KR102395167B1 - Drug discharge assembly and drug injection device comprising the same - Google Patents

Abstract

The present invention provides a chemical liquid discharging assembly and a chemical liquid injection device including the same, comprising: a drive piece that linearly reciprocates in one direction; A rotation unit, a flexible tube disposed adjacent to the rotation unit and having a curved section at least a portion of which extends in the circumferential direction, and is mounted to the rotation unit, and rotates while pressing the tube according to the rotation of the rotation unit It includes a force unit.

Description

Drug discharge assembly and drug injection device comprising the same

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

In general, a drug injection device such as an insulin injection device is used to inject a drug solution 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 a drug solution such as insulin into the body at a predetermined interval. 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.

Since it is important to inject the chemical in a quantitative manner in the chemical injection device, a device for dispensing the chemical in a quantitative manner is required to inject the chemical in a quantitative manner. Research for quantitatively dispensing and dispensing a chemical solution by a mechanical method is continuously being conducted.

The present invention provides a chemical liquid dispensing assembly and a chemical liquid injection device that can be operated simply and accurately by a user.

One aspect of the present invention includes a drive piece reciprocating linearly in one direction, a rotary unit in contact with an end of the drive piece, the rotary unit rotating in one direction according to the linear reciprocating motion of the drive piece, and adjacent to the rotary unit A chemical solution discharging assembly comprising a flexible tube, at least a portion of which has a curved section extending in the circumferential direction, and a biasing unit mounted on the rotation unit, and rotating while pressing the tube according to the rotation of the rotation unit to provide.

In addition, the driving piece includes a body, a first arm extending from the body, the first arm having a first bent end bent at a predetermined angle with respect to the longitudinal direction at the end, and disposed in parallel with the first arm, at the end The second arm may have a second bent end bent in a direction different from that of the first bent end.

In addition, the first bending end and the second bending end may be alternately applied to the rotation unit during the linear reciprocating motion of the driving piece.

In addition, when the pressing unit comes into contact with the curved section of the tube, the pressing unit may press the tube so that the tube is compressed at the contact point.

Another aspect of the present invention is A needle assembly, a reservoir for storing the chemical liquid discharged to the needle assembly, a drive module for linearly reciprocating a drive shaft, and a drive piece connected to the drive shaft and linearly reciprocating according to the movement of the drive shaft; But in contact with the end of the drive piece, a rotation unit rotating in one direction according to the linear reciprocating motion of the drive piece, disposed between the needle assembly and the reservoir, at least a portion of the flexible having a curved section extending in the circumferential direction It provides a medicament injection device comprising a tube, and a biasing unit mounted on the rotation unit and rotated while pressing the tube according to the rotation of the rotation unit.

The chemical liquid discharging assembly and the chemical liquid injection device according to an embodiment of the present invention may inject a chemical liquid into a subject in a quantitative amount. When the drive shaft of the driving unit linearly reciprocates, it is possible to quantitatively discharge the chemical to the needle assembly by adjusting the rotation angle of the rotating unit and controlling the amount of the chemical moving along the curve section.

The chemical liquid dispensing assembly and the chemical liquid injection device according to an embodiment of the present invention may dispense a chemical liquid a plurality of times, and accurately discharge a small amount of the chemical liquid. Since the pressing unit of the pressing unit compresses the tube, a predetermined amount of the chemical is primarily distributed between the pair of pressing points. Since the firstly dispensed drug is secondarily dispensed while moving the curve section, the drug dispensing assembly accurately dispenses a small amount of the drug, and the drug injecting device may inject the drug into the subject in a quantitative manner.

