Syringe container

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

Technical Field

[0001] The present invention relates to a dropper container capable of taking out a content liquid such as lotion or chemical liquid stored in a container body by a dropper function.

Background Art

[0002] Conventionally, as such a dropper container, without using a metal spring, an automatic suction function is provided that can automatically suck the content liquid into the dropper tube by removing the cap attached to the mouth of the container body from the mouth, and after removing the cap from the mouth, the content liquid sucked up can be discharged to the outside from the tip of the dropper tube by pressing a pressing portion provided at the upper end of the cap. There is known a configuration that can be used (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above conventional dropper container, since the pressing portion is provided at the upper end of the cap, after removing the cap from the mouth, it is necessary to press the pressing portion with the index finger while holding the cap by hand, and there is a problem that the operation is difficult.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a dropper container with an automatic suction function that can easily perform a discharge operation of a content liquid.

Means for Solving the Problems

[0006] The dropper container of the present invention includes a container body having a cylindrical mouth portion, a screw cap detachably attached to the mouth portion by screw connection, a cylinder provided on the screw cap, a piston movably mounted vertically inside the cylinder to partition a cylinder chamber, a dropper tube held by the screw cap with its lower end disposed inside the container body and communicable with the cylinder chamber at its upper end, a pressing portion formed in an elastically deformable shape with an internal space, airtightly mounted outside the cylinder and having the internal space communicating with the cylinder chamber through a lateral hole provided in the cylinder, an overcap mounted outside the screw cap rotatable relative to the screw cap about an axis between a first position where a circumferential wall provided with a window is non-rotatably fixed to the piston and the window is displaced by a predetermined angle in a direction of tightening a screw with respect to the pressing portion and a second position where the window faces the pressing portion, a conversion mechanism including 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 about the axis, and an engaging protrusion provided on the other of the piston and the screw cap and movable along the spiral groove.

[0007] In the dropper container of the present invention having the above configuration, it is preferable that a pair of the pressing portions are provided on both sides sandwiching the axis of the cylinder, and a pair of the windows are provided on both sides sandwiching the axis of the circumferential wall.

[0008] In the dropper container of the present invention having the above configuration, it is preferable that the screw cap includes an inner wall that closes the window by facing the window when the overcap is in the first position.

[0009] In the dropper container of the present invention having the above configuration, it is preferable that the predetermined angle is 90 degrees and the inner wall is displaced by 90 degrees in the circumferential direction with respect to the pressing portion.

[0010] In the above configuration, the pipette container of the present invention preferably includes a closing portion for closing a communication hole that communicates the cylinder chamber and the pipette tube when the piston is in the first position with the overcap.

[0011] In the above configuration, the pipette container of the present invention preferably has a piston guide provided with the spiral groove or the engaging protrusion, and a piston body formed in an annular shape by an elastic body and attached to the piston guide to contact the inner peripheral surface of the cylinder.

[0012] In the above configuration, the pipette container of the present invention preferably has a piston body provided with a slit, and the piston guide is provided with a convex rib that engages with the slit to prevent the piston from rotating relative to the piston guide.

[0013] In the above configuration, the pipette container of the present invention preferably has a squeezing stopper attached to the mouth portion, the squeezing stopper including a cylindrical portion through which the pipette tube is inserted and a spiral convex portion provided on the inner peripheral surface of the cylindrical portion and contacting the outer peripheral surface of the pipette tube.

Advantages of the Invention

[0014] According to the present invention, it is possible to provide a pipette container with an automatic suction function that can easily perform a discharging operation of the content liquid.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Best Mode for Carrying Out the Invention

[0016] Hereinafter, the present invention will be more specifically illustrated and described with reference to the drawings.

[0017] As shown in FIG. 1, the dropper container 1 according to an embodiment of the present invention has an automatic suction function and includes a container body 10 and a dropper cap 20. FIG. 1 shows a state where the dropper cap 20 is attached to the container body 10.

[0018] In the present specification and claims, the vertical direction means the vertical direction in a state where the dropper container 1 is in an upright posture as shown in FIG. 1, the radial direction means a direction passing through the axis O of the container body 10 and perpendicular to the axis O, and the circumferential direction means a circumferential direction centered on the axis O.

[0019] The container body 10 has a bottle shape including a cylindrical mouth portion 11 centered on the axis O and a body portion 12 integrally connected to the lower end of the mouth portion 11, and can store the content liquid inside. A male screw 13 is integrally provided on the outer peripheral surface of the mouth portion 11.

