JPH07144159A - Push type dispenser - Google Patents

Abstract

PURPOSE:To design and produce a push type dispenser by considering a future waste disposition. CONSTITUTION:A return spring 20 which can be substituted for a coil spring is constituted by continuously molding many elastic pieces 47 from plastic. A valve retainer 56 which forcibly presses a primary valve 48 to a valve seat 54 when a nozzle head 16 and a piston 14 are locked in a push-in position is formed integrally with these elastic pieces 47. The primary valve 48 is also simultaneously locked by this valve retainer 56.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sucks and pressurizes the liquid in a container into a cylinder by sliding a piston which is attached to the mouth of a container containing a liquid and which is interlocked with pushing of a nozzle head. The present invention relates to a push-type dispenser that causes it to flow out.

[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 sucked up into the cylinder, pressurized and discharged.

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 outflow port provided in the nozzle head to the cylinder is formed from the piston to the nozzle head.

A primary valve for controlling 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 for controlling the flow of pressurized liquid from the cylinder to the outlet is the piston or nozzle head. It is provided in each of the outflow channels.

A return spring such as a compression coil spring is disposed in the cylinder to bias the nozzle head outward together with the piston, and the nozzle head is projected to its outer position (initial 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 initial position and the pushed position of the nozzle head becomes the stroke of the piston.

[0006] Generally, this push type 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. A steel ball is usually used as the primary valve, and the primary valve (steel ball) is forcibly pressed against the valve seat by its own weight to be 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 constructed so as to lock the nozzle head in the pushed-in position together with the piston, and indirectly prevents the piston from sliding and prevents the liquid from leaking.

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]

As described above, in the known push type dispenser, the steel ball is widely used as the primary valve and the compression coil spring is widely used as the return spring. However, since the steel ball and the compression coil spring are both made of metal, there is a risk of corroding the steel ball and the compression coil spring depending on the type of liquid that should flow out, and the type of liquid that should flow out is limited.

If the primary valve and the return spring are molded from plastic, there is no risk of corrosion. It is not difficult to make the primary valve plastic, and a plastic primary valve is used. However, it is difficult to mold a return spring having a biasing force equivalent to that of a compression coil spring from plastic, and a metal compression coil spring is widely used as the return spring.

Recently, environmental destruction due to industrial waste has become a serious problem, and it is required to design and manufacture in consideration of future disposal. Here, since the cylinder, piston, nozzle head, bottle cap, etc. are conventionally formed of plastic, if the primary valve is made of plastic, all components other than the return spring consisting of the compression coil spring will be made of plastic. Become.

For example, if all the components are molded from a thermoplastic such as polypropylene, when the dispenser is discarded, if the dispenser is heated and melted, the melted plastic can be reused, which causes environmental damage. It can be prevented.

However, as described above, in the known push type dispenser, the compression coil spring (made of metal) is adopted as the return spring, and therefore, when the dispenser is discarded, the dispenser is heated, Prior to melting, the compression coil spring must be removed in advance, which is not easy to dispose of.

Further, the nozzle head and the piston are separately molded without being integrated even though they are integrally pushed. This is because the nozzle head usually has a substantially beak shape with a horizontally extending beak and the head of the nozzle head has a larger diameter than the piston extending downward, which makes it difficult to perform integral molding in terms of processing. .

Further, the secondary valve is arranged in the outflow passage of the piston, but the secondary valve is inserted into the piston from above. When the nozzle head and the piston are integrated, the secondary valve to the piston is Insertion and placement becomes difficult.

An object of the present invention is to provide a push type dispenser in consideration of future disposal.

Another object of the present invention is to provide a push type dispenser in which the nozzle head and the piston are integrated without complicating the insertion and arrangement of the secondary valve.

[0020]

In order to achieve this object, according to the present invention, a return spring which can replace a compression coil spring is constructed by continuously molding a large number of elastic pieces from plastic. There is. And, when the nozzle head and the piston are locked at the pushing position, the valve retainer for forcibly pressing the primary valve against the valve seat is integrally formed with the elastic piece.

By forming an opening in the ceiling wall of the nozzle head above the piston, the nozzle head,
It is possible to integrate the piston. Then, the opening of the nozzle head is closed with a lid, and the lid of the nozzle head is molded of plastic integrally with the secondary valve, with a secondary valve spring that can expand and contract in the axial direction of the piston interposed.

[0022]

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 includes a cylinder 12 defining a pressurizing chamber 11 therein, a piston 14 slidably provided in the cylinder, and a piston. A nozzle head (also called a push button) 16 having a substantially beak shape fixed to the upper end of the cylinder, the piston,
The nozzle heads are all injection molded from plastic.

