WO2007094243A1

WO2007094243A1 - Container

Info

Publication number: WO2007094243A1
Application number: PCT/JP2007/052282
Authority: WO
Inventors: Hisashi Miyata; Tadashi Otsuka
Original assignee: Senju Pharmaceutical Co., Ltd.; Hanshin Kasei Co., Ltd.
Priority date: 2006-02-13
Filing date: 2007-02-08
Publication date: 2007-08-23
Also published as: JPWO2007094243A1

Abstract

A container comprising a container body (1) having a hollow, tubular trunk (13) and a bottom (12) continuing from the trunk (13), and formed of thermoplastic resin, wherein a hollow pressing portion (15), that consists of a dent (14)-constituting wall surface (14a), the bottom (12) continuing form the wall surface (14a) and the trunk (13) continuing from the bottom (12) and has a portion having its section area gradually increased upward, is formed by forming the dent (14) by recessing the bottom (12) toward inner side and upward direction of the trunk (13), and, when two locations on the trunk (13b) of the pressing portion (15) are held by finger tips and the trunk (13b) is pressed inward, a hollow space in the pressing portion (15) is narrowed, and the hollow space in the pressing portion (15) is elastically deformed so as to return to a state before the pressing when the pressing is released.

Description

Technical field

[0001] The present invention relates to a container including a container body formed of a thermoplastic resin, which is used for dropping a liquid such as a chemical liquid or a cosmetic liquid.

Background art

[0002] Among these types of containers, for example, as a chemical liquid container filled with a chemical liquid, the body portion of the container body is formed into a hollow cylindrical shape, and the body portion is pressed by pushing the body portion inward. The one in which the internal volume is reduced and the internal chemical solution is dropped is widely used. The container body is appropriately set to a predetermined thickness according to the material of the container body, the amount of the chemical solution to be filled, and the like in order to prevent the permeation of moisture contained in the chemical solution.

[0003] However, with the above-described conventional chemical solution container, there are cases where the trunk portion is too hard for an elderly person or a child with a weak pressing force to easily press the inside.

[0004] Therefore, it is easy to dripping a chemical solution even with a weak pressing force. (Hereinafter, in this specification, it is easy to dripping a chemical solution with a weak pressing force. For this purpose, an eye drop container has been proposed in which a flat holding surface is formed in each of two locations in the circumferential direction of a hollow cylindrical body (see Patent Document 1). .

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-120638

[0006] If the eye drop container described in Patent Document 1 is used, it is easier to drop the eye drop with a weaker pressing force than the conventional container, but this is not sufficient for squeeze and the use is not possible. Further improvements including selfishness are desired.

Disclosure of the invention

Problems to be solved by the invention

[0007] The present invention has been made in view of the above circumstances, and a main object thereof is to provide a container having excellent squeeze characteristics.

Means for solving the problem

[0008] As a result of intensive studies to solve the above problems, the present inventors have determined that the bottom of the container body is The above-described problem is achieved by forming a hollow portion that is recessed toward the upper inside of the body portion, and forming a hollow pressing portion that has a portion having a cross-sectional area that increases toward the upper portion around the recessed portion. The present invention has been completed.

That is, the gist of the present invention is as follows.

[1] A container having a container body formed of a thermoplastic resin having a hollow cylindrical body and a bottom connected to the body, the bottom being directed upward inside the body. By forming a hollow portion that is depressed, a wall portion that constitutes the hollow portion, a bottom portion that is continuous to the wall surface, and a trunk portion that is continuous to the bottom portion, a portion whose cross-sectional area increases upward is formed. A hollow pressing part is formed, and when the body part of the pressing part is picked with two fingertips and the body part is pressed inward, the interval between the pressing parts becomes narrow and the pressing operation is released. In addition, the container is elastically deformed so that the interval between the pressing portions returns to the state before the pressing operation,

[2] The container according to [1], wherein the recess is formed in a substantially straight line through the center of the bottom in the bottom view and to the vicinity of the peripheral edge.

