JP2009255950A - Double inner stopper for medical fluid container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double inner stopper for a medical fluid container which prevents a medical fluid in the medical fluid container from scattering in a cap when the cap is removed and has no possibility of generating deterioration of the medical fluid. <P>SOLUTION: An inner cylinder 11 and an outer cylinder 12 respectively integrally molded are combined coaxially vertically, and are inserted into an opening part K1 of the medical fluid container K, and the lower end part of a blocking pin 12b of the outer cylinder 12 is inserted into a tapered hole 11b of the bottom part of the inner cylinder 11 constituting the double inner stopper 10 of the medical fluid container K. A small channel for a flow path of the medical fluid communicating with a spouting hole 11a from the inside of the medical fluid container K is formed in either one of the inner face of the tapered hole 11b or the outer face of the lower end part of the blocking pin 12b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a double inner stopper of a chemical solution container that does not cause alteration of a liquid chemical solution such as eye drops.

  There is known a double plug of a chemical solution container that is devised so that the chemical solution can be repetitively discharged with respect to a liquid chemical solution such as eye drops and the chemical solution is not deteriorated (Patent Document 1). .

  This is a combination of a hard synthetic resin inner cylinder and a soft synthetic resin outer cylinder, and when inserted into the mouth of a hard synthetic resin chemical container, the chemical in the chemical container is made of soft synthetic resin. It is possible to effectively prevent the chemical solution from deteriorating without contacting the outer cylinder. This is because the soft synthetic resin may adsorb the active ingredient of the chemical solution to alter the chemical solution, but the possibility of eliminating it can be eliminated by cutting the contact between the two.

Moreover, such a double inner stopper of the chemical solution container can effectively prevent problems such as dropping of the chemical solution by forming a narrowed portion at the lower portion of the pouring hole formed in the inner cylinder ( Patent Document 2).
Japanese Utility Model Publication 1-18529 Japanese Patent Laid-Open No. 5-124663

  In the latter case of the prior art, the narrowed portion formed in the lower portion of the inner cylinder outlet hole is merely a small taper hole with a small upward diameter. For example, when the cap is removed, If a large pressing force is temporarily applied, a small amount of chemical liquid may be ejected from the dripping hole at the tip of the inner plug and scattered into the cap, or the scattered chemical liquid may be mistaken as a liquid leak. There was a problem.

  Accordingly, an object of the present invention is to remove the cap by forming a flow path for a chemical solution by a small groove between the tapered hole below the pouring hole and the closing pin that closes the tapered hole in view of the problems of the prior art. It is an object of the present invention to provide a double inner stopper of a chemical solution container that can effectively prevent the chemical solution from inadvertently splashing in the cap at the time and the like, and does not cause any deterioration of the chemical solution.

  In order to achieve this object, the configuration of the present invention is such that an outer cylinder integrally molding a soft synthetic resin and an inner cylinder integrally molding a hard synthetic resin are vertically and coaxially combined and inserted into the mouth portion of a chemical container. The inner tube has an upward pouring hole formed on the shaft center, an upward taper hole that opens at the bottom of the pouring hole and communicates with the inside of the chemical liquid container. The outer cylinder has a dropping hole that continues to the top and opens upward at the top, and a closing pin that hangs down on the axis and inserts the lower end into the tapered hole. The gist of the invention is to form a small groove for a flow path of the chemical solution communicating with the dispensing hole from the inside of the chemical solution container on either one of the outer surfaces of the lower end portion of the closing pin.

  The upper end of the closing pin can be supported via a connecting portion formed radially in the radial direction of the lower inner surface of the dropping hole, and the lower end portion of the closing pin is tapered downward to match the inner surface of the tapered hole. Can be sharpened.

