JPH10297661A - Cap for measuring constant quantity of liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cap which can reliably measure and eject liquid contents wherein operation thereof is simple, the number of components is small and manufacture is easy. SOLUTION: The cap comprises a measuring chamber cylinder 3 having a liquid inlet 11 toward the inside of a bottle in a center axis direction, having a liquid flow-out opening 12 toward the outside of the bottle and fixed to a bottle nozzle, a piston 10 having two piston plates 23, 24 at a distance in the center axis direction to be engaged with the measuring chamber cylinder 3 for constituting a measuring chamber 9 in cooperation with the measuring chamber cylinder 3 wherein the piston 10 is slidable between a lower limit position where the liquid inlet 11 is opened for the measuring chamber 9 and the liquid flow-out opening 12 is closed and an upper limit position where the liquid inlet 11 is closed and the liquid flow-out opening 12 is opened, and a knock pin 31 for pushing the piston 10 to the lower limit position in contact with the piston 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid metering cap used when a fixed amount of liquid content such as a liquid detergent is discharged from a bottle.

[0002]

2. Description of the Related Art When washing and washing dishes and clothes, it is necessary to use an optimum amount of detergent for washing water. I need to take it out. For this reason, in the past, a measuring cup or measuring spoon was attached to the bottle, the liquid detergent contained in the bottle was first poured into the measuring cup or measuring spoon and measured, and then the liquid detergent was poured from the measuring cup or measuring spoon. Although it was intended to be poured into the washing water, weighing with a measuring cup or measuring spoon was troublesome, and it was inconvenient to attach it to a bottle because the measuring cup and measuring spoon were bulky. A measuring liquid dispensing container having a mechanism incorporated in a bottle has been developed (see Japanese Utility Model Laid-Open No. 4-10052).

[0003]

However, the conventional liquid metering container requires a long pipe and a valve mechanism incorporating a spring, so that the number of components is large and the number of manufacturing steps is large. There were many things. For this reason, the development of a measuring liquid dispensing mechanism that can surely perform the dispensing of the liquid content, is easy to perform, and has a small number of components and is easy to manufacture. Is desired. The present invention has been made in view of the circumstances described above, and can reliably perform metering and dispensing of a liquid content, and the operation for the same is simple, the number of constituent parts is small, and manufacturing is possible. It is an object of the present invention to provide a metering liquid discharging mechanism which is easy to perform.

[0004]

SUMMARY OF THE INVENTION In response to this object, a liquid metering cap according to the present invention has a liquid inflow port near the inside of the bottle and a liquid outflow opening near the outside of the bottle in the central axis direction. A measuring chamber cylinder fixed to the nozzle of the bottle, and two piston plates spaced from each other in the center axis direction. A measuring chamber is formed in a region surrounded by the two piston plates, and a lower limit position at which the liquid inlet is opened to the measuring chamber and the liquid outflow opening is closed; and a liquid inlet relative to the measuring chamber. A piston slidable between an upper limit position for closing the liquid outlet opening and a liquid support opening, a piston support member engaging with the piston to position the upper limit position and the lower limit position, and a contact member for the piston. Touch the piston It is characterized by having a knock pin depressing the position.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings showing an embodiment. In FIG. 1, 1 is a liquid metering cap. Liquid metering cap 1
Has a body cap 2 and a piston 10. The main body cap 2 has a measuring chamber tube 3 at the center. The measuring chamber cylinder 3 has a cylindrical large-diameter cylinder 5 and a small-diameter cylinder 6 that are continuous in the central axis direction with a shoulder 4 as a boundary.

The measuring chamber tube 3 is provided with a nozzle 8 of a flexible bottle 7.
It is arranged to be located within. A liquid inlet 11 is formed by cutting out the end of the large-diameter cylinder 5 closer to the inside of the bottle in the center axis direction, that is, the lower end of the large-diameter cylinder 5 in FIG. A liquid outflow opening 12 is formed in a notch at the upper end of 6. A cylindrical piston support tube 13 is provided on the upper surface of the small-diameter tube 6 so as to penetrate the inside and outside of the small-diameter tube 6. An annular projection 14 for engagement is formed on the inner surface of the lower end of the piston support cylinder 13. A guide cylinder 15 stands up from the shoulder 4. The guide tube 15 guides the small cap 16 described later in the central axis direction. On the other hand, the inner cylinder 17 rises from the edge of the upper surface of the shoulder 4, and the outer cylinder 18 falls from the upper end of the inner cylinder 17. A screw 21 is formed on the inner surface of the outer cylinder 18. The screw 21 is screwed into a screw 22 on the outer surface of the nozzle 8 of the bottle 7, thereby fixing the measuring chamber cylinder 3 to the nozzle 8.

