JPH09295658A - Measuring cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring cap which can stabilize the amount of discharge by making it possible for a piston to operate smoothly. SOLUTION: This measuring cap is provided with a cap main body 3 with a discharge opening 2, a piston 4 for opening and closing the discharge opening 2, a spring member 5 energizing the piston 4 to move away from the cap main body 3 and a guiding cylinder part 6 for guiding the outer periphery of the piston 4. A first through channel 71 is formed in the piston 4 communicating the inner space 14 of a container with the inner space 13 of the guiding cylinder part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring cap for use in a squeeze container that discharges a relatively high-viscosity content liquid such as shampoo or rinse by compressing the container, and in particular, enables one-touch discharge operation. Regarding things.

[0002]

2. Description of the Related Art As a conventional measuring cap of this type,
For example, there is one as shown in Japanese Utility Model Laid-Open No. 3-64240. That is, it reciprocates between a cap main body having a discharge port attached to the container opening, a return position separated from the cap main body by a predetermined distance, and a discharge completion position in which the cap main body is contacted to close the discharge port. A free piston, a spring member for urging the piston in a direction to separate it from the cap body, a guide cylinder portion provided in the cap body for guiding the outer circumference of the piston, an inner space of the guide cylinder portion and an inner space of the container. And a flow path communicating with and.

Then, by compressing the container, the content liquid in the container is discharged from the discharge port through the flow passage through the inner space of the guide tube portion, and the piston moves as the spring member along with the movement of the content liquid. The ejection amount is restricted to a predetermined amount by moving the ejection port from the return position to the ejection completion position against the biasing force of.

When the compressive force of the container is released, the piston is returned to the return position by the spring member, and when the container elastically returns to its original shape, the inside of the container is in a depressurized state, and the piston and the guide tube are discharged from the discharge port. Air flows into the container through the gap between the parts.

[0005]

However, in the case of the above-mentioned prior art, since the gap between the outer circumference of the piston and the inner circumference of the guide cylinder is narrow, it is difficult for the piston to move smoothly. This is particularly noticeable when the content liquid is a highly viscous liquid. If the movement of the piston is obstructed, it takes a long time for the piston to reach the discharge completion position during discharge, and the discharge amount increases, and it is difficult for the piston after discharge to smoothly return to the return position. When the next discharge operation is performed in this state, the stroke of the piston up to the discharge completion position varies, and as a result, the discharge amount decreases, and the discharge amount varies and is not stable.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to:
It is an object of the present invention to provide a measuring cap capable of stabilizing the discharge amount by allowing the piston to operate smoothly.

[0007]

In order to achieve the above object, according to the present invention, a cap main body having a discharge port attached to an opening of a container and a return unit separated from the cap main body by a predetermined distance. A piston that is reciprocally movable between a position and a discharge completion position that abuts on the cap body and closes the discharge port, a spring member that urges the piston in a direction of separating the piston from the cap body, and the cap body. A guide cylinder part that guides the outer circumference of the piston, and a flow path that connects the internal space of the guide cylinder part and the internal space of the container,
By compressing the container, the liquid content in the container is discharged from the discharge port through the flow passage through the internal space of the guide cylinder, and the piston is urged by the spring member as the liquid content moves. In the measuring cap that moves from the return position to the discharge completion position to block the discharge port to limit the discharge amount to a predetermined amount, the flow passage includes a first flow passage formed to penetrate the piston. Characterize.

In the present invention, the piston is normally separated from the cap body by the spring force of the spring member.
When the container is compressed to discharge the content liquid, the content liquid flows into the internal space in the guide cylinder through the flow path having the first flow path formed through the piston, and is discharged from the discharge port.

Therefore, the piston obtains a propulsive force by the flow pressure of the content liquid and the fluid friction of the content liquid passing through the first flow path, and smoothly moves to the cap body side to reach the discharge completion position. Is stable and a stable discharge amount can be secured. Even after the discharge is completed, the air mainly flows into the container quickly through the first flow path of the piston, and the container quickly returns elastically.

Further, the flow passage is characterized by having a second flow passage formed by a gap between the outer circumference of the piston and the inner circumference of the guide cylinder.

