KR20240043601A - Needle assembly and apparatus for infusing medical liquid including the same - Google Patents

Abstract

The needle assembly includes a needle, a cannula into which the needle is inserted, a driving member that generates a driving force to move the needle and the cannula, and a holder on which the driving member is supported, and the holder rotates to move the needle and the cannula. The nuller can be moved in one direction, and the holder can be further rotated to move only the needle in the other direction.

Description

Needle assembly and drug injection device including the same {NEEDLE ASSEMBLY AND APPARATUS FOR INFUSING MEDICAL LIQUID INCLUDING THE SAME}

The present invention relates to a needle assembly and a chemical injection device including the same.

Generally, a drug injection device such as an insulin injection device is used to inject a drug solution into a 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 insert a needle or cannula into the patient's skin.

One object of the present invention is to provide a needle assembly that is simply driven.

Another object of the present invention is to provide a chemical injection device including a simply driven needle assembly.

A needle assembly according to embodiments of the present invention for achieving the above-described problem includes a needle, a cannula into which the needle is inserted, a driving member that generates a driving force to move the needle and the cannula, and the driving member supports The holder may rotate to move the needle and the cannula in one direction, and the holder may further rotate to move only the needle in another direction.

In addition, it further includes a first sliding member to which the needle is fixed, and a second sliding member to which the cannula is fixed and disposed adjacent to the first sliding member, and the holder may be connected to the first sliding member. .

In addition, it further includes a locking member disposed in a movement path of the first sliding member and the second sliding member, and the second sliding member can be fixed by being caught by the locking member.

Additionally, the holder may include a holder protrusion protruding downward from a bottom surface, and the first sliding member may include a curved first slot hole into which the holder protrusion is inserted on one surface.

In addition, it further includes a sliding rail that provides a movement path for the first sliding member and the second sliding member, and the sliding rail may include a curved second slot hole on one surface into which the holder protrusion is inserted.

Additionally, the holder protrusion may move circularly along the first slot hole and the second slot hole.

A chemical injection device according to embodiments of the present invention for achieving the above-described other problems includes a base body, a reservoir unit mounted on the base body, storing a chemical liquid, mounted on the base body, and injecting the chemical liquid into the user's body. It includes a needle assembly for injecting, and a driving module connected to the reservoir unit to transfer the chemical solution from the reservoir unit to the needle assembly, wherein the needle assembly includes a needle, a cannula into which the needle is inserted, the needle, and A driving member that generates a driving force to move the cannula, and a holder on which the driving member is supported, the holder rotates to move the needle and the cannula in one direction, and the holder further rotates to move the needle and the cannula in one direction. The connector can only move the needle in another direction.

In the needle assembly according to exemplary embodiments, the needle assembly operation can be efficiently performed by a single operation of pressing a button by the user, thereby minimizing the probability of failure during the needle assembly operation.

Accordingly, the medicine injection device including the needle assembly can safely and simply inject a fixed amount of medicine into the user's body.

1 is a perspective view showing a chemical solution injection device according to example embodiments.
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 drug injection device of FIG. 2.
Figure 4 is a perspective view showing the needle assembly of Figure 2;
5A to 7C are side views and cross-sectional views showing the driving operation of the needle assembly.

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.

FIG. 1 is a perspective view showing a drug injection device according to exemplary embodiments, FIG. 2 is a perspective view showing the internal arrangement of the drug injection device of FIG. 1, and FIG. 3 is a plan view showing the drug injection device of FIG. 2. am.

Referring to Figures 1 to 3, the medicine injection device 1 is attached to the user's skin, etc., and can inject the medicine stored inside in a fixed amount set to the user. The chemical injection device 1 can be used for various purposes depending on the type of chemical solution to be injected. Additionally, the chemical injection device 1 can be mounted on not only humans but also animals to inject the chemical solution.

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 use status 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 unit 200, the user's bio information, etc. can be monitored, and based on this, the user can inject the drug. The device (1) can be driven.

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.

In 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.

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 internal parts disposed 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 unit 200, a drive module 300, a drive unit 400, a clutch unit 500, a trigger member 600, and It may include a battery 700.

The base body 50 forms the basic frame of the housing 5, is mounted in the internal space of the housing 5, and can fix the internal parts of the chemical injection device 1 at preset positions. In one embodiment, the base body 50 may include a first body that covers the upper side of the internal components and a second body that covers the lower side of the internal components. In another embodiment, the base body 50 may be formed as an integrated frame.

