JP2013095477A - Discharge container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge container which can prevent contamination caused by a microorganism and the unintended drop or drip of liquid.SOLUTION: A discharge container 1 is configured by assembling a plug body 11 to a mouth 9a of a double container 9 comprising an outer layer body 3, an inner layer body 5 and an outside air introduction hole 7 formed in a mouth 3a of the outer layer body 3. The plug body 11 includes a base 13, a tubular discharge valve 29 and a suction valve 31. In the plug body, a tubular body 13d is erected of which the tip is closed and which has a discharge hole 21 on its sidewall, and the base includes a suction hole 19 communicating to the outside air introduction hole 7. The tubular discharge valve is composed of an elastic material, closes an outlet of a feed path P for a content liquid and is elastically deformed by liquid pressure to be pushed to open, thereby allowing the content liquid to flow out via the outlet of the feed path P. The suction valve is composed of an elastic material, closes the suction hole 19 and is elastically deformed by negative pressure in the outer layer body to open the suction hole 19. At an inner edge of an upper end of the discharge valve 29, a projection 29a is formed which abuts on an outer surface of the tubular body 13d all over the circumference and seals the outlet of the feed path P.

Description

  The present invention relates to a container that discharges the content liquid contained therein, and more particularly, to a discharge container that can prevent the liquid once discharged from flowing back into the container and being contaminated by microorganisms.

  A so-called squeeze bottle-type container is known as a container that stores and discharges eye drops and the like, and discharges a liquid content from a nozzle by squeezing a container body. In such a discharge container, after the container body is squeezed and the content liquid is discharged, the content liquid and the outside air remaining in the nozzle are drawn into the container along with the restoration of the container body, There was a problem that microorganisms and microorganisms adhering to the nozzle were taken together, and the content liquid in the container was easily contaminated by microorganisms. For this reason, usually, preservatives are preliminarily added to eye drops etc. to prevent contamination by microorganisms, but the use of preservatives has drawbacks such as often causing eye irritation and allergic reactions. .

  In this regard, in Patent Document 1, in order to prevent microorganisms from entering the container, a laminated peeling bottle formed by laminating an inner layer that can be peeled off from the inner surface of the outer layer constituting the bottle body; A stopper attached to the mouth of the bottle, a membrane filter that allows passage of liquid while blocking passage of microorganisms, and once discharged content liquid returns to the inner layer. A container provided with a dispensing valve for prevention has been proposed.

JP 2002-263166 A

  However, since this type of container has a dispensing valve on the upstream side of the filter, the liquid accumulated between the dispensing valve and the filter flows out just by tilting the container, and unintentional dripping or liquid The dispensing valve has a cross-shaped cut and has an arcuate shape that is recessed in the inner direction in a normal state. When the internal pressure increases due to the pressing of the container It is composed of an elastic body that reversely deforms into an outward convex shape and opens a cut to allow the contents to flow out, and such a dispensing valve requires a relatively large pressure to reverse the elastic body. When it is desired to drop only one drop as in the case of an eye drop container, it is not possible to adjust the opening of the dispensing valve well and there is a possibility that several drops may be dropped continuously.

  Therefore, the present invention is a discharge container capable of preventing the liquid once discharged from flowing back into the container and being contaminated by microorganisms, etc., and can prevent unintentional dripping or dripping. It is an object of the present invention to provide a discharge container that can easily open the valve when squeezing and can drop the content liquid in units of one drop.

  The present invention has been made to solve the above problems, and a discharge container according to the present invention comprises an outer layer body and an inner layer body laminated inside the outer layer body so as to be peelable from the outer layer body. A double container in which an outside air introduction hole for introducing outside air between the outer layer body and the inner layer body is formed at the mouth of the inner container, and the contents liquid in the inner layer body is discharged by being assembled to the mouth of the double container A discharge container including a stopper, the stopper being a base that covers the mouth of the double container, for discharging the content liquid contained in the inner layer on the side wall of which the front end is closed. A cylindrical body having a discharge hole is erected, and is made of an elastic material and a base having an intake hole connected to the outside air introduction hole, and surrounds the cylindrical body and discharges from the discharge hole between the cylindrical body. Forming a feed path for the liquid content and exiting the feed path A cylindrical discharge valve portion that is closed while being elastically deformed and pushed open by the liquid pressure of the content liquid discharged from the discharge hole, and flows out the content liquid to the outside through the outlet of the feeding path, and an elastic material An intake valve portion that closes the intake hole and elastically deforms due to a negative pressure in the outer layer body due to volume reduction of the inner layer body when the content liquid is discharged, and opens the intake hole. The discharge valve portion is provided with a protrusion on the inner peripheral edge of the upper end that seals the outlet of the feeding path by contacting the outer surface of the cylindrical body over the entire circumference.

