JP2009227329A - Internal plug for liquid dropping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal plug for liquid dropping which is fitted on the opening section of a container being deformable by pressing and having elastic restorability, and by which a liquid can be dropped by a predetermined amount, and liquid dripping is hard to occur. <P>SOLUTION: This internal plug for liquid dropping is fitted in the opening section of the container C which is deformable by pressing, and has elastic restorability. The internal plug for liquid dropping is constituted of a liquid reservoir section 1, a drawn section 2, and a shoulder section 3. In this case, the inner diameter of the liquid reservoir section 1 is expanded toward the distal end side, or has the same diameter. The diameter of the drawn section 2 is smaller than the diameter of the rear end side of the liquid reservoir section 1, and also, the drawn section 2 does not have the diameter being larger than the diameter on the liquid reservoir section 1 side. The shoulder section 3 has an internal surface 3a of a conical shape for which the inner diameter gradually becomes larger from the drawn section 2, or a rotor shape of which the vertical cross section has a curved line protruding outward. A plurality of groove sections 4 of the same shape are radially formed from the drawn section 2 to the rear end of the shoulder section 3 on the internal surface 3a of the shoulder section 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid dropping inner stopper that is deformable by pressing and is attached to an opening of a container having elastic resilience, and is capable of dripping a predetermined amount of liquid and is difficult to cause dripping. About.

  In a container that is used by dripping a predetermined amount of the stored liquid, such as a container that stores liquids such as eye drops and cosmetics, a small-diameter restrictor (regulatory passage) is provided in the middle of the nozzle from which the liquid is dispensed. ) Is often used to form a liquid reservoir (liquid reservoir) on the tip side of the nozzle (see, for example, Patent Document 1). In this way, by providing a small-diameter throttle part in the middle of the nozzle, it is possible to prevent a large amount of liquid from being poured out at once, and by providing a liquid reservoir part at the tip side of the small-diameter throttle part, When the liquid is dropped upside down, the liquid does not drop unexpectedly. However, in such a container, due to the small-diameter throttle portion formed in the middle of the nozzle, the liquid drawing after use is bad, and when the container that was used upside down is returned to its original position, the problem of dripping is likely to occur. There is.

  As a container devised to prevent dripping, there is a liquid container in which a ring-shaped flange body protrudes outward from the outer peripheral edge of the tip of the nozzle (see, for example, Patent Document 2). In this liquid container, the ring-shaped flange body projecting from the outer peripheral edge of the tip of the nozzle has a good drainage, and as a result, it is difficult for dripping. However, when the stored liquid is a liquid having a relatively high viscosity, the liquid may adhere to the flange body protruding outward and the dripping may be further deteriorated.

  In addition, there is a liquid container devised to prevent dripping by increasing the adsorbability between the liquid and the inner surface of the nozzle by providing grooves on the entire inner wall of the subsequent portion from the nozzle spout (for example, , See Patent Document 3). If the groove is provided in this way to increase the surface area of the inner surface of the nozzle, the surface tension of the liquid increases, and the liquid is strongly adsorbed in the nozzle, thereby preventing dripping. However, the amount of liquid dispensed at a time cannot be controlled because there is no small-diameter restrictor in the middle of the nozzle.

Japanese Utility Model Publication No. 62-182247 Japanese Utility Model Publication No. 3-23065 Japanese Patent Application Laid-Open No. 10-2111950

