JP7696682B2 - Dropper container - Google Patents

Description

The present invention relates to a dropper container that can dispense liquid contents such as lotion or medicinal liquid stored in the container body using a dropper function.

Conventionally, a dropper container like the one described above is known that has an automatic suction function that allows the liquid contents to be automatically sucked up into the dropper tube by removing the cap attached to the mouth of the container body from the mouth, without using a metal spring, and is configured so that after the cap is removed from the mouth, the sucked up liquid contents can be discharged to the outside from the tip of the dropper tube by pressing a pressure part provided at the top end of the cap (see, for example, Patent Document 1).

JP 2016-033056 A

However, in the conventional dropper containers described above, the pressing part is located at the top end of the cap, so after removing the cap from the mouth, it is necessary to press the pressing part with the index finger while holding the cap in the hand, which poses the problem of difficult operation.

The present invention was made in consideration of these problems, and its purpose is to provide a dropper container with an automatic suction function that makes it easy to dispense the liquid contents.

The dropper container of the present invention comprises a container body having a cylindrical mouth, a screw cap attached to the mouth by a screw connection so as to be freely attached and detached, a cylinder attached to the screw cap, a piston attached to the inside of the cylinder so as to be freely movable in the vertical direction and to define a cylinder chamber, a dropper tube held by the screw cap, the lower end of which is disposed inside the container body and the upper end of which is capable of communicating with the cylinder chamber, and a dropper tube formed in an elastically deformable shape with an internal space, which is airtightly attached to the outside of the cylinder and the internal space is connected to the cylinder chamber through a horizontal hole provided in the cylinder. The screw cap has a pressing part that presses the screw into the piston, a peripheral wall that has a window, an overcap that is attached to the outside of the screw cap so that it can rotate relatively around the axis between a first position where the window is offset by a predetermined angle from the pressing part in the direction of tightening the screw, and a second position where the window faces the pressing part, and a conversion mechanism that has a spiral groove that is provided on either the piston or the screw cap and extends at the predetermined angle in the reverse screw direction centered on the axis, and an engagement protrusion that is provided on the other of the piston and the screw cap and can move along the spiral groove.

In the dropper container of the present invention, in the above configuration, it is preferable that a pair of the pressing parts is provided on both sides of the axis of the cylinder, and a pair of the windows is provided on both sides of the axis of the peripheral wall.

In the above-described configuration of the dropper container of the present invention, it is preferable that the screw cap has an inner wall that faces the window and closes the window when the overcap is in the first position.

In the dropper container of the present invention, in the above configuration, it is preferable that the predetermined angle is 90 degrees and the inner wall is positioned circumferentially offset by 90 degrees from the pressing portion.

In the above-described configuration of the dropper container of the present invention, it is preferable that the piston has a blocking portion that blocks the communication hole that connects the cylinder chamber and the dropper tube when the overcap is in the first position.

In the above-mentioned configuration of the dropper container of the present invention, it is preferable that the piston has a piston guide in which the spiral groove or the engagement protrusion is provided, and a piston body formed in an annular shape from an elastic body, attached to the piston guide, and in contact with the inner peripheral surface of the cylinder.

In the dropper container of the present invention, in the above configuration, it is preferable that the piston body has a slit, and the piston guide has a protruding rib that engages with the slit to prevent the piston from rotating relative to the piston guide.

In the above-mentioned configuration of the dropper container of the present invention, it is preferable that the mouth is fitted with a stopper having a cylindrical portion through which the dropper tube is inserted and a spiral convex portion provided on the inner peripheral surface of the cylindrical portion and in contact with the outer peripheral surface of the dropper tube.

The present invention provides a dropper container with an automatic suction function that allows the liquid content to be easily dispensed.

FIG. 2 is a cross-sectional view of a dropper container according to an embodiment of the present invention as viewed from the front. 2 is a front cross-sectional view of the upper half of the dropper container shown in FIG. 1 . 2 is a cross-sectional side view of the upper half of the dropper container shown in FIG. 1 . 2 is a cross-sectional view taken along line AA in FIG. 1. 1 is a cross-sectional front view of the dropper container with the overcap rotated from a first position to a second position; FIG. 1 is a cross-sectional side view of the dropper container with the overcap rotated from a first position to a second position. FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. (a) is an exploded view showing details of the engagement state between the spiral groove and the engagement protrusion when the overcap is in a first position, and (b) is an exploded view showing details of the engagement state between the spiral groove and the engagement protrusion when the overcap is in a second position. 13 is a diagram showing how the content liquid is discharged from the dropper tube to the outside after the screw cap is removed from the mouth of the container body. FIG. 13 is a diagram showing a state in which the content liquid is being sucked up from inside the container body into a dropper tube with the screw cap removed from the mouth of the container body. FIG.

