JPH09150856A - Nozzle structure in one-push squeeze type liquid container - Google Patents

Abstract

(57) [Summary] (Correction) [Problem] To provide a one-push squeeze type liquid container in which liquid dripping is more reliably prevented by devising a nozzle. SOLUTION: A liquid storage space is formed in the nozzle tip opening portion 7, or the outer surface shape of the nozzle tip opening portion is formed into a square shape with rounded corner portions, and the liquid storage chamber 2 is pressurized to pressurize the liquid storage chamber. When the required amount of liquid is dropped from the nozzle tip opening and the pressure in the liquid storage chamber is released, the liquid adhering to the nozzle tip opening is sucked into the container by the restoring force of the container. The front is sealed,
A one-push squeeze that is a liquid container in which the seal portion is opened by the needle body at the start of use, and the needle body has a modified cross section and forms a liquid retaining space in the seal portion after opening. Nozzle structure in a liquid container.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cyanoacrylate.
A container containing a liquid such as an adhesive, eye drops, or cosmetic liquid, more specifically, by pressurizing the liquid storage chamber, a required amount of liquid in the liquid storage chamber can be dropped from the nozzle tip opening, The present invention relates to a nozzle structure in a liquid container (hereinafter, referred to as a one-push squeeze liquid container) in which a liquid attached to a nozzle tip opening is sucked into the container by a restoring force of the container when the pressure in the liquid storage chamber is released. In particular, when the pressure in the liquid storage chamber is released,
Most of the liquid adhering to the nozzle tip opening due to the restoring force of the container is sucked into the container, but when there is a large amount of residual liquid that is not sucked into the container and adheres to the nozzle tip opening, the residual liquid nozzle opening The present invention relates to a nozzle structure in a one-push squeeze type liquid container that prevents a phenomenon (hereinafter, referred to as liquid sag) that goes around an outer surface of a nozzle portion.

[0002]

2. Description of the Related Art Conventionally, typical examples of one-push squeeze type liquid containers include the inventions disclosed in JP-B-7-49308 and JP-A-60-158070.

According to the scope of the invention, the structure of the invention disclosed in Japanese Patent Publication No. 7-49308 is described as "at least a flexible bullet container filled with an adhesive solution and a flexible elastic bottle container. A quiz-type flexible elastic outer case body that has a sealed space inside to accommodate the upper end drip beak protruding outward, and that can be pressed freely from the outside to be hermetically packaged, and the flexible bottle inner container tip drip beak It is a one-push squeeze type double-structured adhesive packaging container consisting of a cap and a cap that collectively enclose the mouth and the upper end of the flexible elastic outer case body.

The structure of the invention disclosed in Japanese Patent Laid-Open No. 60-158070 is, according to the claims,
"The outer cylinder (1) which is open at the base end side and the front end side and which is not deformed by the pressure from the radial direction, and which is fitted into the outer cylinder (1) and has a nozzle on the front end side, Inner container (2) for liquid encapsulation, which is recessed inward by pressing from the outside toward the base end side, but restores to its original shape by releasing the pressure, engages with the outer cylinder (1) from behind the inner container (2) Alternatively, when the inner container (2) is fitted inside to support the inner container (2) in the outer cylinder (1), and when the finger pressure is applied, the pressing portion that pushes the base end side of the inner container (2) from behind and the finger pressure is stopped. A support body (3) having an elastic structure that restores this to a non-pressing posture,
Therefore, the container is configured such that one drop of the content is discharged from the tip of the nozzle of the inner container (2) by a single finger pressure from the back of the support (3).

[0005]

