KR20220036799A - Needle assembly and drug injection device comprising the same - Google Patents

Abstract

Provided are: a needle assembly; and a medicinal fluid injection device comprising the same. The needle assembly according to the present invention comprises: a needle; a cannula into which the needle is inserted; a first holder supporting the needle; a sleeve in which a first holder is disposed in an inner space thereof; and a second holder that is configured to support the cannula, disposed to face one side of the first holder, and provided with a first end and a second end extending outward, wherein at least one among the first end and the second end has a cutout portion in which a part is removed by a predetermined length.

Description

Needle assembly and drug injection device comprising the same

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

In general, a drug injection device such as an insulin injection device is used to inject a drug into a patient's body. Although such a drug injection device is sometimes used by professional medical staff such as doctors or nurses, in most cases, it is used by ordinary people such as patients themselves or their guardians. Diabetic patients, especially pediatric diabetic patients, need to inject drugs such as insulin into the body at regular intervals. Therefore, a drug injection device in the form of a patch used by attaching to the human body for a certain period of time has been developed. Such a drug injection device may be used in a state of being attached in the form of a patch to a human body such as the abdomen or waist of a patient for a certain period of time.

When attached to the human body, the chemical injection device needs to be comfortable to wear, easy to use, durable, and operated with low power. In particular, since the drug injection device is used by being attached to the patient's skin, the user must simply and conveniently insert a needle or a cannula into the patient's skin.

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

One aspect of the present invention is a needle, a cannula into which the needle is inserted, a first holder for supporting the needle, a sleeve in which the first holder is disposed in an inner space, and a sleeve for supporting the cannula and the first holder and a second holder disposed to face one side of the side and having a first end and a second end extending outward, wherein at least one of the first end and the second end includes an excision part in which a part is removed to a preset length Branch provides a needle assembly.

In addition, at least one of the first end and the second end may extend such that an end protrudes from the outer circumferential surface of the first holder, and a part of the cut portion may be disposed radially outside the outer circumferential surface of the first holder. .

In addition, another portion of the cutout may be disposed between the inner circumferential surface and the outer circumferential surface of the first holder.

Also, the first end may have a first cut-out portion extending to one side and having a slit shape with an open end.

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

Also, in the second holder, the second end may be disposed at a higher position than the first end, and a sensor may be disposed at an end of the second end.

Another aspect of the present invention includes a base body, a housing disposed on 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 supporting the cannula into which the needle is inserted and disposed to face one side of the first holder, the second holder having a first end and a second end extending outward, the first end and the second end At least one of the stages provides a medicament injection device having an excision part partially removed to a predetermined length.

In addition, at least one of the first end and the second end may extend such that an end protrudes from the outer circumferential surface of the first holder, and a part of the cut portion may be disposed radially outside the outer circumferential surface of the first holder. .

In addition, at least one of the first end and the second end may include a locking protrusion protruding from the outside of the cutout, and the base body may have a ledge for supporting the locking protrusion when the second holder descends. .

Also, the first end may have a first cut-out portion extending to one side and having a slit shape with an open end.

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

In addition, in the second holder, the second end is disposed at a higher position than the first end, and a sensor is disposed at the end of the second end, and when the second holder is lowered, the sensor of the base body One side can be in contact.

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

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

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

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility that one or more other features or components will be added is not excluded in advance.

In cases where certain embodiments may be implemented otherwise, a specific process sequence may be performed different from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the following embodiment is not necessarily limited to the illustrated bar.

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

Referring to FIG. 1 , the chemical injection system 1 may include a chemical injection device 10 , a user terminal 20 , a controller 30 , and a biometric information sensor 40 . In the chemical injection system 1 , a user can drive and control the system using the user terminal 20 , and based on blood glucose information monitored by the biometric information sensor 40 , the medicinal solution is injected from the chemical injection device 10 . It can be injected periodically.

The drug injection device 10 injects drugs to be injected to the user, such as insulin, glucagon, anesthetic, analgesic, dopamine, growth hormone, smoking cessation aid, etc., based on the data sensed by the biometric information sensor 40 It also performs functions.

