JPH09278052A - Foaming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foaming device which presents a favorable foam quality, and is less prone to generate liquid drooling. SOLUTION: This foaming device is constituted in such a manner that a liquid being radially dispersed from a discharging port 8a and discharged into a mist state, is made to collide with the internal wall of a foaming cylinder 9c, and is expanded and discharged. In this case, after the liquid on the outermost periphery of the liquid being radially dispersed is reflected by the foaming cylinder 9c, crosses with the liquid being reflected by the wall surface being confronted to each other, at a point P, and the length of the foaming cylinder 9c is set so that the point P may be located at a place being closer to the discharging port 8a than the leading end surface 9d of the foaming cylinder 9c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foaming device for foaming an internal solution and discharging it.

[0002]

2. Description of the Related Art Conventionally, as this type, for example, there is one such as a pump dispenser. This pump dispenser has, as a discharge mode, a stream mode in which the inner solution is linearly discharged, and a spray mode in which the inner solution is atomized. There is a spray mode in which the solution is discharged radially from the discharge port, and a foam mode in which the inner solution is discharged in the form of bubbles.

[0003]

However, in such a conventional device, the foam quality in the foam mode may not be good and liquid dripping may occur.

[0004] Therefore, an object of the present invention is to provide a foaming device which has good foam quality and is less likely to cause dripping.

[0005]

In order to achieve the above object, the invention as set forth in claim 1 collides a liquid radially diffused from a discharge port and discharged in a mist with an inner wall of a foaming cylinder. In the foaming device for foaming and discharging, the outermost liquid of the radially diffused liquid is reflected by the foaming cylinder and then intersects with the liquid reflected by the wall surfaces facing each other. The foaming device is characterized in that the length of the foaming cylinder is set so as to be located closer to the discharge port side than the tip end surface of the foaming cylinder.

According to a second aspect of the present invention, in addition to the structure according to the first aspect, the foaming cylinder is slidably arranged in the front-rear direction with respect to the discharge port portion and is separated from the discharge port portion. Liquid ejected from the ejection port is collided to form bubbles while being advanced in the direction, and ejected from the ejection port while retracted in a direction approaching the ejection port. The liquid is set so as not to collide with the liquid, and the intersecting point is located near the tip surface of the foaming cylinder.

[0007]

Embodiments of the present invention will be described below.

FIGS. 1 to 6 show an embodiment of the present invention.

First, the structure will be described. In FIG. 5, reference numeral 1 is a pump dispenser.
It is attached to the opening 2a of the container 2 in which a content liquid containing a certain amount of a surfactant (for example, 8 to 20%) is stored, and by pulling the trigger lever 3, a predetermined amount of the content liquid is pumped out and discharged. It has become.

This pump dispenser 1 has a valve insert 5 projecting from the tip of the dispenser body 4, and an inlet 6 through which the content liquid is discharged at a predetermined pressure on the base end side of the valve insert 5. Further, a discharge mode switching device 7 having a function as a "foaming device" is provided at the tip of the main body 4.

The discharge mode switching device 7 is capable of switching between a fog mode and a bubble mode, and has a slide valve 8 fitted in the valve insert 5 and a foam adapter mounted on the slide valve 8 so as to be movable back and forth. 9 and 9.

The slide valve 8 has a discharge port 8a formed in the center thereof, and the liquid content passing from the inlet 6 of the dispenser body 4 between the valve insert 5 and the slide valve 8 is shown in FIG. As shown, the discharge port 8
It is adapted to be radially diffused at an angle θ from a and ejected. A locking projection 8b is formed on the slide valve 8, and the slide valve 8 is mounted by being locked to a locked projection 5a formed on the outer peripheral surface of the valve insert 5. It is like this.

The foam adapter 9 is mounted on the valve insert 5 so as to be slidable forward and backward as shown in FIGS. 1 and 2, and in the retracted state as shown in FIG. , The second engaged protrusion 9b is engaged with the first engaged protrusion 8d formed at the base of the protrusion 8c of the slide valve 8 to be in a stopped state, and in the forward state as shown in FIG.
Is the second part formed at the tip of the slide valve protrusion 8c.
It is adapted to be brought into a stopped state by engaging with the engaged projection 8e. The foam adapter 9 is provided with a foam cylinder 9c for foaming the discharged liquid flow when the mist-like liquid discharged from the discharge port portion 8a collides in the forward movement state as shown in FIG. There is. Further, in this forward movement state, the air inflow path 10 through which air flows in is formed as shown by the arrow X.

