KR102608069B1 - Needle assembly and drug injection device comprising the same - Google Patents

Abstract

The present invention provides a needle assembly and a drug injection device including the same, comprising: a needle, a cannula into which the needle is inserted, a first holder supporting the needle, a sleeve on which the first holder is disposed in an internal space, and A second holder supports the cannula and is disposed to face one side of the first holder, and has a first end and a second end extending outward, wherein at least one of the first end and the second end is It has a resection part in which a portion is removed to a preset length.

Description

Needle assembly and drug injection device comprising the same}

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

Generally, drug injection devices such as insulin injection devices are used to inject drugs 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 drugs such as insulin into the body at set intervals. Therefore, a patch-type drug injection device that is attached to the human body for a certain period of time is being developed. This drug injection device can be used in the form of a patch attached to the patient's body, such as the abdomen or waist, for a certain period of time.

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 attached to the patient's skin, the user must simply and conveniently insert a needle or cannula into the patient's skin.

Korea Patent Publication No. 10-2020-0019528 (2020.2.24.)

The present invention provides a needle assembly and drug delivery device that a user can operate simply and accurately.

One aspect of the present invention includes a needle, a cannula into which the needle is inserted, a first holder supporting the needle, a sleeve on which the first holder is disposed in an internal space, and a sleeve supporting the cannula and the first holder. It is disposed to face each other on one side and includes a second holder having a first end and a second end extending outwardly, wherein at least one of the first end and the second end has a cut portion in which a part of the first end and the second end are removed to a preset length. The branch provides a needle assembly.

In addition, at least one of the first end and the second end extends so that an end protrudes from the outer peripheral surface of the first holder, and a portion of the cut portion may be disposed outside the outer peripheral surface of the first holder in the radial direction. .

Additionally, another part of the cutting portion may be disposed between the inner and outer peripheral surfaces of the first holder.

Additionally, the first end may have a first cutting portion that extends to one side and has a slit shape with an open end.

In addition, the second end extends to the other side, and when extended in the longitudinal direction, the second end may have a second cut portion having a closed opening at the end.

Additionally, the second holder may have the second end placed at a higher position than the first end, and a sensor may be placed at an end of the second end.

Another aspect of the present invention includes a base body, a housing disposed on an upper part of the base body, a sleeve mounted on the base body and the housing, and a first holder inserted into the inner space of the sleeve and supporting the needle. and a second holder that supports the cannula into which the needle is inserted and is disposed to face one side of the first holder and has a first end and a second end extending outward, and the first end and the second end. At least one of the stages provides a drug injection device having a resection part partially removed to a preset length.

In addition, at least one of the first end and the second end extends so that an end protrudes from the outer peripheral surface of the first holder, and a portion of the cut portion may be disposed outside the outer peripheral surface of the first holder in the radial direction. .

In addition, at least one of the first end and the second end may have a locking protrusion protruding from the outside of the cutting part, and the base body may have a ledge that supports the locking protrusion when the second holder is lowered. .

Additionally, the first end may have a first cutting portion that extends to one side and has a slit shape with an open end.

In addition, the second end extends to the other side, and when extended in the longitudinal direction, the second end may have a second cut portion having a closed opening at the end.

In addition, the second holder has the second end disposed at a higher position than the first end, and a sensor is disposed at the end of the second end, and the sensor is connected to the base body when the second holder is lowered. You can contact either side.

In the needle assembly and drug injection device according to the present invention, the cannula can be stably inserted and fixed into the object. When the first holder moves downward, the second holder also moves downward and the cannula and needle are inserted into the object. Afterwards, the position of the second holder is fixed, so the drug can be stably injected into the object. .

In the needle assembly and drug injection device according to the present invention, the cannula can be simply inserted into the subject. The second holder has a first end and a second end extending on both sides, and a portion of at least one of the first end and the second end is removed, so that the second holder can be deformed. When the second holder passes the ledge, the cutting portion allows deformation in the width direction of the first and second ends, so the second holder can simply pass through the ledge and its position can be fixed by the ledge.

1 is a block diagram showing a chemical injection system according to an embodiment of the present invention.
Figure 2 is a perspective view showing a chemical injection device according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of the chemical injection device of Figure 2.
Figure 4 is a cross-sectional view taken along line IV-IV of Figure 2.
Figure 5 is an exploded perspective view showing the needle assembly of Figure 3;
Figure 6 is a rear perspective view of the needle assembly of Figure 5;
7A and 7B are perspective views showing the second holder of FIG. 5.
8 to 10 are cross-sectional views showing the driving operation of the needle assembly of FIG. 5.
FIGS. 11 and 12 are cross-sectional views showing an operation in which the second holder of FIG. 5 is mounted.
Figure 13 is an exploded perspective view showing the needle cover assembly of Figure 3;

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 block diagram showing a chemical injection system 1 according to an embodiment of the present invention.

Referring to FIG. 1 , the drug injection system 1 may include a drug injection device 10, a user terminal 20, a controller 30, and a biometric information sensor 40. The drug injection system 1 allows the user to drive and control the system using the user terminal 20, and the drug injection device 10 injects the drug based on the blood sugar information monitored by the biometric information sensor 40. It can be injected periodically.

The drug injection device 10 injects drugs to be injected into the user, such as insulin, glucagon, anesthetics, painkillers, dopamine, growth hormone, and smoking cessation aids, based on data sensed by the biometric information sensor 40. It also performs a function.

Additionally, the chemical injection device 10 may transmit a device status message including information on the device's remaining battery capacity, whether the device was successfully booted, whether the injection was successful, etc., to the controller 30 . Messages delivered to the controller may be delivered to the user terminal 20 through the controller 30. Alternatively, the controller 30 may transmit improved data processed from the received messages to the user terminal 20.

In one embodiment, the chemical injection device 10 is provided separately from the biometric information sensor 40 and may be installed to be spaced apart from the object. In another embodiment, the drug injection device 10 and the biometric information sensor 40 may be provided in one device.

In one embodiment, the drug injection device 10 may be mounted on the user's body. Additionally, in another embodiment, the chemical injection device 10 can be mounted on an animal to inject the chemical solution.

