JPH0531410A - Push type dispenser and primary valve - Google Patents

Abstract

PURPOSE:To prevent a liquid from leaking out through a primary valve, even if the dispenser is laid down or inclined, when a nozzle head is not locked. CONSTITUTION:A primary valve 46 formed from plastic is provided integrally with a cylindrical valve body 48 and a flare body 50 which extends in a flare shape to the outside of the valve body 48 and generates elasticity. The flare body 50 is provided with a flange 50a in the end, and this flange 50a is pressed against the wall surface 47a of a valve seat under elasticity of the flare body 50 and closes the primary valve 46. When a liquid passes through a suction tube 44 and ascends by conversion to negative pressure of a cylinder 12, the liquid works on the flare body 50 through a flow passage 52a of the valve body and an insert-through hole of the valve seat, the flare body 50 is bent, the flange 50a is separated from the wall surface 47a of the valve seat and the primary valve 46 is opened.

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 which is attached to the mouth of a container and which sucks and pressurizes the liquid in the container into a cylinder by sliding a piston which interlocks with the pushing of a nozzle head. -And its primary valve.

[0002]

2. Description of the Related Art Generally, push type dispensers
In, the cylinder is attached to the mouth of the container by the bottle cap, and when the nozzle head (also called push button) with the piston attached to the lower end is pushed in, the piston slides in the cylinder and the liquid in the container is removed. It is sucked and pressurized into the pressure chamber of the cylinder to flow out.

A suction tube is attached to the lower end of the cylinder, and an inflow passage communicating with the suction tube is formed in the lower end of the cylinder. In addition, an outflow passage that connects the outlet provided in the nozzle head to the pressure chamber is formed from the piston to the nozzle head. And
A primary valve that controls the flow of liquid from the container to the cylinder is in the inflow passage at the lower end of the cylinder, and a secondary valve that controls the flow of pressurized liquid from the cylinder to the outlet is in the outflow passage of the piston or nozzle head. It is provided.

A return spring such as a compression coil spring is disposed in the cylinder to bias the nozzle head together with the piston outward, and the nozzle head is projected to the outer position (projection position). When the nozzle head is pushed against the biasing force of the return spring, the piston slides inside the piston, and the distance between the protruding position and the pushing position of the nozzle head becomes the stroke of the piston.

Generally, this type of dispenser is transported with the cylinder attached to the mouth of the container in which the liquid to be discharged is held by the bottle cap, and is displayed in the store.
As a primary valve of push type dispenser,
A steel ball is adopted, and the primary valve (steel ball) is pressed against the valve seat by its own weight and closed. Therefore, the liquid in the container does not leak out through the primary valve as long as it remains in a substantially vertical state.

Further, since the piston slides in association with the pushing of the nozzle head to let out the liquid, it is necessary to prevent unnecessary pushing of the nozzle head during transportation and during exhibition so as to prevent the liquid from leaking. is there.

Therefore, the dispenser is configured to lock the nozzle head together with the piston in the push-in position, thereby preventing unexpected push-in of the nozzle head due to carelessness or tipping over, and indirectly preventing sliding of the piston. Then, leakage of the liquid is prevented.

If the nozzle head is locked in its pushed-in position, the dispenser can be miniaturized by the amount corresponding to the stroke of the piston and can be packaged in a small size, and the exhibition space can be reduced for efficient transportation and exhibition. It will be possible.

When the dispenser is tilted, the primary valve made of steel balls may be separated from the valve seat and opened. Therefore, when the nozzle head is locked at the push-in position, a structure is known in which the primary valve is forcibly pressed against the valve seat and locked by a valve retainer that is integral with or separate from the piston (for example, Japanese Patent Publication No. 63-010305). No. 60-040899).

With this configuration, it is not necessary to maintain the dispenser substantially vertically, and the packing posture during transportation can be freely set. Further, the liquid leakage can be surely prevented by the double lock by the lock of the nozzle head and the lock of the primary valve.

[0011]

However, when the dispenser is inadvertently tilted or tilted while the nozzle head is not locked while the dispenser is in use, the primary valve (steel ball) opens away from the valve seat, and the inside of the container is opened. Liquid leaks through the primary valve immediately. Therefore, in order to prevent the leakage of the liquid, it is necessary to lock the nozzle head appropriately, and it is not possible to endure the complexity.

Further, in the known construction, the male screw at the lower end of the nozzle head is screwed into the female screw at the upper end of the cylinder (see, for example, Japanese Utility Model Publication No. 03-009813), and the engaging projection at the lower end of the nozzle head is formed. The nozzle head is locked in the push-in position by engaging with the corresponding engaging projections on the upper end of the cylinder (see, for example, Japanese Utility Model Publication No. 60-028521).

