JP2005103153A - Chemical liquid container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise operability when a chemical liquid is made to flow out, regarding a chemical liquid container which is suitable for application, e.g., an eye dropper to be elastically deformed by pressurizing a body part, so as to discharge a small amount of chemical liquid. <P>SOLUTION: A nozzle part 11 having an outlet 11b is integrally molded with the body part 12 by injection molding. Thin parts 12b, 12b are arranged on the two facing surfaces of the square cylinder body part 12. The internal chemical liquid is made to flow out by pressurizing the thin parts 12b, 12b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chemical solution container suitable for an application in which a body portion is pressed and elastically deformed to dispense a small amount of chemical solution, such as an eye drop container.

  A small chemical container that is used by pressing and elastically deforming the body portion to dispense a small amount of chemical liquid is generally manufactured by blow molding or vacuum molding (for example, Patent Document 1).

Blow molding is a process in which a thermoplastic is heated and softened and extruded as a parison, and the parison is sandwiched between molds and air is blown into the interior to cool and solidify the product. Vacuum molding is a heat-softened parison. Is made with a mold, and the air between the parison and the mold is exhausted to make a product. These molding methods have an advantage that the mold cost can be reduced because it is sufficient to prepare only a mold for defining the outer shape of the product.
JP 2001-120638 A

  According to such prior art, blow molding and vacuum molding cannot actively control the thickness of the product. Therefore, when a part of the body is pressed and elastically deformed, only a specific part is made thin. Therefore, there is a problem that it is essentially difficult to make it easily elastically deformed and it is not easy to realize good operability. Further, if the nozzle part is molded after the chemical solution is filled in order to shorten the chemical solution filling time, the mold becomes complicated and expensive, and the molding process and the filling process are complicated, and the respective processes cannot be separated. There was also a problem.

  Therefore, in view of the problems of the prior art, the object of the present invention is to form the main body by injection molding, and provide a seal film and a bottom lid on the bottom of the main body, thereby providing a thin portion for pressing on the body, thereby improving operability. It is providing the chemical | medical solution container which does not have a possibility of producing the problem regarding the filling process of a chemical | medical solution.

  In order to achieve this object, the structure of the present invention includes a main body that integrally forms a nozzle portion and a body portion having a spout by injection molding, a seal film that seals the bottom portion of the main body after filling with a chemical solution, and a bottom portion of the main body And a bottom lid that protects the sealing film and is provided with a thin portion for pressing on the body.

  The seal film may be a plastic film or a laminate film in which a plastic film and an aluminum foil are laminated.

  In addition, the spout is formed by combining a plurality of chemical liquid passages formed on the outer periphery of the dome-shaped top portion protruding in the same direction as the nozzle portion, and a through hole communicating with the trunk portion at each lower end of the chemical liquid passage. Can do.

  In addition, each chemical | medical solution channel | path is parallel to the axial center of a top part, can open | release in the radial direction of a top part, and forms the common edge larger diameter than the outer diameter of a top part in the lower part of each chemical | medical solution channel | path. Can do.

  According to such a configuration of the invention, since the main body to be injection-molded can be freely controlled in thickness through the female mold and the male mold, a thin portion for pressing is provided in the trunk portion, and a part of the trunk portion is provided. By pressing, the body portion can be appropriately elastically deformed through the thin-walled portion, and a predetermined amount of chemical solution can be discharged from the spout of the nozzle portion. However, the thin portion may be provided at one location on the peripheral side surface of the body portion, or may be provided on two opposing surfaces. In addition, the actual pressing portion of the body portion may be the thin portion itself, or may be a thick portion or an intermediate thick portion provided in the region of the thin portion. That is, the “thin portion for pressing” refers to a thin portion formed in the body portion in order to elastically deform the body portion by pressing, and does not necessarily mean a pressed portion.

  Since the bottom of the main body with the nozzle is largely open in order to pull out the male mold, filling the chemical with this opening makes it possible to form the main body and fill the chemical. The process can be completely separated, and the filling time of the chemical solution can be extremely shortened. However, the bottom of the main body is sealed through a seal film immediately after the completion of filling with the chemical solution, and maintains a high degree of cleanliness. The main body is preferably made of a hard thermoplastic material such as polyethylene terephthalate or polyethylene naphthalate from the viewpoints of chemical resistance, low oxygen permeability, and excellent ultraviolet absorption.

  As the sealing film, a plastic film of the same type as the main body or a plastic film compatible with the plastic material of the main body is used in order to heat-weld and heat-seal the main body. In addition, mechanical strength, gas barrier property, handling property, etc. can be improved by making a sealing film into the laminated film of a plastic film and aluminum foil. However, at this time, the plastic film side is the inner side and the aluminum foil side is the outer side, and heat sealing is performed by heat welding to the main body via the plastic film.