The user terminal 20 may receive an input signal from the user to drive and control the chemical injection system 1. The user terminal 20 may generate a signal that drives the controller 30 and control the controller 30 to drive the chemical injection device 10. Additionally, the user terminal 20 can display biometric information measured from the biometric information sensor 40 and status information of the chemical injection device 10 .

The user terminal 20 refers to a communication terminal that can be used in a wired or wireless communication environment. For example, the user terminal 20 includes a smartphone, a tablet PC, a PC, a smart TV, a mobile phone, a personal digital assistant (PDA), a laptop, a media player, a micro server, a global positioning system (GPS) device, an e-book terminal, It may be a digital broadcasting terminal, navigation, kiosk, MP3 player, digital camera, home appliance, camera-equipped device, and other mobile or non-mobile computing devices. Additionally, the user terminal 2 may be a wearable device such as a watch, glasses, hair band, or ring equipped with a communication function and data processing function. However, as described above, terminals equipped with applications capable of Internet communication can be borrowed without limitation.

The user terminal 20 can be connected one-to-one with the pre-registered controller 30. The user terminal 20 may be encrypted and connected to the controller 30 in order to prevent the controller 30 from being driven and controlled by an external device.

In one embodiment, the user terminal 20 and the controller 30 may be separated and provided as separate devices. For example, the controller 30 may be provided to a subject equipped with the chemical injection device 10, and the user terminal 20 may be provided to the subject or a third party. The user terminal 20 is driven by the guardian, thereby improving the safety of the chemical injection system 1.

In another embodiment, the user terminal 20 and the controller 30 may be provided as one device. The controller 30, which is provided as one with the user terminal 20, can communicate with the drug injection device 10 to control the injection of the drug.

The controller 30 performs a function of transmitting and receiving data with the drug injection device 10, transmits a control signal related to the injection of drugs such as insulin to the drug injection device 10, and detects blood sugar levels from the biometric information sensor 40. Control signals related to measurement of biometric values, such as the like, can be received.

For example, the controller 30 may transmit an instruction request to measure the user's current state to the chemical injection device 10 and receive measurement data from the chemical injection device 10 in response to the instruction request.

The biometric information sensor 40 may perform a function of measuring the user's biometric values such as blood sugar level, blood pressure, and heart rate depending on the purpose. Data measured by the biometric sensor 40 may be transmitted to the controller 30, and the drug cycle and/or injection amount may be set based on the measured data. Data measured by the biometric information sensor 40 may be transmitted to the user terminal 20 and displayed.

As an example, the biometric information sensor 40 may be a sensor that measures the blood sugar level of the subject. It may be a continuous glucose monitoring (CGM) sensor. A continuous blood sugar measurement sensor can be attached to an object and continuously monitor blood sugar level.

The user terminal 20, the controller 30, and the chemical injection device 10 may communicate using a network. For example, networks include Local Area Network (LAN), Wide Area Network (WAN), Value Added Network (VAN), mobile radio communication network, satellite communication network, and their It is a comprehensive data communication network that includes mutual combinations and allows each network member to communicate smoothly with each other, and may include wired Internet, wireless Internet, and mobile wireless communication networks. In addition, wireless communications include, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy, ZigBee, WFD (Wi-Fi Direct), UWB (ultra wideband), and infrared communications (IrDA). Data Association), NFC (Near Field Communication), 5G, etc., but are not limited to these.

FIG. 2 is a perspective view showing a chemical injection device 10 according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of the chemical injection device 10 of FIG. 2, and FIG. 4 is according to lines IV-IV of FIG. 2. This is a cross-sectional view taken.

Referring to FIGS. 2 to 4 , the drug injection device 10 is attached to the user to inject the drug, and can inject the drug stored inside in a fixed amount set to the user.

The chemical injection device 10 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.

One embodiment of the chemical injection device 10 may include a housing 11 covering the outside and an attachment portion 12 located adjacent to the user's skin. The chemical injection device 10 includes a plurality of parts disposed in the internal space between the housing 11 and the attachment portion 12. A separate joining means may be further interposed between the attachment portion 12 and the user's skin, and the chemical injection device 10 may be fixed to the skin by the joining means.

The chemical injection device 10 includes a needle assembly 100, a reservoir unit 200, a driving module 300, a battery 350, a driving unit 400, a clutch unit 500, a trigger member 600, and a needle. It may include a cover assembly 700, an alarm unit 800, and a plurality of sensor units.

The chemical injection device 10 may have a base body forming a frame in which at least one body supports internal components. The base body may have a first body 13, a second body 14, and a third body 15 depending on the arrangement.

The first body 13 is disposed below the housing 11, and the needle assembly 100, reservoir unit 200, drive module 300, battery 350, etc. can be supported in each opening or groove. there is. The second body 14 is disposed below the first body 13 and may be connected to the attachment portion 12. The second body 14 may cover the lower portion of the chemical injection device 10. The third body 15 is disposed on the upper side of the first body 13 and supports the reservoir unit 200, drive module 300, battery 350, drive unit 400, etc. in each opening or groove. It can be. In the drawing, the first body 13, the second body 14, and the third body 15 are shown, but the present invention is not limited thereto and may be provided as one body or in plural pieces.

A control module may be placed inside the chemical injection device 10. A control module 16, which is a circuit board, is disposed below the second body 14 and can control the overall operation of the chemical injection device 10. The control module 16 can electrically contact the driving module 300, the battery 350, the alarm unit 800, and a plurality of sensor units to control their driving.

FIG. 5 is an exploded perspective view showing the needle assembly 100 of FIG. 3, and FIG. 6 is a rear perspective view of the needle assembly 100 of FIG. 5.

Referring to FIGS. 3 to 6 , the user of the drug injection device 10 can simply rotate the needle assembly 100 to insert the cannula into the object and start injection of the drug solution.

The needle assembly 100 may be mounted on the first body 13. In the needle assembly 100, the needle N and/or the cannula may be moved in the axial direction by rotation of the sleeve 110. The needle assembly 100 includes a sleeve 110, an elastic member 120, a first holder 130 and a second holder 140 that are holder units (HU), a needle (N), a cannula (C), and a patch ( P) can be provided.

