JP2023112323A - injection device - Google Patents

Abstract

To provide a connector capable of injecting a nutritional supplement into the stomach through a tube by executing a simple operation to retreat or advance a plunger inserted into an external cylinder of a syringe.SOLUTION: In a connector 1 of the present invention, when a plunger 6 is retreated and the inside 10a of a connector body 10 is decompressed, a first on-off valve 14 is brought into a state in which a first inflow port 16 is opened, and a second on-off valve 15 is brought into a state in which a first discharge port 17 is closed. The decompression allows a nutritional supplement 2 to flow into the inside 10a of the connector body 10. When the plunger 6 is advanced and the inside 10a of the connector body 10 is pressurized, the first on-off valve 14 is brought into a state in which the first inflow port 16 is opened, and the second on-off valve 15 is brought into a state in which the first discharge port 17 is closed. The pressurization allows the nutritional supplement 2 present in the inside 10a of the connector body 10 to be guided into the tube 4.SELECTED DRAWING: Figure 3

Description

The present invention relates to connectors and injection devices used to inject nutrients into the human stomach.

Conventionally, using a syringe with a plunger inserted into an outer cylinder as disclosed in Patent Documents 1 and 2, a work called enteral nutrition (a nutrient such as a liquid diet is introduced into the stomach through a gastrostomy tube). work) is being carried out. In this type of work, the following steps 1-5 are repeated until a sufficient amount of nutrient has been injected into the stomach.

Step 1: With the nozzle of the outer cylinder immersed in the nutrient contained in the bowl, the plunger is retracted to suck up the nutrient into the outer cylinder.
Step 2: Rinse the nutrient adhering to the nozzle of the outer cylinder with water or wipe it with a cloth.
Step 3: Connect the nozzle of the outer cylinder to the gastrostomy tube.
Step 4: By advancing the plunger and pressurizing the inside of the outer cylinder, the nutrient inside the outer cylinder is sent to the gastrostomy tube.
Step 5: Remove the nozzle of the outer cylinder from the gastrostomy tube.

JP-A-2002-272843 Japanese Patent Application Laid-Open No. 2003-199828

However, in conventional formula nutrition, every time the above steps 1 to 5 are repeated, step 3 "connect the nozzle to the gastric fistula tube" or step 5 "connect the nozzle of the outer cylinder from the gastric fistula tube. You have to do 'remove'. For this reason, a great deal of time and effort is required, and there has been a problem that a worker (nurse, etc.) who administers the nutritional formula hurts his/her wrist. Further, when the nozzle and the gastrostomy tube are connected by a screw, there is also a problem that steps 3 and 5 are difficult to implement due to the nutrient entering the screw groove.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an injection device for injecting nutrients into the stomach of a human body through a tube by the action of a plunger inserted into an outer cylinder of a syringe. A connector that can inject nutrients into the stomach through the tube by simply moving the plunger backward and forward while the connector is connected to the tube and the suction/discharge nozzle of the outer cylinder. and to provide an injection device with the connector.

To achieve the above objectives, the present invention includes the subject matter described in the following sections.

Section 1. A connector provided in an injection device capable of injecting a nutrient into the stomach of a human body through a tube by operating a plunger inserted into the outer cylinder of the syringe,
a box-shaped connector body;
a first nozzle formed with a first inlet for allowing the nutrient to flow into the connector body;
A first ejection port for ejecting the nutrient present inside the connector body is formed and connected to the tube, whereby the nutrient ejected from the first ejection port can be guided to the tube. a possible second nozzle;
a third nozzle that connects the inside of the connector body and the inside of the outer cylinder of the syringe by being connected to an intake/discharge nozzle formed at the tip of the outer cylinder;
a first on-off valve for opening and closing the first inlet;
A second on-off valve for opening and closing the first outlet,
By retracting the plunger to reduce the pressure inside the connector body, the first on-off valve opens the first inlet and the second on-off valve closes the first outlet. As a result, the reduced pressure allows the nutrient to flow into the first nozzle, pass through the first inlet and into the connector body, and advance the plunger. By pressurizing the inside of the connector main body, the first on-off valve opens the first inlet and the second on-off valve closes the first discharge port. A connector, wherein the nutrient present inside the connector body can be guided into the tube by pressure through the first outlet and the second nozzle.

Section 2. The first nozzle includes a first tubular portion, a first bottom plate portion, a second tubular portion, and a third tubular portion,
The first cylindrical portion is provided so as to protrude from the first bottom plate portion, the first bottom plate portion constitutes a bottom, the first inlet is formed in the first bottom plate portion,
The second tubular portion is provided so as to protrude from the first bottom plate portion to the opposite side of the first tubular portion, and the inside of the second tubular portion communicates with the first inlet. and
The third tubular portion is provided so as to protrude from the outer wall of the connector main body, and the bottom of the third tubular portion is configured by the outer wall of the connector main body. The bottom is formed with a second inlet that communicates with the inside of the connector body,
The first on-off valve includes a first annular body, a first flap having a diameter larger than that of the first inlet and arranged inside the first annular body, and an inner circumference of the first annular body. and a first connecting portion that connects a portion of the outer periphery of the first flap, the first on-off valve being placed in the first cylindrical portion, and the first flap being the By inserting the third tubular portion into the first tubular portion with the first annular body placed on the first bottom plate portion so as to cover the first inlet, the first an annular body is sandwiched between the first bottom plate portion and the tip of the third cylindrical portion;
By retracting the plunger and decompressing the inside of the connector body, the first flap tilts into the third cylindrical portion to open the first inlet, and the decompression causes the nutrient to flow into the second Flowing into the second tubular portion from the tip opening of the tubular portion, passing through the first inlet, the third tubular portion, and the second inlet to flow into the connector body. By advancing the plunger and pressurizing the inside of the connector body, the outer peripheral edge of the first flap is pressed against the first bottom plate portion and the first flap closes the first inlet Item 1. The connector according to Item 1, which is in a state where

Item 3. Item 3. The connector according to Item 2, wherein the first tubular portion is attached to the third tubular portion so that the third tubular portion can be inserted into and removed from the first tubular portion.