[0020] 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.

[0021] The dropper cap 20 includes a screw cap 21, a cylinder 22, a piston 23, a dropper tube 24, a pressing portion 25, an over cap 26, and a conversion mechanism 27.

[0022] As shown in FIG. 2, the screw cap 21 includes a cylindrical mounting cylinder 21a and a flange portion 21b extending radially inward from the upper end of the mounting cylinder 21a. A female screw 21c is integrally provided on the inner peripheral surface of the mounting cylinder 21a, and the screw cap 21 is detachably mounted on the mouth portion 11 by screwing the female screw 21c onto the male screw 13.

[0023] The cylinder 22 has a cylindrical shape centered on the axis O and is integrally provided on the screw cap 21 connected to the upper side of the flange portion 21b. A communication hole 22b penetrating the partition wall 22a in the vertical direction is provided in the partition wall 22a on the lower end side of the cylinder 22. Further, a cylindrical holding cylinder 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.

[0024] The piston 23 is movably mounted vertically inside the cylinder 22 and partitions a cylinder chamber 28 between the piston 23 and the cylinder 22.

[0025] 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 side of the large-diameter portion 23c, and the large-diameter portion 23c is supported by the inner peripheral surface of the cylinder 22. The piston body 23b is formed in an annular shape by 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 the outer peripheral portion.

[0026] In this embodiment, the piston 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, thereby preventing the piston 23 from rotating in the circumferential direction with respect to the piston guide 23a.

[0027] Furthermore, in this embodiment, the piston 23 is provided with a closing portion 23g that protrudes 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.

[0028] The piston guide 23a integrally includes a guide cylinder body 23h above the large-diameter portion 23c.

[0029] The dropper tube 24 is an elongated circular tube extending in the vertical direction. The fitting cylinder portion 24a provided at the upper end portion fits and undercuts on the outside of the holding cylinder 22c, and the flange portion 24b fits and undercuts on the inside of the mounting cylinder 21a, so that it is held in a fixed state to the screw cap 21.

[0030] As shown in FIG. 1, in a state where the screw cap 21 is attached to the mouth portion 11, the lower end of the dropper tube 24 is disposed near the bottom of the body portion 12 inside the container body 10.

[0031] On the one 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 disengages from the communication hole 22b, the dropper tube 24 communicates with the cylinder chamber 28 through the communication hole 22b.

[0032] As shown in FIG. 2, the dropper container 1 can also be configured such that a squeegee plug 40 is attached to the mouth portion 11 of the container body 10. The squeegee plug 40 is formed of an elastic body 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 of being elastically deformed radially outward.

[0033] When such a squeegee plug 40 is attached 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 is squeegeed off by the convex portion 42, and it is possible to suppress the content liquid from dripping outside when the dropper cap 20 is removed from the container body 10.

[0034] Further, by making the convex portion 42 spiral, the content liquid squeegeed off from the outer surface of the dropper tube 24 by the convex portion 42 flows down along the spiral convex portion 42 toward the inside of the container body 10, and it is possible to prevent the content liquid remaining on the convex portion 42 from scattering when the dropper tube 24 is inserted into and removed from the mouth portion 11.

[0035] In the present embodiment, the pressing portions 25 are provided on both sides sandwiching the axis O of the cylinder 22, respectively.

[0036] These pair of pressing parts 25 each have an internal space 25a and are formed in a dome shape that can be elastically deformed radially, and are airtightly attached to the outside of the cylinder 22. More specifically, as shown in FIGS. 2 and 4, annular mounting parts 29 are integrally provided on both outer sides sandwiching the axis O of the cylinder 22. The pair of pressing parts 25 are airtightly (and liquid-tightly) attached to the corresponding mounting parts 29 by fitting the peripheral edges into the annular grooves 29a provided in the corresponding mounting parts 29.

[0037] Also, the cylinder 22 is provided with a pair of lateral holes 22d on both sides sandwiching the axis O, and the internal space 25a of each pressing part 25 communicates with the cylinder chamber 28 through the corresponding lateral hole 22d. Therefore, when the pair of pressing parts 25 are pushed radially inward and elastically deformed, the pressure inside the cylinder chamber 28 is increased, and the content liquid inside the nozzle tube 24 is discharged to the outside from its lower end.

[0038] In addition, in the state shown in FIG. 2, each lateral hole 22d is blocked by the piston body 23b.