The sleeve 110 forms the exterior of the needle assembly 100 and can rotate in the longitudinal direction about a central axis. The sleeve 110 may include a knob 111, a rotating body 112, and a support ring 113.

The knob 111 is mounted on the top of the rotating body 112 and may have a groove on the top surface. The user can rotate the sleeve 110 by manipulating the groove of the knob 111 exposed to the outside. An elastic member 120 is disposed on the lower surface of the knob 111, so that an expansion force can be transmitted when the elastic member 120 expands in the axial direction.

The rotating body 112 has a substantially cylindrical shape, and the opening at the top may be covered by the knob 111. A support ring 113 may be mounted on the outer top of the rotating body 112.

An elastic member 120 and a first holder 130 and a second holder 140, which are holder units HU, may be disposed in the internal space of the rotating body 112. A moving protrusion 115 may be disposed on the inner surface of the rotating body 112. The moving protrusion 115 may move along the guide groove 134 disposed on the outer peripheral surface of the first holder 130. When the rotating body 112 rotates, the moving protrusion 115 moves along the side walls of the guide groove 134, so that the first holder 130 can be raised or lowered.

Referring to FIG. 8, the movable protrusion 115 may include an inclined wall 115a and a vertical wall 115b. The inclined wall 115a induces stable contact when descending along the guide groove 134, and the vertical wall 115b contacts one side of the first holder 130 to limit the movement path of the moving protrusion 115. You can.

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. When the first holder 130 moves upward, the elastic member 120 may be compressed.

The elastic member 120 is not limited to a specific member and may be manufactured from various members that transmit elastic force in the longitudinal direction. However, for convenience of explanation, the description below will focus on the case where the elastic member 120 is in the form of a spring.

The holder unit (HU) can support the needle (N). In one embodiment, the holder unit (HU) may include a first holder 130 and a second holder 140, and may be equipped with a needle (N) and a cannula (C), respectively. In another embodiment, the holder unit (HU) is provided as one and only the needle (N) can be installed.

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 include a first main body 131, a connection block 132, a first space 133, and a guide groove 134. The first main body 131 is inserted into the rotating body 112 of the sleeve 110, and a first space 133 in which the elastic member 120 is disposed is formed.

The connection block 132 extends from one side of the first main body 131 and can support the needle (N). The connection block 132 may have a reinforcing end (132a), an extension end (132b), a slit (132c), and a first seating groove (132d).

The reinforcing end 132a is connected to the first main body 131 and may have a predetermined thickness. A needle (N) is inserted into the reinforcing end (132a), and the position of the needle (N) can be fixed. The second end 143 of the second holder 140 may be supported below the reinforcing end 132a. When the elastic member 120 expands, the reinforcing end 132a moves downward and applies force to the second end 143, thereby allowing the second holder 140 to be fixed to the second ledge 13b.

The extension end (132b) is connected to the reinforcement end (132a), and a first seating groove (132d) is disposed at the end. The second sensor CS2 may be inserted into the first seating groove 132d. The second sensor CS2 is disposed at the top of the end of the extension end 132b and is disposed to contact the connection portion of the sub-control module 16S.

The slit 132c may be installed in at least one of the reinforcement end 132a and the extension end 132b. The slit 132c can increase the flexibility of the connection block 132. In particular, the slit 132c can increase the flexibility of the extension end 132b to maintain constant contact between the second sensor CS2 and the connection portion of the sub-control module 16S.

Referring to FIG. 8, the first holder 130 may have a guide groove 134 on its outer surface. The guide groove 134 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 134, so that the first holder 130 can be raised or lowered.

The guide groove 134 may include a first stop groove (PT ₁ ), a first wall (PT ₂ ), a second wall (PT ₃ ), and a second stop groove (PT ₄ ).

The first stop groove (PT ₁ ) is a groove where the movable protrusion 115 is initially located, and the elastic member 120 maintains its contracted state here.

The first wall PT ₂ 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 may maintain contact with the first wall PT ₂ . When the first holder 130 moves downward, the first wall PT ₂ may guide the movement of the first holder 130.

The second wall PT ₃ extends to have a preset slope. When the moving protrusion 115 moves along the second wall PT ₃ , the elastic member 120 contracts again and the first holder 130 rises again.

The moving protrusion 115 is inserted into the second stop groove PT ₄ so that the first holder 130 can return to the reference position. At this time, the elastic member 120 maintains its contracted state again.

FIGS. 7A and 7B are perspective views showing the second holder 140 of FIG. 5.

Referring to FIGS. 5 to 7B , the second holder 140 is disposed to face one side of the first holder 130 and can support the cannula (C). The second holder 140 may have a second main body 141, a first end 142, and a second end 143.

The second holder 140 is arranged to face one side of the first holder 130 and can support the cannula (C).

In one embodiment, the second holder 140 may be formed of a material having a certain rigidity. The second holder 140 may be deformed by the first cut portion 142d and the second cut portion 143d. When the second holder () is inserted into the first ledge (13a) and the second ledge (13b), the shape of the second holder () may change instantaneously. In particular, the shapes of the first locking protrusion 142b and the second locking protrusion 143b of the second holder 140 change, so that the first locking protrusion 142b is inserted into the first ledge 13a, and the second locking protrusion 142b is inserted into the first ledge 13a. The locking protrusion 143b may be inserted into the second ledge 13b.

In another embodiment, the second holder 140 is made of a flexible material, and its shape can be instantaneously changed when an external force is applied. The flexibility of the second holder 140 may be increased by the first cut portion 142d and the second cut portion 143d.

The second holder 140 maintains contact with the first holder 130 at the position shown in FIGS. 8 and 9, but when the elastic member 120 contracts again as shown in FIG. 10, it is separated from the first holder 130 and is separated from the first holder 130. 1 It is fixed to the body (13).

A cannula (C) may be inserted into the center of the second main body 141, and a needle (N) may be selectively coupled thereto. A central hole 141CH into which the needle N is inserted may be disposed in the center of the second main body 141. Since the central hole (141CH) is arranged to face the cannula (C), the needle (N) passing through the central hole (141CH) can be inserted into the cannula (C).

