JPH0237782B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates primarily to an infusion container used for storing intravenous fluid.

(Prior Art) Conventionally, glass bottles have been used as infusion containers for storing intravenous fluids and the like. In the case of glass infusion containers, an air hole is provided in the stopper that fits tightly into the mouth of the bottle to allow air to enter the bottle as the amount of intravenous fluid decreases. In recent years, it has been considered to use an infusion container made of soft synthetic resin instead of a bottle so that the infusion container collapses as the amount of intravenous fluid decreases.

(Problems to be Solved by the Invention) However, infusion containers made of glass bottles are more expensive than infusion containers made of synthetic resin, have a more complicated structure due to the provision of air holes in the spout, and furthermore, It also had the disadvantage of being bulky.

In addition, synthetic resin infusion containers collapse as the amount of intravenous fluid decreases, but depending on how they collapse, the intravenous fluid inside may not be able to be completely drained. Even so, there was a drawback that the way the container collapsed was not reproducible, and the way the drip solution came out differed from container to container.

This invention was made in view of the above-mentioned problems, and its purpose is to ensure that the body always collapses stably into a fixed shape as the liquid meter contained in the body discharges, and completely drains the liquid. The purpose is to provide an infusion container that can be drained.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the infusion container made of soft synthetic resin according to the present invention has a container opening, a shoulder, and a bottom wall that are thicker than the body. , and the bottom wall is formed into a rectangular shape with rounded corners having a size approximating the body width on the short axis side of the elliptical shoulder, and the side surface of the body continuous with the long axis side of the elliptical shoulder bulges outward from the body width on the long axis side, A triangular surface with the bottom wall as the base is provided at the lower part of the side surface of the body, and the front and rear surfaces of the body continuous with the short diameter side of the elliptical shoulder are slightly concavely curved inward.

(Function) In the infusion container of the present invention, the body gradually becomes flat as the stored liquid is discharged, and eventually collapses into a substantially planar shape, allowing the contained liquid to be sufficiently discharged.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The infusion container 1 of this embodiment has a flange 3 on the outer periphery of the mouth part 2, and a shoulder part 4 continuous from the mouth part 2 to the body part 5 has an elliptical shape and is smooth toward the body part 5. The mouth part 2, the oval shoulder part 4 continuous thereto, and the container bottom wall 7 are formed to be thicker than the body part 5. The distance is larger than the vertical distance from the short diameter end to the mouth 2, and the bottom wall 7 is formed into a rectangular shape with rounded corners having a size approximating the width l of the short diameter side of the elliptical shoulder 4. 5 has an elliptical cross section as shown in FIG. The lower part of the side surface 5a narrows toward the bottom wall 7 which approximates the short diameter side body width l,
The front and back surfaces 5b of the trunk section, which are continuous with the short diameter side of the shoulder section 4, are slightly concavely curved inward. and torso side 5
A triangular surface 6 whose base is a square bottom wall 7 with rounded corners is formed in the lower part of a, and this triangular surface 6 is formed so as to be inclined outward with the bottom wall 7 as the center.

Note that the shape of the container bottom wall 7 may be a polygon other than a rectangular shape with rounded corners.

The infusion container 1 of this embodiment is manufactured in a mold having the external shape of the infusion container 1 by a so-called blow molding method.

For example, when an intravenous solution is stored in the infusion container 1 of this embodiment and the infusion solution is used, the tube is inserted into the spout that fits tightly into the container mouth 2, and the infusion container 1 is turned upside down and the mouth portion 2 is opened. The tube faces downward and the intravenous fluid is discharged from the tube.