The present invention will now be described in more detail with reference to the drawings.

As shown in FIG. 1, a dropper container 1 according to one embodiment of the present invention has an automatic suction function and includes a container body 10 and a dropper cap 20. FIG. 1 shows the state in which the dropper cap 20 is attached to the container body 10.

In this specification and claims, the up-down direction refers to the up-down direction when the dropper container 1 is in an upright position as shown in FIG. 1, the radial direction refers to the direction passing through the axis O of the container body 10 and perpendicular to the axis O, and the circumferential direction refers to the circumferential direction centered on the axis O.

The container body 10 is bottle-shaped, with a cylindrical mouth 11 centered on the axis O and a body 12 that is integral with the lower end of the mouth 11, and can store the liquid content inside. A male screw 13 is integrally formed on the outer periphery of the mouth 11.

The container body 10 can be, for example, a blow molded product made of synthetic resin, an injection molded product made of synthetic resin, a glass bottle, etc.

The dropper cap 20 includes a screw cap 21, a cylinder 22, a piston 23, a dropper tube 24, a pressure member 25, an overcap 26, and a conversion mechanism 27.

As shown in FIG. 2, the screw cap 21 has a cylindrical mounting tube 21a and a flange portion 21b that extends radially inward from the upper end of the mounting tube 21a. A female thread 21c is integrally formed on the inner peripheral surface of the mounting tube 21a, and the screw cap 21 is detachably attached to the mouth portion 11 by threading the female thread 21c into the male thread 13.

The cylinder 22 is cylindrical and centered on the axis O, and is connected to the upper part of the flange portion 21b and is integral with the screw cap 21. A communication hole 22b that passes through the partition wall 22a in the vertical direction is provided in the partition wall 22a at the lower end of the cylinder 22. In addition, a cylindrical retaining tube 22c centered on the axis O is integrally provided on the lower surface of the partition wall 22a radially outward from the communication hole 22b.

The piston 23 is mounted inside the cylinder 22 so that it can move up and down freely, and defines a cylinder chamber 28 between the piston 23 and the cylinder 22.

In this embodiment, the piston 23 is configured to include a piston guide 23a and a piston body 23b attached to the piston guide 23a. The piston guide 23a includes a large diameter portion 23c and a small diameter portion 23d connected to the lower part of the large diameter portion 23c, and is supported by the inner peripheral surface of the cylinder 22 at the large diameter portion 23c. The piston body 23b is formed in an annular shape from an elastic body such as synthetic rubber or elastomer, is fitted and fixed to the outside of the small diameter portion 23d, and is in contact with the inner peripheral surface of the cylinder 22 at its outer periphery.

In this embodiment, the piston body 23b has a slit 23e, and a convex rib (not shown) provided on the small diameter portion 23d of the piston guide 23a engages with the slit 23e, thereby preventing the piston body 23b from rotating in the circumferential direction relative to the piston guide 23a.

Furthermore, in this embodiment, the piston 23 has a blocking portion 23g that protrudes downward from the lower end of the small diameter portion 23d. When the piston 23 is at the lower end position inside the cylinder 22, the blocking portion 23g fits inside the communication hole 22b, blocking the communication hole 22b.

The piston guide 23a has a guide cylinder 23h integrally formed on the upper side of the large diameter portion 23c.

The dropper tube 24 is a long, thin, circular tube that extends vertically. The fitting tube portion 24a at the top end fits and undercuts the outside of the retaining tube 22c, and the flange portion 24b fits and undercuts the inside of the mounting tube 21a, so that it is held in a fixed state by the screw cap 21.

As shown in FIG. 1, when the screw cap 21 is attached to the mouth 11, the lower end of the dropper tube 24 is located near the bottom of the barrel 12 inside the container body 10.

On the other hand, as shown in FIG. 2, the upper end of the dropper tube 24 can communicate with the cylinder chamber 28 through the communication hole 22b. That is, as shown in FIG. 5 and FIG. 6, when the piston 23 moves upward and the blocking portion 23g comes out of the communication hole 22b, the dropper tube 24 communicates with the cylinder chamber 28 through the communication hole 22b.