The basic principle of the above-mentioned prior art is to pressurize the liquid storage chamber so that the required amount of liquid in the liquid storage chamber is dropped from the nozzle tip opening to release the pressure in the liquid storage chamber. As a result, it is a container in which excess liquid attached to the nozzle tip opening is not sucked into the container due to the restoring force of the container, and although there is certainly an advantage in dripping the necessary amount, in terms of preventing liquid dripping Further improvements were desired. The liquid dripping not only stains the outer surface of the nozzle, but also causes a problem that when the nozzle is covered with a cap, it flows between the nozzle and the cap and hardens to make it difficult to separate them. In particular, further improvement has been desired in the point that liquid sagging is likely to occur when used at an angle rather than perpendicularly to the coated surface.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a one-push squeeze type liquid container in which liquid dripping can be prevented more reliably by devising a nozzle. When the required amount of liquid in the liquid storage chamber is dropped from the end face of the nozzle tip opening by pressurization and the pressure in the liquid storage chamber is released, the liquid adhering to the nozzle tip opening is sucked into the container by the restoring force of the container. A first structure is a container, wherein the nozzle structure in a one-push squeeze type liquid container in which a liquid holding space is formed in the nozzle tip opening is defined as the first gist, and the liquid in the liquid storage chamber is opened by pressurizing the liquid storage chamber A liquid container for sucking the liquid adhering to the nozzle tip opening into the container by the restoring force of the container when the required amount of liquid is dropped and the pressure in the liquid storage chamber is released. The second gist is the nozzle structure in the one-push squeeze liquid container in which the outer shape of the tip opening is formed into a square shape with rounded corners, and the second gist is that the liquid in the liquid storage chamber is pressurized by pressurizing the liquid storage chamber. When a required amount of liquid is dropped from the opening and the pressure in the liquid storage chamber is released, the liquid adhering to the nozzle tip opening is sucked into the container by the restoring force of the container. The needle body is used to seal the
Nozzle structure in a one-push squeeze type liquid container in which the needle body has an irregular cross-section and a liquid retaining space is formed in the seal part after opening. According to any one of the first to third aspects, there is provided a one-push squeeze-type liquid container in which a communicating irregular cross-sectional space is formed in the nozzle portion by a plurality of projections and depressions substantially in the longitudinal direction and over the entire length. A fourth aspect of the present invention is the nozzle structure, and in any one of the first to third aspects, a fine rod having a non-circular cross section is arranged in the nozzle portion, and at least the tip portion communicates with the fine rod and the inner surface of the nozzle. A fifth aspect of the present invention is a nozzle structure in a one-push squeeze liquid container in which a modified cross-section space is formed and a fine rod can be fixed to the inner surface of the nozzle behind the space. It is intended.

[0007]

The reason why the liquid sag can be reduced is not clear, but it is considered as follows. When the pressurization of the liquid storage chamber is released, most of the liquid attached to the nozzle tip opening due to the restoring force of the container is sucked into the container, but the degree of pressurization, the usage angle of the container with respect to the application surface, and the like. The amount of remaining liquid that adheres to the nozzle tip opening without being sucked into the container changes depending on the amount of remaining liquid in the container and the external environment, etc., and if this amount of remaining liquid is large, liquid dripping may occur. However, in the present invention, since the liquid retaining space is formed in the nozzle tip opening portion, or the liquid retaining space is formed in the seal portion when the seal portion of the nozzle tip portion is opened, The residual liquid that is not sucked into the container and adheres to the nozzle tip opening can be retained, and in the present invention, the outer surface shape of the nozzle tip opening is formed into a square shape with rounded corners. Therefore, the residual liquid adhering to the nozzle tip opening is concentrated at one point. Can diffuse without a, it is believed to be able to reduce dripping.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings.
In the following examples, an example in which a cyanoacrylate-based adhesive is used as the liquid will be described. However, as the liquid, eye drops, cosmetic liquids and the like can also be applied.
1 and 2 show a first embodiment of the present invention. Reference 1
Is a container which is made of polyethylene, polypropylene, polyethylene terephthalate, nylon or the like and has a liquid storage chamber 2 for storing a cyanoacrylate adhesive therein, at least a part of which is made of a synthetic resin having elastic restoring force. The body, which is the upper part of the container body 1 (leftward in the figure)
Is provided with a neck portion 4 having a screw portion 3 on the outer circumference.
As a means for pressurizing the liquid storage chamber 2, as described above, the container main body 1 has an elastic restoring force, and a knock member is provided on the rear portion or the side surface of the container main body 1 and the knock member is knocked. By doing so, various known means such as pressurizing the liquid storage chamber 2 to discharge the liquid can be adopted, and the container body 1 is housed in an outer container at least a part of which has an elastic restoring force. However, it may be a so-called double container. Reference numeral 5 has a screw portion 6 which is screwed into the screw portion 3 of the container body 1 on the inner surface of the rear portion, and has an opening portion 7 (in the drawing, the opening portion 7 is closed (sealing) in the drawing). ) Is shown (before use), but it is opened by a needle body (not shown) that is fixed to the inner surface of the top of the cap at the beginning of use or is a body separate from the cap. This is because the cyanoacrylate adhesive solidifies when it absorbs moisture in the air and becomes unusable, so it is necessary to keep the opening 7 sealed until the user starts using the adhesive for the first time. The nozzle is made of synthetic resin or metal, and the inner hole of the nozzle 5 is formed so as to be gradually narrowed toward the front so that the inner cross-sectional area becomes smaller.

