BALLOON-STYLE LIQUID MEDICINE INJECTOR

Description

BACKGROUND OF THE INVENTION1. Field of the Invention

[0001] The present invention relates to a balloon type liquid medicine injector for continuously inject a small amount of liquid medicine into a body of a patient, and more particularly, to a balloon type liquid medicine injector that is easily assembled and prevents an unnecessary dead space while being inflated after a liquid medicine is injected, so as to be miniaturized.2. Description of the Related Art

[0002] In general, liquid medicines such as antibiotics or painkillers are required to be continuously administered patients, who have undergone urgent surgery for cancer or leukemia or the like, to relieve pain as well as remove inflammation after the surgery.

[0003] Though there is a difference between patients, another urgent situation may occur to the patient when the liquid medicine is administered to the patient at an amount more than or less than an ##optimum amount.

[0004] Thus, separate injection devices are used to continuously inject a fine amount in order to solve the above problem. However, the above injection devices are quite expensive, occupy a lot of spaces, and are inconvenient when being carried, and accordingly the injection devices cannot be provided individually to a lot of patients.

[0005] Accordingly, recently, balloon-type liquid medicine injectors, which are usable as a personal type, portable and inexpensive and facilitate a continuous injection, are used.

[0006] A balloon type liquid medicine injector 100 currently used includes a tube body 110 inflated when filled with a liquid medicine to discharge the injected liquid medicine while returning to an initial position from the inflated state, as shown in FIG. 1. For the above-described operation of the tube body, a fixed tube having a flow path for the liquid medicine at a predetermined position therein is installed inside the tube body. In order to fix the tube body when the tube body surrounding the fixed tube is contracted and inflated, upper and lower ends of the fixed tube is fixed using a fixing mechanism from the outside of the tube body surrounding the fixed tube, so that the tube body is fixed while maintaining the airtightness between the fixed tube and the tube body.

[0007] Accordingly, when the upper and lower ends of the fixed tube are fixed using the fixing mechanism, the fixed tube or the fixing mechanism is used for the firm fixation by the fixing mechanism in a special scheme.

[0008] For example, in order to prevent the fixing mechanism from slipping when the tube body is inflated while being fixed by the fixing mechanism, a locking groove, for example, may be formed on an outer wall of the fixed tube, a slip prevention mechanism may be provided at the fixing mechanism slipping, or the fixing mechanism may be spaced apart from the upper and lower ends of the fixed tube at a predetermined distance.

[0009] According to the above using scheme, since the fixing mechanism is positioned and fixed at the portions spaced apart from the upper and lower ends of the fixed tube at the predetermined distance, a dead space eventually exists in the above portions in a state where a case used for protecting the tube body is combined.

[0010] In addition, the liquid medicine is injected into the fixed tube while the tube body is fixed by the fixing mechanism. In the above case, an injection mechanism for injecting the liquid medicine is mounted at one end of the fixed tube. In addition, the other end is provided with a stopper mechanism for maintaining the airtightness to allow the injected liquid medicine to inflate the tube body like a balloon while moving only to the flow path of the fixed tube, or allow the liquid medicine to be injected while returning to the initial position due to pressure of the inflated balloon.

[0011] However, another packing mechanism may be required to maintain the airtightness while fixing the injection mechanism or stopper mechanism to the fixed tube, and another defect or various difficulties may be generated due to the assembly and fixation using the packing mechanism. (Patent Document 1) KR10-1535947 B1 (Patent Document 2) KR10-1125478 B1 (Patent Document 3) KR10-1278492 B1

[0012] EP 0 426 319 A2 discloses a liquid infuser apparatus that includes an outer elastic bladder and an inner chemically inert bladder. All bladders are mounted as an elongated member and mounted within a spherical housing to enable it to expand naturally to maintain a constant pressure over the infusion period.US 4 227 293 A discloses a catheter having a flexible annular balloon secured on a shaft of the catheter by a pair of annular sleeves. A method is disclosed for securing the balloon to the shaft by shrinking the sleeves over grooves of the shaft.

