KR102001674B1 - Adjustable bolus injector - Google Patents

Abstract

The present invention relates to a variable bolus injector capable of adjusting the amount of a bolus to be additionally injected according to the condition of a patient or a patient, And more particularly, to a case including a lower case, an upper case having a stepwise height adjustment groove, a case including a draw-in hole and a draw-out hole; A chemical liquid to which a chemical liquid is introduced and discharged; And a maximum height is determined by the height adjusting groove; A cylinder chamber in which a part of the chemical solution transferred to the inside of the case is connected to the chemical liquid transfer pipe; And a shooting button which is coupled with a cylinder pad which is moved up and down along the inside of the cylinder chamber and which is ascended and descended and a maximum height of which is determined by the volume control means, And the injector is discharged by using the injector.

Description

ADJUSTABLE BOLUS INJECTOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable bolus injector, and more particularly, to an adjustable bolus injector which is capable of controlling a bolus amount To a variable-type bolus injector.

Generally, the chemical liquid supply amount regulator allows the chemical liquid discharged from the chemical liquid supply device to be adjusted to be discharged by a certain amount depending on the disease and pain state of the patient, and conventionally, a part of the chemical liquid discharged from the chemical liquid supply device A button-type chemical liquid feed regulator is used, which allows the chemical liquid stored in the storage tube to flow out by a certain amount by repetitively pressurizing the storage tube using a button body which is repeatedly operated by flowing into a formed storage tube.

However, such a conventional button-type chemical-liquid supply controller is capable of controlling a chemical liquid at a constant flow rate that can be provided to an ordinary patient, but since it is impossible to control a chemical liquid at a minute flow rate, If a shock due to injection is provided to a predicted patient, it could lead to an unexpected lethal death and could not be used.

Therefore, it is possible to control the flow rate of the chemical liquid by controlling the flow rate of the chemical liquid supplied by the flow control system. However, the flow of the chemical liquid is not smooth due to the arrangement of the chemical liquid hose, There is a problem that the chemical solution due to the remaining amount of the chemical solution is lost.

Accordingly, in the Korean Patent No. 10-1312556, a plurality of chemical solution branch hoses having different flow rates are formed so as to have the same length, thereby introducing the chemical solution supply adjuster of the flow adjustment type in which all of the chemical solution hoses are uniformly arranged in a row in the case There is a bar.

However, this can also be used to approximate the amount of drug administered, but it was still impossible to control it with great precision. For example, administration of several hundred ml per hour to a patient is sufficient as a general drug administration unit, but a general drug administration unit can not be used when a very small amount of drug per hour is to be administered to a patient.

In particular, in the case of Patient Controlled Analgesia (PCA), which requires the administration of a very small amount of drug per hour to the patient, it should be strictly designed in consideration of the type of drug to be administered, the amount of the drug, do.

Thus, Korean Patent No. 10-1715900 filed by the applicant of the present invention discloses a smart cartridge used for precisely administering a very small amount of drug to a patient and a smart PCA pump capable of safely and accurately mounting the smart cartridge I have introduced it.

In addition, depending on the patient's condition and pain level, additional medicines (chemical fluids) are being supplied in addition to the quantitative supply of medicines. In other words, when the patient's pain becomes worse as well as the usual supply of the chemical solution by using the bolus device, the chemical solution is additionally supplied by using the additional bolus button to alleviate the pain.

However, there was a need to adjust the amount of bolus depending on the patient's condition and pain level, and thus each bolus injector was provided according to the amount of bolus. That is, a bolus injector is provided according to the capacity. For example, if a patient receiving 0.5 ml of bolus is to be supplied with 1.0 ml of bolus, the bolus injector used is removed, and 1.0 ml of bolus , And another bolus injector had to be used in order to receive a bolus of 1.5 ml.

In addition to the inconvenience of use and the need to produce and supply each bolus injector, the cost of maintenance, maintenance, and repair has risen as well as the cost of production. In order to solve this problem, A bolus control injector must be provided, but this was also expensive and still could not solve the cost increase problem.

(0001) Domestic Registered Patent No. 10-1312556 (0002) Korean Patent No. 10-1715900 (Smart Cartridge and Smart PCA Pump)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a variable volume bolus which can be used by adjusting the amount of the bolus in a stepwise manner by a combination of a liquid amount supplied in a fixed amount and a mechanical mechanism for controlling the amount of bolus additionally supplied. Injector.

It is another object of the present invention to provide a variable-type bolus injector which can provide a capillary applied to a pipeline without a bonding operation.

It is another object of the present invention to provide a variable-type bolus injector in which a check valve for medical use, to which a chemical liquid is applied, is configured to be able to efficiently control a high-pressure chemical liquid.

According to an aspect of the present invention, there is provided a variable bolus injector including a lower case, an upper case having a step height adjustment groove, a case including a lead-in hole and a lead-out hole; A chemical liquid to which a chemical liquid is introduced and discharged; And a maximum height is determined by the height adjusting groove; A cylinder chamber in which a part of the chemical solution transferred to the inside of the case is connected to the chemical liquid transfer pipe; And a shooting button which is coupled with a cylinder pad which is moved up and down along the inside of the cylinder chamber and which is ascended and descended and a maximum height of which is determined by the volume control means, And discharging it by using.