  In view of the above-described problems, the present invention is a liquid dropping inner stopper that is attached to an opening of a container that is deformable by pressing and has elastic resilience, and can drop a predetermined amount of liquid and does not easily cause dripping. It is an object to provide an inner stopper for dropping liquid.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has expanded the inner diameter of the liquid dropping inner stopper attached to the opening of the container that is deformable by pressing and has elastic resilience toward the tip side. Or a reservoir having the same diameter, a throttle having a diameter smaller than the diameter of the rear end of the reservoir and not having a diameter larger than the diameter of the reservoir, and an inner diameter sequentially increasing from the throttle. If the conical shape or the longitudinal section is formed of a shoulder portion having an inner surface with a curved rotating body having a convex curve outward, the conical shape or longitudinal section in which the inner diameter of the shoulder portion gradually increases from the throttle portion to the outside Since the inner surface of the shoulder part is wider than the throttle part, the residual liquid in the liquid reservoir part has resistance when returning to the container through the throttle part. Smaller, better liquid drainage, and the inner surface of the shoulder from the throttle to the rear end of the shoulder If multiple grooves with the same shape are formed radially, liquid adheres to the inner surface of the shoulder due to the influence of the groove when the container is upright after use, and this liquid continues to the residual liquid in the liquid reservoir. The present invention was completed by investigating that the remaining liquid in the liquid reservoir was quickly sucked into the throttle by flowing down along the inner surface of the shoulder in a wet state, making it difficult for dripping to occur. is there.

  That is, the present invention relates to a liquid dropping inner stopper that is attached to an opening of a container that is deformable by pressing and has elastic resilience, the inner diameter of which is expanded toward the tip side or a liquid reservoir having the same diameter. And a constricted portion having a diameter smaller than the diameter of the rear end side of the liquid reservoir and not having a diameter larger than the diameter of the liquid reservoir, and a conical shape or a longitudinal section in which the inner diameter sequentially increases from the constricted portion. And a shoulder having an inner surface with a rotating body with a convex curve are sequentially provided from the tip side toward the opening of the container, and radially on the inner surface of the shoulder from the throttle to the rear end of the shoulder. An internal stopper for dropping liquid, wherein a plurality of grooves having the same shape are formed.

  Further, in the liquid dripping inner plug according to the present invention, if the width of each groove formed on the inner surface of the shoulder portion is made smaller than the diameter of the rear end of the throttle portion, the liquid in the throttle portion having a small diameter and each groove portion are generated. Since the edge with the liquid remaining due to the surface tension is not cut off, the liquid in the liquid reservoir does not stay at the throttle part, and the liquid drawing is preferably improved, and the inner surface of the shoulder part with respect to the height of the inner surface of the shoulder part If the ratio of the radius of the rear end is 0.6 to 3.7, the inclination of the inner surface of the shoulder portion is gentle and it takes time for liquid drawing, or the inclination of the inner surface of the shoulder portion is steep and the inner surface of the shoulder portion It has also been found that the adhering liquid does not flow suddenly and the edge of the residual liquid in the liquid reservoir is not cut off, and the residual liquid can be smoothly returned into the container.

  An inner stopper for dropping liquid according to the present invention is an inner stopper for dropping liquid that is attached to an opening of an elastically recoverable container that is deformable by pressing, and whether the inner diameter is expanded toward the tip side. Alternatively, a liquid reservoir portion having the same diameter, a throttle portion having a diameter smaller than the diameter of the rear end side of the liquid reservoir portion and not having a diameter larger than the diameter of the liquid reservoir portion, and a cone in which the inner diameter sequentially increases from the throttle portion. Since the shape or longitudinal section is composed of a shoulder having an inner surface of a rotating body with a convex curve on the outside, the inner surface of the shoulder has a conical shape or longitudinal section with the inner diameter sequentially increasing from the throttle portion. It has a convex curvilinear shape, and has a shape that is wider than the throttle, so the residual liquid in the liquid reservoir is low in resistance and good in liquid drawing when returning to the container through the throttle. In addition, a groove of the same shape radially on the inner surface of the shoulder from the throttle to the rear end of the shoulder Since the liquid is formed in plural, liquid adheres to the inner groove of the shoulder due to the influence of the groove when the container is erected after use, and the shoulder remains in a state where this liquid is continuous with the remaining liquid in the liquid reservoir. By flowing down along the inner surface of the part, the residual liquid in the liquid reservoir part is quickly sucked into the throttle part, and dripping can be prevented.