  In addition, in the discharge container of this invention, it is preferable to comprise the said protrusion so that it may line-contact with the outer surface of the said cylinder.

  In the discharge container of the present invention, it is preferable that the discharge valve portion and the intake valve portion are configured as an integrally molded product.

  Furthermore, in the discharge container of the present invention, it is preferable that the cylindrical body has a convex portion at the tip for joining the content liquid flowing out from the outlet of the feeding path.

  In the discharge container according to the present invention, when the user squeezes (squeezes) the body portion of the outer layer body, the inner layer body contracts (if there is air between the outer layer body and the inner layer body, the intake hole Is closed by the intake valve portion, the air between the outer layer body and the inner layer body is pressurized and the inner layer body contracts.), The liquid pressure of the content liquid in the inner layer body increases, The content liquid flows between the body and the discharge valve portion, and the upper end of the discharge valve portion is elastically deformed outward, and the content liquid in the inner layer is discharged through the discharge hole and the feed path. When the discharge of the content liquid is completed and the squeeze of the outer layer body is released, the outer layer body returns to its original shape due to its resilience, while the upper end of the discharge valve portion comes into close contact with the outer surface of the cylinder again, so that the inner layer The negative pressure between the body and the outer layer body causes the intake valve portion to be elastically deformed by the negative pressure to open the intake hole, and the outside air passes through the intake hole and the outside air introduction hole to be between the inner layer body and the outer layer body. Inflow.

  Therefore, according to the discharge container of the present invention, the discharge valve portion prevents backflow of the content liquid once discharged into the inner layer body, the inner layer body contracts as the content liquid decreases, and the outside air flows into the outer layer body. Since the liquid flows only between the inner layer body and the inner layer body, it is possible to prevent the mixture of microorganisms into the content liquid and the contact between the content liquid and the outside air. In addition, the upper end of the discharge valve portion surrounding the cylinder is elastically deformed so that the feeding path is opened, and the entire upper surface of the discharge valve portion is surrounded by the outer periphery of the cylinder. Since the outlet of the feed path is sealed by providing a protruding ridge, the opening of the discharge valve part can be adjusted with a smaller pressure than a conventional dispensing valve in which a cut is formed in the elastic body that is deformed in reverse. It is possible to drop the contents in units of one drop. Furthermore, since the protrusion of the discharge valve portion is always in contact with the outer surface of the cylindrical body when the outer layer body is not yet pressed, the liquid content does not flow out as long as the container is tilted. Dripping can be prevented. Furthermore, since the discharge valve part closes simultaneously with the end of the outer layer body compression (end of discharge), it is possible to provide a discharge container with good liquid drainage. Furthermore, a good sealing property (airtightness) can be ensured by the protrusion provided on the inner peripheral edge of the upper end of the discharge valve portion, and the liquid content can be reliably prevented from coming into contact with the outside air.

  Further, according to this discharge container, since the discharge valve portion is provided along the outer surface of the cylinder (that is, the portion excluding the tip of the cylinder is covered with the discharge valve portion), the cylinder The area exposed to the outside can be reduced, and the adhesion and propagation area of microorganisms can be reduced. Furthermore, according to this discharge container, since the cylinder is erected on the base and the discharge hole is opened in the side wall of the cylinder, the discharge container can be further downsized.

It is the front view which showed the principal part of the discharge container of embodiment according to this invention in the partial cross section. It is a figure which shows the use condition (state which squeezed the trunk | drum of the outer layer body) of the discharge container of FIG. It is a figure which shows the use condition (state which released the squeeze of the trunk | drum of an outer layer body) of the discharge container of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the discharge container of this invention can be used as other containers such as cosmetic containers as well as various drug containers such as eye drops containers.