In addition, the lower case is formed with a chamber inserting groove for inserting and supporting the cylinder chamber. The chamber inserting groove is formed with a cut-out in the vertical direction, and the cylinder chamber is connected to the chemical liquid through the cut- .

In addition, the chemical liquid transfer tube is installed along the circumference of the lower case, and the lower case is separated from the chemical liquid transfer tube by a predetermined distance to form a support step to support the lower end of the spring.

In addition, the chemical liquid transfer pipe may include a first branch pipe connected to the inlet hole, into which the chemical liquid flows, forming the first 1-1 and second 1-2 flow paths; A second branch pipe connected to the take-out hole and discharging the chemical liquid, the second branch pipe forming a 2-1 flow path and a 2-2 flow path; A first transfer path connected at one end to the first flow path; A second conveyance path connected to the second-1 flow path and the other end; A third transfer path connected to the other end of the cylinder chamber; A fourth transfer path connected to the first-second flow path and the second-second flow path; And a third-2 flow path in which one end of the second transfer path is connected to the third-1 flow path to which the other end of the first transfer path is connected, and a third 3- Wherein the first transfer path and the fourth transfer path are connected to each other through a capillary having a capillary at the center thereof and the second transfer path is connected through a check valve , And the check valve is opened only above the transfer pressure of the chemical liquid transferred through the capillary.

The capillary is connected to a packing having holes formed on both sides of the capillary having a capillary at the center thereof and not interfering with the capillary. The capillary is connected to both sides of the capillary, And the two pipes to be coupled are male and female luer lock fitting, so that the packing is pressurized and pressed between the capillary and the two pipes by the pressurized packing. Is sealed.

In the check valve, an inlet hole is formed in the longitudinal direction in which the chemical liquid flows, and a pressure hole is formed in the inlet hole so as to have a narrow width. A discharge preventing protrusion is formed at a terminal end of the pressure hole An inflow tube formed along the rim; A discharge hole communicating with the inflow hole is formed in a longitudinal direction through which the chemical liquid flows while being hermetically sealed with the inflow pipe, and a step portion having a cut-off hole communicating with the discharge hole in the longitudinal direction in which the chemical liquid flows is formed in the discharge hole And a discharge protrusion provided at a starting end of the step portion and having a larger inner diameter than the outer diameter of the discharge preventing protrusion and protruding from the peripheral surface of the discharge hole at a predetermined interval; And an opening and closing member having a predetermined elasticity and interposed in a state of being in close contact with the discharge preventing protrusion and the supporting protrusion while maintaining a predetermined distance from the inner surface of the inlet pipe and the discharge pipe, The opening and closing member is normally in close contact with the discharge preventing protrusion and the supporting protrusion to block the flow of the chemical liquid flowing into the inlet pipe and only when the pressure of the fluid introduced into the pressing hole is equal to or higher than a predetermined pressure, And the surface of the discharge preventing protrusion is spaced apart from the surface of the discharge preventing protrusion so that the chemical solution in the inlet hole is transferred to the discharge hole.

In addition, the volume control means may include a plurality of support protrusions formed on the outer circumference portion of the height adjustment groove, and a volume key on which the upper end of the spring is coupled to the support protrusion .

In addition, a curved protrusion is formed on the upper portion of the support jaw in a protruding lengthwise direction of the support jaw, and a groove is formed in the height control groove corresponding thereto.

Further, the volume control means may further include a spring bracket, the upper end of the spring being supported by the lower portion of the spring bracket, and the upper portion of the spring bracket being supported by the lower portion of the support jaw.

The shooting button may have a step formed at a lower outer periphery of the shooting button, and may be raised or lowered along the insertion hole. When the shooting button is raised, the shooting button is supported at a lower end of the volume key to limit the height of the shoot.

The volume key may further include a key groove formed in an upper portion of the volume key, and a volume adjusting key coupled to the key groove to change a position of the support jaw supported by the height adjusting groove.

The volume control key may include: a horizontal support; A rotation support protrusion formed at a lower portion of the horizontal support portion and inserted into the key groove, respectively; And a grip portion formed on the horizontal support portion.

As described above, according to the present invention, the maximum height of the volume key and the shooting button is limited through the stepwise height adjustment groove, and the amount of the chemical solution flowing into the cylinder chamber is controlled through the height adjustment groove, You can use the amount of loose by adjusting it step by step.

In addition, by forming a curved protrusion at the upper portion of the support tine and forming a groove in correspondence with the height adjustment groove, the fixing force at the time of tightening can be improved as well as the smooth movement at the time of adjusting the amount of bolus additionally inserted.

In addition, by using a single bolus injector configured by a mechanical mechanism, a single bolus injector can be manufactured and supplied outside of each product according to the bolus supply amount, thereby improving manufacturing convenience and cost, Maintenance / maintenance / management effect can be improved, and convenience can be improved also from the user side.

Further, the cylinder chamber can be rigidly installed and supported by the configuration of the chamber insertion groove, and the chemical liquid transfer tube and the cylinder chamber can be easily connected by the configuration of the incision portion.

Further, the configuration of the support step can be configured so that the chemical liquid transfer tube and the spring do not interfere with each other.

In addition, a compact design of the variable bolus injector is possible by the connection mechanism of the chemical liquid transfer line using the capillary and the check valve.

