KR20110012571A - Drug filling device for body fluids compensated drug infusion device - Google Patents

Abstract

PURPOSE: A drug filling device for a fluid compensation type drug infusion device is provided, which enables a user to do infusion of drug and body fluid exhaustion at the same by single motion. CONSTITUTION: A drug filling device for a fluid compensation type drug infusion device comprises: a first syringe for injecting drug into a drug reservoir; a syringe fixing unit(110) in which a second syringe is fixed; first and second rotation rods(120,130) which are pivotally combined with the syringe fixing unit; first and second moving units(140,150) which are respectively combined with the first and second rotation rods and moves a piston of the first syringe and a piston of the second syringe in the opposite direction; and a rotation driving unit(160) which rotates the first and second rotation rods at the same time.

Description

DRUG FILLING DEVICE FOR BODY FLUIDS COMPENSATED DRUG INFUSION DEVICE}

The present invention relates to a drug filling device, and more particularly, a fluid-compensating drug injecting device which can easily perform drug injection (filling) and fluid discharge into a drug reservoir applied to a fluid-compensating drug injecting device simultaneously in a single operation. It relates to a drug filling device.

In general, a drug infusion device is a device developed for a patient suffering from a disease that requires continuous or intermittent drug administration for a long period of time, and is stored in a drug reservoir inside the device while implanted inside the patient's body. It is a device that can inject a desired amount of the drug into a specific part of the body when desired. Such a drug injection device includes a sealed drug reservoir for storing a drug therein, and may be classified into a gas compensated drug injection device and a body fluid compensated drug injection device according to a method of compensating an internal pressure of the drug reservoir.

The drug reservoir applied to the conventional gas-compensated drug injection device has a closed pressure compensation space having a variable volume inside the drug reservoir to compensate for the internal pressure according to the change of the remaining amount of the drug in the drug reservoir. Gas is injected into the space. In this type of drug reservoir, since the pressure compensation space is compressed and expanded according to the pressure change, only the drug injection port for injecting the drug is required.

However, the drug reservoir applied to the fluid-compensated drug injecting device stores the cerebrospinal fluid (hereinafter referred to as "body fluid") of the patient as much as the amount of drug discharged to compensate for the internal pressure according to the change of the remaining amount of the drug in the drug reservoir. To be introduced. In general, the filling interval of the drug is several weeks, so the fluid flowing into the drug reservoir will continue to accumulate inside the drug reservoir for that period, and the fluid that has accumulated for a long time will flow back into the patient's body for patient safety. It should not be. Therefore, unlike the conventional gas-compensated drug reservoir, the fluid-compensated drug reservoir is provided with a drug injection port for injecting drugs together with a fluid discharge port for discharging the fluid remaining inside the drug reservoir when the drug is injected out of the body. It is provided.

Therefore, in the case of a fluid-compensated drug injection device, when filling a drug, two syringes are simultaneously inserted into the drug injection port and the fluid discharge port to inject the drug into the drug reservoir, and at the same time, the fluid inside the drug reservoir is externally discharged. To be discharged. To this end, two people hold one syringe each and have an inconvenience of injecting (filling) and discharging fluid at the same speed. In addition, when the drug injection rate and the fluid discharge rate are different from each other, excessive pressure is applied to the diaphragm inside the drug reservoir, and if repeated, this adversely affects the durability of the drug reservoir.

The present invention has been made to solve the above problems, the fluid-compensated drug injection that can be easily carried out at the same time in a single operation in the drug storage (filling) and the fluid discharge to the drug reservoir applied to the fluid-compensated drug injection device It is an object to provide a drug filling device for the device.

Another object of the present invention is to provide a drug filling device for a bodily fluid-compensated drug injecting device capable of always maintaining the same rate of infusion of drugs and discharge rate of body fluids.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

A drug filling device according to a preferred embodiment of the present invention for achieving the above object, as a device for drug injection and body fluid discharge of the drug reservoir applied to the body fluid-compensated drug injection device, for injecting drugs into the drug reservoir A syringe holder to which a first syringe and a second syringe for sucking fluid inside the drug reservoir are fixed, rotatably coupled to the syringe holder and disposed to correspond to the first syringe and the second syringe, respectively; It is coupled to the first and second rotary rod portion, the first rotary rod portion and the second rotary rod portion, respectively, and the piston of the first syringe and the second by the rotation of the first and second rotary rod portion The first and second moving parts and the first and second rotating rod parts simultaneously to move the pistons of the syringe in opposite directions It may include a driving unit for rotation around.

The syringe fixing part may include a first cylinder fixing groove into which the cylinder curved piece of the first syringe is inserted and fixed, and a second cylinder fixing groove into which the cylinder curved piece of the second syringe is inserted and fixed.

In addition, one end of each of the first rotating rod portion and the second rotating rod portion may be rotatably coupled to the syringe fixing portion by a bearing.

