JPH09290185A - Push type dispernser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent securely the generation of residue of liquid in the vicinity of the tip of a nozzle by a simple constitution. SOLUTION: A primary valve 32 is formed into the rod shape having a rod 32a extended into a piston 16, while a secondary valve 34 is disposed and retained around the primary valve 32 on the piston 16 in a manner of communicating with the primary valve 32 under the friction force. A stopper 42 is provided on the piston 16 above the secondary valve 34 in a manner of kicking the secondary valve 34, releasing the communication with the primary valve 32 and lowering the secondary valve 34 together with the piston 16. When a nozzle head 12 is lifted, the secondary valve 34 is closed only after the piston 16 is lifted, and the opening of the primary valve 32 before the closing of the secondary valve 34 is disturbed to carry out the back suction of residual liquid in the nozzle 12a and the piston 16 into a cylinder 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-type dispenser that sucks up liquid in a container into a cylinder and pressurizes it out of a nozzle of a nozzle head by reciprocating motion of a piston which is interlocked with the nozzle head.

[0002]

2. Description of the Related Art As a dispenser mounted on a container containing a liquid having a relatively high viscosity such as a shampoo or a rinse, for example, by a reciprocating motion of a piston in a cylinder which is interlocked with pushing of a nozzle head. A so-called push type dispenser having a structure in which a liquid in a container is sucked up into a cylinder and pressurized to flow out from a beak-shaped nozzle of a nozzle head is well known (for example, USP No. 3,062,416).

In this type of push type dispenser, an inflow passage for the liquid flowing from the container to the cylinder is formed in the suction tube, and an outflow passage for the liquid flowing out of the cylinder is a piston or a nozzle (nozzle head). It is formed on it. Then, the primary valve is arranged in the inflow passage to control the liquid flow between the container and the cylinder, and the secondary valve is arranged in the outflow passage to control the liquid flow between the cylinder and the nozzle. .

The nozzle head is fixed to the upper end of the piston and is integrated with the piston. Then, a return spring that pushes up the nozzle head integrally with the piston and raises (projects) it is built in, for example, a cylinder, and the biasing force of the return spring causes the nozzle head and the piston to move upward (upward position). , Initial position).

When the nozzle head, that is, the piston, returns to the upper position after the nozzle head is pushed downward from the upper position (initial position) against the biasing force of the return spring, the inside of the cylinder becomes negative pressure. The liquid in the container is sucked up into the cylinder through the primary valve. Then, when the nozzle head is pushed in from the upper position against the biasing force of the return spring, the liquid in the cylinder is pressurized by the downward movement of the piston linked to the nozzle head, and the pressurized liquid flows out through the secondary valve. It flows through the passage and flows out from the tip of the nozzle of the nozzle head.

[0006]

[Problems to be Solved by the Invention] USP No. 3,062,41
As disclosed in 6, in this type of push-type dispenser, the outflow passage for guiding the liquid pressurized in the cylinder to the nozzle of the nozzle head is continuous inside the piston and inside the nozzle (nozzle head). Is formed.

Liquids of relatively high viscosity such as shampoo, rinse, etc., are all nozzles under one reciprocation (one stroke) of the piston even if the liquid is pressurized in the cylinder by the lowering of the piston. It is not discharged from the outlet, but remains in the outlet in an amount substantially corresponding to the volume of the outlet at the rising position of the piston. Then, the liquid (residual liquid) left in the outflow passage of the nozzle and piston is pushed out to the liquid (pressurized liquid) that has flowed out of the cylinder through the secondary valve when the piston descends next time, and is ejected from the tip of the nozzle. To be leaked.

In the known dispenser, after the liquid in the cylinder flows out to the outflow passage through the secondary valve under the pressurization due to the downward movement of the piston which is interlocked with the pushing of the nozzle head, the secondary valve has its own weight or It is closed under the biasing force of the valve spring. Then, due to the negative pressure generated in the cylinder due to the rise of the piston from the pushing position, the primary valve is opened and the liquid in the container is sucked up into the cylinder. That is, after the liquid flows out of the cylinder, the secondary valve is closed immediately, so that the liquid in the outflow passage is left in the outflow passage without returning to the inside of the cylinder.

In a floating secondary valve without a valve spring, due to the relationship between the weight of the secondary valve and the viscosity and specific gravity of the liquid, the secondary valve is opened for a while even after the liquid has passed, and there is a delay. Will be closed. And during opening of this secondary valve,
The negative pressure in the cylinder acts to return the liquid (residual liquid) remaining in the outflow passage to the cylinder, so-called back suction occurs (for example, Japanese Patent Laid-Open No. 7-96956). However, the occurrence of back suction affects the self-weight of the secondary valve, the viscosity of the liquid, and the specific gravity, and back suction cannot be reliably generated.

Generally, in a push type dispenser, the tip of the nozzle is always open. If back suction does not occur, the tip of the residual liquid extends up to the vicinity of the tip of the nozzle, so that the residual liquid in the nozzle may drip from the tip of the nozzle, so-called liquid sag may occur. In particular, in a configuration in which the tip of the nozzle is inclined downward, liquid dripping is likely to occur.

Further, since the tip of the residual liquid extends to the vicinity of the nozzle tip and is in direct contact with the air, it is easy to dry and solidify, and the solidification of the residual liquid closes the tip of the nozzle to smooth the liquid from the nozzle tip. Disturb the outflow, dispenser
May be difficult to use.

The solid rod is extended from the cylinder into the piston, and the fact that the volume of the rod occupies the piston when the piston descends is smaller than when the piston descends. It is also known to generate a negative pressure inside (for example, Japanese Utility Model Publication No. 7-6110). With this configuration, the residual liquid in the outflow passage can be returned to the cylinder by the negative pressure generated in the piston when the piston moves up. However, a rod is required, the number of parts increases, and the rod must be fixed in the cylinder, which complicates the configuration.