In addition, the chemical injection device 10 may transmit a device status message including information on the remaining battery capacity of the device, whether the device is booted successfully, whether the injection is successful or the like, to the controller 30 . Messages transmitted to the controller may be transmitted to the user terminal 20 via the controller 30 . Alternatively, the controller 30 may transmit improved data processed by processing the received messages to the user terminal 20 .

In one embodiment, the drug 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. Also, in another embodiment, the drug injection device 10 may be mounted on an animal to inject the drug solution.

The user terminal 20 may receive an input signal from a user in order to drive and control the drug injection system 1 . The user terminal 20 may generate a signal for driving the controller 30 to control the controller 30 to drive the chemical injection device 10 . In addition, the user terminal 20 may display biometric information measured from the biometric information sensor 40 , and may display status information of the drug injection device 10 .

The user terminal 20 refers to a communication terminal that can be used in a wired/wireless communication environment. For example, the user terminal 20 may include 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 terminal for digital broadcasting, a navigation system, a kiosk, an MP3 player, a digital camera, a home appliance, a device equipped with a camera, and other mobile or non-mobile computing devices. In addition, the user terminal 2 may be a wearable device such as a watch, glasses, a hair band and a ring having a communication function and a data processing function. However, as described above, a terminal equipped with an application capable of Internet communication may be borrowed without limitation.

The user terminal 20 may 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 an embodiment, the user terminal 20 and the controller 30 may be separated from each other and provided as separate devices. For example, the controller 30 may be provided to the subject equipped with the drug 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 increasing 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 user terminal 20 and the controller 30 provided as one may communicate with the drug solution injection device 10 to control the drug injection.

The controller 30 performs a function of transmitting and receiving data to and from the drug solution injection device 10 , transmits a control signal related to injection of a drug such as insulin to the drug solution injection device 10 , and receives blood sugar from the biometric information sensor 40 . It is possible to receive a control signal related to the measurement of a biological value, such as.

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

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

For example, the biometric information sensor 40 may be a sensor that measures the blood glucose level of the object. It may be a continuous glucose monitoring (CGM) sensor. The continuous blood glucose measurement sensor may be attached to the object to continuously monitor the blood glucose level.

The user terminal 20 , the controller 30 and the drug injection device 10 may perform communication using a network. For example, a network includes a local area network (LAN), a wide area network (WAN), a value added network (VAN), a mobile radio communication network, a satellite communication network, and their It is a data communication network in a comprehensive sense that includes a mutual combination and enables each network constituent entity to communicate smoothly with each other, and may include a wired Internet, a wireless Internet, and a mobile wireless communication network. In addition, wireless communication is, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy, Zigbee, WFD (Wi-Fi Direct), UWB (ultra wideband), infrared communication (IrDA, infrared Data Association), NFC (Near Field Communication), 5G, etc. may be there, but is not limited thereto.

2 is a perspective view illustrating the 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. It is a cross-section taken.

2 to 4 , the chemical injection device 10 is attached to a user to inject a chemical solution, and may inject a chemical solution stored therein in a predetermined amount to the user.

The chemical liquid injection device 10 may be used for various purposes according to the type of the chemical liquid to be injected. For example, the drug may include an insulin-based drug for diabetic patients, and may include other drugs for the pancreas, a drug for the heart, and other various kinds of drugs.

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

In the chemical injection device 10 , the base body may form 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 under the housing 11, and the needle assembly 100, the reservoir unit 200, the driving module 300, the battery 350, etc. can be supported in each opening or groove. there is. The second body 14 is disposed under the first body 13 and may be connected to the attachment part 12 . The second body 14 may cover a 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 , the driving module 300 , the battery 350 , the driving unit 400 , and the like in each opening or groove. can be In the drawings, the first body 13 , the second body 14 , and the third body 15 are illustrated, but the present invention is not limited thereto and may be provided integrally or in plurality.