  Further, in such an inner stopper for dropping liquid according to the present invention, when the width of each groove formed on the inner surface of the shoulder is smaller than the diameter of the rear end of the throttle portion, when the container is used upright after use The edge between the liquid in the narrowed portion and the liquid remaining in each groove due to surface tension does not break, so that the liquid in the liquid reservoir does not stay at the throttle and the liquid drawing is improved. When the ratio of the radius of the rear end of the inner surface of the shoulder with respect to the height is 0.6 to 3.7, it is preferable because the residual liquid can be returned smoothly into the container. When the ratio of the radius of the rear end of the shoulder inner surface to the height of the inner surface of the shoulder is less than 0.6, the inclination of the inner surface of the shoulder is steep and the liquid in the liquid reservoir is stagnated at the throttle. During this time, the liquid adhering to the inner surface of the shoulder is quickly drawn into the container, so that the edge between the residual liquid in the liquid reservoir and the liquid adhering to the inner surface of the shoulder easily breaks. If the ratio of the radius of the rear end of the shoulder surface to the height of the inner surface of the shoulder portion exceeds 3.7, the inclination of the inner surface of the shoulder portion may be reduced. The liquid that is loose and adheres to the inner surface of the shoulder portion is difficult to be drawn into the container through the inner surface of the shoulder portion, and it takes time for the liquid in the liquid reservoir to return to the inside of the container and is difficult to handle.

Hereinafter, the liquid dropping inner plug according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing an embodiment of a liquid dropping inner plug according to the present invention, FIG. 2 is a bottom view of the liquid dropping inner plug of FIG. 1, and FIG. 3 is a sectional view taken along line AA in FIG. 4 is a sectional view taken along line BB in FIG. 2, FIG. 5 is a front view showing another embodiment of the liquid dropping inner plug according to the present invention, and FIG. 6 is a bottom view of the liquid dropping inner plug of FIG. 7 is a cross-sectional view taken along the line CC in FIG. 6, FIG. 8 is a front view showing still another embodiment of the liquid dropping inner plug according to the present invention, FIG. 9 is a bottom view of the liquid dropping inner plug of FIG. 10 is a cross-sectional view taken along the line DD in FIG. 9, and FIG. 11 is an explanatory cross-sectional view showing a state in which the liquid dropping inner plug of FIG. 1 is attached to the opening of the container.

  In the drawing, C is a container that can be deformed by pressing and has elastic resilience, and an inner stopper for dropping liquid according to the present invention is attached to the opening thereof. The container C can be easily deformed by pressing with a human hand or finger and can be elastically restored after use, and the material is not particularly limited as long as it does not react with the liquid stored in the container C.

  Reference numeral 1 denotes a liquid reservoir portion whose inner diameter is increased toward the tip side or has the same diameter. The liquid reservoir 1 is formed in a nozzle-like portion located on the distal end side of the liquid dropping inner stopper according to the present invention, and the liquid stored in the container C drops from the liquid reservoir 1 by a predetermined amount. Is done. In addition, since the liquid dropping inner stopper according to the present invention is for dropping the liquid stored in the container C, the liquid reservoir 1 is sized to store, for example, about 1 to several drops of liquid. It is.

  Reference numeral 2 denotes a throttle portion having a diameter smaller than the diameter on the rear end side of the liquid reservoir 1 and not having a diameter larger than the diameter on the liquid reservoir 1 side. The throttle portion 2 is formed on the rear end side of the liquid reservoir portion 1, and the diameter of the throttle portion 2 is smaller than the diameter of the rear end side of the liquid reservoir portion 1 and is the same diameter or located on the liquid reservoir portion 1 side. It is formed to have the largest diameter, and serves to prevent a large amount of liquid from flowing toward the liquid reservoir 1 at a time.

