KR20230097644A - Liquid Medicine Administration Device - Google Patents

Abstract

According to one embodiment of the present disclosure, the upper case; a lower case coupled to the upper case and configured to form an accommodation space therein; an inlet port and an outlet port, at least a portion of which is disposed inside the accommodation space and configured to allow external drugs to enter and exit; a main flow path disposed inside the accommodation space, extending between the inlet port and the outlet port, and configured to flow the drug; an auxiliary passage disposed inside the accommodation space, extending between the inlet port and the outlet port, and configured to allow the drug to flow independently of the drug flowing in the main passage; a piston part connected to at least a portion of the auxiliary passage and configured to store at least a portion of the drug introduced through the auxiliary passage; and a lever hinged to the upper case and having one end configured to press at least a portion of the auxiliary passage.

Description

Drug injection device {Liquid Medicine Administration Device}

The present disclosure relates to a drug injector.

The content described in this section simply provides background information for the present disclosure and does not constitute prior art.

In the medical field, drugs administered to patients must, of course, be administered according to their usage, and among these usages, the injection amount, injection rate, and injection time are very important factors.

In particular, it is important to adhere to the usage and dosage of analgesics used for postoperative pain control in patients. If this is not observed, side effects may occur depending on the type of drug. Here, side effects include, for example, respiratory depression, excessive sedation, nausea, gastrointestinal problems such as vomiting, urinary retention, pruritus, drug addiction, and the like.

Conventionally, a method of intermittently injecting an analgesic whenever a patient complains of pain was adopted. However, recently, pain controlled analgesia (PCA) has been used instead of this method so that the pain is equally controlled.

This PCA method suppresses pain while continuously injecting drugs with relatively low side effects and high effects in small amounts. In addition, when pain occurs due to an acute state change, the patient himself may additionally directly administer the drug.

On the other hand, in order to allow the patient to directly administer additional drugs, an auxiliary drug injection device is required in addition to the main injection device. Conventionally, the auxiliary injection device was characterized by including a silicon balloon. A drug is stored inside the silicone balloon, and a flow path through which the drug is administered to the patient is shielded. When the shielding of the passage is released by the patient or medical staff, the drug in the silicone balloon is administered to the patient. At this time, additional parts are required to keep the position and volume of the silicon balloon constant. Furthermore, there is a problem in that the manufacturing step of the silicon balloon is complicated, resulting in a high defect rate and an increase in manufacturing cost.

(Patent Document) Korean Patent Publication No. 10-2019-0105783

Accordingly, a main object of the present disclosure is to provide a drug injection device capable of effectively administering an additional drug to a patient while having a simple configuration.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one embodiment of the present disclosure, the upper case; a lower case coupled to the upper case and configured to form an accommodation space therein; an inlet port and an outlet port, at least a portion of which is disposed inside the accommodation space and configured to allow external drugs to enter and exit; a main flow path disposed inside the accommodation space, extending between the inlet port and the outlet port, and configured to flow the drug; an auxiliary passage disposed inside the accommodation space, extending between the inlet port and the outlet port, and configured to allow the drug to flow independently of the drug flowing in the main passage; a piston part connected to at least a portion of the auxiliary passage and configured to store at least a portion of the drug introduced through the auxiliary passage; and a lever hinged to the upper case and having one end configured to press at least a portion of the auxiliary passage.

In addition, the piston unit may include a cylinder configured to be connected to the auxiliary passage; and a piston at least partially inserted into the cylinder.

In addition, the auxiliary passage may include a first auxiliary passage extending between the inlet port and the cylinder; and a second auxiliary passage extending between the cylinder and the outlet port.

In addition, one end of the lever is characterized in that formed to press at least a portion of the second auxiliary flow path.

In addition, when the other end of the lever is pressed, the pressurization of the second auxiliary flow path by one end of the lever is released.

The piston unit may further include a piston cover formed to insert at least a portion of the cylinder and at least a portion of the piston through an opening formed at one side thereof.

In addition, a bottom surface is formed on the other side of the piston cover, the cylinder is fixed between the opening of the piston cover and the bottom surface, and the piston slides inside the piston cover, but moves in one direction by the bottom surface. It is characterized in that sliding is limited.

In addition, the piston unit is characterized in that it further comprises a sealing device mounted on one end of the piston.

In addition, a check valve disposed on the main flow path; and a check valve disposed on the auxiliary passage.