It is an object of the present invention to provide a push type dispenser which ensures a back suction under a simple structure, prevents the liquid from remaining near the nozzle tip, and ensures a smooth outflow of the liquid. I am trying.

[0014]

In the conventional push type dispenser, the closing timing of the secondary valve after the liquid has flowed out from the cylinder affects uncertain factors such as the weight of the secondary valve, the viscosity of the liquid, and the specific gravity. However, it is not configured to automatically adjust the closing timing of the secondary valve.

In the present invention, paying attention to this point, the closing of the secondary valve is forcibly delayed with respect to the rise of the piston, and even if the piston starts to rise, the secondary valve remains open for a while. To be left alone. The primary valve is closed while the secondary valve is open, and the primary valve is opened after the secondary valve is closed.

As described above, in the structure in which the secondary valve is closed with a delay with respect to the rise of the piston, and the primary valve is opened with a delay with respect to the closure of the secondary valve, the piston rises to cause a phenomenon in the cylinder. The negative pressure functions to return the residual liquid in the outflow passage into the cylinder via the secondary valve before opening the primary valve. That is, back suction occurs.

For example, according to one embodiment of the present invention, the primary valve is formed in the shape of a rod extending into the piston, and the secondary valve is provided with a seal piece on the inner surface that is in sliding contact with the primary valve.
It is arranged and held around the primary valve in the piston so that it can be interlocked with the primary valve under the frictional force of sliding contact. A stopper is provided on the piston above the secondary valve so as to kick the secondary valve, release the interlocking with the primary valve, and allow the secondary valve to descend with the piston.

In this structure, at the pushed-in position of the nozzle head, that is, at the lowered position of the piston, the secondary valve is held by the primary valve while being separated from the valve seat, while the primary valve is held at the valve seat by the pressurized liquid. Pressed. That is, in the lowered position of the piston, the secondary valve is open and the primary valve is closed.
Then, even if the piston rises together with the nozzle head except for the pushing force to the nozzle head, the secondary valve remains open until the corresponding valve seat abuts the secondary valve,
After the valve seat abuts the secondary valve and the secondary valve is closed, the primary valve is opened and liquid flows into the cylinder.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, a push type dispenser 10 according to the present invention comprises a nozzle head 12, a cylinder 14 and a piston 16 which reciprocates in the cylinder. It is formed by integrally having a beak-shaped nozzle 12a. And dispenser
10 is a container by screwing a freely rotatable bottle cap 18
It is removably attached to the mouth portion 20a of 20 and sucks the liquid in the container into the cylinder due to the reciprocating motion of the piston 16 in the cylinder 14 and pressurizes the liquid in the cylinder ( The pressure fluid) is configured to flow out from the tip of the nozzle 12a of the nozzle head.

As the container 20 to which such a dispenser 10 is attached, soap and cosmetics for hair made of a liquid having a relatively high viscosity represented by shampoo, rinse, hand soap and the like are contained. In general, a container having a viscous food such as mayonnaise, ketchup and sauce can be exemplified. The container 20 is molded from plastic or glass.

As shown in FIG. 1, a piston 16 integrally having a skirt-shaped seal piece 16a slidably contacting the inner surface of the cylinder 14 on the outer surface of the lower end is arranged so as to be able to move up and down while slidably contacting the inside of the cylinder. There is. The skirt-shaped seal piece 16a is composed of a pair of seals extending upward and downward. By fixing the nozzle head 12 to the upper end of the piston, the piston and the nozzle head can be moved up and down integrally.

A liquid outflow passage 17 from the cylinder 14 is formed continuously inside the piston 16 and inside the nozzle head 12 (nozzle 12a).

The cylinder 14 is formed by being divided into a substantially cylindrical main body 14a having upper and lower ends opened and a bottomed valve base 14b fixed to the lower end of the main body. As shown in FIGS. 1 and 2, the valve base 14b has an outer flange at its lower end.
15, the outer flange functions as a stopper for fixing the valve base to the lower end of the cylinder body 14a.

In order to reduce the number of independent parts and simplify the structure, the suction tube 19 is provided with a valve base 14b.
Is integrally molded on the lower end of the suction tube,
It serves as an inflow passage 21 for the liquid from the container 20 to the cylinder 14.

As shown in FIG. 1, a return spring 22 made of, for example, a compression coil spring is arranged between the piston 16 and the stepped portion (spring seat) of the valve base 14b facing each other. The biasing force of the return spring 22 causes the piston-nozzle head 12 until the skirt-shaped seal piece 16a of the piston is engaged with the engaging piece 14a 'at the upper end of the cylinder 14.
Is pushed up, and this engagement position becomes the rising position (projection position, initial position) of the nozzle head. The nozzle head 12, cylinder 14, piston 16 excluding this return spring 22
All of the components of the dispenser 10 and the like are molded from plastic in consideration of recycling.

In this structure, if the nozzle head 12 is pushed against the biasing force of the return spring 22, the piston 16 descends inside the cylinder 14 in conjunction with the pushing of the nozzle head (see FIG. 3). . Except for the pushing force to the nozzle head 12 after pushing the piston, the piston 16 becomes the return spring 22.
Biasing force causes the nozzle head 12 to return to its raised position shown in FIG. 1 and stand by. That is, the piston performs a so-called pumping action by reciprocating between the raised position of FIG. 1 and the pushed-in position (lowered position) of FIG.