Section 4. The second nozzle includes a fourth tubular portion, a second bottom plate portion, a fifth tubular portion, and a sixth tubular portion,
The fourth tubular portion is provided so as to protrude from the second bottom plate portion, the second bottom plate portion forms a bottom, and the second bottom plate portion is formed with a second outlet,
The fifth tubular portion is provided so as to protrude from the second bottom plate portion to the opposite side of the fourth tubular portion, and the inside of the fifth tubular portion communicates with the second discharge port. and the tube is connected to the fifth tubular portion,
The sixth cylindrical portion is provided so as to protrude from the outer wall of the connector body, and the outer wall of the connector body constitutes a bottom, and the bottom of the sixth cylindrical portion defines the interior of the connector body. The communicating first discharge port is formed,
The second on-off valve includes a second annular body, a second flap having a diameter larger than that of the first discharge port and arranged inside the second annular body, and a valve inside the second annular body. and a second connecting portion that connects a part of the circumference and a part of the outer circumference of the second flap, the second on-off valve being put in the sixth cylindrical part, and the second flap The fourth tubular portion is inserted into the sixth tubular portion while the second annular body is placed on the bottom of the sixth tubular portion so as to cover the first discharge port. and the second annular body is sandwiched between the bottom of the sixth bottom-shaped portion and the tip of the fourth cylindrical portion,
By retracting the plunger and decompressing the inside of the connector body, the outer peripheral edge of the second flap was pressed against the bottom of the sixth tubular portion, and the second flap closed the first discharge port. By advancing the plunger and pressurizing the inside of the connector body, the second flap tilts into the fourth cylindrical portion to open the first discharge port, and the pressurization is performed. by passing the nutrient present inside the connector body through the first outlet, the fourth tubular portion, the second outlet, and the fifth tubular portion, and leading it into the tube. 4. The connector according to any one of items 1 to 3, wherein

Item 5. Item 5. The connector according to Item 4, wherein the fourth tubular portion is attached to the sixth tubular portion so that the fourth tubular portion can be inserted into and removed from the sixth tubular portion.

Item 6. An injection device for injecting a nutrient into the stomach of a human body,
Item 6. The connector according to any one of Items 1 to 5;
the tube;
An injection device comprising the barrel and the syringe comprising the plunger.

Item 7. the third nozzle includes a seventh tubular portion, an eighth tubular portion, and a ninth tubular portion,
The seventh tubular portion is provided so as to protrude from the outer wall of the connector main body, and the bottom of the seventh tubular portion is constituted by the outer wall of the connector main body. The first suction/discharge port communicating with the inside of the connector body is formed on the bottom,
The ninth cylindrical portion has a large-diameter portion on one end side and a small-diameter portion on the other end side, and the one end side of the eighth cylindrical portion passes through the inside of the large-diameter portion. arranged such that the small diameter portion is connected to the outer wall of the eighth tubular portion,
The suction/discharge nozzle is provided so as to protrude from the front end wall of the outer cylinder, the bottom of the suction/discharge nozzle is constituted by the front end wall of the outer cylinder, and the bottom of the suction/discharge nozzle is provided with the outer cylinder. A second suction/discharge port is formed that communicates with the inside of the
The third nozzle is connected to the suction/discharge nozzle so that the suction/discharge nozzle is inserted between one end of the eighth cylindrical portion and the large diameter portion of the ninth cylindrical portion, and By attaching the eighth tubular portion to the seventh tubular portion such that the other end side of the eighth tubular portion is inserted into the seventh tubular portion, the inner portion of the connector and the outer cylinder are connected. The inside communicates with the inside of the connector through the first suction/discharge port, the inside of the eighth cylindrical portion, the inside of the suction/discharge nozzle, and the second suction/discharge port, and the plunger retreats to decompress the inside of the connector. 7. An injection device according to clause 6, wherein advancement of the plunger is capable of pressurizing the interior of the connector.

Item 8. The third nozzle is connected to the suction/discharge nozzle so that the suction/discharge nozzle can be inserted/removed between one end of the eighth cylindrical portion and the large diameter portion of the eighth cylindrical portion. Item 8. The injection device according to Item 7.

Item 9. Item 9. The injection device according to Item 7 or 8, wherein the eighth tubular portion is attached to the seventh tubular portion so that the other end side of the eighth tubular portion can be inserted into and removed from the seventh tubular portion.

According to the present invention, the nutrient can be injected into the stomach through the tube by simply moving the plunger backward and forward while the connector is connected to the tube and the suction/discharge nozzle of the outer cylinder.

1 is a perspective view of an injection device with a connector according to an embodiment of the invention; FIG. Fig. 2 is a side view showing the state of the injection device in use according to the embodiment of the present invention; FIG. 4 is a cross-sectional view showing the operation of the injection device according to the embodiment of the present invention, where (A) shows the state when the nutrient is flowing into the connector main body, and (B) shows the inside of the connector main body. This shows the state when the nutrient present in the is being discharged. 1 is a perspective view showing an exploded state of an injection device according to an embodiment of the present invention; FIG. FIG. 4 is a perspective view showing the connector in which the first nozzle is disassembled, (A) showing the state before the first on-off valve is inserted into the first tubular portion, and (B) showing the first on-off valve is inserted into the first tubular portion. FIG. 10 is a perspective view showing the connector in which the second nozzle is disassembled, (A) showing the state before the second on-off valve is inserted into the sixth tubular portion, and (B) showing the second on-off valve is placed in the sixth cylindrical portion. It is a perspective view which shows the state which looked at the connector from the side in which the 3rd nozzle was provided. FIG. 4 is a perspective view showing a state in which the syringe is viewed from the side on which the suction/discharge nozzle is provided;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an injection device 3 with a connector 1 according to an embodiment of the invention. FIG. 2 is a side view showing the state of use of the injection device 3 according to the embodiment of the present invention. 3A and 3B are cross-sectional views showing the operation of the injection device 3 according to the embodiment of the present invention, and FIG. FIG. 3(B) shows the state when the nutrient 2 existing inside the connector body 10 is being discharged.