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

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

3 to 6 , in the drug injection device 10 , the user simply rotates the needle assembly 100 , inserts a cannula into the subject, and initiates drug injection.

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

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

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

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

The elastic member 120 and the first holder 130 and the second holder 140 serving as the holder unit HU may be disposed in the inner 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 circumferential surface of the first holder 130 . When the rotating body 112 rotates, the moving protrusion 115 moves along the sidewalls of the guide groove 134 so that the first holder 130 may be raised or lowered.

Referring to FIG. 8 , the moving protrusion 115 may include an inclined wall 115a and a vertical wall 115b. The inclined wall 115a induces a 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 . 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 may 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 made of various members that transmit elastic force in the longitudinal direction. However, hereinafter, for convenience of explanation, the case in which the elastic member 120 is in the form of a spring will be mainly described.

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

The first holder 130 may support the needle (N). Since the needle (N) is inserted and fixed to one side of the first holder (130), when the first holder (130) moves in the axial direction, the needle (N) also moves. The first holder 130 is disposed in the inner space of the sleeve 110, the elastic member 120 is disposed on the upper portion.

The first holder 130 may 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 may extend from one side of the first main body 131 and 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. The reinforcing end 132a has a needle (N) inserted therein, and the position of the needle (N) may be fixed. The second end 143 of the second holder 140 may be supported under the reinforcing end 132a. When the elastic member 120 expands, the reinforcing end 132a moves downward and the second end 143 is applied to the second holder 140 to be fixed to the second ledge 13b.

The extended end 132b is connected to the reinforcing 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 on the upper end 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 at at least one of the reinforcing end 132a and the extended end 132b. The slit 132c may increase the flexibility of the connection block 132 . In particular, the slit 132c increases the flexibility of the extension end 132b so that the second sensor CS2 can constantly maintain contact with the connection portion of the sub control module 16S.

Referring to FIG. 8 , the first holder 130 may include a guide groove 134 on an outer surface thereof. 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 may 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 in which the moving protrusion 115 is initially located, wherein the elastic member 120 maintains a contracted state.

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 may descend, 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 inclination. 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 may return to the reference position again. At this time, the elastic member 120 maintains the contracted state again.

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

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

The second holder 140 is disposed 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 predetermined rigidity. The second holder 140 may be deformed by the first cut-out portion 142d and the second cut-out 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 The locking protrusion 143b may be inserted into the second ledge 13b.

In another embodiment, the second holder 140 may be formed of a flexible material, and may be instantaneously deformed in shape when an external force is applied. The second holder 140 may have increased flexibility by the first cut-out portion 142d and the second cut-out portion 143d.

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

The cannula (C) is inserted into the center of the second main body (141), the needle (N) may be selectively coupled. A center 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 disposed to face the cannula (C), the needle (N) passing through the central hole (141CH) may be inserted into the cannula (C).

The lower surface of the second main body 141 may have a first seating groove in 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 outside the second main body 141 . The alignment protrusion 141a may be disposed to be in contact with the inner circumferential surface of the first holder 130 to align the second holder 140 to the inside of the first holder 130 .

In the second holder 140 , the alignment protrusion 141a contacts the first holder 130 , thereby reducing shaking of the first holder 130 and the second holder 140 . In addition, only the alignment protrusion 141a contacts the inner circumferential surface of the first holder 130 to reduce frictional force. By reducing the contact area between the first holder 130 and the second holder 140 , the frictional force between the first holder 130 and the second holder 140 can be reduced, and the second holder 140 is the first It can be simply separated from the holder 130 .

The second holder 140 has a first end 142 and a second end 143 extending outwardly, at least one of the first end 142 and the second end 143 has a predetermined length. It may have an excision removed with

At least one of the first end 142 and the second end 143 has an end extending to protrude from the outer circumferential surface of the first holder 130 , and a portion of the cut-out portion is radially outside the outer circumferential surface of the first holder 130 . can be placed in In addition, another portion of the cut portion may be disposed between the inner peripheral surface and the outer peripheral surface of the first holder 130 .