[0039] As shown in FIG. 2, the overcap 26 has a top cylindrical shape including 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 part 25. An annular groove 26c is provided on the inner peripheral surface of the lower end side of the peripheral wall 26a, and the overcap 26 is prevented from coming off the screw cap 21 by engaging an annular protrusion 21d provided on the outer peripheral surface of the lower end side of the mounting cylinder 21a of the screw cap 21 with this annular groove 26c.

[0040] As shown in FIGS. 3 and 4, the peripheral wall 26a is provided with windows 26d. In this embodiment, a pair of windows 26d corresponding to the pair of pressing parts 25 are provided on both sides sandwiching the axis O of the peripheral wall 26a. Each window 26d is sized such that when the window 26d faces the pressing part 25, the pressing part 25 can be pushed radially inward with a finger from the outside of the overcap 26.

[0041] The over cap 26 is rotatable relative to the screw cap 21 about the axis O between a first position (the position shown in FIGS. 2, 3, and 4) where the pair of windows 26d are displaced by a predetermined angle in the direction of tightening the screw with respect to the corresponding pressing portions 25, and a second position (the position shown in FIGS. 5, 6, and 7) where the pair of windows 26d face the corresponding pressing portions 25. In the present embodiment, as shown in FIG. 4, when the over cap 26 is in the first position, the predetermined angle of displacement in the direction of tightening the screw with respect to the corresponding pressing portions 25 for the pair of windows 26d is 90 degrees. That is, when the over cap 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 over cap 26. When the over cap 26 rotates to the second position with respect to the screw cap 21, as shown in FIGS. 5 and 7, the pair of pressing portions 25 face the windows 26d respectively, and a pushing operation can be performed from the outside of the over cap 26 through the windows 26d.

[0042] As shown in FIGS. 3 and 4, the screw cap 21 can also be configured to include an inner wall 21e. In the present embodiment, at the upper end of the mounting cylinder 21a of the screw cap 21, a pair of inner walls 21e corresponding to the pair of windows 26d are provided with a 90-degree displacement in the circumferential direction with respect to the pressing portions 25 respectively. Each inner wall 21e is formed in an arc shape having a larger circumferential width and vertical dimension than the window 26d.

[0043] As shown in FIGS. 3 and 4, when the over cap 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 over cap 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 walls 21e, preventing the appearance of the syringe cap 20 from being damaged, such as by the pressing portions 25 being visible through the windows 26d.

[0044] The overcap 26 is non-rotatable relative 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 upper side portion of the window 26d of the peripheral wall 26a of the overcap 26 and the upper end portion of the guide cylinder 23h of the piston 23. As the rotation prevention mechanism 43, for example, various configurations can be adopted, such as a configuration in which a spline provided to extend in the vertical direction on the inner peripheral surface of the peripheral wall 26a is engaged with a spline provided to extend 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 relative to the screw cap 21 in the circumferential direction, the piston 23 also rotates relative to the screw cap 21 in the circumferential direction together with the overcap 26.

[0045] 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 symmetrical with respect to the axis O are integrally provided at the upper end of the cylinder 22, and engagement protrusions 27a protruding radially outward from the pair of leg portions 21f are provided. On the other hand, a pair of spiral grooves 27b extending in a reverse screw direction, that is, in an angular range of a predetermined angle, that is, 90 degrees, about the axis O are provided on the guide cylinder 23h of the piston 23. The conversion mechanism 27 is configured by the engagement protrusions 27a being movably engaged with the pair of spiral grooves 27b along the spiral grooves 27b.

[0046] When the overcap 26 non-rotatable 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. By the engagement protrusion 27a abutting against the upper stroke end of the spiral groove 27b, the rotation of the overcap 26 in the direction of tightening the screw from the first position with respect to the screw cap 21 is restricted.

[0047] On the other hand, when the over cap 26 rotates together with the piston 23 in the direction of loosening the screw with respect to the screw cap 21 from the first position to reach the second position, as shown in FIG. 8(b), the engaging projection 27a moves along the spiral groove 27b and is positioned at the stroke end on the lower side of the spiral groove 27b. When the engaging projection 27a abuts against the stroke end on the lower side of the spiral groove 27b, the rotation of the over cap 26 in the direction of further loosening the screw with respect to the screw cap 21 from the second position is restricted.