As shown in FIG. 2, the dropper container 1 can also be configured with a squeeze plug 40 attached to the mouth 11 of the container body 10. The squeeze plug 40 is made of an elastic material such as synthetic rubber or elastomer, and includes a cylindrical portion 41 through which the dropper tube 24 is inserted, and a spiral convex portion 42 integrally provided on the inner peripheral surface of the cylindrical portion 41. The convex portion 42 is in contact with the outer peripheral surface of the dropper tube 24 in a state where it is elastically deformed radially outward.

By attaching such a squeezing plug 40 to the mouth 11, when the dropper cap 20 is removed from the container body 10, the liquid contents adhering to the outer surface of the dropper tube 24 are squeezed off by the convex portion 42, thereby preventing the liquid contents from dripping out when the dropper cap 20 is removed from the container body 10.

In addition, by making the convex portion 42 spiral, the liquid contents squeezed out from the outer surface of the dropper tube 24 by the convex portion 42 flow down along the spiral convex portion 42 toward the inside of the container body 10, preventing the liquid contents remaining in the convex portion 42 from scattering when the dropper tube 24 is inserted into or removed from the mouth 11.

In this embodiment, the pressing portions 25 are provided on both sides of the axis O of the cylinder 22.

The pair of pressing parts 25 are each formed in a dome shape with an internal space 25a and capable of elastic deformation in the radial direction, and are airtightly attached to the outside of the cylinder 22. More specifically, as shown in Figures 2 and 4, an annular mounting part 29 is integrally provided on both outside sides of the axis O of the cylinder 22, and the pair of pressing parts 25 are airtightly (and liquidtightly) attached to the mounting parts 29 by fitting their peripheral parts into annular grooves 29a provided in the corresponding mounting parts 29.

The cylinder 22 also has a pair of horizontal holes 22d on either side of the axis O, and the internal space 25a of each pressing portion 25 is connected to the cylinder chamber 28 through the corresponding horizontal hole 22d. Therefore, when the pair of pressing portions 25 are pressed radially inward and elastically deformed, the pressure inside the cylinder chamber 28 is increased, and the liquid content inside the dropper tube 24 is discharged to the outside from its lower end.

In the state shown in FIG. 2, each of the horizontal holes 22d is blocked by the piston body 23b.

As shown in FIG. 2, the overcap 26 is cylindrical with a top and includes a cylindrical peripheral wall 26a and a top wall 26b centered on the axis O, and is attached to the outside of the screw cap 21 to cover the screw cap 21, the cylinder 22, the piston 23, and the pressing portion 25. An annular groove 26c is provided on the inner peripheral surface of the lower end of the peripheral wall 26a, and an annular protrusion 21d provided on the outer peripheral surface of the lower end of the mounting tube 21a of the screw cap 21 engages with this annular groove 26c, thereby preventing the overcap 26 from coming off the screw cap 21.

As shown in Figures 3 and 4, the peripheral wall 26a has windows 26d. In this embodiment, a pair of windows 26d corresponding to a pair of pressing portions 25 are provided on both sides of the axis O of the peripheral wall 26a. Each window 26d is large enough that when the window 26d faces a pressing portion 25, the pressing portion 25 can be pressed radially inward with a finger from the outside of the overcap 26.

The overcap 26 is rotatable about the axis O relative to the screw cap 21 between a first position (position shown in Figs. 2, 3, and 4) where the pair of windows 26d are shifted by a predetermined angle in the direction of tightening the screw relative to the corresponding pressing portion 25, and a second position (position shown in Figs. 5, 6, and 7) where the pair of windows 26d face the corresponding pressing portion 25. In this embodiment, as shown in Fig. 4, when the overcap 26 is in the first position, the predetermined angle by which the pair of windows 26d are shifted in the direction of tightening the screw relative to the corresponding pressing portion 25 is 90 degrees. That is, when the overcap 26 is in the first position, as shown in Figs. 2 and 4, the pair of pressing portions 25 are covered by the peripheral wall 26a of the overcap 26, and when the overcap 26 rotates to the second position relative to the screw cap 21, the pair of pressing portions 25 face the windows 26d, respectively, as shown in Figs. 5 and 7, and can be pressed from the outside of the overcap 26 through the windows 26d.

