JP3008219B2 - Double inner stopper of chemical container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid medicine such as eye drops, which does not cause deterioration of the liquid medicine.
The present invention relates to a double inner plug of a chemical solution container capable of draining a chemical solution well.

[0002]

2. Description of the Related Art There is known a double inner plug of a drug solution container which is designed so that a drug solution can be repeatedly discharged from a liquid drug solution such as eye drops, and that there is no risk of deterioration of the drug solution. (Japanese Utility Model Publication No. 1-152929).

[0003] This is an inner cylinder 1 made of a hard synthetic resin,
It is combined with an outer cylinder 2 made of a soft synthetic resin (FIG. 3), and when inserted into the mouth K1 of a chemical solution container K made of a hard synthetic resin, the stored chemical liquid comes into contact with the outer cylinder 2 made of a soft synthetic resin. Therefore, the deterioration of the chemical solution can be effectively prevented. This is because the soft synthetic resin may absorb the active ingredient of the chemical solution and deteriorate the chemical solution, but by eliminating the contact between the two, the fear can be eliminated. The reason why the outer cylinder 2 is made of a soft synthetic resin is that the inner cylinder 1 is made to act as a packing between the inner cylinder 1 and the mouth portion K1, and the inner cylinder 1 is easily inserted into the chemical liquid container K made of the hard synthetic resin. This is because the cap C can be repeatedly attached and detached. This is because, when the hard synthetic resins are in contact with each other, a dimension adjusting function cannot be expected, and a galling phenomenon may occur on the contact surface.

A spout hole 1a is formed inside the inner cylinder 1, and the spout hole 1a is closed by a plug Ca formed at the top of the inner surface of the cap C.

[0005]

According to the prior art, when the cap C is removed and the spout hole 1a is opened, a part of the stored chemical liquid leaks to the outside, or when the eye drops are applied, the chemical liquid drops. There is a drawback that it may fall off, especially in the case of a colored chemical solution, which may stain clothes. That is, the drug solution container K before opening is
Due to the free posture, the liquid medicine often fills the inside of the pouring hole 1a or enters the inside of the pouring hole 1a together with bubbles of air. On the other hand, in this state, pressure is applied to the chemical solution container K to remove the cap C,
When the temperature of the drug solution container K rises by holding it by hand, the drug solution in the pouring hole 1a inadvertently overflows to the outside,
Dropping can occur.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to prevent a chemical solution from leaking to the outside or dripping by forming a constricted portion below a pouring hole. And it is suitable for repeated discharge of chemicals,
An object of the present invention is to provide a double plug of a drug solution container which is free from a risk of deterioration of the drug solution.

[0007]

In order to achieve the above object, the construction of the present invention comprises an inner cylinder made of a hard synthetic resin having a flange at a lower portion which fits into a mouth of a chemical solution container, and an inner cylinder. ,
A spout made of a soft synthetic resin outer cylinder attached to the upper part of the flange, and a pouring hole penetrating vertically through the inner cylinder and the outer cylinder is provided at the bottom of the inner cylinder while continuously expanding upward. And a tapered portion that communicates above the narrowed portion and expands and expands in a tapered shape toward the top of the outer cylinder, and the narrowed portion replaces the air in the pouring hole with the chemical solution. The gist is to prevent it.

[0008] The constriction may be smoothly opened upward at the bottom of the inner cylinder.

[0009]

According to the structure of the present invention, since the inner cylinder forms the lower part of the double inner plug and the outer cylinder forms the upper part, the stored chemical liquid can contact the outer cylinder made of a soft synthetic resin. Not
There is no risk of deterioration. On the other hand, since the injection hole forms a narrow portion at the bottom of the inner cylinder, even when the chemical solution container is in a free position, the replacement of the air in the injection hole with the chemical solution through the narrow portion is prevented, and therefore, Since there is no possibility that the liquid medicine enters the pouring hole, it is possible to effectively prevent the liquid medicine from leaking to the outside or dropping of the liquid medicine when the cap is removed and opened. The discharge hole has a large volume above the stenosis portion, and when the drug solution is discharged and used, the drug solution fills this volume through the stenosis portion and then flows out. Even if there is a slight rise in the temperature of the chemical solution container by holding the hand, no dripping of the chemical solution will occur.

In addition, the discharge hole is formed by continuously expanding the constricted portion upward so as to push the side surface of the liquid medicine container to discharge the liquid medicine, and then remove the pressing force against the liquid medicine container to remove the liquid medicine container. When the deformation is restored, the drug solution in the pouring hole can be sucked into the drug solution container through the constriction. At this time, the chemical solution remaining above and inside the stenosis is pushed downward by surface tension, and the entire amount can be easily returned to the chemical solution container.