In addition, a first piston fixing groove is formed on one side of the first moving part to which the bent piece of the first syringe piston is inserted and fixed, and a second piston is inserted and fixed to the bent piece of the second syringe piston to one side of the second moving part. Fixing grooves may be formed.

In addition, a first rod fastening hole is formed at the other side of the first moving part to which the first rotating rod part is inserted and fastened, and a second rod fastening hole is inserted and fastened to the other side of the second moving part. This can be formed.

In addition, a screw is formed at a fastening portion of the first and second rotating rod parts and the first and second moving parts. Preferably, a male screw is formed at an outer diameter of the first and second rotating rod parts. Inner diameters of the first and second rod fastening holes may be formed with female threads which are screwed to the male screws.

Here, the male screw directions of the first rotating rod part and the second rotating rod part may be different from each other, and the female screw directions of the first rod fastening hole and the second rod fastening hole may be different from each other. In this case, the male screw direction of the first rotating rod part and the female screw direction of the first rod fastening hole are formed to be the same, and the male screw direction of the second rotating rod part and the female screw direction of the second rod fastening hole should be formed to be the same. .

The rotation driving unit may include a rotation handle that generates a rotational force by applying an external force, and is provided between the rotation handle and the first and second rotation rods, and the rotational force of the rotation handles to the first and second rotation rods. It may include a rotational transmission unit for transmitting at the same time.

In addition, as an embodiment of the rotation transmission unit, the rotational force of the rotation handle may be transmitted to the first and second rotation rods through a gear train between the rotation handle and the first and second rotation rods. For example, the rotation transmission unit, a drive gear provided in the rotating plate of the rotary handle, and a pair of driven each provided in the first rotating rod portion and the second rotating rod portion so as to rotate simultaneously with the driving gear. It may include a gear.

In addition, as another embodiment of the rotation transmission unit, it is possible to transfer the rotational force of the rotation handle to the first and second rotation rod portion through the friction between the rotation handle and the first and second rotation rod portion. For example, the rotation transmission unit, the driving friction member provided on the rotating plate of the rotary handle, and the first rotating rod portion and the second rotating rod portion to be in contact with the driving friction member to rotate at the same time by the friction force, respectively It may include a pair of driven friction member provided.

In addition, the rotation transmission unit may have a clutch structure to control the rotation force transmitted between the rotation handle and the first and second rotation rod portion.

In addition, the drug filling device of the present invention may further include a needle connecting portion coupled to the front end of the first and second syringes and the needles of the first syringe and the second syringe, respectively.

Here, the needle connecting portion, the first needle connecting tube connecting the first syringe and the first syringe needle, the second needle connecting tube connecting the second syringe and the second syringe needle, and the first syringe It may include a needle gap adjusting member provided between the first needle connecting tube and the second needle connecting tube for adjusting the distance between the needle and the second syringe needle.

In addition, the needle connector is connected between the first syringe and the first needle connecting tube, the 3-way connector is connected to the third syringe for extracting the remaining amount of the drug remaining in the drug reservoir before refilling the drug (3-way stopcock) may be further included.

The present invention is a device for drug injection and body fluid discharge of the drug reservoir to be applied to the fluid-compensated drug injection device, a first syringe for injecting the drug into the drug reservoir and a second for inhaling the body fluid inside the drug reservoir A syringe fixing part to which the syringe is fixed, a rotary driving part generating a rotational force by applying an external force, and positioned between the syringe fixing part and the rotary driving part, and receiving the rotational force of the rotary driving part, the piston and the second syringe of the first syringe. It may include a syringe actuating portion operable to move the pistons of the syringe in opposite directions to each other.

Here, the syringe operation portion, rotatably coupled to the syringe fixing portion and the first and second rotating rod portion disposed to correspond to the first syringe and the second syringe, respectively, and the first rotating rod portion and the First and movably coupled to the second rotating rod portion, respectively, to move the piston of the first syringe and the piston of the second syringe in opposite directions by rotation of the first and second rotating rod portions; It may include a second moving unit.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the drug filling device for a fluid-compensating drug injecting device of the present invention as described above, one person injects the drug and discharges the fluid by moving the first and second syringes in opposite directions with a single operation of rotating the rotary handle. Can be done easily at the same time.

In addition, since drug injection and body fluid discharge are performed at the same time, the filling rate of the drug and the discharge rate of the body fluid can be always kept the same. Therefore, the filling / refilling efficiency of the drug may be increased, and the durability degradation may be minimized by minimizing the pressure applied to the diaphragm inside the drug reservoir due to the drug filling.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, with reference to the accompanying drawings will be described in detail the drug filling device for a fluid-compensated drug injection device according to a preferred embodiment of the present invention. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

1 is a schematic diagram of a fluid-compensated drug injection device in which the drug filling device of the present invention will be used.