A connector 1 according to an embodiment of the present invention is provided in an injection device 3 used for injecting a nutrient 2 into the human stomach. The nutritional supplement 2 is not particularly limited, but is, for example, a liquid diet (food material having fluidity).

The injection device 3 comprises the connector 1 described above, a tube 4 and a syringe 7 . The syringe 7 includes an outer cylinder 5 and a plunger 6 inserted into the outer cylinder 5. The injection device 3 operates the plunger 6 (specifically, retracts and advances the plunger 6). ), the nutrient 2 can be injected into the human stomach through the tube 4 .

The tube 4 is passed through a hole made in the human body so that the nutrient 2 that has passed through the tube 4 can be supplied to the stomach. By connecting the tube 4 to a catheter passed through a hole made in the human body, the nutrient 2 passing through the tube 4 may be supplied to the stomach via the catheter.

A suction/discharge nozzle 8 is provided at the tip of the outer cylinder 5 of the syringe 7. The plunger 6 is inserted into the outer cylinder 5 from an opening at the proximal end of the outer cylinder 5, and the operator moves the plunger 6 forward. and retractable. Note that "advancing the plunger 6" means "moving the plunger 6 to the side where the suction/discharge nozzle 8 is provided (the tip side of the outer cylinder 5)" (FIG. (shows the state when it is turned on). "Retreating the plunger 6" means "moving the plunger 6 to the side where the suction/discharge nozzle 8 is not provided (the base end side of the outer cylinder 5)" (Fig. 3(A) shows the plunger 6 (shows the state when it is retracted). The syringe 7 and tube 4 can be formed using materials similar to those used in conventional formula feeding, respectively.

The connector 1 includes a box-shaped connector body 10 , a first nozzle 11 , a second nozzle 12 , a third nozzle 13 , a first on-off valve 14 and a second on-off valve 15 . Members constituting the connector main body 10, the first nozzle 11, the second nozzle 12, and the third nozzle 13 are made of, for example, resin, and ABS resin, for example, can be used as the resin. Members constituting the first on-off valve 14 and the second on-off valve 15 are made of a flexible material, and for example, polypropylene can be used as the flexible material.

The first nozzle 11 is formed with a first inlet 16 for allowing the nutrient 2 to flow into the interior 10 a of the connector body 10 . The second nozzle 12 is formed with a first ejection port 17 for ejecting the nutrient 2 present in the interior 10 a of the connector body 10 . The second nozzle 12 is connected to the tube 4 and can guide the nutrient 2 ejected from the first ejection port 17 to the tube 4 . The third nozzle 13 is connected to the intake/discharge nozzle 8 of the outer cylinder 5 to allow the interior 10a of the connector body 10 and the interior 5a of the outer cylinder 5 of the syringe 7 to communicate with each other. The first on-off valve 14 is provided to open and close the first inlet 16 . The second on-off valve 15 is provided to open and close the first discharge port 17 . The “inside 5 a of the outer cylinder 5 of the syringe 7 ” means the inner space of the outer cylinder 5 surrounded by the outer cylinder 5 and the tip of the plunger 6 . When a gasket is provided at the tip of the plunger 6, the "inside 5a of the outer cylinder 5 of the syringe 7" corresponds to the inner space of the outer cylinder 5 surrounded by the outer cylinder 5 and the gasket.

When the injection device 3 is used, the first nozzle 11 is immersed in the nutrient 2 stored in the bowl 18, as shown in FIG. In this state, the plunger 6 is retracted to decompress the inside 10a of the connector body 10, so that the first on-off valve 14 opens the first inlet 16 and the second on-off valve 15 opens the first discharge port. 17 is closed, the nutrient 2 in the bowl 18 flows into the first nozzle 11 and flows into the interior 10a of the connector main body 10 through the first inlet 16 due to the pressure reduction described above. (Fig. 3(A)). By advancing the plunger 6 and pressurizing the inside 10 a of the connector body 10 , the first on-off valve 14 closes the first inlet 16 and the second on-off valve 15 closes the first discharge port 17 . It becomes an open state (Fig. 3(B)). As a result, the nutrient 2 present in the interior 10a of the connector body 10 is guided into the tube 4 through the first discharge port 17 and the second nozzle 12 by the pressurization.

The detailed structure and function of the injection device 3 will be described below.

FIG. 4 is a perspective view showing an exploded state of the injection device 3 according to the embodiment of the present invention. FIG. 5 is a perspective view showing the connector 1 with the first nozzle 11 disassembled, and FIG. FIG. 5B shows a state in which the first on-off valve 14 is placed inside the first cylindrical portion 20. FIG.

The first nozzle 11 includes a first tubular portion 20 , a first bottom plate portion 21 , a second tubular portion 22 and a third tubular portion 23 .

The first tubular portion 20 is provided so as to protrude from the first bottom plate portion 21 . The bottom of the first tubular portion 20 is formed by the first bottom plate portion 21 , and the first inlet 16 is formed in the first bottom plate portion 21 so as to penetrate the first bottom plate portion 21 .

The second tubular portion 22 is provided so as to protrude from the first bottom plate portion 21 to the opposite side of the first tubular portion 20 . The inside of the second tubular portion 22 communicates with the first inlet 16 (FIG. 3). When the injection device 3 is used, the second tubular portion 22 is immersed in the nutrient 2 stored in the bowl 18 (Fig. 2).