The piston 10 is formed by integrally connecting two piston plates, that is, a large-diameter piston plate 23 and a small-diameter piston plate 24, at intervals in the center axis direction with a shaft 25 at intervals in the center axis direction. And is slidably incorporated in the measuring chamber tube 3. At this time, the large-diameter piston plate 23 is slidably engaged in the large-diameter cylinder 5, and the small-diameter piston plate 24 is slidably engaged in the small-diameter cylinder 6. A space defined by the inner surface of the large-diameter piston plate 23, the inner surface of the small-diameter piston plate 24, the outer surface of the shaft 25, and the inner surface of the measuring chamber tube 3 constitutes the measuring chamber 9 having a constant volume. From the upper surface of the small-diameter piston plate 24, a piston support 26 extends substantially in the central axis direction. The piston support portion 26 has three or four rod-like members 27 arranged in the circumferential direction with a gap therebetween, and each of the rod-like members 27 spreads outward toward the tip to form a leaf spring, A locking projection 28 is formed outside the distal end.
A contact portion 29 is provided at the center of the base end of the piston support portion 26.
Having. The piston support 26 is slidable along the inner surface of the piston support cylinder 13 by the movement of the piston 10. A knock pin 31, which will be described later, is inserted into the piston support portion 26. The uppermost position of the piston support portion 26 ascended is determined by the position of the knock pin 31, and the lowermost lower position of the piston support portion 26 is an annular shape of the piston support tube 13. This is determined by the locking projection 28 of the piston support 26 being locked to the projection 14.

The small cap 16 is attached to the guide cylinder 15 of the measuring chamber cylinder 3.
Are slidably fitted. The small cap 16 has an inner cylinder 32 and an outer cylinder 33 forming an annular gap 31 with an open lower end, and has a spout 34 at the upper end. The small cap 16 has an annular locking projection 35 formed on the outer surface of the inner tube 32 from the lowermost lower position where the lower end of the inner tube 32 abuts against the upper surface of the shoulder portion 4 of the measuring chamber tube 3 and the inner surface of the guide tube 15. Can be slid in the direction of the central axis up to the ascending uppermost position where the annular engaging projection 36 formed on the upper surface comes into contact. When the small cap 16 is fitted to the measuring chamber tube 3,
The liquid outflow opening 12 and the extraction port 34 of the small cap 16 communicate with each other. A knock pin 31 extends downward from the small cap 16 and is inserted into the piston support portion 26. When the small cap 16 is at the uppermost position, the piston 10 is allowed to move to the upper limit position. When the cap 16 is at the lowermost lower position, the piston is pushed down to the lowermost position.

The operation of pouring out the liquid content from the bottle 7 in the liquid metering cap 1 constructed as described above is as follows. When the small cap 16 is at the lowermost lower position as shown in FIG. 1, the piston 10 is pushed down by the knock pin 31 and is at the lowermost position. At this time, the measuring chamber 9 communicates with the inside of the bottle 7 through the liquid inlet 11. The communication between the measuring chamber 9 and the opening 12 is blocked by a small-diameter piston plate 24.

Next, as shown in FIG.
Pull up. The small cap 16 is stopped by sliding the locking projection 35 on the outer surface of the inner cylinder 32 up to the uppermost position where it comes into contact with the engagement projection 36 of the guide cylinder 15. As a result, the knock pin 31 is also raised, and the piston 10 is at the lower limit position and can be raised to the upper limit position (FIG. 4A). In this state, the bottle 7 is turned upside down to be inverted. The liquid content in the bottle 7 flows into the measuring chamber 9 through the liquid inlet 11 and fills the measuring chamber 9. Since the volume of the measuring chamber 9 is constant, a constant amount of the liquid content has been measured here (FIG. 4b).

Next, the flexible bottle 7 is pressed by hand (FIG. 4c). By this pressing, the internal pressure of the bottle 7 rises, and the piston 10 is raised by this internal pressure (down in the inverted state shown in FIG. 4C), the liquid inlet 11 is closed by the large-diameter piston plate 23, and the opening 12 Since has not yet been opened, the liquid content metered into the metering chamber 9 rises with the piston 10.