The lower surface of the second main body 141 may have a first seating groove into which the cannula (C) is mounted. The cannula (C) may be inserted into the first seating groove. The upper surface of the second main body 141 may be in contact with the lower end of the first holder 130.

A plurality of alignment protrusions 141a may be disposed on the outside of the second main body 141. The alignment protrusion 141a is disposed to contact the inner peripheral surface of the first holder 130, so that the second holder 140 can be aligned within the first holder 130.

The alignment protrusion 141a of the second holder 140 is in contact with the first holder 130, thereby reducing shaking of the first holder 130 and the second holder 140. Additionally, only the alignment protrusion 141a contacts the inner peripheral surface of the first holder 130 to reduce friction. By reducing the contact area between the first holder 130 and the second holder 140, the friction between the first holder 130 and the second holder 140 can be reduced, and the second holder 140 is the first holder 140. It can be easily separated from the holder 130.

The second holder 140 has a first end 142 and a second end 143 extending outward, and at least one of the first end 142 and the second end 143 has a preset length. It is possible to have a resection area removed with .

At least one of the first end 142 and the second end 143 extends so that its end protrudes from the outer peripheral surface of the first holder 130, and a portion of the cut portion extends to the radial outer surface of the outer peripheral surface of the first holder 130. can be placed in Additionally, another part of the cutting portion may be disposed between the inner and outer peripheral surfaces of the first holder 130.

In one embodiment, the second holder 140 may have cutting portions disposed on both the first holder 130 and the second holder 140. In another embodiment, the second holder 140 may have an incised portion disposed on the first holder 130 or the second holder 140. However, for convenience of explanation, the following description will focus on an embodiment in which the cutting portions of both the first holder 130 and the second holder 140 are disposed.

The first end 142 protrudes outward from the second main body 141 and may be formed to be flexible. The first end 142 may have at least a portion cut along the center to increase flexibility.

The first end 142 may include a first extension tab 142a, a first locking protrusion 142b, a first inclined surface 142c, a first cutting portion 142d, and a first bump 142e.

The first extension tab 142a extends outward from the second main body 141. Referring to FIG. 6 , the first extension tab 142a extends in the radial direction and can be inserted into the guide portion 135 from which a portion of the first main body 131 of the first holder 130 is removed. The width of the guide portion 135 of the first holder 130 may be set to be larger than the width of the first extension tab 142a. The guide portion 135 contacts the first bump 142e protruding to the outside of the first extension tab 142a.

A portion of the first extension tab 142a may be inserted into the cut portion of the rotating body 112 of the sleeve 110. Since the cut portion of the rotating body 112 has a predetermined length in the circumferential direction, the first extension tab 142a does not interfere with the rotating body 112 even if the sleeve 110 rotates.

The first locking protrusion 142b may be disposed at the end of the first extension tab 142a. The first locking protrusion 142b may be mounted on the first ledge 13a when the second holder 140 descends.

The first inclined surface 142c may be disposed on the side of the first locking protrusion 142b. A first inclined surface 142c that descends downward and faces the center of the first extension tab 142a may be disposed on the side of the first locking protrusion 142b. The first inclined surface 142c may guide the first locking protrusion 142b to pass through the first ledge 13a.

The first cut portion 142d extends to one side of the first end 142 and may have a shape in which a portion of the first extension tab 142a is removed. In one embodiment, as shown in the drawing, the first cutting portion 142d may have a slit shape with an open end. In another embodiment, although not shown in the drawings, the first cutting portion 142d may have an opening shape with closed ends. However, for convenience of explanation, the following description will focus on the first cutting portion 142d, which has a slit shape with an open end.

The first cut portion 142d may extend along the longitudinal direction of the first extension tab 142a. The first cut portion 142d may extend along the center of the first extension tab 142a in the longitudinal direction to the end of the first extension tab 142a. In the drawing, the first cutting portion 142d is shown extending along the longitudinal direction of the first extension tab 142a with a constant width, but this is not limited, and the width of the first cutting portion 142d may vary. .

The first cut portion 142d may extend to protrude from the outer peripheral surface of the first holder 130. A portion of the first cut portion 142d may be disposed radially outside the outer peripheral surface of the first holder 130. A first locking protrusion 142b may be disposed on the outside of the portion of the first cutting portion 142d. In addition, the other part of the first cut portion 142d is inserted into the guide portion 135 of the first holder 130, and thus may be disposed between the inner peripheral surface and the outer peripheral surface of the first holder 130.

The first cut portion 142d may induce the first extension tab 142a to be deformed in the width direction. The first locking protrusion 142b is inserted into the first ledge 13a to fix the second holder 140. Since the first cutting portion 142d protrudes from the outer peripheral surface of the first holder 130 and is arranged parallel to the first locking protrusion 142b, the first cutting portion 142d has a first end 142 in the width direction. It can be deformed and stably inserted and fixed to the first ledge (13a).

The first bump 142e protrudes outward from the first extension tab 142a. The first bump 142e may contact the guide portion 135 of the first holder 130 and guide the movement of the second holder 140. When the second holder 140 descends, the first bump 142e moves along the guide portion 135 of the first holder 130. Since the first bump 142e maintains contact with the guide portion 135, shaking of the second holder 140 can be reduced and linear movement of the second holder 140 can be guided.

The second end 143 includes a second extension tab 143a, a second locking protrusion 143b, a second inclined surface 143c, a second cutting portion 143d, a second bump 143e, and a second seating groove ( 143f) can be provided.

The second extension tab 143a extends outward from the second main body 141. Referring to FIG. 6 , the second extension tab 143a extends in the radial direction and can be inserted into the guide portion 135 from which a portion of the first main body 131 of the first holder 130 is removed. The width of the guide portion 135 of the first holder 130 may be set to be larger than the width of the second extension tab 143a. The guide portion 135 contacts the second bump 143e protruding to the outside of the second extension tab 143a.

A portion of the second extension tab 143a may be inserted into the cut portion of the rotating body 112 of the sleeve 110. Since the cut portion of the rotating body 112 has a predetermined length in the circumferential direction, the second extension tab 143a does not interfere with the rotating body 112 even if the sleeve 110 rotates.