Figure 4 is a perspective view showing the needle assembly of Figure 2;

Referring to FIG. 4 , the needle assembly 100 may include a needle (N), a cannula (C), a driving member 120, and a holder 130. Furthermore, the needle assembly 100 includes a button 101, a lifting member 110, a fixing member 140, a locking member 150, a sliding rail 160, a first sliding member 172, and a second sliding member ( 174), a guide member 180, and a tube T (see FIGS. 2 and 5A to 5C). Meanwhile, for convenience of understanding the structure of the needle assembly, the button 101 is removed from Figure 4.

The button 101 may form the exterior of the needle assembly 100.

The lifting member 110 is disposed on the bottom of the button 101 and can be raised and lowered. The lifting member 110 may include a lifting body 111 and a lifting protrusion 112.

The lifting body 111 can be raised and lowered by user manipulation. In exemplary embodiments, a user may elevate or lower the lifting body 111 by manipulating the button 101 exposed to the outside.

The lifting protrusion 112 may be disposed adjacent to the fixing member 140 at the lower part of the lifting body 111. The lifting protrusion 112 may rise and fall together as the lifting body 111 rises and falls, and this allows the fixing member 140 to fix and rotate the holder 130. Details of how the fixing member 140 fixes and rotates the holder 130 will be described in detail later.

In one embodiment, one surface of the lifting protrusion 112 adjacent to the fixing member 140 may be inclined with respect to the lifting direction. In one embodiment, the width of the portion of the lifting protrusion 112 adjacent to the fixing member 140 in a horizontal direction substantially perpendicular to the lifting direction may become smaller from the top to the bottom.

The driving member 120 may be disposed adjacent to the lower part of the lifting member 110 and may generate a driving force to move the needle N and the cannula C.

In exemplary embodiments, the driving member 120 may be a spring that has a clockwise or counterclockwise rotational force with the longitudinal direction as the rotation axis.

The holder 130 may support the driving member 120. In exemplary embodiments, the holder 130 may be coupled to the driving member 120, and thus rotate together in the clockwise or counterclockwise direction when the driving member 120 rotates clockwise or counterclockwise. can do.

The holder 130 includes a holder body 131 including a lower part supporting the driving member 120 and an upper part protruding in the direction of the rotation axis of the driving member 120, and is formed on the bottom of the holder body 131 and protrudes downward. It may include a holder protrusion 132, a coupling groove (not shown) formed on the lower part of the holder body 131, and a fixing groove (not shown) formed on the upper part of the holder body 131. In exemplary embodiments, the holder protrusion 132 may be provided eccentrically with respect to the rotation axis.

The driving member 120 may have a shape that surrounds the upper part of the holder body 131 while being supported by the lower part.

The driving member 120 and the holder 130 can be coupled by coupling the lower end of the driving member 120 to the coupling groove, and thus the holder 130 can receive the rotational force of the driving member 120.

The holder 130 is fixed by positioning the fixing member 140 in the fixing groove, and can rotate by leaving the fixing member 140 from the fixing groove.

The fixing member 140 has a contact portion 141 that overlaps the lifting member 110 in the lifting direction, and a contact portion 141 that overlaps the first sliding member 172 and the second sliding member 174 in the lifting direction. It may include a fixing part 142.

In exemplary embodiments, the contact portion 141 may contact the lifting member 110 when the lifting member 110 is lifted. In one embodiment, the surface of the contact portion 141 in contact with the lifting member 110 may be inclined with respect to the lifting direction. In one embodiment, the width of the contact portion 141 in the horizontal direction may increase from top to bottom.

In exemplary embodiments, the fixing part 142 may be arranged to penetrate the fixing hole 161 of the sliding rail 160. The fixing part 142 protrudes from the fixing hole 161 and comes into contact with one surface of the second sliding member 174, and can fix the second sliding member 174.

In exemplary embodiments, the contact portion 141 contacts the lifting protrusion 112 when the lifting member 110 is lowered and moves away from the sliding rail 160 in the horizontal direction by the downward force of the lifting member 110. It can move in the first direction. At this time, the fixing member 140 may separate from the fixing groove and the fixation of the holder 130 may be released. Additionally, the fixing part 142 may be released from contact with the second sliding member 174, thereby releasing the fixation of the second sliding member 174.

Details of how the fixing member 140 releases the fixation of the holder 130 and the second sliding member 174 will be described in detail later.