The above construction is basically the same as the prior art. The feature of the present invention lies in the structure of the tip portion of the nozzle 5. That is, four slits 8 are provided at the tip of the nozzle 5, and the slits 8 form the liquid holding space, but the number of slits 8 may be set appropriately. The slit 8 serves as a passageway for returning the liquid into the container when the pressure is released from the liquid storage portion even if excess liquid wraps around from the nozzle opening to the outer surface of the nozzle at the time of extracting the liquid, thereby preventing the liquid from dripping. Has the effect of further increasing the Although the tip of the nozzle 5 is in the state of being flared in the shape of a trumpet, it may be in a straight shape. However, it is more preferable to spread it in a trumpet shape because it is difficult for the residual liquid to flow from the nozzle opening to the outer surface of the nozzle.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, four grooves 9 are provided on the outer circumference of the tip portion of the nozzle 5, and these grooves 9 serve as a liquid holding space. However, the number of the grooves 9 may be set appropriately.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, an annular necked portion 10 is provided on the outer periphery of the tip portion of the nozzle 5, and a trumpet shape is formed in front of the necked portion 10. The expanded portion 11 is formed, and the narrowed portion 10 and the trumpet-shaped expanded portion 11 serve as a liquid holding space.

The above example is an example in which the liquid holding space is formed at the tip opening of the nozzle 5, but various means other than the above may be used as the means for forming the liquid holding space. For example, a groove reaching the opening end may be formed on the inner surface of the tip opening of the nozzle 5, or an annular or lattice-like groove may be formed at the tip opening end of the nozzle 5.

FIG. 5 shows a fourth embodiment of the present invention. In this embodiment, the outer surface shape of the tip opening of the nozzle 5 is formed into a square shape with rounded corners. In the figure,
Although the quadrangle is shown as a quadrangle, it may be appropriately selected from a pentagon, a hexagon, an octagon and the like. In the present example in which the outer surface of the tip opening of the nozzle 5 is formed in a square shape with rounded corners, the critical interface tension becomes larger than that of the tip opening of a general nozzle having a circular outer shape, and the nozzle 5 It shows a phenomenon that the residual liquid adhering to the tip of the is diffused, it is possible to prevent the residual liquid from concentrating and adhering to one point as much as possible, and it is possible to prevent the dripping as much as possible.

FIG. 6 shows a fifth embodiment of the present invention. That is, in general, the tip of the nozzle 5 is sealed before the start of use, and the seal is opened by the needle at the start of use.
The cross section of No. 2 is formed into an irregular shape (a star shape in the figure), and the seal portion is opened by the needle body 12 to form the opening portion 7, whereby the shape of the opening portion 7 is changed to that of the needle body 12. Although not the same, the cross-sectional shape can be made close to that, and this is a liquid holding space. In addition, needle body 1
The sectional shape of 2 may be, for example, the shape shown in FIG. 7, or may be a triangle, a quadrangle, or the like.

FIGS. 8 to 16 show an embodiment capable of simultaneously satisfying the prevention of liquid dripping and the prevention of the generation of bubbles in the liquid at the time of discharge, which is a problem in this type of container in addition to the liquid dripping. Although the shape of the nozzle tip opening and the shape of the opening 7 are not shown, they are implemented in combination with the above embodiment. The same parts as those in FIG. 1 are designated by the same reference numerals.

FIGS. 8 to 16 show an embodiment in which a plurality of projections and recesses are formed in the nozzle portion so as to communicate with each other in the longitudinal direction along the entire length, and a thin rod having a non-circular cross section is arranged in the nozzle portion. , An embodiment in which at least the tip portion forms a communication cross-section space between the rod and the inner surface of the nozzle, and the rod can be fixed on the inner surface of the nozzle behind the space.