The third tubular portion 23 is provided so as to protrude from the outer wall 24 of the connector main body 10 . The bottom of the third tubular portion 23 is formed by the outer wall 24 of the connector main body 10 , and the second inlet 25 is formed in the bottom of the third tubular portion 23 . The second inlet 25 communicates with the interior 10a of the connector body 10 (Fig. 3).

The first on-off valve 14 includes a first annular body 30, a first flap 31, and a first connecting portion 32 (Fig. 5). The first flap 31 has a larger diameter than the first inlet 16 and is provided inside the first annular body 30 . The first connecting portion 32 connects part of the inner circumference of the first annular body 30 and part of the outer circumference of the first flap 31 . When polypropylene is used as the flexible material forming the first on-off valve 14, the thickness of the first on-off valve 14 is, for example, about 0.2 mm.

When assembling the injection device 3 , the first on-off valve 14 is inserted into the first tubular portion 20 and the first annular body is attached to the first bottom plate portion 21 so that the first flap 31 covers the first inlet 16 . 30 is placed (FIG. 5(B)). In this state, the third tubular portion 23 is inserted into the first tubular portion 20, so that the first annular body 30 is sandwiched between the first bottom plate portion 21 and the third tubular portion 23. (Fig. 3).

In this embodiment, the third tubular portion 23 is attached to the third tubular portion 23 so that the third tubular portion 23 can be inserted into and removed from the first tubular portion 20 (that is, the third tubular portion 23 A female screw 33 (FIG. 5) is formed on the inner peripheral surface of the first tubular portion 20 (for attaching the first tubular portion 20 to the connector body 10 so that the first tubular portion 20 can be inserted into and removed from the first tubular portion 20). A male screw 34 ( FIG. 5 ) is formed on the outer peripheral surface of the third tubular portion 23 . When inserting the third tubular portion 23 into the first tubular portion 20 , the first tubular portion 20 is attached to the third tubular portion 23 by screwing the female screw 33 and the male screw 34 together. attached (that is, the first tubular portion 20 is attached to the connector body 10). By releasing the engagement between the female screw 33 and the male screw 34, the third tubular portion 23 is pulled out from the first tubular portion 20, and the first tubular portion 20 is removed from the third tubular portion 23. It is removed (that is, the first tubular portion 20 is removed from the connector main body 10).

The method of attaching the first tubular portion 20 to the third tubular portion 23 so that the third tubular portion 23 can be inserted into and removed from the first tubular portion 20 is not limited to the above method. For example, one of the inner peripheral surface of the first tubular portion 20 and the outer peripheral surface of the third tubular portion 23 may be provided with a convex portion and the other may be provided with a concave portion that engages with the convex portion. good. In this case, when the third tubular portion 23 is inserted into the first tubular portion 20, the first tubular portion 20 is inserted into the third tubular portion 23 by engaging the convex portion and the concave portion. (that is, the first tubular portion 20 is attached to the connector body 10). When removing the third tubular portion 23 from the first tubular portion 20, the first tubular portion 20 is removed from the third tubular portion 23 by releasing the engagement between the convex portion and the concave portion. (That is, the first tubular portion 20 is removed from the connector main body 10).

FIG. 6 is a perspective view showing the connector 1 with the second nozzle 12 disassembled, and FIG. FIG. 6B shows a state in which the second on-off valve 15 is placed inside the sixth cylindrical portion 43. FIG.

The second nozzle 12 includes a fourth tubular portion 40 , a second bottom plate portion 41 , a fifth tubular portion 42 ( FIGS. 1 to 4 ), and a sixth tubular portion 43 .

The fourth tubular portion 40 is provided so as to protrude from the second bottom plate portion 41 . The bottom of the fourth tubular portion 40 is configured by a second bottom plate portion 41 , and a second discharge port 44 is formed in the second bottom plate portion 41 .

The fifth tubular portion 42 is provided so as to protrude from the second bottom plate portion 41 to the opposite side of the fourth tubular portion 40 . The inside of the fifth tubular portion 42 communicates with the second discharge port 44 (FIG. 3). The tube 4 is connected to the fifth tubular portion 42 (FIGS. 1-4).

The sixth tubular portion 43 is provided so as to protrude from the outer wall 24 of the connector main body 10 . The bottom of the sixth tubular portion 43 is formed by the outer wall 24 of the connector main body 10 , and the bottom of the sixth tubular portion 43 is formed with the first discharge port 17 . The first outlet 17 communicates with the interior 10a of the connector body 10 (Fig. 3).

The second on-off valve 15 (Fig. 6) has a structure similar to that of the first on-off valve 14 (Fig. 5), and comprises a second annular body 50, a second flap 51, and a second connecting portion 52. Prepare. The second flap 51 is formed to have a larger diameter than the first discharge port 17 and is provided inside the second annular body 50 . The second connecting portion 52 connects part of the inner circumference of the second annular body 50 and part of the outer circumference of the second flap 51 . When polypropylene is used as the flexible material forming the second on-off valve 15, the thickness of the second on-off valve 15 is, for example, about 0.2 mm.

When assembling the injection device 3, the second on-off valve 15 is inserted into the sixth tubular portion 43, and the bottom of the sixth tubular portion 43 is closed so that the second flap 51 covers the first discharge port 17. , the second annular body 50 is placed on (FIG. 6(B)). By inserting the fourth tubular portion 40 into the sixth tubular portion 43 in this state, the second annular body 50 forms the bottom of the sixth tubular portion 43 and the outer wall 24 of the connector main body 10 forms the bottom of the fourth tubular portion 43 . It is in a state of being sandwiched between the tip of the tubular portion 40 (FIG. 3).