[0011]

Embodiments will be described below with reference to the drawings.

A double inner stopper (hereinafter simply referred to as an inner stopper) 10 of a chemical solution container is formed by combining an inner cylinder 11 and an outer cylinder 12 (FIG. 1), and is inserted into the mouth K1 of the chemical solution container K. .

The chemical liquid container K is a flat hollow container having an opening K1 at the top, and is integrally formed of a hard synthetic resin material such as polyethylene terephthalate. The liquid medicine container K has shoulders K2 and K2 formed on both left and right sides of the mouth K1, and locking projections K1a and K1a are formed on both left and right outer sides of the mouth K1.

The inner plug 10 is an inner cylinder 11 made of a hard synthetic resin and having a ring-shaped flange 11a which fits water-tightly into the mouth K1.
And an outer cylinder 12 made of a soft synthetic resin and attached to the inner cylinder 11 above the flange 11a. The outer cylinder 12 is formed with a flange 12a that contacts the upper end surface of the mouth K1.
The lower portion of the flange 12a is press-fitted into the mouth K1. The inner cylinder 11 and the outer cylinder 12 are assembled together via a retaining ring 11b formed on the inner cylinder 11.

The inner plug 10 has a constricted portion 11c formed at the bottom of the inner cylinder 11, a tapered portion 11d formed above and below the constricted portion 11c, a large-diameter portion 11e, and a through-hole opening at the top of the outer cylinder 12. An injection hole X communicating with the discharge hole 12b is formed. The pouring hole X penetrates the inner cylinder 11 and the outer cylinder 12 up and down,
The tapered portion 11d communicates above the narrowed portion 11c and expands in a tapered shape toward the top of the outer cylinder 12. The inner surfaces of the tapered portion 11d and the through hole 12b are smoothly continuous with each other, and the pouring hole X is formed to be longer than the maximum inner diameter at the top of the outer cylinder 12. The stenosis part 11c is
At the center of the bottom surface of the inner cylinder 11, it is formed in a funnel shape wide upward, penetrates the bottom of the inner cylinder 11 from bottom to top while continuously expanding and expanding upward, and has a smooth upper end edge. It is formed and opens smoothly upward.

The inner cylinder 11 is integrally formed of, for example, polyethylene terephthalate / polybutylene terephthalate / polycarbonate / polyarylate.
2 is integrally molded of, for example, polyethylene / polypropylene.

A cap C is mounted on the upper part of the chemical solution container K.

The cap C covers the mouth K1 and the shoulders K2, K2 of the chemical solution container K as a whole.
It has a thickness t substantially equal to that of the chemical solution container K, and is formed in a substantially half-moon-shaped lid whose lower part is open. At the top of the cap C, a pair of locking portions C1, C1 resiliently engaging with the locking ridges K1a, K1a of the mouth portion K1 are vertically provided, and further sandwiched between the locking portions C1, C1. In this way, a stopper C2 for closing the pouring hole X is formed.

The cap C is pushed in so that its longitudinal direction is aligned with the shoulders K2, K2 of the chemical container K (in the direction of the arrow A in FIG. 1), and the locking portions C1, C1 are engaged with the locking ridges K1a, K1a. By combining them, they can be attached integrally to the drug solution container K. At this time, the inner surface of the top of the cap C is strongly pressed against the top of the inner plug 10, and the stopper C2 can close the pouring hole X in a watertight manner.
Note that the stopper part C2 penetrates at least the through hole 12b of the outer cylinder 12 with respect to the pouring hole X, and the tapered part 11d of the inner cylinder 11
.

The cap C can be easily removed from the chemical solution container K by rotating the cap C so as to twist left and right with respect to the chemical solution container K. That is, when the cap C is twisted,
The lower edges C3 and C3 of the cap C are connected to the shoulder K of the chemical solution container K.
2 and K2 (indicated by the two-dot chain line in FIG. 1), and the cap C can be driven in a direction (as opposed to the arrow A in FIG. 1) as a whole to be disengaged from the drug solution container K.
1, C1 is disengaged from the locking ridges K1a, K1a, whereby the cap C is separated from the chemical solution container K. At this time, the stopper C2 is pulled out of the pouring hole X, and the pouring hole X can be opened.

The chemical solution container K after opening is turned upside down, and the stored chemical solution can be discharged by pressing and deforming the side surface with fingers.

