JP4052484B1 - Fluid container with airless pump - Google Patents

Abstract

In a fluid container with an airless pump, a side surface of an inner container is formed in a bellows shape in order to discharge the contents substantially completely. When the bellows shape contracts, a discharge force of the airless pump is not used without a coil spring. Only by this, the bellows shape on the side surface of the inner container is configured to be smoothly contracted.
The side surface of the inner container has a bellows structure, the maximum diameter of the inner container is 3.5 to 5 times the length of one pitch of the bellows structure, and the angle of the adjacent surface of the bellows structure is 75 ° to 95. An airless pump-equipped fluid container is provided which is configured to be in the fully contracted state, and the end of the suction pipe is positioned in the vicinity of the bottom surface of the inner container.
[Selection] Figure 1

Description

The present invention relates to a fluid container with an airless pump, and more particularly, to a fluid container with an airless pump having the following configuration.
<Configuration 1>
In a fluid container with an airless pump comprising an airless pump, an inner container made of a soft material with the airless pump attached to the mouth, and an outer container made of a hard material that accommodates the entire inner container, the side surface of the inner container is The bellows structure is formed, and the contents are discharged by the operation of the airless pump, so that the bellows structure is contracted to reduce the inner volume of the inner container, and further, the bellows structure is completely contracted. A fluid container with an airless pump, characterized in that the end of the suction pipe is positioned near the bottom surface of the inner container.
<Configuration 2>
The airless according to Configuration 1, wherein the maximum diameter of the inner container of the fluid container with an airless pump is in the range of 3.5 to 5 times the length of one pitch when the side bellows structure is fully extended. Fluid container with pump.
<Configuration 3>
When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 75 ° to 95 °. The fluid container with an airless pump according to Configuration 1 or Configuration 2, wherein the fluid container is an inside.
<Configuration 4>
When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 84 ° to 92 °. The fluid container with an airless pump according to Configuration 3, wherein the fluid container is inside.
<Configuration 5>
5. The fluid container with an airless pump according to Configuration 1, Configuration 2, Configuration 3 or Configuration 4, wherein the entire bottom surface of the inner container is formed in a downwardly convex curved shape.

  An airless pump, an inner container made of a soft material with the airless pump attached to the mouth, and a fluid container with an airless pump made of an outer container made of a hard material that accommodates the entire inner container are well known in the art. An example of the configuration is as shown in FIG. In such a fluid container with an airless pump, since the inner container is not sufficiently contracted, the content remains remarkably in the inner container, and usually 10 to 5% of the contents are not discharged, and together with the inner container. It had to be discarded. Therefore, we developed a fluid container with an airless pump that can keep the residual content to 3% or less by devising the bottom shape of the inner container, the length of the suction pipe, the thickness of the bottom surface of the inner container, etc. This container is a fluid container with an airless pump described in Patent Document 1 below.

  However, even in the fluid container with an airless pump described in Patent Document 1 below, the content remains even though the amount is 3% or less. Therefore, we devised the shape of the inner container and aimed to develop a fluid container with an airless pump that can reduce the residual content to approximately 0%. In the process, the side surface of the inner container is formed in a bellows shape, and the bottom surface of the inner container rises by folding the bellows part when contracted, allowing the contents to be completely discharged. It is the structure of the fluid container with an airless pump.

  A nozzle-equipped fluid container itself in which the side surface of the inner container is formed in a bellows shape is already known. Examples thereof are listed in Patent Documents 2 and 3 below. Among these, the “spray container” of the following Patent Document 2 is such that a piston and a coil spring are connected to the bottom surface of a soft inner container whose side surface is formed in a bellows shape, and the whole is enclosed in a hard outer container. The coil spring expands as the contents of the container decrease, the bellows-like side surface of the inner container contracts, and the contents can finally be discharged almost completely.

In addition, the “fluid discharge container” of Patent Document 3 below has a coil spring attached to the inside of a convex portion (mountain portion) of a side surface of a soft inner container whose side surface is formed in a bellows shape, and is enclosed in a hard outer container. Therefore, as the contents of the inner container decrease, the inner container is forcibly folded by the contraction force of the coil spring. The purpose of this “fluid discharge container” is to develop a “fluid discharge container” that does not use freon gas, which adversely affects the environment, and the discharge force of freon gas is replaced by the contraction force of the coil spring. Although it has the feature, the technical content which is common with the "spray container" of the following patent document 2 is disclosed in that the bellows portion of the inner container is contracted by the biasing force of the coil spring.
Japanese Patent Application No. 2006-329161 Japanese Patent Laid-Open No. 11-115977 Japanese Utility Model Publication No. 2-81648

  The “spray container” of Patent Document 2 and the “fluid discharge container” of Patent Document 3 disclose the technical contents of making the side surface of the inner container bellows and contracting the bellows part. However, there is a problem that it is difficult to put into practical use in that the bellows portion on the side surface of the inner container is contracted by the biasing force of the coil spring.