With this configuration, the content liquid flows into the guide cylinder through the first and second flow paths, the content liquid quickly flows into the guide cylinder, and a sufficient discharge amount is obtained in a short time. Can be secured. Further, the content liquid flows on the inner and outer circumferences of the piston, and the fluid friction caused by the flow of the content liquid acts not only on the inner circumference but also on the outer circumference of the piston, and the piston moves more smoothly.

Further, even when a third flow path constituted by a through hole formed in the peripheral wall of the guide cylinder is provided as the flow path, the first and third flow paths are provided, or the first and second flow paths are provided.
And the content liquid flows into the guide tube through the third flow path,
It is possible to secure a sufficient discharge amount in a short time. Also,
Even if the remaining amount of the content liquid becomes lower than the height of the guide tube portion, the content liquid can be discharged through the third flow path, and the remaining amount of the content liquid can be reduced as much as possible.

Between the cap body and the piston, a first seal portion axially abuts at the discharge completion position to seal the space between the first flow path and the discharge port, and the space between the second flow path and the discharge port is sealed. And a second seal portion.

With this configuration, the content liquid flowing from the first flow passage is sealed by the first seal portion, and the content liquid flowing from the second flow passage or the third flow passage is sealed by the second seal portion. As a result, the content liquid can be reliably sealed at the discharge completion position.

Furthermore, the first valve mechanism, which normally holds the discharge port in the closed state in the cap body, opens the discharge port by the pressure difference between the internal pressure in the container compressed when the content liquid is discharged and the atmospheric pressure. And allow the inflow of air from the outside of the container into the container,
And a second valve mechanism that prevents the content liquid from flowing out from the inside of the container to the outside of the container.

With this configuration, the discharge port is closed by the first valve mechanism only by directing the discharge port downward, so that it is possible to prevent accidental dripping when the container is inverted.

Further, since the discharge port is normally held in the closed state by the first valve mechanism, the sealing property becomes perfect.

Further, the first valve mechanism will not open unless the pressure difference between the internal pressure and the atmospheric pressure reaches a predetermined pressure during discharge, so that the first valve mechanism does not open until the pressure has reached a level at which the piston moves. If the valve opening pressure is set to, the moving speed of the piston can be kept within a certain range, and the discharge amount can be stabilized.

Further, the first valve mechanism and the second valve mechanism are constituted by one valve, and the valve normally holds the discharge port in a closed state and is a container compressed when discharging the content liquid. Opening the discharge port by the pressure difference between the internal pressure and the atmospheric pressure
The second open state in which the discharge port is opened by the pressure difference between the internal pressure and the atmospheric pressure in the reduced pressure state when the compressed container is elastically restored after the content liquid is discharged. It is characterized in that it is configured to switch to.

In this way, one valve can perform two functions, so that the structure is simplified.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment.

[First Embodiment] FIGS. 1 and 2 show a measuring cap according to a first embodiment of the present invention.

That is, the measuring cap 1 has a cap body 3 having a discharge port 2 attached to the container opening 10.
A piston 4 which is reciprocally movable in a direction of moving toward and away from the cap body 3, a spring member 5 which biases the piston 4 in a direction of moving away from the cap body 3, and the piston provided in the cap body 3. And a guide tube portion 6 that guides the outer circumference of 4.

The cap body 3 is composed of a top plate portion 31 that covers the container opening 10, and a cylindrical wall portion 32 that hangs downward from the peripheral edge of the top plate portion 31. This top plate 31
The discharge port 2 is provided at the center of the cylindrical wall portion 32, and the internal wall 33 of the cylindrical wall portion 32 is provided with a female screw 33 that is screwed into the male screw 12 formed on the outer periphery of the neck portion 11 surrounding the container opening 10. A lid 35 is openably and closably attached to the cap body 3 via a hinge 34, and the discharge port 2 is attached to the lid 35.
A plug portion 36 that can be freely inserted and removed is formed in a protruding manner.