Both the piston 14 and the nozzle head 16 are hollow, and the hollow portions 15 and 17 serve as liquid outflow passages. The return spring 20 is built into the cylinder 12 and the piston
14, the nozzle head 16 is integrally pushed outward.

The dispenser 10 is a flange of the cylinder.
While sandwiching 21 between the mouth portion 19 of the container 18 and the bottle cap 24, it is detachably attached to the container mouth portion using the bottle cap. A recess is provided on the back surface of the flange 21, and the packing 26 is fitted into the recess to integrate the cylinder and the packing.

Generally, the male screw of the bottle cap 24 is screwed onto the male thread of the container opening 19, and the dispenser 10 is attached to the container opening. However, other methods, such as the bottle cap, are used. The dispenser 10 may be attached to the container 18 by fitting or welding the cylinder 12 to the container opening.

The cylinder 12 has a suction tube at the lower end.
A stepped shape having 28 integrally, and a negative pressure prevention hole (ventilation hole) 30 extending in the axial direction is provided on the stepped portion of the cylinder, for example.
Two pieces are provided 180 ° apart from each other.

Normally, the negative pressure prevention hole is formed in the wall surface of the cylinder and extends in the direction orthogonal to the axis of the cylinder. However, in the embodiment, since the negative pressure prevention hole 30 in the axial direction is provided in the step portion of the cylinder 12, the injection mold of the cylinder 12 is structurally simplified, and the mold can be manufactured at low cost. , The cylinder molding cycle is shortened.

In the embodiment, the opening 32 is formed in the ceiling wall of the nozzle head 16 above the piston 14, and the opening is closed by the lid 34. By forming the opening 32 in the ceiling wall of the nozzle head 16, the piston 14 and the nozzle head 16 can be integrated, and the piston and the nozzle head are integrally molded from plastic.

A secondary valve 36 is provided in the outflow passage 15 of the piston. The lid 34 that closes the opening 32 of the nozzle head is formed of plastic integrally with the secondary valve with a secondary valve spring 38 interposed. The secondary valve spring 38 is configured to be expandable / contractible in the axial direction, and in the embodiment, it is composed of a series of substantially corrugated elastic pieces. However, the spring 38 need only expand and contract in the axial direction to generate a biasing force in the axial direction, and the spring may be formed of elastic pieces of other shapes such as a triangular corrugated shape and a hollow cylindrical shape.

Since the lid 34 is integrally formed with the secondary valve 36, an increase in the number of parts of the dispenser 10 is prevented in spite of the new construction of the lid, while the piston 14 and the nozzle head 16 are prevented.
The number of parts is reduced by the integration.

An annular chaplet 40 through which the piston 14 is inserted is fixed to the upper end of the cylinder 12. An internal thread 41 is formed on the inner surface of the chaplet 40, and the internal thread and the external thread 42 provided on the nozzle head 16 constitute a locking means for the dispenser 10. That is, when the nozzle head 16 is pushed in, the male screw 42 of the nozzle head is screwed into the female screw 41 of the chaplet, so that the nozzle head 16 and the piston 14 are locked in the pushing position (see FIG. 2).

A skirt-shaped seal 43, which slides on the outer surface of the piston 14, is provided on the inner surface of the chaplet 38, and the seal comes into contact with the step portion 44 on the outer surface of the piston 14 so that the piston 14 initial position, that is, nozzle head 16
Is defined (see FIG. 1). Piston 14
A skirt-shaped seal piece 46 that slides on the inner surface of the cylinder 12 is integrally provided at the lower end.

In this embodiment, the return spring 20 is made of plastic. That is, the return spring 26 is made of plastic by continuously molding a large number of elastic pieces 47 that can expand and contract in the axial direction. The elastic piece 47 is formed in a corrugated plate shape in the embodiment,
It suffices if it expands and contracts in the axial direction to generate a biasing force in the axial direction.
Retort from elastic pieces of other shapes such as triangular corrugations and hollow cylinders
The spring 26 may be molded.

The primary valve 48 has an inflow passage 49 at the lower end of the cylinder 12.
A valve retainer 52 disposed inside prevents the primary valve from escaping upward. The primary valve 48 has holes 50 at the top and bottom and is formed from a plastic in a vertically symmetrical shape. And the primary valve 48
A valve retainer 56 for forcibly pressing the valve seat 54 is integrally formed with the elastic piece 47 from plastic.