The chemical liquid dispensing assembly and the chemical liquid injection device according to an embodiment of the present invention can accurately dispense the chemical liquid with a simple driving mechanism. Even if an additional driving source is not provided to the reservoir, the chemical liquid may move from the reservoir to the needle assembly by the rotation of the pressing unit. Since the chemical solution discharging assembly functions as a driving source for moving the chemical solution while performing the function of dispensing the chemical solution, the structure of the chemical solution injection device may be simple and compact. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing a chemical injection device according to an embodiment of the present invention.
2 is a perspective view illustrating a chemical liquid discharging assembly according to an embodiment of the present invention.
FIG. 3 is a plan view illustrating the chemical liquid discharging assembly of FIG. 2 .
4 is a cross-sectional view taken along IV-IV of FIG. 2 .
5 and 6 are diagrams illustrating driving of the chemical liquid discharging assembly.
FIG. 7 is a view illustrating a reservoir connected to the chemical liquid discharging assembly of FIG. 2 .
8 is a view showing a chemical liquid discharging assembly according to another embodiment of the present invention.

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

Referring to FIG. 1 , the drug injection device 1 may be attached to a drug injection object, and may inject a drug solution stored therein in a predetermined amount to the user. In an optional embodiment, the drug injection device 1 may be mounted on the user's body. In addition, in another optional embodiment, the drug injection device 1 may be mounted on an animal to inject the drug solution.

The chemical liquid injection device 1 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.

The drug injection device 1 may be connected to the remote device 2 connected by wire or wirelessly. The user may operate the remote device 2 to use the chemical injection device 1 , and may monitor the usage state of the chemical injection device 1 . For example, the amount of the drug injected from the drug injection device 1, the number of injections of the drug, the amount of the drug stored in the reservoir, the user's bio-information, etc. can be monitored, and based on this, the user can use the drug injecting device (1) can drive

In one embodiment, the remote device 2 refers to a communication terminal capable of using an application in a wired/wireless communication environment. Here, the remote device 2 may be a user's portable terminal. In more detail, the remote device 2 may include a computer (eg, desktop, laptop, tablet, etc.), a media computing platform (eg, cable, satellite set-top box, digital video recorder), a handheld computing device (eg, For example, PDAs, e-mail clients, etc.), any type of mobile phone, any type of wearable device that can be attached to or mounted on the user's body, or any other type of computing or communication platform. However, the present invention is not limited thereto.

The drug injection device 1 and the remote device 2 may communicate via a communication network. In this case, the communication network means a communication network that provides a connection path so that the remote device 2 can transmit and receive data after accessing the service server (not shown). The communication network is, for example, wired networks such as LANs (Local Area Networks), WANs (Wide Area Networks), MANs (Metropolitan Area Networks), ISDNs (Integrated Service Digital Networks), and wireless networks such as wireless LANs, CDMA, Bluetooth, and satellite communication. may be covered, but the scope of the present invention is not limited thereto.

1 , the remote device 2 is illustrated as a single device, but the present invention is not necessarily limited thereto, and may include a plurality of devices capable of communicating with the medicament injection device 1 .

The chemical injection device 1 may include a housing 5 covering the outside and an attachment part 6 attached to the user's skin, and a plurality of parts are disposed in the inner space of the housing 5 . 3 and 7 , the chemical liquid injection device 1 may include a reservoir 10 , a needle assembly 20 , a driving module 30 , and a chemical liquid discharge assembly 100 .

The reservoir 10 stores the drug solution to be injected, and is connected to the drug solution discharging assembly 100 . The reservoir 10 may be mounted inside the housing 5 . In another embodiment, the reservoir 10 may be installed outside the housing 5 .

The needle assembly 20 is disposed on one side of the housing 5 . Since the needle assembly 20 is inserted into the user's skin, the discharged chemical may be injected into the user. The chemical solution discharging assembly 100 is installed between the needle assembly 20 and the reservoir 10 , and the chemical solution is dispensed at a preset amount or at a preset cycle to be discharged to the needle assembly 20 .

The driving module 30 is disposed in the inner space of the housing 5 , and may transmit a driving force to the chemical liquid discharging assembly 100 . In one embodiment, the driving module 30 and the chemical liquid discharging assembly 100 may be respectively arranged as separate components. In another embodiment, the driving module 30 may be composed of components constituting the chemical liquid discharging assembly 100 .

Referring to FIG. 2 , the driving module 30 may include a driving shaft 31 that linearly reciprocates in one direction. When the driving module 30 is driven, the driving shaft 31 may repeatedly move forward and backward in one direction, that is, in a longitudinal direction. A joint 32 may be installed at one side of the drive shaft 31 . The joint 32 is connected to the drive piece 150 , so that the drive piece 150 may linearly reciprocate with the linear reciprocating motion of the drive shaft 31 .

