into the reservoir 200, thereby discharging the chemical liquid.

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 by rotation of the driving wheel 420. The plunger 230 may move by linear movement 410.

The driving module 300 may use all kinds of devices having a chemical liquid suction power and a chemical liquid discharge output by electricity. For example, all types of pumps such as a mechanical displacement micropump and an electromagnetic motion micropump can be used. Mechanical displacement micropumps are pumps that use the motion of solids or fluids such as gears or diagrams to create a pressure difference to induce the flow of fluid.Diaphragm displacement pump and fluid displacement pump ), rotary pump, etc. Electromagnetic motion type micropumps are pumps that use electrical or magnetic energy directly to move fluids, and include electro hydrodynamic pumps (EHD), electro osmotic pumps, and magnetohydrodynamic pumps. Magneto hydrodynamic pump) and electro wetting pump.

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

6 to 9, the drive unit 400 is installed between the drive module 300 and the reservoir 200, the plunger disposed in the reservoir 200 by 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.

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 driveably connected to the driving module 300 and may rotate by driving the driving module 300. The driving wheel 420 may have a first connection end 421 and a second connection end 422, and may have a space in which the rod 410 can move. At least one of the first connection end 421 and the second connection end 422 is always drive-connected to the driving module 300, so that the driving wheel 420 may 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 a gear tooth so that the driving wheel 420 may rotate.

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 predetermined height t. The hub 423 may form a space in which the second flange 621 of the trigger member 600 can be inserted.

The driving wheel 420 protrudes from one side and includes 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 to support the one end 511 of the coupler 510 so as to maintain the expanded diameter of the coupler 510.

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

When the coupler 510 is separated from the first supporter 424, the coupler 510 grips the inserter 520 while reducing its diameter. Since the coupler 510 contracts to a set radius, a preset grip force may be provided to the inserter 520.

The clutch unit 500 may drively connect 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 portion of the inserter 520 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 shape of a screw and a thread, respectively. A thread is formed on the outer circumferential surface of the rod 410, and a thread is formed on the inner circumferential surface of the inserter 520 to be connected in a screw connection form. As shown in FIG. 7, when the coupler 510 presses 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 outside the inserter 520 and, when activated, may connect the rod 410 and the driving wheel 420. The coupler 510 is a component capable of pressing the outside of the inserter 520 with an elastic force, and is not limited to a specific shape. However, in the following description, 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, but 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.

Therefore, when the 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 driveably separated. However, when the 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 diagram 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 are driven by the drive wheel 420 ) Inside the space can be moved. 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, the inserter 520 also rotates when the drive wheel 420 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 a predetermined flexibility so as to be engaged with the driving unit 400 by an elastic force applied by the coupler 510.

The trigger member 600 may generate a mechanical signal in 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 is connected to the driving unit 400 ) To drive.

The trigger member 600 may rotate in one direction around the rotation shaft 51. In this case, 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 portions.

The trigger member 600 may have a first end 610 extending to 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. The rotation can be initiated. After the first end 610 rotates, the cut groove 612 is supported by the side wall 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 extends in a different direction from the first end 610, and may include a second flange 621 inserted between the one end 511 of the coupler 510 and the driving wheel 420. have. When the trigger member 600 rotates, the second flange 621 applies the 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 have a third end 630 extending to the driving module 300. The third end 630 extends toward the driving module 300 and may start driving the driving module 300.

The starter 650 maintains the drive 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 makes contact with the starter 650. When released, 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 move the driving shaft by applying a moving end of the driving module 300.

In one embodiment, the starter 650 may be formed in a spring shape having a predetermined elastic force, but is not limited thereto and may be formed in a stick shape having a predetermined elasticity.

One end of the starter 650 is mounted on the base body 50 and the other end of the starter 650 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 is connected to the battery 700 to control driving of the driving module 300. The battery 700 may be rechargeable or may be used for single use.

The chemical solution injection device 1 according to an embodiment of the present invention can be operated by a user simply and safely. 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 driving unit 400 to the driving module 300. Since the chemical solution can be injected by driving, and the driving of the driving module 300 is started at the same time, the chemical solution injection device 1 can be used simply and safely.

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

The chemical solution injection device 1 according to an embodiment of the present invention is intuitively started to be driven 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.

12 is a flowchart illustrating a method of driving a chemical solution injection device according to another exemplary 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 solution injection device 1 includes mounting the chemical solution injection device on the object (S10), rotating the needle assembly 100 (S20), and the needle assembly is a trigger member. The trigger member may be rotated by pressing (S30), and a step (S40) of transferring the chemical solution from the reservoir to the needle assembly may be provided.

In the step S10 of mounting the chemical solution injection device to the object, the attachment part 6 of the chemical solution 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 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 is rotated the second time, 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 of rotating the trigger member by the needle assembly pressing the trigger member (S30) 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 of coupling the rod and the rotating wheel by driving the clutch mechanism (S31) 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 rotating wheel by driving the clutch unit (S31), the second flange 621 of the trigger member 600 applies the one end 511 of the coupler 510 to the clutch unit 500. 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 by the driving module 300 may be transmitted to the plunger 230 through the driving unit 400. .

In the step of linearly moving the end of the drive shaft by applying the starter to the end of the drive shaft (S31), while the contact between the starter 650 and the third end 630 is released, the starter 650 stops the drive module 300 from being driven. Can be initiated. As for the drive shaft, as the starter 650 presses and passes through the end, the end moves linearly along the axis. Thereafter, the driving module 300 may linearly move the driving shaft repeatedly so that the driving force may be transmitted to the driving unit 400.

In the step of transferring the chemical solution from the reservoir to the needle assembly (S40), 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 drive shaft of the driving module. have.

The driving method of the chemical solution injection device 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 driving unit 400 to the driving module 300. Since the chemical solution can be injected by driving, and the driving of the driving module 300 is started at the same time, the chemical solution injection device 1 can be used simply and safely.

In the driving method of the chemical solution 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 chemical solution by the clutch unit 500 is driven and connected. Therefore, it is possible to inject a safe and quantitative drug into the subject.

In the driving method of the chemical solution injection device according to an embodiment of the present invention, the drive 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.

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

1: chemical liquid injection device
10: reservoir
50: base body
100: needle assembly
200: reservoir
300: drive module
400: drive unit
410: rod
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 drive unit including a rod connected to a plunger disposed inside the reservoir and moving along the reservoir, and a drive wheel for transmitting a driving force to the rod;
A clutch unit disposed between the rod and the drive wheel; And
Including, a chemical injection device that is rotatably disposed on one side of the base body and applies the clutch unit to a trigger member that couples the rod and the driving wheel. The method of claim 1,
The needle assembly rotates the trigger member by pressing one end of the trigger member by rotation in one direction,
The trigger member is a chemical liquid injection device wherein the other end of the trigger member is rotated to apply a coupler of the clutch unit, so that one end of the coupler is separated from the drive wheel. The method of claim 1,
The trigger member is
After the cannula of the needle assembly is inserted, the clutch unit is applied. The method of claim 1,
The base body
A chemical liquid injection device comprising a stopper that limits the rotation distance of the trigger member. The method of claim 1,
The clutch unit is
An inserter inserted into the rod; And
A coupler disposed on the outside of the inserter and having one end detachably mounted from the driving wheel. The method of claim 5,
The driving wheel is
A first supporter disposed on one surface to support one end of the coupler so as to maintain an expanded diameter of the coupler; And
A second supporter disposed to be spaced apart from the first supporter on the one surface to support one end of the coupler so as to maintain the contracted diameter of the coupler.

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