JP2023125919A - Syringe container - Google Patents

Abstract

To provide a syringe container with an automatic suction function that allows easy discharge operation of a liquid contained therein.SOLUTION: There is provided a syringe container 1 including: a container body 10; a screw cap 21 attached to a mouth 11; a cylinder 22 provided on the screw cap 21; a piston 23 attached to the cylinder 22; a syringe tube 24 held by the screw cap 21; a pressing part 25 airtightly attached to the outside of the cylinder 22 and having an internal space 25a communicating with a cylinder chamber 28; an overcap 26 having a peripheral wall 26a provided with a window 26d, prevented from rotating by the piston 23, and attached to the outside of the screw cap 21 so as to be relatively rotatable between a first position and a second position; a spiral groove 27b provided in the piston 23 and extending at a predetermined angle in a reverse thread direction; and a conversion mechanism 27 including an engaging protrusion 27a provided on the screw cap 21 and movable along the spiral groove 27b.SELECTED DRAWING: Figure 2

Description

The present invention relates to a dropper container from which a liquid such as a lotion or a medicinal liquid stored in a container body can be taken out using a dropper function.

Conventionally, the above-mentioned dropper container does not require the use of a metal spring, and by removing the cap attached to the mouth of the container body from the mouth, the liquid content can be automatically drawn up into the dropper tube. It has an automatic suction function, and is configured so that after removing the cap from the mouth, the sucked up liquid can be discharged externally from the tip of the dropper tube by pressing the pressing part provided at the upper end of the cap. (For example, see Patent Document 1).

Japanese Patent Application Publication No. 2016-033056

However, in the above-mentioned conventional dropper container, the pressing part is provided at the upper end of the cap, so after removing the cap from the mouth part, it is necessary to press the pressing part with the index finger while holding the cap in your hand, which makes the operation difficult. The problem was that it was difficult.

The present invention has been made in view of such problems, and an object of the present invention is to provide a dropper container with an automatic suction function that allows easy discharging of the liquid contained therein.

The dropper container of the present invention includes a container body having a cylindrical mouth, a screw cap detachably attached to the mouth by screw connection, a cylinder provided on the screw cap, and an interior of the cylinder. a piston that is vertically movably attached to the cylinder chamber and defines a cylinder chamber; a dropper tube that is held by the screw cap and whose lower end is disposed inside the container body and whose upper end communicates with the cylinder chamber; , a pressing part formed in an elastically deformable shape with an internal space and airtightly attached to the outside of the cylinder, and in which the internal space communicates with the cylinder chamber through a horizontal hole provided in the cylinder; and a window. a first position in which the window is prevented from rotating by the piston and is shifted by a predetermined angle in a direction in which the screw is tightened relative to the pressing part; and a second position in which the window faces the pressing part. an overcap mounted on the outside of the screw cap so as to be relatively rotatable about the axis; The present invention is characterized in that it has a conversion mechanism including a helical groove extending at an angle, and an engagement protrusion that is provided on the other of the piston and the screw cap and is movable along the helical groove.

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

In the dropper container of the present invention, in the above configuration, it is preferable that the screw cap includes 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 that the inner wall is disposed offset from the pressing part by 90 degrees in the circumferential direction.

In the dropper container of the present invention, in the above configuration, the piston includes a closing portion that closes a communication hole that communicates the cylinder chamber and the dropper tube when the overcap is in the first position. is preferable.

In the dropper container of the present invention, in the above configuration, the piston is formed into an annular shape by a piston guide provided with the spiral groove or the engagement protrusion, and an elastic body, and is attached to the piston guide so that the piston is attached to the cylinder. It is preferable to have a piston body in contact with the inner circumferential surface.

In the dropper container of the present invention, in the above configuration, the piston main body is provided with a slit, and the piston guide is provided with a convex rib that engages with the slit and prevents the piston from rotating with respect to the piston guide. is preferred.