[3] The container according to [1], wherein the hollow portion is formed in a substantially straight line through the central portion of the bottom portion to the peripheral edge portion in a bottom view,

[4] The container according to [2] or [3], wherein the recess is formed radially from the center of the bottom in a bottom view.

[5] The container according to any one of [1] to [4] above, wherein the wall surface of the recess is formed in a substantially inverted V-shaped longitudinal section.

[6] The container according to [5] above, wherein the depth of the recess is 1Z2 to 1Z3, which is the height of the body, [7] The thickness of the body is 0.3 to 1.5 mm, ] The container according to

[8] The container according to [7], wherein the thermoplastic resin is polyethylene having a resin density of 0.91 to 0.96 gZcm ³ ,

[9] The container according to any one of [1] to [8], which is for eye drops.

The invention's effect

[0010] The container of the present invention includes a container main body formed of a thermoplastic resin having a hollow cylindrical barrel portion and a bottom portion continuous to the barrel portion, and the bottom portion is directed upward inside the barrel portion. Hollow By forming the recessed portion, the wall portion constituting the recessed portion, the bottom portion connected to the wall surface, and the body portion connected to the bottom portion have a portion whose cross-sectional area increases upward. When a hollow pressing part is formed, when two barrel parts of the pressing part are picked with a fingertip and the trunk part is pressed inwardly, the interval between the pressing parts becomes narrow and the pressing operation is released. Since the gap between the pressing portions is elastically deformed so that it returns to the state before the pressing operation, the interval between the pressing portions can be reduced with a weak pressing force, thereby reducing the internal volume of the pressing portion and reducing the inside of the container. Since the liquid can be dripped, a container having excellent squeeze properties can be provided.

Brief Description of Drawings

FIG. 1 is an external perspective view showing a first embodiment of a container according to the present invention.

2 is a front view showing a state where a cap is removed from the container of FIG.

FIG. 3 is a side view showing a state where a cap is removed from the container of FIG. 1.

FIG. 4 is a bottom view of the container of FIG.

FIG. 5 is a longitudinal cross-sectional reference diagram showing a state of the container shown in FIG. 1 when the pressing part is picked and the inner side is pressed.

FIG. 6 is a cross-sectional reference view showing the usage state of the container of FIG.

FIG. 7 is an external perspective view showing a second embodiment of the container of the present invention.

8 is a front view showing a state where the cap is removed from the container of FIG.

FIG. 9 is a bottom view of the container of FIG.

FIG. 10 is a front cross-sectional view showing a third embodiment of the container of the present invention with the cap removed.

FIG. 11 is a bottom view of the container of FIG.

FIG. 12 is a bottom view showing a fourth embodiment of the container of the present invention.

FIG. 13 is a bottom view showing a fifth embodiment of the container of the present invention.

FIG. 14 is a front sectional view showing a sixth embodiment of the container of the present invention with the cap removed.

FIG. 15 is a bottom view of the container of FIG.

FIG. 16 is a diagram showing the relationship between squeeze force and water vapor transmission rate for the product of the present invention and the comparative product. is there.

Explanation of symbols

[0012] A, B, C, D, E, F containers

1 Container body

12 Bottom

13 Torso

13a trunk

14 depression

14a Wall

15 Pressing part

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail with reference to the drawings. 1 to 6 show a first embodiment of a container according to the present invention, which is detachably screwed to a container main body 1 and a male screw 1 la formed on a screw cylinder portion 11 of the container main body 1. The cap 3 is roughly composed.