  That is, in the “fluid discharge container” of Patent Document 3, the manufacturing process is considerably complicated as compared with a conventional simple inner container, and the result must be reflected in the price. For example, the contents are stored as shampoo or cosmetic liquid in an inner container with a simple configuration, an airless pump is attached to the mouth of the inner container, and the inner container is stored in a hard outer container. In the attached fluid container, it is generally used to replace the inner container with a new inner container when the contents of the inner container are used up. This means that the container must be purchased, and the attractiveness as a so-called “refill container” (refill container) is considerably reduced.

In other words, the advantage of the “refill container” is that it is inexpensive first, but the inner container equipped with the coil spring has a complicated manufacturing process and is inevitably more expensive than a simple “refill container”. I have to be. Further, in the contraction process, since the coil spring is mounted on the inner side, the contraction is incomplete by the amount of space of the coil spring, and the residual degree of the contents is increased.

In the “spray container” of Patent Document 2, the coil spring is not attached to the inner container itself, but the coil spring and the cylinder are attached to the bottom surface of the outer container. For this, the coil spring must be contracted by some means. At this time, if the urging force of the coil spring is strong, it will be difficult to contract the coil spring. Conversely, if the coil spring is weak, it will hinder smooth contraction of the inner container during use. In any case, the operation is not as easy as storing the inner container with a simple structure in the outer container with a simple structure. Further, since the configuration of the outer container itself is complicated, the manufacturing process is naturally complicated, and this point is inevitably reflected in the cost of the “spray container” as a whole. In addition, there is a disadvantage that the entire container is bulky by the amount of the coil spring and the cylinder. That is, there is a problem that the content is small for the apparent size of the container.

  In addition, the problem common to both is that coil springs are used, so that the overall weight is heavy and difficult to handle. Furthermore, if the coil springs are made of metal, they are disassembled and discarded at the time of disposal. The point that must be done. In addition, in the case of containers such as shampoos and facial cleansing agents used in beauty salons and the like, the appearance is also a problem, so the entire container is often transparent. In such an environment, it must be predicted that the container with the coil spring exposed will still be avoided.

From the above, the problems to be solved by the present invention are set as follows.
In order to discharge the contents almost completely, the side surface of the inner container has a bellows structure. When the bellows structure is contracted, a coil spring is not used, and the bellows structure is formed on the side surface of the inner container only by the discharge force of the airless pump. Is configured to contract smoothly. For this reason, as a result of repeated examinations on various configurations of the bellows structure of the inner container, in order to perform smooth contraction only by the discharge force of the airless pump, the maximum diameter of the inner container and the bellows structure It has been found that the problem of the length of the pitch at the maximum stretching and the problem of the angle formed by two adjacent surfaces at the maximum stretching of the bellows structure are decisive. Therefore, the present invention realizes the development of a fluid container for an airless pump having an inner container that can be smoothly contracted only by the discharge force of the airless pump by adopting a bellows structure having an appropriate configuration for these two points. The subject of the invention.

The present invention has been made to solve the above-described problems, and provides the following solution.
<Solution 1>
In a fluid container with an airless pump comprising an airless pump, an inner container made of a soft material with the airless pump attached to the mouth, and an outer container made of a hard material that accommodates the entire inner container, the side surface of the inner container is The bellows structure is formed, and the contents are discharged by the operation of the airless pump, so that the bellows structure is contracted to reduce the inner volume of the inner container, and further, the bellows structure is completely contracted. A fluid container with an airless pump, characterized in that the end of the suction pipe is positioned near the bottom surface of the inner container.
<Solution 2>
The maximum diameter of the inner container of the fluid container with an airless pump is in the range of 3.5 to 5 times the length of one pitch when the maximum stretching of the side bellows structure is performed. Fluid container with airless pump.
<Solution 3>
When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 75 ° to 95 °. The fluid container with an airless pump according to Solution 1 or Solution 2, wherein
<Solution 4>
When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 84 ° to 92 °. The fluid container with an airless pump according to Solution 3, wherein the fluid container is inside.
<Solution 5>
The fluid container with an airless pump according to Solution 1, Solution 2, Solution 3, or Solution 4, wherein the entire bottom surface of the inner container is formed in a downwardly convex curved shape.