The second locking protrusion 143b may be disposed at the end of the second extension tab 143a. The second locking protrusion 143b may be mounted on the second ledge 13b when the second holder 140 descends.

The second inclined surface 143c may be disposed on the side of the second locking protrusion 143b. A second inclined surface 143c that descends downward and faces the center of the second extension tab 143a may be disposed on the side of the second locking protrusion 143b. The second inclined surface 143c may guide the second locking protrusion 143b to pass through the second ledge 13b.

The second cut portion 143d extends to the other side of the second end 143 and may have a shape in which a portion of the second extension tab 143a is removed. In one embodiment, as shown in the drawing, the second cutting portion 143d may have an opening with a closed end. In another embodiment, although not shown in the drawings, the second cut portion 143d may have a slit shape with an open end. However, for convenience of explanation, the following description will focus on the second cutting portion 143d of the opening whose ends are closed.

The second cutting portion 143d may extend along the longitudinal direction of the second extension tab 143a. The second cutting portion 143d may extend a predetermined length along the center of the second extension tab 143a in the longitudinal direction. In the drawing, the second cutting portion 143d is shown extending along the longitudinal direction of the first extension tab 142a with a constant width, but this is not limited, and the width of the second cutting portion 143d may vary. . Additionally, in the drawing, the second cutting portion 143d shows a long hole shape, but it is not limited to this and may have various shapes.

The second cut portion 143d may extend to protrude from the outer peripheral surface of the first holder 130. A portion of the second cut portion 143d may be disposed radially outside the outer peripheral surface of the first holder 130. A second locking protrusion 143b may be disposed on the outside of the portion of the second cutting portion 143d. In addition, the other part of the second cut portion 143d is inserted into the guide portion 135 of the second holder 140, and thus may be disposed between the inner peripheral surface and the outer peripheral surface of the first holder 130.

The second cutting portion 143d may induce the second extension tab 143a to be deformed in the width direction. The second locking protrusion 143b is inserted into the second ledge 13b to fix the second holder 140. Since the second cutting portion 143d protrudes from the outer peripheral surface of the first holder 130 and is arranged parallel to the second locking protrusion 143b, the second cutting portion 143d has a second end 143 in the width direction. It can be deformed and stably inserted and fixed to the second ledge (13b).

The second bump 143e protrudes outward from the second extension tab 143a. The second bump 143e may contact the guide portion 135 of the first holder 130 to guide the movement of the second holder 140. When the second holder 140 descends, the second bump 143e moves along the guide portion 135 of the first holder 130. Since the second bump 143e maintains contact with the guide portion 135, shaking of the second holder 140 can be reduced and linear movement of the second holder 140 can be guided.

The second seating groove 143f is disposed at the lower part of the second stage 143, and the first sensor CS1 can be mounted thereon. The second seating groove 143f is formed to be recessed to a predetermined depth and can provide a space where the first sensor CS1 is fixed.

A portion of the second seating groove 143f may be disposed on the second extension tab 143a, and the other portion may be disposed on the second cutting portion 143d. The second seating groove 143f may be disposed at the end of the second end 143, and another portion may be disposed to overlap the second cutting portion 143d.

When the second holder 140 is lowered, the end of the second extension tab 143a is not deformed in the width direction, and thus the fixing force with the first sensor CS1 is maintained. Accordingly, even if the second holder 140 is lowered and mounted on the second ledge, the first sensor CS1 can stably maintain its fixed position in the second seating groove 143f.

The first end 142 and the second end 143 may have different heights. The first end 142 and the second end 143 may be arranged to be stepped around the second main body 141. The first end 142 extends to one side at the same height as the second main body 141, but the second end 143 may be placed at a higher position than the first end 142. The first end 142 and the second end 143 may be arranged to be stepped apart, and the first sensor CS1 may be placed below the second end 143.

The first end 142 and the second end 143 may be fixed to the third body 13 as the second holder 140 moves. When the elastic member 120 expands, the first end 142 may be fixed to the first ledge 13a, and the second end 143 may be fixed to the second ledge 13b.

The first sensor CS1 and the second sensor CS2 can sense the position of the holder unit HU. Hereinafter, the reference position is defined as the position before the needle (N) is inserted into the object or the position where the needle (N) is withdrawn from the cannula (C) and returned to its original position. The insertion position is defined as the position where the needle (N) is inserted into the object or the cannula (C) is inserted into the object.

The first sensor CS1 is disposed on one side of the holder unit HU and can sense whether the needle N is located at the insertion position, which is the position where the needle N is inserted into the object. The first sensor CS1 may sense whether the needle N is inserted into the object or the cannula C is inserted into the object.

The first sensor CS1 may be installed in the holder unit HU. The first sensor CS1 is placed on the second holder 140 and can move together with the cannula C. The first sensor CS1 may be disposed on the lower surface of the second end 143 of the second holder 140.

The first sensor CS1 may contact a connection part of the main control module 16. When the first holder 130 moves downward and the needle N is inserted into the object, or the second holder 140 moves downward, the first sensor CS1 is electrically connected to the connection part of the main control module 16. It can be connected to . When contact between the connection unit and the first sensor CS1 is confirmed, the main control module 16 may recognize that the first holder 130 is normally lowered and the cannula C is inserted into the object.

The second sensor CS2 is disposed on the other side of the holder unit HU and can sense whether the needle N is located at a reference position before the needle N is inserted into the object. The second sensor CS2 can sense whether the needle N is pulled out from the insertion position and positioned again at the reference position.

The second sensor CS2 may be installed in the holder unit HU. The second sensor CS2 is placed on the first holder 130 and can move together with the needle N. The second sensor CS2 may be disposed on the upper surface of the connection block 132 of the first holder 130.

The second sensor CS2 may contact the connection portion of the sub-control module 16S at the reference position. The sub-control module 16S is separated from the main control module 16, but can receive electrical signals. The sub-control module 16S may be mounted on the inner surface of the housing 11.