In this embodiment, the fourth tubular portion 40 is attached to the sixth tubular portion 43 so that the fourth tubular portion 40 can be inserted into and removed from the sixth tubular portion 43 (that is, the fourth tubular portion 40 to the connector body 10), a male screw 53 (FIG. 6) is formed on the outer peripheral surface of the fourth tubular portion 40, and a female screw 54 (FIG. 6) is formed on the inner peripheral surface of the sixth tubular portion 43. It is formed. When inserting the fourth tubular portion 40 into the sixth tubular portion 43 , the fourth tubular portion 40 is inserted into the sixth tubular portion 43 by screwing the male screw 53 and the female screw 54 together. attached (that is, the fourth tubular portion 40 is attached to the connector body 10). By releasing the engagement between the male screw 53 and the female screw 54, the third tubular portion 23 is pulled out from the first tubular portion 20, and the fourth tubular portion 40 is removed from the sixth tubular portion 43. It is removed (that is, the fourth tubular portion 40 is removed from the connector main body 10).

The method of attaching the fourth tubular portion 40 to the sixth tubular portion 43 so that the fourth tubular portion 40 can be inserted into and removed from the sixth tubular portion 43 is not limited to the above. For example, one of the outer peripheral surface of the fourth cylindrical portion 40 and the inner peripheral surface of the sixth cylindrical portion 43 may be formed with a convex portion and the other may be formed with a concave portion that engages with the convex portion. good. In this case, when the fourth tubular portion 40 is inserted into the sixth tubular portion 43 , the fourth tubular portion 40 is inserted into the sixth tubular portion 43 by engaging the above-described convex portion with the concave portion. (the fourth tubular portion 40 is attached to the connector main body 10). When the fourth tubular portion 40 is pulled out from the sixth tubular portion 43, the fourth tubular portion 40 is removed from the sixth tubular portion 43 by releasing the engagement between the convex portion and the concave portion. .

FIG. 7 is a perspective view showing a state in which the connector 1 is viewed from the side on which the third nozzle 13 is provided.

The third nozzle 13 includes a seventh tubular portion 60 , an eighth tubular portion 61 and a ninth tubular portion 62 .

The seventh tubular portion 60 is provided so as to protrude from the outer wall 24 of the connector body 10 . The bottom of the seventh cylindrical portion 60 is formed by the outer wall 24 of the connector main body 10, and the bottom of the seventh cylindrical portion 60 is formed with a first suction/discharge port 63 (FIG. 3). The first suction/discharge port 63 communicates with the interior 10 a of the connector body 10 .

The ninth cylindrical portion 62 has a large diameter portion 64 on one end and a small diameter portion 65 on the other end (FIGS. 3 and 4). The ninth tubular portion 62 is arranged such that one end side of the eighth tubular portion 61 passes inside the large diameter portion 64 , and the small diameter portion 65 is connected to the outer wall of the eighth tubular portion 61 . This connection is realized by, for example, welding the small diameter portion 65 and the outer wall of the eighth tubular portion 61 .

FIG. 8 is a perspective view showing a state in which the syringe 7 is viewed from the side where the suction/discharge nozzle 8 is provided (the tip side of the outer cylinder 5).

The suction/discharge nozzle 8 is provided so as to protrude from the tip wall 70 of the outer cylinder 5 . The bottom of the suction/discharge nozzle 8 is formed by the tip wall 70 of the outer cylinder 5 , and a second suction/discharge port 71 is formed in the bottom of the suction/discharge nozzle 8 . The second suction/discharge port 71 communicates with the inside 5a of the outer cylinder 5 (Fig. 3).

When assembling the injection device 3, the third nozzle 13 sucks and discharges so that the suction and discharge nozzle 8 is inserted between one end side of the eighth cylindrical portion 61 and the large diameter portion 64 of the ninth cylindrical portion 62. The eighth tubular portion 61 is attached to the seventh tubular portion 60 so that it is connected to the nozzle 8 and the other end side of the eighth tubular portion 61 is inserted into the seventh tubular portion 60 (that is, The eighth tubular portion 61 is attached to the connector body 10). As a result, the inside of the connector 1 and the inside 5 a of the outer cylinder 5 communicate with each other through the first suction/discharge port 63 , the inside of the eighth cylindrical portion 61 , the inside of the suction/discharge nozzle 8 , and the second suction/discharge port 71 . , the interior of the connector 1 can be depressurized by retracting the plunger 6, and the interior of the connector 1 can be pressurized by the forward movement of the plunger 6.

In this embodiment, in order to attach the eighth tubular portion 61 to the seventh tubular portion 60 so that the other end of the eighth tubular portion 61 can be inserted into and removed from the seventh tubular portion 60, the eighth tubular portion 61 is attached to the seventh tubular portion 60. A male screw 72 (FIGS. 3 and 4) is formed on the outer peripheral surface of the cylindrical portion 61 on the other end side, and a female screw 73 (FIG. 3) is formed on the inner peripheral surface of the seventh tubular portion 60 . When inserting the other end side of the eighth tubular portion 61 into the seventh tubular portion 60, the male screw 72 and the female screw 73 are screwed together so that the eighth tubular portion 61 is inserted into the seventh tubular portion. It is attached to the shaped portion 60 (that is, the eighth cylindrical portion 61 is attached to the connector body 10). By releasing the engagement between the male screw 72 and the female screw 73, the eighth tubular portion 61 is pulled out from the seventh tubular portion 60, and the eighth tubular portion 61 is pulled out of the seventh tubular portion 60. (that is, the eighth tubular portion 61 is removed from the connector main body 10).

Of the outer peripheral surface on the other end side of the eighth tubular portion 61 and the inner peripheral surface of the seventh tubular portion 60, one has a convex portion and the other has a concave portion that engages with the convex portion. You may In this case, the eighth tubular portion 61 is attached to the seventh tubular portion 60 by engaging the convex portion and the concave portion, and the eighth tubular portion is attached by releasing the engagement between the convex portion and the concave portion. Part 61 is removed from seventh tubular part 60 .