In such a structure, the nozzle head cannot be locked unless a relative rotational movement is applied between the nozzle head and the cylinder. Further, since the male screw, the engaging projection, etc. of the lower end portion of the nozzle head are exposed, the aesthetic appearance of the dispenser is impaired.

The relative rotational movement between the nozzle head and the cylinder requires fixing the nozzle head and rotating the cylinder, or fixing the cylinder and rotating the piston head. Therefore, it is difficult to automatically incorporate the nozzle head into the cylinder, which is an obstacle to automatic assembly of the dispenser.

According to the present invention, when the nozzle head is forgotten to be locked, the push type dispenser which can prevent the liquid in the container from leaking even if the nozzle head is tilted or tilted together with the container.
The purpose is to provide.

Another object of the present invention is to provide a primary valve for a push type dispenser which can prevent the liquid in the container from leaking out even if the push type dispenser is tilted or tilted when the nozzle head is forgotten to be locked. There is.

Another object of the present invention is to provide a push type dispenser which can incorporate a nozzle head into a cylinder without any relative movement.

[0018]

In order to achieve this object, in the present invention, the primary valve is not made of a steel ball, but is provided with a valve body and a flare body integrally, and is made of plastic and elastic. Is molded to have. When locking the nozzle head, the valve body of the primary valve is forcibly pressed against the valve seat, and the flare body extends outward of the valve body to generate elasticity, and the end thereof has its own elasticity. And are pressed against the wall surface of the valve seat.

Further, according to the present invention, the piston is elastically screwed to the cylinder to assemble the piston head into the cylinder, and the male screw is formed at the lower end of the piston. When the nozzle head is pushed in so as to be locked, a female thread to which the male thread of the piston is screwed is formed in the cylinder, and a slit is provided in the cylinder below the female thread to give elasticity to the female thread. ing.

[0020]

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

As shown in FIG. 1, a push type dispenser 10 according to the present invention comprises a cylinder 12 defining a pressure chamber 11 therein, a piston 14 slidably provided in the cylinder, and a piston. A nozzle head (also referred to as a push button) 16 fixed to the upper end of, for example, a beak shape, and the cylinder, piston, and nozzle head are all injection-molded from plastic. Both the piston 14 and the nozzle head 16 are hollow, and the hollow portions 15 and 17 are liquid outflow passages.

The cylinder 12 is an upper half portion with openings at the upper and lower ends.
18 and a lower half portion 20 having an upper end that fits in the upper half portion, and is molded separately. A flange 21 is formed on the upper end of the cylinder upper half portion 18, and an annular stopper 22 is formed on the inner wall of the cylinder 12 below the flange.

A return spring, for example, a compression spring 26, is built in the cylinder 12 and integrally pushes the piston 14 and the nozzle head 16 outward.

The dispenser 10 is a cylinder flange.
While holding 21 between the mouth 30 of the container 29 and the bottle cap 31, the bottle cap is detachably attached to the container mouth.

As described above, generally, the male screw of the bottle cap 31 is screwed onto the external thread of the container opening 30, and the dispenser 10 is attached to the opening of the container. , Push type dispenser that fits or welds the cylinder 12 to the container opening regardless of the bottle cap
The 10 may be fixed to the container 29.

With the outflow of liquid from the container, the container
In order to prevent the inside of 29 from becoming negative pressure, a negative pressure prevention hole (ventilation hole) 32 penetrates the flange 21 and the upper half of the cylinder.
Two pieces are provided on the side wall of 18, for example, 180 ° apart from each other.

The piston 14 is integrally provided with a skirt-shaped seal piece 34 slidably contacting the inner wall of the cylinder upper half portion 18, and this seal piece serves as a spring seat above the return spring 26. Has become. When the seal piece 34 comes into contact with the stopper 22 of the cylinder from below, the initial position (outward position) of the piston 14, that is, the nozzle head 16 is limited. The seal piece 34 is located at the initial position of the nozzle head 16 and below the negative pressure prevention hole 32 of the cylinder.

As can be seen from FIGS. 2 and 3 in addition to FIG. 1, a seal ring 23 is formed on the lower surface of the stopper 22 of the cylinder, and another seal ring 24 is formed in the radius of the negative pressure prevention hole 32. It is formed on the upper surface of the flange 21 inward in the direction. Here, the seal ring 23 is on the upper surface of the seal piece 34 of the piston,
The seal rings 24 are formed so as to be pressed against the lower surface of the bottle cap 31, respectively.

Further, the seal ring 25 is provided with a negative pressure preventing hole 32.
It is formed on the upper surface of the flange 21 of the cylinder radially outward of and is pressed against the inner surface of the bottle cap 31. Also,
The seal ring 27 is pressed against the mouth 30 of the container,
It is formed on the lower surface of the flange 21.