Next, when the piston 10 is further raised, the small-diameter piston plate 24 finally reaches the position of the liquid outflow opening 12, the liquid outflow opening 12 is opened, and the liquid content measured in the measuring chamber 9 is discharged. Small cap 1 from opening 12
6 and flows out from the extraction port 34 of the small cap 16. This completes the dispensing of the weighed liquid content (FIG. 4d).

After the metered liquid content has been dispensed, the bottle 7 is turned upright (FIG. 4e) and the small cap 16
By pressing down, the knock pin 31 suspended from the small cap 16 contacts the contact portion 29 of the piston support portion 26 to push down the piston 10 to the lowermost lowermost position and return to the original state (FIG. 4f).

FIG. 5 to FIG. 7 show a liquid metering cap 1b according to another embodiment of the present invention, which is formed integrally with or separately from the metering chamber tube 9 and is formed of the measuring chamber tube 9. It has a canopy that can be fitted into the opening, and the knock pin protrudes from the canopy. That is, FIGS.
, 1b is a liquid metering cap. The liquid metering cap 1b has a main body cap 2 and a piston 10. The main body cap 2 has a measuring chamber tube 3 at the center. A liquid inlet 11 is cut out at an end of the weighing chamber tube 3 closer to the inside of the bottle in the center axis direction, a liquid outlet opening 12 is formed at an end closer to the outside of the bottle, and a spout 34 is provided at the upper end. Is formed. A cylindrical piston support cylinder 13 is provided on the lower surface of the measurement chamber cylinder 3 so as to penetrate the inside and outside of the measurement chamber cylinder 3. An annular projection 14 for engagement is formed on the inner surface of the upper end of the piston support cylinder 13.

An outer cylinder 18 falls down from the upper end of the measuring chamber cylinder 3. A screw 21 is formed on the inner surface of the outer cylinder 18, and the screw 21 is screwed into a screw 22 on the outer surface of the nozzle 8 of the bottle 7.
Fixed to The piston 10 is formed by integrally connecting two piston plates, that is, an upper piston plate 23 and a lower piston plate 24, at intervals in the center axis direction with a shaft 25 at intervals in the center axis direction. 3 and is slidably incorporated therein.

The inner surface of the upper piston plate 23 and the lower piston plate 2
The space defined by the inner surface of 4, the outer surface of the shaft 25, and the inner surface of the measuring chamber tube 3 constitutes the measuring chamber 9 having a constant volume. A piston support portion 26 extends from the lower surface of the lower piston plate 24 substantially in the central axis direction. The piston support portions 26 are arranged in the circumferential direction with a gap formed in a slit shape.
There are four or four rod-like members 27, and each rod-like member 27 has a leaf spring shape that spreads outward toward the tip, and a locking projection 28 is formed on the outside of the tip. The piston support 26 is slidable along the inner surface of the piston support cylinder 13 by the movement of the piston 10. The upper limit of the piston 10 is the annular projection 1 of the piston support cylinder 13.
The lower limit of the piston 10 is determined by the lower piston plate 24 abutting on the lower surface in the measuring chamber cylinder 3.

A canopy 41 is connected to the outer surface of the upper end of the outer cylinder 18 via a hinge 40. The knock pin 31 extends downward from the inner surface of the canopy 41. Canopy 41
Can be fitted to the measuring chamber cylinder 3 in a state of covering the spout 34, and in a state where the canopy 41 is fitted to the measuring chamber cylinder 3,
The knock pin 31 contacts the upper surface of the upper piston plate 23 and pushes down the piston 10 to the lower limit position. However, this canopy 4
1 may be separate from the measuring chamber cylinder 3.

The operation of discharging the liquid contents from the bottle 7 in the liquid metering cap 1b thus configured is as follows. As shown in FIG. 5, in a state where the canopy 41 is fitted to the measuring chamber cylinder 3, when the canopy 41 is opened from the state where the knock pin 31 pushes down the piston 10 to the lower limit position, the knock pin 31 separates from the upper piston plate 23, The piston 10 becomes movable.