Further, in this embodiment, the third nozzle 13 is attached to the suction/discharge nozzle 8 so that the suction/discharge nozzle 8 can be inserted and removed between one end of the eighth cylindrical portion 61 and the large diameter portion 64 of the ninth cylindrical portion 62. For this purpose, a pair of screw threads 74, 74 (FIG. 8) are formed on the outer peripheral surface of the suction/discharge nozzle 8, and a female screw 75 (FIG. 7) is formed on the inner peripheral surface of the large diameter portion 64. As shown in FIG. When inserting the suction/discharge nozzle 8 between the other end of the eighth cylindrical portion 61 and the large diameter portion 64, the threads 74, 74 are screwed into the female screw 75 so that the third nozzle 13 is It is connected to the intake/discharge nozzle 8 (that is, the third nozzle 13 is connected to the outer cylinder 5 of the syringe 7). The third nozzle 13 is removed from the intake/discharge nozzle 8 by releasing the engagement between the screw threads 74, 74 and the female screw 75 (that is, the third nozzle 13 is removed from the outer cylinder 5 of the syringe 7).

A spiral male screw may be formed on the outer peripheral surface of the suction/discharge nozzle 8 instead of the pair of screw threads 72 , 72 described above. In this case, a helical male screw that can be screwed into the male screw is formed on the inner peripheral surface of the large-diameter portion 64, and the screwing of the male screw and the female screw causes the third nozzle 13 to rotate. The third nozzle 13 is removed from the suction/discharge nozzle 8 by connecting to the suction/discharge nozzle 8 and releasing the screw engagement between the male screw and the female screw.

Alternatively, one of the outer peripheral surface of the suction/discharge nozzle 8 and the inner peripheral surface of the large-diameter portion 64 may be formed with a convex portion, and the other may be formed with a concave portion that engages with the convex portion. In this case, the third nozzle 13 is connected to the suction/discharge nozzle 8 by engaging the convex portion and the concave portion, and the third nozzle 13 is connected to the suction/discharge nozzle 8 by releasing the engagement between the convex portion and the concave portion. Removed.

When the injection device 3 is used, the plunger 6 is retracted to decompress the inside 10a of the connector body 10, so that the outer peripheral edge of the second flap 51 is pressed against the bottom of the sixth cylindrical portion 43, and the second flap 51 closes the first discharge port 17 (FIG. 3(A)). In addition, the plunger 6 retreats and the interior 10a of the connector body 10 is decompressed, so that the first flap 31 tilts into the third cylindrical portion 23 to open the first inlet 16 (Fig. 3(A)). . As a result, the nutrient 2 in the bowl 18 flows into the second cylindrical portion 22 from the tip opening of the second cylindrical portion 22 due to the pressure reduction described above, and the first inlet 16 and the third cylindrical portion 23 It flows into the interior 10 a of the connector body 10 through the inner and second inlets 25 .

By advancing the plunger 6 and pressurizing the inside 10a of the connector main body 10, the outer peripheral edge of the first flap 31 is pressed against the first bottom plate portion 21, and the first flap 31 closes the first inlet 16. (Fig. 3(B)). In addition, when the plunger 6 advances, the inside 10a of the connector body 10 is pressurized, so that the second flap 51 tilts into the fourth cylindrical portion 40 to open the first discharge port 17 (Fig. 3(B)). With this pressurization, the nutrients 2 present in the interior 10a of the connector main body 10 are removed from the first discharge port 17, the fourth cylindrical portion 40, the second discharge port 44, and the fifth cylindrical portion 42. and guided into the tube 4, and the nutrient 2 passed through the tube 4 is supplied to the stomach. In addition, when the nutritional supplement 2 is a viscous liquid food, the inner diameter of the second tubular portion 22, the diameter of the first inlet 16, the diameter of the second inlet 25, the diameter of the first discharge port 17, The diameter of the second discharge port 44, the inner diameter of the fifth cylindrical portion 42, the diameter of the first suction/discharge port 63, the inner diameter of the eighth cylindrical portion 61, and the diameter of the second suction/discharge port 71 are, for example, 2.9 mm or more. 5 mm or less.

According to the connector 1 according to this embodiment, the plunger 6 can be easily retracted and advanced while the second nozzle 12 is connected to the tube 4 and the third nozzle 13 is connected to the suction/discharge nozzle 8 of the outer cylinder 5 . The nutrient 2 can be injected into the stomach through the tube 4 by performing the work. According to the connector 1, there is no need to connect the nozzle to the tube 4 or remove the nozzle from the tube 4 each time the nutrient 2 is injected, unlike the conventional technology. It can reduce the workload of workers (nurses, etc.) who provide nutrition.

Further, according to the present embodiment, since the third tubular portion 23 can be inserted into and removed from the first tubular portion 20, it is possible to wash the first tubular portion 20 and the third tubular portion 23. can. Furthermore, the first on-off valve 14 can be removed from the first tubular portion 20 by removing the third tubular portion 23 from the first tubular portion 20 . Therefore, cleaning and replacement of the first on-off valve 14 are possible. Therefore, the flow of the nutrient 2 into the interior 10a of the connector body 10 via the first nozzle 11 and the opening and closing of the first inlet 16 by the first on-off valve 14 can be stably continued over a long period of time. .

Further, according to the present embodiment, since the fourth tubular portion 40 can be inserted into and removed from the sixth tubular portion 43, the fourth tubular portion 40 and the sixth tubular portion 43 can be cleaned. can. Further, by pulling out the fourth cylindrical portion 40 from the sixth cylindrical portion 43 , the second on-off valve 15 can be taken out from the sixth cylindrical portion 43 . Cleaning and replacement of the first on-off valve 14 are possible. Therefore, guiding the nutrient 2 to the tube 4 via the second nozzle 12 and opening and closing the first discharge port 17 by the second on-off valve 15 can be stably continued over a long period of time.