The piston 4 has a cylindrical shape with a flange having a flange portion 41 at the lower end, is provided with a first flow path 71 penetratingly formed in the central axis direction, and is provided at a return position A apart from the cap body 3 by a predetermined distance. And a discharge completion position B that abuts on the cap body 3 and closes the discharge port 2.

The guide tube portion 6 has a bottomed cylindrical shape that opens downward,
A cylindrical wall portion 61 and an upper bottom portion 62 are provided, and the cylindrical wall portion 6 is further provided.
A flange portion 63 is provided on the outer periphery of the upper end of the piston 1 so as to face the flange portion 41 of the piston 4 in the axial direction. The upper bottom portion 62 is in close contact with the lower end surface of the top plate portion 31 of the cap body 3, and an annular projection 37 with which the flange portion 63 of the guide cylinder portion 6 is locked is provided on the lower end surface of the top plate portion 31. In addition, the upper bottom portion 62 has a discharge port 2 at a portion corresponding to the discharge port 2.
A larger diameter hole 64 is provided.

The return position A of the piston 4 is positioned by a stopper 65 provided at the open end of the guide tube portion 6 and a tapered step portion 42 provided on the outer circumference of the piston 4 that abuts on the stopper 65. To be done.

The spring member 5 is a coil spring which is mounted on the outer periphery of the guide cylinder portion 6, one end of which is engaged with the flange portion 63 of the guide cylinder portion 6 and the other end of which is engaged with the flange portion 41 of the piston 4. There is.

When the piston 4 is inserted into the guide tube portion 6, the internal space 13 inside the guide tube portion 6 and the internal space 14 of the container are partitioned from each other. A flow path 7 that communicates with the internal space 14 of the container is provided.

The flow passage 7 includes the above-mentioned first flow passage 71 formed through the piston 4, and a second flow passage 72 formed by an annular gap between the outer circumference of the piston 4 and the inner circumference of the guide cylinder portion 6.
The third flow path 73 is formed by a plurality of through holes formed at the upper end of the peripheral wall of the guide tube portion 6. The first flow path 71 is located on the same line as the discharge port 2.

On the other hand, between the cap body 3 and the piston 4, a first seal portion 8 that axially abuts at the discharge completion position B to seal between the first flow passage 71 and the discharge port 2, and a second seal portion 8 A second seal portion 9 that seals between the flow path 72 and the discharge port 2 is provided.

The first seal portion 8 is composed of a first seal seat portion 81 disposed below the spout 2 at a predetermined distance, and a first seal seat portion formed at an intermediate portion of the inner circumference of the piston 4. And a seal step portion 82 that abuts on the portion 81. The first seal seat portion 81, as shown in FIG.
It is supported by the upper bottom portion 62 of the guide tubular portion 6 by a plurality of columns 83. The discharge port 2 and the internal space 13 in the guide tube portion 6 are communicated with each other through the window 84 between the columns 83.

The second seal portion 9 is an annular second seal seat portion 9 formed adjacent to the outer side of the base 83 of the first seal seat portion 81 in the upper bottom portion 62 of the guide cylinder portion 6.
1 and an annular second seal projection 92 at the tip of the piston 4,
It is composed of

Next, the operation of the measuring cap in the present embodiment will be described.

First, as shown in FIG. 2A, the piston 4 is located at the return position A, which is separated from the cap body 3 by a predetermined distance by the spring force of the spring member 5, and the container is compressed in an inverted state. As a result, the piston 4 begins to descend due to the flow of the content liquid.

As shown in FIG. 2B, the content liquid L is the first
Through the third flow paths 71 to 73, the gas flows into the internal space 13 in the guide tube portion 6 and is discharged from the discharge port 2.

Then, as shown in FIG. 2C, when the piston 4 resists the urging force of the spring member 5 and reaches the discharge completion position B from the return position A with the flow of the content liquid, the discharge is completed. Complete. The discharge amount is adjusted by the time to the discharge completion position B and the cross-sectional area of the flow path 7.

In the present embodiment, the first to third flow paths 71 to 71
Since the content liquid flows into the inner space 13 of the guide tube portion 6 from three sides of 73, a sufficient discharge amount can be secured in a short time.