  As shown in FIG. 1, the discharge container 1 includes an outer layer body 3 and a thin inner layer body 5 which is laminated inside the outer layer body 3 so as to be peelable from the outer layer body 3, and a mouth portion 3 a of the outer layer body 3. A double container (delami container) 9 formed by forming an outside air introduction hole 7 for introducing outside air between the outer layer body 3 and the inner layer body 5, and a mouth portion 9 a of the double container 9. A plug body 11 for discharging the content liquid in the body 5 is provided.

  The double container 9 includes the mouth portion (the mouth portion of the outer layer body 3 is denoted by reference numeral 3a and the mouth portion of the inner layer body 5 is denoted by reference numeral 5a) 9a and a shoulder portion (outer layer body) connected to the lower end of the mouth portion 9a. 3b is indicated by reference numeral 3b, and the shoulder of the inner layer body 5 is indicated by reference numeral 5b.) 9b, and a cylindrical body connected to the shoulder 9b (the body part of the outer layer body 3 is indicated by reference numeral 3c). The body 5 has a body portion denoted by reference numeral 5c.) 9c and a bottom portion (not shown) for closing the lower end of the body portion 9c. The body portion 3c of the outer layer body 3 has a squeeze-deformable thickness, and the inner layer body 5 is compressed by squeezing the outer layer body 3 (air is interposed between the outer layer body 3 and the inner layer body 5). If present, the inner layer body 5 is compressed by pressurizing the air.) Thus, the content liquid in the inner layer body 5 is discharged through the plug body 11. The inner layer body 5 can be contracted (that is, reduced in volume) as the content liquid decreases. Such a double container 9 is formed by, for example, coextruding an outer layer body 3 made of a high-density polyethylene resin and an inner layer body 5 made of a nylon resin that is incompatible with the high-density polyethylene resin into a laminated shape and blowing it. A laminated preform formed by molding, or by adhering and laminating an outer layer preform and an inner layer preform made of the same synthetic resin with a release layer interposed therebetween can be produced by biaxial stretch blow molding or the like.

  The plug body 11 is held in the mouth portion 9a of the double container 9 and covers the base 13 covering the mouth portion 9a, the valve member 15 held by the base 13, and the base 13 and the valve member 15 in the double container 9. And a mounting portion 17 attached to the mouth portion 9a.

  The base 13 has a ceiling wall 13a whose lower surface is in contact with the protruding end of the mouth portion 9a and opened on the inside, an inner cylindrical wall 13b standing from the inner peripheral edge of the ceiling wall 13a, and a slight radius from the upper portion of the inner cylindrical wall 13b. It has a horizontal annular wall 13c extending inward in the direction and a cylindrical body 13d that stands up from the inner peripheral edge of the horizontal annular wall 13c. Further, an inner ring 13e that is fitted into the mouth portion 5a of the inner layer body 5 is suspended from the back surface of the top wall 13a. Further, an outer cylinder wall 13f is formed on the outer edge of the top wall 13a so as to form an annular groove m1 between the top wall 13a and the inner cylinder wall 13b. A step S is formed between the upper part of the inner cylindrical wall 13b and the upper surface of the horizontal annular wall 13c to engage with a base part of a discharge valve part 29 described later. In addition, an air intake hole 19 that communicates with the outside air introduction hole 7 is formed in the top wall 13a of the base 13 through a gap g described later.

  The cylindrical body 13d is closed at the tip in a dome shape, and a discharge hole 21 for discharging the content liquid stored in the inner layer body 5 is formed on the side wall thereof. In this example, the discharge holes 21 are provided at two opposite positions on the circumference, but the number of the discharge holes 21 may be one or three or more. Further, a convex portion 23 protruding in the axial direction is provided at the tip of the cylindrical body 13d. The “axial direction” here means the extending direction of the cylindrical body 13 d, that is, the extending direction of the mouth portion 9 a of the double container 9.