The bottle cap 18 is screwed to the container mouth while sandwiching the packing 28 and the flange 14a "of the cylinder 14 between the bottle cap 18 and the container mouth 20a, whereby the dispenser 10 is filled with the liquid in the container 20. It is densely and detachably attached.

A ventilation hole (negative pressure prevention hole) 30 for preventing a negative pressure in the container due to the inflow (suction) of the liquid from the container 20 into the cylinder 14 is formed in the side wall of the cylinder 14. . One or two ventilation holes (negative pressure prevention holes) 30 are provided.

In this type of dispenser 10, a primary valve 32 for controlling the flow of liquid in the inflow passage 21 and a secondary valve 34 for controlling the flow of liquid in the outflow passage 17 are arranged. .

For example, as shown in FIG. 1, in the embodiment of the present invention, the base opening of the valve base 14b is tapered, and the valve seat 36 is formed from the tapered surface.
The primary valve 32 is on the valve seat and the valve base 14b
Built in 14. Further, the lower end of the piston 16 is formed into a taper shape, and a valve seat 38 is formed from the taper surface, so that the secondary valve
34 is built into the piston on the valve seat.

As can be seen from FIG. 1, in the present invention, the primary valve 32 is formed in a rod shape integrally having a rod 32a having a length that allows insertion from the lower end of the piston 16 into the piston. There is. On the other hand, the secondary valve 34 is formed in a cylindrical shape having a seal piece 34a on its inner surface, and the seal piece is brought into sliding contact with the outer surface of the rod 32a of the primary valve 32 to generate a frictional force due to the sliding contact. It is possible to move up and down together with the primary valve.
That is, the secondary valve is arranged and held around the primary valve so as to be interlocked. Of course, the sliding contact between the rod 32a and the seal piece 34a ensures liquid tightness between the secondary valve and the rod.

In the illustrated embodiment, the seal pieces 34a have a ring shape, and two seal pieces 34a are vertically separated from each other. However, the seal piece 34a is sufficient as long as it produces a frictional force that ensures the lifting and lowering of the primary valve 32 and the secondary valve 34 integrally, and the seal piece is like the seal piece 16a at the lower end of the piston. It may be in the shape of a skirt and the number thereof is not limited to two.

The primary valve 32 and the secondary valve 34 are formed by integrally including a plurality of plate-shaped guide pieces 32b, 34b extending in the radial direction conformally, and the guide pieces form a valve seat 36, The fall of 38 is prevented. In addition, the stopper 40 is
A stopper 42 is formed on the inner surface of the valve base 14b above 36, and on the inner surface of the piston 16 above the valve seat 38.
The upper primary valve 32 and the secondary valve 34 are prevented from coming off. In addition, the stopper 40 for preventing the separation of the primary valve is
Also serves as a spring seat.

As will be described later, when the piston 16 descends, the secondary valve disengagement prevention stopper 42 kicks the secondary valve 34 to release the secondary lowering of the secondary valve 34 to release the secondary valve. Lower with piston.

In the present invention, the seal piece 34a is brought into sliding contact with the primary valve 32, and the secondary valve 34 is arranged and held around the rod 32a of the primary valve 32. That is, the piston of FIG.
When the nozzle head 12 is pushed against the biasing force of the return spring 22 at the 16 raised position (initial position), the piston 42 stops until the stopper 42 on the inner surface of the piston abuts the guide piece 34b of the secondary valve and kicks. 16 descends alone without the secondary valve.

However, the stopper 42 serves as the guide piece 34 for the secondary valve.
When abutting and kicking against b, the secondary valve 34 is released from the interlocking with the primary valve 32 and can descend regardless of the primary valve. Then, the piston 16 descends along with the secondary valve while sliding the secondary valve 34 to the rod 32a of the primary valve 32, and reaches the pushing position (lowering position) shown in FIG.

As described above, in the present invention, the secondary valve 34 starts descending later than the piston 16, and immediately after the start of pushing of the nozzle head 12, the piston descends independently without the secondary valve.

The piston is moved to the pushing position shown in FIG.
After lowering 16, the pushing force to the nozzle head 12 is removed, and the biasing force of the return spring 22 causes the nozzle head to rise together with the piston 16. Here, until the valve seat 38 at the lower end of the piston contacts the lower end of the secondary valve 34, the piston 16
Independently rises without the secondary valve 34, and when the valve seat abuts the secondary valve, the piston rises with the secondary valve. That is, the secondary valve 34 is not closed when the piston 16 starts to rise, and the secondary valve is kept open until the valve seat 38 contacts the secondary valve 34, and is closed after the piston starts to rise. .

In the known pump dispenser,
Pushing (lowering) and raising of the piston both occur at substantially the same time as the opening and closing of the secondary valve. On the other hand, in the present invention, the opening of the secondary valve occurs substantially simultaneously with the lowering of the piston, as in the conventional case. However, the closing of the secondary valve occurs after the piston starts to rise.

That is, the raised position (initial position) shown in FIG.
When the nozzle head 12 and the piston 16 are pushed in from, the primary valve 32 is immediately brought into close contact with the valve seat 36 and closed due to the pressurization of the liquid in the cylinder 14. Here, even when the piston 16 descends, the secondary valve 34 is held by the primary valve 32 and stays at that position and does not descend, so the secondary valve is opened substantially at the same time as the piston descends.

When the stopper 42 on the inner surface of the piston kicks the guide piece 34b of the secondary valve 34, the piston 16 descends with the secondary valve while sliding the seal piece of the secondary valve to the primary valve 32. Then, the liquid in the cylinder is pressurized. In this way, since the secondary valve 34 is opened and the piston 16 descends, the pressurized liquid flows out to the outflow passage 17 through the secondary valve, and the liquid remaining in the outflow passage 17 in the previous stroke is removed. While being pushed out from the nozzle 12a, part of the pressurized liquid in this stroke also flows out from the tip of the nozzle, and the remaining pressurized liquid fills the outflow passage and remains.