In an embodiment, cut-out portions may be disposed on both the first holder 130 and the second holder 140 of the second holder 140 . In another embodiment, in the second holder 140 , a cutout may be disposed on the first holder 130 or the second holder 140 . However, hereinafter, for convenience of description, the embodiment in which both the first holder 130 and the second holder 140 are provided with cutouts will be mainly described.

The first end 142 may protrude outward from the second main body 141 and may be formed to be flexible. At least a portion of the first end 142 may be 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 cut-out 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 may extend in a radial direction so that a part of the first main body 131 of the first holder 130 may be inserted into the excised guide part 135 . The width of the guide part 135 of the first holder 130 may be set to be larger than the width of the first extension tab 142a. The guide part 135 is in contact with the first bump 142e protruding outward of the first extension tab 142a.

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

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

The first cut-out portion 142d may extend 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 cut portion 142d may have a slit shape with an open end. In another embodiment, although not shown in the drawings, the first cut-out portion 142d may have an opening shape with a closed end. However, hereinafter, for convenience of description, the slit-shaped first cut-out portion 142d with an open end will be mainly described.

The first cut-out portion 142d may extend along the longitudinal direction of the first extension tab 142a. The first cut-out portion 142d may extend along the longitudinal center of the first extension tab 142a to the end of the first extension tab 142a. Although the drawings illustrate that the first cut-out portion 142d extends along the longitudinal direction of the first extension tab 142a with a constant width, the present invention is not limited thereto, and the width of the first cut-out portion 142d may vary. .

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

The first cut-out portion 142d may induce deformation of the first extension tab 142a 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 cut-out 142d protrudes from the outer circumferential surface of the first holder 130 and is disposed in parallel with the first locking protrusion 142b, the first cut-out 142d has the first end 142 in the width direction. can be deformed to be 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 135 of the first holder 130 to guide the movement of the second holder 140 . When the second holder 140 descends, the first bump 142e moves along the guide 135 of the first holder 130 . Since the first bump 142e maintains contact with the guide part 135 , shaking of the second holder 140 may be reduced and linear movement of the second holder 140 may be guided.

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

The second extension tab 143a extends outward from the second main body 141 . Referring to FIG. 6 , the second extension tab 143a may extend in a radial direction so that a part of the first main body 131 of the first holder 130 may be inserted into the excised guide 135 . The width of the guide part 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 is in contact with the second bump 143e protruding outward of the second extension tab 143a.

A part of the second extension tab 143a may be inserted into the cut-out portion of the rotation 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 when the sleeve 110 rotates.

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

The second cut-out portion 143d may extend 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 cut-out portion 143d may have an opening with a closed end. In another embodiment, although not shown in the drawings, the second cut-out portion 143d may have a slit shape with an open end. However, hereinafter, for convenience of description, the second cut-out portion 143d of the opening with the end closed will be mainly described.

The second cut-out portion 143d may extend along the longitudinal direction of the second extension tab 143a. The second cut-out portion 143d may extend a predetermined length along the longitudinal center of the second extension tab 143a. Although the drawing shows that the second cut-out portion 143d extends along the longitudinal direction of the first extension tab 142a with a constant width, the present invention is not limited thereto, and the width of the second cut-out portion 143d may vary. . In addition, although the second cut-out portion 143d has a long hole shape in the drawings, it is not limited thereto and may have various shapes.

The second cut-out portion 143d may extend to protrude from the outer circumferential surface of the first holder 130 . A portion of the second cut-out portion 143d may be disposed radially outward from the outer circumferential surface of the first holder 130 . A second locking protrusion 143b may be disposed on the outside of the portion of the second cut-out portion 143d. In addition, since another portion of the second cut-out portion 143d is inserted into the guide portion 135 of the second holder 140 , it may be disposed between the inner peripheral surface and the outer peripheral surface of the first holder 130 .