In this embodiment, the negative pressure prevention hole 32 penetrates the flange 21 and is formed in the side wall of the cylinder 12. Therefore, the pin Pv for forming the negative pressure prevention hole is extended from the flange direction in the axial direction of the cylinder, not in the direction intersecting the axial line of the cylinder 22 (see FIGS. 4A and 4B). Note that FIG. 4B is an enlarged view of the portion B in FIG. 4A.

Therefore, as shown in FIG. 4 (A), the mold of the cylinder can be composed of a pair of dies D1 and D2 which are slid in the axial direction of the cylinder, and the number of dies is smaller than that of the known structure. Reduced from 4 to 2. Also, in the known configuration,
While the mold is slid in two directions, that is, the axial direction of the cylinder and the direction intersecting the axial line, in this configuration, the mold only needs to be slid in one direction.

Therefore, the mold design can be freely performed without structural restrictions, and the mold can be structurally simplified. Then, the molding cycle of the cylinder 12 is shortened, high productivity can be secured, and the cylinder 12, that is, the dispenser
10 can be mass-produced at low cost.

Nozzle head 16 is not pushed in, piston
If 14 stays in its initial position, the piston is the return spring.
It is pressed against the seal ring 23 on the lower surface of the stopper by the biasing force of 26. Further, since the bottle cap 31 is screwed to the container 29 with the flange 21 sandwiched between the bottle cap 31 and the container mouth portion 30, the seal rings 24 and 25 that sandwich the negative pressure prevention hole 32 are not attached to the bottle cap 31.
It is pressed against the inner surface of 31.

The liquid in the container tries to leak through the negative pressure prevention hole 32. However, as mentioned above, the seal rings 23, 24
Is pressed to ensure liquid tightness, so that the seal rings 23 and 24 hinder the flow inward in the radial direction through the negative pressure prevention hole 32. Further, since the seal ring 25 ensures liquid tightness, the flow outward in the radial direction is prevented by the seal ring 25.
Hindered by.

As described above, by providing the seal rings 23, 24, 25, the leakage of the liquid through the negative pressure prevention hole 32 can be sufficiently prevented. Here, since the seal rings 23, 24, 25 extend in the axial direction of the cylinder 12, there is no problem in molding, and complication of the mold for cylinder molding is avoided,
It does not reduce productivity.

Instead of the seal rings 24, 25, an O-ring or the like may be arranged between the flange 21 and the bottle cap 31. However, in the structure in which the seal rings 24 and 25 are formed on the flange 21 as shown in the drawing, the liquid leakage can be easily prevented with a simple structure that does not cause a problem in molding without causing an increase in the number of parts. At least two seal rings 24 and 25 with the negative pressure prevention hole 32 in between are sufficient.

In the known construction, the packing (gasket) is sandwiched between the mouth and the flange of the container to ensure liquid tightness.

On the other hand, in the structure of the embodiment, since the seal ring 27 on the lower surface of the flange is pressed against the mouth 30 of the container to ensure liquid tightness, the liquid in the container is It does not leak through the bottle cap 31. for that reason,
Since it is not necessary to arrange the packing between the mouth portion 30 and the flange 21 of the container, the number of parts can be reduced. Since this seal ring 27 also extends in the axial direction of the cylinder 12, the die of the cylinder is not complicated.

In the embodiment, the seal rings 23, 24, 25, 27 are formed in a substantially triangular cross section. However, the seal ring need only have a shape that ensures liquid tightness, and is not limited to the substantially triangular cross section shown in the figure.

An annular projection 35 is formed on the outer wall of the piston 14 and is provided at a position where it slides on the stopper 22 of the cylinder when the nozzle head 16 is pushed in to lock the nozzle head together with the piston 14 ( (See FIG. 5). And the protrusion 35 of the piston is the stopper of the cylinder.
Nozzle head by sliding contact with 22 to ensure liquid tightness
Liquid leakage is prevented when 16 is locked.

In the embodiment, the annular groove 22a is formed on the upper surface of the stopper 22 to give elasticity to the stopper. Under the elasticity of the groove 22a, the projection 35 is
It adheres to 22 and the leakage of liquid is surely prevented. The groove 22a is sufficient as long as it produces elasticity, and the shape, arrangement, etc. are not limited to those shown in the figure.

As shown in FIG. 6, the stopper 122 is hung from the lower surface of the bottle cap 31, and the lower end of the stopper is seated.
The ring 23 may be formed. Also in this configuration, it is possible to reliably prevent the liquid from leaking through the negative pressure prevention hole 32. Further, the seal ring 24 on the upper surface of the flange is unnecessary. Since the stopper 122 hangs from the lower surface of the bottle cap 31, it becomes relatively long and the stopper
The resilience to adhere to 122 is also obtained in this configuration.