In addition, since the packing coupled to both sides of the capillary and the pipe coupled at both sides of the capillary having the packing are screwed together and the packing is pressed to close and close, no separate bonding operation is required. There is no need for a separate joining tool and expert personnel to join the accessories, and you can complete your work with only basic manual work.

In addition, when the capillary is combined, it is formed as a simple fastening operation, so that the productivity can be greatly improved because the work efficiency can be improved, the working time can be shortened, the workforce can be reduced, And the connecting parts are coupled by the screw fastening method, the disassembly as well as the disassembly are easy, and maintenance, repair and maintenance are very easy.

Further, a high-pressure fluid can be efficiently controlled by applying a check valve having a structure in which a central portion is separated from a peripheral portion of the opening / closing plate through a structure of a support protrusion for supporting the periphery of the opening / closing plate.

In addition, by applying the spring bracket, it is possible to keep the volume key at the same level in both the up and down.

In addition, by providing a volume control key that is fastened to the keyway together with the keyway, it is possible to adjust the amount of bolus according to need, and also to control only the volume control key, can do.

Further, it is possible to provide the variable bolus injector of the present invention by mechanical mechanism without electronic control through the organic and complex design of each of the above-described components.

1 is a front perspective view of a variable bolus injector according to an embodiment of the present invention,
FIG. 2 is a rear perspective view of a variable bolus injector according to an embodiment of the present invention,
FIG. 3 is an exploded perspective view of a variable-type bolus injector according to an embodiment of the present invention,
FIG. 4 is an exploded bottom perspective view of a variable-shape bolus injector according to an embodiment of the present invention,
FIG. 5 is a view illustrating a height adjusting groove according to an embodiment of the present invention,
FIG. 6 is a perspective view of a chemical liquid transfer piping according to an embodiment of the present invention,
FIG. 7 is an exploded perspective view of a chemical liquid transfer tube according to an embodiment of the present invention,
8 to 11 are views for illustrating a coupling structure according to an embodiment of the capillary according to the present invention,
12 is an exploded cross-sectional view illustrating a coupling structure according to another embodiment of the capillary according to the present invention,
13 is an exploded perspective view of a check valve according to an embodiment of the present invention,
14 is an exploded perspective view seen from the front according to an embodiment of the check valve according to the present invention,
15 is an exploded perspective view of a check valve according to an embodiment of the present invention,
16 is an assembled cross-sectional view of an embodiment of a check valve according to the present invention,
17 is an exploded cross-sectional view of another embodiment of the check valve according to the present invention,
FIG. 18 is a sectional view of a variable volume bolus injector according to an embodiment of the present invention when a volume key is supported at a lowest position of a height adjusting groove; FIG.
FIG. 19 is a state sectional view of a variable-volume bolus injector according to an embodiment of the present invention when a volume key is supported at a highest position of a height-
FIG. 20 is a state sectional view when the shooting button is operated in the state of FIGS. 18 and 19;
FIG. 21 is a perspective view illustrating a variable volume bolus injector according to an embodiment of the present invention,
FIG. 22 and FIG. 23 are views showing an operation state of a volume control key according to an embodiment of the variable bolus injector according to the present invention. FIG.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms.

The terms used herein are used only for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front perspective view of a variable bolus injector according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a variable bolus injector according to an embodiment of the present invention, FIG. FIG. 4 is an exploded perspective view of a variable-type bolus injector according to an embodiment of the present invention, and FIG. 5 is a cross- And FIG.

The variable bolus injector of the present invention will be described with reference to FIGS. 1 to 5 as follows.

The variable bolus injector of the present invention includes a case 100, a chemical liquid transfer tube 200, a spring 300, a volume control means 400, a volume control key 500, a cylinder chamber 600, and a shooting button 700 .

The case 100 includes a lower case 110 and an upper case 120. The lower case 110 and the upper case 120 are coupled to each other to form a draw-in hole 130 and a draw-out hole 140. Of course, the positions of the inlet hole 130 and the outlet hole 140 may be formed only in the lower case 110 or only in the upper case 120.

The lower case 110 is formed with a chamber insertion groove 111 into which a cylinder chamber 600 is inserted and supported and a cutout 111-1 is formed in the chamber insertion groove 111 in a vertical direction. A plurality of support rims 112 on which the lower end of the spring 300 is seated and supported are arranged around the chamber insertion groove 111 in accordance with the shape of the spring 300. The supporting step 112 may be composed of a single unit or a plurality of units. In the present invention, a plurality of units are arranged at regular intervals. It is preferable that the support step 112 is configured so as not to interfere with the connection of the cylinder chamber 600 and the chemical liquid transfer tube 200. In addition, the chemical liquid must be spaced apart from the delivery tube 200 by a predetermined distance to support the lower end of the spring 300.

The upper case 120 is coupled to the upper portion of the lower case 110, and may have a hat shape with an open top. In the inner upper circumference of the upper case 120, stepwise height adjustment grooves 121 positioned at equal intervals of 120 degrees are formed on the same horizontal line. The step interval formed in the height adjusting groove 121 corresponds to the amount of the bolus additionally applied to the patient. That is, when setting the amount of the additional bolus to be adjusted to 0.5 ml, 1.0 ml, 1.5 ml, and 2.0 ml, four steps should be formed, and each step of the height adjusting grooves 121 should be located on the same horizontal line. The width of the stairs can be adjusted by adjusting the width of the height adjusting grooves 121. The height adjusting grooves 121 may be formed to be wide or narrow. .