As shown in FIG. 1, a general fluid-compensating drug injecting device 10 includes a case 11, a drug reservoir 13 storing a drug to be injected into a patient's body, and a drug in the drug reservoir 13. To supply power to the motor 15 generating a driving force for transmitting the body to the body, the controller 17 electronically controlling the driving of the motor 15 to regulate the discharge of the drug, and the control unit 17. A power supply unit 19 and the like.

The interior of the drug reservoir 13 is divided into a drug storage space (not shown) and a bodily fluid storage space (not shown) with one deformable diaphragm (not shown) therebetween. Here, the drug storage space is connected to the drug injection port (13a) for injecting the drug into the body of the patient, the fluid storage space is the body fluid discharge for discharging the body fluid stored in the drug reservoir 13 during the drug injection to the body It is connected to the port 13b. A drug injection port 13a and a body fluid discharge port 13b may be formed with a septum into which the first and second syringe needles 1 and 2 described later are inserted. Here, the diaphragm is preferably made of a silicon material.

In addition, the drug reservoir 13 is connected to the drug discharge catheter 14a for discharging the drug stored in the drug storage space into the body, and the body fluid inflow catheter 14b for introducing the body fluid from the body into the body fluid storage space. . Drug delivery catheter 14a is provided with an actuator 16 coupled to the motor 15 in the middle, the medical filter (not shown) may be added in the middle of the catheter (14a, 14b).

The general fluid-compensated drug injecting device 10 configured as described above is for a patient suffering from a disease in which continuous or intermittent drug administration should be performed continuously for a long period of time. The stored drug can be injected as desired into a specific area of the body as desired.

Since such a general fluid-compensated drug injecting device 10 can be understood by a known technique, a detailed description thereof will be omitted.

2 is a schematic perspective view of a drug filling device according to a preferred embodiment of the present invention, FIG. 3 is an exploded perspective view of the drug filling device shown in FIG. 2, and FIGS. 4 and 5 are components of the drug filling device shown in FIG. 3. Among them, a perspective view of a syringe holder and a moving part, and FIG. 6 is an enlarged view of portion A of FIG. 2.

2 to 6, the drug filling device 100 for drug injection and body fluid discharge of the drug reservoir 13 applied to the body fluid-compensated drug injection device 10 according to a preferred embodiment of the present invention The syringe fixing part 110, the first and second rotating rods 120 and 130, the first and second moving parts 140 and 150, and the rotation driving part 160 may be included.

The syringe fixing unit 110 is fixed to the first syringe 210 for injecting the drug into the drug reservoir 13 and the second syringe 220 for sucking the body fluid inside the drug reservoir (13). In the present exemplary embodiment, the syringe fixing part 110 exemplifies a configuration having a rectangular plate shape having a predetermined area as a whole, but is not limited thereto and may have a circular or polygonal plate shape.

On one side of the syringe fixing part 110, the first cylinder fixing groove 111a into which the curved piece 211a of the first syringe cylinder 211 is inserted and fixed, and the curved piece 221a of the second syringe cylinder 221 are provided. The second cylinder fixing groove 112a to be inserted and fixed may be formed side by side. Here, the upper and lower sides formed by side-by-side coupling the first cylinder fixing piece 111 and the second cylinder fixing piece 112 with a predetermined gap up and down with the syringe fixing part 110 on one side edge of the upper surface of the syringe fixing part 110. The first cylinder fixing groove 111a and the second cylinder fixing groove 112a may be formed through the gap. In addition, hemispherical grooves 111b and 112b are formed in some regions of the first cylinder fixing groove 111a and the second cylinder fixing groove 112a facing the outer diameters of the first syringe cylinder 211 and the second syringe cylinder 221. ) So as to accommodate a portion of the outer diameter of the first syringe cylinder 211 and the second syringe cylinder 221.

In addition, the first bearing groove in which the first bearing 121 to be described later is mounted on the other side of the syringe fixing part 110 corresponding to the first cylinder fixing groove 111a and the second cylinder fixing groove 112a, respectively. A second bearing groove 114 on which the 113 and the second bearing 131 are mounted is formed.

The first rotating rod portion 120 is formed in the shape of a long circular rod, the outer thread is formed with a male screw (120a).

One end of the first rotation rod 120, for example, the lower end of the drawing, is rotatably coupled to the syringe fixing part 110 by the first bearing 121, and is disposed to correspond to the first syringe 210. In addition, the other end of the first rotary rod 120, for example, the upper end in the drawing may be provided with a driven gear 123 or a driven friction member 125 to be described later.

The second rotary rod portion 130 is formed in the shape of a long circular rod, the outer diameter is formed with a male thread (130a).