A male screw 36 is formed on the lower end of the piston 14, and a valve retainer 38 extends downward from the lower end of the piston. Further, a plurality of holes 39, for example, four holes 39 are formed at the lower end of the piston around the valve retainer 38, so that the pressure chamber-
11, communicating with the piston outflow passage 15.

The lower cylinder half portion 20 is formed so that it can be mounted inside the upper cylinder half portion 18 with a gap left between them. As can be seen from FIG. 1, an annular fitting projection 40 is formed from the center of the lower cylinder half portion 20. It is formed on the outer wall of the lower half of the cylinder extending to the lower end. In the embodiment, four fitting protrusions 40 are formed at substantially equal intervals, but the number, arrangement, etc. are not limited to those shown in the figure.

The cylinder 12 is assembled by fitting the fitting protrusion 40 to the inner wall of the cylinder upper half 18 and bringing the flange 42 into contact with the lower end of the cylinder upper half 18.

The upper end of the lower cylinder half portion 20 is open, and the lower cylinder half portion has a stepped shape with the lower end having a small diameter, and the suction tube 44 is fitted into the lower cylinder half portion from below. The inside of the lower half portion 20 of the cylinder also has a stepped hole shape, and in the embodiment, it is formed into a stepped hole shape of three steps that decreases from top to bottom. The female thread 45 to be attached is
Is formed in the hole in the middle part of.

A valve seat 47 for the primary valve 46 is provided in the hole in the lower cylinder half 20 below the internal thread 45. As can be seen from FIGS. 7 and 8 in addition to FIG. 1, the primary valve 46
Is integrally formed with a tubular valve body 48 and a flare body 50 that extends outwardly of the valve body to generate elasticity and is molded from a plastic such as polypropylene or polyethylene.

The flare body 50 has a flange 50a at the end,
The flange is pressed against the wall surface 47a of the valve seat under its own elasticity to ensure liquid tightness, and the pressure chamber-11 of the cylinder 12 is
The communication inside the container is blocked. It is also possible to directly press the end of the flare body 50 against the wall surface 47a of the valve seat without providing the flange 50a.

The valve body 46 has a hollow shape in order to keep the wall thickness constant, and an inflating portion 52 for preventing the valve body from falling out is formed at the tip (lower end) thereof. The valve seat 47 has a taper surface downward from the base and has a well-known shape with an insertion hole 47b formed at the tip,
The inflatable part 52 can be inserted by expanding its insertion hole 47b.
The diameter is larger than that of the insertion hole 47b, for example, it is formed in a partially spherical shape. Then, four vertical groove-shaped channels 52a are formed on the surface of the expanded portion 52, for example.

In the primary valve 46 having the above structure, the bulging portion 52 of the valve body is pushed into the insertion hole 47b of the valve seat to be inserted. Then, since the expansion part 52 is larger than the insertion hole 47b of the valve seat, the flange 50a is pressed against the valve seat wall surface 47a by the elasticity of the flare body 50, and the upper surface of the expansion part 52 is pressed against the valve seat 47. It is elastically attached to the valve seat without coming off.

In this way, the primary valve 46 is easily attached by pushing the bulging portion 52 into the insertion hole 47b of the valve seat, and there is no risk of falling off. And the primary valve 46
Presses the flange 50a of the flare body against the wall surface 47a of the valve seat by the elasticity of the flare body 50, and always interrupts the communication between the cylinder 12 and the inside of the container. Therefore, even if the dispenser 10 is tilted, there is no risk of the primary valve 46 opening, and the packing posture during transportation can be freely set.

Even when the dispenser 10 is inadvertently tilted or tilted during use, the primary valve 46 does not open and the liquid in the container does not leak out. Therefore, the dispenser 10 can be easily used without locking the nozzle head 16 to prevent liquid leakage.

When the cylinder 12 is made to have a negative pressure by the reciprocating motion of the piston 14 which is interlocked with the pushing of the nozzle head 16, the liquid in the container rises in the suction tube 44 and flows in the bulging portion of the valve body. The flare body 50 acts from the passage 52a through the valve seat insertion hole 47b (see FIG. 9). Then, the liquid pushes and spreads the flare body against the elasticity of the flare body 50, separates the flange 50a from the wall surface 47a of the valve body, opens the primary valve 46, and flows into the pressurizing chamber-11 of the cylinder. .