The piston 4 has a flange portion 4 of the piston 4.
The flow pressure acting on 1 and the fluid friction of the content liquid passing through the first flow passage 71 obtains a propulsive force to smoothly move to the cap body 3 side and stabilize the time until reaching the discharge completion position B. It is possible to secure a stable discharge amount. In particular, since the content liquid also flows into the guide tube portion 6 from the second flow path 72, the content liquid flows inside and outside the piston 4, and the fluid friction due to the flow of the content liquid is limited to the inside circumference of the piston 4. Not only does it act on the outer circumference, but the piston 4 moves more smoothly.

On the other hand, when the compression of the container is released (squeeze off) after the discharge is completed, the piston 4 is separated from the discharge completion position B by the elastic force of the spring member 5 as shown in FIG. 2 (d). 2 The seal of the seal portion 9 is released. At the same time, due to the elastic restoring force of the container, the internal space 1 of the container
4 is in a depressurized state, and air begins to flow from the discharge port 2 into the internal space 13 of the container through the internal space 12 of the guide tubular portion 6 and the first flow path 71 of the piston 4 (start of airbag). Air mainly passes through the first flow path 71 having the smallest flow path resistance.

At the time when the airbag is completed, as shown in FIG.
As shown in (e), the piston 4 has also returned to the return position A.

[Second Embodiment] FIG. 3 shows a second embodiment of the present invention.

The difference from the first embodiment is that the piston 204 and the guide cylinder portion 206 are shorter than those of the first embodiment, and the configuration of the first seal portion 208 is different. The point is that the position of the spring member 205 is different.

The first seal portion 208 has a flat first seal seat 281 around the spout 2 of the cap body 3, and a first seal body 282 that abuts the first seal seat 281 provided at the tip of the piston 204. It consists of The first seal body 282 has a flat plate shape and is supported by the plurality of columns 244 with respect to the piston body 243.
The window 245 between the first is provided in the piston body 243
It is an opening of the flow path 71.

The spring member 205 is the first seal body 28.
2 is a coil spring that is disposed around the end of the piston body 243.
It has engaged with the end surface of 03.

Since the other structure and operation are the same as those of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

[Third Embodiment] FIGS. 4 and 5 show a third embodiment of the present invention.

In the third embodiment, a valve 15 for opening and closing the discharge port 2 is provided on the outer end surface of the cap body 3 of the measuring cap 1 of the second embodiment shown in FIG.

Further, the valve 15 normally holds the discharge port 2 in a closed state, and opens the discharge port 2 by the pressure difference between the internal pressure and the atmospheric pressure compressed when the content liquid is discharged.
It has two functions: a valve mechanism and a second valve mechanism that allows the inflow of air from the outside of the container into the container and blocks the outflow of the content liquid from the inside of the container to the outside of the container.

That is, this valve 15 normally holds the discharge port 2 in a closed state, and opens the discharge port 2 by the pressure difference between the internal pressure compressed in the container and the atmospheric pressure when discharging the content liquid. The second opening, in which the discharge port 2 is opened by the pressure difference between the internal pressure and the atmospheric pressure in the container, which is in a depressurized state when the container compressed after the content liquid is discharged elastically returns It is configured to switch to the state.

As shown in FIGS. 4 (b) and 4 (c), the valve 15 is an inner diameter seal type, is formed by a rubber-like elastic body into a substantially hat-shaped cross section, and has a cylindrical peripheral wall 151 with a collar.
And an inner diameter seal portion 152 extending from the upper end of the peripheral wall 151 inward in the radial direction in a washer shape. The inner diameter seal portion 152 is gradually inclined downward in a mortar shape toward the center, and the inner diameter end portion 153 is formed.
Is in close contact with the peripheral surface of the valve seat portion 16 projecting from the upper surface of the cap body 3. In the first open state, the inner diameter seal portion 152 is opened upward and separated from the valve seat portion 161 (FIG. 4 (d)).
(In the direction of arrow a), the second open state is the inner diameter seal portion 152.
Is a state in which it opens downward and is separated from the peripheral surface of the valve seat portion 16 (direction of arrow b in FIG. 4D).