[0014] The container body 1 is obtained by blow-molding a flexible thermoplastic resin. Inside the container body 1, for example, a chemical solution (eye drops, nasal drops, ear drops, etc.) ), Liquid such as cosmetic emulsion is filled after or at the same time as forming the container body. The container body 1 includes a bottom 12, a hollow cylindrical body 13 that is continuous with the periphery of the bottom 12, a shoulder 13 a of the body 13, and a threaded cylindrical portion having a male thread 11 a formed on the outer peripheral surface. 11 and an open tube portion l ib that is continuous to the upper side of the screw tube portion 11 and has a slightly smaller diameter than the screw tube portion 11, and a liquid injection inner plug 2 is fitted into the open tube portion l ib. Are combined.

[0015] The bottom portion 12 of the container body 1 is directed from the one end of the periphery of the bottom portion 12 through the center of the bottom portion 12 to the other end opposite to the one end of the periphery of the bottom portion 12 toward the inside upper side of the trunk portion 13. A recessed portion 14 is formed. The recess 14 is formed in a substantially straight shape that is wide in a bottom view, and the wall surface 14a that constitutes the recess 14 is formed in a substantially inverted V shape in the longitudinal section. The recess 14 is formed at the same time as the container body 1 is molded. In the following description, a wall surface 14a constituting the hollow portion 14, a bottom portion 12 continuous to the wall surface 14a, and a body portion continuous to the bottom portion 12 The lower part of the container body 1 composed of 13 is particularly called a “pressing part”. Since the pressing portion 15 has a wall surface 14a of the hollow portion 14 as described above formed in a substantially inverted V shape in the longitudinal section, the pressing portion 15 has two hollow shapes on the left and right in the front view, and has a cross-sectional area upward. It is formed to be large.

[0016] The size of the container body 1 is not particularly limited as long as it is appropriately set according to the use of the liquid filled therein. For example, when filling a chemical solution and using it as a chemical solution container, the dimensions may be designed so that the volume can be filled with 1 to 20 mL of the chemical solution. The depth of the indentation 14 is not particularly limited, but is usually sized to 1Z2 to 1Z3, which is the height of the body 13. The thickness of the body part 13 and the pressing part 15 is not particularly limited as long as the thickness and the water vapor permeability of the container body 1 are taken into consideration, but are usually dimensionally designed to be 0.3 to 1.5 mm. .

[0017] The material constituting the container body 1 is not particularly limited as long as it is appropriately selected depending on the use of the liquid to be filled therein. For example, polyethylene, polypropylene, polyethylene terephthalate or the like, which can be blow-molded, is thermoplastic. Mention may be made of rosin. When filled with the above-mentioned chemical solution and used as a chemical solution container, polyethylene is preferred among the above in particular because of its excellent flexibility and low water vapor permeability. ~0. 96GZcm polyethylene force child Mashiku of "0.91 to 0. more preferably polyethylene emissions of 94GZcm ^3.

[0018] The inner plug 2 is obtained by injection-molding a flexible thermoplastic resin, and includes a circular plate portion 21 and the circular plate portion 21 integrally formed with the circular plate portion 21. The outer cylindrical portion 22 that hangs down from the periphery, the inner cylindrical portion 23 that also hangs down the bottom surface force of the circular plate portion 21, and a cylindrical liquid injection portion 24 that protrudes from the upper surface of the circular plate portion 21, In the gap between the outer tube portion 22 and the inner tube portion 23, the open tube portion l ib of the container body 1 is fitted. A liquid injection port 25 is formed at the tip of the liquid injection unit 24, and a liquid passage unit 26 through which the liquid extruded from the container body 1 passes from the liquid injection port 25 to the lower surface of the circular plate unit 21 is formed. Yes. The diameter of the injection port 25 may be set as appropriate according to the properties of the liquid to be extruded, and is not particularly limited, but is usually designed in the range of 1 to 4 mm. Further, the pore diameter of the liquid passing portion 26 may be set as appropriate according to the properties of the liquid to be extruded, and is not particularly limited, but is usually designed in the range of 0.1 to Lmm. The material constituting the inner plug 2 is not particularly limited. Mention may be made of thermoplastic resins which can be injection-molded such as len, polypropylene or polyethylene terephthalate. Further, the inner stopper may be formed integrally with the container body.