[0048] Further, when the over cap 26 rotates together with the piston 23 from the first position to the second position with respect to the screw cap 21, the rotational displacement is converted into an upward displacement as the engaging projection 27a moves along the spiral groove 27b. As a result, when the over cap 26 rotates together with the piston 23 from the first position to the second position with respect to the screw cap 21, the piston 23 moves upward from the positions shown in FIGS. 2 and 3 to the positions shown in FIGS. 5 and 6. When the piston 23 moves upward, the cylinder chamber 28 expands and the inside becomes a negative pressure, and the closing portion 23g disengages from the communication hole 22b, and the cylinder chamber 28 communicates with the internal flow path of the spout tube 24.

[0049] Next, the operation of the spout container 1 having the above configuration will be described.

[0050] In a state when not in use or before use, as shown in FIG. 2, the over cap 26 of the spout container 1 is in the first position. 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 closed by the inner wall 21e, preventing the appearance of the spout cap 20 from being damaged. Further, since the piston 23 is at the lower end position, the communication hole 22b is closed by the closing portion 23g, effectively preventing the leakage of the content liquid to the inside or outside of the over cap 26 through the cylinder 22.

[0051] When discharging the content liquid, from the state shown in FIG. 2, the over cap 26 is rotated in the loosening direction with respect to the container body 10 to remove the spout cap 20 from the mouth portion 11.

[0052] Here, when the overcap 26 is rotated in the loosening direction with respect to the container body 10 from the state shown in FIG. 2, the screw cap 21 does not rotate with respect to the mouth portion 11, and the overcap 26 relatively rotates, i.e., idles, from the first position to the second position with respect to the screw cap 21. When the overcap 26 relatively rotates from the first position to the second position with respect to the screw cap 21, the piston 23 rises from the positions shown in FIGS. 2 and 3 to the positions shown in FIGS. 5 and 6 due to the action of the conversion mechanism 27, the cylinder chamber 28 expands and the inside becomes negative pressure, and the closing portion 23g disengages from the communication hole 22b and the cylinder chamber 28 communicates with the internal flow path of the spout tube 24. As a result, a specified amount of the content liquid is automatically sucked up from the inside of the container body 10 into the spout tube 24. That is, the spout container 1 has an automatic suction mechanism that can automatically suck up a specified amount of the content liquid from the inside of the container body 10 into the spout tube 24 by simply rotating the overcap 26 in the loosening direction with respect to the container body 10.

[0053] Thus, in the spout container 1 of the present embodiment, by rotating the overcap 26 with respect to the container body 10 in order to remove the spout cap 20 from the container body 10, a specified amount of the content liquid can be automatically sucked up into the spout tube 24. Therefore, the operation of sucking up the content liquid can be easily performed, and a specified amount of the content liquid can be accurately sucked up into the spout tube 24.

[0054] When the overcap 26 relatively rotates from the first position to the second position with respect to the screw cap 21 and the content liquid is sucked up into the spout tube 24, the engaging projection 27a abuts against the stroke end of the spiral groove 27b and further relative rotation of the overcap 26 with respect to the screw cap 21 is restricted. Therefore, from the state shown in FIGS. 5 and 6, by further rotating the overcap 26 in the loosening direction with respect to the container body 10, the screw cap 21, together with the overcap 26, is rotated in the loosening direction with respect to the container body 10, and the screw cap 21, i.e., the spout cap 20, can be removed from the mouth portion 11 or the container body 10.

[0055] Since the overcap 26 of the spatula cap 20 removed from the container body 10 is in the second position, as shown in FIG. 9, the pair of pressing portions 25 face the window 26d of the overcap 26 and are in a state where they can be operated from the outside. Therefore, by aiming the spatula tube 24 at a desired discharge destination and pressing both or either one of the pair of pressing portions 25 inward in the radial direction, the cylinder chamber 28 is pressurized through the lateral hole 22d, and the content liquid inside the spatula tube 24 can be discharged toward the desired discharge destination.

[0056] At this time, since the pair of pressing portions 25 are provided on the side portion of the spatula cap 20, the pressing portions 25 can be easily pressed with fingers while holding the overcap 26 by hand. Therefore, according to the spatula container 1 of the present embodiment, the discharge operation of the content liquid can be easily performed.

[0057] After discharging the content liquid, by attaching the spatula cap 20 to the container body 10 again and repeating the above procedure, a specified amount of the content liquid can be accurately discharged from the spatula tube 24 again with a simple operation.

[0058] As shown in FIG. 10, after discharging the content liquid, without attaching the spatula cap 20 to the container body 10 again, the spatula tube 24 is inserted into the container body 10 from the mouth portion 11, and after pressing the pressing portion 25 and then releasing it, the content liquid can also be sucked up into the spatula tube 24. At this time, in the spatula container 1 of the present 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 mouth portion 11 can be increased. Thereby, the spatula tube 24 can be inserted through the mouth portion 11 into the container body 10 in a more inclined posture, and the content liquid can be more easily sucked up from the inside of the container body 10 with less remaining amount.