The lead-in hole 130 is formed on the lower side of the case 100, and the lead-out hole 140 is formed on the lower side of the case 100. The chemical solution pumped from the outside through the tube connected to the inlet hole 130 flows into the chemical solution transfer tube 200 in the case 100 and flows through the chemical solution transfer tube 200 through the tube connected to the extraction hole 140 from outside. Is injected into the patient.

The chemical liquid transfer pipe 200 is connected to the inlet hole 130, the cylinder chamber 600, and the outlet hole 140, and is installed along the circumference of the lower case 110.

The lower end of the spring 300 is supported by the support step 112 of the lower case 110 and is expanded toward the opened upper side of the upper case 120.

The volume control means 400 is coupled to the upper end of the spring 300 and raised to a maximum height, and the maximum height is determined by the height adjustment groove 121. That is, the volume control means 400 may be constituted only by the volume key 410 or by the volume key 410 and the spring bracket 420.

An insertion hole 411 is formed in the longitudinal direction of the volume key 410 and support tines 412 corresponding to the height adjustment groove 121 are formed at equal intervals of 120 degrees on the outer circumference. The upper end portion of the spring 300 is engaged with the lower portion of the support step 412. [ Therefore, the volume key 410 is lifted by the expansion force of the spring 300, and the maximum height of the volume key 410 is limited by the supporting jaw 412 being supported by the height adjusting groove 121.

When the spring bracket 420 is configured together, the spring bracket 420 is interposed between the spring 300 and the volume key 410. That is, the upper end of the spring 300 is supported on the lower surface of the spring bracket 420, and the upper surface of the spring bracket 420 is supported on the lower side of the support jaw 412. The spring bracket 420 uniformly distributes the expansion force of the spring 300 to the volume key 410 and transmits the same.

The cylinder chamber 600 is inserted into the chamber insertion groove 111 formed in the lower case 110 and is fixedly coupled so as not to be separated. A tube (not shown) communicating with the inside is formed in the lower portion of the cylinder chamber 600 to extend in the direction of the cutout 111-1. A male threaded portion is formed at the outer periphery of the end of the tube, 200 are connected to each other by a female thread formed inside thereof. In the cylinder chamber 600, an additional chemical liquid is introduced and stored, and the volume of the cylinder chamber 600 corresponds to the amount of the additional bolus.

The shooting button 700 is coupled with a cylinder pad 710 which is lifted and lowered along the inside of the cylinder chamber 600. The cylinder chamber 600, the cylinder pad 710, and the shooting button 700, ≪ / RTI > The cylinder pad 710 is lifted and lowered while maintaining a closed state with the inner circumferential surface of the cylinder chamber 600, and the maximum rising height of the shooting button 700 is determined by the volume control means 400. That is, a step (not shown) is formed on the lower outer periphery of the shooting button 700 and is raised / lowered along the insertion hole 411. Since the step is supported by the lower end of the volume key 410, do. Although the upper portion of the cylinder chamber 600 is shown as being open in the drawing, it is also possible that only the connecting portion of the shooting button 700 connected to the cylinder pad 710 is inserted and raised. At this time, the connecting portion of the cylinder chamber 600 connected to the shooting button 700 should also be structured such that the shooting button 700 is raised and lowered while maintaining a closed state.

FIG. 6 is an exploded perspective view of a chemical liquid transfer conduit 200 according to an embodiment of the present invention, and FIG. 7 is an exploded perspective view of a chemical liquid transfer conduit 200 according to an embodiment of the present invention.

6 and 7, a chemical liquid transfer tube 200 according to the present invention will be described below.

The chemical liquid transfer conduit 200 includes a first branch pipe 210, a second branch pipe 220, a third branch pipe 230, a first transfer path 240, a second transfer path 250, A fourth conveying path 270, a capillary 280, and a check valve 290. The first conveying path 270, the second conveying path 270,

The first branch pipe 210 is connected to the inlet hole 130 and is supplied with the chemical solution and is directly connected to the first-first flow path 211 and the second- (212). The first-first flow path 211 is formed in a linear direction flowing in the inlet hole 130 and the first-second flow path 212 is formed in a direction perpendicular to the first-flow path 211. A threaded portion to be used when the capillary 280 is coupled is formed in the outer periphery of the end portions of the first-first flow path 211 and the first-second flow path 212.

The second branch pipe 220 is connected to the draw-out hole 140 to discharge the chemical solution and directly flows through the second-1 flow path 221 and the second- (222). The second-1 flow path 221 is formed in a straight line rearwardly discharged from the drawing-out hole 140, and the 2-2 flow path 222 is formed in a direction perpendicular to the second-1 flow path 221.

The first transfer path 240 is connected to the first flow path 211 at one end thereof and extends along the inner edge of the lower case 110. One end of the first conveyance path 240 is coupled to a close-coupled pipe 275 to which a capillary 280 to be described later is coupled.

The second conveying path 250 is connected to the other end of the second-1 flow path 221 and extends along the inner edge of the lower case 110.

The third conveying passage 260 is inserted into the tube connected to the lower portion of the cylinder chamber 600 and connected to the third conveying passage 260 to form a tube having a female thread on the inner side thereof. 600) and the male and female threads.

The fourth conveyance path 270 is linearly connected to the first and second flow paths 212 and 222 and the fourth conveyance path 270 is also connected to the capillary 280, Is coupled to the tube (275).