The cap 3 is obtained by injection molding of thermoplastic resin, and has a substantially cylindrical body 31, a top plate 32 that closes one end opening of the body 31, and the top plate The upper surface force of 32 consists of a truncated cone-shaped tip tube 33. A female screw (not shown) is formed on the inner peripheral surface of the body portion 31 to be engaged with the male screw 11a formed on the screw cylinder portion 11 of the container body 1. The bottom surface of the top surface 33a of the tip cylinder portion 33 is also formed. At the center, a closing protrusion (not shown) is formed to insert and close the liquid injection port 25 when the cap 3 is attached. The material constituting the cap 3 is not particularly limited, and examples thereof include injection-moldable thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate.

[0020] Next, a method of using the container A described above will be described. In use, with the cap 3 removed from the container body 1 and the inner plug 2 facing downward, the body portion 13b, 13b of the pressing portion 15 is picked with a fingertip, and the body portions 13b, 13b are Press (see arrow in Fig. 5). Then, the interval between the two pressing parts 15 and 15 is slightly narrowed. At this time, the internal volume of each pressing part 15 and 15 is reduced, and the internal liquid is dripped through the liquid passing part 26 and the liquid inlet 25 accordingly. Is done. And when pressing operation is cancelled | released, it elastically deforms so that the space | interval of the said press parts 15 and 15 may return to the state before pressing operation. According to the container A, since the pressing portion 15 is provided, the distance between the two pressing portions 15 and 15 can be narrowed even with a weak pressing force, so that the squeeze property is excellent. In other words, by providing the pressing portion 15 whose cross-sectional area increases upward, the pressing portion 15 is easily deflected even with a weak pressing force, and thus the internal volume of the pressing portion 15 is more easily reduced! /

In the present invention, the squeeze property is quantitatively evaluated using a squeeze force measured using a digital force gauge as an index. The squeeze force is a test body that has a container body filled with 40-60% by volume of phosphate buffer, pH 7.0 (14th revised Japanese Pharmacopoeia) filled with the inner stopper. Is fixed downward in the vertical direction, the measuring tip is horizontally applied to the vicinity of the center of the body of the pressing portion, the tip is moved inward in the radial direction of the body and pressed, and one drop of phosphoric acid is injected from the injection port. The peak value of the pressing force required to drop the buffer solution The smaller the squeeze force, the better the squeeze container. When measuring the squeeze force of a container in which the container main body and the inner stopper are integrally molded, a sample filled with a predetermined amount of phosphate buffer may be used for the measurement.

[0022] The squeeze force of the container of the present invention is usually 3 to 8N, preferably 3 to 7N, and particularly preferably 3 to 6N. The squeeze force is almost halved compared to a conventional container that does not have a depression and a pressing part at the bottom. The squeeze force of the container can be easily controlled by changing the weight of the container body when the type of resin is the same. That is, the squeeze force can be reduced as the weight of the resin in the container body is reduced.

[0023] Further, the container of the present invention is superior in squeeze property as compared with the conventional container, and has the same water vapor barrier property. That is, as described above, even if the depression and the pressing portion are provided at the bottom of the container main body, the water vapor noria property is not impaired. In the present invention, the water vapor barrier property is quantitatively evaluated using the water vapor transmission rate as an index. The water vapor transmission rate is the temperature after measuring the initial weight of the test body using a container with a cap and cap attached to 40-60% by volume of purified water. Store in a constant temperature and humidity room at 40 ° C ± 2 ° C and 20% relative humidity and 5% relative humidity. When 3 months have passed, weigh the specimen, and [(Initial weight—after 3 months storage) Weight) Initial filling weight of Z purified water] This is a value calculated by X100, and the smaller the water vapor permeability, the better the water vapor barrier property. In addition, when measuring the water vapor transmission rate of a container in which the container body and the inner stopper are integrally molded, if the container body filled with a predetermined amount of purified water at the time of molding is fitted with a cap, it can be used for the measurement. Oh ,.