The second cut-out 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 cut-out portion 143d protrudes from the outer circumferential surface of the first holder 130 and is disposed in parallel with the second locking protrusion 143b, the second cut-out portion 143d has the second end 143 in the width direction. can be deformed to be 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 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 135 of the first holder 130 . Since the second bump 143e maintains contact with the guide part 135 , shaking of the second holder 140 may be reduced and linear movement of the second holder 140 may be guided.

The second seating groove 143f is disposed under the second end 143 , and the first sensor CS1 may be mounted thereon. The second seating groove 143f is formed to be recessed to a predetermined depth, and may provide a space in which the first sensor CS1 is fixed.

A portion of the second seating groove 143f may be disposed on the second extension tab 143a, and another portion may be disposed on the second cutout portion 143d. The second seating groove 143f may be disposed at the end of the second end 143 so that another portion thereof overlaps the second cutout portion 143d.

When the second holder 140 descends, the end of the second extension tab 143a does not deform in the width direction, so that the fixing force with the first sensor CS1 is maintained. Accordingly, even when the second holder 140 descends and is mounted on the second ledge, the first sensor CS1 may stably maintain a 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 disposed to have a step difference with respect to 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 disposed at a higher position than the first end 142 . The first end 142 and the second end 143 may be disposed to have a step difference, and the first sensor CS1 may be disposed under the second end 143 .

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

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

The first sensor CS1 may be disposed on one side of the holder unit HU, and may sense whether the needle N is positioned at an insertion position that is a 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 disposed on the second holder 140 and can move together with the cannula C. The first sensor CS1 may be disposed on a lower surface of the second end 143 of the second holder 140 .

The first sensor CS1 may be in contact with 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 . can be connected to When the contact between the connection part and the first sensor CS1 is confirmed, the main control module 16 may recognize that the first holder 130 is normally descended 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 may sense whether the needle N is positioned at a reference position before the needle N is inserted into the object. The second sensor CS2 may sense whether the needle N is withdrawn from the insertion position and is again located at the reference position.

The second sensor CS2 may be installed in the holder unit HU. The second sensor CS2 is disposed on the first holder 130 to 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 be in contact with the connection part of the sub control module 16S at the reference position. The sub control module 16S is spaced apart from the main control module 16, but may receive an electrical signal. 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 part of the sub control module 16S before the needle assembly 100 is driven or when the first holder 130 is withdrawn from the insertion position and returned to the reference position.

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

The first sensor CS1 and the second sensor CS2 may be provided as sensors that generate a signal through contact, measure a position, or measure 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 part of the main control module 16 and the connection part of the sub control module 16S may also include a conductive material. can Accordingly, the first sensor CS1 may contact the connection part of the main control module 16 to generate a signal, and the second sensor CS2 may contact the connection part of the sub control module 16S to generate a signal.

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. . 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 , a signal may be generated. In addition, when a force exceeding a preset threshold is applied to at least one of the connection parts of the second sensor CS2 and the sub control module 16S, a signal may be generated.

In another embodiment, the first sensor CS1 and the second sensor CS2 include a sensor for measuring a distance. For example, the first sensor CS1 may measure a distance between the first sensor CS1 facing each other and a connection part of the main control module 16 , and may generate a signal based on a change in the distance. The second sensor CS2 may measure a distance between the second sensor CS2 facing each other and a connection part of the sub control module 16S, and generate a signal based on a 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) may be connected to the reservoir unit 200 to deliver the drug, and the other end may be inserted into the cannula to move along the cannula. Since the needle (N) is fixed to the first holder (130), it can be inserted into or released from the cannula (C) by the axial movement of the first holder (130).

Since the cannula C is fixed to the second holder 140 , it may be inserted into the user's skin by the axial movement of the second holder 140 . Since the cannula (C) has a conduit shape that can accommodate the needle (N), the drug solution discharged from the needle (N) can be injected to the user. The 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 the fluid moves, and the chemical solution injected from the reservoir 210 may be injected to the user through the needle (N) and the cannula (C). .