As the driving module 30, 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), electrowetting pump, etc.

2 is a perspective view illustrating the chemical liquid discharging assembly 100 according to an embodiment of the present invention, FIG. 3 is a plan view illustrating the chemical liquid discharging assembly 100 of FIG. 2 , and FIG. 4 is IV-IV of FIG. It is a cross-sectional view taken along

2 to 4 , the chemical liquid discharging assembly 100 includes a base 110, a rotation unit 120, a pressing unit 130, a tube 140, and a driving piece 150, and a driving module ( 30 ) may be connected to the driving piece 150 .

The base 110 supports the chemical liquid discharging assembly 100 and may form an exterior. At least one of the rotation unit 120 , the force unit 130 , the tube 140 , and the driving piece 150 may be installed and supported on the base 110 . The base 110 is mounted on the housing 5 , and the chemical liquid discharging assembly 100 may be installed in the inner space of the chemical liquid injection device 1 .

The base 110 may include a guide part 115 . The guide part 115 may extend along the circumferential direction of the second rotation member 122 and support the tube 140 . A portion of the guide part 115 may protrude from one surface of the base 110 , and may extend along a curved section C of the tube 140 . In addition, the other portion of the guide portion 115 may extend to the straight section (L) of the tube (140).

The guide unit 115 may support the force applied by the pressing unit 130 to guide the movement of the chemical. When the pressing unit 130 applies the tube 140 , the guide part 115 supports the tube 140 on the opposite side of the pressing unit 130 . When the pressing unit 130 applies the tube 140 in the curve section C, the tube 140 has zero internal cross-sectional area at which the chemical solution flows at the loading points H1 and H2 where the tube 140 and the pressing unit are in contact. It can be compressed as much as possible. At this time, when the pressure unit 130 rotates, the chemical solution in the tube 140 also moves. In one embodiment, the guide part 115 may be disposed on the outside of the curve section (C), and the region in which the pressing unit 130 applies the tube 140 may be disposed on the inside of the curve section (C).

In the drawings, the guide part 115 is disposed on the outside of the tube 140 , and the force unit 130 shows an embodiment disposed on the inside of the tube 140 , but is not limited thereto, and in another embodiment the guide part It is disposed on the inside of the tube, and the biasing unit may be disposed on the outside of the tube.

The guide part 115 may protrude from the base 110 to align the position of the tube 140 . Since the guide part 115 is formed along the curved section C, and the tube 140 extends along the guide part 115 , the guide part 115 can form and align the curved section C.

The base 110 may include a guide protrusion 116 . The guide protrusion 116 protrudes from one surface of the base 110 , and the guide hole 154 of the driving piece 150 may be inserted thereinto. In one embodiment, the guide protrusion 116 is provided as a pair, and a pair of guide holes 154 are respectively inserted therein to guide the movement of the driving piece 150 .

The base 110 may have a guide wall 117 . The guide wall 117 protrudes from one surface of the base 110 , and may guide the movement of the driving piece 150 . The guide wall 117 is disposed adjacent to the guide protrusion 116 , and may support the first arm 152 and the second arm 153 of the driving piece 150 .

By the guide protrusion 116 and the guide wall 117 , the drive piece 150 can be guided in a linear reciprocating motion. The guide hole 154 is inserted into the guide protrusion 116 , and the first arm 152 and the second arm 153 are inserted into the guide wall 117 extending in the moving direction, respectively, and the driving piece 150 . During this linear motion, it can move along a preset trajectory.

The rotation unit 120 is mounted on one side of the base 110 and can rotate by receiving a driving force from the driving module 30 . The rotation unit 120 is in contact with the end of the drive piece 150 , and may rotate in one direction according to the linear reciprocating motion of the drive piece 150 . The rotation unit 120 may receive a driving force from the driving module 30 , and may be defined as a configuration in which at least some components are rotated to rotate the biasing unit 130 .