Next, in this state, the bottle 7 is tilted upside down to be inverted. The liquid content in the bottle 7 flows into the measuring chamber 9 through the liquid inlet 11 and fills the measuring chamber 9.
Since the volume of the measuring chamber 9 is constant, a constant amount of the liquid content has been measured here (FIG. 8a). Next, the flexible bottle 7 is pressed by hand (FIG. 8B). Due to this pressing, the internal pressure of the bottle 7 increases, and the piston 10 is raised by the internal pressure (lowering in the inverted state shown in FIG. 8B),
The liquid inlet 11 is closed by the lower piston plate 23,
Since the liquid outlet opening 12 is not yet open, the measuring chamber 9
The liquid content metered in rises with the piston 10 (FIG. 8b).

Next, when the piston 10 is further raised, the upper piston plate 23 finally reaches the position of the liquid outflow opening 12, the liquid outflow opening 12 is opened, and the liquid content measured in the measuring chamber 9 is opened. From the outlet 34. This completes the dispensing of the weighed liquid content (FIG. 8c).

After the metered liquid contents have been poured out, the bottle 7 is returned to the upright position (FIG. 8D), the canopy 41 is put on the measuring chamber tube 3 (FIG. 8E), and the piston 1 is pushed by the knock pin 31.
0 is pushed down to the lower limit position to return to the initial state (FIG. 8).
f).

FIGS. 9 to 11 show a liquid metering cap 1c according to still another embodiment of the present invention, in which the measuring chamber tube 3 includes a measuring chamber tube main body 46 and the measuring chamber tube main body 46. And a spouting tool 47 fitted to the end in the central axis direction of the spout. The spouting tool 47 has the liquid outflow opening 12 and the spout 34 communicating with the liquid outflow opening 12. And a canopy 41 formed integrally with or separately from the spout 34, and the knock pin 31 protrudes from the inner surface of the canopy 41. The pouring tool 47 may be formed integrally with the measuring chamber cylinder main body 46.

That is, in FIGS. 9 to 11, 1c
Is a liquid metering cap. The liquid metering cap 1c has a main body cap 2 and a piston 10. The main body cap 2 has a measuring chamber tube 3 at the center, and the measuring chamber tube 3 has a measuring chamber tube main body 46 and a pouring tool 47 fitted to an end of the measuring chamber tube main body 46 in the central axis direction. . Weighing chamber tube body 4
6, the liquid inlet 11 is cut out at the end of the sliding cylinder 48 near the inside of the bottle in the center axis direction, and the liquid outflow opening 12 is formed at the pouring tool 47 located at the end near the outside of the bottle.
Are formed, and a spout 34 is formed at the upper end. The liquid outflow opening 12 of the pouring tool 47 is formed such that a circumferential portion 49a of the upper end of the wall surface of the inner cylinder 49 of the pouring tool 47 on which the piston 10 slides in the central axis direction is lower than other portions 49b. It is a thing. Also, the measuring chamber cylinder body 4
On the lower surface of 6, a cylindrical piston support cylinder 13 is provided so as to penetrate the inside and outside of the measuring chamber cylinder main body 46. An annular projection 14 for engagement is formed on the inner surface of the upper end of the piston support cylinder 13.

The outer cylinder 18 extends from the lower end of the measuring chamber cylinder body 46.
Is falling. A screw 21 is formed on the inner surface of the outer cylinder 18, and the screw 21 is screwed into a screw 22 on the outer surface of the nozzle 8 of the bottle 7.
6 is fixed to the nozzle 8.

The pouring tool 47 has an inner cylinder 49, a liquid guide cylinder 51, and an outer cylinder 52 formed continuously and concentrically, and an annular gap 53 between the inner cylinder 49 and the liquid guide cylinder 51 is formed. The liquid guide cylinder 51 and the outer cylinder 52 are open upward.
Is opened downward, and the spouting tool 47 is fitted to the measuring chamber cylinder main body 46 with the upper end of the measuring chamber cylinder main body 46 sandwiched in the annular gap 54.

The piston 10 is formed by integrally connecting two piston plates, that is, an upper piston plate 23 and a lower piston plate 24, at intervals in the center axis direction with a shaft bar 25 at intervals in the center axis direction. The upper piston plate 23 is slidably engaged with the inner surface of the inner tube 49 of the extractor 47, and the lower piston plate 24 is slidably engaged with the inner surface of the sliding tube 48 in the measuring chamber tube 3. It has been incorporated. A space defined by the inner surface of the upper piston plate 23, the inner surface of the lower piston plate 24, the outer surface of the shaft 25, and the inner surface of the measuring chamber tube 3 has a measuring chamber 9 having a constant volume.
Is configured.