  The mounting portion 17 mounts the base 13 and the valve member 15 to the mouth portion 9a of the double container 9, and the gap g is formed between the mouth portion 3a of the outer layer body 3 and the mouth portion 3a. A mounting cylinder wall 17a that surrounds and surrounds, a surrounding wall 17b that is connected to an upper portion of the mounting cylinder wall 17a and encloses the outer cylinder wall 13f of the base 13, and a valve member 15 that stands up from an upper inner edge of the surrounding wall 17b And a pressing wall 17c for pressing and holding. A through hole 24 that communicates the annular groove m1 and the outside is formed in the pressing wall 17c. The lower portion of the mounting cylindrical wall 17a is hermetically abutted and sealed against the enlarged diameter portion 25 formed at the lower end portion of the mouth portion 3a of the outer layer body 3, and the enlarged diameter portion 25 of the mouth portion 3a of the outer layer body 3 is sealed. It is fixed to the mouth 3 a of the outer layer body 3 by undercut fitting to the protrusion 27 formed below.

  The valve member 15 is made of an elastic material such as silicon rubber. The valve member 15 surrounds the cylinder 13d and forms a supply path P of the content liquid discharged from the discharge hole 21 with the cylinder 13d. At the same time, the outlet of the feeding path P is closed, while being elastically deformed by the liquid pressure of the contents liquid discharged from the discharge hole 21 and pushed open, the contents liquid flows out to the outside through the outlet of the feeding path P. The negative pressure in the outer layer body 3 (between the outer layer body 3 and the inner layer body 5) due to the volume reduction of the inner layer body 5 when the content liquid is discharged while closing the cylindrical discharge valve portion 29 and the intake hole 19 And an intake valve portion 31 that is elastically deformed to open the intake hole 19. The discharge valve portion 29 and the intake valve portion 31 may be configured as separate parts.

  The discharge valve portion 29 is elastically deformed and pushed open when the outer layer body 3 is squeezed to allow the discharge of the content liquid, while when the squeeze of the outer layer body 3 is released, it is restored to its original shape and again. It functions as a check valve that prevents the backflow of the discharged content liquid and the intrusion of outside air in close contact with the outer surface of the cylinder 13d. Specifically, the discharge valve portion 29 extends along the outer surface shape of the cylindrical body 13d, and the lower end portion thereof is supported between the horizontal annular wall 13c and the step S. Moreover, the outer peripheral surface of the part between the front-end | tip part and lower end part of the discharge valve part 29 is contact | abutting to the press wall 17c, and the excessive movement and deformation | transformation to the radial direction outer side of this part are controlled. The upper end of the discharge valve portion 29 is disposed in proximity to the convex portion 23 provided at the tip of the cylindrical body 13d. Here, “proximity” means close enough that the upper end of the discharge valve portion 29 does not contact the convex portion 23.

  Further, the discharge valve portion 29 is provided with a ridge 29a at the inner peripheral edge of the upper end thereof for contacting the outer surface of the cylindrical body 13d over the entire circumference and sealing the outlet of the feeding path P. In this example, the protrusion 29a is formed in a circular arc shape in cross section, and is configured to be in line contact with the outer surface of the cylindrical body 13d. In addition, the protrusion 29a is not limited to a circular arc shape in cross section, and may be formed in a cross-sectional mountain shape with a sharp tip.

  The intake valve portion 31 has a conical taper shape that extends while tilting downward after passing through a base portion 31 a extending substantially horizontally from the outer peripheral surface of the discharge valve portion 29, and the lower peripheral edge of the lower end of the mounting portion 17. It is elastically in contact with the inner peripheral surface of the surrounding wall 17b in an airtight manner. The intake valve portion 31 prevents the compressed air in the inner layer body 5 and the outer layer body 3 from leaking outside through the intake hole 19 when the outer layer body 3 is squeezed to discharge the content liquid. On the other hand, when a negative pressure is generated between the outer layer body 3 and the inner layer body 5 by releasing the squeeze of the outer layer body 3, the check valve is elastically deformed by the negative pressure to open the intake hole 19 and allow the introduction of the outside air. Serves as a function.