One end of the second rotating rod 130 is rotatably coupled to the syringe fixing part 110 by the second bearing 131, and the second syringe is spaced apart from the first rotating rod 120 by a predetermined distance. It is disposed to correspond to 220. In this case, the distance between the first rotation rod 120 and the second rotation rod 130 is preferably formed to be the same as the separation distance between the first syringe piston 212 and the second syringe piston 222.

The first and second moving parts 140 and 150 are configured to move the first and second syringe pistons 212 and 222 in opposite directions by rotation of the first and second rotating rod parts 120 and 130. It is movably coupled to the first and second rotation rods (120, 130).

The first moving part 140 is formed with a first piston fixing groove 141 on which one side of the curved piece 212a of the first syringe piston 212 is inserted and fixed, and the first rotating rod part 120 is inserted therein. The first rod fastening hole 142 to be fastened may be formed at the other side. Here, the internal thread of the first rod fastening hole 142 is screwed with the male screw 120a of the first rotary rod part 120 to allow the first moving part 140 to move along the male screw 120a axis ( 140a) is formed.

The second moving part 150 has a second piston fixing groove 151 to which the bending piece 222a of the second syringe piston 222 is inserted and fixed is formed on one side, and the second rotating rod part 130 is inserted therein. The second rod fastening hole 152 to be fastened may be formed at the other side. Here, the internal thread of the second rod fastening hole 152 is screwed with the male screw 130a of the second rotary rod part 130 to allow the second moving part 150 to move along the axis of the male screw 130a ( 150a) is formed.

In addition, in the present embodiment, the first and second moving parts 140 and 150 oppose the first syringe piston 212 and the second syringe piston 222 by the rotation of the first and second rotation rod parts 120 and 130. It is preferable to appropriately select the screw direction of the fastening portion of the first and second rotation rod parts 120 and 130 and the first and second moving parts 140 and 150 so as to be able to behave in the direction. For example, as shown in FIG. 7, the male screw 120a of the first rotating rod part 120 is composed of a left screw, and the male screw 130a of the second rotating rod part 130 is composed of a right screw, respectively. Are formed differently from each other, and the female threads 140a and 150a of the first rod fastening hole 142 and the second rod fastening hole 152 also have a left thread 140a of the first rod fastening hole 142. The female screw 150a of the second rod fastening hole 152 may be formed to be different from each other by a right screw. At this time, the male screw 120a of the first rotating rod part 120 and the female screw 140a of the first rod fastening hole 142 are identically configured with the left screw, and the male screw 130a of the second rotating rod part 130 is provided. ) And the female screw 150a of the second rod fastening hole 152 should be configured with the same right screw. When the rotation transmission unit 162 rotates in the clockwise direction, the first rotation rod unit 120 and the second rotation rod unit 130 rotate simultaneously in the counterclockwise direction, but the first moving unit by the direction of the screw. 140 moves downward along the first rotation rod 120, and second movement unit 150 moves upward along the second rotation rod 130. Alternatively, on the contrary, the male screw 120a of the first rotating rod part 120 is composed of a right screw and the male screw 130a of the second rotating rod part 130 is composed of a left screw, so that the directions of the screws are different from each other. The female threads 140a and 150a of the first rod fastening hole 142 and the second rod fastening hole 152 also have a right screw and a second rod fastening hole. The female screw 150a of 152 may be formed to be different from each other by the left screw.

The rotary driving unit 160 may simultaneously perform drug injection and bodily fluid discharge by rotating the first and second rotating rods 120 and 130 in a single motion to move the first and second syringes 210 and 220 in opposite directions. Make sure

The rotation driver 160 may include a rotation handle 161 and a rotation transmission unit 162.

The rotary handle 161 generates a rotational force by applying an external force to a person.

The rotation transmission unit 162 is provided between the rotation handle 161 and the first and second rotation rod parts 120 and 130 to simultaneously transmit the rotational force of the rotation handle 161 to the first and second rotation rod parts 120 and 130. do.

The rotation transmission unit 162 according to an embodiment of the present invention is the first and second rotational force of the rotation handle 161 through a gear train between the rotation handle 161 and the first and second rotation rod parts 120 and 130. It can be transmitted to the two rotary rods (120, 130). For example, as shown in FIG. 8, the rotation transmission unit 162 is engaged with the driving gear 163 and the driving gear 163 provided along the circumference at the bottom of the rotating plate 161a of the rotation handle 161. It may be composed of a pair of driven gears (123, 133) provided on the upper end of the first rotary rod portion 120 and the upper end of the second rotary rod portion 130 so as to rotate at the same time. Here, the drive gear 163 and the pair of driven gears 123 and 133 may be configured such that the respective rotation shafts are arranged in parallel with each other, and the respective toothed gear teeth are engaged.