In the above configuration, the syringe container of the present invention includes a cylindrical portion in which the syringe tube is inserted into the mouth portion, and a spiral portion provided on the inner circumferential surface of the cylindrical portion and in contact with the outer circumferential surface of the syringe tube. It is preferable that an ironing stopper having a convex portion shaped like the above is attached.

According to the present invention, it is possible to provide a dropper container with an automatic suction function that allows easy discharging of the liquid contained therein.

FIG. 1 is a sectional view of a dropper container according to an embodiment of the present invention when viewed from the front. FIG. 2 is a sectional view of the upper half of the dropper container shown in FIG. 1 when viewed from the front. FIG. 2 is a cross-sectional side view of the upper half of the dropper container shown in FIG. 1; 2 is a sectional view taken along line AA in FIG. 1. FIG. FIG. 2 is a cross-sectional view of the dropper container when viewed from the front with the overcap rotated from the first position to the second position. FIG. 3 is a cross-sectional side view of the dropper container with the overcap rotated from the first position to the second position. 6 is a sectional view taken along line BB in FIG. 5. FIG. (a) is a developed view showing details of the engagement state between the spiral groove and the engagement protrusion when the overcap is in the first position, and (b) is a developed view when the overcap is in the second position. FIG. 3 is a developed view showing details of the engagement state between the spiral groove and the engagement protrusion. FIG. 3 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. 6 is a diagram showing a situation in which the content liquid is drawn up from the inside of the container body into the dropper tube with the screw cap removed from the mouth of the container body.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

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

In this specification and claims, the vertical direction refers to the vertical direction when the dropper container 1 is in an upright position as shown in FIG. , and the direction perpendicular to the axis O, and the circumferential direction is the circumferential direction around the axis O.

The container body 10 has a bottle shape with a cylindrical opening 11 centered on the axis O and a body 12 that is integrally connected to the lower end of the opening 11, and can store the liquid inside. I can do it. A male thread 13 is integrally provided on the outer peripheral surface of the mouth portion 11 .

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

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

As shown in FIG. 2, the screw cap 21 includes a cylindrical mounting tube 21a and a flange portion 21b extending radially inward from the upper end of the mounting tube 21a. A female thread 21c is integrally provided on the inner circumferential surface of the mounting tube 21a, and the screw cap 21 is removably attached to the opening 11 by screwing the female thread 21c to the male thread 13.

The cylinder 22 has a cylindrical shape centered on the axis O, and is integrally provided with the screw cap 21 so as to continue above the flange portion 21b. The partition wall 22a on the lower end side of the cylinder 22 is provided with a communication hole 22b that vertically passes through the partition wall 22a. Further, a cylindrical holding tube 22c centered on the axis O is integrally provided on the lower surface of the partition wall 22a on the radially outer side of the communication hole 22b.

The piston 23 is mounted inside the cylinder 22 so as to be movable in the vertical direction, and defines a cylinder chamber 28 between the piston 23 and the cylinder 22 .

In this embodiment, the piston 23 includes 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 continuous below 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, and 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 the outer peripheral portion.

In this embodiment, the piston main body 23b is provided with 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, so that the piston body 23b is provided with a slit 23e. Rotation is prevented in this direction.

Furthermore, in this embodiment, the piston 23 includes a closing portion 23g that projects downward from the lower end of the small diameter portion 23d. The closing portion 23g fits inside the communication hole 22b when the piston 23 is at the lower end position inside the cylinder 22, and closes the communication hole 22b.

The piston guide 23a integrally includes a guide cylinder 23h above the large diameter portion 23c.

The dropper tube 24 has an elongated circular tube shape extending in the vertical direction, and a fitting cylinder part 24a provided at the upper end fits and undercuts the outside of the holding cylinder 22c, and a flange part 24b forms an attachment cylinder. It is held fixed to the screw cap 21 by fitting and undercutting the inside of the screw cap 21a.