More specifically, referring to FIG. 8, a plurality of protrusions 13 and recesses 14 are formed on the inner surface of the hole of the nozzle 5 substantially in the longitudinal direction and over the entire length.
A modified cross-section space 15 is formed which is communicated with 3 and the recess 14 (see FIGS. 9 and 10). The broken line in FIG. 9 indicates an inscribed circle formed by the protrusions 13, and this inscribed circle functions as a capillary. The capillary diameter is the type of liquid used, the surface tension, and the like. It may be appropriately determined depending on the viscosity. For example, when the liquid is a cyanoacrylate adhesive and the surface tension is 25 to 45 dyne / cm and the viscosity is 1 to 1000 cps, 0.7 mm or less is preferable. Further, although the modified cross-section space 15 is formed by the projection 13 and the recess 14 which are integrally formed with the inner surface of the nozzle 5 in the drawing, the modified cross-sectional space 15 may be formed separately from the inner surface of the nozzle 5 or may be modified. The shape of the cross-sectional space 15 is shown as a relatively simple shape in the drawing, but grooves are formed on the surfaces of the protrusions 13 and the depressions 14, the protrusions are formed in a curved shape, and the innermost portion (axis It can also be made into a complicated shape such as branching the (heart). Furthermore, the protrusion 13
The inner wall of the irregular cross-section space 15 formed by the recess 14 may be subjected to mechanical treatment such as roughening by cutting, physical treatment, chemical treatment, or the like.

Further, in FIGS. 11 and 12, the nozzle 5
A narrow rod 16 having a non-circular cross section is arranged inside the portion, and a deformed cross-sectional space 17 communicating between the rod 16 and the inner surface of the nozzle 5 is formed at the tip portion. This irregular cross section space 1
7 may be formed not only at the tip portion of the nozzle 5 but also extending rearward, but the fine rod 16 at the rear of the irregular cross-section space 17 is fixed by being press-fitted into the inner surface of the nozzle 5. As the material of the rod 16, synthetic resin or metal can be used, but synthetic resin is preferable in consideration of easiness of processing, and the fixing means of the rod 16 is not only press-fitting but also bonding or the like. Appropriate means can be adopted.

The sectional shape of the fine rod 16 is shown in FIGS.
In the above, in the nozzle 5, the cross-sectional shape in the tip portion of the nozzle 5 is substantially rectangular, and the shape of the rear portion of the nozzle 5 is a combination of five rods having a circular cross-section. However, as shown in FIG. 13 and FIG. The nozzle 5 has a triangular cross-sectional shape in the tip portion and a shape in which its corner is cut, and the rear portion thereof has substantially the same shape.
As shown in FIG. 6, the cross-sectional shape in the tip portion of the nozzle 5 is the same as that in FIG. 13, and the shape of the rear portion thereof may be a shape in which two large and small rods are combined and integrated. Further, as the fine rod 16, the inner cross-sectional shape of the tip of the nozzle 5 can be formed into various shapes such as petal type and star shape, and the fine rod 16 in the front end of the nozzle 5 and the fine rod behind it can be formed. It may be configured by a separate member, and the surface of the rod 16 and / or the nozzle 5 may be mechanically or physically treated in the same manner as described in the above embodiment.
You may give a chemical treatment.

[0020]

According to the present invention, when the required amount of liquid in the liquid storage chamber is dropped from the nozzle tip opening by pressurizing the liquid storage chamber and the pressure in the liquid storage chamber is released, the nozzle tip opening is performed by the restoring force of the container. A liquid container for sucking the liquid adhering to the inside of the container, wherein a liquid holding space is formed in the nozzle tip opening portion, or the outer surface shape of the nozzle tip opening portion is formed in a square shape with rounded corners. Nozzle structure in one-push squeeze type liquid container. Alternatively, by pressurizing the liquid storage chamber, the required amount of liquid in the liquid storage chamber is dropped from the nozzle tip opening, and when the pressure in the liquid storage chamber is released, the liquid adhering to the nozzle tip opening is put into the container by the restoring force of the container. It sucks, and the tip of the nozzle is sealed before the start of use.
Is a liquid container which is opened and whose opening is opened by a needle at the start of use. The needle has a modified cross-section and forms a liquid holding space in the seal after opening. Since it is a nozzle structure in such a one-push squeeze type liquid container, it is possible to retain the remaining liquid that is not sucked into the container and adheres to the nozzle tip opening, or diffuse it without concentrating it at one point. The amount of sagging can be reduced as much as possible. Further, in the above configuration, in the nozzle portion, a configuration in which a communication irregular cross-sectional space is formed by a plurality of protrusions and depressions in the substantially longitudinal direction and over the entire length, or in the nozzle portion, a rod having a non-circular cross section is arranged, In a structure in which at least the distal end portion has a communication irregular cross-section space formed between the rod and the inner surface of the nozzle, and the rod can be fixed on the inner surface of the nozzle behind the space, in addition to the effect of preventing liquid dripping, When the liquid is drawn out from the nozzle tip opening, the air corresponding to the discharged liquid is replaced in the container body by the communication irregular cross-section space, so that the generation of bubbles in the discharged liquid is prevented as much as possible. It also has the additional effect of being able to