The flow path 52a is sufficient if the liquid that has risen in the suction tube is guided to the flare body 50. For example, a vertical groove provided at the periphery of the insertion hole 47b of the valve seat or a penetrating hole provided in the valve seat 47. The holes may be used as the flow path. Further, the shape that prevents the primary valve 46 from falling off is not limited to the shape having the inflating portion 52 shown in the drawing.

When the nozzle head 12 is pushed in and locked, the valve retainer 38 at the lower end of the piston causes the flare body 50 to bend and the taper surface of the valve body 48 of the primary valve to move as shown in FIG. Force the seat 47 to press. Therefore, the primary valve 46
Is locked, and leakage of liquid through the primary valve is sufficiently prevented.

As described above, in the embodiment, the flange 50a of the flare body is elastically pressed against the wall surface 47a of the valve seat, and the taper surface of the valve body is forcibly pressed against the valve seat 47. And it's locked. That is, a portion that is opened under hydraulic pressure (flange 50a, wall surface 47a of valve seat) and a portion that is locked and does not open (taper surface of valve body 48, valve seat 47) are separately provided. .

With this structure, the flare body 50 functioning as a valve spring can be formed with a large amount of deflection, and the thickness and length of the flare body 50 can be changed to obtain the optimum elasticity corresponding to the type of liquid. The primary valve 46 can be easily designed.

Since the primary valve 46 is easily molded into a shape that does not slip off from the valve seat 47, it is not necessary to provide a drop-out preventing projection on the inner surface of the lower cylinder half 20, and the lower cylinder half is structurally simplified. To be done.

Since the primary valve 46 is molded from plastic, the primary valve 46 is not corroded by the liquid. The primary valve 46 is made of elastomer instead of plastic.
It may be molded from (rubber). However, if the primary valve 46 is made of plastic, great elasticity can be obtained and the molding can be performed at low cost.

As shown in FIG. 11 (A), if the flange 50a is provided with an annular projection 54 having a substantially triangular cross section and is in line contact with the wall surface 47a of the valve seat, the space between the primary valve 46 and the valve seat 47 is reduced. Liquid tightness is surely obtained. The configuration of line contact is not limited to the illustrated shape. For example, as shown in FIG. 11 (B), flare body 50
If the end of is bent outward and molded, line contact is secured despite the simple structure.

As can be seen from FIG. 1, a return spring 26 is arranged above the female screw 45 and between the hole in the lower cylinder half 20 and the seal piece 34 of the piston. Also, the annular groove 56
Are formed at the lower end of the lower cylinder half 20 to ensure uniform cooling of the plastic lower cylinder half 20.

In order to generate elasticity in the female thread 45 in the lower half of the cylinder, a slit 56 is formed in the lower cylinder half 20 from the upper end to the female thread (see FIG. 12). Therefore, when the piston 14 is pushed into the cylinder 12, the external thread 36 at the lower end of the piston pushes the upper end of the lower cylinder half 20 and fits into the internal thread 45 of the lower cylinder half.

In this way, the slit 56 is provided and the female screw 45
Cylinder 12, piston 14
The male thread 36 of the piston can be fitted and screwed into the female thread 45 of the cylinder without applying a relative rotational movement therebetween, and the piston 14 can be easily and automatically incorporated into the cylinder 12. Further, not only the internal thread 45 of the lower half of the cylinder but also the external thread 36 of the lower end of the piston is hidden in the cylinder, so that the appearance of the dispenser 10 is not spoiled.

The upper half of the cylinder 18 and the lower half of the cylinder
It goes without saying that the gap of 20 is of a size that does not impair the elasticity of the lower cylinder half 20 near the female screw 45. In the embodiment, the number of slits 56 is one, but 2
More than one slit may be provided.

As shown in FIG. 1, a valve seat 62 is provided in the piston outflow passage 15, and a secondary valve 64 is built in the piston 14. The secondary valve 64 has a rod-like shape, and the pressing rod 65 extends from the upper edge of the nozzle head 16 into the outflow passage 15 of the piston to prevent the secondary valve 64 from escaping. The tip of the outflow passage 17 of the nozzle head is an outlet 66.

Push type dispenser having the above structure
The 10 is assembled in several steps as follows.

(1) First, the inner element built in the cylinder 12, that is, the secondary valve 64, the piston 14, and the retarder.
The spring 26 and the primary valve 46 are incorporated into the lower half portion 20 of the cylinder and integrated in advance. For integration, as shown in FIG.
The secondary valve 64, the piston 14, the return spring 26, the primary valve 46, and the lower cylinder half 20 are arranged in series in this order.