As described above, according to the present invention, the piston 16
Until the valve seat 38 comes into contact with the secondary valve 34 after the start of the upward movement of the piston, the piston is advanced in advance, and the closing of the secondary valve is delayed by the preceding rising time of the piston. Therefore, at the time corresponding to the delay time, the residual liquid in the piston is returned to the cylinder via the secondary valve 34 by the negative pressure generated in the cylinder 14 due to the rise of the piston 16.

When the valve seat 38 comes into contact with the secondary valve 34 after the delay time has elapsed, the secondary valve is closed. Then, when the piston 16 moves up with the closed secondary valve 34, the negative pressure generated in the cylinder 24 opens the primary valve 32 away from the valve seat 36, and the liquid in the container 20 is sucked. It is sucked up into the cylinder 14 through the valve 19 and the primary valve 32 (Fig. 1
reference).

That is, in the present invention, the nozzle head 12,
When the piston 16 starts to move up, a so-called "back suction" occurs in which a part of the residual liquid in the outflow passage 17 flows back into the cylinder 14 prior to the suction of the liquid from the container 20. This back flow of the residual liquid (back suction) causes the residual liquid tip to retract from the tip of the nozzle 12a,
It is possible to prevent the tip of the residual liquid from directly contacting the atmosphere. Therefore, the liquid (residual liquid) is prevented from being dried and solidified, and the liquid can smoothly flow out.

Further, since the tip of the residual liquid is not near the tip of the nozzle 12a, it is possible to prevent leakage of the liquid from the nozzle, so-called liquid dripping. In particular, as shown in FIG. 1, if the nozzle 12a is formed in a substantially mountain shape that is inclined upward from the base portion to the central portion and is inclined downward from the central portion to the tip portion, By dripping the tip of the residual liquid backward (to the right), liquid dripping can be reliably prevented.

In the present invention, the closing of the secondary valve 34 at the start of the piston ascending is forcibly delayed, so that it is not affected by factors such as the weight of the secondary valve, the viscosity of the liquid, and the specific gravity. , The back suction surely occurs.

Further, the primary valve 32 has a rod shape, and a secondary valve 34 is arranged around the primary valve so that the secondary valve is held by the primary valve under the frictional force. In this configuration, the nozzle head
The operation timing in which the secondary valve 34 is closed after the rising of 12 and the primary valve is opened after the closing of the secondary valve is obtained with a simple configuration.

When the nozzle head 12 shown in FIG.
The tip of the rod 32a of the primary valve 32 is located inside the piston 16 at any of the pushing times shown in FIG. However, as can be seen by comparing FIGS. 1 and 3, when the nozzle head 12 of FIG. 1 is raised, the volume occupied by the primary valve 32 in the piston is reduced as compared with when it is pushed in of FIG. ing.

In this configuration in which the upper half of the primary valve 32 is located inside the piston 16, when the nozzle head 12 rises, the piston 16
Since the volume occupied by the primary valve 32 therein is reduced, a negative pressure is generated in the piston, and this negative pressure causes the residual liquid in the nozzle 12a to return to the piston 16. That is, in addition to the back suction due to the delay in closing the secondary valve 34, the back suction also occurs due to the reduction of the volume occupied by the primary valve 32 in the piston.

In the present invention, since the upper half of the rod-shaped primary valve 32 is extended to the inside of the piston 16, an independent member for generating negative pressure in the piston is not required, and the inside of the cylinder 14 is not required. The negative pressure pushes the primary valve 32 against the valve seat 36,
It is fixed, does not require any special structure for fixing, and does not complicate the structure.

This type of push type dispenser-10
In FIG. 3, a male screw 44 is formed on the outer surface of the nozzle head 12 integrated with the piston 16, and a corresponding female screw 46 is formed on the inner surface of the upper end of the cylinder 14. Cylinder 14 shown in FIG.
When the nozzle head 12 is pushed further from the pushing position of the piston 16 for sucking up and pressurizing the liquid into the cylinder, and the male screw 44 of the nozzle head is brought into contact with the female screw 46 of the cylinder, the nozzle head is rotated. As shown in FIG. 4, the screw head and the female screw are screwed together, and the nozzle head is fixed at its lowest position. Therefore, the height of the dispenser 10 itself, that is, the overall height of the combination of the dispenser 10 and the container 20 is reduced, and the space required for transportation and exhibition is reduced.
The size can be reduced.

In the dispenser 10 of the present invention,
A valve retainer 48 that presses the upper end of the primary valve 32 to hold the primary valve in the closed position while the nozzle head 12 is fixed at the lowest position (fixed position) is integrally hung on the top of the nozzle head. ing. The valve retainer 48 is elastically deformable in the radial direction by being formed equiangularly with a plurality of axial slits 50 that are open at the lower end. Therefore, the lower end with the slit expands outward in the radial direction, whereby the valve retainer 48 can elastically hold the upper end of the primary valve 32.

In this structure, when the nozzle head 12 is fixed at the lowest position shown in FIG.
This forces the primary valve 32 to remain in the closed position.
Therefore, unexpected opening of the primary valve 32 during transportation of the dispenser 10 and display of the dispenser 10 is prevented, and liquid outflow (liquid leakage) is prevented.

Due to its elasticity, the valve retainer 48 can change the holding position of the primary valve 32 by expanding the distal end of the valve retainer radially outward. Therefore, even if a molding error or an assembly error occurs in the constituent members such as the primary valve 32 in the height direction (axial direction),
Under the fluctuation of the holding position of the primary valve due to the expansion of the valve retainer 48, the molding error and the assembly error can be absorbed, and the primary valve can be reliably held in the closed position.