As shown in Figures 3 and 4, the screw cap 21 can also be configured with an inner wall 21e. In this embodiment, a pair of inner walls 21e corresponding to the pair of windows 26d are provided at the upper end of the mounting tube 21a of the screw cap 21, each of which is offset 90 degrees in the circumferential direction from the pressing portion 25. Each inner wall 21e is formed in an arc shape that is larger in circumferential width and vertical dimension than the window 26d.

3 and 4, when the overcap 26 is in the first position, each inner wall 21e faces the corresponding window 26d from the radially inner side and closes the window 26d. In this way, when the overcap 26 is in the first position, the pair of pressing portions 25 are covered by the peripheral wall 26a and the pair of windows 26d are closed by the inner wall 21e, preventing the pressing portions 25 from being visible through the windows 26d and thus preventing the appearance of the dropper cap 20 from being damaged.

The overcap 26 is prevented from rotating with respect to the piston 23. That is, as shown in FIG. 2, a rotation prevention mechanism 43 is provided between the inner peripheral surface of the peripheral wall 26a of the overcap 26 above the window 26d and the upper end portion of the guide cylinder 23h of the piston 23. As the rotation prevention mechanism 43, various configurations can be adopted, such as a configuration in which a spline extending in the vertical direction on the inner peripheral surface of the peripheral wall 26a is engaged with a spline extending in the vertical direction on the outer peripheral surface of the guide cylinder 23h. By providing the rotation prevention mechanism 43, when the overcap 26 rotates in the circumferential direction relative to the screw cap 21, the piston 23 rotates in the circumferential direction relative to the screw cap 21 together with the overcap 26.

As shown in FIG. 2, the conversion mechanism 27 is provided between the screw cap 21 and the piston 23. Specifically, a pair of legs 21f are integrally provided symmetrically on the upper end of the cylinder 22 with respect to the axis O, and an engagement protrusion 27a is provided protruding radially outward from the pair of legs 21f. Meanwhile, the guide cylinder 23h of the piston 23 is provided with a pair of spiral grooves 27b extending in the reverse screw direction centered on the axis O at a predetermined angle, i.e., an angle range of 90 degrees, and the engagement protrusion 27a engages with the pair of spiral grooves 27b movably along the spiral grooves 27b, thereby forming the conversion mechanism 27.

When the overcap 26, which is prevented from rotating relative to the piston 23, is in the first position, as shown in FIG. 8(a), the engagement protrusion 27a is located at the upper stroke end of the spiral groove 27b. When the engagement protrusion 27a abuts against the upper stroke end of the spiral groove 27b, the rotation of the overcap 26 from the first position relative to the screw cap 21 in the direction of tightening the screw is restricted.

On the other hand, when the overcap 26 rotates together with the piston 23 from the first position relative to the screw cap 21 in the direction to loosen the screw and reaches the second position, as shown in FIG. 8(b), the engagement protrusion 27a moves along the spiral groove 27b and is positioned at the lower stroke end of the spiral groove 27b. When the engagement protrusion 27a abuts against the lower stroke end of the spiral groove 27b, further rotation of the overcap 26 from the second position relative to the screw cap 21 in the direction to loosen the screw is restricted.

When the overcap 26 rotates together with the piston 23 from the first position to the second position relative to the screw cap 21, the engagement protrusion 27a moves along the spiral groove 27b, converting the rotational displacement into an upward displacement. As a result, when the overcap 26 rotates together with the piston 23 from the first position to the second position relative to the screw cap 21, the piston 23 moves upward from the position shown in Figures 2 and 3 to the position shown in Figures 5 and 6. When the piston 23 moves upward, the cylinder chamber 28 expands, creating a negative pressure inside, and the occlusion portion 23g leaves the communication hole 22b, connecting the cylinder chamber 28 to the internal flow path of the dropper tube 24.

Next, we will explain the operation of the dropper container 1 having the above configuration.

When not in use or before use, the dropper container 1 is in a state in which the overcap 26 is in the first position as shown in Figure 2. As a result, as described above, the pair of pressing portions 25 are covered by the peripheral wall 26a and the pair of windows 26d are blocked by the inner wall 21e, preventing the appearance of the dropper cap 20 from being marred. In addition, since the piston 23 is in the lower end position, the communication hole 22b is blocked by the blocking portion 23g, effectively preventing leakage of the content liquid into or out of the overcap 26 via the cylinder 22.