The rotation transmission unit 162 according to another embodiment of the present invention is the first and second rotational force of the rotation handle 161 through friction between the rotation handle 161 and the first and second rotation rods (120,130) It can be delivered to the rotating rod (120, 130). For example, as shown in FIG. 9, the rotation transmission unit 162 includes a driving friction member 165 provided along a circumference at a bottom surface of the rotating plate 161a of the rotation handle 161, and a driving friction member 165. And a pair of driven friction members 125 and 135 provided at an upper end of the first rotating rod part 120 and an upper end of the second rotating rod part 130 so as to be rotated by frictional force. Here, the driving friction member 165 and the pair of driven friction members 125 and 135 may be configured such that the friction surfaces of the conical shape contact each other.

In addition, although not shown in the drawings, the rotation transmission unit 162 according to another embodiment of the present invention is the drive gear 163 or the driving friction member 165 and any one of the driven gears (123, 133) or driven friction member An intermediate gear (not shown) or an intermediate friction member (not shown) may be added between the 125 and 135 to allow the pair of driven gears 123 and 133 or the driven friction members 125 and 135 to rotate in opposite directions. At this time, the first rotating rod 120 and the second rotating rod 130 are also rotated in the opposite direction, the first moving part 140 and the second moving part 150 is the first rotating rod ( In order to move in opposite directions on the 120 and the second rotating rod 130, the directions of the male screws 120a and 130a of the first rotating rod 120 and the second rotating rod 130 are the same. In addition, the directions of the female threads 140a and 150a of the first moving part 140 and the second moving part 150 should be formed in the same manner.

In the present embodiment, but the configuration for transmitting the rotational force of the rotation handle 161 to the first and second rotation rods (120,130) through the gear or friction to the rotation transmission unit 162, but not limited to this Configuration is possible.

In addition, the rotation transmission unit 162 preferably has a clutch structure for intermittent rotation force transmitted between the rotation handle 161 and the first and second rotation rods (120, 130). For example, the rotation handle 161 may be moved away from the first and second rotation rod parts 120 and 130 to block the rotation force, and the rotation handle 161 may be moved to the first and second rotation rod parts 120 and 130. It can be moved in contact to transmit rotational force.

10 is an exemplary view for explaining a rotation operation of the rotation transmission unit.

As shown in FIG. 10, when the driving gear 163 or the driving friction member 165 is rotated in a clockwise direction by applying an external force to the rotation handle 161 through a single operation, the pair of driven gears 123 and 133 engaged therewith or The driven friction members 125 and 135 rotate simultaneously in the counterclockwise direction. As the pair of driven gears 123 and 133 or driven friction members 125 and 135 rotate simultaneously in the counterclockwise direction, the first and second rotating rod parts 120 and 130 rotate simultaneously in the counterclockwise direction. . In this case, the first and second moving rods 140 and 150 may move the first and second syringes 210 and 220 in opposite directions by the rotation of the first and second rotating rods 120 and 130. The male screw 120a of the part 120 is composed of a left screw, and the male screw 130a of the second rotating rod part 130 is composed of a right screw, so that the directions of the screws are different from each other, and the first rod fastening hole 142 is formed. ) And the female thread 140a, 150a of the second rod fastening hole 152. The female thread 140a of the first rod fastening hole 142 is left-handed, and the female thread 150a of the second rod fastening hole 152 is right-handed. The screws may be formed differently from each other. Alternatively, on the contrary, the male screw 120a of the first rotating rod part 120 is composed of a right screw and the male screw 130a of the second rotating rod part 130 is composed of a left screw, so that the directions of the screws are different from each other. The female threads 140a and 150a of the first rod fastening hole 142 and the second rod fastening hole 152 also have a right screw and a second rod fastening hole. The female screw 150a of 152 may be formed to be different from each other by the left screw.

11 is a perspective view illustrating a state in which a 3-way connector and a needle connector are mounted on the drug filling device of the present invention, and FIG. 12 is an exploded perspective view of the needle connector of FIG. 11.

As shown in FIGS. 11 and 12, the drug filling device 100 of the present invention is coupled to the tips of the first and second syringes 210 and 220 and has a first syringe needle 1 and a second syringe needle 2. The needle connection unit 170 may be further connected.

The needle connecting unit 170 may include a first needle connecting tube 171, a second needle connecting tube 172, a needle gap adjusting member 173, a 3-way connector 174, and the like.

The first needle connecting tube 171 is configured to connect the first syringe 210 and the first syringe needle 1, the second needle connecting tube 172 is the second syringe 220 and the second syringe needle ( 2) is configured to connect.

In the present embodiment, the needle connecting portion 170 is formed in the overall U shape, the first syringe needle 1 and the second syringe needle 2 is approximately between the drug injection port 13a and the body fluid discharge port 13b They are arranged side by side downwards with a separation distance.