As shown in FIG. 1, for example, the valve retainer 56
Extends downward from the uppermost elastic piece 47, and when the nozzle head 16 and the piston 14 are pushed in, the lower end thereof is the primary valve.
A valve retainer is formed in a length and shape that can force 48 to be pressed against the valve seat 54. Hold the spring on the inner surface of the piston 14.
51 is formed to prevent the return spring 20 from sticking to the valve seat of the secondary valve. The molding position of the valve retainer 56 with respect to the elastic piece 47 is an example, and the valve retainer may be extended downward not from the uppermost elastic piece, but from another position, for example, the elastic piece at the center.

In the embodiment, a notch 57 is formed at the lower end of the valve retainer 56.
Is provided so that the lower end can be elastically deformed, and the hole 50 has a reverse taper shape. With this configuration, even if there is some molding error in the length of the valve retainer 56, the lower end of the valve retainer 52 can engage with the hole 50 of the primary valve, and the primary valve 48 is forcibly pressed against the valve seat 54. Yes (see Figure 2).

The smaller the number of parts, the cheaper the dispenser can be produced. However, if the assembly is complicated even if the number of parts is small, inexpensive production of the dispenser is hindered. Therefore, it has been conventionally desired to reduce the number of parts without complicating the assembly.

In this embodiment, as can be seen from FIG.
The dispenser 10 includes an integrated lid 34, secondary valve 36,
Integrated nozzle head 16, piston 14, chaplet 40, bottle cap 24, integrated elastic piece 4
7, return spring 20 consisting of valve retainer 56, primary valve 48,
Only the cylinder 12 is provided, and the dispenser can be constructed from a small number of parts of 7 members.

If the 7 members are arranged and arranged in the order shown in FIG. 3, the dispenser 10 can be assembled only by pressing from above and below.
It can be easily done by an automatic assembly machine. As described above, the dispenser 10 can be manufactured at low cost because it is composed of a small number of parts such as 7 members and can be easily assembled automatically. Since the primary valve 48 is formed vertically symmetrically, the primary valve can be incorporated in the cylinder 12 without considering the vertical direction of the primary valve.

Furthermore, since all the seven members are made of plastic, when the dispenser is discarded, it is not necessary to previously remove the metal components, and the disposal can be easily performed. In particular, if all seven members are molded from thermoplastics, the dispenser can be easily discarded by heating and melting after use, and the plastics after melting can be reused and environmental damage can be prevented.

As shown in FIG. 2, the nozzle head 16 is pushed in against the biasing force of the return spring 20, and the male screw 42 of the nozzle head is screwed into the female screw 41 of the chaplet, so that the nozzle head and the piston The dispenser 10 is assembled by locking 14 in the push-in position. Then, the dispenser 10 is attached to the mouth portion 19 of the container 18 filled with the liquid by the bottle cap 24.

Since the nozzle head 16 is locked, unexpected pushing of the nozzle head due to carelessness, overturning, etc. during transportation of the dispenser 10 and during display is prevented,
Liquid leakage is prevented. Further, since the nozzle head 16 is pushed in, the dispenser 10 can be downsized, can be packaged in a small size, and have a small exhibition space, so that it can be efficiently transported and displayed.

When the nozzle head 16 is locked, the valve holding rod 56 of the piston forcibly presses the primary valve 48 against the valve seat 54 and locks it at the same time, so that leakage of the liquid is reliably prevented.

Since the secondary valve 36 is pressed against the valve seat, even if the dispenser is inadvertently tilted or tilted during use of the dispenser 10, the secondary valve will not be opened and the liquid in the container will be discharged from the nozzle head. No leakage through 16 and piston 14. Therefore, even if the nozzle head 10 is not frequently locked during use, leakage of liquid can be prevented, and the dispenser-
Can be used easily.

Even if the liquid in the container flows out between the cylinder 12 and the piston 14 through the negative pressure prevention hole 30, it is blocked by the skirt-shaped seal piece 43 of the chaplet and 46 at the lower end of the piston. Do not leak.

The outflow of the liquid by the dispenser 10 is similar to that of the conventional dispenser.
When the male screw 42 of the nozzle head and the female screw 41 of the chaplet are unscrewed, the biasing force of the return spring 20 causes the nozzle head 16 and the piston 14 to move to the initial positions shown in FIG.

When the nozzle head 16 is repeatedly pushed in and the piston 14 is slid in the cylinder 12, the liquid in the container is passed through the suction tube 28 and the primary valve 48 and the pressure chamber 11 of the cylinder 12 is pushed. And is pressurized, and the pressurized liquid flows out from the outlet 58 of the nozzle head through the secondary valve 36 and the outlets 15 and 17.