Then, a pushing force is applied so that the secondary valve 64 is housed in the piston 14, the return spring 26 and the primary valve 46 are housed in the cylinder lower half 20, respectively. Push it into 20. Then, due to the existence of the slit 56, the male screw 36 at the lower end of the piston is
While expanding the upper end of 20, push the female screw 45 on the lower half of the cylinder.
And is screwed on without rotational movement.

When the male screw 36 and the female screw 45 are screwed together, the upper end of the lower half portion 20 of the cylinder returns to its original shape to firmly grip the piston 14, and the secondary valve 64, the piston 14, and the return spring 26 The primary valve 46 and the lower cylinder half 20 are integrated.

For convenience of explanation, the inner element (the secondary valve 64, the piston 14, the return spring 26, the primary valve 46) is assembled into the lower half portion 20 of the cylinder and integrated into an inner assembly 68. I will call it.

(2) Then, as shown in FIG. 14, the nozzle head 16, the bottle cap 31, the cylinder upper half portion 18, the inner assembly 68, and the suction tube 44 are arranged in series.

Then, the nozzle head 16 is pushed in from above with the bottle cap 31 and the cylinder upper half 18 interposed, and the inner assembly is pushed in from below while inserting the suction tube 44 into the inner assembly 68.

Then, the cylinder upper half portion 18 is incorporated into the cylinder lower half portion 20 of the inner assembly from above, and the cylinder upper half portion and the cylinder lower half portion are integrated, and the nozzle head 16 is connected to the bottle. It is fitted and fixed to the upper end of the piston 14 of the inner assembly via the cap 31. At the same time, the suction tube 44 is fitted and fixed to the lower end of the cylinder lower half portion 20 of the inner assembly. Then, as shown in FIG. 15, the push type dispenser 10 is assembled.

In this way, the piston 14 and the lower half of the cylinder
Just by applying pushing force between 20
Is screwed onto the female screw 46 in the lower half of the cylinder, and the rotational movement of the piston and nozzle head 16, which is an obstacle to the automatic assembly of the push type dispenser 10, becomes unnecessary. Therefore, the push-type dispenser 10 can be easily assembled automatically and the productivity is improved.

The above-described assembly of the dispenser 10 is an example, and the dispenser 10 may be assembled in an order other than the above. For example, the piston 14 with the secondary valve 64 pre-stored
May be arranged on the lower half 20 of the cylinder in which the return spring 26 and the primary valve 46 are housed in advance, and the lower half of the cylinder may be pushed upward to form the inner assembly 68. In any case, in the structure of the embodiment, the push type dispenser 10 can be assembled in a few steps without rotating motion, and the assembling can be easily automated.

The bottle cap 31 is screwed onto the mouth 30 of the container 29 filled with the liquid, and the dispenser 10 is mounted on the container, packed, transported, and displayed. Where the container mouth
Screwing the bottle cap 31 onto the 30 requires a rotary movement. However, since a large number of dedicated machines have been developed and provided for screwing the bottle cap 31 to the container opening 30, screwing of the bottle cap can be performed without any trouble.

The dispenser 10 is assembled by locking the piston 14 and the nozzle head 16 in the pushed-in position, and the container 29
Is attached to. Therefore, unexpected pushing of the nozzle head 16 due to carelessness, falling, or the like during transportation or display is prevented, and liquid leakage is prevented. Further, since the nozzle head 16 is pushed in, the push type dispenser 10 can be miniaturized, can be packaged in a small size, and the display space can be reduced, so that the push type dispenser 10 can be efficiently transported and displayed.

As described above, when the nozzle head 16 is locked, the valve retainer 38 of the piston simultaneously locks the primary valve 46 and double locks it, so that leakage of the liquid is reliably prevented. Even if the nozzle head 16 is unlocked and the primary valve 46 is unlocked, the primary valve 46
Is closed between the end of the flare body 50 and the valve seat wall surface 47a, the liquid does not leak even when the dispenser 10 is tilted or tilted.

In the known configuration, the flange, the negative pressure prevention hole,
Since the valve seat of the primary valve and the projection for preventing the escape of the primary valve are formed in the cylinder of an integral body, the cylinder has a stepped shape of 3 to 4 steps, and the structural complexity of the cylinder cannot be avoided.

On the other hand, in the embodiment, the cylinder 12 is divided into the upper half portion 18 and the lower half portion 20, and the lower half portion is fitted into the upper half portion to assemble the cylinder. In this configuration, the flange
21, the negative pressure prevention hole 32 is located in the upper half 18 of the cylinder, and the valve seat of the primary valve
47 is provided on the lower half portion 20 of the cylinder, and flanges and the like are distributed and arranged on the upper half portion and the lower half portion of the cylinder.