From the lower surface of the lower piston plate 24, a piston support 26 extends substantially in the central axis direction. The piston support portion 26 has three or four rod-like members 27 arranged in the circumferential direction with a gap formed in a slit shape, and each of the rod-like members 27 spreads outward toward the front end, and the plate springs A locking projection 28 is formed on the outside of the tip. The piston support 26 is slidable along the inner surface of the piston support cylinder 13 by the movement of the piston 10. The upper limit position of the piston 10 is the piston support cylinder 1
The projection 2 for engaging the piston support 26 with the annular projection 14
8 is locked and the piston 1
The lower limit position of 0 is determined by the lower piston plate 24 abutting on the lower surface of the measuring chamber cylinder 3.

A canopy 41 is connected to the outer surface of the upper end of the pouring tool 47 via a hinge 40. The knock pin 31 extends downward from the inner surface of the canopy 41. Canopy 41
Can be fitted to the measuring chamber cylinder 3 in a state of covering the spout 34, and in a state where the canopy 41 is fitted to the measuring chamber cylinder 3,
The knock pin 31 contacts the upper surface of the upper piston plate 23 and pushes down the piston 10 to the lower limit position. However, this canopy 4
1 may be separate from the measuring chamber cylinder 3.

The operation of discharging the liquid content from the bottle 7 in the liquid metering cap 1c thus configured is as follows. As shown in FIG. 9, in a state where the canopy 41 is fitted to the measuring chamber cylinder 3, when the canopy 41 is opened from the state where the knock pin 31 pushes down the piston 10 to the lower limit position, the knock pin 31 separates from the upper piston plate 23, The piston 10 becomes movable.

Next, in this state, the bottle 7 is turned upside down and tilted. The liquid content in the bottle 7 flows into the measuring chamber 9 through the liquid inlet 11 and fills the measuring chamber 9.
Since the volume of the measuring chamber 9 is constant, a certain amount of the liquid content has been measured here (FIG. 12a). Next, the flexible bottle 7 is pressed by hand (FIG. 12b). By this pressing, the internal pressure of the bottle 7 rises, and the piston 10 is raised by this internal pressure (down in the inverted state shown in FIG. 12B), the liquid inlet 11 is closed by the lower piston plate 24, and the liquid outlet port is opened. Since part 12 is not yet open,
The liquid content measured in the measuring chamber 9 rises together with the piston 10.

Next, when the piston 10 is further raised, the upper piston plate 23 finally passes over the lower portion 49a of the upper end of the inner cylinder 49, the liquid outlet opening 12 is opened, and the measuring chamber 9 is opened.
The liquid content metered therein flows out of the opening 12 and further out of the spout 34. This completes the dispensing of the metered liquid content (FIG. 12c).

After the metered liquid contents have been poured out, the bottle 7 is returned to the upright position (FIG. 12d), the canopy 41 is put on the measuring chamber tube 3 (FIG. 12e), and the piston 10 is lowered to the lower limit by the knock pin 31. Press down to the position to return to the initial state (FIG. 12f).

[0033]

According to the liquid metering cap of the present invention, the liquid content to be poured out is once poured into the measuring chamber 9 having a fixed volume and measured, and then the liquid content is discharged. A certain amount of extraction is possible. In addition, the liquid metering cap has a small number of components. For example, the liquid metering cap 1 has a small cap 16, a main body cap 2 and a piston 10, and the liquid metering cap 1b has a body cap 2 and a piston 10. Since the liquid metering cap 1c is composed only of the three members of the spouting tool 47, the main body cap 2, and the piston 10, the structure is simplified, the number of manufacturing steps is reduced, and the manufacturing is facilitated. Thus, according to the present invention, it is possible to obtain a liquid metering cap capable of reliably performing the metering / dispensing of the liquid content, the operation for which is simple, the number of components being small, and the manufacture being easy. it can.