When the infusion solution is discharged from the infusion container 1 in this state, the internal pressure of the infusion solution container 1 decreases as the infusion solution is discharged, so that the body 5 of the infusion solution container 1 gradually collapses due to atmospheric pressure. At this time, the oval shoulder 4 and the container bottom wall 7 of the infusion container 1 are thicker than the body 5, and the body side 5a bulges outward, and the front and rear surfaces 5b of the body 5 are concave inward. Therefore, the torso side 5a
It bends around the central axis in the longitudinal direction as a ridge line, and the front and rear surfaces 5b of the body 5 gradually become depressed and collapse. When the intravenous fluid is further discharged and the remaining amount decreases, as shown in FIG. The front and rear surfaces 5b are crushed so that they approach each other. At this time, the triangular surface 6 provided toward the trunk side surface 5a from the bottom wall 7 falls outward around the bottom wall 7, which is the base of the triangular surface 6, and as the storage capacity decreases, the triangular surface 6 The angle θ1 formed with the bottom wall 7 gradually increases, and the angle θ2 formed between the ridge line of the body side surface 5a and the triangular surface 6 gradually decreases. this is,
When the infusion container 1 is turned upside down and the intravenous solution is discharged, the force that tries to spread the body 5 due to the weight of the container 1 and the intravenous solution stored inside it is suppressed by the stable and constant force of the triangular surface 6. It functions to stably discharge the intravenous fluid while absorbing and weakening it through changes. On the other hand, the angle θ3 formed between the shoulder portion 4 and the front and rear surfaces 5b of the trunk gradually becomes smaller as the amount of intravenous fluid stored decreases.

This prevents the deformation of the infusion container 1 that occurs as the intravenous fluid is discharged from the side surface 5a of the body and the front and rear surfaces 5a of the body.
By mainly changing b and shaping the shoulder portion 4 and bottom wall 7, the vertical displacement of the liquid surface accompanying the discharge of the drip liquid is made constant.

According to this embodiment, the infusion container is molded from a soft synthetic resin, and the opening, the elliptical shoulder connected thereto, and the bottom wall of the container are made thicker than the body, thereby minimizing deformation due to liquid discharge. However, on the other hand, since the container body tends to collapse into a certain shape as the liquid contained in it is discharged, when used as an infusion container for intravenous fluids, the deformation of the container body is always constant and the intravenous fluid The discharge rate is also constant, and the intravenous fluid inside can be completely discharged naturally.

Moreover, unlike glass bottles, air holes are not required, and the infusion container can be manufactured at low cost.

〔Effect of the invention〕

According to this invention, the opening of the infusion container, the elliptical shoulder continuous thereto, and the bottom wall of the container are made thicker than the body to reduce deformation due to liquid discharge, and the sides of the body are made thicker than the body on the longer diameter side. The container body bulges outward from its width, has a triangular surface with the bottom wall as its base at its lower part, and slightly concavely curves the front and rear surfaces of the body that are continuous with the short diameter side of the oval shoulder inward. Because the body of the infusion container is easily deformed, it is easy to collapse as the liquid is discharged, and it always collapses in a fixed shape as the liquid is discharged, allowing the liquid to be completely discharged at a constant speed. be able to. This allows the liquid contained in the infusion container to be used effectively without wasting it. In addition, since the liquid discharge is constant and the drop in the liquid level is also constant, even if the remaining amount is displayed in the vertical direction of the body, there will be no large discrepancy in the remaining amount displayed.

In particular, the triangular surface provided at the bottom of the side of the body forms a triangle with the bottom wall as the base, and as the body collapses, it slopes outward, so the body bends along each side of the triangular surface. Mash it so that no liquid remains.

[Brief explanation of drawings]

FIG. 1 is a front view of an infusion container according to the present invention, FIG. 2 is a side view thereof, FIG. 3a is a sectional view taken along line AA in FIG. 1, and FIG. , FIG. 3c is a sectional view taken along the line C--C in FIG. 1, and FIG. 4 is a side view of the infusion container showing the state of use. 1... Infusion container, 2... Mouth, 4... Shoulder, 5
...Torso, 5a...Side, 5b...Anteroposterior, 6...
...triangular surface, 7...bottom wall.

Claims (1)

[Claims] 1. In an infusion container made of a soft synthetic resin in which the body 5 for storing liquid has an elliptical cross section, the mouth 2 of the infusion container, the oval shoulder 4 continuous thereto, and the bottom wall 7 of the container are connected to the body. The bottom wall 7 is formed into a rectangular shape with rounded corners having a size approximating the body width l on the short axis side of the oval shoulder part 4, while the body continuous to the long axis side of the oval shoulder part 4 is formed thicker than the part 5. The body side surface 5a bulges outward from the body width L on the major axis side, and a triangular surface 6 whose base is the bottom wall 7 is provided at the lower part of the body side surface 5a, and the body front and rear surfaces are continuous with the minor axis side of the oval shoulder part 4. An infusion container characterized in that 5b is slightly bent inward.