[0024] The water vapor permeability of the container of the present invention is usually 3.3% or less, preferably 3.1% or less, and particularly preferably 3.0% or less. The water vapor transmission rate of the container can be easily controlled by changing the weight of the container body when the type of resin is the same. That is, the water vapor transmission rate can be reduced as the weight of the resin in the container body is increased. However, it is difficult to control the water vapor transmission rate of the container independently of the squeeze force by the method based on the increase or decrease of the weight of the resin in the container body. If the amount is small, the water vapor transmission rate increases. For this reason, the purpose and size of the container A suitable squeeze force is determined depending on the capacity and the like, but in actual product design, it is preferable to set the weight of the container body in consideration of the balance between the squeeze force and the water vapor transmission rate.

[0025] It has a portion whose cross-sectional area increases toward the upper side, and the internal volume is caused by the deflection of the pressing portion 15 when the pressing portion 15 is pressed by gripping the two body portions 13b, 13b of the pressing portion 15. The shape of the pressing portion 15 is not particularly limited as long as the configuration is such that the reduction is easy to reduce. Specifically, in the above-described first embodiment, the depression 14 is formed in a substantially straight line that passes through the center of the bottom 12 in the bottom view and the peripheral one end force of the bottom 12 extends toward the other end. In this way, the two left and right pressing portions 15, 15 are formed, but when viewed from the bottom, the central portion of the bottom portion 12 is also depressed in the radial direction. By forming a plurality, it is possible to form three pressing parts (three forks), four pressing parts (four forks), and a plurality of other pressing parts. FIGS. 7 to 9 show the container main body 1 having the four-pronged pressing portion 15, but by providing a large number of the pressing portions 15 in this way, the options of the pressing portion 15 to be picked with the fingertip during pressing operation are expanded. Therefore, container B can be made easy to use in addition to the effects of container A.

[0026] In the above-described embodiment, the recess 14 is formed in a substantially linear shape through the central portion of the bottom 12 when viewed from the bottom, and the peripheral one end force of the bottom 12 is also directed to the other end. That is, in the above-described embodiment, as a result of the depression 14 being formed in a substantially straight line through the center of the bottom 12 and reaching the peripheral edge in a bottom view, the depression 14 is the trunk of the container body 1. Although a part of 13 is recessed, it is also possible to adopt a form in which the recessed part 14 is formed without recessing the body part 13 by forming the recessed part 14 to the vicinity of the peripheral part of the bottom part 12. it can. As such an embodiment, for example, as shown in FIGS. 10 and 11, the recess 14 passes through the center of the bottom 12 in a bottom view, and the force near the one end of the periphery of the bottom 12 is widened toward the other end. An example is a container C that is formed in a substantially straight line shape and in which a wall surface 14a that forms the hollow portion 14 is formed in a substantially inverted V-shaped longitudinal section. In this embodiment, the appearance of the body portion 13 of the container body 1 is the same as that of the conventional hollow cylindrical shape, and the shape of the pressing portion 15 is the bifurcated shape shown in the first embodiment. Therefore, by adopting a powerful embodiment, it is possible to increase the area of the product display displayed on the outer peripheral surface of the body 13 while ensuring excellent squeeze. it can.