The patch (P) is supported on the second body (14), it is possible to fix the position of the cannula (C). Since the end of the cannula (C) is supported on the patch (P), it is possible to prevent the cannula (C) from being separated during storage or movement.

8 to 10 are cross-sectional views illustrating a driving operation of the needle assembly 100 of FIG. 5 , and FIGS. 11 and 12 are cross-sectional views illustrating an operation in which the second holder 140 of FIG. 5 is mounted.

8 to 12, the driving of the needle assembly 100 is performed 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 is further moved 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 into the user's skin together, and then the needle (N) is withdrawn from the cannula (C).

The needle assembly 100 is in its original position, that is, it is in a state disposed at 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 needle assembly 100, the needle (N) and the cannula (C) is maintained inside the drug injection device (1).

In this case, the first sensor CS1 is disposed at 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 it is before the chemical injection device 10 is driven, an electrical signal may not be generated even when the second sensor CS2 comes into contact with 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, as shown in FIG. 6 by the expansion in the axial direction of the elastic member 120, the first holder 130 and the second holder 140 are directed downward, and the moving protrusion 115 is the first wall ( PT2) can be maintained.

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 applies the second holder 140 , the second holder 140 may pass through the first ledge 13a and the second ledge 13b . Since the second holder 140 is formed of a flexible material, when the first holder 130 applies the second holder 140, the first end 142 passes through the first ledge 13a, and the second end 143 passes through the second ledge 13b.

A cutout 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 is simply the first ledge 13a and the second ledge 13b. ) can be installed. The cut portion allows deformation in the width direction of the first end 142 and the second end 143 , so that the position of the second holder 140 can be simply fixed.

Referring to FIG. 11 , the first cut-out portion 142d disposed on the first end 142 allows deformation of the first extension tab 142a in the width direction. When the first end 142 is inserted into the first ledge 13a, the first cut-out portion 142d deforms the first extension tab 142a in the width direction so that the distance between the first locking protrusions 142b is increased. decreases The first locking protrusion 142b may pass through the first ledge 13a and the first end 142 may be fixed.

12 , the second cut-out portion 143d disposed on the second end 143 allows deformation of the second extension tab 143a in the width direction. When the second end 143 is inserted into the second ledge 13b, the second cut-out portion 143d deforms the second extension tab 143a in the width direction so that the distance between the second locking protrusions 143b is increased. decreases The second locking protrusion 143b may pass through the second ledge 13b and the second end 143 may be fixed.

When the second extension tab 143a is deformed and the second end is mounted on the second ledge 13b, contact between the first sensor CS1 and the connection portion of the main control module 16 may be stably maintained. It is possible to accurately measure whether the insertion of the cannula (C) and the insertion of the needle (N) in the first sensor (CS1).

At this time, the first sensor CS1 is in contact with 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 may stably maintain contact with the main control module 16 .

In one embodiment, when the connection part of the first sensor CS1 and the main control module 16 comes into contact, an electrical signal may be generated, and the main control module 16 advances the needle N through the electrical signal, It can sense that the cannula (C) is normally inserted into the object.

In another embodiment, even if the needle (N) advances and the cannula (C) is inserted into the object, the electrical driving of the drug injection device 10 does not proceed, so the main control module 16 does not generate an electrical signal it may not be When the needle N is withdrawn from the cannula C and the second sensor CS2 comes into contact with the sub control module 16S, the chemical liquid injection device 10 is electrically driven, so the first sensor CS1 and the second sensor CS1 2 It is possible to process an electrical signal generated by the sensor CS2.

When the user further rotates the knob 111 in one direction so that 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 when the first holder 130 is raised and lowered, the second holder 140 is do not ascend As the first holder 130 rises, the needle (N) is withdrawn from the cannula (C).

At this time, the second sensor CS2 is in contact with the connection part of the sub control module 16S. When the first holder 130 returns to the reference position again, the second sensor CS2 comes into contact with the connection part of the sub control module 16S to generate an electrical signal. Since the sub control module 16S is electrically connected to the main control module 16, it can be recognized that the needle N is drawn out through the generated electrical signal.