In an embodiment, the rotation unit 120 may be driven by a plurality of members. The rotation unit 120 may include a first rotation member 121 and a second rotation member 122 .

The first rotating member 121 may come into contact with the end of the driving piece 150 and rotate according to the linear reciprocating motion of the driving piece 150 . The second rotation member 122 may be connected to the first rotation member 121 to rotate according to the rotation of the first rotation member 121 .

The first rotation member 121 may include a first rotation end 121a disposed to contact at least one of the first arm 152 and the second arm 153 of the driving piece 150 . The first rotation end 121a may receive a driving force from the driving piece 150 to rotate about the first axis AX1 .

The first rotation end 121a may include a plurality of first teeth T1. The first tooth T1 is disposed in the circumferential direction of the first rotation end 121a and may have a first surface S1 and a second surface S2 having different lengths. This will be described in detail below.

The first rotation member 121 may include a second rotation end 121b disposed on the opposite side of the first rotation end 121a. The first rotating end 121a and the second rotating end 121b are integrally formed, and by receiving a driving force from the first rotating end 121a, the second rotating end 121b also moves the first shaft AX1 together. can be rotated around the center.

The second rotation member 122 has a plate shape and may rotate about the second axis AX2 . The second rotation member 122 is connected to the second rotation end 121b. The second tooth of the second rotation end 121b and the third tooth of the second rotation member 122 are connected to each other, so that the second rotation member 122 is rotated by the rotation of the second rotation end 121b. can

The rotation angle of the second rotation member 122 may be determined by the number of movements of the drive shaft 31 , the number of first teeth, the number of second teeth, and the number of third teeth. In detail, the rotation angle of the first rotation member 121 according to the driving of the drive shaft 31 is set by the number of first teeth. In addition, the rotation angle of the second rotation member 122 according to the driving of the drive shaft 31 by the ratio of the number of the first teeth to the number of the second teeth, and the ratio of the number of the second teeth to the number of the third teeth can be determined. Accordingly, by adjusting the number of the first teeth, the second teeth, and the third teeth, the discharge amount of the chemical according to one driving of the driving module 30 may be adjusted.

In another embodiment, the rotation unit may be provided as a single rotation member, and may receive driving force directly from the driving module. The driving piece can directly rotate the rotating member by urging the rotating member provided with the biasing unit. When the drive shaft of the drive module linearly moves, the drive piece may linearly move together to rotate the rotating member. A biasing unit installed on the rotating member may press the tube to discharge the chemical.

The pressing unit 130 is mounted on the rotation unit 120 , and may rotate together with the rotation unit 120 . The pressing unit 130 may apply the tube 140 while rotating about the second axis AX2 . When the pressing unit 130 comes into contact with the curved section C of the tube 140 , it may press the tube 140 so that the tube 140 is compressed at the contact point.

The pressing unit 130 may include a plurality of rollers. When the chemical liquid discharging assembly 100 is driven, at least one pressing part may be disposed in the curved section C. More preferably, when the pressing unit 130 rotates, at least two or more pressing units may form the pressing points H1 and H2 in the curve section C.

As described above, at the point where the pressing unit of the pressing unit 130 and the tube 140 are in contact, the tube is compressed by the pressing unit, so that the inner cross-sectional area of the tube 140 is zero. Since at least two or more urging points H1 and H2 are formed in the curve section C, a predetermined amount of the chemical may be discharged according to the rotation angle of the second rotating member 122 . In detail, since the amount of the chemical does not change between the two pressing points H1 and H2 formed by the pressing part in the curve section C, it is primarily quantitatively distributed. Thereafter, as the second rotating member 122 rotates, the firstly dispensed chemical may be secondarily quantitatively discharged.

The number of the pressing units 130 may be set according to the length of the curve section (C). The load-bearing part may be determined by a central angle of the curve section. The number of load-bearing parts may be set according to the following equation.

[Equation]

N > 360°/ center angle of curve section (degree)

N is the number of pressing units included in the biasing unit 130 , and the central angle of the curve section is defined as the central angle of the curve section C about the second axis AX2 .