[0027] Further, as another example of the embodiment, a container D (see FIG. 5) in which the hollow portion 14 is substantially elliptical when viewed from the bottom, and the wall surface 14a constituting the hollow portion 14 is formed in a substantially inverted V shape in the longitudinal section. 12), the hollow portion 14 is formed in a substantially straight line that extends from one edge of the bottom portion 12 to the central portion and close to the other end, and the wall surface 14a of the hollow portion 14 has a substantially inverted V-shaped longitudinal section. The formed container E (see Figure 13) can be illustrated. In addition, regarding the shape of the vertical cross section of the wall surface 14a constituting the hollow portion 14, the above-described substantially reverse is possible as long as it has a portion where the cross-sectional area of the pressing portion 15 increases upward and is excellent in squeeze characteristics. For example, various forms such as an arch shape, a cone shape, and a truncated cone shape can be employed. The container F shown in FIGS. 14 and 15 is formed with a recess 14 in which the bottom 12 is recessed conically from the periphery of the bottom 12 to the center.

[0028] Various embodiments of the present invention have been described above. However, the present invention is not only applicable to containers in which the container body, the inner stopper, and the cap are separate members, and the container body and the inner stopper are integrally formed. It can also be applied to a sealed container.

Example

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the examples.

[0030] 1. Example of container production

The same size and shape as the product of the present invention, except that the container has the shape corresponding to the container A shown in Figs. 1 to 6 (the product of the present invention) and the bottom of the container body is not provided with a recess and a pressing part. Containers (comparative products) were produced by blow molding and injection molding, respectively. In the production of the container, three kinds of the present invention products and three kinds of comparative products having a weight of the resin of the container body of 2. lg, 2.3 g, and 2.5 g were produced. The details of the product of the present invention are as follows.

[0031] (Container body)

The container body constituting the product of the present invention is made of polyethylene (density: 0.927 gZcm ³ , Novatec LD “LM360”, Nippon Polyethylene Co., Ltd.). The container body height is 36.9 mm, and the body height is 25. Omm, diameter 21mm, open cylinder diameter 14. Omm, bottom width 4.5mm each (full capacity 5mL) in bottom view, the indentation is inside the barrel from inside the bottom It is set in a substantially inverted V shape with a depth of 10. Omm toward the upper side. The body thickness of the container body is, as an average value, 0.9 mm for a 2 lg container, 1. Omm for a 2.3 g container, and 2.5 g of a 2.5 gram resin. The container was 1.1 mm.

[0032] (Inner plug)

The inner plug constituting the product of the present invention is made of polyethylene (Sumikasen `` G202 '', Sumitomo Chemical Co., Ltd.), and the outer cylinder has an inner diameter of 10.5 mm and the inner cylinder has an outer diameter of 8. The height of the liquid injection part is set to 9 mm, the diameter of the liquid injection port is set to 2 mm, and the hole diameter of the liquid supply part is set to 0.4 mm.

[0033] (Cap)

The cap constituting the product of the present invention is made of polypropylene (Novatech PP “MG03RT”, Nippon Polypro Co., Ltd.), the top plate has a diameter of 9. Omm, the body height is 12.5 mm, and the tip tube height Is set to 6.2 mm.

[0034] 2. Squeeze and water vapor barrier properties

2.1 Squeeze power

First, 2.5 mL of phosphate buffer solution, pH 7.0 (14th revised Japanese Pharmacopoeia) was filled in the container body according to the present invention product and the comparative product manufactured in “1. A specimen with an inner plug attached to the open cylinder was used as a test specimen. Then, set the test specimen vertically downward with the inner plug down and set it at a predetermined position on the digital force gauge (IMADA DPS-5R, Inc.). The lower end of the body is about 5mm above the vertical direction), and for the comparison product, the measuring tip is placed horizontally near the center of the body of the container (about 12mm above the lower end of the body vertically). The tip is moved inward in the radial direction of the same part of the previous month and pressed, and one drop from the inlet is confirmed. The peak value of the pressing force required for dropping the phosphate buffer solution was measured with a digital force gauge as the squeeze force. In addition, since the specimens according to the present invention and the comparative article are provided with three kinds of container bodies having different weights as described above, there are a total of six kinds of forces. Five pieces were prepared, and the above measurement was performed five times for each, and the average value of these was taken as the measurement result of the test specimen. The results are shown in Table 1.

