WO2018174454A1

WO2018174454A1 - Multi-needle module and drug injection device comprising same

Info

Publication number: WO2018174454A1
Application number: PCT/KR2018/002917
Authority: WO
Inventors: 이종대
Original assignee: 봄텍전자주식회사
Priority date: 2017-03-24
Filing date: 2018-03-13
Publication date: 2018-09-27
Also published as: KR20180108169A; KR101977796B1

Abstract

A multi-needle module is disclosed. The disclosed multi-needle module comprises: a case having a plurality of guide tubes formed therein; a movable unit movably disposed within the case, and comprising a plurality of needles capable of protruding to the outside of the case through the plurality of guide tubes; a plurality of electrode terminals fixed to the case; and a plurality of elastic members elastically supporting the movable unit within the case, and electrically connecting a plurality of electrodes and the movable unit.

Description

Multi-needle module and drug injection device having the same

The present invention relates to a multi-needle module and a drug injection device having the multi-needle module, and more particularly, to a multi-needle module and a multi- To a drug infusion device.

Various methods are used to prevent aging of the skin. Typically, a method of directly injecting a substance or medicament containing nutrients directly into the skin or applying it to the skin and indirectly delivering it is used.

To this end, injection therapy is used to inject drugs directly into the skin through the needle of a syringe, and is known as a mesotherapy treatment in cosmetic surgery. Mesotherapy is a multidirectional module that is mounted on a gun and injects drugs directly into the skin layer using injector needles. However, the method of injecting the drug in this manner can supply the nutrients to the skin layer of the skin, but the nutrients can not be sustained on the epidermis layer.

In addition, when high frequency is used, a drug can be applied to the skin, and then a high frequency can be applied to a region to which the drug is applied to supply the drug from the skin layer to the dermal layer. In this way, when the high frequency is used, the drug can be supplied to the inside of the cell, but the delivery efficiency of the drug is low because the drug is indirectly delivered.

Therefore, the drug injection methods using the conventional multi-needle module have difficulties in delivering drugs directly to skin cells, resulting in lower intracellular permeability and short duration of effect of nutrients and medicines.

In order to solve the above-mentioned problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a multi-needle module and a drug injection method, in which a liquid injected through an injection needle can be directly supplied to the inside of a skin cell by activating skin cells by applying a high frequency to a plurality of injection needles The purpose of the device is to provide.

In order to achieve the above object, according to the present invention, there is provided a blood pressure monitor comprising: a case having a plurality of guide pipes formed therein; a movable member including a plurality of injection needles projected out of the case through the plurality of guide pipes, And a plurality of elastic members which elastically support the movable unit in the case and electrically connect the plurality of electrodes and the movable unit, Module.

The plurality of electrode terminals may be fixed to the outside of the case, and a part thereof may project into the inside.

The plurality of elastic members may be in contact with the movable unit at one end and may be in contact with the plurality of electrode terminals at the other end.

The plurality of elastic members may be coil springs surrounding the plurality of injection needles.

The case may form a suction portion into which the skin is introduced at the distal end portion.

The plurality of injection needles may be arranged in a matrix form.

The lengths of the plurality of injection needles may sequentially increase according to a row of the matrix.

The lengths of the plurality of guide pipes may be arranged corresponding to the lengths of the plurality of injection needles.

According to another aspect of the present invention, there is provided a surgical instrument comprising: a body having a fitting groove formed therein; a case having a fitting protrusion coupled to the fitting groove of the body; a plurality of injection needles movably disposed in the case, A plurality of electrode terminals fixed to the case and partially protruding into the case; and a plurality of electrode terminals fixed to the case, the plurality of electrode terminals being connected to the plurality of electrode terminals, A plurality of elastic members for electrically connecting the electrode terminals to the printed circuit board and elastically supporting the needle hub; a syringe mounted on the main body and including a piston for supplying a drug to the needle hub; There is provided a drug infusion device comprising a syringe and a driving part for reciprocating the piston, The.

In the present invention, when a drug is supplied to the inside of the skin through a plurality of injection needles, the skin cell is activated by using a high frequency, so that the drug can penetrate into the skin cell effectively, thereby improving the therapeutic effect.