As an embodiment, if the central angle of the curve section (C) is 180 degrees as shown in FIG. 3 , the number of the pressing units forming the pressing unit 130 may be set to three or more. When the central angle of the curve section C is formed at 180 degrees, at least two force points H1 and H2 may always be formed in the curve section C when three or more loaders are provided. Accordingly, in order to firstly distribute the chemical solution by the force points H1 and H2 in the curve section C, the number of force parts may be set according to the above and Equation.

In an embodiment, the pressing unit 130 may include a first pressing unit 131 , a second pressing unit 132 , and a third pressing unit 133 . The first biasing part 131, the second biasing part 132, and the third biasing part 133 arranged at equal intervals form a biasing point with the tube 140, and when the second rotating member 122 rotates The force points H1 and H2 move along the curve section C.

In one embodiment, the pressing unit 130 may be provided with a contact cover 134 having a predetermined hardness on the outside of each of the pressing parts. The contact cover 134 may be formed of a material having a predetermined cushion, gently press the flexible tube 140 , and completely compress the tube 140 .

The tube 140 is disposed adjacent to the rotation unit 120 , and at least a portion may have a curved section extending in the circumferential direction. The tube 140 may be formed of a flexible material, and may be compressed by the pressing unit of the pressing unit 130 .

The tube 140 is installed between the reservoir 10 and the needle 20 , and may be installed to pass through the rotation unit 120 . A portion of the tube 140 may extend in a circumferential direction of the second rotation member 122 .

The tube 140 may have an inlet end 141 connected to the reservoir 10 and the first conduit P1, and an outlet end 142 connected to the needle assembly 20 through the second conduit P2. there is. In addition, a curved portion 143 is formed between the inlet end 141 and the outlet end 142 , and the curved portion 143 may extend in a circumferential direction of the second rotating member 122 . The inlet end 141 and the outlet end 142 may form a straight section L, and the curved section 153 may form a curved section C.

In one embodiment, referring to FIG. 3 , the curved part 153 may have a central angle of 180 degrees with respect to the second axis AX2 . However, the central angle of the curve portion 153 is not limited thereto, and may be variously set according to the discharge amount of the chemical, the number of the pressing portions, and the like.

In the curve section C, the tube 140 is compressed by the pressing part, so that the inner cross-sectional area of the tube 140 at the pressing points H1 and H2 may be zero. On the other hand, in the straight section (L), while the contact or pressing force between the pressing part and the tube 140 is released, the chemical liquid may be discharged to the outlet end 152 according to the movement of the pressing part.

The tube 140 may include a fixing block 144 mounted on the base 110 . The fixing block 144 is disposed at the inlet end 141 and the outlet end 142, respectively, and the fixing block 144 is mounted on the base 110 so that the position of the tube 140 can be fixed.

The driving piece 150 may be disposed between the driving module 30 and the rotation unit 120 to transmit the driving force generated by the driving module 30 to the rotation unit 120 . The drive piece 150 is connected to the drive shaft 31 , and may linearly reciprocate according to the movement of the drive shaft 31 .

The driving piece 150 may include a body 151 , a first arm 152 , a second arm 153 , and a guide hole 154 .

The body 151 may be connected to the drive shaft 31 . In detail, the joint 32 is disposed between the body 151 and the drive shaft 31 so that when the drive shaft 31 linearly reciprocates, the body 151 may also linearly reciprocate.

The first arm 152 may extend from one side of the body 151 . A first bent end 152a bent at a predetermined angle with respect to the longitudinal direction may be formed at an end of the first arm 152 . Referring to FIG. 5 , the first bent end 152a is bent toward the driving module 30 , and may have a bending angle smaller than 90 degrees in the longitudinal direction of the first arm 152 .

The second arm 153 may extend from the other side of the body 151 and may be disposed in parallel with the first arm 152 . An end of the second arm 153 may have a second bent end 153a bent in a direction different from that of the first bent end 152a. Referring to FIG. 5 , the second bent end 153a extends in a direction away from the driving module 30 , and may have a bending angle exceeding 90 degrees in the longitudinal direction of the second arm 153 .