The second sensor CS2 comes into contact with the connection portion of the sub-control module 16S before the needle assembly 100 is driven or when the first holder 130 is pulled out from the insertion position and returned to the reference position.

In one embodiment, when contact between the connection part and the second sensor CS2 is confirmed, the sub-control module 16S may recognize that the first holder 130 is located at the reference position, and the needle N may be It can be confirmed that it was withdrawn from Nuller (C).

The first sensor CS1 and the second sensor CS2 may be sensors that generate a signal through contact, a sensor that measures a position, or a sensor that measures a force applied in a predetermined range.

In one embodiment, the first sensor CS1 and the second sensor CS2 may include a conductive material, and the connection portion of the main control module 16 and the connection portion of the sub-control module 16S may also include a conductive material. You can. As a result, the first sensor CS1 can generate a signal by contacting the connection part of the main control module 16, and the second sensor CS2 can generate a signal by contacting the connection part of the sub-control module 16S.

In another embodiment, the first sensor CS1 and the second sensor CS2, or the connection part of the main control module 16 and the connection part of the sub control module 16S may generate a signal when a predetermined force is applied. . A signal may be generated when a force exceeding a preset threshold is applied to at least one of the connection parts of the first sensor CS1 and the main control module 16. Additionally, a signal may be generated when a force exceeding a preset threshold is applied to at least one of the connection portions of the second sensor CS2 and the sub-control module 16S.

In another embodiment, the first sensor CS1 and the second sensor CS2 are sensors that measure distance. For example, the first sensor CS1 may measure the distance between the facing first sensor CS1 and the connection part of the main control module 16 and generate a signal based on the change in distance. The second sensor CS2 may measure the distance between the connecting portion of the second sensor CS2 and the sub-control module 16S facing each other and generate a signal based on the change in the distance. For example, the first sensor CS1 and the second sensor CS2 may be an infrared sensor or an ultrasonic sensor.

One end of the needle (N) is connected to the reservoir unit 200 so that the medicinal solution can be delivered, and the other end is inserted into the cannula and can move along the cannula. 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.

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 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) form a path through which fluid moves, so the chemical solution injected from the reservoir 210 can be injected into the user through the needle (N) and the cannula (C). .

The patch (P) is supported on the second body 14 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.

FIGS. 8 to 10 are cross-sectional views showing the driving operation of the needle assembly 100 of FIG. 5, and FIGS. 11 and 12 are cross-sectional views showing the operation of mounting the second holder 140 of FIG. 5.

8 to 12, the needle assembly 100 is driven as follows. In the needle assembly 100, when the sleeve 110 rotates, the elastic member 120 expands to move the first holder 130 and the second holder 140 to the insertion position, and the sleeve 110 moves further in the same direction. When rotated, the elastic member 120 contracts and only the first holder 130 returns to the reference position. Thus, the needle (N) and the cannula (C) are inserted together into the user's skin, and then the needle (N) is withdrawn from the cannula (C).

The needle assembly 100 is placed in its original position, that is, in the position before the user uses the needle assembly 100. The moving protrusion 115 of the sleeve 110 is supported by the first stop groove PT ₁ , and the elastic member 120 maintains a compressed state between the knob 111 and the first holder 130. The first holder 130 and the second holder 140 are disposed on the upper part of the needle assembly 100, so that the needle N and the cannula C are maintained inside the drug injection device 1.

At this time, the first sensor CS1 is placed in a position spaced apart from the connection part of the main control module 16, but the second sensor CS2 maintains contact with the connection part of the sub control module 16S. However, since the chemical injection device 10 is not driven, the second sensor CS2 may not generate an electrical signal even if it contacts the connection part of the sub-control module 16S.

When the user rotates the knob 111 in one direction and the sleeve 110 rotates in one direction with respect to the first holder 130, the moving protrusion 115 moves beyond the first stop groove PT1. Then, by expansion of the elastic member 120 in the axial direction, as shown in FIG. 6, the first holder 130 and the second holder 140 are directed downward, and the moving protrusion 115 is moved to the first wall ( You can maintain contact with PT2).

When the first holder 130 and the second holder 140 move downward, the needle N and the cannula C are inserted into the user's skin. Since the first holder 130 forces the second holder 140, the second holder 140 can pass through the first ledge 13a and the second ledge 13b. Since the second holder 140 is made of a flexible material, when the first holder 130 applies pressure to the second holder 140, the first end 142 passes through the first ledge 13a and the second end 140 passes through the first ledge 13a. 143 passes through the second ledge 13b.

The cutting portion is disposed on at least one of the first end 142 and the second end 143 of the second holder 140, so that the second holder 140 can be easily formed by forming the first ledge 13a and the second ledge 13b. ) can be installed. The cutting portion allows deformation of the first end 142 and the second end 143 in the width direction, so that the second holder 140 can be easily fixed in position.

Referring to FIG. 11, the first cut portion 142d disposed at the first end 142 allows the first extension tab 142a to be deformed in the width direction. When the first end 142 is inserted into the first ledge 13a, the first cutting portion 142d deforms the first extension tab 142a in the width direction, so that the distance between the first locking protrusions 142b increases. It decreases. The first locking protrusion 142b may pass through the first ledge 13a to fix the first end 142.

Referring to FIG. 12, the second cut portion 143d disposed at the second end 143 allows the second extension tab 143a to be deformed in the width direction. When the second end 143 is inserted into the second ledge 13b, the second cutting portion 143d deforms the second extension tab 143a in the width direction, so that the distance between the second locking protrusions 143b increases. It decreases. The second locking protrusion 143b may pass through the second ledge 13b to fix the second end 143.

When the second extension tab 143a is deformed and the second end is mounted on the second ledge 13b, the contact between the first sensor CS1 and the connection portion of the main control module 16 can be stably maintained. The first sensor CS1 can accurately measure whether the cannula C is inserted and whether the needle N is inserted.

At this time, the first sensor CS1 contacts the connection part of the main control module 16. Since the first ledge 13a and the second ledge 13b fix the position of the second holder 140, the first sensor CS1 can maintain stable contact with the main control module 16.