In addition, since the maximum projecting positions of the plurality of injection needles are arranged to be different from each other, when a drug is injected into a human body having various bends, all of the plurality of injection needles can be uniformly inserted into the skin, Uniform injection.

1 is a perspective view illustrating a drug infusion apparatus according to an embodiment of the present invention.

2 is a perspective view illustrating a multi-needle module according to an embodiment of the present invention.

3 is an exploded perspective view of the multi-needle module shown in Fig.

Figure 4 is a bottom view of the multi-needle module shown in Figure 2;

5 is a cross-sectional view taken along line A-A 'of the multi-needle module shown in Fig.

FIG. 6 is a cross-sectional view of the multi-needle module shown in FIG. 2 taken along the line B-B '.

7 is a view showing a conductor pattern printed on a printed circuit board.

8 is a view showing the liquid flow path of the injection needle support member.

9 is a view showing the liquid flow path of the needle hub.

10 is an exploded perspective view showing a multi-needle module according to another embodiment of the present invention.

11 is a view showing a case where a needle is protruded from a surface having a curvature of a multi-needle module according to another embodiment of the present invention.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. It should be understood, however, that the techniques described herein are not intended to be limited to any particular embodiment, but rather include various modifications, equivalents, and / or alternatives of the embodiments of this document. In connection with the description of the drawings, like reference numerals may be used for similar components.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this document may be interpreted in the same or similar sense as the contextual meanings of the related art and, unless expressly defined in this document, include ideally or excessively formal meanings . In some cases, even the terms defined in this document can not be construed as excluding the embodiments of this document.

Hereinafter, a configuration of a drug injection device and a multi-needle module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1, the drug injector 1 includes a power supply unit 10, a main body 30, a high frequency generator 40, a driving unit 50, and a multi-needle module 100.

The main body 30 includes a syringe mounting base (not shown) on which the syringe 20 can be moved forward and backward and includes a clamp (not shown) for fixing and interlocking the piston of the syringe mounting base do.

The power supply unit 10 supplies power to the high frequency generator 40 and the driving unit 50.

The high-frequency generator 40 generates a high-frequency wave using the supplied power source, and transmits a high-frequency pulse to the multi-needle module 100.

The driving unit 50 is preferably formed by a lead screw type linear reciprocating means including a first motor for feeding the syringe and a first lead screw, a second motor for advancing the piston, and a second lead screw. One end of the first lead screw is coupled to the shaft of the first motor and the other end of the first lead screw is fixed to the lower end of the syringe mount so that the syringe 20 can move by the power of the first motor. Further, one end of the second lead screw is coupled to the shaft of the second motor, and the other end is rotatably fixed to the lower portion of the clamp, so that the piston 25 can be advanced by the power of the second motor.

When the first motor is rotated in the forward and reverse directions, the syringe 20, which is seated on the syringe mount along the first lead screw, advances and retreats. When the second motor is rotated in the forward and reverse directions, the piston 25 interlocked by the clamp along the second lead screw is moved relative to the syringe 20.

When the syringe is advanced by forward rotation of the first motor, the injection needles disposed inside the multi-needle module 100 are advanced and inserted into the skin. When the piston 25 advances into the syringe 20 by forward rotation of the second motor after the needles are inserted into the skin, the medicament inside the syringe 20 is supplied to the skin through the needles.

The main body 30 is formed with a mounting groove 33 on which the multi-needle module 100 is mounted and the fitting protrusions 112 of the first and

second coupling members

111 and 113 The fitting grooves 31 are formed.

FIG. 2 is a perspective view showing a multi-needle module according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of the multi-needle module shown in FIG. 2, FIG. 5 is a cross-sectional view of the multi-needle module shown in FIG. 2 taken along line A-A ', FIG. 6 is a cross-sectional view taken along line B-B' 1 is a view showing a conductor pattern printed on a circuit board. Fig.

2 and 3, the multi-needle module 100 includes a case 110, a movable unit 130, an elastic member 150, and first and

second electrode terminals

171 and 172.

The case 110 has a plurality of guide pipes 119 protruding from the portion 110a in the same length toward the front of the case and a plurality of guide pipes 119 from the rim of the portion 110a of the case 110. [ And includes a long extending extension 120.