  Further, in this embodiment, the discharge container 1 includes a cap 33 that covers and conceals the plug body 11 and is fitted and held on the outer surface of the mounting cylinder wall 17a. The cap 33 has a cap on the top surface thereof. In the state where 33 is mounted, it has a dome-shaped presser portion 33a that abuts on the tip end portion of the discharge valve portion 29 and presses the inner peripheral edge of the upper end of the discharge valve portion 29 against the tip end portion of the cylindrical body 13d. In this example, the cap 33 is held on the outer surface of the mounting cylinder wall 17a by screw fitting, but may be held on the mounting cylinder wall 17a by an engaging means such as an undercut instead of the screw ( (Not shown).

  In the discharge container 1 having such a configuration, when the cap 33 is removed and the user squeezes the body portion 3c of the outer layer body 3, the inner layer body 5 contracts as shown in FIG. (When air is present between the outer layer body 3 and the inner layer body 5, the intake hole 19 is closed by the intake valve portion 31, so the air between the outer layer body 3 and the inner layer body 5 is pressurized. The inner layer body 5 contracts.), The liquid pressure of the content liquid in the inner layer body 5 increases, and the liquid pressure circulates between the cylindrical body 13d and the discharge valve portion 29 by this liquid pressure, and the discharge valve portion 29 The upper end is elastically deformed toward the outside, and the content liquid in the inner layer body 5 is discharged through the discharge hole 21 and the feeding path P. When the discharge of the content liquid is completed and the squeeze of the outer layer body 3 is released, as shown in FIG. 3, the outer layer body 3 returns to its original shape due to its restoring property, while the upper end of the discharge valve portion 29 is formed in the cylindrical body 13d. Since the inner layer body 5 and the outer layer body 3 are brought into close contact with the outer surface of the inner layer again, a negative pressure is generated. The negative pressure causes the intake valve portion 31 to be elastically deformed and the intake hole 19 is opened. Then, the air flows between the inner layer body 5 and the outer layer body 3 through the intake hole 19, the gap g formed between the outer wall of the mouth 3 a of the outer layer body 3 and the mounting cylinder wall 17 a, and the outer air introduction hole 7. .

  Therefore, according to the discharge container 1, the discharge valve portion 29 prevents the back-flow of the content liquid once discharged into the inner layer body 5, and the inner layer body 5 contracts as the content liquid decreases, so that the outside air Since it flows only between the outer layer body 3 and the inner layer body 5, it is possible to prevent the mixture of microorganisms into the content liquid and the contact between the content liquid and the outside air. In addition, the upper end of the discharge valve portion 29 surrounding the cylinder 13d is elastically deformed so that the feed path P is opened, and the outer surface of the cylinder 13d is formed on the inner periphery of the upper end of the discharge valve portion 29. Since the protrusion 29a that contacts the entire circumference is provided to seal the outlet of the feed path P, discharge is performed with a pressure smaller than that of a conventional dispensing valve in which a cut is formed in the elastic body that is deformed in reverse. The opening of the valve part 29 can be adjusted, and the contents can be dropped in units of one drop. Further, in a state where the cap 33 is removed and the body portion 3c of the outer layer body 3 is not yet pressed (hereinafter referred to as “when not pressed”), the protrusion 29a of the discharge valve portion 29 is formed on the outer surface of the cylindrical body 13d. Since it is always in contact, the content liquid does not flow out as long as the container 1 is tilted, and unintentional dripping or dripping when not pressed can be prevented. Furthermore, since the discharge valve part 29 closes simultaneously with completion | finish of pressing of the trunk | drum 3c of the outer-layer body 3 (end of discharge), the discharge container 1 with favorable liquid discharge can be provided. Furthermore, a good sealing property (airtightness) can be ensured by the protrusions 29a provided on the inner peripheral edge of the upper end of the discharge valve portion 29, and the content liquid can be reliably prevented from coming into contact with the outside air.

  Moreover, according to this discharge container 1, since the discharge valve part 29 was provided along the outer surface of the cylinder 13d (that is, it was set as the structure which covers the part except the front-end | tip of the cylinder 13d with the discharge valve part 29). ), The area exposed to the outside of the cylinder 13d can be reduced, and the adhesion and propagation area of microorganisms can be reduced. Furthermore, according to the discharge container 1, since the cylindrical body 13d is erected on the base 13 and the discharge hole 21 is opened on the side wall of the cylindrical body 13d, the discharge container 1 is further downsized. be able to.