The relationship between the maximum diameter of the inner container of Solution 2 and the length of one pitch at the time of maximum stretching of the bellows structure will be described in detail as follows.
As shown in FIG. 16, the maximum diameter of the inner container 1 is φ, the length of the bellows structure B at the maximum stretch (extension in the vertical direction) is L, and the length of one pitch at the maximum stretch of the bellows structure B is PT. Then, the length L is n times the length PT. However, n = a positive integer.

Here, when the ratio RT1 between the maximum diameter φ and the length L is obtained for a commonly used inner container, RT1 falls between 2 and 5. That is,
φ: L = 1: RT1 (1)
RT1 = 2-5 (2)
Such a relationship is established.
In particular, regarding the inner container 1 of the fluid container with an airless pump used in the hairdressing and cosmetic industry, it can be said that almost all containers are within the above range.

Here, if the ratio of the length PT of one pitch to the maximum diameter φ is RT2,
PT: φ = 1: RT2 (3)
It becomes.
Therefore,
RT2 = φ / PT (4)
It becomes.
Here, when the equation (1) is transformed,
φ = L / RT1 (5)
Therefore, if the value of φ is substituted into equation (4),
RT2 = L / RT1 × PT (6)
It is. However, since L = n × PT (n is a positive integer),
RT2 = n / RT1 (7)
It becomes.

Even if the inner container 1 is the most vertically long container, that is, a container having a maximum value of RT1, the number n, that is, the number of pitches of the bellows structure is not so large. The reason for this is that the larger n is, the more complicated is the labor required for manufacturing the mold, and even when the bellows structure B is completely contracted, the entire extension is not so shortened. That is, it is desired that the length L is 1/3 or less during complete contraction. In consideration of such various conditions, the condition that the maximum value of n is 25 in the case of the container having the maximum value of RT1 of 5 is provided. Therefore, substituting n = 25 and RT1 = 5 into equation (7),
RT2 = 5
The result was obtained.
Therefore, RT2, that is, the maximum value RT2 of the ratio RT2 between the length PT of one pitch and the maximum diameter φ of the inner container 1 at the time of maximum stretching of the bellows structure B is set to 5.

Next, the minimum value of the ratio RT2, which is determined from a container whose value of the ratio RT1 is the minimum value of 2. That is, even in the flattest inner container having a ratio RT1 value of 2, a certain number n of pitches as a whole must be secured. This is because, when the maximum diameter φ and the length L are constant, the smaller the overall pitch number n, the smaller the inner volume of the container. In this way, if a certain amount of internal volume is to be secured, n must be a certain number even in a container having a minimum ratio RT1 of 2, so the condition that the minimum value of n is 7 is set from various conditions. It was. Therefore, substituting n = 7 and RT1 = 2 into equation (7),
RT2 = 3.5
The result was obtained.
Therefore, RT2, that is, the minimum value of the ratio RT2 between the maximum diameter φ of the inner container 1 and the length PT of one pitch at the time of maximum stretching of the bellows structure B is set to 3.5.

From the above, the ratio RT2, that is, the ratio RT2 between the length PT of one pitch and the maximum diameter φ of the inner container 1 at the time of maximum stretching of the bellows structure B is set in the range of 3.5 to 5. When considering the inner container with the ratio RT1 of various ratios (within the range of 2 to 5), the ratio RT2 is actually slightly lower than 4 to slightly lower than 5. Judged to be highly practical. That is, it is easy to manufacture the mold at the time of manufacture, and the total length at the time of complete contraction is considerably shorter than one third, and the ratio RT2 is 3.7 to 4.8 which has little influence on the internal volume. It can be said that it is about.

Next, the angle limitation of the two adjacent surfaces of the bellows structure of the inner container of the solving means 3 and 4 will be described in detail as follows.
As shown in FIGS. 17a to 17e, when the inner container is cut along a plane including the central axis in the longitudinal direction, an angle formed by two adjacent surfaces PL1 and PL2 of the bellows structure B on the side surface of the inner container 1 is α. To do. This angle α is the same for the two surfaces sandwiching the peak S and the two surfaces sandwiching the valley T, but in FIGS. 17a to 17e, it is indicated by two surfaces PL1 and PL2 sandwiching the valley T. .