The plurality of guide tubes 119 may be arranged in a matrix. However, the arrangement of the plurality of guide pipes 119 is not limited to the matrix shape, but may be variously arranged in a state of being spaced apart from each other.

One side of the suction portion 120 extending from the case 110 includes an opening 125. The opening 125 may be connected to the suction pipe 60 (see FIG. 1). The suction pipe 60 allows a negative pressure generated from a vacuum source (not shown) to be formed in the suction portion 120. When a negative pressure is formed inside the suction unit 120, the skin contacting the tip of the case 110 may be sucked into the suction unit 120 and be brought into close contact with the tips of the plurality of guide tubes 119. Therefore, a plurality of injection needles 131 can be inserted at the same depth into the skin, allowing the drug to penetrate into the skin.

First and second engaging

members

111 and 113 are extended from both sides of the case 110, respectively. The first engaging member 111 includes a fitting protrusion 112 corresponding to the fitting groove 31 of the main body. The second engaging member 113 also includes a fitting protrusion corresponding to the fitting groove on the opposite side of the main body. In this case, the first and

second coupling members

111 and 113 are integrally formed at both ends of the case 110, and the other end is formed as a free end. When the multi-needle module 100 is inserted into the mounting groove 33 of the main body, the first and

second coupling members

111 and 113 are elastically supported on the inner surface of the mounting groove 33, The fitting projections 112 of the members are respectively engaged with the fitting grooves 31 of the mounting grooves.

The movable unit 130 includes a plurality of injection needles 131, a printed circuit board (PCB) 132, a needle support member 160, and a needle hub 140.

The plurality of injection needles 131 are inserted into the plurality of guide tubes 119 when the movable unit 130 is coupled to the rear space portion 110b of the case 110. [ Therefore, the plurality of injection needles 131 are arranged in a matrix form like the plurality of guide tubes 119. [ That is, the arrangement of the plurality of injection needles 131 preferably corresponds to the arrangement of the plurality of guide tubes 119.

The printed circuit board 132 is formed with a plurality of engagement holes 133 which can be engaged with the plurality of injection needles 131. The printed circuit board 132 is electrically connected to the plurality of injection needles 131 so as to transmit the applied current to the plurality of injection needles 131 when current is applied through the first and

second electrode terminals

171 and 172 and the elastic member 150. [ (Not shown). The printed circuit board 132 is coupled to a seating groove 169 formed at the tip of the needle supporting member 160, which will be described later. However, the present invention is not limited to the printed circuit board 132, and any shape may be used as long as it includes a conductive member formed of a conductive conductor capable of transmitting a high-frequency current to each of the injection needles 131.

The first and

second electrode terminals

171 and 172 are partially exposed to the outside of the case 110 and the remaining portions are electrically connected to each other through the

coupling openings

117 and 118 formed in the case 110 And is disposed inside the case 110. The first electrode terminal 171 is connected to the first external power supply terminal 181 and the second electrode terminal 172 is connected to the second external power supply terminal 182. One of the first and second external power supply terminals has a positive polarity and the other has a negative polarity.

The first and

second electrode terminals

171 and 172 are formed with

first coupling protrusions

173a and 174a at one end of a portion exposed to the outside of the case, And

second coupling protrusions

173b and 174b at the ends of the first and

second coupling protrusions

173a and 173b. The

first coupling protrusions

173a and 174a of the respective electrode terminals are coupled to a pair of first coupling grooves 114a formed on the outside of the case and the

second coupling protrusions

173b and 174b are coupled to a pair of 2 coupling groove 114b.

The first and

second electrode terminals

171 and 172 include

openings

175 and 176 into which the rear end portions 119c of the

guide pipes

119a and 119b of the plurality of guide pipes 119 are inserted. Since the needles passing through the

guide pipes

119a and 119b of the plurality of injection needles 131 are surrounded by the rear end 119c of the

guide pipes

119a and 119b, the first and

second electrode terminals

171 and 172, Can be prevented from being short-circuited.