[Brief description of the drawings]

 Fig. 1 Longitudinal sectional view of the liquid metering cap Fig. 2 Top view of the small cap Fig. 3 End view of AA part in Fig. 1 Fig. 4 Explanatory diagram showing operation Fig. 5 Longitudinal sectional view of another liquid metering cap Fig. 6 7 is a bottom view of another liquid metering cap. FIG. 8 is an explanatory view showing the operation. FIG. 9 is a vertical sectional view of another liquid metering cap. FIG. 10 is a plane view of another liquid metering cap. Fig. 11 Bottom view of still another liquid metering cap Fig. 12 Explanatory drawing showing operation 1 Liquid metering cap 2 Main body cap 3 Metering chamber cylinder 4 Shoulder part 5 Large diameter cylinder 6 Small diameter cylinder 7 Bottle 8 Nozzle 9 Weighing chamber 10 Piston 11 Liquid inlet 12 Liquid outflow opening 13 Piston support cylinder 14 Annular projection 15 Guide cylinder 16 Small cap 17 Inner cylinder 18 Outer cylinder 21 Screw 22 Screw 23 Large diameter pin Ton plate 24 Small-diameter piston plate 25 Shaft bar 26 Piston support part 27 Rod-shaped member 28 Locking projection 29 Contact part 31 Dowel pin 32 Inner cylinder 33 Outer cylinder 34 Outlet 35 Engagement projection 36 Engagement projection 40 Hinge 41 Top lid 46 Measuring cylinder body 47 Discharge tool 48 Sliding cylinder 49 Inner cylinder 51 Liquid guide cylinder 52 Outer cylinder 53 Annular gap 54 Annular gap

Claims (8)

[Claims] 1. A measuring chamber cylinder having a liquid inlet port near the inner side of the bottle in the center axis direction and a liquid outlet port closer to the outer side of the bottle and fixedly disposed to a nozzle in the bottle, A measuring chamber formed in an area surrounded by the measuring chamber cylinder and the two piston plates by engaging with the measuring chamber cylinder and having two piston plates spaced from each other in a central axis direction; Between a lower limit position where the liquid inlet port is opened and the liquid outlet opening is closed with respect to the measuring chamber and an upper limit position where the liquid inlet port is closed and the liquid outlet port is opened with respect to the measuring chamber. A liquid metering cap, comprising: a slidable piston; and a knock pin abutting on the piston to push the piston to the lower limit position. 2. A piston support portion extending substantially from one of the two piston plates in the direction of the central axis and slidable in a piston support tube fixed to the measuring chamber tube. The piston support portion has a plurality of rod-shaped members arranged in the circumferential direction at an interval, and the rod-shaped member has a leaf spring shape that spreads outward toward the tip, and a locking projection is provided at the tip. 2. The liquid metering cap according to claim 1, wherein the cap is formed. 3. A small cap having a liquid spout communicating with the liquid outflow opening around the liquid outflow opening is fitted to the measuring chamber cylinder so as to be slidable in the central axis direction.
The liquid dosing metering cap according to claim 1, wherein the knock pin protrudes from the small cap. 4. A canopy which is formed integrally with the measuring chamber cylinder and can be fitted to the measuring chamber cylinder so as to cover the liquid outflow opening, and the knock pin projects from the canopy. The liquid metering cap according to claim 1, wherein: 5. A canopy formed separately from said measuring chamber cylinder and fitted to said measuring chamber cylinder so as to cover said liquid outflow opening, said knock pin protruding from said canopy. The liquid metering cap according to claim 1, wherein the liquid metering cap is provided. 6. The measuring chamber cylinder body is fitted to the measuring chamber cylinder main body and an end of the measuring chamber cylinder main body in the central axis direction, and is connected to the liquid outflow opening and the liquid outflow opening. And a canopy that is formed integrally with or separate from the spouting tool and that can be fitted to the measuring chamber cylinder in a state of covering the spout, and the knock pin protrudes from the canopy. The liquid metering cap according to claim 1, wherein: 7. The measuring chamber cylinder is formed integrally with the measuring chamber cylinder main body and the end of the measuring chamber cylinder main body in the central axis direction, and communicates with the liquid outflow opening and the liquid outflow opening. Having a spout having an outlet, having a canopy formed integrally with or separate from the spout and capable of fitting to the spout;
2. The liquid metering cap according to claim 1, wherein the knock pin protrudes from the canopy. 8. The liquid outflow opening of the spouting tool is formed such that a part of a circumferential surface of an upper end in a direction of the central axis of a wall surface of a measuring chamber cylinder on which the piston slides is lower than other parts. 9. The method according to claim 7, wherein
Liquid metering cap as described.