[0013] KR 2017 0006510 A discloses a balloon infuser. More specifically, a balloon infuser comprising: an upper cover marked with a graduation mark including linear gradations; a lower cover fixed on a lower side of the upper cover; a flexible expansion member positioned in the upper cover and accommodating contents; and a rise and fall part rising and falling depending on the expanded degree of the expansion member, and including a gradation guide line at one side referring to the graduation mark.

[0014] WO 2015 / 136230 A1 discloses a cuffed tracheostomy tube with a sealing cuff attached to a shaft of the tube towards its patient end by a rear end collar bonded with the outside of the shaft. In one disclosure, the patient end collar is folded unattached around the patient end face of the shaft and is attached to the inside of the tube. When inflated, the cuff inflates slightly away from the patient end face to cushion the tip of the tube. In another disclosure, the cuff is formed integrally with the shaft. In a further disclosure, the cuff has an integral portion of a soft material that forms a patient end extension of the shaft.

[0015] US 2007 / 255209 A1 discloses a medical device that can be used as a feeding tube to provide nutrition or medication to a patient comprises a catheter, a stiffening tip, and an internal bolster.SUMMARY OF THE INVENTION

[0016] In accordance with the present invention, there is provided a balloon type liquid medicine injector as described in claim 1.

[0017] In addition, in a state where the both ends of the tube body are folded and inserted into the both ends of the fixed tube, an injection mechanism for injecting the liquid medicine or a stopper mechanism may be coupled while pressing the tube body folded inward, so that a separate packing may be unnecessary and the airtightness may be maintained.

[0018] In addition, with regard to the injection mechanism and the stopper mechanism, one tightening mechanism may be connected and fixed to the injection mechanism by passing through the stopper mechanism from the outside of the case using, so that the injection mechanism and the stopper mechanism may be fixed and the case may be fixed at once.

[0019] In addition, in order to prevent an occurrence of a residual liquid medicine because a step is generated due to the thickness of the tube body when the tube body is folded and inserted into both ends of the fixed tube, stepped surfaces may be provided inside the both ends of the fixed tube.

[0020] In addition, when the injection mechanism and the stopper mechanism are inserted inside the fixed tube, the insertion tubes may be formed to have predetermined lengths longer than a length of the folded tube body such that the injection mechanism or the stopper mechanism may be pressed in close contact with the folded and inserted tube body, and the injected liquid medicine may be transferred to the tube body , and the injection mechanism may be formed with an inwardly elongated insertion groove and formed at a tip thereof with a flow path hole so as to communicate with the flow path hole formed in the fixed tube.

[0021] In addition, a tip of the insertion tube may be formed with a helical portion to be tightened with the tightening mechanism, so as to be engaged with and fixed to a helical portion of the tightening mechanism.

[0022] In addition, a recess groove may be formed on a circumference having a flow path hole of the insertion tube, so as to be easily communicate with the flow path of the fixed tube when the liquid medicine is injected or discharged.

[0023] In addition, the injection mechanism and the stopper mechanism provided at one end of the insertion tube may have outer diameters larger than an outer diameter of the tube body when coupled to the fixed pipe, so as to seal the both ends of the fixed tube.

[0024] In addition, the injection mechanism may be formed with a flange, so that the fixed tube is closely coupled to the case by the flange when coupled to the case.

[0025] Thus, according to the present invention, the tube body positioned outside of the fixed tube covers the entire outer diameter of the fixed tube, and the tip of the tube body is mounted to be folded into the fixed tube, so that unnecessary dead space can be prevented from being generated inside the case when the tube body is contracted or inflated while covering the entire outer diameter of the fixed tube when the liquid medicine is filled, thereby minimizing the volume and weight, so that the compact liquid medicine injector can be provided.

[0026] In addition, according to the present invention, the residue, which is caused by a protrusion formed inside the mounting hole, of the expensive liquid medicine can be minimized, and a connecting tube can be mounted or assembled even when a flow hole and a connection hole of the fixed tube do not match in communication with each other.