The locking member 150 may include a body portion 151 coupled to one side of the sliding rail 160 and a locking portion 152 disposed at the front of the sliding rail 160.

The locking portion 152 is disposed on the movement path of the first sliding member 172 and the second sliding member 174, and may have an inclined end and a horizontal end of the locking portion 152.

The sliding rail 160 is disposed adjacent to the driving member 120 and the holder 130 and may provide a movement path for the first sliding member 172 and the second sliding member 174.

The first sliding member 172 and the second sliding member 174 can move linearly in one direction and the other direction on the sliding rail 160. At this time, the second sliding member 174 is fixed in the extended position by being caught by the locking portion 152 disposed on the front portion of the sliding rail 160, and only the first sliding member 172 can be returned to its original position. Here, one direction refers to the direction of moving from the original position to the extended position, and the other direction refers to the direction of moving from the extended position to the original position. Specific details regarding the movement of the first sliding member 172 and the second sliding member 174 will be described in detail later.

The first sliding member 172 may have a curved first slot hole 173 into which the holder protrusion 132 is inserted on one surface adjacent to the holder 130. In one embodiment, the first slot hole 173 may be curved in the one direction.

Meanwhile, the sliding rail 160 may be provided with a curved second slot hole 162 into which the holder protrusion 132 is inserted on one surface adjacent to the holder 130. In one embodiment, the second slot hole 162 may be curved in the other direction.

In one embodiment, the first slot hole 173 and the second slot hole 162 may have substantially the same width.

Specific details about the movement of the holder protrusion 132 in the first slot hole 173 and the second slot hole 162 will be described in detail later.

The second sliding member 174 may be provided with a locking protrusion 175 on one side, and the locking protrusion 175 may be fixed to the locking portion 152. The catching protrusion 175 may have an inclined surface and a vertical surface. Specific details on fixing the second sliding member 174 will be described in detail later.

The needle N may be fixed to the first sliding member 172, and the cannula C may be fixed to the second sliding member 174.

That is, the needle (N) can move together with the movement of the first sliding member 172, and the cannula (C) can move together with the movement of the second sliding member 174.

Since the needle N is fixed to the first sliding member 172, it can be inserted into or uninserted from the cannula C by moving the first sliding member 172. One end of the needle (N) is connected to the reservoir unit 200 so that the drug 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 sliding member 174, it can be inserted into the user's skin by moving the second sliding member 174. Since the cannula (C) has a conduit shape that can accommodate the needle (N), the drug discharged from the needle (N) can be injected into the user.

5A to 7C are side views and cross-sectional views showing the driving operation of the needle assembly. Specifically, FIGS. 5A, 5B, 6A, 6B, 7A, and 7B are side views showing the driving operation of the needle assembly, and FIG. 5C is a driving operation of the needle assembly cut along line I-I of FIG. 4. It is a cross-sectional view, and FIGS. 6C and 7C are cross-sectional views showing the driving operation of the needle assembly.

Meanwhile, for convenience in understanding the driving operation of the needle assembly, the button 101 is removed from FIGS. 6A to 7C.

Referring to FIGS. 5A to 5C , the needle assembly 100 is placed in its original position, that is, in the position before the user uses the needle assembly 100.

The fixing member 140 may be located in the fixing groove, and thus the holder 130 can be fixed by the fixing member 140. That is, before the user uses the needle assembly 100, the driving member 120 is wound clockwise and has a counterclockwise rotational force, but this rotational force is suppressed by the holder 130 being fixed by the fixing member 140. It can be. That is, since the holder 130 is fixed, the first sliding member 172 connected to the holder 130 and the connector 190 can also be fixed in its original position, and the second sliding member 172 located in front of the first sliding member 172 The sliding member 174 may also be fixed in place.

At this time, the holder protrusion 132 may be located at one end of the first slot hole 172 and one end of the second slot hole 162.

6A to 6C, when the user presses the button 101 to lower the lifting member 110, the contact portion 141 of the fixing member 140 contacts the lifting protrusion 112 to move the lifting member 110. ) may move in the first direction by a downward force, and at this time, the fixing member 140 may be separated from the fixing groove. Specifically, one surface of the lifting protrusion 112 in contact with the fixing member 140 is inclined with respect to the lifting direction, and the width of the portion of the lifting protrusion 112 adjacent to the fixing member 140 in the horizontal direction is the upper part. becomes smaller from bottom to bottom, the surface of the contact part 141 in contact with the lifting member 110 is inclined with respect to the lifting direction, and the width of the contact part 141 in the horizontal direction increases from the top to the bottom, The contact portion 141 of the fixing member 140 may move in the horizontal direction by the downward force of the lifting member 110.