Reference numeral 3 denotes a shoulder portion having an inner surface 3a having a conical shape whose inner diameter is gradually increased from the narrowed portion 2 or a rotating body shape having a longitudinal section convex outward. The inner surface 3a of the shoulder portion 3 has a conical shape in which the inner diameter sequentially increases from the narrowed portion 2 or a rotating body shape with a curved longitudinally convex outer section, and therefore has a shape that is wider than the narrowed portion 2. When the residual liquid in the liquid reservoir 1 returns to the container C through the throttle part 2, the resistance is small and the liquid drawing is good.
Further, if the ratio of the radius of the rear end of the inner surface 3a of the shoulder 3 to the height of the inner surface 3a of the shoulder 3 is 0.6 to 3.7, the residual liquid can be smoothly returned into the container C. It is preferable. The ratio is 0.6 when the angle between the axis from the apex of the cone toward the center of the bottom surface and the generatrix on the side of the cone is about 30 °, and 3.7 when the angle is about 75 °.

  Reference numeral 4 denotes a groove portion having the same shape formed radially on the inner surface 3a of the shoulder portion 3 from the throttle portion 2 toward the rear end of the shoulder portion 3. If the width of the groove portion 4 is smaller than the diameter of the throttle portion 2, the edge between the liquid in the throttle portion 2 having a small diameter and the liquid remaining in each groove portion 4 due to surface tension when the container C is used upright after use. Therefore, it is preferable that the liquid in the liquid reservoir 1 does not stay at the throttle 2 and the liquid drawing is improved.

  The liquid dropping inner plug according to the present invention is characterized in that a groove portion 4 is formed on the inner surface 3a of the shoulder portion 3, and the groove portion 4 has a width so that a contact surface per unit volume of the liquid becomes large. It is preferable that a large number is formed on the inner surface 3a of the shoulder portion 3 evenly. For example, in each of the embodiments (FIGS. 2, 6, and 9), six groove portions 4 having the same shape narrower than the diameter of the narrowed portion 2 are formed radially from the narrowed portion 2 at equal intervals.

  By forming the groove 4 radially from the throttle 2, the groove 4 becomes dense in the vicinity of the throttle 2, and as a result, a particularly large surface tension acts on the liquid in the vicinity of the throttle 2, and the liquid reservoir The residual liquid in 1 can be strongly drawn into the container C.

Further, when the residual liquid returns from the liquid reservoir 1 through the throttle part 2 and into the container C, the throttle part 2 having a small diameter becomes a large resistance and the return of the residual liquid is not good. Therefore, although not illustrated, for example, when the shape of the inner surface 3a of the shoulder portion 3 is a rotating body shape having a concave curved outer surface in the longitudinal section, the inner surface 3a of the shoulder portion 3 following the throttle portion 2 is It becomes narrow and has a larger resistance, and the liquid drawing is further deteriorated, which causes dripping.
Therefore, in the liquid dropping inner plug according to the present invention, the inner surface 3a of the shoulder portion 3 has an inner diameter from the throttle portion 2 as shown in FIGS. 3, 4 and 7 which are cross-sectional views of the embodiments of FIGS. As shown in FIG. 9, which is a sectional view of the embodiment of FIG. In this state, the residual liquid in the liquid reservoir 1 is drawn better.

  In addition, since the liquid dropping inner stopper according to the present invention is attached to the opening of the container C, for example, the liquid dropping inner stopper of the embodiment shown in FIGS. As shown in FIG. 11 attached to the opening of the container C, a mounting part to be engaged with the outer surface of the opening of the container C is formed, or as shown in FIGS. A mounting portion to be screwed into the inner surface of the container C may be formed, or a mounting portion to be pressure-bonded to the inner surface of the opening portion of the container C may be formed as shown in FIGS.

  In addition, since the liquid reservoir 1 is difficult to drop when narrowed toward the distal end side, the diameter of the liquid reservoir portion 1 is increased toward the distal end side, for example, as shown in FIGS. And the same diameter as shown in FIGS. 8 to 10.