[0027] In addition, according to the present invention, even when a flow path and a compartment formed inside the connecting tube are defined to have sizes different from each other, an insertion frame formed on an outer side can prevent a deformation due to a cooling speed difference during injection molding.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a view showing an appearance state of a conventional balloon-type liquid medicine injector. FIG. 2 is a perspective view showing an overall appearance of the present invention. FIG. 3 is a view showing a tube body mounted to a fixed tube according to one embodiment of the present invention. FIG. 4 is a view showing a tube body mounted to a fixed tube according to another embodiment of the present invention. FIG. 5 is a view showing an exposed surface of the tube body fixed by an injection mechanism and a stopper mechanism while being folded according to one embodiment of the present invention FIG. 6 is a view showing a state in which tips of the injection mechanism and the stopper mechanism of the present invention engaged with each other. FIG. 7 is a view showing a recess groove formed in the injection mechanism according to one embodiment of the present invention FIG. 8 is a view showing that ribs are provided on a cut-way groove according to one embodiment of the present invention. FIG. 9 is a sectional view of an assembled state of the present invention. FIGS. 10 and 11 are views showing a state in which the injected liquid medicine flows through a flow path hole of the fixed tube due to a recess groove according to one embodiment. FIG. 12 is a sectional view showing various sizes of the fixed tube and the tube body according to one embodiment. FIG. 13 is a sectional perspective view showing an assembled state of the present invention. FIG. 14 is a sectional view showing the tube body assembled using an injection mechanism and a stopper mechanism while being assembled to the fixed tube according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] First, the terms used in the specification and claims of the present invention should not be construed as limited to a lexical meaning, and should be construed as the meanings and concepts consistent with the technical idea of the present invention, based on the principle that "an inventor may define the concept of the term properly in order to describe the invention in the best way".

[0030] Accordingly, the embodiments described in the specification and the configurations shown in the drawings are merely preferred embodiments according to the present invention, and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modifications may be substituted therefor at the time of filing of the present application.

[0031] Hereinafter, the embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

[0032] FIG. 2 shows that a tube body constituting a balloon portion is mounted to a fixed tube in a liquid medicine injector according to the embodiment of the present invention. FIG. 3 show that a protrusion formed inside of the fixed tube in which both ends of the tube body are folded. FIG. 4 shows an assembling process of the balloon and the liquid medicine injector.

[0033] Referring to the above drawings, a liquid medicine injector 1 according to the embodiments of the present invention includes a hollow fixed tube 100 having a flow path hole in an outer wall thereof; a balloon portion 10 in which a clogged structure is formed in by a stopper mechanism at one end of the fixed tube in a state in which a hollow tube body 200 surrounding and coupled in close contact with an outer side of the fixed tube is mounted in close contact with the fixed tube, an injection mechanisms capable of injecting the liquid medicine is mounted at the other end to maintain airtightness at the both ends of the fixed tube, the liquid medicine inflates the tube body through the flow path hole of the fixed tube when the liquid medicine is injected by the injection mechanism, and the inflated tube body is contracted and the liquid medicine is injected through the flow path hole to inject the injected liquid medicine; and a case 20 for accommodate the balloon portion 10 as a whole, wherein the fixed tube 100 constituting the balloon portion 10 and the case 20 surrounding the balloon portion 10 may be generally injected or blow-molded using plastic in view of economic or handling feasibilities or the like, and the tube body 200 may be formed of silicone, plastic, or rubber that are harmless to a human body.

[0034] As shown in FIG. 4, according to the present invention, the tube body 200 is provided relatively longer than the length of the fixed tube 100, and the tube body 200 in the above state is coupled to surround the fixed tube 100, so that both ends of the tube body 200 further extend from both ends of the fixed tube 100 to constitute exposure ends 210.

[0035] The exposure ends 210 are folded and inserted into the fixed tube 100, thereby coming into close contact with an inner wall 101 of the fixed tube.