Since the first arm 152 and the second arm 153 may have a predetermined elasticity, the first bent end 152a and the second bent end 153a when the driving piece 150 linearly reciprocates in the front-rear direction. ) may exert a pressure on the first surface S1 of the first tooth T1 or may move along the second surface S2 of the first tooth T1 .

The guide hole 154 may be installed in the body 151 and may have a larger opening area than the cross-section of the guide protrusion 116 . Since the guide hole 154 has a long hole shape, the driving piece 150 may move along the guide protrusion 116 during linear reciprocating motion.

5 and 6 are views illustrating driving of the chemical liquid discharging assembly 100 .

5 and 6 , in the chemical liquid discharging assembly 100 , the driving shaft 31 linearly reciprocates in the front-rear direction to quantitatively discharge the chemical liquid.

Hereinafter, forward movement is defined as movement of the drive shaft 31 toward the first axis AX1 , and backward movement is defined as movement of the drive shaft 31 toward the drive module 30 .

The first tooth T1 may have a first surface S1 and a second surface S2 having different lengths in an inclined direction. The length of the first surface S1 is formed to be smaller than the length of the second surface S2. That is, the second surface S2 may have a more gentle slope than the first surface S1 .

The first surface S1 may be applied by the first bent end 152a or the second bent end 153a to rotate the first rotation member 121 in one direction. On the other hand, in the second surface S2 , the first bent end 152a or the second bent end 153a may move beyond the second surface S2 . Since the driving piece 150 transmits the driving force only to the first surface S1 , the first rotating member 121 may rotate in only one direction.

As shown in FIG. 5 , when the drive shaft 31 moves backward, the first bent end 152a moves backward while in contact with the first surface S1 so that the first rotation member 121 rotates by one tooth angle. can At this time, the second bent end 153a moves along the second surface S2.

As shown in FIG. 6 , when the drive shaft 31 advances, the second bent end 153a advances while in contact with the first surface S1 so that the first rotation member 121 rotates by one tooth angle. can At this time, the first bent end 152a moves along the second surface S2.

Since the first bent end 152a and the second bent end 153a are bent in different directions, and the first tooth T1 has a different inclination between the first surface S1 and the second surface S2, The first rotation member 121 may move in only one direction due to the linear reciprocating motion of the driving piece 150 .

The rotation unit 120 is always drivably connected to any one of the first bent end 152a and the second bent end 153a. The first bent end 152a and the second bent end 153a alternately apply the rotation unit 120 when the driving piece 150 linearly reciprocates. When the driving piece 150 linearly reciprocates in the front-rear direction, since the first bent end 152a or the second bent end 153a always applies the first surface S1 of the first tooth T1, the first One rotation member 121 may continuously rotate.

When the first rotation member 121 rotates, the second rotation member 122 may also rotate. According to the rotation of the second rotation member 122 , the pressing unit 130 may apply the tube 140 , thereby primarily dispensing the chemical solution. Since the cross-sectional area of the tube 140 becomes zero at the point where the pressing unit of the pressing unit 130 and the tube 140 contact and apply the pressure, in the space between the pair of pressing points (H1, H2), the chemical liquid is primarily is distributed as

When the second rotating member 122 rotates, the pressing unit 130 also moves together to move the firstly dispensed chemical to the needle assembly 20 so that it can finally be discharged by a fixed amount. According to the driving mechanism as described above, the chemical solution is distributed twice while passing through the chemical solution discharging assembly 100 , so that a predetermined amount of the chemical solution can be discharged to the needle assembly 20 .

The pressing unit 130 may control the amount of the chemical solution primarily distributed by adjusting the number of the pressing units. For example, when the number of pressing parts is increased, the amount of the chemical solution that is primarily distributed can be set to be small, and it is possible to accurately quantitatively inject the chemical solution finally discharged.

The chemical liquid discharging assembly 100 may control the amount of the chemical discharged by the rotation angle of the rotation unit 120 and the radial length of the rotation unit 120 . The rotation angle of the rotation unit 120 and the length in the radial direction of the rotation unit 120 set the distance traveled by the chemical in the curve section (C). Since the rotation angle of the second rotation member 122 and the distance in the radial direction of the second rotation member 122 from the second axis AX2 set the movement distance of the chemical solution, the chemical solution may be quantitatively discharged.