Therefore, the upper half portion 18 of the cylinder can be formed in a simple structure having no step portion, and the die can be structurally simplified.
Further, the lower cylinder half portion 20 is structurally simplified as compared with the case where a single-piece cylinder is molded from one mold. Therefore, with two molds, the upper half 18 and the lower half of the cylinder
Considering the disadvantages of individually molding and assembling the 20 pieces, the die cost can be reduced and the cylinders 12 can be mass-produced at low cost.

When the piston 14 and the lower half portion 20 of the cylinder are unscrewed to unlock the piston 14 and the nozzle head 16, the biasing force of the return spring (compression spring) 26 causes the nozzle head 16 to move to the piston. Pushed outward with 14. Then, the nozzle head 16 moves to the initial position (protruding position) where the skirt-shaped seal piece 34 of the piston contacts the stopper 24 of the cylinder (see FIG. 1).

The nozzle head 16 is pushed in between the pushing position where the male screw 36 at the lower end of the piston does not fit into the female screw 45 in the lower half of the cylinder and the initial position (protruding position), and the piston 14 is moved inside the cylinder 12. When the container is reciprocated, the liquid in the container flows into the pressurizing chamber-11 of the cylinder through the suction tube 44 and the primary valve 46 and is pressurized. Then, the pressurized liquid flows out of the outflow port 66 through the hole 39 at the lower end of the piston, the secondary valve 64, and the outflow passages 15 and 17.

The nozzle head 16 is formed in a beak shape, but nozzle heads of various other shapes can be adopted. In addition, a spinner (swirlization member) is provided in the outflow passage 17 of the nozzle head.
May be provided, and the spray flow vortexed by the spinner may be discharged.

The above-mentioned embodiments are intended to explain the present invention, and do not limit the present invention at all, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. It goes without saying that it will be done. For example, although the nozzle head 16 is pushed vertically, it may be pushed in an inclined direction instead of vertically.

[0086]

As described above, in the present invention, in the primary valve, the elasticity of the flare body presses the end of the flare body against the wall surface of the valve seat to always shut off the communication between the container and the cylinder. Therefore, even if the dispenser is tilted, there is no risk of opening the primary valve, and the packing posture during transportation can be freely set.

During use of the dispenser, the dispenser
The primary valve will not open and the liquid in the container will not leak out even if you inadvertently tilt or tilt it. Therefore, the liquid can be prevented from leaking out without locking the nozzle head, and the dispenser can be easily used.

The primary valve can be molded into a shape that does not fall out,
It can be easily attached to the valve seat without falling off.

If the flare body is provided with a flange having an annular projection that makes line contact with the valve body, liquid tightness between the flare body and the valve seat wall surface can be reliably obtained.

If the ends of the flare are folded back outward, the flare body comes into line contact with the wall surface of the valve seat despite the simple structure.

Further, in the present invention, if the cylinder and the piston are arranged in series and pushed in, the male thread at the lower end of the piston is pushed into the cylinder while expanding the cylinder, and is fitted and screwed into the female thread of the cylinder. To be done. Therefore, the piston and nozzle head are locked only by pushing the piston into the cylinder. Therefore, the rotational movements of the piston and the nozzle head, which are obstacles to the automatic assembly of the push type dispenser, are unnecessary in the present invention, and the automatic assembly of the push type dispenser can be easily performed and the productivity is improved.

Since the cylinder is divided into the upper half part and the lower half part for molding, the upper half part of the cylinder can be molded into a simple structure without steps and the mold can be structurally simplified. Also, the lower half of the cylinder is structurally simplified. Therefore, even considering the disadvantage of individually molding and assembling the upper half part and the lower half part of the cylinder with the two molds, the mold cost can be reduced overall, and the cylinder can be manufactured at low cost.

Since the upper half part and the lower half part of the cylinder are also divided, the slit and the female screw can be formed in the lower half part of the cylinder without difficulty in molding.

A male screw for locking the nozzle head and the piston at the pushing position is provided at the lower end of the piston and hidden inside the cylinder, so that an aesthetic appearance is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a push type dispenser according to an embodiment of the present invention at an initial position of a nozzle head.

FIG. 2 is an enlarged vertical cross-sectional view of the dispenser partially broken near the bottle cap.

FIG. 3 is an enlarged plan view of a flange of a cylinder.

FIG. 4 is a schematic vertical cross-sectional view of a cylinder molding die.

FIG. 5 is a vertical cross-sectional view of a push type dispenser with a nozzle head and a piston locked.

FIG. 6 is a vertical sectional view of a push type dispenser according to another embodiment similar to FIG.

FIG. 7 is an enlarged vertical cross-sectional view of the dispenser near the primary valve, partially broken.

FIG. 8 is a schematic perspective view of a primary valve.