[0036] In addition, in a state where the exposure ends 210 of the both ends of the tube body 200 are folded and inserted into the both ends of the fixed tube 100, the injection mechanism 300 for injecting the liquid medicine or the stopper mechanism 400 is coupled while pressing the exposure ends of the tube body folded inward and coming into close contact with the inner wall of the fixed tube, so that a separate packing is unnecessary at the both ends of the fixed tube, thereby maintaining the airtightness in a state where the injection mechanism 300 or the stopper mechanism 400 is coupled.

[0037] Accordingly, since the tube body starts to swell from tips at the both ends of the fixed tube when the tube body surrounding the fixed tube is inflated, a dead space may not exist while being inserted inside the case.

[0038] In addition, in a state where the injection mechanism and the stopper mechanism are coupled to the both ends of the fixed tube, one tightening mechanism 500 is used to prevent an arbitrary separation to fix the case 20 and connect and fix the injection mechanism 300 and the stopper mechanism 400.

[0039] To this end, the tightening mechanism 500 is composed of a flange 510 and a tightening shaft 520, a helical portion 521 is formed at a tip of the tightening shaft 520, and an insertion hole 21, to which the tightening shaft 520 is inserted, is formed at one end of the case 20. Thus, the tightening shaft 520 of the tightening mechanism 500 is inserted through the insertion hole 21 to pass through the stopper mechanism 400 so as to be connected and fixed to the injection mechanism 300, so that the injection mechanism and the stopper mechanism can be fixed and the case can be fixed at once.

[0040] When the injection mechanism 300 and the stopper mechanism 400 are coupled to the both ends of the fixed tube 100, insertion tubes 310 and 410 are formed to have a predetermined length longer than lengths of the exposure ends 210 of the folded tube body, such that the injection mechanism or the stopper mechanism may be pressed in close contact with the tube body folded and inserted into the both ends of the fixed tube and the injected liquid medicine may be transferred to the tube body, and the insertion tube 310 of the injection mechanism is formed therein with an inwardly elongated insertion groove 311 and formed at a tip thereof with a flow path hole 312 so as to communicate with the flow path hole 110 formed in the fixed tube 100.

[0041] It is an advantage that the flow path hole 110 of the fixed tube and the flow path hole 312 formed at the tip of the insertion groove of the insertion tube may be positioned on the same line, such that the injection and outflow of the liquid medicine can be facilitated.

[0042] In addition, a tip of the insertion tube 310 is formed therein with a helical groove 320 having a helical portion 321 so as to be engaged and fixed with the helical portion 521 provided at the tip of the tightening shaft 520 of the tightening mechanism.

[0043] The stopper mechanism 400 is also formed with the insertion tube 410, the insertion tube 410 is also formed longer than the folded exposure end 210, and a through-hole 411 is formed inside the insertion tube 410, so that the tightening shaft 520 of the tightening mechanism is inserted into the helical groove 320 of the injection mechanism 300 while passing through the insertion tube 410, engaged with the helical portion 321, and connected and coupled to the stopper mechanism 400 and the injection mechanism 300, thereby being fixed to the fixed tube while maintaining the airtightness.

[0044] In addition, the injection mechanism and the stopper mechanism are provided with cover portions 330 and 420 capable of blocking the both ends of the fixed tube in a state in which the insertion tubes 310 and 410 having predetermined lengths are provided, respectively, and outer diameters of the cover portions 330 and 420 are formed to be larger than an outer diameter of the coupled tube body 200 while surrounding the fixed tube 100 so as to seal the both ends of the fixed tube 100 surrounded by the tube body.

[0045] In other words, when tightened and fixed by the tightening mechanism 500 as described above, pressing frames 331 and 421 of the cover portions 330 and 420 having larger diameters than the insertion tubes 310 and 410 pressurize exposed edges 211 of the exposure ends 210, respectively, while being folded and inserted into the both ends of the fixed tube and coming into close contact with the inner wall of the fixed tube, so that the airtightness between the fixed tube and the tube body may be maintained.