The third branch pipe 230 includes a third-second flow path 231 to which the other end of the first transfer path 240 is connected and a third-2 flow path 232 to which one end of the second transfer path 250 is connected, And the third conveying path 260 are connected to each other.

The first conveyance path 240 and the fourth conveyance path 270 are connected to each other through a capillary capillary 280 having a capillary in the center and the second conveyance path 250 is connected through a check valve 290 And the check valve 290 is opened only above the transfer pressure of the chemical liquid transferred through the capillary 280. [

FIGS. 8 to 11 are views showing a coupling structure according to an embodiment of the capillary 280 according to the present invention, and FIG. 12 is a cross-sectional view of a capillary 280 according to another embodiment of the capillary 280 according to the present invention. Sectional view showing a bonded structure.

The coupling structure of the capillary 280 applied to the present invention is such that the packing 271 and 272 formed with holes which do not interfere with the capillary are coupled to both sides of the capillary 280 on which the capillary is formed, 272 are connected to each other at both sides of the capillary 280 to which the capillaries 280 are connected. At this time, the two pipes to be coupled are screwed together to form the packing 271, 272 And the capillary 280 and the two tubes are hermetically sealed by the press packings 271 and 272. [

Therefore, it is not preferable to limit the coupling structure of the capillary 280 only in the embodiment described later, provided that it has a structure to be fastened by the above-described coupling structure.

8 to 11, a description will be made of an embodiment of the coupling structure of the capillary 280 applied to the present invention. As shown in FIGS. 10 and 11, Side, etc., and the left side is referred to as the other side, the other side, the other side, and the like.

According to an embodiment of the coupling structure of the capillary 280 applied to the present invention, the capillary 280, the first packing 271, the second packing 272, the close support pipe 273, A tight coupling pipe 274, and a close-contact pipe 275.

The capillary 280 is a tube having a capillary tube at its center, and is used in a medical instrument to regulate the flow amount of a chemical solution. Since the technology is well known in the art, a detailed description will be omitted.

According to an embodiment of the present invention, the first packing 271 and the second packing 272 are coupled to both sides of the capillary 280, and the close contact support pipe 273 is inserted into the close- And has a structure in which the back-fitting coupling pipe 274 and the close-contact pipe 275 are coupled while being male / female luer lock fitting.

The first packing 271 is formed with a hole which is not interfered with the capillary on one side thereof and includes one side circumferential portion of the capillary 280 so as to surround one side of the capillary 280 and to be coupled.

The second packing 272 has a hole on its other side which is not interfered with the capillary, and includes the other side circumferential portion of the capillary 280 so as to surround and wrap around the other side of the capillary 280.

The first packing 271 and the second packing 272 are made of a silicone material and have a lid shape having a groove and a hole communicating with the capillary tube is formed on the bottom surface of the groove. And is coupled to both sides of the capillary 280.

The capillary 280 having the first packing 271 coupled thereto is inserted into the other side of the close support pipe 273 to receive a fluid, A first step 273-1 is formed and a first-second step 273-2 is formed on the outer periphery. Although the 1-1st step 273-1 and the 1-2th step 273-2 are formed in the same vertical plane on the drawing, it is also possible to configure them in different positions as long as they support and press each other I will do it.

A second coupling 272 is coupled to the other end of the capillary 280, and a second side of the capillary 280 is inserted and supported by the second coupling 272, The other side of the close contact support tube 273 is inserted into one side of the tight fitting coupling tube 274 and the male thread 274-2 is formed at the outer periphery. It is preferable that the width of the second step 274-1 corresponds to the outer diameter of the capillary 280 to which the second packing 272 is coupled. 9 shows conceptually only a male screw portion 274-2, and the position, length and shape of the male screw portion 274-2 and the female screw portion 275-2 can be variously changed within a known technique There will be.

The contact tube 275 is formed with a hole in the longitudinal direction in which the fluid moves on the inner side, a female screw portion 275-2 corresponding to the male screw portion 274-2 is formed on the other inner circumferential surface, The step 275-1 is formed and is fastened to the tight fitting coupling tube 274 to press the first-second step 273-2.

The structure according to the embodiment described above is such that the capillary 280 is hermetically sealed between the close contact support pipe 273 and the close fitting pipe 274 by the pressing of the first packing 271 and the second packing 272 Structure.

Another embodiment according to the coupling structure of the capillary 280 applied to the present invention will be described with reference to FIG. 12, and the directions of one side and the other side are the same as those of the embodiment.

The perspective view and the exploded view are similar to the structure of the embodiment, and therefore, the description will be made based on the sectional view.

According to another embodiment of the coupling structure of the capillary 280 applied to the present invention, the capillary 280, the first packing 271, the second packing 272, the tight coupling pipe 274, (275).

The structure of the capillary 280, the first packing 271, and the second packing 272 is the same as that of the first embodiment described above.

A second coupling 272 is coupled to the other end of the capillary 280, and a second side of the capillary 280 is inserted and supported by the second coupling 272, A stepped portion 274-1 is formed, and a male screw portion 274-2 is formed at an outer circumferential portion. The position, length, and shape of the male screw portion and the female screw portion according to other embodiments may be variously changed within the known art.