  The spout can combine a chemical solution passage formed on the outer periphery of the top of the dome with a through hole at the lower end of each chemical solution passage, so that a substantially constant amount of chemical solution can be properly dropped regardless of the tilt angle of the main body. it can. When the main body is tilted, the chemical liquid in the main body leaks into the chemical liquid passage through the through holes, fills the chemical liquid passage, forms water droplets on the outer surface of the top, and can be dripped almost by a constant amount. . When the main body is returned to the original upright posture, the chemical liquid on the outer surface of the top portion including the inside of the chemical liquid passage smoothly returns into the main body through the through-hole, and there is no possibility of dripping under the top portion. However, the cross-sectional area of each chemical solution passage is formed to a size that can be easily filled with the chemical solution due to the surface tension of the chemical solution, and the through hole corresponding to each chemical solution passage is located at the top in the cross-sectional area of the chemical solution passage. It is preferable to open at a position closest to the axis.

  Each chemical solution passage has a U-shaped cross section, a V-shaped cross section, an elliptical cross section, a U-shaped cross section, etc., and is opened in the radial direction of the top in parallel with the axis of the top. The internal chemical solution can be smoothly returned into the main body by holding the main body and returning the main body to the upright posture.

  The common edge formed in the lower part of each chemical solution passage prevents the chemical solution from flowing down and more effectively prevents dripping when the main body is returned to the upright posture. In addition, an edge shall be larger than the outer diameter of the lower end of a top part, and shall protrude and form the outer side of a top part.

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

  The chemical solution container includes a main body 10 that integrally forms the nozzle portion 11 and the body portion 12 by injection molding, a seal film 21 that seals the bottom portion of the main body 10, and a bottom lid 22 that is attached to the bottom portion of the main body 10 ( FIG. 1, FIG. 2). However, FIGS. 1 and 2 are a front view and a side view, respectively, partially broken away.

  The nozzle portion 11 protrudes in a dome shape from one end of the body portion 12 via a gentle shoulder portion 13 on the axis C of the main body 10. On the outer surface of the nozzle portion 11, a pair of left and right engaging projections 11 a and 11 a are formed, and a spout 11 b is formed on the axis C in the nozzle portion 11. The spout 11b is opened obliquely toward the tip of the nozzle part 11, and an orifice is formed through a step 11c in the middle part of the nozzle part 11 (FIGS. 1 and 3A). . However, FIG. 3A is a cross-sectional view corresponding to the line XX in FIG.

  The trunk | drum 12 is formed in the flat rectangular tube shape (FIG. 1, FIG. 2). The cross section of the body portion 12 is formed by forming an obtuse hypotenuse at one corner of the rectangle, thinning the two opposing surfaces on the long side to form thin portions 12b and 12b, and opposing the short side 2 The surface is formed thick. However, the inner surface of the body portion 12 is provided with a slight draft downward downward without causing a bulging portion or a protruding portion on the inner surface side in order to extract the male mold at the time of injection molding from the bottom portion. The two sides on the long side are smoothly thickened toward the lower end, and the entire circumference is substantially uniform at the lower end.

  The seal film 21 is thermally welded to the bottom of the main body 10 after filling with the chemical solution, and seals the bottom. The seal film 21 may be a plastic film that is the same or compatible with the main body 10, or may be a laminate film that integrally laminates a plastic film that is the same or compatible with the main body 10 and an aluminum foil. However, in the latter case, the sealing film 21 is thermally welded to the bottom of the main body 10 through the plastic film with the plastic film on the inside and the aluminum foil on the outside.

  The bottom cover 22 has a shape that fits the bottom of the main body 10, covers the seal film 21 at the bottom of the main body 10 from the outside, and protects the seal film 21. The bottom cover 22 is formed by elastically fitting engagement protrusions 22a formed on the entire inner periphery of the upper portion with engagement recesses 12a formed on the entire outer periphery of the lower end portion of the body 12 (see FIG. 3 (B)), it can be attached to the bottom of the main body 10 by one behavior. However, FIG. 3B is an exploded view of the main part of FIG.

  A cap 30 is attached to the main body 10 (FIGS. 1 and 2). The cap 30 is formed in a substantially symmetric outer shape with the main body 10 including the bottom cover 22, and the top surface of the cap 30 is elastically engaged with the engagement protrusions 11 a and 11 a of the nozzle portion 11. Engaging claws 31 and 31 are suspended (FIGS. 1 and 3C), and a plug member 32 for sealing the spout 11b of the nozzle portion 11 is mounted between the engaging claws 31 and 31. Yes. However, FIG. 3 (C) is a view corresponding to the arrow line YY in FIG. A reinforcing rib 31 a is formed on the back side of each engaging claw 31.