[0046] In addition, a recess groove 313 is formed on a circumference having the flow path hole 312 at the tip of the insertion tube 310, so that the liquid medicine may be easily discharged to the flow path 110 of the fixed tube 100 through the recess groove 313 in the case of injection or discharge of the liquid medicine, even when the flow path hole 312 of the insertion tube and the flow path hole 110 of the fixed tube are arranged not to communicate with each other, that is, even when arranged offset.

[0047] In addition, in order to prevent the case of generating a residual liquid medicine because a step protrudes from the inner wall of the fixed tube due to the thickness of the tube body when the exposure ends 210 of the tube body are folded inside the both ends of the fixed tube 100 and come into close contact with the inner wall of the fixed tube 100, stepped surfaces 120 are provided inside the both ends of the fixed tube 100, such that the exposure ends 210 of the tube body are placed on the exposed stepped surfaces 120 while being folded inward to form a horizontal level.

[0048] To this end, the depth of the stepped surface corresponds to the thickness of the exposure end.

[0049] In addition, in the state that the flow path hole is formed in the recess groove at the tip of the insertion tube, a cut-way groove 340 is formed at a rear side thereof to prevent the insertion tube from being deformed during injection molding, in which ribs 341 are formed at regular intervals to minimize the residue due to the cut-way groove 340.

[0050] In addition, when the balloon portion 10 is inserted and fixedly coupled to the case 20, a flange 332 extending outward is formed at the cover portion 330 of the injection mechanism of the fixed tube of the balloon portion 10, and one side of the case is provided with a mount frame 22 to allow the flange 332 to be seated thereon, the other side of the case is formed with the insertion hole 21 as described above, and a seating portion is formed to be mounted thereon with the flange of the tightening mechanism when the case is tightened by the tightening mechanism 500, thereby preventing a portion latched outward on the case while being coupled.

[0051] The present invention has been described with reference to the accompanying drawings, but the descriptions are merely exemplary illustrations and it will be understood by those skilled in the art that various changes and modifications may be made based on the doctrine of equivalents. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims

1. A balloon type liquid medicine injector comprising: a case (20); a balloon portion (10), wherein the case (20) is configured to accommodate the balloon portion (10) as a whole, the balloon portion (10) being configured to be inserted and fixedly coupled to the case (20); a hollow fixed tube (100) constituting the balloon portion (10) and the case (20) surrounding the balloon portion, and is formed in an outer wall thereof with a flow path hole (110); and a tube body (200) extending longer than a length of the fixed tube (100), the tube body (200) is configured to be coupled to surround the fixed tube (100), wherein both ends of the tube body (200) further extend from both ends of the fixed tube (100) to form exposure ends (210), and characterised in that the exposure ends (210) are folded inward of the fixed tube (100), and thereby are in close contact with an inner wall (101) of the fixed tube, so as to form the balloon portion (10), wherein an injection mechanism (300) and a stopper mechanism (400) are mounted to the exposure ends, respectively, wherein, there is provided a tightening mechanism (500) composed of a flange (510) and a tightening shaft (520), and wherein a helical portion (521) is formed at a tip of the tightening shaft (520), and an insertion hole (21), into which the tightening shaft (520) is inserted, is formed at one end of the case (20), wherein the tightening shaft (520) of the tightening mechanism (500) is inserted through the insertion hole (21) to pass through the stopper mechanism (400) so as to be connected and fixed to the injection mechanism (300), so that the injection mechanism (300) and the stopper mechanism (300) can be fixed and the case (20) can be fixed at once, wherein, when the injection mechanism (300) and the stopper mechanism (400) are coupled to the both ends of the fixed tube (100), insertion tubes (310) and (410) are formed to have a predetermined length longer than lengths of the exposure ends (210) of the folded tube body, such that the injection mechanism or the stopper mechanism are pressed in close contact with the tube body folded and inserted into the both ends of the fixed tube (100), the injected liquid medicine is transferrable to the tube body, and the insertion tube (310) of the injection mechanism is formed therein with an inwardly elongated insertion groove (311) and formed at a tip thereof with a flow path hole (312) so as to communicate with the flow path hole (110) formed in the fixed tube (100), and the injection mechanism (300) and the stopper mechanism (400) are provided with cover portions (330 and 420) capable of blocking the both ends of the fixed tube (100) in a state in which the insertion tubes (310 and 410) having predetermined lengths are provided, respectively, and outer diameters of the cover portions (330 and 420) are formed to be larger than an outer diameter of the coupled tube body (200) while surrounding the fixed tube (100) so as to seal the both ends of the fixed tube (100) surrounded by the tube body (200).