  According to the configuration of the invention, the inner cylinder forms the lower part of the double inner plug and the outer cylinder forms the upper part, so that the chemical solution in the chemical solution container may contact the outer tube made of soft synthetic resin. There is no risk of alteration. On the other hand, the small groove formed on either the inner surface of the tapered hole of the inner cylinder or the outer surface of the lower end portion of the closing pin of the outer cylinder is a flow path when the chemical liquid in the chemical liquid container flows out to the dropping hole through the dispensing hole Therefore, even if a large pressing force is temporarily applied to the barrel of the chemical container when removing the cap, the chemical solution can be injected by reducing the effective cross-sectional area of the small groove sufficiently small. There is no possibility of flowing out into the outlet hole and the dropping hole, and the chemical solution is not accidentally scattered from the dropping hole into the cap. In addition, when the chemical solution in the chemical solution container is normally dropped from the dropping hole and used, the chemical solution container is inverted and continuously applied to the barrel to drop it as a droplet of the appropriate size. The chemical solution can be dripped from the hole.

  The closing pin can be easily integrally formed as a part of the outer cylinder by holding the upper end via a plurality of connecting portions on the lower inner surface of the dropping hole. In addition, the opening part for the chemical | medical solution from a pouring hole to flow out toward a dripping hole is formed between the radial connection parts.

  The lower end portion of the closing pin is sharpened in a tapered shape in accordance with the inner surface of the tapered hole, so that it can be easily inserted into the tapered hole, and the entire outer surface of the lower end portion excluding the channel portion by the small groove is in close contact with the inner surface of the tapered hole be able to.

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

  The double inner stopper 10 of the chemical liquid container is formed by coaxially combining a lower inner cylinder 11 and an upper outer cylinder 12 (FIGS. 1 and 2), and is inserted into the mouth K1 of the chemical liquid container K. .

  The chemical solution container K is a flat hollow container having a mouth K1 at the top. The chemical solution container K is thin in the direction perpendicular to the paper surface of FIGS. 1 and 2, and is integrally formed of a hard synthetic resin material such as polyethylene terephthalate. The chemical solution container K has shoulders K2 and K2 formed on the left and right sides of the mouth K1, and locking protrusions K1a and K1a are formed on the left and right outer sides of the mouth K1.

  The inner cylinder 11 is integrally formed of a hard synthetic resin such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), polyarylate (PAR), etc. (FIGS. 2 and 3). However, FIGS. 3A to 3C are a partially broken front view, a top view, and a bottom view, respectively.

  On the axis P1 of the inner cylinder 11, there are an upward pouring hole 11a, an upward taper hole 11b opening in the bottom 11a1 of the pouring hole 11a, and a large-diameter concave portion 11c in the lower part in order from top to bottom. Is formed. A small groove 11b1 having a V-shaped cross section is formed on the inner surface of the taper hole 11b in the direction of the generatrix. An annular rib 11 d whose upper surface side is obliquely downward is formed on the outer periphery of the inner cylinder 11. In addition, a large-diameter flange 11e that is obliquely upward is formed on the outer peripheral lower portion of the inner cylinder 11 via a step portion 11e1, and each of the upper portion of the annular rib 11d and the lower portion of the flange 11e has smooth corners. It is formed in the upper end part and lower end part which round. A short parallel portion 11d1 parallel to the small groove 11b1 of the tapered hole 11b is formed in the annular rib 11d.

  The outer cylinder 12 is integrally formed of a soft synthetic resin such as low density polyethylene (LDPE), high density polyethylene (HDPE), or polypropylene (PP) (FIGS. 2 and 4). 4A to 4C are respectively a partially broken front view, a top view, and a bottom view.

  On the axis P2 of the outer cylinder 12, a dropping hole 12a that opens upward at the top and a closing pin 12b that hangs down from the lower portion of the dropping hole 12a are formed. The upper end of the closing pin 12b is supported via connecting portions 12b1, 12b1,... Formed radially in the radial direction of the lower inner surface of the dropping hole 12a. A fan-shaped opening is provided between the connecting portions 12b1, 12b1,. Portions 12b2, 12b2,... Are formed. A large-diameter flange 12c is formed at the outer peripheral intermediate portion of the outer cylinder 12, and the upper portion of the flange 12c is continuous with the upper end portion that smoothly rounds the corner portion, and the lower portion of the flange 12c surrounds the closing pin 12b. It is a skirt portion 12d.