  The plug member 32 is formed in a thick disk shape (FIGS. 1 and 3D), and a cylindrical plug body 32a is suspended from the lower surface. FIG. 3D is an enlarged perspective view of a main part of FIG. The plug body 32 a is adapted to the spout 11 b of the nozzle part 11. The plug member 32 is integrally formed of a soft plastic material such as low density polyethylene, polypropylene, or polymethylpentene.

  The cap 30 can be detachably attached to the main body 10 by elastically engaging the engaging claws 31 and 31 with the engaging protrusions 11a and 11a of the nozzle portion 11 (FIGS. 1 and 2). Each two-dot chain line). The cap 30 covers the nozzle portion 11 and the shoulder portion 13 of the main body 10, and the entire circumference of the lower end contacts the step portion 13 a at the lower end of the shoulder portion 13 and is positioned. In addition, the plug body 32a of the plug member 32 on the cap 30 side is press-fitted into the spout 11b of the nozzle portion 11, and the spout 11b can be closed in a watertight manner. Moreover, the cap 30, the main body 10, and the bottom cover 22 at this time are combined together as a whole, and an almost smooth surface with a neat appearance can be realized.

  When the cap 30 is removed, the spout 11b of the nozzle portion 11 is opened, the main body 10 is held downward with fingers, and the thin portions 12b and 12b on the two long sides of the trunk portion 12 are pressed (see FIG. 2). In the direction of the arrow), the thin portions 12b and 12b are elastically deformed inward, and the chemical solution in the main body 10 can be dropped as water droplets W1 through the spout 11b of the nozzle portion 11 to be instilled (FIG. 4). That is, the thin-walled portions 12b and 12b of the trunk portion 12 are used for pressing that is elastically deformed by pressing with fingers.

Other embodiments

  In the body portion 12, the pressing thin portion 12 b may be provided in a wide horizontal band shape with respect to each intermediate portion on the two long sides of the body portion 12 (FIG. 5). You may provide in a square window shape with respect to each center part of a surface (FIG. 6). Further, an island-like intermediate thick portion 12c may be additionally formed in the region of each thin portion 12b with respect to the embodiments of FIGS. 5 and 6 (FIGS. 7 and 8). 5 to 8, the engaging protrusion 11a on the outer surface of the nozzle portion 11 is formed in a single ring shape having an upper surface and a lower surface formed on an inclined surface.

  Moreover, the main body 10 and the bottom cover 22 may be formed in a substantially circular cross section, and a thin portion 12b for pressing may be formed on one side of the peripheral side surface (FIG. 9). In addition, in the nozzle part 11 of FIG. 9, in order to mount | wear with the screw-type cap which is not shown in figure, the external thread 11d is formed. However, in FIGS. 5-9, each figure (A) and (B) is a partially broken front view and side view, respectively, and FIG.9 (C) is the upper surface of the same figure (B). FIG.

  The spout 11b of the nozzle portion 11 includes a plurality of chemical liquid passages 11f, 11f formed on the outer periphery of a dome-shaped top portion 11e protruding in the same direction as the nozzle portion 11, and through holes 11g, 11g at the lower ends of the respective chemical liquid passages 11f. Can be formed as a combination with (FIG. 10). However, FIG. 10A is an enlarged vertical sectional view of a main part, and FIG. 10B is a top view of FIG.

  11 f of each chemical | medical solution channel | path is formed in parallel with the common axial center C of the main body 10, the nozzle part 11, and the top part 11e, has a long axis in the radial direction of the top part 11e, and is a cross-sectional ellipse opened to the radial direction of the top part 11e. It is formed in a shape. Further, the lower end of each chemical liquid passage 11f communicates with the inside of the nozzle portion 11, that is, the body portion 12 through a through hole 11g that opens at a position closest to the axis C within the cross-sectional area of the chemical liquid passage 11f. The through holes 11g are formed in parallel with the axis C, and the chemical liquid passages 11f and the through holes 11g are arranged at equal intervals around the top portion 11e.

  A common edge 11h is formed in the lower part of each chemical liquid passage 11f. The edge 11h is formed larger in diameter than the outer diameter of the lower end of the top portion 11e, and protrudes in a ring shape in the radial direction of the nozzle portion 11 and the top portion 11e. In addition, the lower end of each chemical | medical solution channel | path 11f and the upper end of the through-hole 11g are smoothly continuing toward the upper surface of the edge 11h.

  The cap 30 adapted to the nozzle portion 11 in FIG. 10 is formed by attaching a seal member 30b to the top surface of the outer cap 30a integrally formed in a double cylinder shape (solid line in FIG. 11). However, the internal thread 33 that matches the external thread 11d on the nozzle portion 11 side is formed in the inner cylinder portion of the outer cap 30a, and a storage portion 34 that stores the top portion 11e of the nozzle portion 11 is formed on the lower surface of the seal member 30b. A seal portion 35 corresponding to the edge 11h is formed at the lower end of the seal member 30b. For the sealing member 30b, when the outer cap 30a of the main body 10 and the cap 30 is made of a hard material, an appropriate soft material is selected.