In the embodiment of the present invention, a plurality of slits 50 are equiangularly provided, but it is sufficient if the valve retainer 48 has elasticity so that it can be expanded outward in the radial direction. . Therefore, the present invention is not limited to this, and the valve retainer 48 may be provided with one slit, for example.

When the nozzle head 12 is pushed to the lowermost position, the valve retainer 48 only needs to close and close the primary valve 32 to the valve seat 36, and is not limited to the illustrated configuration in which it is suspended from the top of the nozzle head. , For example, as shown in FIG.
A valve retainer may be provided at the lower end of the.

For example, the rod-shaped primary valve 32 has a large diameter portion 52 in the middle thereof, and the valve retainer 148 at the lower end of the piston 16 is provided.
Is formed with an axial slit 150 having an opening at the lower end. Also in this configuration, when the nozzle head 12 is pushed to the lowest position, the valve retainer 148 can reliably hold the primary valve 32 in the closed position, and the dispenser 10 can be conveyed,
Unexpected liquid leakage at the time of exhibition is reliably prevented. Of course, since the valve retainer 148 has elasticity, the primary valve in the height direction
It is possible to absorb molding and assembly errors of components such as 32.

At least one slit 150 for the valve retainer is sufficient. However, in this structure, a plurality of slits 150 having a sufficient width to function as flow paths are conformally formed so that the valve retainer 148 at the lower end of the piston does not obstruct the flow of the liquid flowing into the piston at the lower end of the piston 16. It is better to form it.

The shape of the large-diameter portion 52 of the primary valve 32 is not limited to the local shape shown in FIG. 5, and for example, as shown in FIG. 6, the entire lower half of the rod-shaped primary valve 32 is enlarged. It may be a diameter portion. As described above, if the lower half portion of the primary valve 32 is the large diameter portion 152, the mold for molding the primary valve 32 is structurally simplified and the cost is reduced.

Further, as shown in FIGS. 1 and 2, in the dispenser 10 of the present invention, a plurality of axial slits 54, which are opened at the ends, are formed at the upper end of the cylinder 14 provided with the internal thread 46. It is formed angularly.

With this structure, the upper end of the cylinder 14 provided with the internal thread 46 can be expanded outward in the radial direction under elastic deformation. Therefore, in the injection molding of the cylinder 14, the screw core for molding the female screw in the cylinder can be pulled out and removed without rotating. Therefore, the cylinder molding die can be structurally simplified, the cost can be reduced, and the cylinder can be molded quickly.

In the structure in which the upper end of the cylinder 14 is elastically deformable by providing the slit 54, even if the male screw 44 and the female screw 46 are screwed together, if the nozzle head 12 is forcibly pulled up,
There is a risk that the upper end of the cylinder will be expanded radially outward and the screwing between the screw and the female screw will be released.

However, as shown in FIG. 1, in the dispenser 10 of the present invention, the cylinder cap 56 is locked to the upper end of the cylinder 14 before the assembly of the dispenser into the container 20 and is radially outward. It prevents the upper end of the cylinder from expanding toward one side. Therefore, the male screw 44 and the female screw 46 are not released from each other.

In the illustrated embodiment, corresponding hooks are formed on the cylinder cap 56 and the cylinder 14, and the engagement of these hooks locks the cylinder cap to the cylinder. However, the locking means is not limited to this, and may have another configuration, for example, a combination of a locking groove and a locking projection.

In the embodiment of the present invention shown in FIGS. 1 to 6, the secondary valve 34 is arranged around the primary valve 32 so that the primary valve and the secondary valve can be interlocked with each other under frictional force. , The time delay from the closing of the secondary valve to the opening of the primary valve at the start of rising of the nozzle head 12 is obtained. However, the configuration is not limited to the configuration in which the secondary valve 34 is arranged around the primary valve 32. For example, as in the push type dispenser 110 according to another embodiment of the present invention shown in FIGS.
2. The opposing ends of the secondary valve 134 may be brought into contact with each other, and the primary valve may be kicked and pushed up by the primary valve so that the primary valve and the secondary valve can be interlocked.

As shown in FIG. 7, this dispenser-11
Also in 0, as in the embodiment of FIGS. 1 to 6, the primary valve 132 is formed into a rod shape having a rod 132a,
It is arranged inside the cylinder 14 so that the flow of the liquid in the inflow path 21 can be controlled. The secondary valve 134 is arranged inside the piston 16 so as to control the flow of the liquid in the outflow passage 17.

In this embodiment shown in FIGS. 7 to 9, the secondary valve 134 can be brought into close contact with the valve seat 38 under the biasing force of the valve spring 55, that is, can be closed. As the valve spring 55, for example, a corrugated compression spring that is integrally molded with the secondary valve 134 and that extends upward from the upper end of the secondary valve can be used. The upper end of the compression spring is a flat stopper. , Is in contact with the top of the nozzle head 12.

On the other hand, the rod 132a of the primary valve 132 has a diameter that allows it to be inserted into the piston 16, and as shown in FIG. Abut the lower end, push up the secondary valve,
It is formed to have an open length.

The primary valve 132 and the secondary valve 134 are formed integrally with the plate-shaped guide pieces 132b and 134b extending in the radial direction. Then, the valve base is placed above the guide piece 132b.
The stopper 40 formed on the inner surface of the sleeve 14b prevents the primary valve 132 from being disengaged upward. However, the secondary valve 13
Since the valve spring 4 receives the biasing force in the valve seat direction by the valve spring 55, the stopper for preventing the separation of the secondary valve can be omitted.