As shown in FIG. 1, when the screw cap 21 is attached to the mouth portion 11, the lower end of the dropper tube 24 is located near the bottom of the body portion 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 FIGS. 5 and 6, when the piston 23 moves upward and the closing portion 23g is removed from 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 have a configuration in which a straining stopper 40 is attached to the opening 11 of the container body 10. The ironing stopper 40 is made of an elastic material such as synthetic rubber or elastomer, and includes a cylindrical part 41 through which the dropper tube 24 is inserted, and a spiral convexity integrally provided on the inner peripheral surface of the cylindrical part 41. 42. The convex portion 42 is in contact with the outer circumferential surface of the dropper tube 24 while being elastically deformed radially outward.

By attaching such a squeezing stopper 40 to the mouth portion 11, when the dropper cap 20 is removed from the container body 10, the content liquid adhering to the outer surface of the dropper tube 24 can be squeezed out by the convex portion 42. When the dropper cap 20 is removed from the container body 10, it is possible to suppress the content liquid from dripping to the outside.

Further, by forming the convex portion 42 in a spiral shape, the content liquid squeezed from the outer surface of the dropper tube 24 by the convex portion 42 flows down toward the inside of the container body 10 along the spiral convex portion 42. This can prevent the liquid remaining in the convex portion 42 from scattering when the dropper tube 24 is inserted into and taken out from the mouth portion 11.

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

These pair of pressing parts 25 each have an internal space 25a and are formed in a dome shape that can be elastically deformed in the radial direction, and are airtightly attached to the outside of the cylinder 22. More specifically, as shown in FIGS. 2 and 4, annular mounting portions 29 are integrally provided on both outer sides of the cylinder 22 across the axis O, and the pair of pressing portions 25 are By fitting the peripheral edge portions into the annular grooves 29a provided in the corresponding mounting portions 29, the mounting portions 29 are airtightly (and liquid-tightly) mounted.

Further, the cylinder 22 is provided with a pair of horizontal holes 22d on both sides of the axis O, and the internal space 25a of each pressing portion 25 communicates with the cylinder chamber 28 through the corresponding horizontal hole 22d. . Therefore, when the pair of pressing portions 25 are pushed radially inward and elastically deformed, the pressure inside the cylinder chamber 28 is increased, and the liquid inside the dropper tube 24 is discharged to the outside from its lower end. become.

In addition, in the state shown in FIG. 2, each horizontal hole 22d is closed by the piston body 23b.

As shown in FIG. 2, the overcap 26 has a cylindrical shape having a cylindrical peripheral wall 26a centered on the axis O and a top wall 26b. It covers the cap 21, cylinder 22, piston 23, and pressing part 25. An annular groove 26c is provided on the inner circumferential surface of the lower end of the peripheral wall 26a, and an annular protrusion 21d provided on the outer circumferential surface of the lower end of the mounting tube 21a of the screw cap 21 engages with this annular groove 26c. 26 is secured against the screw cap 21.

As shown in FIGS. 3 and 4, a window 26d is provided in the peripheral wall 26a. In this embodiment, a pair of windows 26d corresponding to the pair of pressing portions 25 are provided on both sides of the peripheral wall 26a with the axis O interposed therebetween. Each window 26d is large enough to allow the pressing part 25 to be pushed radially inward from the outside of the overcap 26 with a finger when the window 26d faces the pressing part 25.

The overcap 26 has a first position (the position shown in FIGS. 2, 3, and 4) in which the pair of windows 26d is shifted by a predetermined angle in the direction of tightening the screw with respect to the corresponding pressing part 25, and the pair of windows 26d correspond to each other. It is rotatable relative to the screw cap 21 about the axis O between a second position (the position shown in FIGS. 5, 6, and 7) facing the pressing portion 25 that presses the screw cap 21. In this embodiment, as shown in FIG. 4, when the overcap 26 is in the first position, the predetermined angle at which the pair of windows 26d is deviated from the corresponding pressing part 25 in the direction of tightening the screw is 90 degrees. . That is, when the overcap 26 is in the first position, the pair of pressing parts 25 are covered by the peripheral wall 26a of the overcap 26, as shown in FIGS. 2 and 4, and the overcap 26 is held against the screw cap 21. When the overcap 26 is rotated to the second position, as shown in FIGS. 5 and 7, the pair of pressing portions 25 each face the window 26d, and can be pressed from outside the overcap 26 through the window 26d. becomes.