In addition, the fixing part 142 is inserted into the fixing hole 161 as the contact part 141 moves in the horizontal direction, so that the fixation of the second sliding member 174 by the fixing part 142 can be released. there is.

Accordingly, the holder 130 may rotate counterclockwise by the counterclockwise rotational force of the driving member 120. At this time, since the holder protrusion 132 of the holder 130 is in contact with the first sliding member 172, the first sliding member 172 and the second sliding member 174 move in the counterclockwise direction of the holder 130. It can be moved to the extended position by rotation. At this time, the needle N fixed to the first sliding member 172 and the cannula C fixed to the second sliding member 172 may be inserted into the user's skin together.

Meanwhile, when the first sliding member 172 and the second sliding member 174 are located in the extended position, the rotational force of the driving member 120 may be about 50% of that when it is wound and fixed.

At this time, the holder protrusion 132 may be located in the center of the first slot hole 172 and the center of the second slot hole 162.

Referring to FIGS. 7A to 7C , the holder 130 may further rotate counterclockwise by the counterclockwise rotational force of the driving member 120. At this time, the first sliding member 172 in contact with the holder protrusion 132 may return to its original position by rotating the holder 130 in a counterclockwise direction. However, the second sliding member 174 may be fixed in the extended position by being caught by the locking portion 152 of the locking member 150. In example embodiments, the locking portion 152 may have restoring force. In detail, while the inclined surface of the locking protrusion 175 passes under the locking portion 152, the locking portion 152 may bend upward, but may soon return to its original shape due to restoring force. Accordingly, since the vertical surface of the locking protrusion 175 can be caught by the horizontal end of the locking portion 152, the second sliding member 174 can be fixed in the extended position by the locking portion 152.

Accordingly, the needle N fixed to the first sliding member 172 is pulled out from the user's skin, but the cannula C fixed to the second sliding member 174 is still inserted into the user's skin. It can be maintained. However, the needle (N) and the cannula (C) are fluidly connected, so that the medical solution injected from the reservoir unit 200 can be injected into the user through the needle (N) and the cannula (C).

That is, the operation of the needle assembly 100 is such that when the holder 130 rotates, the connector 190 moves the needle (N) and the cannula (C) in one direction, and when the holder 130 rotates further, the connector 190 ) can be performed by moving only the needle (N) in another direction.

In one embodiment, when the first sliding member 172 returns to its original position, the contact portion 141 moves in the horizontal direction and in the second direction closer to the sliding rail 160, and the lifting protrusion 112 rises, so that the lifting member 110 can rise. Accordingly, the fixing member 140 can be positioned again in the fixing groove. Accordingly, since the holder 130 can be fixed again by the fixing member 140, the first sliding member 172 can be fixed in its original position. Accordingly, it is possible to prevent the needle N from being inserted into the user's skin again.

In another embodiment, the contact portion 141 does not move sufficiently in the second direction and the lifting protrusion 112 does not rise sufficiently, so that the fixing member 140 may not be properly positioned back in the fixing groove. However, since the driving member 120 has exhausted all of its rotational force, it cannot further rotate counterclockwise, and thus the first sliding member 172 can be fixed in its original position.

At this time, the holder protrusion 132 may be located at the other end of the first slot hole 172 and the other end of the second slot hole 162.

Meanwhile, insertion of the needle N and the cannula C into the user's skin is performed by pressing the user's button 101, but withdrawal of the needle N from the user's skin is performed using the lifting member 110. ) and is automatically performed due to the movement of the fixing member 140, the operation of the needle assembly 100 can be performed by a single action of pressing the button 101 of the user. That is, since the operation of the needle assembly 100 can be performed efficiently, the probability of failure during the operation of the needle assembly 100 can be minimized.

Meanwhile, the operation of the needle assembly 100 may be performed by converting the rotational movement of the driving member 120 into the linear movement of the first sliding member 172 and the second sliding member 174.

In addition, since the holder protrusion 134 is provided eccentrically with respect to the rotation axis, while the first sliding member 172 and the second sliding member 174 move, the holder protrusion 131 forms a curved first slot hole 173. and can move circularly along the second slot hole 162.