The contact tube 275 is formed with a hole in the longitudinal direction in which the fluid moves on the inner side, a female screw portion 275-2 corresponding to the male screw portion 274-2 is formed on the other inner circumferential surface, And has a structure in which the step 275-1 is formed to press the first packing 271 while being fastened to the close coupling pipe 274. [

The structure according to another embodiment described above is a simplified structure as compared with the structure of the embodiment, and the capillary 280 and the tight fitting coupling pipe 274 are formed by pressing the first packing 271 and the second packing 272, And the adhesion tube 275 are sealed.

FIG. 13 is a perspective view of a check valve 290 according to an embodiment of the present invention. FIG. 14 is a cross-sectional view of a check valve 290 according to an embodiment of the present invention, Fig. 15 is an exploded perspective view showing the shapes of the holes 282-3 and the support protrusions 282-4. Fig. 15 is an exploded perspective view showing the shape of the holes 282-2 16 (a) is a view showing the state of the opening and closing member 283 of the check valve 290 applied to the present invention in the normal state, and Fig. 16 16 (b) is a view showing the operating state of the opening / closing member 283 when the fluid flows into the check valve 290 applied to the present invention, and FIG. 17 is a view showing an example of the check valve 290 Fig.

The check valve 290 applied to the present invention will be described with reference to FIGS. 13 to 17 as follows.

First, the check valve 290 includes an inlet pipe 281, an outlet pipe 282, and an opening / closing member 283.

14 through 17, the inflow pipe 281 is a tube through which the fluid flows. The inflow pipe 281 is provided with an inflow hole 281-1 (in the longitudinal direction with reference to FIG. 17) Is formed. With reference to Fig. 17, the inlet hole 281-1 widens from the right side, becomes narrower toward the left side, and widens again, and the narrowed portion forms the pressure hole 281-2. The pressurizing hole 281-2 can be understood as a stepped shape having a hollow inside the inflow hole 281-1. 15, a discharge preventing protrusion 281-3 is formed at the end of the pressing hole 281-2 in the direction of the edge of the pressing hole 281-2, and the discharge preventing protrusion 281-3 -3) are formed at the same height (left and right lengths with reference to Fig. 17). The pressure of the fluid is increased by the narrow area of the pressure hole 281-2. When the pressure of the fluid is equal to or higher than a predetermined pressure (set high pressure) as shown in Fig. 16A, The central portion excluding the peripheral portion is spaced apart from the discharge preventing protrusion 281-3 so that the pressurizing hole 281-2 is opened.

Referring to FIG. 16, the discharge pipe 282 is connected to one side of the inflow pipe 281, and the other end of the discharge pipe 282 is connected to the discharge pipe 282 An exhaust hole 282-1 communicating with the inlet hole 281-1 is formed in the direction (the transverse direction with reference to Fig. 17). 17, a step portion 282-2 is formed on the right side of the discharge hole 282-1, and a discharge preventing protrusion 281-3 is provided at the start end portion of the step portion 282-2. And a support protrusion 282-4 protruding from the inner circumferential surface of the discharge hole 282-1 at a predetermined distance from the inner circumferential surface of the discharge hole 282-1. As shown in FIG. 14, the step 282-2 is formed with a cross hole (+) cut hole 282-3 in communication with the discharge hole 282-1.

The opening and closing member 283 closes and opens the pressing hole 281-2 and is made to have a predetermined elasticity in consideration of the set pressure to be applied to the check valve 290. The opening and closing member 283 is provided with an inlet hole 281-1 And the inner diameter setting pressure of the discharge hole 282-1. The opening and closing member 283 is in close contact with the discharge preventing protrusions 281-3 and the supporting protrusions 282-4 while maintaining a state of being spaced from the circumferential surfaces of the inlet pipe 281 and the discharge pipe 200 by a predetermined distance, do.

The opening and closing member 283 includes an opening / closing plate 283-1 and a guide supporting rod 283-2.

The opening and closing plate 283-1 is interposed between the discharge preventing protrusions 281-3 and the support protrusions 282-4 and has a distance from the inner surface of the inflow pipe 281 and the discharge pipe 210 And is formed with a diameter larger than the outer diameter of the support protrusion 282-4.

The guide support rod 283-2 extends from the center of the opening / closing plate 283-1 in the direction of the center of the cutout hole 282-3 and is formed to have a smaller diameter than the inner diameter of the cutout hole 282-3. The amount of fluid flowing out through the discharge hole 282-1 can be adjusted by the configuration of the guide support rod 283-2 and the guide support rod 283-2 moves only within the inside diameter of the cutout hole 282-3 By limiting the range of movement of the opening / closing plate 283-1, it is possible to prevent the opening / closing plate 283-1 from departing from the operating radius.

The opening and closing member 283 is normally brought into close contact with the discharge preventing protrusions 281-3 and the support protrusions 282-4 so as to block the flow of the fluid flowing into the inflow pipe 281 and to enter the pressurizing hole 281-2 (281-4) is supported by the support protrusions (282-4) only when the pressure of the fluid is equal to or higher than a predetermined pressure (a predetermined high pressure) And the fluid in the pressure hole 281-2 is transferred to the discharge hole 282-1.

The operation state of the check valve 290 described above with reference to FIG. 16 will be described below.

16 (a), when the pressure of the fluid rises above the set pressure (high pressure), the central portion of the opening / closing plate 283-1 is moved toward the discharge preventing protrusion 281- 3, and the fluid is discharged through the spaced space through the cutoff hole 282-3 (the inner right side of the discharge pipe) and the discharge hole 282-1 (the inner left side of the discharge pipe).