The first to fourth

elastic members

150a, 150b, 150c, and 150d are disposed inside the case 110 to elastically support the injection needle support member 160. Specifically, the needle supporting member 160 is elastically supported by the first to fourth

elastic members

150a, 150b, 150c and 150d when advancing by the advancing of the

injector

20, 150b, 150c, and 150d when the external force applied to the first

elastic members

150a, 150b, 150c, and 150d is removed.

The first to fourth

elastic members

150a, 150b, 150c and 150d are disposed at positions where the elastic force applied to the injection needle support member 160 can be dispersed. The first and second

elastic members

150a and 150b, Each of which is disposed at a position capable of engaging with the first and

second electrode terminals

171 and 172. [

Although the first to fourth

elastic members

150a, 150b, 150c and 150d are shown as surrounding the injection needles 131 with intervals therebetween, they are arranged so as not to be in contact with the injection needles 131 It suffices. In addition, the first to fourth

elastic members

150a, 150b, 150c, and 150d may be surrounded by an insulator (not shown).

Although the elastic member 150 is described as four

elastic members

150a, 150b, 150c and 150d in FIG. 3, the elastic members connected to the first and second electrode terminals 171, So that the first and

second electrode terminals

171 and 172 and the movable unit 130 can be electrically connected to each other.

The injection needle support member 160 is coupled to the printed circuit board 132 at its tip end and to the injection needle hub 140 having an injection port and a liquid flow path that can supply the drug to the injection needle 131 at the rear end.

2 and 4, the injection needle support member 160 is formed with sliding

protrusions

161 and 162 on the top and bottom surfaces thereof, respectively, and is engaged with the sliding

grooves

115 and 116 formed in the case 110. The plurality of injection needles 131 coupled to the injection needle support member 160 through the printed circuit board 132 may protrude out of the case through the plurality of guide pipes of the case. In this case, the moving distance h of the sliding

protrusions

161 and 162 can be determined according to the length of the sliding

grooves

115 and 116 formed in the case, and can affect the protrusion length of the plurality of injection needles 131 .

5 and 6, the plurality of injection needles 131 pass through the printed circuit board 132 and are connected to the injection needle coupling part 166 of the injection needle support member 160, .

8 and 9, the needle supporting member 160 and the needle hub 140 include

liquid passages

145 and 165 having shapes corresponding to each other. The needle hub 140 includes a liquid injection tube 141 that is coupled to the liquid channel 145 of the needle hub 140. In this case, the printed circuit board 132 and the needle hub 140 are disposed in the rear space portion 110b of the case 110 while being coupled to the front and rear ends of the needle supporting member 160, respectively.

Referring to FIGS. 5 and 6, the relationship between the first and

second electrode terminals

171 and 172 and the case and the relationship between the printed circuit board 132 and the first and second

elastic members

150a and 150b, 1 and the

second electrode terminals

171 and 172 will be described with reference to the first electrode terminal 171 located on the line B-B 'in FIG.

The first coupling protrusion 173a formed at the first electrode terminal 171 is coupled to the first coupling groove 114a formed at the outer side of the case, The second coupling protrusion 173b formed by bending the first electrode terminal 171 projected into the case through the second coupling groove 117b is coupled to the second coupling groove 114b formed around the guide tube inside the case.

One end of the first elastic member 150a is in contact with the first electrode terminal 171 and the other end of the first elastic member 150a is in contact with the printed circuit board 132. In order to transmit the current applied to the first electrode terminal 171 to the printed circuit board 132, And is in contact with the conductive pattern of the substrate 132.

The third elastic member 150c which is not connected to the first electrode terminal 171 is coupled to the " C " type groove 110c (see FIG. 5) for fixing the elastic member formed around the plurality of guide pipes 119 do.

Referring to FIG. 7, the printed circuit board 132 has a coupling hole 133 which can be engaged with the injection needle 131. The coupling hole 133 is connected to the first and

second conductor patterns

135a and 135b. The first conductor pattern 135a is electrically connected to the first elastic member 150a in the second connection region 134b and the second conductor pattern 135b is electrically connected to the second elastic member 150b in the first connection region 134a 150b. The current supplied from the first and second external

power supply terminals

181 and 182 is transmitted to the first and

second electrode terminals

171 and 172 and the current is supplied to the first and

second electrode terminals

171 and 172 And is transmitted to the first and

second conductor patterns

135a and 135b through the connected first and second

elastic members

150a and 150b.