The valve seat portion 16 is composed of a plurality of columns 161 provided upright on the periphery of the discharge port 2 and a disc-shaped valve seat body 162 supported above the discharge port by the column 161. Thus, the inner diameter end portion 153 of the inner diameter seal portion 152 comes into close contact with the peripheral surface of the valve seat body 162.

FIG. 5 shows an operation procedure of the measuring cap 1 to which the valve 15 is added.

First of all, as shown in FIG.
Open to invert the container. This state is valve 15
Is in a closed state, and the content liquid hanging down to the discharge port 2 due to gravity is sealed by the valve 15.

Next, when the container is compressed and the pressure difference between the internal pressure and the atmospheric pressure in the container exceeds a predetermined value, the inner diameter seal portion 152 of the valve 15 moves upward as shown in FIG. The flexible discharge port 2 is opened to be in the first open state, and discharge of the content liquid is started. Here, the piston 204 does not move until the valve 15 is opened.

During the discharge of the content liquid, as shown in FIG. 7C, the content liquid in the container flows into the second passage between the first flow passage 71 inside the piston 204, the outer circumference of the piston 204 and the inner circumference of the guide cylinder 206. Through the flow path 72 and the third flow path 73 of the guide cylinder 206, the gas flows into the internal space 13 of the guide cylinder 206 and is discharged from the discharge port 2.

The flow of this content liquid causes the piston 204
Moves to the discharge completion position B, and the first seal body 282 of the piston 204 abuts on the first seal seat portion 281 as shown in FIG.
Comes into contact with the second seal seat 291 of the cap body 3 to close the discharge port 2.

Next, when the compressive force applied to the container is released, the piston 204 is separated from the end surface of the cap body 3 by the elastic force of the spring member 5 and the elasticity of the container is released, as shown in FIG. The container internal space 13 is decompressed by the restoring force, and the inner diameter seal portion 152 of the valve 15 is deformed to the upper surface side of the cap body 3 to be in the second open state.
Inflow of air (airbag) is started. At this time, air mainly flows into the container internal space 13 from the first flow path 71 inside the piston 204.

When the airbag is completed, the inner diameter seal portion 152 of the valve 15 returns to the closed state by its elastic restoring force, and the inner diameter end portion 153 comes into close contact with the outer periphery of the valve seat body 162, as shown in FIG. . Further, the piston 204 pushed by the spring member 5 is engaged with the stopper portion 264 at the tip of the guide tube portion 206 and its upward movement is restricted.

If the valve 15 is provided in this way, the discharge port 2 is closed by the valve 15 only by directing the discharge port 2 downward, so that inadvertent dripping when the container is inverted can be prevented. .

Further, since the discharge port 2 is normally held in the closed state by the valve 15, the sealing property is perfect.

Further, since the valve 15 does not open unless the pressure difference between the internal pressure and the atmospheric pressure reaches a predetermined pressure at the time of discharge, the valve 1 does not reach a pressure enough to move the piston 204.
If the valve opening pressure is set so that the valve 5 does not open, the moving speed of the piston 204 can be maintained within a fixed range, and the discharge amount can be stabilized.

Therefore, in order to prevent the propulsive force of the piston 204 from being affected by the speed and magnitude of the stroke, it is preferable to set the relationship of each force as follows.

FP ≧ Fv ≧ FsP ... where FP is the container internal pressure after squeezing, Fv is the valve seal pressure, and FsP is the set load of the spring member.

Although this valve is used to prevent liquid dripping when it is used upside down, 1 + ΔP (absolute value) ≧ Fv ... ΔP; decompression when the container is restored, because it is necessary to secure an airbag. It is required to set the quantity.

If the valve satisfies the above expressions at the same time, it is possible to stabilize the measurement and prevent the liquid from dripping when inverted.

[Other Embodiments] FIGS. 6 and 7 show another embodiment of the valve of the measuring cap according to the third embodiment shown in FIG.