At this time, it is obvious that the smaller the angle α is, the better the contraction performance of the inner container 1 is. However, if the angle α is too small, it becomes difficult to manufacture the mold of the inner container 1. . Further, the inner volume of the inner container 1 is also reduced. Therefore, from such a point, the result is that the angle α should not be too small.

Therefore, as a result of studying the inner container 1 with various changes in the angle α, it has been clarified that when the angle α exceeds 95 ° (FIG. 17e), a remarkable adverse effect is observed on the shrinkage performance. Therefore, the maximum value of the angle α is set to 95 °. Further, when the angle α is less than 75 ° (FIG. 17a), it is expected that the labor required for manufacturing the mold will be significantly increased, and the influence on the decrease in the internal volume will be significant. The value was 75 °. As a result of obtaining a more appropriate angle range within this range, the optimum value of the angle α was set within a range of 84 ° (FIG. 17b) to 92 ° (FIG. 17d). FIG. 17c is an example in which the angle α is 88 ° which is an intermediate angle between 84 ° and 92 °.

  According to the solution 1 of the present invention, the side surface of the inner container has a bellows structure, and the contents are discharged by the operation of the airless pump, whereby the bellows structure is contracted and the inner volume of the inner container is reduced. In addition, since the end portion of the suction pipe of the airless pump is positioned near the bottom surface of the inner container in a state where the bellows structure is completely contracted, the contents can be reduced by operating the airless pump. It is possible to discharge completely.

  In this case, since no additional components such as a coil spring are used, the manufacturing process of the inner container is as simple as the manufacturing process of the conventional inner container, and does not increase the manufacturing cost. There is no increase. Further, the residual content of the contents is much less than that including the coil spring inside, and the overall size can be made much smaller with the same internal capacity as compared with the one having the coil spring outside. Furthermore, replacement of the used inner container can be performed as easily as the conventional inner container, and there is no need for troublesome separation work when it is discarded. Further, even if the entire container is transparent, no additional items such as coil springs can be seen, so that it can be used sufficiently even at sites that emphasize the appearance of a beauty salon. In short, in terms of manufacturing process, usability, price, and appearance, it can be handled with the same feeling as a conventional fluid container with an airless pump, and it is far superior in performance and compact overall. Thus, a fluid container with an airless pump that can be formed in the following manner can be provided.

  According to the invention of Solution 2 of the present invention, the maximum diameter of the inner container of the fluid container with an airless pump is in the range of 3.5 to 5 times the length of one pitch at the maximum extension of the bellows structure. Therefore, there is no particular difficulty in making the mold at the time of production, the decrease in the inner volume of the inner container is not so remarkable, and the shrinkage performance is good, and when the shrinkage is completed, the entire length of the inner container is the original length. 1/3 or less.

According to the invention of Solution 3 of the present invention, when the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the adjacent two at the time of maximum extension of the bellows structure on the side surface of the inner container. Since the angle between the surfaces is in the range of 75 ° to 95 °, an inner container that does not adversely affect the shrinkage performance, is easy to manufacture the mold at the time of manufacture, and the reduction in the internal volume is not noticeable. Can do. Furthermore, according to the invention of Solution 4 of the present invention, since the angle is in the range of 84 ° to 92 °, the three points of smooth shrinkage performance, convenience of mold manufacture, and securing of the internal volume are comprehensive. In this case, the innermost container having the highest performance can be obtained.

According to the invention of Solution 5 of the present invention, since the entire bottom surface of the inner container is formed in a downwardly convex curved shape, the slight remaining contents at the stage when the contents are substantially discharged are , Concentrated on the bottom center of the inner container. However, since the end of the suction pipe of the airless pump reaches this portion, the content remaining at the end is almost completely sucked and discharged by the airless pump. Thereby, a fluid container with an airless pump in which the content remains approximately 0% is realized.

  The best mode for carrying out the present invention will be described in detail with reference to the drawings. 1 to 12 relate to the first embodiment of the present invention, FIG. 14 relates to the second embodiment of the present invention, and FIG. 15 relates to the third embodiment of the present invention.

<Configuration of Example 1>
The fluid container A with an airless pump according to the first embodiment of the present invention has a shape shown in FIG. 1 (right side view) or FIG. 4 (longitudinal sectional view), and has an airless pump 3 in the mouth portion 11 (see FIG. 4). Is a double structure of an inner container 1 made of a soft material and containing a content C as a fluid, and an outer container 2 made of a hard material and containing the inner container 1. The inner container 1 has a substantially cylindrical shape as a whole, the entire bottom surface 13 is formed in a downwardly convex curved shape, and the side surface 12 is configured as a bellows structure B.