FIG. 9 is an enlarged vertical cross-sectional view of the dispenser with the primary valve opened, partially broken away.

FIG. 10 is a partial vertical cross-sectional view of a push type dispenser with a locked primary valve.

FIG. 11 is a side view of a partially broken primary valve according to another embodiment.

FIG. 12 is a perspective view of a lower half of a piston and a cylinder.

FIG. 13 is a front view of the inner element before the inner assembly is assembled.

FIG. 14 is a front view of a nozzle head, an inner assembly and the like before the push type dispenser is assembled.

FIG. 15 is a front view of the assembled push-type dispenser.

[Explanation of symbols]

10 Push type dispenser 12 cylinders 14 piston 16 nozzle head 18 Upper half of cylinder (upper half of cylinder) Lower half of cylinder 20 (lower half of cylinder) 21 flange 23-25 seal ring 26 Return spring (compression spring) 29 containers 30 container mouth 31 bottle cap 32 Negative pressure prevention hole (ventilation hole) 34 skirt-shaped seal pieces 36 Male thread at the bottom of the piston 38 Valve retainer 44 Suction tube 45 Cylinder male thread 46 Primary valve 47 Primary valve seat 47a Wall of valve seat 47b Valve seat insertion hole 48 Primary valve disc 50 Flare body of primary valve 50a Flare body flange 52 Bump of valve body 52a Flow path on bulged surface 54 Flange annular projection 56 slits 62 Secondary valve seat 64 Secondary valve 66 Outlet 68 Inner assembly

Claims (8)

[Claims] 1. A cylinder having a suction tube attached to its lower end is attached to the mouth of a container, and a piston provided at the lower end of the nozzle head pushes the nozzle head against the biasing force of the return spring. By sliding in the cylinder, the liquid in the container is sucked up and pressurized by the cylinder through the suction tube and the primary valve.
It flows out through the outflow passage of the piston and nozzle head,
Push-type dispenser that is transported and displayed with the nozzle head locked in the push-in position with the piston
When the primary valve locks the nozzle head together with the piston, the main body is pushed by the piston and forcedly pressed against the valve seat, and elastically extends outward of the valve body, and its end is elastic. A push-type dispenser characterized by having a flare body that presses against the wall surface of the valve seat under the condition of being molded from plastic. 2. The push-type dispenser according to claim 1, wherein the valve body of the primary valve is formed with an inflating portion that pushes the hole of the primary valve from above and inserts it into the valve body to prevent it from slipping out upward. -. 3. An annular projection capable of making line contact with the wall surface of the valve seat,
The push-type dispenser according to claim 1 or 2, wherein the push-type dispenser is formed on the end surface of the flare body. 4. The push-type dispenser according to claim 1, wherein an end of the flare body is formed by being folded back outward so as to be in line contact with the wall surface of the valve seat. 5. When locking the nozzle head together with the piston, a main body which is pushed by the piston and is forcibly pressed against the valve seat; A primary valve for a push type dispenser which is originally made of plastic and has a flare body that presses against the wall surface of the valve seat. 6. A cylinder to which a suction tube is attached at the lower end is attached to the mouth of the container, and a piston provided at the lower end of the nozzle head pushes the nozzle head against the biasing force of the return spring. By sliding in the cylinder, the liquid in the container is sucked up and pressurized by the cylinder through the suction tube and the primary valve.
It flows out through the outflow passage of the piston and nozzle head,
Push-type dispenser that is transported and displayed with the nozzle head locked in the push-in position with the piston
In the cylinder, the cylinder has a flange to be held between the container mouth and the bottle cap, and opens up and down to extend the upper half of the piston through the upper end opening; and the open upper end and suction that can be fitted into the upper half. The tube is divided into a lower half to which the tube is attached and a lower half to form a male thread, and a male thread is formed on the lower end of the piston. At least one slit that is formed in the half part and extends the valve retainer from the lower end of the piston and causes elasticity to the female screw is formed from the upper end of the lower half part of the cylinder to the female screw, and the primary valve pushes the nozzle head and pushes the piston head. When the male thread is screwed onto the female thread of the cylinder, the body is forcibly pressed to the valve seat by the valve retainer at the lower end of the piston; Their flare presses the wall surface of the under valve seat of the elastic - push type dispenser, characterized in that and a body is molded from plastic -. 7. The push-type dispenser according to claim 6, wherein a negative pressure prevention hole for preventing negative pressure in the container is formed in a side wall of the cylinder by penetrating the flange of the cylinder. 8. At least two radially separated from each other
8. The push type dispenser according to claim 7, wherein the three seal rings are formed on the upper surface of the flange so as to sandwich the negative pressure preventing hole so as to be pressed against the inner surface of the bottle cap.