  The closing pin 12b hangs long beyond the lower end of the skirt portion 12d, and the lower end portion of the closing pin 12b protruding from the skirt portion 12d is pointed downwardly in a tapered manner in accordance with the inner surface of the tapered hole 11b of the inner cylinder 11. It is Further, the inside of the skirt portion 12d is formed in a stepped cavity 12e that conforms to the outer shape of the upper portion of the flange 11e of the inner cylinder 11, and a ring that conforms to the annular rib 11d of the inner cylinder 11 is formed in the middle of the cavity 12e. The engaging groove 12f is formed.

  The outer cylinder 12 and the inner cylinder 11 can be vertically and coaxially combined on the common axis P and inserted into the mouth K1 of the chemical solution container K (FIG. 2). At this time, in the inner cylinder 11, the flange 11e is press-fitted into the mouth portion K1, and in the outer cylinder 12, the skirt portion 12d and the flange 12c seal the mouth portion K1 in a watertight manner. Further, the outer cylinder 12 is prevented from coming off when the annular rib 11d of the inner cylinder 11 is engaged with the engaging groove 12f, and the lower end portion of the closing pin 12b is inserted into the tapered hole 11b to close the tapered hole 11b. However, in the tapered hole 11b, the lower recess 11c, the inside of the chemical solution container K, and the upper dispensing hole 11a communicate with each other through a small groove 11b1 on the inner surface.

  A cap C is attached to the upper part of the chemical solution container K (FIG. 1).

  The cap C has a thickness tc substantially equal to that of the chemical solution container K so as to cover the mouth portion K1, shoulders K2, and K2 of the chemical solution container K as a whole, and is formed in a substantially half-moon-shaped lid shape having an open bottom. Yes. At the top of the cap C, a pair of locking portions C1 and C1 that are elastically engaged with the locking protrusions K1a and K1a of the mouth K1 are suspended, and are swallowed by the locking portions C1 and C1. In this way, a seal part C2 covering the top of the double inner plug 10 and a plug part C3 closing the dropping hole 12a are formed.

  The cap C is pushed in such a way that its longitudinal direction is aligned with the shoulders K2 and K2 of the chemical container K (in the direction of arrow A in FIG. 1), and the locking parts C1 and C1 are elastically pushed into the locking ridges K1a and K1a. By engaging, it can be attached to the chemical liquid container K integrally. At this time, the seal portion C2 at the top of the cap C is pressed against the top of the double inner plug 10, and the plug portion C3 can block the dripping hole 12a in a watertight manner. The plug portion C3 is formed in a downward tapered shape that fits the upward tapered dropping hole 12a.

  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 end edges C4 and C4 of the cap C ride on the shoulders K2 and K2 of the chemical solution container K (two-dot chain line in FIG. 1), and the cap C as a whole is detached from the chemical solution container K (same as above). The cap C can be driven in the direction opposite to the arrow A in the figure, and the locking portions C1, C1 are separated from the locking ridges K1a, K1a and separated from the chemical solution container K, and the dropping hole 12a is opened. Can do.

  When the cap C is removed in this way, a large pressing force is temporarily applied to the body portion of the chemical liquid container K. For example, if the chemical liquid adheres to the recess 11c at the lower end of the double inner plug 10, the chemical liquid Is driven in the direction of flowing out through the small groove 11b1 of the tapered hole 11b. However, by setting the effective sectional area of the small groove 11b1 to be sufficiently small, the outflow of the chemical solution due to such a temporary pressing force can be substantially eliminated. However, the specification of the related part at this time is as follows, for example (FIG. 5). That is, the diameter d of the tapered hole 11b of the inner cylinder 11 is set to the maximum diameter d1 = 1.0 mm, the minimum diameter d2 = 0.4 mm, the width w = 0.2 mm of the small groove 11b1, and the depth b = 0.15 mm. The thickness t = 1.0 mm of the bottom portion 11a1 and the maximum torque T when removing the cap C was 30 N · cm or less. However, FIGS. 5A and 5B are an enlarged view of a main part of FIG. 2 and an enlarged cross-sectional view corresponding to the line XX in FIG.