When dispensing the liquid contents, rotate the overcap 26 in the loosening direction relative to the container body 10 from the state shown in Figure 2 to remove the dropper cap 20 from the mouth 11.

2, the overcap 26 rotates relative to the screw cap 21 from the first position to the second position, i.e., spins free, without the screw cap 21 rotating relative to the mouth 11. When the overcap 26 rotates relative to the screw cap 21 from the first position to the second position, the piston 23 rises from the position shown in Figs. 2 and 3 to the position shown in Figs. 5 and 6 due to the action of the conversion mechanism 27, the cylinder chamber 28 expands, the inside becomes negative pressure, and the blocking portion 23g leaves the communication hole 22b, and the cylinder chamber 28 communicates with the internal flow path of the dropper tube 24. As a result, a specified amount of content liquid is automatically sucked up from inside the container body 10 to the dropper tube 24. That is, the dropper container 1 has an automatic suction mechanism that can automatically suck up a specified amount of content liquid from inside the container body 10 to the dropper tube 24 simply by rotating the overcap 26 in the loosening direction relative to the container body 10.

In this way, in the dropper container 1 of this embodiment, by rotating the overcap 26 relative to the container body 10 in order to remove the dropper cap 20 from the container body 10, a specified amount of the liquid content can be automatically sucked up into the dropper tube 24. Therefore, the operation of sucking up the liquid content can be easily performed, and the specified amount of the liquid content can be sucked up into the dropper tube 24 with high accuracy.

When the overcap 26 rotates from the first position to the second position relative to the screw cap 21 and the liquid content is sucked up into the dropper tube 24, the engagement projection 27a comes into contact with the stroke end of the spiral groove 27b, restricting further relative rotation of the overcap 26 with respect to the screw cap 21. Therefore, by further rotating the overcap 26 in the loosening direction relative to the container body 10 from the state shown in Figures 5 and 6, the screw cap 21 together with the overcap 26 can be rotated in the loosening direction relative to the container body 10, and the screw cap 21, i.e., the dropper cap 20, can be removed from the mouth 11 or the container body 10.

When the dropper cap 20 is removed from the container body 10, the overcap 26 is in the second position, and as shown in FIG. 9, the pair of pressing parts 25 face the window 26d of the overcap 26 and can be operated from the outside. Therefore, by pointing the dropper tube 24 toward the desired discharge destination and pressing either or both of the pair of pressing parts 25 radially inward, the cylinder chamber 28 can be pressurized through the horizontal hole 22d, and the liquid content inside the dropper tube 24 can be discharged toward the desired discharge destination.

At this time, since the pair of pressing parts 25 are provided on the sides of the dropper cap 20, the pressing parts 25 can be easily pressed with the fingers while holding the overcap 26 in the hand. Therefore, according to the dropper container 1 of this embodiment, the discharge operation of the content liquid can be easily performed.

After discharging the liquid contents, the dropper cap 20 is reattached to the container body 10 and the above procedure is repeated, allowing the specified amount of liquid contents to be accurately discharged again from the dropper tube 24 with a simple operation.

As shown in FIG. 10, after discharging the liquid contents, the liquid contents can be sucked up into the dropper tube 24 by inserting the dropper tube 24 into the inside of the container body 10 from the mouth 11 without reattaching the dropper cap 20 to the container body 10, pushing in the pressing part 25, and then releasing it. In this case, in the dropper container 1 of this embodiment, the conversion mechanism 27 is provided above the screw cap 21, so that the outer diameter of the screw cap 21, i.e., the inner diameter of the mouth 11, can be increased. This allows the dropper tube 24 to be inserted into the inside of the container body 10 through the mouth 11 in a more inclined position, making it easier to suck up the liquid contents from inside the container body 10 with less residual liquid remaining.

The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the invention.

For example, in the above embodiment, the dropper cap 20 is provided with a pair of pressing portions 25 and a pair of inner walls 21e, and the overcap 26 is provided with a pair of windows 26d, but it is sufficient to provide at least one of these.

In addition, in the above embodiment, the engagement protrusion 27a constituting the conversion mechanism 27 is provided on the screw cap 21, and the spiral groove 27b is provided on the piston 23, but the engagement protrusion 27a may be provided on the piston 23, and the spiral groove 27b may be provided on the screw cap 21.