In one embodiment, an electrical signal may be generated when the connection portion of the first sensor CS1 and the main control module 16 contacts, and the main control module 16 moves the needle N forward through the electrical signal, It can be sensed that the cannula (C) is normally inserted into the object.

In another embodiment, even if the needle N moves forward and the cannula C is inserted into the object, the chemical injection device 10 is not electrically driven, so the main control module 16 does not generate an electrical signal. It may not be possible. Since the needle (N) is pulled out from the cannula (C) and the second sensor (CS2) is in contact with the sub-control module (16S), the drug injection device (10) is electrically driven, so that the first sensor (CS1) and the second sensor (CS2) are electrically driven. 2 The electrical signal generated by the sensor (CS2) can be processed.

When the user further rotates the knob 111 in one direction and the sleeve 110 rotates in one direction with respect to the first holder 130, the moving protrusion 115 moves along the guide groove 134. When the inclined wall 115a of the moving protrusion 115 moves along the inclined surface of the second wall PT3, the first holder 130 rises again and the elastic member 120 is compressed again.

The rise of the second holder 140 is limited by the first ledge 13a and the second ledge 13b. The first ledge (13a) supports the first end 142, and the second ledge (13b) supports the second end 143, so that even if the first holder 130 goes up and down, the second holder 140 Do not go up or down. As the first holder 130 rises, the needle (N) is withdrawn from the cannula (C).

At this time, the second sensor CS2 contacts the connection part of the sub-control module 16S. The first holder 130 returns to the reference position, and the second sensor CS2 makes contact with the connection part of the sub-control module 16S, thereby generating an electrical signal. Since the sub-control module 16S is electrically connected to the main control module 16, it can recognize that the needle N has been withdrawn through the generated electrical signal.

In one embodiment, if the first sensor (CS1) and the second sensor (CS2) simultaneously generate electrical signals, the control module controls the cannula (C) to be inserted into the object and the needle (N) to be inserted into the cannula (C). It can be recognized as being withdrawn from . The main control module 16 detects the needle N when the electrical signal generated by the first sensor CS1 and the electrical signal generated by the second sensor CS2 and transmitted from the sub-control module 16S are simultaneously measured. After being inserted into the object, it can be recognized as having retreated to the reference position.

In one embodiment, when an electrical signal is generated from the first sensor CS1 and the second sensor CS2, the control module may drive the driving module 300 to start liquid injection.

Referring again to FIG. 3, the reservoir unit 200 is mounted on the first body 13 and the third body 15 and is connected to the needle assembly 100. The reservoir unit 200 stores the chemical liquid (D) in the internal space of the reservoir 210, and can move the chemical liquid to the needle (N) in a fixed amount as the plunger moves.

The reservoir 210 extends to a preset length in the longitudinal direction and can store the chemical solution in the internal space. The reservoir 210 may discharge the chemical solution to the needle (N) by moving the plunger.

The inlet end of the reservoir 210 is connected to the lower part of the drug injection device 10, and the drug can be injected by the drug injector (NI). The inlet end may have a first connection opening 212 connected to the guide groove 211.

The outlet end of the reservoir 210 is disposed to be spaced apart from the inlet end, and is connected to the needle (N) so that the drug can be discharged. The outlet end may have a second connection opening 213 connected to the guide groove 211.

The guide groove 211 may be disposed on the inner surface of the reservoir 210. The guide groove 211 may be extended so that at least a portion of the section connects between the inlet end and the outlet end.

The guide groove 211 may form a path that guides the gas remaining in the internal space of the reservoir 210 to the needle assembly 100. Inside the reservoir 210, more specifically, in the gap between the front end of the reservoir 210 and the plunger, there is gas (air) remaining during the assembly or manufacturing process. When the drug is injected into the reservoir 210 through an external drug injector (NI), the gas may be discharged into the needle (N) along the guide groove (211).

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 inside the reservoir 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 of the drive unit 400, and the rod moves linearly due to the rotation of the drive wheel, causing the plunger to move. You 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.

The battery 350 can supply electricity to the chemical injection device 10 to activate each component. In the drawing, a pair of batteries 350 is shown, but the battery 350 is not limited thereto, and may be set in various ways depending on the capacity, usage range, usage time, etc. of the chemical injection device 10.

The battery 350 is disposed adjacent to the driving unit 400 and can supply electricity to the driving unit 400. In addition, the battery 350 is connected to the main control module 16, and based on the electrical signal measured by the sensor unit, the rotation speed or rotation speed of the driving unit 400, the amount of chemical liquid stored in the reservoir 210, and the user Data on the amount of medication injected into the patient can be measured.

The driving unit 400 is installed between the driving module 300 and the reservoir unit 200 and can move the plunger disposed in the reservoir 210 using the driving force generated by the driving module 300.

The trigger member 600 may generate a mechanical signal that causes the chemical solution of the chemical solution injection device 10 to be injected. The trigger member 600 is rotatably disposed on one side of the third body 15. The trigger member 600 rotates to start driving the drive module 300, and at the same time, the clutch unit operates the drive unit 400. Can be connected to drive.

FIG. 13 is an exploded perspective view showing the needle cover assembly 700 of FIG. 3.

4 and 13, the needle cover assembly 700 may be mounted below the needle assembly 100. The needle cover assembly 700 can prime the air stored in the reservoir unit 200 before injecting the chemical solution. When the chemical liquid enters the reservoir 210 through the chemical liquid injector (NI), the gas (air) remaining in the reservoir 210 can be discharged to the outside.

The needle cover assembly 700 may have a first cover 710, a second cover 720, a filter member 730, and an adhesive layer 740.

The first cover 710 may be placed below the chemical injection device 10. The second cover 720 may be inserted into the opening of the first cover 710 and assembled.

The first cover 710 may have an insertion protrusion 711 protruding from the first block 710a. The insertion protrusion 711 may be inserted into the insertion groove 14 of the second body 14 to fix the needle cover assembly 700 to the base body.

The first cover 710 may have an insertion groove 713 into which the second cover 720 is inserted, and may be provided with a duct 712 disposed in the center of the insertion groove 713. Additionally, a plurality of fixing grooves 714 into which the fixing protrusion 722 of the second cover 720 is inserted may be disposed in the insertion groove 713.