  It should be noted that the chemical container K after opening the cap C and being opened is turned upside down, and is continuously dropped and elastically deformed by continuously pushing the body (not shown) with fingers, and used. Can do. At this time, the small groove 11b1 of the tapered hole 11b forms a chemical liquid passage communicating from the inside of the chemical liquid container K to the pouring hole 11a, and the chemical liquid flows out to the dropping hole 12a through the small groove 11b1 and the pouring hole 11a. Because. The required pressing force at this time is, for example, 0.5 to 1.0 N (average 0.8 N) with respect to the previous specifications, and the required pressing time is at least 0.2 seconds or more. There is no sense of incongruity in use.

Other embodiments

  A pair of small grooves 11b1 formed in the tapered hole 11b of the inner cylinder 11 may be provided symmetrically about the axis (FIG. 6A). Further, the small groove 11b1 may be formed in a half-moon shape instead of being formed in a V-shaped cross-section ((B) in the figure). Further, the small groove 11b1 may be formed on the outer surface of the lower end portion of the closing pin 12b to be inserted into the tapered hole 11b, instead of the inner surface of the tapered hole 11b (FIG. 3C). The shape and number of the small grooves 11b1 can be set in any manner other than those shown in FIGS. 6A to 6C as long as the moldability of the inner cylinder 11 and the outer cylinder 12 is not impaired.

  Further, the small groove 11b1 on the inner surface of the tapered hole 11b can gradually reduce both the width w and the depth b from the top to the bottom of the tapered hole 11b (FIGS. 7A and 7B). That is, in FIG. 7, the width w and depth b of the small groove 11b1 are the maximum width w1 and the maximum depth b1 at the upper end, respectively, and the minimum width w2 and the minimum depth b2 at the lower end. However, FIGS. 7A and 7B are an enlarged cross-sectional view of the main part of the inner cylinder 11 and a view corresponding to the arrow Y in FIG.

  In addition, the whole shape of the chemical | medical solution container K and the cap C shall be arbitrarily changed irrespective of illustration. The cap C may be a general screw type that can be attached to and detached from the chemical liquid container K via a screw.

Overall configuration vertical section explanatory drawing 1 is an enlarged view of the main part of FIG. Configuration diagram of the inner cylinder Configuration diagram of outer cylinder Explanatory drawing of the main part of FIG. FIG. 5 (B) equivalent view showing another embodiment Main part expansion explanatory drawing which shows other embodiment.

Explanation of symbols

K ... Chemical liquid container K1 ... Mouth part P, P1, P2 ... Axle 10 ... Double inner plug 11 ... Inner cylinder 11a ... Outlet 11a1 ... Bottom 11b ... Tapered hole 11b1 ... Small groove 12 ... Outer cylinder 12a ... Drip hole 12b ... Occlusion pin 12b1 ... Connecting part

Patent applicant Shingo Chemical Co., Ltd.
Attorney Tadaaki Matsuda, Attorney

Claims (3)

  A double inner plug of a chemical container that is coaxially combined with an outer cylinder that integrally molds a soft synthetic resin and an inner cylinder that is integrally molded with a hard synthetic resin, and is inserted into the mouth of the chemical liquid container. The inner cylinder has an upward pouring hole formed on the shaft center, and an upward taper hole that opens at the bottom of the pouring hole and communicates with the inside of the chemical solution container. The outer cylinder has the pouring hole. A dropping hole that is continuous with the outlet hole and opens upward at the top; and a closing pin that hangs down on the axis and inserts a lower end portion into the tapered hole; an inner surface of the tapered hole; and a lower end portion of the closing pin A double inner plug of a chemical solution container is characterized in that a small groove for a chemical solution flow path communicating from the inside of the chemical solution container to the dispensing hole is formed on any one of the outer surfaces of the chemical solution container.   The double inner plug of a drug solution container according to claim 1, wherein the upper end of the closing pin is supported via a connecting portion formed radially in the radial direction of the lower inner surface of the dropping hole.   The double inner plug of the drug solution container according to claim 1 or 2, wherein a lower end portion of the closing pin is sharpened downward in accordance with an inner surface of the tapered hole.

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