Referring to FIG. 3 , when the second rotation member 122 rotates by θ, the second biasing unit 132 also rotates and moves to the position A. When the rotation angle of the second rotation member 122 is adjusted, the amount of the discharged chemical can be accurately controlled by moving the pressing point of the second pressing unit 132 .

FIG. 7 is a view illustrating the reservoir 10 connected to the chemical liquid discharging assembly 100 of FIG. 2 .

3 and 7 , since the chemical liquid is moved from the reservoir 10 to the needle assembly 20 by the driving of the chemical liquid discharging assembly 100 , an additional driving source for discharging the chemical to the reservoir 10 is unnecessary

The reservoir 10 has a space for storing the chemical therein. One side of the reservoir 10 is connected to the tube 140 by the first conduit P1, and the plunger 11 is disposed on the other side. In the plunger 11 , the sealing member 12 is disposed at a portion in contact with the inner wall of the reservoir 10 , thereby preventing leakage of the chemical solution through the plunger 11 .

Conventionally, in order to discharge the chemical solution from the reservoir to the needle assembly, the driving module accurately pushes the plunger, and the chemical solution is discharged to the needle assembly by the movement of the plunger. However, there is a limit to implementing a mechanism for precisely moving the plunger in order to discharge the chemical solution in a quantitative manner.

The chemical solution discharging assembly 100 may discharge the chemical solution stored in the reservoir 10 in a fixed amount to the needle assembly 20 without providing an additional driving source to the reservoir 10 .

As the pressing parts of the driving module 30 rotate while pressing the tube 140 , the chemical solution present in the tube 140 moves to the needle assembly 20 . When the chemical solution existing in the tube 140 is discharged to the needle assembly 20, the chemical solution stored in the reservoir 10 is introduced into the empty space of the tube 140 again. Accordingly, even if an additional driving force is not provided to the reservoir 10 , the chemical solution in the reservoir 10 moves to the tube 140 along the first conduit P1 and is quantitatively distributed in the chemical solution discharging assembly 100 . The chemical is discharged to the needle assembly 20 by moving to the second conduit (P2).

The chemical liquid discharging assembly 100 and the chemical liquid injection device 1 according to an embodiment of the present invention may inject a chemical liquid into an object in a quantitative amount. When the drive shaft 31 of the drive module 30 linearly reciprocates, the rotation angle of the rotation unit 120 is adjusted and the amount of the chemical moving along the curve section C is controlled to quantitatively inject the chemical into the needle assembly. (20) can be discharged.

The chemical liquid discharging assembly 100 and the chemical liquid injecting device 1 according to an embodiment of the present invention may distribute the chemical liquid a plurality of times to accurately discharge a small amount of the chemical liquid. Since the pressing unit of the pressing unit 130 compresses the tube 140 , a predetermined amount of the chemical is primarily distributed between the pair of pressing points H1 and H2 . Since the firstly dispensed drug is secondarily dispensed while moving the curve section C, the drug dispensing assembly 100 accurately dispenses a small amount of the drug, and the drug injecting device 1 injects the drug into the subject in a quantitative manner. can do.

The chemical liquid discharging assembly 100 and the chemical liquid injection device 1 according to the embodiment of the present invention can accurately dispense the chemical liquid with a simple driving mechanism. Even if an additional driving source is not provided to the reservoir 10 , the chemical liquid may move from the reservoir 10 to the needle assembly 20 by the rotation of the pressing unit 130 . Since the chemical solution discharging assembly 100 functions as a driving source for moving the chemical solution while performing the function of dispensing the chemical solution, the structure of the chemical solution injection device 1 may be simple and compact.

8 is a view showing a chemical liquid discharging assembly 100A according to another embodiment of the present invention.

Referring to FIG. 8 , in the chemical liquid discharging assembly 100A, the driving module 300 may linearly move the driving piece 250 .