The needle gap adjusting member 173 is provided between the first needle connecting tube 171 and the second needle connecting tube 172 to adjust the distance between the first syringe needle 1 and the second syringe needle 2. The needle short adjusting member 173 has a length to adjust the gap between the first syringe needle 1 and the second syringe needle 2 to correspond to the gap between the drug injection port 13a and the body fluid discharge port 13b. It may include bellows (hereinafter, referred to by reference numeral 200) having a shape that is formed in a pleated shape folded in the direction and is generally referred to as a generic name 'Java'.

The 3-way connector 174 is connected between the first syringe 210 and the first needle connecting tube 171, and inside the drug reservoir 13 before injecting a new drug through the first syringe 210. A third syringe 230 is connected for completely discharging the remaining drug balance.

The three-way connector 174 selectively communicates the first syringe 210 or the third syringe 230 with the first syringe needle 1 by adjusting the direction of rotation. For example, when the valve 174a of the 3-way connector 174 is rotated clockwise, the third syringe 230, the first needle connecting tube 171, and the first syringe needle 1 communicate with each other (FIG. 14), when the valve 174a of the 3-way connector 174 is rotated counterclockwise, the first syringe 210, the first needle connecting tube 171, and the first syringe needle 1 communicate with each other ( See FIG. 16).

In addition, the drug filling device 100 of the present invention may include a syringe fixing unit 110, a rotary drive unit 160 and a syringe operation unit. Here, since the syringe fixing part 110 and the rotation driving part 160 are the same as described above, a detailed description thereof will be omitted.

The syringe operating part is positioned between the syringe fixing part 110 and the rotation driving part 160, and receives the rotational force of the rotation driving part 160 to move the first syringe piston 212 and the second syringe piston 222 in opposite directions to each other. To behave.

The syringe actuator may include first and second rotating rod parts 120 and 130 and first and second moving parts 140 and 150. Here, since the first and second rotating rods 120 and 130 and the first and second moving parts 140 and 150 are the same as described above, detailed descriptions thereof will be omitted.

The drug filling device 100 of the present invention configured as described above can easily perform drug injection (filling) and body fluid discharge to the drug reservoir 13 applied to the body fluid compensation type drug injection device 10 simultaneously in a single operation. have.

13 to 18 are exemplary views for sequentially explaining the process of filling the drug using the drug filling device of the present invention in the drug reservoir of the body fluid-compensated drug injection device.

First, as shown in FIG. 13, three syringes 210, 220, and 230 are fastened to the drug filling device 100. More specifically, the cylinder curved piece 211a of the first syringe 210 for injecting the drug into the drug reservoir 13 is inserted into the first cylinder fixing groove 111a of the syringe holder 110, and 1 By inserting the piston curved piece 212a of the syringe 210 into the first piston fixing groove 141 of the first moving part 140, the first syringe 210 can be fastened to the drug filling device 100. have. In addition, the cylinder curved piece 221a of the second syringe 220 for sucking the body fluid inside the drug reservoir 13 is inserted into the second cylinder fixing groove 112a of the syringe holder 110, and the second syringe The first and second syringes 210 and 220 can be fastened to the drug filling device 100 by inserting the piston curved piece 222a of the 220 into the second piston fixing groove 151 of the second moving part 150. Can be. In addition, the needle connecting portion 170 to which the first syringe needle 1 and the second syringe needle 2 are connected to the front end of the first and second syringes 210 and 220, respectively. In addition, the third syringe 230 for discharging the remaining amount of the drug in the drug reservoir 13 is fastened to the 3-way connector 174 connected between the first syringe 210 and the first needle connecting tube 171. .

Next, as shown in FIG. 14, the valve 174a of the 3-way connector 174 is rotated in one direction, for example, clockwise in the drawing, so that the third syringe 230, the first needle connecting tube 171, and The first syringe needle 1 is in communication.

Next, as shown in FIG. 15, the first syringe needle 1 and the second syringe needle 2 are simultaneously inserted into the drug injection port 13a and the body fluid discharge port 13b of the drug injection device 10. Afterwards, the piston of the third syringe 230 is pulled back to completely suck and remove the remaining amount of the drug in the drug reservoir 13.

Next, as shown in FIG. 16, the 3-way connector 174 is rotated in the other direction, for example counterclockwise in the drawing, so that the first syringe 210, the first needle connecting tube 171, and the first syringe are rotated. After the needle 1 is in communication, the third syringe 230 is disconnected from the 3-way connector 174.