The second cover 720 is assembled to the first cover 710, and the needle (N) and/or cannula (C) may be aligned at the center. The second cover 720 is penetrated in the center in the height direction and may have a storage space in which the chemical solution (D) is stored.

The first cover 710 has greater rigidity than the second cover 720. The first cover 710 is a part exposed to the outside and is made of a material with somewhat high rigidity. The second cover 720 is assembled to the first cover 710 and is made of a material with less rigidity than the first cover 710 in order to be inserted into the opening of the second body 14.

A protrusion 721 inserted into the second body 14 may be provided at the center of the second block 720a of the second cover 720. The protrusion 721 may have an extended end 721a whose end extends outward in the radial direction. The extension end 721a is inserted into the second body 14 so that the second cover 720 can be fixed to the lower part of the chemical injection device 10. Since the protrusion 721 and the extended end 721a have a certain flexibility, they can be inserted into the second body 14 with an interference fit.

The second cover 720 has a fixing protrusion 722, and the fixing protrusion 722 is inserted into the first cover 710, so that the first cover 710 and the second cover 720 can be assembled. .

The protrusion 721 of the second cover 720 is inserted into the opening at the bottom of the second body 14. The diameter G2 of the protrusion 721 is set to be slightly larger than the diameter G1 of the opening. Since the second cover 720 has a certain amount of elasticity, the protrusion 721 can be inserted into the opening and fixed thereto.

The second cover 720 has an inner diameter (G3), so that the needle (N) and the cannula (C) can be aligned at the top. The inner diameter G3 forms a storage space of the second cover 720, where chemical liquid can be stored or gas can be moved and discharged. The duct 712 of the first cover 710 also has an inner diameter G3, so that a chemical solution can be stored in the inner space of the duct 712, or gas can be moved and discharged.

The filter member 730 is mounted on the second cover 720. The filter member 730 is disposed below the storage space of the second cover 720, and gases such as air pass through the filter member 730, but liquids such as chemicals do not pass through the filter member 730. Thus, the air discharged from the needle N passes through the filter member 730 and is discharged to the outside, but the chemical liquid discharged from the needle will be stored in the storage space defined by the second cover 720 and the filter member 730. You can.

The shape of the filter member 730 may change depending on the amount of chemical solution stored in the storage space. For example, when the storage space is filled with a chemical solution, the filter member 730 expands downward, allowing the user to recognize that the chemical solution has entered the needle cover assembly 700.

The adhesive layer 740 is disposed on one surface of the needle cover assembly 700, and the needle cover assembly 700 can be attached to the attachment portion 12.

The alarm unit 800 is disposed inside or outside the chemical injection device 10 and can notify the user of normal operation or malfunction of the chemical injection device 10.

As an example, the alarm unit 800 is disposed below the housing 11 and connected to a circuit board. The alarm unit 800 may generate a warning sound or light to deliver an alarm to an external user.

In the needle assembly 100 and the drug injection device 10 according to the present invention, the cannula (C) can be stably inserted and fixed to the object. When the first holder 130 moves downward, the second holder 140 also moves downward and the cannula (C) and needle (N) are inserted into the object, and then the second holder 140 Since the position of is fixed, the drug can be stably injected into the subject.

In the needle assembly 100 and the drug injection device 10 according to the present invention, the cannula (C) can be simply inserted into the subject. The second holder 140 has a first end 142 and a second end 143 extending on both sides, and at least one of the first end 142 and the second end 143 is partially removed, so that 2 Deformation of the holder 140 may be permitted. When the second holder 140 passes through the ledge, the cutting portion allows deformation in the width direction of the first end 142 and the second end 143, so the second holder 140 simply passes through the ledge, The position can be fixed by the ledge.

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 claims, are within the scope of the spirit of the present invention. It will be said that it belongs.

1: Chemical injection system
10: Chemical injection device
100: Needle assembly
200: reservoir unit
300: drive module
400: drive unit
600: Trigger absence
700: Needle cover assembly
800: Alarm unit

Claims (12)

You guys;
a cannula into which the needle is inserted;
a first holder supporting the needle;
a sleeve on which the first holder is disposed in an internal space; and
A second holder supports the cannula and is disposed to face one side of the first holder, and has a first end and a second end extending outward,
At least one of the first stage and the second stage is
The end extends to protrude from the outer peripheral surface of the first holder, and has a cut portion removed to a preset length,
The resection section
A needle assembly, where a part is disposed radially outside the outer peripheral surface of the first holder, and the other part is disposed between the inner peripheral surface and the outer peripheral surface of the first holder. delete delete According to claim 1,
The first end extends to one side and has a first cutting portion having an open end and a slit shape. According to clause 4,
The second end extends to the other side, and has a second cutting portion that has a closed opening at the end when extended in the longitudinal direction. According to claim 1,
The second holder is
A needle assembly wherein the second end is disposed at a higher position than the first end, and a sensor is disposed at an end of the second end. base body;
a housing disposed on an upper portion of the base body;
a sleeve mounted on the base body and the housing;
a first holder inserted into the inner space of the sleeve and supporting the needle;
A second holder supports the cannula into which the needle is inserted and is disposed to face one side of the first holder, and has a first end and a second end extending outward,
At least one of the first stage and the second stage is
The end extends to protrude from the outer peripheral surface of the first holder, and has a cut portion removed to a preset length,
The resection section
A chemical injection device, wherein a portion is disposed radially outside the outer peripheral surface of the first holder, and the other portion is disposed between the inner peripheral surface and the outer peripheral surface of the first holder. delete According to clause 7,
At least one of the first end and the second end has a locking protrusion protruding from the outside of the cutting part,
The base body has a ledge that supports the locking protrusion when the second holder descends. According to clause 7,
The first end extends to one side and has a first cutting portion having a slit shape with an open end. According to claim 10,
The second end extends to the other side, and has a second cutting portion that extends in the longitudinal direction and has a closed opening at the end. According to clause 7,
In the second holder, the second end is disposed at a higher position than the first end, and a sensor is disposed at an end of the second end,
The sensor is in contact with one side of the base body when the second holder is lowered.

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