In this push type dispenser 110, as shown in FIG. 8, at the pushing position of the nozzle 12, that is, at the lowered position of the piston 16, the upper end of the primary valve 132 kicks the lower end of the secondary valve 134, and The next valve is opened.

When the piston 16 is lifted by the biasing force of the return spring 22 except for the pushing force to the nozzle 12, first, the piston is operated until the valve seat 38 contacts the secondary valve 134.
Rise alone without secondary valve. Then the seat
When 38 abuts the secondary valve 134, the secondary valve is closed and the piston moves up with the secondary valve.

When the piston 16 alone moves up,
The primary valve 132 is seated on the valve seat 36 by the biasing force of the valve spring 55 of the secondary valve.
The primary valve does not open because it is pressed by.

However, when the secondary valve 134 rises together with the piston 16, the secondary valve is separated from the primary valve 132, and the biasing force from the valve spring 55 of the secondary valve to the primary valve 132 is released. Then, when the piston 16 further rises with the secondary valve 134, the negative pressure in the cylinder causes the primary valve 132 to separate from the valve seat 36 and open.

As described above, also in the push type dispenser 110 of this embodiment, the secondary valve 134 is closed after the piston 16 is raised, and the secondary valve is linked with the piston after the secondary valve is closed. If it does not rise, primary valve 132
Is not released. Therefore, the primary valve 132 is opened later than the closing of the secondary valve.

Therefore, also in this configuration, the outflow passage 17 is opened under the closing of the secondary valve 134 delayed from the start of the rising of the nozzle head 12 and the opening of the primary valve 132 delayed further from the closing of the secondary valve. A backflow of liquid from the cylinder 14 to the cylinder 14 (back suction) is reliably obtained. Therefore, solidification of the liquid at the tip of the nozzle 12a is prevented, and a smooth flow of the liquid from the nozzle is secured.

Further, when the nozzle head 12 starts to move up, the piston 16 is moved up prior to the closing of the secondary valve 134, and the primary valve 132 is opened after closing the secondary valve. It can be obtained with.

As shown in FIG. 9, for example, the male screw 44,
If the nozzle head 12 is fixed at the lowest position under the engagement of the female screw 46, the biasing force of the valve spring 55 is transmitted to the primary valve 132 via the secondary valve 134 and the primary valve to the valve seat 36. Close and close.

Also in this structure, by fixing the nozzle head 12 at the lowest position, the space required for transportation and exhibition can be made sufficiently small, and the primary valve 132 is fixed at the closed position. It is possible to reliably prevent the outflow of liquid during transportation and exhibition.

If the space for transportation and exhibition is not considered so much, the nozzle head 12 may be fixed at the initial position (raised position).

For example, a cylindrical stopper 62 with a notch
As shown in Fig. 10 (A), if the lower part of the nozzle head is fitted between the nozzle head 12 and the cylinder stopper 56 as shown in Fig. 10 (A), the nozzle head is prevented from descending and the nozzle The head is fixed at the initial position to prevent the liquid from flowing out during transportation and exhibition. Of course, in this configuration, the male screw 44 of the nozzle head and the female screw 46 of the cylinder are unnecessary.

Further, a chaplet 64 may be fixed to the upper end of the cylinder instead of the cylinder stopper 56, and the descent of the nozzle head 12 may be restricted by this chaplet.

For example, the chaplet 64 has a pair of protrusions 65.
Is provided on the inner surface (see FIG. 11 (B)), and a pair of guide grooves 66 through which the protrusions can be inserted are formed on the outer surface of the piston 16 as shown in FIG. 11 (A). The guide groove 66 is formed in an L shape having a horizontal portion at the lower end of the vertical portion.

In this structure, if the protrusion 65 is located in the vertical portion of the guide groove 66, the nozzle head 12 can freely move up and down.
However, if the nozzle head is rotated at the raised position (initial position) of the nozzle head 12 and the projection 65 is guided to the horizontal portion of the guide groove 66, the nozzle head cannot be lowered and is fixed. That is, the nozzle head 12 is fixed at the initial position, and the liquid can be prevented from flowing out during transportation and display.

Contrary to the drawing, if the guide groove 66 is formed in an inverted L shape having a horizontal portion at the upper end of the vertical portion, the nozzle head 12 is lowered until the protrusion 65 contacts the upper end of the vertical portion, and then the nozzle head The nozzle head is fixed at the lowered position as in the embodiment shown in FIGS. 1 to 6 by rotating the to guide the protrusion to the horizontal portion.

[0086]

As described above, according to the push type dispenser according to the present invention, the secondary type is delayed from the start of the rising of the nozzle head without being influenced by the weight of the secondary valve, the viscosity of the liquid, and the specific gravity. The valve is closed and the primary valve is opened after the closing of the secondary valve. Therefore, the negative pressure generated in the cylinder due to the rise of the nozzle head causes the residual liquid in the outflow passage to flow back into the cylinder. That is, prior to the suction of the liquid from the container to the cylinder, the back suction reliably returns the residual liquid in the outflow passage to the cylinder regardless of the characteristics of the liquid itself such as the viscosity and the specific gravity of the liquid.

Therefore, the tip of the residual liquid recedes from the vicinity of the tip of the nozzle, direct contact between the residual liquid and air at the tip of the nozzle is avoided, and the liquid is dried due to the direct contact with air.
Solidification is prevented and a smooth outflow of liquid is ensured.

Further, liquid dripping from the nozzle is prevented.
In particular, in the configuration in which the nozzle is formed in a substantially mountain shape with the central portion raised, the tip of the residual liquid can be retracted rearward from the central portion of the nozzle, and liquid dripping can be reliably prevented.