As shown in FIGS. 3 and 4, the screw cap 21 can also be configured to include an inner wall 21e. In this embodiment, a pair of inner walls 21e corresponding to a 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 by 90 degrees in the circumferential direction with respect to the pressing portion 25. Each inner wall 21e is formed in an arc shape with a larger circumferential width and vertical dimension than the window 26d.

As shown in FIGS. 3 and 4, when the overcap 26 is in the first position, each inner wall 21e faces the corresponding window 26d from the inside in the radial direction and closes the window 26d. In this way, when the overcap 26 is in the first position, the pair of pressing parts 25 are covered by the peripheral wall 26a, the pair of windows 26d are closed by the inner wall 21e, and the pressing parts 25 are visible through the window 26d. This prevents the appearance of the dropper cap 20 from being damaged.

The overcap 26 is prevented from rotating relative to the piston 23. That is, as shown in FIG. 2, a detent mechanism 43 is provided between the inner circumferential surface of the peripheral wall 26a of the overcap 26 at a portion above the window 26d and the upper end portion of the guide cylinder 23h of the piston 23. It is provided. The anti-rotation mechanism 43 includes, for example, a structure in which a spline extending vertically on the inner circumferential surface of the peripheral wall 26a and a spline extending vertically on the outer circumferential surface of the guide cylinder 23h are engaged with each other. , various configurations can be adopted. By providing the anti-rotation mechanism 43, when the overcap 26 rotates relative to the screw cap 21 in the circumferential direction, the piston 23 along with the overcap 26 also rotates relative to the screw cap 21 in the circumferential direction.

As shown in FIG. 2, the conversion mechanism 27 is provided between the screw cap 21 and the piston 23. Specifically, a pair of leg portions 21f are integrally provided at the upper end of the cylinder 22 symmetrically with respect to the axis O, and an engaging protrusion 27a protrudes radially outward from the pair of leg portions 21f. is provided. On the other hand, the guide cylinder 23h of the piston 23 is provided with a pair of helical grooves 27b extending at a predetermined angle, that is, in an angular range of 90 degrees, in a reverse thread direction centered on the axis O, and engaged with the pair of helical grooves 27b. The conversion mechanism 27 is configured by engaging the mating protrusion 27a so as to be movable along the spiral groove 27b.

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

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

Further, when the overcap 26 rotates together with the piston 23 with respect to the screw cap 21 from the first position to the second position, the engagement protrusion 27a moves along the spiral groove 27b, causing the rotational displacement to shift upward. is converted to As a result, when the overcap 26 rotates with the piston 23 relative to the screw cap 21 from the first position to the second position, the piston 23 moves from the position shown in FIGS. 2 and 3 to the position shown in FIGS. 5 and 6. move upwards until. When the piston 23 moves upward, the cylinder chamber 28 expands and the inside becomes negative pressure, and the closing portion 23g separates from the communication hole 22b, so that the cylinder chamber 28 communicates with the internal flow path of the dropper tube 24.

Next, the operation of the dropper container 1 having the above configuration will be explained.

When not in use or before use, the dropper container 1 is in a state where the overcap 26 is in the first position, as shown in FIG. Thereby, as described above, the pair of pressing portions 25 are covered by the peripheral wall 26a, and the pair of windows 26d are prevented from being blocked by the inner wall 21e, thereby preventing the appearance of the dropper cap 20 from being impaired. Further, since the piston 23 is at the lower end position, the communication hole 22b is closed by the closing portion 23g, and leakage of the content liquid to the inside or outside of the overcap 26 via the cylinder 22 is effectively prevented.

When discharging the content liquid, from the state shown in FIG. 2, the overcap 26 is rotated in a loosening direction with respect to the container body 10, and the dropper cap 20 is removed from the mouth portion 11.