With such a configuration, as shown in FIG. 2, when the foam adapter 9 is retracted to set the fog mode and the trigger lever 3 is pulled, the content liquid in the container 2 has a predetermined pressure and the inlet port. 6 and a predetermined angle θ from the discharge port 8a.
Then, it is radially diffused and discharged in the form of mist.

Further, as shown in FIG. 1, the foam adapter 9
When the bubble mode is advanced to set the bubble mode, the liquid discharged from the discharge port 8a collides with the inner wall of the foaming cylinder 9c and is disturbed, and the air flowing in from the air inflow passage 10 due to negative pressure is also disturbed. It is mixed in the liquid and is discharged in the form of bubbles.

The dimensions of each part of the structure are set as follows. Pump dispenser 1 generally required in the market
In the case of household detergent, spray paste, etc., the spraying area is often required to have a diffusion range of about Φ250 to 300 mm at a distance of 250 to 300 mm from the tip of the dispenser 1.
In order to satisfy this condition, in the case where the spraying is performed by the internal pressure of ² to 8 kgf / cm ² like the dispenser 1, the size of the discharge port 8a is 1.5 ≧ 2 × S1 / D1 + D2 ≧ 0.6. The range S1 = 0.4 to 0.7 mm D1 = 0.4 to 0.8 mm D2 = 0.4 to 0.8 mm is particularly preferable.

Here, S1 is the entire length of the discharge port 8a, D1 is the inlet diameter of the discharge port 8a, and D2 is the outlet diameter of the discharge port 8a.

In general, D1 and D2 often have the same value, but D1 <D2 (for example, D1 = 0.5 mm, D
2 = 0.6 mm), there is also a method of consciously suppressing the spread. In order to obtain the discharge port portion 8a capable of switching the mist and foam modes by sliding the foam adapter 9 under the above conditions, experimentally, when G1 ≧ 0, 1.7 ≦ AD
/ G1, G1 ≦ 3.5 mm, 8 mm ≧ AD ≧ 5 mm
Has been found to be good. G1 <
0 is acceptable.

Here, G1 is the distance between the end surface 9d of the foam cylinder and the end surface of the discharge port 8a in the fog mode, and AD is the foam cylinder 9.
c diameter.

For example, AD <5 mm, G1> 3.5 mm
Then, even in the fog mode, it foams and the bubbles are hard to scatter. Also,
When AD> 9 mm, bubbles are less likely to be generated, the air content of the bubbles is low, and the foam quality is poor. When the above conditions and are satisfied, it is possible to switch between the fog and the foam mode and foam in the foam mode, but in this range, the air content is low and the foam quality is watery, and it easily drops after spraying, In addition, the disturbance in the foaming mode is not sufficient, and liquid dripping may easily occur from the foam cylinder end surface 9d.

Therefore, in order to solve such a problem, the distance (G) between the rear end surface 9e of the foaming cylinder 9c and the end surface of the discharge port 8a in the forward movement state of the foaming adapter 9 (in the foaming mode).
2) and the foam cylinder 9c total length (AL) were set as follows.

That is, G2 is 3.5 mm ≧ G2> 0
Is particularly preferable, especially in the range of G2 = 1 to 3 mm.

For example, when G2 is negative, the amount of inflow of air is insufficient, the air content is low, the quality of bubbles is deteriorated, and the flight distance of bubbles is shortened. Further, when G2 exceeds 3.5 mm, the fog interferes with the rear end of the foaming cylinder 9c to cause liquid pooling and liquid dripping.

In AL, the outermost liquid in the liquid radially diffused from the discharge port 8a is reflected by the foaming cylinder 9c and then intersects with the liquid reflected by the wall surfaces facing each other. P is set to be located in the vicinity of the discharge port portion 8a side from the tip surface 9d of the foaming cylinder 9c. In this embodiment, a range of 3 mm ≦ AL ≦ 10 mm, particularly AL =
A range of 4 to 7 mm is good.