In addition, the suction/discharge nozzle 8 can be inserted and removed between the eighth tubular portion 61 and the large diameter portion 64 of the eighth tubular portion 61, so that the suction/discharge nozzle 8 and the eighth tubular portion can be separated from each other. 61 and the ninth tubular portion 62 can be cleaned. Therefore, the inside of the connector 1 and the inside 5a of the outer cylinder 5 communicate with each other through the first suction/discharge port 63, the inside of the eighth tubular portion 61, the inside of the suction/discharge nozzle 8, and the second suction/discharge port 44. can be stably maintained. As a result, the pressure reduction and pressurization of the interior 10a of the connector body 10 by the operation (backward and forward) of the plunger 6 can be stably continued over a long period of time.

The present invention is not limited to the above embodiments, and can be modified in various ways.

For example, in the above-described embodiment, the nutrient 2 stored in the bowl 18 is injected into the stomach of the human body using the injection device 3. 3 may be used to inject into the human stomach. In this case, for example, the first nozzle 11 is connected to a tube extending from the bag. By retracting the plunger 6 to depressurize the inside 10 a of the connector body 10 , the nutrient 2 in the bag is caused to flow into the connector body 10 via the tube 4 and the first nozzle 11 .

Further, the structures of the first nozzle 11 and the first on-off valve 14 are not limited to those shown in the drawings. For example, the entire first nozzle 11 may be configured by part of the outer wall 24 of the connector body 10 . In this case, the first inlet 16 is formed in the outer wall 24 that constitutes the first nozzle 11 , and the first inlet 16 communicates with the interior 10 a of the connector body 10 . The first on-off valve 14 opens the first inflow port 16 by decompressing the inside 10a of the connector main body 10 by retreating the plunger 6, and pressurizing the inside 10a of the connector main body 10 by advancing the plunger 6. shall be blocked.

As the first on-off valve 14, a ball valve capable of opening and closing the first inlet 16 by movement of a ball (for example, an iron ball) or a duckbill valve capable of opening and closing the first inlet 16 may be used.

Also, the structures of the second nozzle 12 and the second on-off valve 15 are not limited to the structures shown in the drawings. For example, the entire second nozzle 12 may be configured by a portion of the outer wall 24 of the connector body 10 . In this case, the first outlet 17 is formed in the outer wall 24 that constitutes the second nozzle 12 , and the first outlet 17 communicates with the interior 10 a of the connector main body 10 . The second on-off valve 15 closes the first discharge port 17 by reducing the pressure inside 10a of the connector body 10 by retreating the plunger 6, and by pressurizing the inside 10a of the connector body 10 by advancing the plunger 6, the first discharge. The exit 17 shall be opened.

As the second on-off valve 15, a ball valve capable of opening and closing the first discharge port 17 by movement of a ball (for example, an iron ball) or a duckbill valve capable of opening and closing the first discharge port 17 may be used.

Also, the structures of the third nozzle 13 and the suction/discharge nozzle 8 are not limited to the structures shown in the drawings. For example, the entire third nozzle 13 may be configured by part of the outer wall 24 of the connector body 10 . In this case, by inserting the suction/discharge nozzle 8 into an opening formed in the outer wall 24 that constitutes the third nozzle 13, the interior 10a of the connector main body 10 and the interior are communicated with each other.

1 Connector 2 Nutrient 3 Injector 4 Tube 5 Outer cylinder 6 Plunger 7 Syringe 8 Suction/discharge nozzle 10 Connector body 11 First nozzle 12 Second nozzle 13 Third nozzle 14 First on-off valve 15 Second on-off valve 16 First inlet 17 First discharge port 20 First tubular portion 21 First bottom plate portion 22 Second tubular portion 23 Third tubular portion 24 Outer wall 25 of connector body Second inlet 30 First annular body 31 First flap 32 First connection Part 40 Fourth tubular part 41 Second bottom plate part 42 Fifth tubular part 43 Sixth tubular part 44 Second discharge port 50 Second annular body 51 Second flap 52 Second connection part 60 Seventh tubular part 61 Eighth cylindrical portion 62 Ninth cylindrical portion 63 First suction/discharge port 64 Large diameter portion 65 Small diameter portion 70 Tip wall of outer cylinder,
71 Second intake/exhaust port

Claims (9)