In one embodiment, if the first sensor (CS1) and the second sensor (CS2) simultaneously generate an electrical signal, the control module, the cannula (C) is inserted into the object, the needle (N) is the cannula (C) can be recognized as derived from 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 in the main control module 16, the needle N is After being inserted into the object, it may be recognized as being retracted to the reference position.

In an embodiment, when electrical signals are generated from the first sensor CS1 and the second sensor CS2 , the control module drives the driving module 300 to start injecting the liquid.

Referring back 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 solution D in the internal space of the reservoir 210 , and may move the chemical solution to the needle N in a fixed amount according to the movement of the plunger.

The reservoir 210 may be extended to a predetermined length in the longitudinal direction, and may store the chemical solution in the internal space. Reservoir 210 may be discharged to the needle (N) by the movement of the plunger.

The inlet end of the reservoir 210 is connected to the lower portion of the drug injection device 10 , and the drug may 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 may be discharged. The exit 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 extend so that at least some sections are connected between the inlet end and the outlet end.

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

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

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 linearly moves with the rotation of the drive wheel so that the plunger can move

As the driving module 300 , all kinds of devices having a chemical liquid suction power and a chemical liquid discharge power can be used by electricity. For example, all kinds of pumps such as mechanical displacement type micropumps and electromagnetic motion type micropumps can be used. A mechanical displacement micropump is a pump that uses the motion of a solid or fluid, such as a gear or diagram, to generate a pressure difference to induce the flow of a fluid. Diaphragm displacement pump, fluid displacement pump ), and a rotary pump. Electromagnetic motion micropumps are pumps that directly use electrical or magnetic energy to move a fluid. Electrohydrodynamic pumps (EHD), electroosmotic pumps, magnetohydrodynamic pumps ( Magneto hydrodynamic pump) and electrowetting pump.

The battery 350 may supply electricity to the chemical injection device 10 to activate each component. Although the drawing shows a pair of batteries 350 , the present invention is not limited thereto, and may be set in various ways according to the capacity, use range, use time, etc. of the chemical injection device 10 .

The battery 350 is disposed adjacent to the driving unit 400 and may supply electricity to the driving unit 400 . In addition, the battery 350 is connected to the main control module 16, the number of rotations or rotational speed of the driving unit 400 based on the electrical signal measured by the sensor unit, the amount of chemical stored in the reservoir 210, the user It is possible to measure data on the amount of drug injected into the patient.

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

The trigger member 600 may generate a mechanical signal into which the chemical of the chemical injection device 10 is injected. The trigger member 600 is rotatably disposed on one side of the third body 15 , and the trigger member 600 rotates to start driving the driving module 300 , and at the same time, the clutch unit drives the driving unit 400 . drive connection is possible.

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

4 and 13 , the needle cover assembly 700 may be mounted under the needle assembly 100 . The needle cover assembly 700 may 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 injector NI, the gas (air) remaining in the reservoir 210 may be discharged to the outside.

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

The first cover 710 may be disposed under the chemical injection device 10 . The second cover 720 may be inserted into the opening of the first cover 710 to be assembled.

The first cover 710 may include 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 include a duct 712 disposed in the center of the insertion groove 713 . In addition, a plurality of fixing grooves 714 into which the fixing protrusions 722 of the second cover 720 are 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 the cannula (C) may be aligned in 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 portion exposed to the outside, and is formed of a material having a rather high rigidity. The second cover 720 is assembled to the first cover 710 , and is formed of a material having 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 a center of the second block 720a of the second cover 720 . The protrusion 721 may have an extended end 721a having an end extending outward in a radial direction. The extended end 721a may be inserted into the second body 14 so that the second cover 720 may be fixed to the lower portion of the medicament injection device 10 . Since the protrusion 721 and the extended end 721a have predetermined flexibility, they may be inserted into the second body 14 by force fitting.

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 of the lower end 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 predetermined elasticity, the protrusion 721 may be inserted into the opening to be fixed.