For example, if AL is shorter than 3 mm, the mist is not sufficiently disturbed and liquid drops easily occur from the tip surface 9d of the foaming cylinder.
On the other hand, even if AL exceeds 10 mm, the foam adapter 9 only becomes large, which does not lead to improvement in foam quality. In particular, in the fog mode, it is necessary to prevent the liquid from colliding with the foam cylinder 9c. Therefore, if the AL dimension is long, it is necessary to increase the movement amount of the foam adapter 9, and so on.
It is desirable that the L dimension be as short as possible within the range in which the foam quality is optimal, and as described above, the foaming cylinder 9c is positioned so that the intersecting point P is located closer to the discharge port 8a side than the foaming cylinder tip surface 9d. This can be achieved by setting the length of.

Therefore, by setting the dimensions of each part so as to satisfy the above conditions (1) to (5), a better foam quality than before can be obtained without damaging the function of switching between fog and foam mode, and liquid dripping occurs. It will be difficult.

The judgment of the foam quality is made by the foaming ratio derived as follows. That is, as shown in FIG.
The flat petri dish 11 having a predetermined volume is washed with ethanol to be degreased, dried and then weighed by an electronic balance. Then, as shown in FIG. 6A, the flat petri dish 11
Bubbles are continuously discharged from the pump dispenser 1, and when the bubbles are filled in the petri dish 11 and overflow, the discharge is terminated and the surface is immediately scraped off with the glass plate 12. And
After leaving it for about 30 seconds, the liquid outside the flat petri dish 11 is wiped off. This weight is weighed as shown in FIG.
To measure. The discharge amount is obtained by subtracting the weight of the flat petri dish 11 from the measured value.

From this, the foaming ratio is calculated from the foaming ratio (n) = flat petri dish volume (cm ³ ) / discharge amount (g).

In this embodiment, the foaming ratio (n) is tripled or more by the discharge mode switching device 7 dimensioned as described above, and the foam quality becomes good.

In the above embodiment, the discharge mode switching device 7 capable of switching between the mist and the foam mode is used as the foaming device, but the invention is not limited to this, and only the foam is formed instead of the switching type. Of course, a device capable of

[0031]

According to the first aspect of the invention, the outermost liquid among the radially diffused liquids is reflected by the foam cylinder and then intersects with the liquids reflected by the wall surfaces facing each other. Since the length of the foaming cylinder is set so that the point to be located is located closer to the discharge port side than the front end surface of the foaming cylinder, the liquid drips are less likely to occur with good foam quality.

According to the invention described in claim 2, according to claim 1
In addition to the effect described in (1), by setting the intersection of the reflection liquid so that it is located near the tip surface of the foam cylinder, the total length of the foam cylinder can be set as short as possible with a length that can produce good quality foam. Especially, it is particularly effective for the type in which the foam cylinder is slid back and forth and the mode is switched between fog and foam mode.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 3 in a bubble mode showing an embodiment of the present invention.

FIG. 2 shows the same embodiment as FIG. 1 in a fog mode.
FIG.

FIG. 3 is a front view of a discharge mode switching device showing the same embodiment.

FIG. 4 is an enlarged cross-sectional view of a discharge port portion showing the same embodiment.

FIG. 5 is a front view of the pump dispenser with a partial cross section showing the embodiment.

FIG. 6 is an explanatory diagram showing how to derive a foaming ratio, showing the same embodiment.

[Explanation of symbols]

 7 Discharge mode switching device (foaming device) 8a Discharge port part 9c Foaming cylinder 9d Tip surface P Intersection point

Claims (2)

[Claims] 1. A foaming device for causing a liquid, which is radially diffused and ejected in a mist state from a discharge port, to collide with an inner wall of a foaming cylinder to foam and eject the liquid, in the liquid diffused in a radial direction. After the outermost liquid is reflected by the foam cylinder, the foam cylinder is arranged so that the point where the liquid intersects with the wall surfaces facing each other is located closer to the discharge port than the tip end surface of the foam cylinder. A foaming device characterized in that the length of the foam is set. 2. The liquid ejected from the ejection port portion in a state in which the foaming cylinder is slidably arranged in the front-rear direction with respect to the ejection port portion and is advanced in a direction away from the ejection port portion. Are collided to form bubbles, and are set so as not to collide with the liquid ejected from the ejection port portion in a state of retracting in a direction approaching the ejection port portion. The foaming device according to claim 1, wherein the foaming device is located near the front end surface of the foaming cylinder.