2. The balloon type liquid medicine injector of claim 1, wherein, in a state where the exposure ends (210) of the both ends of the tube body (200) are folded and inserted into the both ends of the fixed tube (100), the injection mechanism (300) for injecting the liquid medicine or the stopper mechanism (400) is coupled while pressing the exposure ends of the tube body folded inward and coming into close contact with the inner wall of the fixed tube, so that a separate packing is unnecessary at the both ends of the fixed tube, thereby maintaining the airtightness in a state where the injection mechanism (300) or the stopper mechanism (400) is coupled.

3. The balloon type liquid medicine injector of claim 1, wherein the flow path hole (110) of the fixed tube and the flow path hole (312) formed at the tip of the insertion groove of the insertion tube are positioned on a same line, a recess groove (313) is formed on a circumference having the flow path hole (312) at the tip of the insertion tube (310), so that the liquid medicine is easily discharged to the flow path (110) of the fixed tube (100) through the recess groove (313) when the liquid medicine is injected or discharged even when the flow path hole (312) of the insertion tube and the flow path hole (110) of the fixed tube are arranged not to communicate with each other, that is, even when arranged offset.

4. The balloon type liquid medicine injector of claim 3, wherein a tip of the insertion tube (310) is formed therein with a helical groove (320) having a helical portion (321) so as to be engaged and fixed with the helical portion (521) provided at the tip of the tightening shaft (520) of the tightening mechanism, so as to be engaged with and fixed to the helical portion (521) formed at the tip of the tightening shaft (520) of the tightening mechanism (500).

5. The balloon type liquid medicine injector of claim 1, wherein the stopper mechanism (400) is formed with the insertion tube (410), the insertion tube (410) is formed longer than the folded exposure end (210), and a through-hole (411) is formed inside the insertion tube (410), so that the tightening shaft (520) of the tightening mechanism is inserted into the helical groove (320) of the injection mechanism (300) while passing therethrough, engaged with the helical portion (321), and connected and coupled to the stopper mechanism (400) and the injection mechanism (300), thereby being fixed to the fixed tube to maintain airtightness.

6. The balloon type liquid medicine injector of claim 1, wherein, in order to prevent the case of generating a residual liquid medicine because a step protrudes from the inner wall of the fixed tube due to the thickness of the tube body when the exposure ends (210) of the tube body are folded inside the both ends of the fixed tube (100) and come into close contact with the inner wall of the fixed tube (100), stepped surfaces (120) are provided inside the both ends of the fixed tube (100), such that the exposure ends (210) of the tube body are placed on the exposed stepped surfaces (120) while being folded inward to form a horizontal level.

7. The balloon type liquid medicine injector of claim 3, wherein, in the state that the flow path hole is formed in the recess groove at the tip of the insertion tube, a cut-way groove (340) is formed at a rear side thereof so as to prevent the insertion tube from being deformed during injection molding.

8. The balloon type liquid medicine injector of claim 7, wherein ribs (341) are formed at regular intervals to minimize the residue due to the cut-way groove (340).

9. The balloon type liquid medicine injector of claim 1, wherein, when the balloon portion (10) is inserted and fixedly coupled to the case (20), a flange (332) extending outward is formed at the cover portion (330) of the injection mechanism of the fixed tube of the balloon portion (10), and one side of the case is provided with a mount frame (22) to allow the flange (332) to be mounted thereon, and a seating portion is formed to mounted thereon with the flange of the tightening mechanism when the case is tightened by the tightening mechanism (500) in a state in which the other side of the case is formed with an insertion hole (21), thereby preventing a portion latched outward on the case while being coupled.