  The inner container 1 is made of transparent polyethylene, and as shown in FIG. 11, a mouth portion 11, a side surface 12, and a bottom surface 13 having a convex curved surface are integrally formed. As shown in FIG. 8 and FIG. 11, the mouth portion 11 has a reduced diameter portion 11a that is reduced in diameter as the upper end is directed upward, a cylindrical main body portion 11c, and a connecting portion 11b that connects the main body portion 11c and the reduced diameter portion 11a. The reduced diameter portion 11a, the connecting portion 11b, and the main body portion 11c are all configured as one body. The main body portion 11c is provided with a spiral ridge R1 that is integrally provided with the main body portion 11c. The ridge R1 is provided on the inner side of the cap 34 of the airless pump 3 ( By engaging with the cap 34 via the packing P1, the airless pump 3 is attached to the inner container 1 in an airtight manner. is there. The connecting portion 11b has flat plate-like convex portions 11d and 11e protruding integrally with the connecting portion 11b, and the protruding portions 11d and 11e are peripheral edges of the circular hole HR of the umbrella portion 4 (see FIG. 12b). The inner container 1 and the umbrella part 4 are relatively rotated by being engaged with the recesses 43a and 43c or the recesses 43b and 43d among the recesses 43a to 43d provided around the rim portion 43 at intervals of 90 °. It plays a role of fixing so as not to move.

  The configuration of the side surface 12 of the inner container 1 will be described in detail below. The side surface 12 has a bellows structure B, and peaks S and valleys T appear alternately. 4 and 5 are longitudinal sectional views cut along a plane including the central axis X in the longitudinal direction of the inner container 1 of the fluid container A with an airless pump. In FIG. 5, the valley portion T or the mountain portion S are adjacent to each other. If the angle formed by the surfaces PL1 and PL2 is α, the bellows structure B is configured so that the angle α is in the range of 75 ° to 95 °.

  The numerical limitation of the range of the angle α is as described above, and it has been found that the best result can be obtained in the range of 75 ° to 95 °, particularly in the range of 84 ° to 92 °. Note that the angle α in FIG. 5 is 88 °. Further, as described above, the numerical limitation of the ratio RT2 between the length PT of one pitch and the maximum diameter φ of the inner container 1 at the time of maximum stretching of the bellows structure B is 3.5 to 5, but the airless pump of Example 1 In the case of the fluid container A, this ratio RT2 is 4.2. Furthermore, the material of the inner container 1 is polyethylene which is usually used for the inner container of a general fluid container with an airless pump, and the thickness is approximately the same as the thickness of the ordinary inner container.

  The outer container 2 is made of a transparent acrylic resin, and as shown in FIGS. 4 and 5, a cylindrical side surface 21 and a disc-shaped bottom surface 22 that are slightly enlarged in diameter toward the upper side are integrally formed. A spiral protrusion R3 is formed integrally with the side surface 21 at the upper end portion 21a. The protrusion R3 is engaged with a protrusion R4 having a shape of a part of a spiral projecting on the inner surface of the flange part 42 of the umbrella part 4 (see FIGS. 12a to 12c), which will be described later. Is screwed to the upper end portion 21a of the outer container 2. The diameter of the outer container 2 is configured to be slightly larger than the diameter of the inner container 1 so that the inner container 1 can be stored in a state of being separated from the inner surface of the outer container 2 with a slight gap. .

  Since the airless pump 3 is a known airless pump, a detailed description of the internal structure is omitted, and only the points that need to be described in relation to other configurations are described. As shown in FIG. 11, the airless pump 3 includes a neck portion 31 having a discharge port 31a, a main body portion 32 connected to the neck portion 31, a cylindrical suction pipe 33 connected to the lower end of the main body portion 32, and The cap 34 is provided around the joint portion of the main body 32 and the neck 31. SP (see FIG. 8) is a spring built in the main body 32, and serves to restore the neck 31 to its original position when the neck 31 is pushed down.

  As shown in FIGS. 7 and 8, the end 33 a of the suction pipe 33 is configured to be positioned near the bottom surface 13 of the inner container 1 in a state where the bellows structure B is completely folded. Specifically, the distance between the end portion 33a and the central portion of the bottom surface 13 is set to be 1 mm or less, whereby substantially complete discharge of the contents C is realized. . In determining the positional relationship between the end portion 33a of the suction pipe 33 and the bottom surface 13 of the inner container 1, first, the inner container 1 is brought into a completely contracted state, and in this state, the distance between the end portion 33a and the central portion of the bottom surface 13 is set. The length of the suction pipe 33 is determined so as to be 1 mm or less.