[Brief description of the drawings]

FIG. 1 is a partial vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a nozzle.

FIG. 3 is a perspective view of a main part of another embodiment of the nozzle.

FIG. 4 is a perspective view of a main part of still another embodiment of the nozzle.

FIG. 5 is a perspective view of a main part of still another embodiment of the nozzle.

FIG. 6 is a perspective view of a main part of an embodiment of a nozzle and a needle body.

FIG. 7 is a cross-sectional view of another embodiment of the needle body corresponding to FIG.

FIG. 8 is a partial vertical sectional view showing another embodiment of the present invention.

9 is an enlarged end view taken along line AA of FIG.

10 is an enlarged end view taken along line BB of FIG.

FIG. 11 is a view corresponding to FIG. 9 showing another embodiment of the present invention.

FIG. 12 is a view corresponding to FIG. 10 showing another embodiment of the present invention.

FIG. 13 is a view corresponding to FIG. 9 showing another embodiment of the present invention.

FIG. 14 is a view corresponding to FIG. 10 showing another embodiment of the present invention.

FIG. 15 is a view corresponding to FIG. 9 showing another embodiment of the present invention.

FIG. 16 is a view corresponding to FIG. 10 showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Liquid storage chamber 3 Screw part 4 Neck part 5 Nozzle 6 Screw part 7 Opening part 8 Slit 9 Groove 10 Constriction part 11 Expanding part 12 Needle body 13 Protrusion 14 Depression 15 Variant cross section space 16 Fine rod 17 Cross section space

Claims (5)

[Claims] 1. A liquid adhering to the nozzle tip opening due to the restoring force of the container when the required amount of liquid in the liquid containing chamber is dropped from the nozzle tip opening by pressurizing the liquid containing chamber and the pressure in the liquid storage chamber is released. A nozzle structure in a one-push squeeze type liquid container in which a liquid retaining space is formed in the nozzle tip opening. 2. A liquid adhering to the nozzle tip opening by the restoring force of the container when the required amount of the liquid in the liquid containing compartment is dropped from the nozzle tip opening by pressurizing the liquid containing compartment and the pressure in the liquid storage chamber is released. A nozzle structure in a one-push squeeze liquid container in which the outer surface shape of the nozzle tip opening is formed into a square shape with rounded corners. 3. A liquid adhering to the nozzle tip opening by the restoring force of the container when the required amount of the liquid in the liquid containing compartment is dropped from the nozzle tip opening by pressurizing the liquid containing compartment and the pressure in the liquid storage chamber is released. Is a liquid container in which the tip of the nozzle is sealed before the start of use, and the seal is opened by the needle at the start of use. Is a nozzle structure in a one-push squeeze type liquid container that has a modified cross section and forms a liquid holding space in the seal portion after opening. 4. The nozzle structure for a one-push squeeze liquid container according to claim 1, wherein a communicating irregular cross-section space is formed in the nozzle portion by a plurality of protrusions and depressions in a substantially longitudinal direction and over the entire length. . 5. A rod having a non-circular cross-section is arranged in the nozzle portion, a communication irregular cross-section space is formed between the rod and the inner surface of the nozzle at least at a tip portion, and a rear cross-sectional space is formed on the inner surface of the nozzle. The nozzle structure in a one-push squeeze liquid container according to any one of claims 1 to 3, wherein the fine rod can be fixed.