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

The filter member 730 is mounted on the second cover 720 . The filter member 730 is disposed under the storage space of the second cover 720 , and a gas such as air passes through the filter member 730 , but a liquid such as a chemical does 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 solution discharged from the needle is stored in a storage space defined by the second cover 720 and the filter member 730. can

The filter member 730 may change in shape depending on the amount of the chemical stored in the storage space. For example, when the chemical solution is filled in the storage space, the filter member 730 expands downward, so that the user can recognize that the chemical solution is introduced into the needle cover assembly 700 .

The adhesive layer 740 is disposed on one surface of the needle cover assembly 700 , and may attach the needle cover assembly 700 to the attachment part 12 .

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

For example, the alarm unit 800 is disposed under the housing 11 and is connected to a circuit board. The alarm unit 800 may transmit an alarm to an external user by generating a warning sound or light.

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 in the downward direction, the second holder 140 also moves downwardly, and the cannula (C) and the needle (N) are inserted into the object, and then the second holder 140 Since the position of the drug is fixed, it is possible to stably inject the drug 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 object. The second holder 140 has a first end 142 and a second end 143 extending to both sides, and at least one of the first end 142 and the second end 143 is partially removed. 2 It is possible to allow deformation of the holder 140 . When the second holder 140 passes through the ledge, since the cut portion allows deformation in the width direction of the first end 142 and the second end 143, the second holder 140 simply passes through the ledge, The position may be fixed by the ledge.

The spirit of the present invention should not be limited to the above-described embodiments, and not only the claims described below, but also all ranges equivalent to or changed from these claims are within the scope of the spirit of the present invention. will be said to belong to

1: Drug injection system
10: drug injection device
100: needle assembly
200: reservoir unit
300: drive module
400: drive unit
600: no trigger
700: needle cover assembly
800: alarm unit

Claims (12)

You guys;
a cannula into which the needle is inserted;
a first holder for supporting the needle;
a sleeve in which the first holder is disposed in the inner space; and
a second holder supporting the cannula and disposed to face one side of the first holder, the second holder having a first end and a second end extending outward;
at least one of the first end and the second end
A portion of the incision removed to a predetermined length; having a needle assembly. According to claim 1,
at least one of the first end and the second end
The end portion extends so as to protrude from the outer circumferential surface of the first holder, and a portion of the cut-out portion is disposed radially outside the outer circumferential surface of the first holder. 3. The method of claim 2,
Another portion of the cutout is disposed between the inner peripheral surface and the outer peripheral surface of the first holder, a needle assembly. According to claim 1,
The first end is extended to one side, the end of the first cut-out portion having an open slit shape; having a needle assembly. 5. The method of claim 4,
The second end is extended to the other side, when extended in the longitudinal direction, a second cut-out portion having a closed end opening; having a needle assembly. According to claim 1,
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. base body;
a housing disposed on the base body;
a sleeve mounted to the base body and the housing;
a first holder inserted into the inner space of the sleeve and supporting the needle;
A second holder supporting the cannula into which the needle is inserted and disposed to face one side of the first holder, the second holder having a first end and a second end extending outward; includes,
at least one of the first end and the second end
A drug injection device having a; an excision part partially removed to a predetermined length. 8. The method of claim 7,
at least one of the first end and the second end
The end portion extends to protrude from the outer circumferential surface of the first holder, and a portion of the cut portion is disposed radially outside the outer circumferential surface of the first holder. 8. The method of claim 7,
At least one of the first end and the second end includes a locking protrusion protruding from the outside of the cutout;
The base body has a ledge for supporting the locking protrusion when the second holder descends; 8. The method of claim 7,
The first end is extended to one side, the end of the first cut-out portion having an open slit shape; having, a drug injection device. 11. The method of claim 10,
The second end is extended to the other side, when extended in the longitudinal direction, the end of the second cut-out portion having a closed opening; having, the drug injection device. 8. The method of claim 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, the drug injection device.

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