That is, the valve 215 shown in FIG. 6 has a valve body 2 which can be attached to and detached from the periphery of the discharge port 2 on the upper surface of the cap body 3.
151, a fixed ring portion 2152 provided so as to surround the valve body 2151, and the fixed ring portion 2152
And a plurality of flexible arms 215 connecting between the valve body 2151
And 3. The arm portion 2153 has a leaf spring structure, and presses the valve body 2151 against the valve seat 2154 on the peripheral edge of the discharge port 2 with a predetermined pressure to keep the valve body 2153 in a normally closed state.

The valve 315 shown in FIG. 7 is provided with a cantilever flap-shaped valve body 3151. The valve body 3151 is capable of coming into contact with and separating from the peripheral edge of the discharge port 2 on the upper surface of the cap body 3.
And a fixed ring portion 3152 provided so as to surround the valve body 3151 and one connecting piece portion 3153 that connects the fixed ring portion 3152 and the valve body 3151. The connecting piece 3153 has a leaf spring structure and presses the valve body 3151 against the valve seat 3152 with a predetermined pressure to keep the valve body 3151 in a normally closed state.

The valves 215 and 315 shown in FIGS.
In this configuration, unlike the valve 15 shown in FIG. 4, since there is no passage at the time of airbag, each valve 215,
The valve bodies 2151 and 3151 of 315 may be provided with slits that are closed when the inside of the container is in a positive pressure state and can communicate with outside air when in a depressurized state.

Of course, a second valve mechanism such as a check valve may be separately provided to allow air to flow from the outside of the container into the container when the inside of the container is in a depressurized state due to the pressure difference from the atmosphere. You may stay.

[0072]

As described above, according to the present invention, the following special effects can be obtained.

[Claim 1] Since the flow path that connects the internal space of the guide cylinder portion and the internal space of the container is provided with the first flow path formed through the piston, when the container is compressed The piston obtains a propulsive force by the flow pressure of the content liquid and the fluid friction of the content liquid passing through the first flow path, and smoothly moves to the cap body side, so that a stable discharge amount can be secured.

Even after the discharge is completed, the air quickly flows into the container through the first flow path of the piston, and the container elastically returns quickly.

[Claim 2] If a second flow path constituted by a gap between the outer circumference of the piston and the inner circumference of the guide cylinder is added as a flow path, a sufficient discharge amount can be secured in a short time.
Further, the fluid friction caused by the flow of the content liquid acts not only on the inner circumference of the piston but also on the outer circumference thereof, and the piston moves more smoothly.

[Claim 3] If a third flow path constituted by through holes formed in the peripheral wall of the guide cylinder is added as a flow path,
The content liquid flows into the guide cylinder through the first and third flow paths or through the first, second and third flow paths, and a sufficient discharge amount can be secured in a short time. Further, even if the remaining amount of the content liquid becomes lower than the height of the guide tube portion, the content liquid can be discharged through the third flow path, and the remaining amount of the content liquid can be reduced as much as possible.

[Claim 4] Between the cap body and the piston, a first seal portion for sealing between the first flow path and the discharge port, and a second seal portion for sealing between the second flow path and the discharge port. By providing, it is possible to reliably seal the content liquid at the discharge completion position.

[Claim 5] By providing the cap body with the first valve mechanism for opening and closing the discharge port, it is possible to prevent accidental dripping when the container is inverted.

Further, since the discharge port is normally kept in the closed state by the first valve mechanism, the sealing property becomes perfect.

Further, since the first valve mechanism will not open unless the pressure difference between the internal pressure and the atmospheric pressure reaches a predetermined pressure during discharge, the first valve mechanism should not open until the pressure for moving the piston is reached. If the valve opening pressure is set to, the moving speed of the piston can be kept within a certain range, and the discharge amount can be stabilized.

On the other hand, by providing the second valve mechanism that prevents the outflow of the content liquid from the inside of the container to the outside and allows the inflow of air into the container, the first valve mechanism allows the discharge port at the discharge completion position. Even if is closed, the second valve mechanism can cancel the depressurized state in the container and elastically restore the shape of the container.

[Claim 6] The structure is simplified by constructing one valve to perform the two functions of the first valve mechanism and the second valve mechanism.