A connector provided in an injection device capable of injecting a nutrient into the stomach of a human body through a tube by operating a plunger inserted into the outer cylinder of the syringe,
a box-shaped connector body;
a first nozzle formed with a first inlet for allowing the nutrient to flow into the connector body;
A first ejection port for ejecting the nutrient present inside the connector body is formed and connected to the tube, whereby the nutrient ejected from the first ejection port can be guided to the tube. a possible second nozzle;
a third nozzle that connects the inside of the connector body and the inside of the outer cylinder of the syringe by being connected to an intake/discharge nozzle formed at the tip of the outer cylinder;
a first on-off valve for opening and closing the first inlet;
A second on-off valve for opening and closing the first outlet,
By retracting the plunger to reduce the pressure inside the connector body, the first on-off valve opens the first inlet and the second on-off valve closes the first outlet. As a result, the reduced pressure allows the nutrient to flow into the first nozzle, pass through the first inlet and into the connector body, and advance the plunger. By pressurizing the inside of the connector main body, the first on-off valve opens the first inlet and the second on-off valve closes the first discharge port. A connector, wherein the nutrient present inside the connector body can be guided into the tube by pressure through the first outlet and the second nozzle. The first nozzle includes a first tubular portion, a first bottom plate portion, a second tubular portion, and a third tubular portion,
The first cylindrical portion is provided so as to protrude from the first bottom plate portion, the first bottom plate portion constitutes a bottom, the first inlet is formed in the first bottom plate portion,
The second tubular portion is provided so as to protrude from the first bottom plate portion to the opposite side of the first tubular portion, and the inside of the second tubular portion communicates with the first inlet. and
The third tubular portion is provided so as to protrude from the outer wall of the connector main body, and the bottom of the third tubular portion is configured by the outer wall of the connector main body. The bottom is formed with a second inlet that communicates with the inside of the connector body,
The first on-off valve includes a first annular body, a first flap having a diameter larger than that of the first inlet and arranged inside the first annular body, and an inner circumference of the first annular body. and a first connecting portion that connects a portion of the outer periphery of the first flap, the first on-off valve being placed in the first cylindrical portion, and the first flap being the By inserting the third tubular portion into the first tubular portion with the first annular body placed on the first bottom plate portion so as to cover the first inlet, the first an annular body is sandwiched between the first bottom plate portion and the tip of the third cylindrical portion;
By retracting the plunger and decompressing the inside of the connector body, the first flap tilts into the third cylindrical portion to open the first inlet, and the decompression causes the nutrient to flow into the second Flowing into the second tubular portion from the tip opening of the tubular portion, passing through the first inlet, the third tubular portion, and the second inlet to flow into the connector body. By advancing the plunger and pressurizing the inside of the connector body, the outer peripheral edge of the first flap is pressed against the first bottom plate portion and the first flap closes the first inlet 2. The connector of claim 1, wherein the connector is in a closed state. 3. The connector according to claim 2, wherein the first tubular portion is attached to the third tubular portion so that the third tubular portion can be inserted into and removed from the first tubular portion. The second nozzle includes a fourth tubular portion, a second bottom plate portion, a fifth tubular portion, and a sixth tubular portion,
The fourth tubular portion is provided so as to protrude from the second bottom plate portion, the second bottom plate portion forms a bottom, and the second bottom plate portion is formed with a second outlet,
The fifth tubular portion is provided so as to protrude from the second bottom plate portion to the opposite side of the fourth tubular portion, and the inside of the fifth tubular portion communicates with the second discharge port. and the tube is connected to the fifth tubular portion,
The sixth cylindrical portion is provided so as to protrude from the outer wall of the connector body, and the outer wall of the connector body constitutes a bottom, and the bottom of the sixth cylindrical portion defines the interior of the connector body. The communicating first discharge port is formed,
The second on-off valve includes a second annular body, a second flap having a diameter larger than that of the first discharge port and arranged inside the second annular body, and a valve inside the second annular body. and a second connecting portion that connects a part of the circumference and a part of the outer circumference of the second flap, the second on-off valve being put in the sixth cylindrical part, and the second flap The fourth tubular portion is inserted into the sixth tubular portion while the second annular body is placed on the bottom of the sixth tubular portion so as to cover the first discharge port. and the second annular body is sandwiched between the bottom of the sixth bottom-shaped portion and the tip of the fourth cylindrical portion,
By retracting the plunger and decompressing the inside of the connector body, the outer peripheral edge of the second flap was pressed against the bottom of the sixth tubular portion, and the second flap closed the first discharge port. By advancing the plunger and pressurizing the inside of the connector body, the second flap tilts into the fourth cylindrical portion to open the first discharge port, and the pressurization is performed. by passing the nutrient present inside the connector body through the first outlet, the fourth tubular portion, the second outlet, and the fifth tubular portion, and leading it into the tube. 4. The connector according to any one of claims 1 to 3, wherein 5. The connector according to claim 4, wherein the fourth tubular portion is attached to the sixth tubular portion so that the fourth tubular portion can be inserted into and removed from the sixth tubular portion. An injection device for injecting a nutrient into the stomach of a human body,
a connector according to any one of claims 1 to 5;
the tube;
An injection device comprising the barrel and the syringe comprising the plunger. the third nozzle includes a seventh tubular portion, an eighth tubular portion, and a ninth tubular portion,
The seventh tubular portion is provided so as to protrude from the outer wall of the connector main body, and the bottom of the seventh tubular portion is constituted by the outer wall of the connector main body. The first suction/discharge port communicating with the inside of the connector body is formed on the bottom,
The ninth cylindrical portion has a large-diameter portion on one end side and a small-diameter portion on the other end side, and the one end side of the eighth cylindrical portion passes through the inside of the large-diameter portion. arranged such that the small diameter portion is connected to the outer wall of the eighth tubular portion,
The suction/discharge nozzle is provided so as to protrude from the front end wall of the outer cylinder, the bottom of the suction/discharge nozzle is constituted by the front end wall of the outer cylinder, and the bottom of the suction/discharge nozzle is provided with the outer cylinder. A second suction/discharge port is formed that communicates with the inside of the
The third nozzle is connected to the suction/discharge nozzle so that the suction/discharge nozzle is inserted between one end of the eighth cylindrical portion and the large diameter portion of the ninth cylindrical portion, and By attaching the eighth tubular portion to the seventh tubular portion such that the other end side of the eighth tubular portion is inserted into the seventh tubular portion, the inner portion of the connector and the outer cylinder are connected. The inside communicates with the inside of the connector through the first suction/discharge port, the inside of the eighth cylindrical portion, the inside of the suction/discharge nozzle, and the second suction/discharge port, and the plunger retreats to decompress the inside of the connector. 7. The injection device of claim 6, wherein advancement of said plunger is capable of pressurizing the interior of said connector. The third nozzle is connected to the suction/discharge nozzle so that the suction/discharge nozzle can be inserted/removed between one end of the eighth cylindrical portion and the large diameter portion of the eighth cylindrical portion. 8. An injection device according to claim 7. The injection device according to claim 7 or 8, wherein the eighth tubular portion is attached to the seventh tubular portion so that the other end side of the eighth tubular portion can be inserted into and removed from the seventh tubular portion. .

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