Since the stored chemical solution has the constricted portion 11c in the inner plug 10, it is difficult to replace the air in the tapered portion 11d. Therefore, irrespective of the posture of the chemical solution container K, unless it is positively deformed, It does not enter the tapered portion 11d. Therefore, when removing the cap C, even if the chemical solution container K is slightly deformed, or even if the temperature of the chemical solution container K is slightly increased, the chemical solution is inadvertently leaked to the outside or dripped. Nothing. Further, at the time of discharge, the chemical solution fills the tapered portion 11d via the constricted portion 11c, and thereafter flows out through the through-hole 12b. At this time,
The chemical does not come into contact with the soft synthetic resin other than temporarily contacting the outer cylinder 12 when passing through the through-hole 12b.
Therefore, it is possible to effectively prevent the chemical solution from being deteriorated by the soft synthetic resin.

When the discharge of the chemical is completed, the tapered portion 11d
The liquid medicine remaining in the liquid medicine container K is sucked into the liquid medicine container K through the stenosis portion 11c by releasing the finger from the liquid medicine container K and restoring the deformation. At this time, the tapered portion 11
d, due to the taper of the tapered portion 11d and the tapered portion of the narrowed portion 11c, surface tension acts in the downward direction, and the inner surface of the pouring hole X is entirely smooth. There is no particular blind spot in the air. Therefore, the entire amount of the drug solution in the tapered portion 11d and the narrowed portion 11c can be easily returned to the drug solution container K.

[0024]

[Other Embodiment] In the inner plug 10, a constricted portion 11c can be formed at the lower end of the inner cylinder 11 (FIG. 2). Since there is no large-diameter portion 11e in which the chemical liquid easily stays, the chemical liquid remaining in the pouring hole X can be more reliably eliminated except at the time of discharge.

In the above description, the injection hole X is provided with the tapered portion 11d and the constricted portion 11c so that when the liquid medicine is discharged and the liquid medicine in the injection hole X is sucked into the liquid medicine container K, The entire amount of the drug solution in the pouring hole X is more easily sucked. This is because the tapered portion 11d and the constricted portion 11c gradually decrease in cross-sectional area from the upper side to the lower side of the inner plug 10, so that the flow rate of the chemical solution tends to gradually increase. It is also convenient for removing the mold during molding.

The overall shapes of the chemical solution container K and the cap C can be arbitrarily changed irrespective of the illustration, and the cap C is attached to and detached from the chemical solution container K via a screw. It may be a conventional screw type.

[0027]

As described above, according to the present invention, the pouring hole vertically penetrating the inner tube made of hard synthetic resin and the outer tube made of soft synthetic resin is continuously upward. By providing a narrow portion that penetrates the bottom of the inner cylinder while expanding and prevents replacement of the air in the pouring hole with the chemical solution, and a tapered portion above the narrow portion, the narrow portion is formed of the chemical solution container. Regardless of the posture, the air in the pouring hole and the stored chemical in the chemical solution container are replaced to effectively prevent the chemical from entering the pouring hole.
In conjunction with the upper taper, the entire amount of the chemical in the pouring hole can be easily returned to the chemical container by surface tension,
When the cap is removed and opened, or when the chemical solution is discharged and used, there is no risk of the chemical solution leaking to the outside or dripping, and the drainage performance of the chemical solution is extremely good. Has an excellent effect.

Further, since there is no substantial contact between the chemical solution and the soft synthetic resin, the chemical solution can be prevented from being deteriorated.
By interposing the soft synthetic resin, there is an effect that even when the chemical solution is repeatedly discharged, there is no harmful galling phenomenon and there is no possibility that the sealing performance is deteriorated at all.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the overall configuration in a longitudinal section.

FIG. 2 is an enlarged cross-sectional equivalent view of a main part of FIG. 1 showing another embodiment.

FIG. 3 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 X ... pouring hole K ... chemical liquid container K1 ... mouth 10 ... double inner plug 11 ... inner cylinder 11a ... flange 11c ... constriction part 11d ... taper part 12 ... outer cylinder

Claims (2)

(57) [Claims] 1. An inner cylinder made of a hard synthetic resin having a flange at a lower portion which fits into a mouth portion of a chemical solution container, and an outer cylinder made of a soft synthetic resin which is mounted on the inner cylinder above the flange. Consisting of a tube,
A pouring hole vertically penetrating the inner cylinder and the outer cylinder, a constricted portion penetrating the bottom of the inner cylinder while continuously expanding upward, and communicates above the constricted portion, A tapered portion that expands and expands in a tapered shape toward the top of the outer cylinder, wherein the constricted portion prevents replacement of air in the spout hole with a drug solution. plug. 2. The double inner plug according to claim 1, wherein the narrowed portion is smoothly opened upward at the bottom of the inner cylinder.