[0059] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

[0060] For example, in the above-described embodiment, the pipette 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. However, at least one of these may be provided.

[0061] Also, in the above-described embodiment, the engaging 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. However, the engaging protrusion 27a may be provided on the piston 23, and the spiral groove 27b may be provided on the screw cap 21.

[0062] Furthermore, in the above-described 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 with respect to the corresponding pressing portions 25 is set to 90 degrees. However, it is not limited thereto, and any angle can be set as long as the piston 23 can be sufficiently lifted by the conversion mechanism 27.

[0063] Furthermore, in the above-described embodiment, the inner wall 21e is provided on the screw cap 21. However, a configuration in which the inner wall 21e is not provided may also be adopted.

[0064] Furthermore, in the above-described embodiment, the piston 23 is provided with a closing portion 23g for closing the communication hole 22b. However, a configuration in which the closing portion 23g is not provided may also be adopted.

[0065] Furthermore, in the above-described embodiment, the conversion mechanism 27 is configured to include an engaging protrusion 27a and a spiral groove 27b. However, it is not limited thereto, and any other configuration may be adopted 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 can convert the rotational displacement of the relative rotation into the vertical displacement of the piston 23.

Explanation of Reference Numerals

[0066] 1 Pipette container 10 Container body 11 Mouth portion 12 Barrel portion 13 male screw 20 syringe cap 21 screw cap 21a mounting cylinder 21b flange portion 21c female screw 21d annular projection 21e inner wall 21f leg portion 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 portion 23d small diameter portion 23e slit 23g closing portion 23h guide cylinder body 24 syringe tube 24a fitting cylinder portion 24b flange portion 25 pressing portion 25a internal space 26 over cap 26a peripheral wall 26b top wall 26c annular groove 26d window 27 conversion mechanism 27a engaging projection 27b spiral groove 28 cylinder chamber 29 mounting portion 29a annular groove 40 squeegee plug 41 cylindrical portion 42 convex portion 43 anti-rotation mechanism O axis

Claims

1. A container body having a cylindrical mouth portion, A screw cap detachably attached to the mouth portion by screw connection, A cylinder provided on the screw cap, A piston movably mounted vertically inside the cylinder to partition a cylinder chamber, A spout tube held by the screw cap, with its lower end disposed inside the container body and its upper end communicable with the cylinder chamber, An elastic deformable shape having an internal space, hermetically attached to the outside of the cylinder, and a pressing portion whose internal space communicates with the cylinder chamber through a lateral hole provided in the cylinder, An overcap having a peripheral wall provided with a window, rotatably mounted outside the screw cap about an axis between a first position where the window is locked to the piston and the window is displaced by a predetermined angle in the direction of tightening a screw with respect to the pressing portion and a second position where the window faces the pressing portion, A conversion mechanism provided on either one of the piston and the screw cap, having a spiral groove extending at the predetermined angle in the reverse screw direction about the axis, and an engaging protrusion provided on the other of the piston and the screw cap and movable along the spiral groove. A spout container characterized by having the same.

2. A pair of the pressing portions are provided on both sides sandwiching the axis of the cylinder, A pair of the windows are provided on both sides sandwiching the axis of the peripheral wall. The spout container according to claim 1.

3. The screw cap has an inner wall that closes the window facing the window when the overcap is in the first position. The spout container according to claim 1 or 2.

4. The predetermined angle is 90 degrees, The inner wall is disposed circumferentially displaced by 90 degrees with respect to the pressing portion. The spout container according to claim 3.

5. The syringe container according to 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 spout tube when the overcap is in the first position.

6. The piston is a piston guide provided with the spiral groove or the engaging projection, and a piston body formed in an annular shape by an elastic body and attached to the piston guide and contacting the inner peripheral surface of the cylinder. The syringe container according to any one of claims 1 to 5.

7. The piston body includes a slit, and the piston guide includes a convex rib that engages with the slit to prevent the piston from rotating relative to the piston guide. The syringe container according to claim 6.

8. The syringe container according to any one of claims 1 to 7, wherein a squeezing stopper provided with a cylindrical portion through which the spout tube is inserted and a spiral convex portion provided on the inner peripheral surface of the cylindrical portion and contacting the outer peripheral surface of the spout tube is attached to the mouth portion.

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