  The cap 30 can detachably seal the nozzle portion 11 of the main body 10 via the male screw 11d and the female screw 33 (two-dot chain line in FIG. 11). This is because the seal portion 35 of the seal member 30b comes into contact with the upper surface of the edge 11h of the nozzle portion 11 and elastically deforms to seal the upper surface of the edge 11h in a ring shape.

  When the cap 30 is removed and the main body 10 is turned downward (FIG. 12A), the chemical liquid in the main body 10 leaks into the chemical liquid passages 11f, 11f... Through the through holes 11g, 11g. In addition to filling the chemical passages 11f, 11f,..., Water droplets W1 are formed at the bottom of the tip of the top 11e. Therefore, a substantially constant amount of the chemical solution can be instilled correctly by dropping one drop of the water droplet W1. On the other hand, when the main body 10 is tilted obliquely (FIG. 12 (B)), the chemical liquid leaking into the chemical liquid passages 11f, 11f,... (In the arrow direction in the figure) forms a water droplet W1 at the bottom of the top portion 11e. It is possible to instill by dropping one drop of the water drop W1. In addition, when dripping a chemical | medical solution and instilling in this way, the trunk | drum 12 of the main body 10 can be pressed suitably, can be elastically deformed, and a chemical | medical solution can be forced out.

  When the main body 10 is returned to the upright posture from the state shown in FIGS. 12A and 12B, the chemical liquid adhering to the outer surface of the top portion 11e is transferred to the inside of the body portion 12 of the main body 10 through the through holes 11g, 11g. Return to smoothly. A draining edge 11h is formed at the lower part of the top part 11e, and most of the chemical liquid on the top part 11e is in the chemical liquid passages 11f, 11f... This is because a through-hole 11 g communicating with 12 is opened.

  10-12, the chemical | medical solution channel | paths 11f, 11f ... formed in the outer periphery of the top part 11e are not restricted to 4 illustrations, Arbitrary multiple articles | strands can be provided at equal intervals, or at unequal intervals. The cross-sectional shape of each chemical solution passage 11f may be deformed into a V shape, a U shape, a U shape, or the like that opens in the radial direction of the top portion 11e, instead of an oval shape.

  In the above description, the cross-sectional shape of the body portion 12 may be an ellipse, a square, a flat polygon, or the like instead of the illustrated rectangle or circle. Moreover, the thin part 12b for a press may be provided in one place with respect to the peripheral side surface of the trunk | drum 12 (for example, FIG. 9), and may be provided in two surfaces which oppose (for example, FIGS. 1-8). . In addition, this invention can be conveniently used not only as an eye drop container but as another arbitrary chemical | medical solution container.

Front view of overall configuration Overall configuration side view Explanatory drawing of essential parts Usage diagram Whole structure explanatory drawing which shows other embodiment (1) Whole structure explanatory drawing which shows other embodiment (2) Whole structure explanatory drawing which shows other embodiment (3) Whole structure explanatory drawing which shows other embodiment (4) Whole structure explanatory drawing which shows other embodiment (5) Main part expansion explanatory drawing (1) which shows other embodiment. Main part expansion explanatory drawing (2) which shows other embodiment. Operation explanatory diagram showing another embodiment

Explanation of symbols

C ... Axis center 10 ... Main body 11 ... Nozzle part 11b ... Outlet 11e ... Top part 11f ... Chemical solution passage 11g ... Through hole 11h ... Edge 12 ... Body part 12b ... Thin part 21 ... Seal film 22 ... Bottom cover

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

Claims (6)

  A main body that integrally forms a nozzle portion and a body portion having a spout by injection molding, a seal film that seals the bottom of the main body after filling with a chemical solution, and a bottom that is attached to the bottom of the main body and protects the seal film A chemical solution container comprising a lid, and a thin portion for pressing is provided on the body portion.   The chemical solution container according to claim 1, wherein the seal film is a plastic film.   The chemical container according to claim 1, wherein the seal film is a laminate film in which a plastic film and an aluminum foil are laminated.   The spout is formed by combining a plurality of chemical liquid passages formed on the outer periphery of a dome-shaped top that protrudes in the same direction as the nozzle portion, and a through hole communicating with the barrel at each lower end of the chemical liquid passage. The chemical container according to any one of claims 1 to 3, wherein:   5. The chemical solution container according to claim 4, wherein each of the chemical solution passages is parallel to the axis of the top and opens in a radial direction of the top.   6. The chemical solution container according to claim 4 or 5, wherein a common edge having a diameter larger than an outer diameter of the top portion is formed in a lower portion of each chemical solution passage.

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