18 is a sectional view when the volume key 410 according to the embodiment of the variable bolus injector according to the present invention is supported at the lowest position of the height adjusting groove 121. Figure 19 is a cross- 20 is a sectional view when the volume key 410 according to the embodiment of the loose injector is supported at the highest position of the height adjusting groove 121. FIG. 20 is a sectional view when the shooting button 700 is operated in the state of FIG. FIG.

The flow of the chemical liquid in the variable bolus injector of the present invention will be described with reference to FIGS. 6, 7 and 18 to 20 as follows.

The chemical liquid flows through the inlet hole 130, and the introduced chemical liquid is divided into the first-first flow path 211 and the first-second flow path 212. The first-first flow path 211 and the first-second flow path 212 are connected to the capillary 280 so as to flow to the first transfer path 240 and the fourth transfer path 270, respectively. The amount is adjusted and transported. The first conveyance path 240 flows into the third-second flow path 232 and the third-third flow path 233 through the third-first flow path 231. At this time, the chemical liquid flowing into the 3-3 flow path 233 is transferred to the second transfer path 250, but is stopped by the check valve 290 and is stopped by the cylinder chamber 600 ). ≪ / RTI > The check valve 290 operates so that the chemical liquid in the second transfer path 240 moves only to the second branch 220. The cylinder pad 710 is raised by the inflow pressure of the chemical liquid transferred to the inside of the cylinder chamber 600, and the shooting button 700 is raised together.

The step formed on the rising shooting button 700 is supported at the lower end of the volume key 410 supported in the set height adjustment groove 121 and stops the upward movement. That is, the shooting button 700 stops its upward motion by the inflow of the chemical liquid, which means that the chemical liquid has been introduced into the cylinder chamber 600 by the amount of the basically set bolus.

Meanwhile, the chemical liquid flowing into the fourth conveyance path 270 is discharged to the extraction hole 140 through the second branch pipe 220 by the check valve 290, and is administered to the patient.

The above describes the flow state of the chemical liquid before the user operates the shooting button 700. [

The chemical liquid flowing into the cylinder chamber 600 flows in only a predetermined amount through the height adjusting groove 121 and is stored in a state where the amount of the introduced chemical liquid is set to the lowest level in FIG. Is a cross-sectional view showing the state when the amount of the introduced chemical liquid is set to the maximum. 18 and 19 show a state in which the chemical liquid is filled.

FIG. 20 shows a state in which the shooting button 700 is operated in the state of FIG. 19, which is not shown, but the state of FIG. 18 can also be understood by the same principle.

When the shooting button 700 is operated, the chemical solution stored in the cylinder chamber 600 by the operating pressure moves along the third conveying path 260 through the third 3- And moves to the flow path 231 and the third-2 flow path 232. At this time, the chemical liquid to move to the first conveyance path 240 through the third-first flow path 231 is clogged with the capillary of the capillary 280 by the operating pressure, and the operating pressure is directly applied to the second conveyance path 250 To act on the check valve 290.

The check valve 290 is opened by the operating pressure and the chemical solution stored in the cylinder chamber 600 is discharged to the patient through the second branch pipe 220 to the extraction hole 140.

FIG. 21 is a perspective view illustrating a variable volume bolus injector according to an embodiment of the present invention combined with a volume control key 500 according to an embodiment of the present invention. FIGS. 22 and 23 illustrate a variable bolus injector according to an embodiment of the present invention. And an operation state of the volume control key 500. FIG.

A volume control key 500 for changing the position of the support protrusion 412 which is coupled to the key groove 413 and is supported by the height adjustment recess 121, .

The volume control key 500 includes a horizontal support part 510 and a rotation support protrusion 520 formed at a lower portion of the horizontal support part 510 and inserted into the key groove 413 through the opened upper part of the upper case 120, And a grip portion 530 formed on the upper portion of the support portion 510.

It is preferable that the volume control key 500 is stored separately in the medical staff, and medical accident can be prevented by preventing the patient or the other person from arbitrarily operating the variable bolus injector of the present invention.

Since the height adjustment grooves 121 are formed at the same horizontal position at equal intervals of 120 degrees, if the three positions are not pressed by the same force and pressure, the horizontal state is broken and the rotation becomes impossible. Therefore, Can be adjusted.

That is, in order to adjust the amount of the bolus, when the rotation support protrusion 520 formed in the volume control key 500 is inserted into the key groove 413 (see FIG. 22) while holding the grip portion 530, (Refer to FIG. 23) to change the position of the support step 412 coupled to the stepped height adjustment groove 121. In this state, At this time, it is preferable to display an identification means on the upper circumference of the upper case 120 so that the user can identify the amount of the bolus adjusted according to the rotation of the volume control key 500.

On the other hand, the supporting jaw 412 is provided with a protrusion 412-1 which is curved upward at its center in the longitudinal direction in which the supporting jaw 412 is formed, and the height adjusting groove 121 is provided with grooves 121-1 So that the volume key 410 can be smoothly rotated by minimizing the resistance that may occur during rotation.

The volume control key 500 controls the amount of the bolus to be additionally supplied depending on the condition or the demand of the patient.