Next, in the embodiment shown in FIGS. 1 to 4, is about 1.7, and the angle between the axis from the apex of the cone to the center of the bottom and the generatrix on the side of the cone is about 60 ° for comparison. The slope is wide and wide. 5 to 7, the ratio of the radius of the rear end of the inner surface 3a of the shoulder 3 to the height of the inner surface 3a of the shoulder 3 is about 1, and it goes from the apex of the cone to the center of the bottom surface. The angle between the axis and the inclined surface of the cone is about 45 °.
Thus, if the ratio of the radius of the rear end of the inner surface 3a of the shoulder 3 to the height of the inner surface 3a of the shoulder 3 is 0.6 to 3.7, the inclination of the inner surface 3a of the shoulder 3 is gentle. It may take time for the liquid to drain, or the slope of the inner surface 3a of the shoulder 3 may be steep, and the liquid adhering to the inner surface 3a of the shoulder 3 may flow suddenly and the edge of the liquid remaining in the liquid reservoir 1 may be cut off. It is preferable that the residual liquid can be smoothly returned into the container C. In the embodiment shown in FIGS. 8 to 10, the ratio of the radius of the rear end of the inner surface 3a of the shoulder 3 to the height of the inner surface 3a of the shoulder 3 is about the same as in the embodiment shown in FIGS. Although this ratio is 1.7, this ratio is the average inclination of the inner surface 3a of the shoulder portion 3. Therefore, even when the inner surface 3a of the shoulder portion 3 has a curved rotating body with a longitudinal section protruding outward, this ratio also depends on this ratio. As with the other embodiments, the ease of liquid flow can be determined.

It is a front view which shows one Example of the inner stopper for liquid dropping which concerns on this invention. It is a bottom view of the inside stopper for liquid dropping of FIG. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a front view which shows the other Example of the inside stopper for liquid dropping which concerns on this invention. FIG. 6 is a bottom view of the liquid dropping inner plug of FIG. 5. It is CC sectional view taken on the line in FIG. It is a front view which shows the further another Example of the inner stopper for liquid dropping which concerns on this invention. FIG. 9 is a bottom view of the liquid dropping inner plug of FIG. 8. It is the DD sectional view taken on the line in FIG. FIG. 2 is an explanatory cross-sectional view showing a state in which the liquid dropping inner stopper of FIG. 1 is attached to the opening of the container.

Explanation of symbols

1 Liquid reservoir 2 Constriction 3 Shoulder
3a Inner surface 4 Groove C Container

Claims (3)

An inner stopper for dropping liquid that is attached to the opening of the container (C) that can be deformed by pressing and has elastic resilience,
The inner diameter of the liquid reservoir portion (1) is expanded toward the front end side, or the diameter is smaller than the diameter of the rear end side of the liquid reservoir portion (1) and the liquid reservoir portion (1). A constricted portion (2) having no diameter larger than the diameter on the side, and a conical shape or an inner surface (3a) having a conical shape whose inside diameter sequentially increases from the constricted portion (2) or a curved body whose longitudinal section is convex outward. The shoulder portion (3) is sequentially provided from the distal end side toward the opening of the container (C), and the shoulder portion (2) is connected to the shoulder portion (3) on the inner surface (3a) of the shoulder portion (3). 3) An inner plug for dropping liquid, wherein a plurality of grooves (4) having the same shape are formed radially toward the rear end.   The inner stopper for dropping liquid according to claim 1, wherein the width of each groove portion (4) formed in the inner surface (3a) of the shoulder portion (3) is smaller than the diameter of the rear end of the throttle portion (2).   The liquid according to claim 1 or 2, wherein the ratio of the radius of the rear end of the inner surface (3a) of the shoulder portion (3) to the height of the inner surface (3a) of the shoulder portion (3) is 0.6 to 3.7. Internal stopper for dripping.

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