Further, since the primary valve is rod-shaped and the secondary valve is arranged around the rod-shaped primary valve so that the secondary valve can be held in the open position, the secondary valve at the time of starting the rising of the nozzle head. The operational timing of ensuring the piston rise prior to valve closing and opening the primary valve after closing the secondary valve is obtained with a simple construction.

If the seal piece provided on the inner surface of the secondary valve is brought into sliding contact with the primary valve, the primary valve and the secondary valve can be interlocked without complicating the structure.

The secondary valve is brought into close contact with the valve seat by the biasing force of the valve spring,
When the piston descends, the primary valve kicks the secondary valve,
Even in the configuration in which the secondary valve is opened by separating it from the valve seat,
Similar operation timing can be obtained with a simple configuration.

The height of the dispenser can be reduced by fixing the nozzle head in the pushed-in position by screwing the corresponding male and female threads, and by closely contacting and closing the primary valve with the valve seat with the valve retainer. In addition, the space required for transportation and exhibition can be reduced, and liquid can be prevented from flowing out during transportation and exhibition. The valve retainer is provided on the top of the nozzle head or the lower end of the piston.

If the valve retainer is provided with a slit in the axial direction so that the valve retainer can be elastically deformed, the holding position of the primary valve by the valve retainer can be adjusted, and molding errors and assembly errors of the component members in the height direction can be prevented. Since it is absorbed, the primary valve can be reliably held in the closed position.

If a plurality of axial slits that open at the ends are equiangularly provided at the upper end of the cylinder having the female thread formed therein so that the upper end of the cylinder is elastically deformable, the core for forming the female thread becomes Can be pulled out and removed without rotation. Therefore, the cylinder can be easily molded, and the die for cylinder molding can be structurally simplified.

[Brief description of drawings]

FIG. 1 shows a nozzle head in a raised position (initial position),
It is a schematic longitudinal cross-sectional view of a push type dispenser according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a cylinder.

FIG. 3 is a schematic vertical sectional view of a push type dispenser according to an embodiment of the present invention in which a nozzle head is in a lowered position.

FIG. 4 is a schematic vertical cross-sectional view of a push type dispenser according to an embodiment of the present invention, in which a nozzle head is fixed at a lowermost position.

FIG. 5 is a schematic vertical cross-sectional view of a modification of the push-type dispenser according to the embodiment of the present invention, in which the nozzle head is fixed at the lowest position.

FIG. 6 is a schematic vertical cross-sectional view of another modification of the push-type dispenser according to the embodiment of the present invention, in which the nozzle head is fixed at the lowest position.

FIG. 7 is a schematic vertical cross-sectional view of a push type dispenser according to another embodiment of the present invention in which the nozzle head is in a raised position.

FIG. 8 is a schematic vertical cross-sectional view of a push type dispenser according to another embodiment of the present invention in which the nozzle head is in the lowered position.

FIG. 9 is a schematic vertical cross-sectional view of a push-type dispenser according to another embodiment of the present invention, in which the nozzle head is fixed at the lowest position.

FIG. 10A is a partially cutaway front view of a modification of the push-type dispenser according to another embodiment of the present invention, in which the nozzle head is fixed at the initial position (raised position).
(B) is a perspective view of a stopper used in this modification.

FIG. 11A is a partially cutaway front view of another modification of the push-type dispenser according to another embodiment of the present invention, in which the nozzle head is fixed at the initial position (elevated position); FIG. 8 is a perspective view of a chaplet used in this another modified example.

[Explanation of symbols]

 10, 110 Push type dispenser 12 Nozzle head 12a Nozzle 14 Cylinder 14a Cylinder rod 14b Valve base 16 Piston 17 Outflow passage 18 Bottle cap 19 Suction tube 20 Container 20a Container opening 21 Inlet passage 32, 132 Primary valve 34, 134 Secondary valve 36 Valve seat for primary valve 38 Valve seat for secondary valve 40 Stopper for primary valve 42 Stopper for secondary valve 44 Male screw on outer surface of nozzle head 46 Female screw on inner surface of cylinder 48, 148 Valve for primary valve Presser foot 50, 150 Valve presser slit 52, 152 Primary valve large diameter portion 54 Cylinder upper end slit 55 Secondary valve valve spring 58 Piston lower end valve presser 60 Valve presser slit

Claims (12)