  Furthermore, in the discharge container 1 of this embodiment, since the protrusion 29a is configured to be in line contact with the outer surface of the cylindrical body 13d, the sealing performance of the discharge valve portion 29 with respect to the outer surface of the cylindrical body 13d is improved. The unintentional dripping and dripping at the time of unpressing can be prevented more reliably.

  Furthermore, in the discharge container 1 of this embodiment, since the discharge valve portion 29 and the intake valve portion 31 are integrally formed, the structure can be simplified and the discharge container 1 can be made compact.

  Furthermore, in the discharge container 1 of this embodiment, since the convex part 23 which joins the content liquid which flowed out from the exit of the feed path P was provided in the front-end | tip of the cylinder 13d, the discharged content liquid is It can be dripped smoothly and can improve liquid cutting property further. Moreover, in the discharge container 1 of this embodiment, since the upper end of the discharge valve part 29 used as the exit of the supply path | route P was arrange | positioned close to the convex part 23, it remains on the outer surface of the cylinder 13d after dripping. The liquid can be reduced, and the growth of microorganisms on the cylinder 13d can be suppressed.

  Furthermore, according to the discharge container 1 of this embodiment, the top surface of the cap 33 is in contact with the upper end portion of the discharge valve portion 29 in a state where the cap 33 is mounted, and the inner peripheral edge of the upper end of the discharge valve portion 29 is the cylindrical body 13d. Since the presser portion 33a that is pressed against the distal end portion is provided, leakage of the content liquid from the discharge valve portion 29 during distribution or the like can be reliably prevented.

  Moreover, according to the discharge container 1 of this embodiment, since the configuration in which the valve member 15 is sandwiched between the base 13 and the mounting portion 17 is adopted, it is possible to prevent the valve member 15 from being loose. And high valve function (airtightness) can be maintained.

  Thus, according to the present invention, it is a discharge container that can prevent the liquid once discharged from flowing back into the container and being contaminated by microorganisms, etc., and can prevent unintentional dripping or dripping. The valve can be easily opened when squeezed, and it is possible to provide a discharge container capable of dropping the content liquid in units of one drop.

DESCRIPTION OF SYMBOLS 1 Discharge container 3 Outer layer body 5 Inner layer body 7 Outside air introduction hole 9 Double container 11 Plug body 13 Base 13d Cylindrical body 15 Valve member 17 Mounting part 19 Intake hole 21 Discharge hole 29 Discharge valve part 31 Intake valve part 33 Cap 33a Holding part

Claims (4)

An outer layer body and an inner layer body laminated inside the outer layer body so as to be peelable from the outer layer body are formed, and an outside air introduction hole for introducing outside air between the outer layer body and the inner layer body is formed at the mouth of the outer layer body. A discharge container equipped with a double container and a stopper that is assembled to the mouth of the double container and discharges the content liquid in the inner layer,
The plug body is a base that covers the mouth of the double container, and has a cylindrical body having a discharge hole for closing the end and discharging the content liquid contained in the inner layer inside the side wall. And a base having an intake hole connected to the outside air introduction hole, and made of an elastic material, surrounding the cylinder and forming a supply path for the content liquid discharged from the discharge hole between the cylinder and the cylinder. A cylindrical shape that closes the outlet of the feeding path and is elastically deformed and pushed open by the liquid pressure of the contents liquid discharged from the discharge holes and flows the contents liquid to the outside through the outlet of the feeding path. An intake valve that is made of an elastic material and closes the intake hole while opening the intake hole by being elastically deformed by a negative pressure in the outer layer body due to volume reduction of the inner layer body when the content liquid is discharged And
A discharge container characterized in that a ridge is provided on the inner peripheral edge of the upper end of the discharge valve portion so as to abut the entire outer surface of the cylindrical body and seal the outlet of the feed path.   The discharge container according to claim 1, wherein the protrusion is configured to be in line contact with an outer surface of the cylindrical body.   The discharge container according to claim 1 or 2, wherein the discharge valve portion and the intake valve portion are configured as an integrally molded product.   2. The discharge container according to claim 1, wherein the cylindrical body has a convex portion that joins the content liquid flowing out from the outlet of the feeding path at a tip thereof.

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