[0035] 2.2 Water vapor transmission rate First, 2.5 mL of purified water is accurately filled in the container body according to the product of the present invention and the comparative product manufactured in the above “1. Container manufacturing example”, and an inner stopper is attached to each open tube portion. A sample in which a cap was screwed onto a screw cylinder was used as a test specimen, and a value obtained by measuring the weight of the test specimen was defined as an initial weight. Next, the specimen is immediately stored in a constant temperature and humidity room at a temperature of 40 ° C ± 2 ° C and a relative humidity of 20% ± 5%. After 3 months, the weight is measured and the water vapor transmission rate (= [ (Initial weight—weight after 3 months storage) Z2. 5] X 100) was calculated. There are a total of 6 types of test specimens related to the product of the present invention and comparative products. In the above measurement, 10 test specimens were prepared, and the average value of each specimen was taken as the measurement result of the test specimen. The results are shown in Table 1. FIG. 16 shows a plot of the squeeze force and water vapor transmission rate obtained above.

[0036] [Table 1]

: 2.5mL

[0037] From Table 1, when comparing the squeeze force of the product of the present invention and the comparative product when the weight of the resin in the container body is the same, the squeeze force of the product of the present invention is 50% of the comparative product regardless of the weight of the resin The fact that it declined before and after became a force. In addition, regarding the water vapor transmission rate, although it depends on the weight of the resin, the product of the present invention and the comparative product showed almost the same value. From these results, it can be said that the product of the present invention is a container excellent in squeeze property while ensuring substantially the same water vapor property as a conventional container (comparative product). In addition, according to FIG. 16, which is a graph of Table 1, it can be seen that the squeeze force and the water vapor transmission rate are in a proportional relationship, and both of these can be controlled by the weight of the container body. Therefore, the water vapor transmission rate corresponding to the required squeeze force can be obtained from Fig. 16, and if the relationship between the weight of the container body and the squeeze force is obtained from Table 1, it is required. This is very convenient because the weight of the resin in the container body necessary for producing a container exhibiting a squeeze force can be obtained. Industrial applicability

The present invention can be widely used as a container having excellent squeeze characteristics when, for example, a liquid such as a chemical liquid or a cosmetic liquid is dropped.

Claims

The scope of the claims

[1] A container having a container body formed of a thermoplastic resin having a hollow cylindrical body part and a bottom part connected to the body part,

By forming a hollow portion in which the bottom portion is recessed toward the inside upper side of the trunk portion, the bottom portion includes a wall surface constituting the hollow portion, a bottom portion continuous with the wall surface, and a trunk portion continuous with the bottom portion. A hollow pressing portion having a portion with a large cross-sectional area toward the surface is formed, and when two barrel portions of the pressing portion are picked with a fingertip and the trunk portion is pressed inwardly, the interval between the pressing portions is set. The container is elastically deformed so that when the pressing operation is released, the interval between the pressing portions returns to the state before the pressing operation.

[2] The container according to claim 1, wherein the recess is formed in a substantially straight line through the center of the bottom as viewed from the bottom and to the vicinity of the peripheral edge.

[3] The container according to claim 1, wherein the hollow portion is formed in a substantially linear shape through the center portion of the bottom portion to the peripheral edge portion in a bottom view.

[4] The container according to [2] or [3], wherein the indentation is formed radially in the radial direction from the center of the bottom as viewed from the bottom.

[5] The container according to any one of [1] to [4], wherein the wall surface of the recess is formed in a substantially inverted V-shaped longitudinal section.

6. The container according to claim 5, wherein the depth of the indentation is 1Z2 to 1Z3 which is the height of the trunk.

[7] The container according to [6], wherein the body has a thickness of 0.3 to 1.5 mm.

8. The container according to claim 7, wherein the thermoplastic resin is polyethylene having a resin density of 0.91 to 0.96 gZcm ³ .

[9] The container according to any one of claims 1 to 8, which is for eye drops.