Meanwhile, it is preferable that the male / female luer lock fitting coupling structure used in the medical field is applied to the female and male screw coupling structures applied to the variable bolus injector of the present invention.

100: Case
110: lower case 111: chamber insertion groove
111-1: incision part 112: support step
120: upper case 121: height adjusting groove
121-1: groove 130: inlet hole
140: Draw-out hole
200:
210: 1 st branch office 211: 1-1 Euro
212: 1-2 Euro 220: 2nd Branch
221: 2-1 Euro 222: 2-2 Euro
230: 3rd branch Agency 231: 3-1 Euro
232: 3-2 Euro 233: 3-3 Euro
240: first feed path 250: second feed path
260: Third feed path
270: capillary 271: first packing
272: second packing 273: close support pipe
273-1: Step 1-1: 273-2: Step 1-2
274: close fitting tube 274-1: second step
274-2: male screw portion 275: tight fitting tube
275-1: Third step 275-2: Female thread part
280: check valve 281: inlet pipe
281-1: inlet hole 281-2: pressure hole
281-3: discharge prevention projection 282: discharge pipe
282-1: discharge hole 282-2: step jaw
282-3: incision hole 282-4: support projection
283: opening / closing member 283-1: opening / closing plate
283-2: Guide rod
300: spring
400: Volume control means
410: volume key 411: insertion hole
412: Supporting chin 412-1: Projection
413: keyway
420: spring bracket
500: Volume control keys
510: horizontal support 520: rotation support projection
530:
600: cylinder chamber
700: Shooting button
710: Cylinder pad

Claims (4)

A case including a lower case, an upper case having a height adjusting groove formed stepwise at a plurality of positions at an inner peripheral portion, the upper case having an upper opening, an inlet hole and an outlet hole; A chemical solution conduit connected to the inside of the case through the inlet hole to introduce the chemical solution and connected to the outside of the case through the extraction hole to discharge the chemical solution; A spring located inside the case and expanding toward an open upper side of the upper case; A volume control means coupled to an upper portion of the spring and raised to a maximum height by an expansion force of the spring, the maximum height being determined by the height adjustment groove; A cylinder chamber which is located inside the case and is coupled to the lower case, the cylinder chamber being connected to the chemical liquid transfer pipe to introduce a part of the chemical liquid transferred into the case; And a shooting button coupled with a cylinder pad which is moved up and down along the inside of the cylinder chamber, the shooting button being lowered by an operating pressure that is raised and depressed by the pressure of the introduced chemical liquid and a maximum rising height is determined by the volume control means, The chemical liquid flowing into the cylinder chamber is discharged by operating the shooting button,
The chemical liquid transfer conduit is connected to the inlet hole to introduce a chemical liquid, a first branch which forms a first-first flow path and a first-second flow path, through which the chemical solution flows from the inside of the case, A second branch which is connected to the draw-out hole and discharges the chemical liquid, and forms a second-1 flow path and a second 2-flow path in which the chemical liquid flowing through the first branch is discharged from the case; A first conveying path connected at one end with the first 1-1 flow path and extending along an inner edge of the case; A second conveying path connected to the second-1 flow path and the other end and extending along the inner edge of the case; A third conveying passage to which the other end is connected to the cylinder chamber; A fourth transfer path connected to the first-second flow path and the second-second flow path; And a third-2 flow path in which one end of the second transfer path is connected to the third-1 flow path to which the other end of the first transfer path is connected, and a third 3- Wherein the first transfer path and the fourth transfer path are connected to each other through a capillary having a capillary at the center thereof and the second transfer path is connected through a check valve , The check valve is opened only above the transfer pressure of the chemical liquid transferred through the capillary,
In the check valve, an inflow hole is formed in the longitudinal direction in which the chemical solution flows, an inflow hole formed in the inflow hole is formed with a narrow width, and a discharge preventing protrusion is formed on the end of the inflation hole. An inflow tube formed along; A discharge hole communicating with the inflow hole is formed in a longitudinal direction through which the chemical liquid flows while being hermetically sealed with the inflow pipe, and a step portion having a cut-off hole communicating with the discharge hole in the longitudinal direction in which the chemical liquid flows is formed in the discharge hole And a discharge protrusion provided at a starting end of the step portion and having a larger inner diameter than the outer diameter of the discharge preventing protrusion and protruding from the peripheral surface of the discharge hole at a predetermined interval; And an opening and closing member having a predetermined elasticity and interposed in a state of being in close contact with the discharge preventing projection and the supporting projection while maintaining a state of being spaced apart from the inner surface of the inlet tube and the discharge tube by a predetermined distance,
The opening / closing member is normally in close contact with the discharge preventing protrusion and the supporting protrusion to block the flow of the chemical liquid flowing into the inlet pipe, and only when the pressure of the fluid flowing into the pressing hole is equal to or higher than a predetermined pressure, And the surface of the discharge preventing protrusion is in close contact with the surface of the discharge preventing protrusion, so that the chemical solution in the inlet hole is transferred to the discharge hole.
delete 2. The capillary according to claim 1,
A capillary having a capillary formed at its center and a packing having a hole formed therein that is not interfered with the capillary are coupled to both sides of the capillary, and a tube having a hole communicating with the capillary at both sides of the capillary to which the packing is coupled, And the two pipes to be combined are screwed to each other to press the packing to seal between the capillary and the two pipes by the pressurized packing.

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