Here, when the overcap 26 is rotated in the direction of loosening with respect to the container body 10 from the state shown in FIG. On the other hand, there is a relative rotation from the first position to the second position, that is, idling. When the overcap 26 rotates relative to the screw cap 21 from the first position to the second position, the conversion mechanism 27 moves the piston 23 from the position shown in FIGS. 2 and 3 to the position shown in FIGS. 5 and 6. The cylinder chamber 28 expands and the inside becomes negative pressure, and the closing portion 23g separates from the communication hole 22b, so that the cylinder chamber 28 communicates with the internal flow path of the dropper tube 24. As a result, a specified amount of the liquid content is automatically sucked up into the dropper tube 24 from inside the container body 10. That is, the dropper container 1 is an automatic suction device that can automatically draw up a specified amount of liquid from inside the container body 10 into the dropper tube 24 by simply rotating the overcap 26 in the loosening direction with respect to the container body 10. It has a mechanism.

As described above, in the dropper container 1 of the present 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 prescribed amount of the content liquid can be automatically poured into the dropper tube 24. can be sucked up. Therefore, the liquid content can be easily sucked up, and a prescribed amount of the liquid content can be sucked into the dropper tube 24 with high precision.

When the overcap 26 rotates relative to the screw cap 21 from the first position to the second position and the liquid content is sucked up into the dropper tube 24, the engaging protrusion 27a abuts against the stroke end of the spiral groove 27b and the overcap 26 rotates relative to the screw cap 21 from the first position to the second position. Further relative rotation of the cap 26 with respect to the screw cap 21 is restricted. Therefore, by further rotating the overcap 26 in the loosening direction with respect to the container body 10 from the state shown in FIGS. 5 and 6, the screw cap 21 is rotated together with the overcap 26 in the loosening direction with respect to the container body 10. Then, the screw cap 21 or 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, so as shown in FIG. It is ready for operation. Therefore, by orienting the dropper tube 24 toward a desired discharge destination and pushing both or one of the pair of pressing portions 25 radially inward, the cylinder chamber 28 is pressurized through the horizontal hole 22d, and the dropper tube 24 The liquid inside can be discharged toward a 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 fingers while holding the overcap 26 in the hand. Therefore, according to the dropper container 1 of this embodiment, the operation of discharging the content liquid can be easily performed.

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

As shown in FIG. 10, after discharging the content liquid, the dropper tube 24 was inserted into the container body 10 from the opening 11 without attaching the dropper cap 20 to the container body 10 again, and the pressing part 25 was pushed. After that, by opening the dropper tube 24, the liquid content can be sucked up into the dropper tube 24. At this time, in the dropper container 1 of this embodiment, since the conversion mechanism 27 is provided above the screw cap 21, the outer diameter of the screw cap 21, that is, the inner diameter of the opening 11 can be increased. As a result, the dropper tube 24 can be inserted into the container body 10 through the opening 11 in a more inclined posture, and the content liquid can be sucked up from the inside of the container body 10 more easily and with a smaller amount remaining. can.

The present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof.

For example, in the embodiment, the dropper cap 20 is provided with a pair of pressing parts 25 and a pair of inner walls 21e, and the overcap 26 is provided with a pair of windows 26d. good.

Furthermore, in the embodiment described above, the engagement protrusion 27a constituting the conversion mechanism 27 is provided on the screw cap 21, and the helical groove 27b is provided on the piston 23. 27b may be provided on the screw cap 21.

Further, in the above embodiment, when the overcap 26 is in the first position, the predetermined angle at which the pair of windows 26d is deviated from the corresponding pressing part 25 in the direction of tightening the screws is 90 degrees, but the angle is not limited to this. First, the angle can be set to any angle that allows the conversion mechanism 27 to raise the piston 23 sufficiently.

Furthermore, in the embodiment described above, the screw cap 21 is provided with the inner wall 21e, but a configuration may be adopted in which the inner wall 21e is not provided.