  As shown in FIGS. 12 a to 12 c, the umbrella portion 4 is entirely umbrella-shaped and has a main body portion 41 that is reduced in diameter toward the upper side, a flange portion 42 that is suspended downward from the lower end of the main body portion 41, and a main body portion. A rim portion 43 projecting in a ring shape inward from the upper end of 41 is integrally formed, and has a circular hole HR surrounded by the rim portion 43 at the top. In addition, concave portions 43a, 43b, 43c, 43d are circumferentially provided on the bottom surface of the rim portion 43 at intervals of 90 ° in the circumferential direction. R4 and R4 are projected.

  As shown in FIG. 8, the umbrella portion 4 has the mouth portion 11 of the inner container 1 inserted through the circular hole HR, and the upper end surface of the connection portion 11 b of the mouth portion 11 and the lower end surface of the cap 34 of the airless pump 3. The rim part 43 of the umbrella part 4 is fixed by being sandwiched therebetween. At this time, the convex portions 11d and 11e (see FIGS. 8 and 11) of the mouth portion 11 of the inner container 1 are replaced with the concave portions 43a and 43c of the rim portion 43 of the umbrella portion 4 or 43b and 43d (see FIGS. 12a to 12c). The relative rotation of the umbrella part 4 and the inner container 1 is prevented by being fitted on. Further, as described above, the opening 11 of the inner container 1 is screwed and fixed to the cap 34 of the airless pump 3 via the packing P1, and the flange portion 42 of the umbrella 4 is fixed to the upper end 21a of the outer container 2 by screwing. Therefore, in the fluid container A with an airless pump of the first embodiment, all members except the neck portion 31 of the airless pump 3 are integrally fixed, and relative rotation between the members is prevented. Only the neck portion 31 of the airless pump 3 is configured to be rotatable with respect to the main body portion 32.

  13a and 13b show a state when the inner container 1 is circulated independently. That is, since the inner container 1 is circulated in the state shown in FIG. 13b in which the cap CP is screwed through the packing P2 with the contents C (see FIG. 4) filled therein, the user (FIG. When not in use, the cap CP is removed (the packing P2 is removed integrally with the cap CP), the umbrella portion 4 and the airless pump 3 are attached to the mouth portion 11, and the entire inner container 1 is attached to the outer container 2. In this state (see FIG. 1).

<Operation of Example 1>
As shown in FIGS. 1 and 4, the fluid container A with an airless pump according to the first embodiment is in a state in which the airless pump 3 is mounted and the contents C are filled in the inner container 1 as shown in FIGS. 1 and 4. If a user (not shown) repeatedly presses and releases the neck 31 of the airless pump 3 in this state, the contents C are sucked from the suction pipe 33 and discharged from the discharge port 31a. When the use is repeated in this way, the bellows structure B on the side surface 12 of the inner container 1 contracts as the contents C are pumped, and the intermediate stages are as shown in FIGS.

  That is, the bellows structure B on the side surface 12 of the inner container 1 is folded in order from the top. And when the whole bellows structure B is finally folded, it will be in the state shown in FIG. 3, FIG. In this state, the end 33a of the suction pipe 33 approaches so as to almost come into contact with the central portion of the bottom surface 13 of the inner container 1 (1 mm or less). Even if the contraction of the bellows structure B is completed, the discharge of the contents C proceeds as long as the end portion 33a of the suction pipe 33 is immersed, and finally, as shown in FIGS. It remains in the central portion of the bottom surface 13. However, if the fluid container A with an airless pump is held vertically, the end portion 33a of the suction pipe 33 comes into contact with the contents C remaining in the central portion of the bottom surface 13, so that the end portion 33a is in the central portion of the bottom surface 13. Even if it is not in contact with the surface, substantially all of the content C remaining due to the surface tension is discharged.