As described above, according to the present embodiment, the drug injection device according to the present disclosure includes simple components of a cylinder-piston, so that manufacturing is easy and costs can be reduced.

1 is a front perspective view of a drug injection device according to an embodiment of the present disclosure.
2 is an exploded perspective view of a drug injection device according to an embodiment of the present disclosure.
3 is a plan view showing the internal configuration of a drug injection device according to an embodiment of the present disclosure.
Figure 4 is a cross-sectional view for explaining the operation of the drug injection device according to an embodiment of the present disclosure.

Hereinafter, some embodiments of the present disclosure will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible, even if they are displayed on different drawings. In addition, in describing the present disclosure, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present disclosure, the detailed description will be omitted.

In describing the components of the embodiment according to the present disclosure, symbols such as first, second, i), ii), a), and b) may be used. These codes are only for distinguishing the component from other components, and the nature or sequence or order of the corresponding component is not limited by the codes. In the specification, when a part is said to 'include' or 'include' a certain component, it means that it may further include other components, not excluding other components unless explicitly stated otherwise. .

1 is a front perspective view of a drug injection device according to an embodiment of the present disclosure. 2 is an exploded perspective view of a drug injection device according to an embodiment of the present disclosure. 3 is a plan view showing the internal configuration of a drug injection device according to an embodiment of the present disclosure.

1 and 2, the drug injection device 1 according to an embodiment of the present disclosure includes an upper case (10), a lower case (20), one or more ports (ports, 40 and 40 '), a main line (52), an auxiliary line (4), a line connecting portion (46), a piston unit (50), a lever (60), one or more It includes all or part of the side case (70 and 70 ') and the lever fastening unit (80).

The upper case 10 and the lower case 20 constitute the overall appearance of the drug injection device 1. The lower case 20 is coupled to the upper case 10, thereby forming a cavity, that is, an accommodation space therein. Components for operating the drug injection device 1 may be accommodated in the accommodation space.

The side cases 30 and 30' are coupled to the upper case 10 and the lower case 20. The side cases 30 and 30' are preferably configured as a pair. As the side cases 30 and 30' are coupled to the upper case 10 and the lower case 20, foreign substances penetrating into the drug injection device 1 can be prevented.

At least a portion of the one or more ports 40 and 40' is housed in the receiving space. The one or more ports 40 and 40' include an inlet port 40 and an outlet port 40'. The inlet port 40 is configured to inject drugs from the outside. The outlet port 40' is configured to discharge the drug therein.

A plurality of passages are disposed inside the accommodation space. Regarding the coupling relationship of the flow path, it will be described with reference to FIGS. 2 and 3 .

The main flow path 52 is disposed in the accommodation space and extends between the inlet port 40 and the outlet port 40'. The drug injected through the inlet port 40 sequentially passes through the main flow path 52 and the outlet port 40'. The drug passing through the main flow path 52 is continuously injected into the patient in small amounts.

The auxiliary passage 54 is disposed in the accommodation space and extends between the inlet port 40 and the outlet port 40'. The auxiliary passage 54 is formed separately from the main passage 52 . That is, the drug flowing through the auxiliary flow path 54 flows independently of the drug flowing through the main flow path 52 . Administration of the drug passing through the auxiliary flow path 54 may be determined by the patient. When the patient desires to temporarily increase the dose of the drug, at least a portion of the auxiliary passage 54 is opened by pressing the lever 70 . As a result, additional drugs may be administered to the patient in addition to the drugs introduced through the main flow path 52 .

One or more check valves 56 may be disposed in at least a part of the main flow path 52 and the auxiliary flow path 54 . Due to this, the reverse flow of the drug flowing through the main flow path 52 and the auxiliary flow path 54 can be prevented.

Meanwhile, preferably, the auxiliary passage 54 includes all or part of the first auxiliary passage 540 , the second auxiliary passage 542 , and the third auxiliary passage 544 .

The first auxiliary passage 540 extends between the inlet port 40 and the check valve 56 (see FIG. 3). Specifically, one end of the first auxiliary flow path 540 is connected to the inlet port 40 and the other end of the first auxiliary flow path 540 is connected to one side of the check valve 56 .

The second auxiliary passage 542 extends between the check valve 56 and the cylinder 62 . Specifically, one end of the second auxiliary flow path 542 is connected to the other side of the check valve 56, and the other end of the second auxiliary flow path 542 is connected to the first auxiliary flow path connection port 622 (see FIG. 3). ).