Furthermore, in the embodiment described above, the piston 23 is provided with the closing portion 23g that closes the communication hole 22b, but a configuration may be adopted in which the closing portion 23g is not provided.

Further, in the embodiment, the conversion mechanism 27 is configured to include the engagement protrusion 27a and the spiral groove 27b, but the configuration is not limited to this, and the angular range of relative rotation of the overcap 26 with respect to the screw cap 21 is restricted. Other configurations may be used as long as the rotational displacement of the relative rotation can be converted into vertical displacement of the piston 23.

1 Dropper container 10 Container body 11 Mouth part 12 Body part 13 Male screw 20 Dropper cap 21 Screw cap 21a Mounting cylinder 21b Flange part 21c Female screw 21d Annular projection 21e Inner wall 21f Leg part 22 Cylinder 22a Partition wall 22b Communication hole 22c Holding cylinder 22d Horizontal hole 23 Piston 23a Piston guide 23b Piston body 23c Large diameter part 23d Small diameter part 23e Slit 23g Closing part 23h Guide cylinder 24 Dropper tube 24a Fitting cylinder part 24b Flange part 25 Pressing part 25a Internal space 26 Overcap 26a Peripheral wall 26b Top wall 26c Annular Groove 26d Window 27 Conversion mechanism 27a Engaging protrusion 27b Spiral groove 28 Cylinder chamber 29 Mounting part 29a Annular groove 40 Ironing plug 41 Cylindrical part 42 Convex part 43 Stopping mechanism O Axis

Claims (8)

a container body with a cylindrical mouth;
a screw cap detachably attached to the mouth portion by screw connection;
a cylinder provided in the screw cap;
a piston that is vertically movably mounted inside the cylinder and defines a cylinder chamber;
a dropper tube held by the screw cap, with a lower end disposed inside the container body and an upper end capable of communicating with the cylinder chamber;
a pressing portion formed into an elastically deformable shape with an internal space, airtightly attached to the outside of the cylinder, and with the internal space communicating with the cylinder chamber through a horizontal hole provided in the cylinder;
a first position in which the peripheral wall is provided with a window and is prevented from rotating by the piston and is shifted by a predetermined angle in a direction in which the screw is tightened relative to the pressing part; and a second position in which the window faces the pressing part; an overcap attached to the outside of the screw cap so as to be relatively rotatable about the axis between the overcap and the screw cap;
a spiral groove provided on either one of the piston and the screw cap and extending at the predetermined angle in a reverse screw direction centered on the axis; and a spiral groove provided on the other of the piston or the screw cap and extending in the spiral groove A syringe container comprising: a conversion mechanism having an engagement protrusion that is movable along the conversion mechanism. A pair of the pressing parts are provided on both sides of the axis of the cylinder,
The dropper container according to claim 1, wherein the pair of windows are provided on both sides of the peripheral wall with respect to the axis thereof. 3. The dropper container of claim 1 or 2, wherein the screw cap comprises an inner wall opposite the window and closing 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 arranged circumferentially offset by 90 degrees with respect to the pressing portion. Any one of claims 1 to 4, wherein the piston includes a closing portion that closes a communication hole that communicates the cylinder chamber and the dropper tube when the overcap is in the first position. The dropper container described in. The piston is
a piston guide provided with the spiral groove or the engagement protrusion;
The dropper container according to any one of claims 1 to 5, comprising a piston body formed in an annular shape of an elastic body, attached to the piston guide and in contact with the inner circumferential surface of the cylinder. the piston body includes a slit;
The dropper container according to claim 6, wherein the piston guide includes a convex rib that engages with the slit and prevents the piston from rotating relative to the piston guide. An ironing stopper is provided in the mouth portion, and includes a cylindrical portion through which the syringe tube is inserted, and a spiral convex portion provided on an inner circumferential surface of the cylindrical portion and in contact with an outer circumferential surface of the syringe tube. The dropper container according to any one of claims 1 to 7, which is attached to the dropper container.