The drive piece 250 is similar to the drive piece 150 of the above-described embodiment, and the drive piece 250 includes a body 251 , a first arm 252 , a second arm 253 , and a guide hole 254 . can be provided. In addition, the end of the first arm 252 is provided with a second bent end 252a, and the end of the second arm 253 has a second bent end 253a bent in the opposite direction to the first bent end. can

The driving piece 250 may include a connector 250a connected to the driving module 300 . The connector 250a is connected to the wire 310 of the driving module 300 and can linearly move in one direction according to the movement of the wire 310 . The driving module 300 applies a driving force to the driving piece 250 . By transferring, the driving piece 250 can be linearly reciprocated. The driving module 300 may include a wire 310 , a connection terminal 320 , and a control unit 330 .

The wire 310 is connected to the driving piece 250 , and may move the driving piece 250 according to the contraction and extension of the wire 310 . The wire 310 may contract or extend in length according to a control signal applied from the controller 330 .

In one embodiment, the wire 310 may be formed of a shape-memory alloy (SMA). The wire 310 may be formed of a known shape memory material and is not limited to a specific material. For example, it may be formed of an alloy of nickel and titanium.

The connection end 320 is disposed at both ends of the wire 310 , and receives an electrical signal from the control unit 330 . The connection end 320 may be formed of a material having electrical conductivity.

The controller 330 may generate and control a current signal. The controller 330 may control the current applied to the connection terminal 320 . The controller 330 may be connected to a battery (not shown) to control whether or not a current is applied from the battery to the connection terminal 320 .

For example, the control unit 330 may alternately apply an electrical signal to the connection terminal 320 , whereby the wire 310 may linearly reciprocate along one direction. That is, when a current is applied to only one of the connection ends 320 , the driving piece 250 advances by contraction or extension of one end of the wire 310 . In addition, when current is applied only to the other one of the connection ends 320 , the driving piece 250 retracts to its original position due to contraction or extension of the other end of the wire 310 . As the controller 330 controls the current signal applied to the connection terminal 320 , the wire 310 contracts or expands, whereby the driving piece may reciprocate in the front-rear direction.

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 device
100: chemical liquid dispensing assembly
110: base
120: rotation unit
130: force unit
140: tube
150: drive piece

Claims (5)

a drive piece reciprocating linearly along one direction;
a rotating unit in contact with the end of the driving piece, the rotating unit rotating in one direction according to the linear reciprocating motion of the driving piece;
a flexible tube disposed adjacent to the rotation unit and having a curved section at least a portion of which extends in the circumferential direction; and
It is mounted on the rotation unit, and according to the rotation of the rotation unit, a pressing unit that rotates while applying the tube to the rotation unit; includes,
When the driving piece moves forward, one end of the drive piece applies the rotation unit, and when the drive piece moves backward, the other end of the drive piece applies the rotation unit. According to claim 1,
The drive piece is
body;
a first arm extending from the body and having a first bent end bent at a predetermined angle with respect to the longitudinal direction at the end; and
and a second arm disposed in parallel with the first arm and having a second bent end bent in a direction different from the first bent end at an end thereof. 3. The method of claim 2,
The first bending end and the second bending end are
The chemical liquid discharging assembly, wherein the driving piece alternately applies the rotation unit during the linear reciprocating motion. According to claim 1,
The force unit is
When the tube is in contact with a curved section of the tube, the tube is pressed so that the tube is compressed at the contact point, the chemical liquid dispensing assembly. needle assembly;
a reservoir for storing the chemical liquid discharged to the needle assembly;
a drive module for linearly reciprocating the drive shaft;
a drive piece connected to the drive shaft and reciprocating linearly according to the movement of the drive shaft;
a rotating unit in contact with the end of the driving piece, the rotating unit rotating in one direction according to the linear reciprocating motion of the driving piece;
a flexible tube disposed between the needle assembly and the reservoir, at least a portion of which has a curved section extending in the circumferential direction; and
It is mounted on the rotation unit, and according to the rotation of the rotation unit, a pressing unit that rotates while applying the tube to the rotation unit; includes,
When the drive piece moves forward, one end of the drive piece applies the rotation unit, and when the drive piece moves backward, the other end of the drive piece applies the rotation unit.

Images