In the embodiment, the nozzle head 16 is formed in a substantially beak shape, but nozzle heads of various other shapes can be adopted. Further, a spinner (vortexing member) may be provided in the outflow passage 17 of the nozzle head so that the spray flow vortexed by the spinner can flow out.

The above-mentioned embodiments are for explaining the present invention, and are not intended to limit the present invention at all, and the present invention includes all modifications and alterations within the technical scope of the present invention. It goes without saying that it will be done.

[0051]

As described above, according to the present invention, the return spring is made plastic by continuously molding a large number of elastic pieces which can expand and contract in the axial direction, and all the plastics of the constituent members of the dispenser. Since it is designed to be used, it can be easily disposed of. In particular, if all the constituent members are molded from a thermoplastic, the dispenser can be easily discarded by heating and melting after use, and the melted plastic can be reused to prevent environmental damage.

By forming an opening in the ceiling wall of the nozzle head above the piston, the nozzle head and the piston can be integrated. Since the opening of the nozzle head is closed by the lid and the lid of the nozzle head is integrally molded with the secondary valve, the increase in the number of parts is prevented despite the new construction of the lid, and the nozzle head and piston are integrated into one part. The points will decrease. Further, by integrating the lid and the secondary valve, the secondary valve can be inserted and arranged in the piston without any trouble.

A push type dispenser can be constructed from a small number of parts of 7 members, and it can be easily assembled by an automatic assembling machine and can be manufactured at low cost.

At the pushing position (lock position), the
Since the valve retainer of the spring spring forcibly presses and locks the primary valve against the valve seat, even if the push type dispenser falls, the liquid in the container does not leak through the cylinder.

Since the secondary valve is pressed against the valve seat, even if the dispenser is inadvertently tilted or tilted while the dispenser is in use, the secondary valve cannot be easily opened, and the liquid in the container may become a piston. It does not leak through the nozzle head. Therefore, even if the nozzle head is not locked frequently during use, the liquid can be prevented from leaking and the dispenser can be used easily.

If the cylinder has a stepped shape and the negative pressure prevention hole in the axial direction is formed in the stepped portion of the cylinder, the injection molding die of the cylinder is structurally simplified and the die can be manufactured at low cost. The cylinder molding cycle is shortened.

[Brief description of drawings]

FIG. 1 is a push-type dispenser according to an embodiment of the present invention in an initial position of a nozzle head and a piston.
FIG.

FIG. 2 is a vertical cross-sectional view of a push type dispenser at a pushing position of a nozzle head and a piston.

FIG. 3 is a front view of the push type dispenser before assembly.

[Explanation of symbols]

 10 Push type dispenser 12 Cylinder 14 Piston 16 Nozzle head 18 Container 19 Container mouth 20 Return spring 24 Bottle cap 28 Suction tube 30 Negative pressure prevention hole 32 Nozzle head opening 34 Lid 36 Secondary valve 38 Two Spring for secondary valve 40 Chaprit 47 Elastic piece of return spring 48 Primary valve 56 Valve retainer for return spring

Claims (7)