[Claims] Claim: What is claimed is: 1. A cylinder, a bottle cap for mounting the cylinder on an opening of a container containing a liquid, and a suction tube provided at a lower end of the cylinder for defining an inflow passage of the liquid into the cylinder therein. And a primary valve that is arranged in the cylinder and controls the flow of liquid that flows from the container to the cylinder through the suction tube, and reciprocates in the cylinder while sliding to make the liquid in the container the primary valve. The piston that sucks up and pressurizes it into the cylinder through it, the return spring that biases the piston upward, and the beak-shaped nozzle are integrally molded and fixed to the upper end of the piston to be integrated with the piston. A nozzle head that is pushed against the biasing force of the return spring, a secondary valve that controls the flow of liquid that flows from the cylinder to the outflow passage defined inside the piston and nozzle, The primary valve is formed integrally with a rod extending in the piston, the secondary valve is disposed in the piston so as to be interlockable with the primary valve, kicks the secondary valve, and A stopper that releases the secondary valve together with the piston by releasing the interlock is provided on the piston above the secondary valve, and when the nozzle head rises with the piston due to the biasing force of the return spring, the piston rises. A push-type dispenser that allows the residual liquid in the outflow passage to be back-suctioned into the cylinder by blocking the opening of the primary valve before closing the secondary valve with a later delay. 2. A liquid in a container is sucked up into a cylinder through a suction tube and a primary valve by reciprocating movement of a piston which is attached to a mouth of a container containing a liquid and which is interlocked with pushing of a nozzle head, In a push-type dispenser that pressurizes and flows out of the nozzle of the nozzle head through the secondary valve, the primary valve is formed into a rod shape extending into the piston, and the secondary valve is arranged inside the piston so as to be interlockable with the primary valve. A stopper is provided to kick the secondary valve, release the interlocking with the primary valve, and allow the secondary valve to descend with the piston.The stopper is provided on the piston above the secondary valve, and when the nozzle head rises, the piston The secondary valve closes after the rise of the valve and the opening of the primary valve before the secondary valve is closed prevents the residual liquid in the nozzle and piston from being back-suctioned to the cylinder. Push type dispenser, characterized in that the the -. 3. The secondary valve is provided with a seal piece on the inner surface, which is in sliding contact with the primary valve, and is arranged and held around the primary valve so as to be able to move up and down integrally with the primary valve under the frictional force of the sliding contact. The push type dispenser according to claim 1 or 2. 4. A female thread is formed on the inner surface of the upper end of the cylinder,
A male screw that meshes with this female screw is formed on the inner surface of the nozzle head, and by engaging the female screw and the male screw, the nozzle head can be fixed to the cylinder at the lowest position of the nozzle head, and at the lowest position of the nozzle head. 4. The push type dispenser according to claim 3, wherein the primary valve is pressed against the valve seat by the valve retainer to be closed. 5. The valve retainer is formed at the top of the nozzle head, extends downward, and has at least one slit in the axial direction at its lower end so as to be elastically deformable in the radial direction. Push type dispenser. 6. The primary valve has a large diameter portion in the middle thereof, and the valve retainer abuts against the large diameter portion of the primary valve at the lowest position of the nozzle head so as to press the primary valve against the valve seat. 5. The push-type dispenser according to claim 4, wherein the push-type dispenser extends downward from the lower end and has at least one slit in the axial direction so as to be elastically deformable in the radial direction. 7. The lower half of the primary valve is a hollow large-diameter portion with an opening at the lower end, and the valve retainer abuts the large-diameter portion of the primary valve at the lowest position of the nozzle head to seat the primary valve on the valve seat. 5. The push-type dispenser according to claim 4, wherein the push-type dispenser extends downward from the lower end of the piston so as to be able to be pressed against and has at least one slit in the axial direction so as to be elastically deformable in the radial direction. 8. The liquid in the container is sucked up into a cylinder through a suction tube and a primary valve by reciprocating movement of a piston which is attached to the mouth of the container containing the liquid and which is interlocked with pushing of a nozzle head. In a push type dispenser that pressurizes and flows out of a nozzle of a nozzle head through a secondary valve, a valve spring that biases a secondary valve in a piston to its valve seat is arranged in a liquid outflow passage from a cylinder. , When pushing the nozzle head to lower the piston,
The primary valve is formed with a rod that kicks the secondary valve that descends with the piston and resists the biasing force of the valve spring to separate the secondary valve from the valve seat, and the biasing force of the valve spring of the secondary valve is It is transmitted to the rod to push the primary valve against the valve seat to close it, and when the piston rises, the secondary valve is opened under the kick of the rod of the primary valve until the corresponding valve seat abuts. Push type characterized in that the secondary valve closes after the piston starts to rise and it prevents the opening of the primary valve before the secondary valve closes, allowing the residual liquid in the nozzle and piston to be back-suctioned to the cylinder. Dispenser. 9. The valve spring is integrally molded with a secondary valve from plastic, and a female screw is formed on the inner surface of the upper end of the cylinder, and a male screw meshing with the female screw is formed on the inner surface of the nozzle head. 9. The push type dispenser according to claim 8, wherein the nozzle head can be fixed to the cylinder at the lowest position of the nozzle head by the engagement of the internal thread and the external thread. 10. A cylinder, a bottle cap for mounting the cylinder on an opening of a container containing a liquid, and a suction tube provided at a lower end of the cylinder for defining an inflow passage of the liquid into the cylinder therein. And a primary valve that is arranged in the cylinder and controls the flow of liquid that flows from the container to the cylinder through the suction tube, and reciprocates in the cylinder while sliding to make the liquid in the container the primary valve. It is molded by integrally incorporating a piston that sucks up and pressurizes it into the cylinder, a return spring that biases the piston upward, and a beak-shaped nozzle, and is fixed to the upper end of the piston to be integrated with the piston. Controls the flow of liquid from the nozzle head, which is pushed against the biasing force of the return spring, and from the cylinder to the outflow passage defined inside the piston and nozzle cap. A secondary valve and a valve spring disposed in the outflow passage and biasing the secondary valve to its valve seat; and when pushing the nozzle head against the biasing force of the return spring to lower the piston, The primary valve is formed with the rod that kicks the secondary valve and separates the secondary valve from the valve seat against the biasing force of the valve spring, and the biasing force of the secondary valve spring is transmitted to the rod. The primary valve is pressed against the valve seat to close it, and when the nozzle head rises, the secondary valve closes after the piston rises, and by preventing the opening of the primary valve before closing the secondary valve, A push-type dispenser characterized in that the residual liquid in the nozzle head and piston can be back-suctioned to the cylinder. 11. A plurality of axial slits opened at the end are conformally formed at the upper end of the cylinder to make the upper end of the cylinder elastically deformable in the radial direction, and the stop cap is locked to the upper end of the cylinder. The push-type dispenser according to any one of claims 5 to 7, which prevents the upper end of the cylinder from expanding in the radial direction. 12. The push according to claim 1, wherein the nozzle of the nozzle head is formed in a substantially mountain shape that is inclined upward from the base portion to the central portion and is inclined downward from the central portion to the tip portion. Type dispenser.