Next, as shown in FIG. 17, the first and second syringes 210 and 220 are moved in opposite directions in a single operation of rotating the rotary handle 161 to simultaneously perform drug injection and body fluid discharge. For example, when the driving gear 163 or the driving friction member 165 is rotated in a clockwise direction by applying an external force to the rotation handle 161 through a single motion, the pair of driven gears 123 and 133 or the driving friction member (engaged with this) are rotated. 125 and 135 rotate simultaneously in the counterclockwise direction. As the pair of driven gears 123 and 133 or driven friction members 125 and 135 rotate simultaneously in the counterclockwise direction, the first and second rotating rod parts 120 and 130 rotate simultaneously in the counterclockwise direction. . As the first and second rotary rod parts 120 and 130 rotate simultaneously, the first and second moving parts 140 and 150 move the first syringe piston 212 and the second syringe piston 222 in opposite directions. Drug injection by the first syringe 210 and body fluid discharge by the second syringe 220 are performed simultaneously. At this time, in order to move the first moving part 140 and the second moving part 150 in the opposite direction by the rotation of the first rotating rod 120 and the second rotating rod 130, the first rotating rod The male screw 120a of the part 120 is composed of a left screw, and the male screw 130a of the second rotating rod part 130 is composed of a right screw, so that the directions of the screws are different from each other, and the first rod fastening hole 142 is formed. ) And the female thread 140a, 150a of the second rod fastening hole 152. The female thread 140a of the first rod fastening hole 142 is left-handed, and the female thread 150a of the second rod fastening hole 152 is right-handed. The screws may be formed differently from each other. Alternatively, on the contrary, the male screw 120a of the first rotating rod part 120 is composed of a right screw and the male screw 130a of the second rotating rod part 130 is composed of a left screw, so that the directions of the screws are different from each other. The female threads 140a and 150a of the first rod fastening hole 142 and the second rod fastening hole 152 also have a right screw and a second rod fastening hole. The female screw 150a of 152 may be formed to be different from each other by the left screw. Therefore, according to the drug filling device 100 of the present invention, since the drug injection and body fluid discharge are performed at the same time through a single operation, the filling rate of the drug and the discharge rate of the body fluid can always be kept the same. In addition, the filling / refilling efficiency of the drug can be increased, and the pressure applied to the diaphragm inside the drug reservoir can be minimized to improve durability.

Finally, as shown in FIG. 18, when the drug injection and the fluid discharge are completed, the first syringe needle 1 and the second main cheat needle 2 from the drug injection port 13a and the fluid discharge port 13b. To separate.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a block diagram of a fluid-compensating drug injection device to be used in the drug filling device of the present invention.

2 is a schematic perspective view of a drug filling device according to a preferred embodiment of the present invention.

3 is an exploded perspective view of the drug filling device shown in FIG.

4 is a perspective view of a syringe holder of the components of the drug filling device shown in FIG.

5 is a perspective view of a moving part of the components of the drug filling device shown in FIG.

FIG. 6 is an enlarged view of a portion A of FIG. 2.

7 is an exemplary view for explaining a screw direction of the fastening portions of the first and second rotation rod parts and the first and second moving parts.

8 is an exemplary view showing a first embodiment of a rotational transmission unit that can be applied to the drug filling device of the present invention.

9 is an exemplary view showing a second embodiment of the rotational transmission unit that can be applied to the drug filling device of the present invention.

10 is an exemplary view for explaining a rotation operation of the rotation transmission unit.

11 is a perspective view illustrating a state in which a 3-way connector and a needle connector are mounted on the drug filling device of the present invention.

12 is an exploded perspective view of the needle connector of FIG. 11.

13 to 18 are exemplary views for sequentially explaining the drug filling process using the drug filling device of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: drug injection device 100: drug filling device

110: syringe fixing portion 120: first rotating rod portion

123: driven gear 125: driven friction member

130: second rotating rod portion 140: first moving portion

150: second moving unit 160: rotation driving unit

161: rotation handle 162: rotation transmission unit

163: drive gear 165: drive friction member

170: needle connection 171: first needle connection tube

172: second needle connecting tube 173: needle interval adjusting member

174: 3-way connector 210: first syringe

220: second syringe 230: third syringe

Claims (21)