The third auxiliary passage 544 extends between the cylinder 62 and the outlet port 40'. Specifically, one end of the third auxiliary passage 544 is connected to the second auxiliary passage connection port 624, and the other end of the second auxiliary passage is connected to the outlet port 40' (see FIG. 3). In this case, the second auxiliary passage connection port 624 may be formed adjacent to the first auxiliary passage connection port 622 .

Thus, the drug introduced through the inlet port 40 passes through the first auxiliary flow path 540, the check valve 56, the second auxiliary flow path 542, the first auxiliary flow path connection port 622, the cylinder 62, It can be injected into the patient through the second auxiliary passage connection port 624, the third auxiliary passage 544, and the outlet port 40'.

Figure 4 is a cross-sectional view for explaining the operation of the drug injection device according to an embodiment of the present disclosure. With reference to FIGS. 2 and 4 , components of the drug injection device 1 according to the present disclosure and an operating method thereof will be described in detail.

The piston unit 60 is connected to at least a portion of the auxiliary passage 54 . At least a portion of the drug delivered to the piston unit 60 through a portion of the auxiliary flow path 54 may be temporarily accommodated in the piston unit 60 .

The piston unit 60 includes all or part of a cylinder 62, a piston 64, a piston cover 66, and a sealing unit 68.

The cylinder 62 is connected to a point on the auxiliary passage 54. At this time, the end of the second auxiliary passage 542 is connected to the first auxiliary passage connection port 622 formed in the cylinder 62 . The drug is introduced into the cylinder 62 through the connection port 622 through the first auxiliary flow path, and the introduced drug may be at least temporarily stored in the cylinder 62 .

At the end of the opening of the cylinder 62, a plurality of first locking protrusions 620 are formed along the outer circumferential surface of the cylinder 62. O-rings (not shown) may be coupled to the plurality of first protrusions 620 . When manufacturing the cylinder 62, the plurality of first protrusions 620 may be integrally manufactured. To this end, it is preferable that the cylinder 62 and the plurality of first locking protrusions 620 are injection molded.

At least a portion of the piston 64 is configured to be inserted into the opening of the cylinder 62, and is configured to reciprocate along the longitudinal direction of the cylinder 62. When the piston 64 moves in a direction to pressurize the inside of the cylinder 62, the drug inside the cylinder 62 is discharged to the outside of the cylinder 62. Conversely, as the drug inside the cylinder 62 is discharged to the outside, the piston 64 may advance in a direction pressing the inside of the cylinder 62 . On the other hand, as the O-ring is coupled to the cylinder 62, leakage of the drug can be prevented.

A flange 640 is formed at the end of the piston 64 . Insertion of the piston 64 into the cylinder 62 may be constrained by the flange 640 . Meanwhile, the flange 640 includes a plurality of second locking protrusions 642 . O-rings (not shown) may be coupled to the plurality of second protrusions 642 . The combined O-ring can prevent drug leakage.

The piston cover 66 is formed to surround at least a portion of the cylinder 62 and at least a portion of the piston 64 . One side of the piston cover 66 is open. At least a portion of the cylinder 62 and at least a portion of the piston 64 are inserted into the open side. A bottom surface is formed on the other side of the piston cover 66, and the other side is closed.

Between the opening 660 and the bottom 662 of the piston 64, the cylinder 62 is fixed. On the other hand, although not shown in detail in the present disclosure, when the cylinder 62 is fixed to the piston cover 66 by the O-ring coupled to the plurality of first protrusions 620, the fixing force may be increased. Further, between the opening 660 and the bottom surface 662 of the piston 64, the piston 64 moves linearly. At this time, the movement of the piston 64 in the retracting direction (rightward direction in FIG. 4 ) is limited by the bottom surface 662 .

The sealing device 68 is mounted on one end of the piston 64, and at least a part thereof is disposed inside the cylinder 62. The sealing device 68 is formed to prevent the drug stored in the space between the cylinder 62 and the piston 64 from leaking to the side of the piston 64 while the piston 64 reciprocates.

The sealing device 68 is preferably made of a rubber material. However, in forming the sealing device 68, the present disclosure is not necessarily limited thereto, appropriate materials may be employed.

At least a portion of the lever 70 is hinged to the upper case 10 . The lever 70 includes a shielding portion 72 and a pressing portion 74 .