Additionally, the first slot hole 173 and the second slot hole 162 may overlap each other. In one embodiment, before and after the operation of the needle assembly 100, one end and the other end of the first slot hole 173 and one end and the other end of the second slot hole 162 may overlap, respectively. In one embodiment, during operation of the needle assembly 100, the first slot hole 173 and the second slot hole 162 may overlap except for both ends.

Meanwhile, in FIGS. 5A to 7C, the driving member 120 is shown to have a counterclockwise rotational force and is explained based on this. However, the present invention is not necessarily limited thereto, and the driving member 120 rotates clockwise. It can have a rotational force of .

Accordingly, the holder 130 may rotate clockwise by the clockwise rotational force of the driving member 120. In one embodiment, the first slot hole 173 may be curved in the other direction.

Referring again to FIGS. 2 and 3 , the reservoir unit 200 is mounted on the base body 50 and can store a chemical solution.

The reservoir unit 200 may have an inlet end and an outlet end. A chemical solution is injected into the inlet end, a needle (N) is installed at the outlet end, and the chemical solution can be discharged through the needle (N).

The driving module 300 may generate driving force and transmit the driving force to the driving unit 400.

When the drive units 400 are engaged with each other by the clutch unit 500, the drive module 300 rotates the drive unit 400, and the reservoir unit 200 is rotated by the rotation of the drive unit 400. The chemical solution stored in may be discharged.

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.

The trigger unit 600 may initiate driving of the driving module 300 and connect the driving units 400 to each other. The trigger unit 600 includes first to third trigger members 610, 620, and 630, and may be rotatably disposed on the base body 50. When the user presses the button 101 of the needle assembly 100, the lifting member 110 pushes the first trigger member 610 to initiate rotation of the first trigger member 610, and the first trigger member 610 ) may rotate around the rotation axis to apply force to the clutch unit 500. At the same time, the first trigger member 610 starts the rotation of the second trigger member 620, and the second trigger member 620 rotates about the rotation axis to force the third trigger member 630. there is. Accordingly, the third trigger member 630 may rotate about the rotation axis to apply force to the driving module 300. Accordingly, the trigger unit 600 may apply force to the drive module 300 to drive the drive module 300 and may apply force to the clutch unit 500 to connect the drive units 400 to each other.

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

As described above, the operation of the needle assembly 100 can be efficiently performed by a single operation of pressing the button 101 by the user, thereby minimizing the probability of failure during operation of the needle assembly 100.

Accordingly, the medicine injection device 1 including the needle assembly 100 can safely and simply inject a fixed amount of medicine into the user's body.

Although the present invention has been described above with reference to embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it is possible.

1: Chemical injection device 5: Housing
6: Attachment 50: Base body
100: Needle assembly 200: Reservoir unit
300: driving module 400: driving unit
500: Clutch unit 600: Trigger unit
700: Battery N: Needle
C: Cannula

Claims (7)

You guys;
a cannula into which the needle is inserted;
a driving member that generates a driving force to move the needle and the cannula; and
Includes a holder on which the driving member is supported,
A needle assembly wherein the holder rotates to move the needle and the cannula in one direction, and the holder further rotates to move only the needle in another direction. According to claim 1,
a first sliding member to which the needle is fixed; and
It further includes a second sliding member to which the cannula is fixed and disposed adjacent to the first sliding member,
The needle assembly is wherein the holder is connected to the first sliding member. According to clause 2,
It further includes a locking member disposed on a movement path of the first sliding member and the second sliding member,
The second sliding member is fixed to the locking member. According to clause 2,
The holder includes a holder protrusion protruding downward from the bottom,
The first sliding member includes a curved first slot hole on one surface into which the holder protrusion is inserted. According to clause 4,
It further includes a sliding rail that provides a movement path for the first sliding member and the second sliding member,
The sliding rail includes a curved second slot hole on one surface into which the holder protrusion is inserted. According to clause 5,
The needle assembly wherein the holder protrusion moves circularly along the first slot hole and the second slot hole. base body;
a reservoir unit mounted on the base body and storing a chemical solution;
a needle assembly mounted on the base body and injecting a chemical solution into the user's body; and
It includes a driving module connected to the reservoir unit to transfer the chemical solution from the reservoir unit to the needle assembly,
The needle assembly is
You guys;
a cannula into which the needle is inserted;
a driving member that generates a driving force to move the needle and the cannula; and
Includes a holder on which the driving member is supported,
A drug injection device in which the holder rotates to move the needle and the cannula in one direction, and the holder further rotates to cause the connector to move only the needle in another direction.

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