  The important point here is that it is necessary to hold the fluid container A with an airless pump vertically when the remaining portion of the content C is finally completely discharged. As long as the state where the end 33a of the pipe 33 is immersed in the contents C is maintained, the fluid C can be discharged even if the fluid container A with an airless pump is appropriately inclined or further inverted. It is that. Accordingly, it goes without saying that in the use start state (see FIGS. 1 and 4), the fluid container A with the airless pump is inverted even when more than half of the contents C are discharged as shown in FIG. Can be discharged. In short, the fluid container A with an airless pump according to the first embodiment can be used by being tilted and inverted freely except for the final stage in which the content C remains very little. This can be said to be an effect made possible by configuring the bellows structure B and the suction pipe 33 on the side surface 12 of the container 1 to be extremely short.

  FIG. 8 and FIG. 9 show details of the state in which the flanges F, F,... Of the bellows structure B are folded. The ridges F, F,... Are folded so that the mountain S is pulled up. That is, the lower surface 12b is folded so as to approach the surface 12a connected to the reduced diameter portion 11a of the mouth portion 11, and the surface 12c is folded in the form of being pulled up to the surface 12b, and further raised to the surface 12c. In the form that the surface 12d is folded in the form, the folds F, F,... Are eventually folded in a state where the mountain portion S is pulled up.

When the contents C are almost completely discharged in this way, the inner container 1 has a shape as shown in FIGS. 8 and 10b. In this state, the user (not shown) takes out the inner container 1 from the outer container 2, removes the umbrella part 4 and the airless pump 3, and discards the used inner container 1. Then, the cap CP of the new inner container 1 filled with the contents C is removed, the umbrella part 4 and the airless pump 3 are attached to the mouth part 11, and the inner container 1 is stored in the outer container 2. By doing in this way, the fluid container A with an airless pump of Example 1 can be reused.

  As shown in FIG. 14, the fluid container AA with an airless pump according to the second embodiment is an airless pump 30 that can lock the airless pump 3 in the configuration of the fluid container A with an airless pump according to the first embodiment. . The airless pump 30 that can be locked is described in detail in the above-mentioned Patent Document 1. The inner container 10 has substantially the same configuration as the inner container 1 of the fluid container A with an airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the inner container 1. The configuration of the bellows structure BB is substantially the same as the configuration of the bellows structure B of the inner container 1 of the fluid container A with the airless pump of the first embodiment, and the operation is also substantially the same. Furthermore, the outer container 20 has substantially the same configuration as the outer container 2 of the fluid container A with an airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the outer container 2. The umbrella portion 40 is substantially the same in configuration as the umbrella portion 4 of the fluid container A with the airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the umbrella portion 4.

As shown in FIG. 14, a fluid container AAA with an airless pump according to the third embodiment is obtained by replacing the airless pump 3 with a gun-type airless pump 300 in the configuration of the fluid container A with an airless pump according to the first embodiment. The inner container 100 has substantially the same configuration as the inner container 1 of the fluid container A with an airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the inner container 1. The configuration of the bellows structure BBB is substantially the same as the configuration of the bellows structure B of the inner container 1 of the fluid container A with the airless pump of the first embodiment, and the operation is also substantially the same. Further, the outer container 200 is substantially the same in configuration as the outer container 2 of the fluid container A with an airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the outer container 2. Further, the umbrella part 400 has substantially the same configuration as the umbrella part 4 of the fluid container A with an airless pump of the first embodiment, but the ratio of the diameter and the height is slightly different from that of the umbrella part 4.

  As described above, the fluid container with an airless pump of the present invention drastically reduces the remaining ratio of the contents compared to the conventional fluid container with an airless pump by adopting the bellows structure, and discharges the contents almost completely. Successful and groundbreaking. In other words, it is extremely useful for protecting resources and improving economic efficiency, and is widely used in various fields where fluid containers with airless pumps are used, in the hairdressing and beauty industry, the sanitary field for home use, the food container field, etc. It is expected.