A current can be supplied to each of the injection needles 131 through the first and

second conductor patterns

135a and 135b.

In FIG. 7, the shapes of the first and

second conductor patterns

135a and 135b are illustratively shown, and may be formed in various patterns according to the polarity required for each of the injection needles 131.

Figs. 8 and 9 are views showing the liquid flow path of the injection needle support member and the liquid flow path of the injection needle hub, respectively.

Referring to FIG. 8, a liquid flow path 165 formed in the needle supporting member 160 is formed on the opposite surface of the surface on which the needle coupling unit 166 is located.

Referring to FIG. 9, the liquid flow path 145 formed in the needle hub 140 is disposed at the end of the liquid injection tube 141.

Each of the

liquid passages

145 and 165 may be radially disposed at the center of the liquid injection tube 141 so as to supply liquid to the plurality of injection needles 131. However, the shapes of the

liquid passages

145 and 165 are not limited to this, and a plurality of injection needles 131 may be provided so as to supply liquid to all of the plurality of injection needles 131 in the form of a lattice or swastika. If the shape is connected to the end.

A plurality of liquid outflow ports 167 are formed in a plurality of passages corresponding to the positions of the needle needles 166 in the liquid flow path 165 formed in the needle supporting member 160.

Hereinafter, the operation of the multi-needle module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The syringe 20 is placed on the syringe mount and the end of the piston 25 is clamped.

The practitioner contacts the skin of the patient with the suction unit 120 formed on one surface of the case 110. If necessary, the suction pipe 60 connected to the opening 125 sucks air into the suction unit 120 through the vacuum source 70, and the skin is sucked by the plurality of guide pipes 119.

When power is supplied to the high frequency generator 40, current is applied from the high frequency generator 40 to the first and

second electrode terminals

171 and 172 connected to the first and second

external power terminals

181 and 182. The current applied to the first electrode terminal 171 connected to the first external power supply terminal 181 flows through the first elastic member 150a to the printed circuit board 132 to the first conductive pattern 135a. A current flows to the skin through the injection needle 131 connected to the first conductive pattern 135a. The current flowing through the skin is transmitted to the second conductive pattern 135b through the injection needle 131 connected to the second conductive pattern 135b and is transmitted through the second elastic member 150b to the second electrode terminal 172 And the second external power supply terminal 182, so that current can be supplied to the skin of the operator. When the syringe 20 is advanced by the first motor and the first lead screw of the driving unit 50, the injection needle 131 protrudes out of the case 110 according to the guide of the plurality of guide pipes 119. The injection needle 131 penetrates into the inside of the skin, and supplies high frequency waves through the injection needle 131 to the skin. The injection needle 131 transmits high frequency to the skin to activate the cell tissue.

Thereafter, when the piston 25 advances according to the predetermined injection amount by the second motor and the second lead screw of the driving unit 50, the liquid is supplied to the needle hub 140 and the injection needle hub 140 and the injection needle Liquid is supplied to each of the plurality of injection needles 131 through the

liquid passages

145 and 165 formed in the needle supporting member 160. [ The liquid discharged through the injection needle 131 is transferred into the skin and can transfer the liquid to the dermal layer along the activated cell tissue.

In the case of using the multi-needle module 100 according to an embodiment of the present invention, a high frequency can be applied to the injection needles 131 penetrating the skin, and the cells of the skin into which the drug is injected through the injection needles 131 Can be activated at high frequencies, so that the injected drug is absorbed smoothly into the cell. Therefore, the sustained effect of the injected drug is long and the therapeutic effect can be enhanced.

The

elastic members

150a and 150b electrically connect the

electrode terminals

171 and 172 and the printed circuit board 132 to reduce the parts for energization and the

elastic members

150a, 150b, 150c, and 150d, Since the used needle 131 is not exposed to the outside of the case, the operator or the patient can be protected from the risk of infection. In addition, when the electrode is directly connected to the printed circuit board 132, it is difficult to arrange the conductive wire according to the movement of the printed circuit board 132, Problems can be avoided.

10 is an exploded perspective view showing a multi-needle module according to another embodiment of the present invention. 11 is a view showing a case where a needle is protruded from a surface having a curvature of a multi-needle module according to another embodiment of the present invention.