In addition, in the above embodiment, when the overcap 26 is in the first position, the predetermined angle by which the pair of windows 26d are displaced in the direction of tightening the screw relative to the corresponding pressing portion 25 is set to 90 degrees, but this is not limited to this and can be set to any angle as long as the piston 23 can be sufficiently raised by the conversion mechanism 27.

Furthermore, in the above embodiment, the screw cap 21 is provided with an inner wall 21e, but the inner wall 21e may not be provided.

Furthermore, in the above embodiment, the piston 23 is provided with a blocking portion 23g that blocks the communication hole 22b, but the configuration may be such that the blocking portion 23g is not provided.

In addition, in the above embodiment, the conversion mechanism 27 is configured to include an engagement protrusion 27a and a spiral groove 27b, but this is not limited thereto. Any other configuration may be used as long as it can regulate the angular range of the relative rotation of the overcap 26 with respect to the screw cap 21 and convert the rotational displacement of the relative rotation into an upward and downward displacement of the piston 23.

1 Dropper container 10 Container body 11 Mouth portion 12 Body portion 13 Male thread 20 Dropper cap 21 Screw cap 21a Mounting tube 21b Flange portion 21c Female thread 21d Annular protrusion 21e Inner wall 21f Leg portion 22 Cylinder 22a Partition wall 22b Communication hole 22c Retaining tube 22d Horizontal hole 23 Piston 23a Piston guide 23b Piston body 23c Large diameter portion 23d Small diameter portion 23e Slit 23g Blocking portion 23h Guide tube body 24 Dropper tube 24a Fitting tube portion 24b Flange portion 25 Pressing portion 25a Internal space 26 Overcap 26a Circumferential wall 26b Top wall 26c Annular groove 26d Window 27 Conversion mechanism 27a Engagement protrusion 27b Spiral groove 28 Cylinder chamber 29 Mounting portion 29a Annular groove 40, ironing plug 41, cylindrical portion 42, protruding portion 43, anti-rotation mechanism O, axis

Claims (8)

A container body having a cylindrical mouth portion;
a screw cap attached to the mouth portion by a screw connection so as to be freely attached and detached;
A cylinder provided in the screw cap;
a piston that is mounted inside the cylinder and is movable vertically to define a cylinder chamber;
a dropper tube held by the screw cap, the lower end of which is disposed inside the container body and the upper end of which is capable of communicating with the cylinder chamber;
a pressing part formed in an elastically deformable shape having an internal space, the pressing part being airtightly attached to the outside of the cylinder, the internal space of the pressing part being in communication with the cylinder chamber through a horizontal hole provided in the cylinder;
an overcap having a peripheral wall with a window, the overcap being attached to the outside of the screw cap so as to be relatively rotatable about an axis between a first position where the window is offset by a predetermined angle from the pressing portion in the direction of tightening the screw and a second position where the window faces the pressing portion;
a conversion mechanism including a spiral groove provided on either the piston or the screw cap, extending at the specified angle in a reverse screw direction centered on an axis, and an engagement protrusion provided on the other of the piston or the screw cap, movable along the spiral groove. A pair of the pressing portions is provided on both sides of the axis of the cylinder,
2. The dropper container according to claim 1, wherein a pair of the windows are provided on both sides of the axis of the peripheral wall. The dropper container according to claim 1 or 2, wherein the screw cap has an inner wall that faces the window and closes the window when the overcap is in the first position. The predetermined angle is 90 degrees,
The dropper container according to claim 3 , wherein the inner wall is disposed circumferentially offset by 90 degrees from the pressing portion. The dropper container according to any one of claims 1 to 4, wherein the piston has a blocking portion that blocks a communication hole that connects the cylinder chamber and the dropper tube when the overcap is in the first position. The piston is
a piston guide provided with the spiral groove or the engagement protrusion;
6. The dropper container according to claim 1, further comprising: a piston body formed in a circular shape from an elastic body, attached to the piston guide, and in contact with an inner peripheral surface of the cylinder. The piston body has a slit,
7. The dropper container according to claim 6, wherein the piston guide is provided with a protruding rib that engages with the slit to prevent the piston from rotating relative to the piston guide. The dropper container according to any one of claims 1 to 7, wherein the mouth is fitted with a stopper having a cylindrical portion through which the dropper tube is inserted and a spiral convex portion provided on the inner circumferential surface of the cylindrical portion and in contact with the outer circumferential surface of the dropper tube.