[Brief description of drawings]

FIG. 1 shows a measuring cap according to a first embodiment of the present invention, and FIG. 1 (a) is a vertical cross-sectional view showing a return position of a piston and a discharge completion position in a half section. FIG. 3B is a partially cutaway perspective view of the first seal portion.

FIG. 2 is an explanatory view showing an operation procedure of the measuring cap of FIG.

FIG. 3 is a vertical cross-sectional view showing, in a half section, a return position of a piston and a discharge completion position of a measuring cap according to a second embodiment of the present invention.

FIG. 4 shows a metering cap with a valve according to a third embodiment of the present invention, and FIG. 4 (a) is a vertical cross-sectional view showing the return position of the piston and the discharge completion position in a half section. FIG. 3B is a plan view of the valve, FIG. 3B is a vertical cross-sectional view of the valve, and FIG. 3D is an operation explanatory view of the valve.

5 is an explanatory view showing an operation procedure of the measuring cap of FIG. 4. FIG.

FIG. 6 shows a metering cap with a valve according to another embodiment of the present invention, wherein FIG. 6 (a) is a vertical sectional view,
1B is a plan view of the valve, and FIG. 1C is a vertical cross-sectional view of the valve.

FIG. 7 shows a metering cap with a valve according to another embodiment of the present invention, in which FIG. 7 (a) is a vertical sectional view,
1B is a plan view of the valve, and FIG. 1C is a vertical cross-sectional view of the valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measuring cap 2 Discharge port 3 Cap main body 4 Piston 5 Spring member 6 Guide cylinder part 7 Flow path 71-73 1st-3rd flow path 8 1st seal part 9 2nd seal part 10 Container opening 13 Guide cylinder part Internal space 14 Internal space of container 15 Valve 151 Circumferential wall portion 152 Inner diameter seal portion 153 Inner diameter end portion A Return position B Discharge completion position

Claims (6)

[Claims] 1. A cap main body having a discharge port attached to a container opening, a return position separated from the cap main body by a predetermined distance, and a discharge completion position for abutting the cap main body to close the discharge port. A reciprocally movable piston, a spring member for urging the piston in a direction to separate the piston from the cap body, a guide cylinder portion provided on the cap body for guiding the outer circumference of the piston, and an inside of the guide cylinder portion. A flow path communicating between the space and the internal space of the container, and by compressing the container, the content liquid in the container is discharged from the discharge port through the flow path through the internal space of the guide cylinder. In a measuring cap that moves the piston against the biasing force of the spring member from the return position to the discharge completion position with the movement of the content liquid to close the discharge port and limit the discharge amount to a predetermined amount, Flow path, metering cap, characterized in that it comprises a first flow path which is formed through the piston. 2. The measuring cap according to claim 1, wherein the flow passage includes a second flow passage formed by a gap between an outer circumference of the piston and an inner circumference of the guide cylinder. 3. The measuring cap according to claim 1, wherein the flow passage includes a third flow passage formed by a through hole formed in a peripheral wall of the guide cylinder portion. 4. A first seal portion, which axially abuts at a discharge completion position to seal between the first flow path and the discharge port, between the cap body and the piston, and between the second flow path and the discharge port. The 2nd sealing part which seals is provided, The measuring cap of Claim 2 or 3 characterized by the above-mentioned. 5. A first opening which normally holds a discharge port in a closed state in a cap body and opens the discharge port by discharging a content liquid by a pressure difference between an internal pressure in a compressed container and an atmospheric pressure. A valve mechanism, and a second valve mechanism that allows the inflow of air from the outside of the container to the inside of the container and prevents the outflow of the content liquid from the inside of the container to the outside of the container. The measuring cap according to 1, 2, 3 or 4. 6. The first valve mechanism and the second valve mechanism are constituted by a single valve, and the valve normally holds the discharge port in a closed state and is compressed when the content liquid is discharged. The internal pressure in the container is changed to the first open state in which the discharge port is opened by the pressure difference between the internal pressure in the container and the atmospheric pressure, and is further reduced when the container compressed after discharging the content liquid elastically returns. 6. The configuration is such that it is switched to a second open state in which the discharge port is opened by the pressure difference between the pressure and the atmospheric pressure.
The measuring cap according to the item.