As shown in (a) of FIG. 4 , the shielding part 72 is formed to press one point of the third auxiliary passage 544 . As a result, a point of the third auxiliary flow path 544 is blocked, and the drug does not pass through the third auxiliary flow path 544 . As the third auxiliary passage 544 is shielded, the internal volume of the cylinder 62 may be maintained. That is, the drug stored in the space formed between the cylinder 62 and the piston 64 may not be discharged to the outside or injected further. Accordingly, the piston 64 does not advance or retreat unless a drug is additionally injected from the outside.

At this time, the pressing part 74 is fixed to a position where the third auxiliary passage 544 is pressed by the lever fixing part 80 . For this purpose, the lever fixing part 80 is preferably made of a flexible material.

As shown in (b) of FIG. 4, the pressing portion 74 is located on the opposite side of the pressing portion 74 and corresponds to a portion to which a user applies force. When the pressing part 74 is pressed, the shielding part 72 rotates in the opposite direction to the pressing direction of the pressing part 74 . As a result, the shielding of the third auxiliary flow path 544 is released, and the drug flows through the third auxiliary flow path 544 .

Meanwhile, as the third auxiliary passage 544 is opened, the drug stored in the space between the cylinder 62 and the piston 64 is discharged to the outside of the cylinder 62 . Due to this, the volume of the space between the cylinder 62 and the piston 64 is reduced. Accordingly, the pressure inside the cylinder 62 drops, and the piston 64 moves in the direction of pressurizing the inside of the cylinder 62 .

While force is applied to the pressing part 74, additional injection of the drug through the auxiliary flow path 54 is performed. In addition, when the force applied to the pressing portion 74 is released, the shielding portion 72 is rotated to its original position (the state in (a) of FIG. 4) by the elasticity of the lever fixing portion 80.

Due to the movement of the cylinder 62 and the piston 64, the user's discomfort can be minimized as the user additionally injects the desired amount of drug at the desired time. In addition, since the drug injection device 1 includes simple components of the cylinder 62 and the piston 64, there is an effect that manufacturing is easy and costs can be reduced.

The above description is merely an example of the technical idea of the present embodiment, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment, but to explain, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of this embodiment should be construed according to the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of rights of this embodiment.

1: drug injection device 10: upper case
20: lower case 30, 30 ': side case
40: inlet port 40': outlet port
52: main flow path 54: auxiliary flow path
56: check valve 60: piston part
70: lever 80: lever fixing part

Claims (9)

upper case;
a lower case coupled to the upper case and configured to form an accommodation space therein;
an inlet port and an outlet port, at least some of which are disposed inside the accommodation space and configured to allow external drugs to enter and exit;
a main flow path disposed inside the accommodation space, extending between the inlet port and the outlet port, and configured to flow the drug;
an auxiliary passage disposed inside the accommodating space, extending between the inlet port and the outlet port, and configured to allow the drug to flow independently of the drug flowing in the main passage;
a piston unit connected to at least a portion of the auxiliary passage and configured to store at least a portion of the drug introduced through the auxiliary passage; and
A lever hinged to the upper case and having one end formed to press at least a portion of the auxiliary passage
Drug injection device characterized in that it further comprises.
According to claim 1,
The piston part,
a cylinder configured to be connected to the auxiliary passage; and
A piston configured to be at least partially inserted into the cylinder
A drug injection device comprising a.
According to claim 2,
As the auxiliary flow,
a first auxiliary passage extending between the inlet port and the cylinder; and
A second auxiliary passage extending between the cylinder and the outlet port
A drug injection device comprising a.
According to claim 3,
Drug injection device, characterized in that one end of the lever is formed to press at least a portion of the second auxiliary flow path.
According to claim 4,
When the other end of the lever is pressed, the drug injection device characterized in that the pressurization of the second auxiliary flow path by one end of the lever is released.
According to claim 2,
The piston part,
The drug injection device further comprising a piston cover formed to insert at least a portion of the cylinder and at least a portion of the piston through an opening formed at one side.
According to claim 6,
A bottom surface is formed on the other side of the piston cover,
The cylinder is fixed between the opening of the piston cover and the bottom surface,
The piston slides inside the piston cover, the drug injection device characterized in that the sliding in one direction is limited by the bottom surface.
According to claim 1,
The piston part,
Drug injection device characterized in that it further comprises a sealing device mounted on one end of the piston.
According to claim 1,
a check valve disposed on the main flow path; and
Drug injection device characterized in that it comprises a check valve disposed on the auxiliary flow path.

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