JP2550217Y2 - Manual trigger type dispenser - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention is a manual trigger which is attached to the mouth of a container and draws the liquid in the container into a cylinder, pressurizes and discharges the liquid in the container by reciprocating a piston interlocked with pulling of the trigger. It relates to a type dispenser.

[0002]

2. Description of the Related Art Due to the environmental problem of destruction of the ozone layer by Freon gas, a manual trigger type dispenser which pressurizes and discharges a liquid by operating a piston pump without using Freon gas has attracted attention.

[0003] Usually, this type of dispenser is detachably mounted by screwing a bottle cap onto an external thread of a container containing a liquid.

The piston reciprocates in the cylinder in conjunction with the pulling (pushing) of the trigger against the return spring,
When the piston is returned from the pushed-in position to the initial position, the cylinder is depressurized. Then, the primary valve is opened and the secondary valve is closed. Then, the liquid in the container is sucked into the cylinder via the suction tube and the primary valve.
Thereafter, when the piston is pushed in against the biasing force of the return spring, the liquid in the cylinder is pressurized, and the pressurized liquid opens the secondary valve and flows out from the outlet.

Usually, in this type of dispenser, a nozzle is extended horizontally, a cylinder is extended obliquely below the nozzle, and a trigger is extended from the dispenser body in a trigger direction (for example, US Pat. No. 4,702,252, US Pat. 4480768
issue). A compression coil spring made of metal is built in the cylinder as a return spring.

[Problems to be solved by the invention]

However, since the metal return spring is built in the cylinder and comes into contact with the liquid, the return spring corrodes depending on the type of the liquid, and the liquid that can flow out is limited.

Further, due to the presence of the return spring, the dead space in the cylinder increases, and the outflow amount per unit stroke decreases.

If the return spring is disposed at a position separated from the liquid, the return spring does not corrode and the dead space is eliminated. However, in the known manual trigger type dispenser, there is no suitable location for the return spring to be isolated from the liquid.

It is an object of the present invention to provide a manual trigger-type dispenser in which a return spring is provided by defining a space isolated from a liquid.

[0010]

In order to achieve this object, according to the present invention, a nozzle and a cylinder are extended so as to be separated from each other and substantially parallel to each other, and a pair of side walls are formed from an upper edge of the dispenser main body. Hanging over the cylinder. A space surrounded by a pair of side walls, a nozzle lower surface, and a cylinder upper surface is defined, and a return spring is disposed in this space.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a manual trigger type dispenser 10 according to the present invention includes a cylinder 12, a piston 14 reciprocable in the cylinder, a trigger 16 capable of interlocking with the piston, and a dispenser. A body 18, the cylinder being molded as part of the dispenser body.

The dispenser body 18 has a substantially U-shaped upper half 18U having a pair of side walls 19 hanging down from an upper edge, and a cylindrical lower half 18L extending substantially vertically downward from the upper edge of the upper half. A cylinder 12 is provided on the left side of the lower half and between the side walls of the upper half.

The cylinder 12, the piston 14, the trigger 16, and the dispenser body 18 are all formed by injection molding from plastic.

The hollow fitting cylinder 20 having the fitting projection is a cylinder.
At the upper part of 12, the dispenser is formed integrally with the upper half 18U of the main body substantially parallel to the cylinder, and the nozzle 22 is fitted to the fitting cylinder. The nozzle 22 has a hollow shape having an outflow passage 23,
A valve seat for the secondary valve is formed at the tip. A secondary valve is provided at the tip of the nozzle.
Is disposed in the upper half 18U of the dispenser main body so as to be able to advance and retreat.

Pivot holes are formed in the left and right side walls of the nozzle 22. The upper end of the trigger 16 is formed in a bifurcated fork shape to generate elasticity, and a pivot pin 17 extends from an inner wall facing the upper end. The pivot pin 17 is engaged with the pivot hole in the side wall of the nozzle by utilizing the elasticity of the trigger 16 so that the trigger can swing to the nozzle 22, in other words, the dispenser body 18. It is pivoted.

The configuration for pivoting the trigger 16 is not limited to the above, and the trigger may be pivoted directly to the dispenser body 18. Further, in the embodiment, the separate nozzle 22 is
The nozzle is attached to the lower half 18L of the dispenser main body with the interposition of the nozzle, but the nozzle may be formed integrally with the lower half of the dispenser main body.

When the bottle cap 25 is screwed onto the external thread of the mouth 29 of the container 28, the dispenser main body 1
8, that is, the dispenser 10 is detachably attached to the container.

In the present invention, as described above, the nozzle 22,
The cylinder 12 is provided substantially parallel, and a pair of side walls 19 hang down from the upper edge of the dispenser body so as to cover the nozzle and the cylinder. Therefore, as can be clearly seen from FIG. 2 in addition to FIG. 1, a space 30 is defined which is surrounded by a pair of side walls on the left and right sides, a nozzle lower surface on the upper and lower sides, and a cylinder upper surface.

The space 30 is formed without communication with the cylinder 12, and is isolated from the liquid. Therefore, this space 30
If the return spring 32 is disposed in the vicinity, the return spring does not come into contact with the liquid, and there is no need to consider corrosion of the return spring. Therefore, a return spring made of metal can also be used, and the dispenser 10 can be used for outflow of a wide range of liquid.

Further, since the return spring 32 is not built in the cylinder 12, the generation of a dead space due to the presence of the return spring is prevented, and a decrease in the outflow amount per unit stroke is prevented. .