In the drug filling device for drug injection and body fluid discharge of the drug reservoir applied to the body fluid compensation type drug injection device, A syringe fixing part to which a first syringe for injecting a drug into the drug reservoir and a second syringe for inhaling body fluid inside the drug reservoir are fixed; First and second rotation rod parts rotatably coupled to the syringe fixing part and disposed to correspond to the first syringe and the second syringe, respectively; The first rotating rod portion and the second rotating rod portion are movably coupled to each other, and the piston of the first syringe and the piston of the second syringe by the rotation of the first and second rotating rod portion opposite directions First and second moving parts which are moved to behave in a manner; And Drug filling device comprising a rotary drive for rotating the first and second rotation rods at the same time. The method of claim 1, wherein the syringe fixing portion is formed with a first cylinder fixing groove for inserting the cylinder curved piece of the first syringe, and a second cylinder fixing groove for inserting the cylinder curved piece of the second syringe is formed. Drug filling apparatus. The drug filling apparatus according to claim 1, wherein each of the first rotating rod portion and the second rotating rod portion is rotatably coupled to the syringe fixing portion by a bearing. According to claim 1, One side of the first moving portion is formed with a first piston fixing groove for inserting and fixing the bent piece of the first syringe piston, One side of the second moving part is inserted and fixed to the bent piece of the second syringe piston Drug filling device, characterized in that the second piston fixing groove is formed. 5. The method of claim 4, wherein a first rod fastening hole is formed at the other side of the first moving part to insert and fasten the first rotating rod part, and the second rotating rod part is inserted and fastened to the other side of the second moving part. Drug filling device, characterized in that the rod fastening hole is formed. The drug filling apparatus according to claim 5, wherein a screw is formed at a fastening portion of the first and second rotation rod parts and the first and second moving parts. 7. The drug filling apparatus according to claim 6, wherein male threads are formed at outer diameters of the first and second rotary rod parts, and female threads screwed to the male screws are formed at inner diameters of the first and second rod fastening holes. . The method of claim 7, wherein the male screw direction of the first rotating rod portion and the second rotating rod portion is formed different from each other, the female screw direction of the first rod fastening hole and the second rod fastening hole is formed different from each other. Drug filling device characterized in that. 9. The method of claim 8, wherein the male screw of the first rotating rod portion is a left screw, the male screw of the second rotating rod portion is a right screw, the female screw of the first rod fastening hole is a left screw, the female screw of the second rod fastening hole is a right screw. Drug filling device characterized in that. 9. The method of claim 8, wherein the male screw of the first rotating rod portion comprises a right screw, the male screw of the second rotating rod portion comprises a left screw, the female screw of the first rod fastening hole is a right screw, and the female screw of the second rod fastening hole is a left screw. Drug filling device, characterized in that consisting of. The method of claim 1, wherein the rotary drive unit, A rotating handle generating external force by applying external force; And The drug filling device is provided between the rotary handle and the first and second rotary rod portion, and comprises a rotation transfer unit for transmitting the rotational force of the rotary handle to the first and second rotary rod at the same time. 12. The method of claim 11, wherein the rotation transmission unit is characterized in that for transmitting the rotational force of the rotary handle to the first and second rotary rod through the gear train between the rotary handle and the first and second rotary rod portion. Drug filling device. The method of claim 12, wherein the rotation transmission unit, A drive gear provided on the rotating plate of the rotating handle; And And a pair of driven gears which are respectively provided in the first rotating rod part and the second rotating rod part so as to be engaged with the driving gear at the same time. 12. The method of claim 11, wherein the rotation transmission unit is characterized in that for transmitting the rotational force of the rotary handle to the first and second rotary rod portion through the friction between the rotary handle and the first and second rotary rod portion. Drug filling device. The method of claim 14, wherein the rotation transmission unit, A driving friction member provided on the rotating plate of the rotating handle; And And a pair of driven friction members respectively provided in contact with the driving friction member so as to be simultaneously rotated by frictional force so as to be rotated by a frictional force. 12. The drug filling apparatus according to claim 11, wherein the rotation transmission unit has a clutch structure for intermittent rotation force transmitted between the rotation handle and the first and second rotation rod parts. The drug filling device of claim 1, further comprising a needle connecting portion coupled to the front ends of the first and second syringes, the needle connecting portions of which are connected to the needles of the first syringe and the second syringe, respectively. The method of claim 17, wherein the needle connector, A first needle connecting tube connecting the first syringe and the first syringe needle; A second needle connecting tube connecting the second syringe and the second syringe needle; And And a needle gap adjusting member provided between the first needle connecting tube and the second needle connecting tube to adjust the distance between the first syringe needle and the second syringe needle. 19. The method of claim 18, wherein the needle connector further comprises a 3-way connector connected between the first syringe and the first needle connecting tube, the third syringe for discharging the remaining amount of drug stored in the drug reservoir Drug filling device. In the drug filling device for drug injection and body fluid discharge of the drug reservoir applied to the body fluid compensation type drug injection device, A syringe fixing part to which a first syringe for injecting a drug into the drug reservoir and a second syringe for inhaling body fluid inside the drug reservoir are fixed; A rotary drive unit generating a rotational force by applying an external force; And Located between the syringe fixing portion and the rotational drive portion, the drug including a syringe operation unit for receiving the rotational force of the rotary drive unit to operate to move the piston of the first syringe and the piston of the second syringe in opposite directions to each other Filling device. The method of claim 20, wherein the syringe actuator, First and second rotation rod parts rotatably coupled to the syringe fixing part and disposed to correspond to the first syringe and the second syringe, respectively; And The first rotating rod portion and the second rotating rod portion are movably coupled to each other, and the piston of the first syringe and the piston of the second syringe by the rotation of the first and second rotating rod portion opposite directions A drug filling device comprising first and second moving parts which are moved to behave in a manner.

Images