The other components of the multi-needle module 200 according to another embodiment of the present invention are the same as those of the multi-needle module 100 according to the embodiment except for the shape of the injection needle 231, the guide tube 225, . Therefore, the configuration of the multi-needle module 200 according to another embodiment of the present invention, which will be described below, will be omitted from those of the multi-needle module 100 according to one embodiment.

Referring to FIG. 10, a plurality of injection needles 231 and a guide tube 225 are spaced apart from each other like the multi-needle module 100 according to an embodiment of the present invention. However, the lengths of the plurality of

injection needles

231a, 231b, and 231c and the

guide pipes

225a, 225b, and 225c are arranged differently according to each row.

The plurality of injection needles 231 can be distinguished from the injection needles 231a arranged in the first row, the injection needles 231b arranged in the second row and the injection needles 231c arranged in the third row. The lengths of the plurality of injection needles 231 protruding from one surface of the printed circuit board 232 are sequentially shortened from the first row.

The plurality of guide pipes 225 corresponding to the plurality of injection needles 231 are also connected to the guide pipe 225a disposed in the first row, the guide pipe 225b disposed in the second row, and the guide pipe 225b disposed in the third row, (225c). The lengths of the plurality of guide pipes 225 are sequentially shortened from the first row so as to correspond to the difference in length of the plurality of injection needles 231 along each row.

The suction unit 220 extends in the direction in which the guide pipe 225 protrudes from the case 210 and the rim of the suction unit 220 surrounding the side surface of the guide pipe 225 is formed to be inclined do.

11, since the distal ends of the plurality of injection needles 231 have a slope, the practitioner can attach the multi-needle module 200, the syringe equipped with the multi-needle module 200 or the drug injection device, have. In addition, even when the skin has curvature, the length d of insertion of the plurality of injection needles 231 into the skin can be made substantially constant.

Through this, the drug can be injected at a certain depth from the surface of the skin. The multi-needle module 200 can use multi-needle modules having different degrees of inclination depending on the condition of the patient. Further, although the multi-needle module 200 is arranged in three rows with nine injection needles 231, if three or more rows of injection needles 231 are arranged for treatment of a large area, The multi-needle module 200 can be manufactured and used.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

The present invention relates to a multi-needle module and a drug injection device having the multi-needle module.

Claims

A case having a plurality of guide tubes formed therein;

A movable unit including a plurality of injection needles arranged to be able to move back and forth in the case and capable of protruding out of the case through the plurality of guide pipes;

A plurality of electrode terminals fixed to the case; And

And a plurality of elastic members for elastically supporting the movable unit in the case and electrically connecting the plurality of electrodes to the movable unit.
The method according to claim 1,

And the plurality of electrode terminals are fixed to the outside of the case, and a part thereof protrudes inward.
The method according to claim 1,

Wherein the plurality of elastic members have one end in contact with the movable unit and the other end in contact with the plurality of electrode terminals.
The method according to claim 1,

Wherein the plurality of elastic members comprise coil springs surrounding the plurality of injection needles.
The method according to claim 1,

Wherein the case has a suction portion to which the skin is to be inserted at the distal end portion.
The method according to claim 1,

Wherein the plurality of needles are arranged in a matrix.
The method according to claim 6,

Wherein the plurality of injection needles sequentially increase in length of the plurality of injection needles according to a row of the matrix.
8. The method of claim 7,

Wherein a length of the plurality of guide tubes is arranged corresponding to a length of the plurality of injection needles.
A body formed with a fitting groove;

A case having a fitting protrusion coupled to a fitting groove of the main body;

A plurality of injection needles movably disposed in the case and capable of protruding outside the case;

An injection needle hub for supplying a drug to the plurality of injection needles, the injection needle including a printed circuit board electrically connected to the plurality of injection needles;

A plurality of electrode terminals fixed to the case and partially protruding into the case;

A plurality of elastic members electrically connecting the plurality of electrode terminals to the printed circuit board and elastically supporting the needle hub;

A syringe installed in the main body, the syringe including a piston for supplying a drug to the needle hub; And

And a driving unit that moves the syringe and the piston, respectively.