If the extension 12a is extended from the upper surface of the cylinder,
The space 30 for the return spring 32 can be widely defined.

As shown in FIG. 1, FIG. 2 and FIG. 3A, in the embodiment, the return spring 32 is made of an elastic resin such as acetal resin which makes the elasticity of the plastic a spring force. Five hollow pipes 33 molded from plastic are arranged side by side. The hollow pipe 33 (return spring 32) is inserted and arranged from the left end, which is the only opening of the space 30,
The rib 16a for preventing the hollow pipe 33 from dropping is
Are integrally formed on the side wall of the helmet.

When the trigger 16 is pulled, the trigger swings around the pivot pin 17 as shown in FIG.
While the rib 16a of the trigger presses and deforms the hollow pipe 33, it pushes the piston 14 to pressurize the liquid in the cylinder 12. Then, the pressurized liquid opens the secondary valve and opens the nozzle cap
Effluent from 24 orifices. When the traction force of the trigger 16 is removed, the piston 14 and the trigger are returned to the initial positions by the elasticity of the hollow spring 33 due to the deformation.

As shown, plastic hollow pipe
If the return spring 32 is formed from 33, various elastic (spring force) return springs can be easily obtained by changing the thickness, diameter, arrangement, number, etc. of the hollow pipes.

The shape of the hollow pipes 33 is not limited to the illustrated one, but may be an ellipse, a rectangle, or the like, or may be arranged in an upright state or connected and arranged. Further, FIG.
As shown in (B) and (C), the return spring 32 is a corrugated plate 133 in which a large number of corrugated portions are integrally formed, or an assembly 233 in which T-shaped legs are integrally formed before and after the hollow pipe. Is also good.

Since the return spring 32 does not come into contact with the liquid, the return spring 32 may be made of metal.
3 (see FIG. 3D) may be used as the return spring 32.

In a conventional dispenser, generally, a metal compression coil spring is built in a cylinder as a return spring, and only the return spring among the constituent members is made of metal. Since plastic and metal are mixed, when disposing the dispenser after use, the dispenser is disassembled, the return spring is removed, and then the dispenser is dissolved, so that the dispenser can be easily disposed of. Can not be done.

On the other hand, in the present invention, since the return spring is formed of plastic and all the constituent members can be made of plastic, the dispenser can be easily disposed of.

The above-described embodiment explains the present invention, and does not limit the present invention in any way, and includes all modifications and alterations within the technical scope of the present invention. Needless to say,

[0031]

[Effect of the invention] As described above, in the invention, the nozzle,
A cylinder is provided substantially parallel and a pair of side walls hang down from the upper edge of the dispenser body over the nozzle and cylinder. Therefore, a space surrounded by a pair of side walls on the left and right, a nozzle lower surface on the upper and lower sides, and a cylinder upper surface is defined without communicating with the cylinder. If a return spring is arranged in this space, the return spring is Separated from liquids. Therefore, there is no need to consider the corrosion of the return spring, and a wide range of liquid can flow out.

Further, since the return spring is not built in the cylinder, a dead space caused by the presence of the return spring is provided.
The generation of gas is prevented, and a decrease in the outflow amount per unit stroke is prevented.

By extending the extension from the upper surface of the cylinder, a wide space for the return spring can be easily secured.

If the return spring is formed of plastic, all the components can be made of plastic, and the dispenser can be easily disposed of.

If the return spring is formed from a hollow pipe made of elastic plastic, the thickness, diameter and diameter of the hollow pipe can be reduced.
By changing the arrangement, number, etc., return springs of various elasticity (spring force) can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a manual trigger-type dispenser according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the dispenser taken along line XX of FIG.

FIG. 3 is a perspective view of a return spring.

FIG. 4 is a side view of the trigger with a partial breakage of the dispenser during traction.

[Explanation of symbols]

 10 Manual trigger type dispenser 12 Cylinder 12a Extension on top of cylinder 14 Piston 16 Trigger 16a Trigger rib 18 Dispenser body 18U Upper half of dispenser body 18L Dispenser lower half of body 19 Dispenser Side wall of 20 fitting cylinder 22 nozzle 25 bottle cap 28 container 30 empty space 32 return spring 33 hollow pipe 133 corrugated plate 233 assembly 333 leaf spring

Claims (4)

(57) [Scope of request for utility model registration] A dispenser body is attached to an opening of a container containing a liquid to be discharged, and a dispenser body is provided.
The nozzle and cylinder are extended from the main body in the trigger direction with the nozzle facing up, and the piston reciprocates in the cylinder in conjunction with the pulling of the trigger that can swing against the return spring. As a result, the liquid in the container is sucked into the cylinder,
Manual trigger type dispenser that flows out under pressure
In the above, the nozzle and the cylinder are extended substantially in parallel away from each other, and a pair of side walls are formed from the upper edge of the dispenser body.
A manual trigger type dispenser characterized by defining a space surrounded by a pair of side walls, a nozzle lower surface, and a cylinder upper surface which hangs over a nozzle and a cylinder, and in which a return spring is disposed. . 2. The manual trigger-type dispenser according to claim 1, wherein the extension is provided on an upper surface of the cylinder. 3. The manual trigger type dispenser according to claim 1, wherein the return spring is formed of plastic. 4. The return spring according to claim 1, wherein a plurality of hollow pipes made of elastic plastic are juxtaposed, and a rib capable of pressing the hollow pipe at the tip is formed in the trigger. The described manual trigger-type dispenser.