[Claims] 1. A piston slides in a cylinder in association with pushing of a nozzle head mounted on a container against a biasing force of a return spring, so that liquid in the container is a suction tube or a primary valve. After being sucked up and pressurized by the cylinder,
In a push type dispenser that flows out through a secondary valve and an outflow passage of a piston and a nozzle head, the nozzle head and the piston are integrally molded from plastic; the nozzle head has an opening in a ceiling wall above the piston; The opening of the head is closed by a lid; the lid of the nozzle head and the secondary valve are integrally molded from plastic with a secondary valve spring that is expandable and contractable in the axial direction of the piston interposed therebetween. Dispenser. 2. The piston is slid in the cylinder in association with the pushing of the nozzle head mounted on the container against the biasing force of the return spring, and the liquid in the container is a suction tube or a primary valve. After being sucked up and pressurized by the cylinder,
In a push-type dispenser that is discharged through a secondary valve and through the outflow passage of the piston and nozzle head, the nozzle head is locked together with the piston in the push-in position for conveyance, and the nozzle head and piston are integrally molded from plastic. The nozzle head has an opening in the ceiling wall above the piston; the opening of the nozzle head is closed by a lid; the lid of the nozzle head, the secondary valve is a secondary valve spring that can expand and contract in the axial direction of the piston. The return spring is integrally molded from plastic by interposing, and when the nozzle head and the piston are locked in the pushing position, the primary spring is forced to the valve seat by a large number of continuous elastic pieces that can expand and contract in the axial direction. Pusher that is integrally formed with a valve pressing rod that presses dynamically and is molded from plastic. Flop dispenser -. 3. A cylinder is integrally formed with a suction tube at its lower end and is molded from plastic; a chaplet through which the piston is inserted is fixed to the upper end of the cylinder, and the chaplet comes into contact with a step on the outer surface of the piston. 3. The push-type dispenser according to claim 1, wherein the push-type dispenser is integrally formed with a skate-shaped seal that limits the initial position of the piston and slides on the outer surface of the piston. 4. The push type dispenser according to claim 3, wherein the cylinder has a stepped shape, and a negative pressure prevention hole extending in the axial direction is formed in a stepped portion of the cylinder. 5. A piston slides in a cylinder in association with pushing of a nozzle head that is mounted on a container and resists the biasing force of a return spring, so that the liquid in the container is a suction tube or a primary valve. After being sucked up and pressurized by the cylinder,
In a push-type dispenser that is discharged through a secondary valve and an outflow passage of a piston and a nozzle head, and the nozzle head is conveyed and locked while being locked in a push-in position together with the piston, the return spring has a large number of continuous springs. When the elastic piece of, the nozzle head and the piston are locked in the push-in position,
A push-type dispenser characterized by being integrally formed with a valve retainer for forcibly pressing the primary valve against the valve seat and molded from plastic. 6. A bottle cap is attached to the container, and the piston slides in the cylinder in conjunction with the pushing of the nozzle head against the biasing force of the return spring, so that the liquid in the container is suction tube. , Sucked up by the cylinder through the primary valve and pressurized, and then discharged through the outflow passage of the piston and nozzle head through the secondary valve, and the nozzle head is locked together with the piston in the push-in position for conveyance,
In the push type dispenser exhibited, the nozzle head and piston are integrally molded from thermoplastic; the nozzle head has an opening in the ceiling wall above the piston; the nozzle head opening is closed with a lid; the nozzle head lid The secondary valve is integrally formed of thermoplastic with a secondary valve spring that is expandable and contractible in the axial direction of the piston, and the return spring is locked at a position where the nozzle head and the piston are pushed. At this time, the primary valve is integrally formed with a valve retainer for forcibly pressing against the valve seat, and the cylinder is molded with a suction tube at the lower end to form a stepped shape from the thermoplastic. Molded; A negative pressure prevention hole extending in the axial direction is formed in the stepped part of the cylinder, and the chaplet through which the piston is inserted Fixed to the upper end of the binder; the chaplet is molded from a thermoplastic with an integral skate-like seal that abuts the step on the outer surface of the piston to define the initial position of the piston and slide on the outer surface of the piston. And a push-type dispenser in which the primary valve and bottle cap are molded from a thermoplastic. 7. A suction valve is integrally provided at the lower end, which is molded into a stepped shape from a thermoplastic, and has a negative pressure preventing hole extending in the axial direction in the stepped portion, and a primary valve of the thermoplastic is provided. A built-in cylinder, a bottle cap that is molded from thermoplastic and that mounts the cylinder to the container, a secondary valve that is built in, a piston that is molded from thermoplastic and slides in the cylinder, and molded from thermoplastic The return spring, which is built into the cylinder and biases the piston outward, is integrally molded with the piston from thermoplastic, and the piston slides in the cylinder by being pushed against the biasing force of the return spring. Then, the liquid in the container is sucked up and pressurized by the cylinder through the suction tube and the primary valve,
The nozzle head that flows out through the outflow passage of the piston and nozzle head through the secondary valve in the piston, and is fixed to the upper end of the cylinder and engages with the pushed nozzle head to lock the nozzle head and piston in the pushed position. A thermoplastic chaplet, the nozzle head having an opening in the ceiling wall above the piston; the nozzle head opening being closed by a lid; the nozzle head lid, the secondary valve being the piston axis Is integrally molded from thermoplastics with a secondary valve spring that can expand and contract in the direction, and the return spring allows the primary valve to act as a valve seat when the nozzle head and piston are locked in the push-in position. A valve retainer forcibly pressing is integrally provided, and the chaplet comes into contact with a stepped portion provided on the outer surface of the piston so that the initial position of the piston is reached. A push-type dispenser that has a limited locating position and is integrally provided with a skate-shaped seal that is slidable on the outer surface of the piston.