It is a right view of the fluid container with an airless pump of Example 1 of this invention. It is explanatory drawing explaining an effect | action of the fluid container with an airless pump of Example 1 of this invention. It is explanatory drawing explaining an effect | action of the fluid container with an airless pump of Example 1 of this invention. It is the longitudinal cross-sectional view seen from the right side of the fluid container with an airless pump of Example 1 of this invention. It is the elements on larger scale which abbreviate | omitted a part of FIG. It is explanatory drawing explaining an effect | action of the fluid container with an airless pump of Example 1 of this invention. It is explanatory drawing explaining an effect | action of the fluid container with an airless pump of Example 1 of this invention. It is explanatory drawing explaining an effect | action of the fluid container with an airless pump of Example 1 of this invention. It is the enlarged view of the principal part which showed a part of FIG. 8 with the virtual line. (A) It is an external appearance perspective view of the state which attached the airless pump to the inner side container of the fluid container with an airless pump of Example 1 of this invention. (B) It is an external appearance perspective view of the state which mounted | wore the inner container of the fluid container with an airless pump of Example 1 of this invention with the airless pump, and the state which the shrinkage | contraction of the inner container was completed is shown. It is explanatory drawing explaining the assembly | attachment structure of the inner side container and airless pump of the fluid container with an airless pump of Example 1 of this invention. (A) It is a longitudinal cross-sectional view of the umbrella part of the fluid container with an airless pump of Example 1 of this invention. (B) It is a bottom view of the umbrella part of the fluid container with an airless pump of Example 1 of this invention. (C) It is the external appearance perspective view which looked at the umbrella part of the fluid container with an airless pump of Example 1 of this invention from the bottom face side. (A) It is explanatory drawing explaining the assembly | attachment structure of the inner side container and cap of the fluid container with an airless pump of Example 1 of this invention. (B) It is an external appearance perspective view which shows the state which screwed the cap to the inner side container of the fluid container with an airless pump of Example 1 of this invention. It is the longitudinal cross-sectional view seen from the right side of the fluid container with an airless pump of Example 2 of this invention. It is the longitudinal cross-sectional view seen from the right side of the fluid container with an airless pump of Example 3 of this invention. It is explanatory drawing explaining each part dimension of the inner side container of the fluid container with an airless pump of this invention. (A) It is explanatory drawing which shows the detail of the bellows structure of the inner side container of the fluid container with an airless pump of this invention. (B) It is explanatory drawing which shows the detail of the bellows structure of the inner side container of the fluid container with an airless pump of this invention. (C) It is explanatory drawing which shows the detail of the bellows structure of the inner side container of the fluid container with an airless pump of this invention. (D) It is explanatory drawing which shows the detail of the bellows structure of the inner side container of the fluid container with an airless pump of this invention. (E) It is explanatory drawing which shows the detail of the bellows structure of the inner side container of the fluid container with an airless pump of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner container 11 Mouth part 11a Reduced diameter part 11b Connection part 11c Main body part 11d Convex part 11e Convex part 12 Side surface 12a Surface 12b Surface 12c Surface 12d Surface 13 Bottom surface 2 Outer container 20 Outer container 21 Side surface 21a Upper end portion 22 Bottom surface 200 Outer container DESCRIPTION OF SYMBOLS 3 Airless pump 30 Airless pump 31 Neck part 31a Discharge port 32 Main body part 33 Suction pipe 33a End part 34 Cap 300 Airless pump 4 Umbrella part 40 Umbrella part 41 Main body part 42 Flange part 43 Rim part 43a Recess 43b Recess 43c Recess 43d Recess 43 Umbrella A Fluid container with airless pump AA Fluid container with airless pump AAA Fluid container with airless pump B Bellows structure BB Bellows structure BBB Bellows structure C Contents CP Cap F 襞 HR Circular hole L Length P1 Packing P2 Packing PL1 Surface PL2 PT length R1 protrusion R2 protrusion R3 protrusion R4 ridges RT1 ratio RT2 ratio S crest SP spring T troughs X central axis α angle φ maximum diameter

Claims (5)

  In a fluid container with an airless pump comprising an airless pump, an inner container made of a soft material with the airless pump attached to the mouth, and an outer container made of a hard material that accommodates the entire inner container, the side surface of the inner container is The bellows structure is formed, and the contents are discharged by the operation of the airless pump, so that the bellows structure is contracted to reduce the inner volume of the inner container, and further, the bellows structure is completely contracted. A fluid container with an airless pump, characterized in that the end of the suction pipe is positioned near the bottom surface of the inner container. The maximum diameter of the inner container of the fluid container with an airless pump is in the range of 3.5 to 5 times the length of one pitch at the time of maximum stretching of the side bellows structure. Fluid container with airless pump.   When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 75 ° to 95 °. The fluid container with an airless pump according to claim 1 or 2, wherein the fluid container is inside.   When the inner container of the fluid container with an airless pump is cut along a plane including the central axis in the longitudinal direction, the angle formed by the two adjacent surfaces at the maximum extension of the bellows structure on the side surface of the inner container is in the range of 84 ° to 92 °. The fluid container with an airless pump according to claim 3, wherein the fluid container is inside. 5. The fluid container with an airless pump according to claim 1, wherein the entire bottom surface of the inner container is formed in a downwardly convex curved shape.

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