JP2556685Y2 - dispenser - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a dispenser,
In particular, the present invention relates to a dispenser configured to discharge contents from a discharge port to the outside by pressing a push button.

[0002]

2. Description of the Related Art For example, some emulsion or lotion containers are provided with a dispenser for discharging the contents by pressing a push button provided on the head. According to the dispenser-equipped container, it is not necessary to tilt the container to take out the contents, so that the container is easy to handle, and a fixed amount of contents can be taken out every time by operating the push button.

FIG. 7 is a sectional view showing the structure of a conventional dispenser 1. As shown in FIG. In the figure, 2 is a push button integrated with the discharge nozzle 3, 4 is a screw cap, 5 is a stem, 6 is a tank, 7 is a coil spring, 8, 9 are ball valves functioning as check valves, and 10 is a pipe. Is shown.

[0004] The dispenser 1 is attached to a container 11 by screwing a screw cap 4 into a container opening. The stem 5, the tank 6 and the like form a fluid passage extending from the pipe 10 to the discharge nozzle 3 inside the dispenser 1.

When the push button 2 is pressed against the elastic biasing force of the coil spring 7, the stem 5 is displaced, and the contents filled in the fluid passage are pressurized. Since the lower part of the cylinder 6 is closed, the contents are discharged from the discharge nozzle 3.

When the pressing operation of the push button 2 is stopped, the push button 2 is urged by the coil spring 7 to return to the original position. At this time, since the upper portion of the stem 5 of the ball valve 9 is closed, external air does not enter the dispenser 1 from the discharge nozzle 3, and the contents in the container 11 pass through the pipe 10 and the dispenser 1. , And was prepared for the next ejection operation.

[0007]

In the dispenser 1 having the above structure, after the operation of taking out the contents is completed, the ball valve 9 is operated.
Is closed, the contents remain in the discharge channel 12 extending from the ball valve 9 to the discharge port 3a.

In the conventional dispenser 1, the discharge flow path 12 is configured such that the contents simply flow at the time of discharge. Therefore, when the viscosity of the contents is low, the remaining contents are discharged from the discharge port 3a. There is a problem that the liquid leaks out, that is, so-called dripping occurs.

The present invention has been made in view of the above points, and has as its object to provide a dispenser capable of preventing the occurrence of dripping.

[0010]

In order to solve the above-mentioned problems, in the present invention, a tank fixed to a container filled with contents and a tank inner wall are liquid-tight by pressing a push button portion. a stem slides downwardly to eject the contents from the discharge nozzle communicating with the, provided inside of the the tank
The upper part has a smaller diameter than other parts,
And a flange-shaped upper end is formed at the tip of this step.
And secure the flow of contents at the bottom of the step
Forms a configured flange portion to said stem <br/> and poppet which is relatively inserted Configurations within the stem with the downward operation of stages formed in the poppet top
Disposed movably in the difference portion Rutotomoni outer wall portion stearate
When the stem moves downward, it comes into contact with the lower end of this step , allowing the contents to flow from the tank into the stem and moving the stem upward. A valve member that abuts on the upper end of the step when sealing the stem and the tank in a liquid-tight manner while permitting the movement of the stem, and the tank is provided with the contents. A dispenser is characterized by comprising a check valve for preventing backflow, and a spring member disposed in the tank and for urging the stem upward.

[0011]

According to the dispenser constructed as described above, when the stem moves down (ie, when the push button is operated to discharge the contents), the valve member moves the contents from the tank into the stem. The contents are discharged from the discharge nozzle to allow the inflow.

On the other hand, when the stem moves upward, the valve member allows the stem to move while sealing the stem and the tank in a liquid-tight manner. At this time, the outer wall of the valve member is liquid-tight with the inner wall of the stem.
Because of the sliding contact , a suction force acts on the stem as the stem moves, and the contents remaining in the discharge nozzle communicating with the stem are sucked into the stem by this suction force, causing dripping from the discharge nozzle. Can be prevented.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a sectional view showing a dispenser 20 according to an embodiment of the present invention. Dispenser 20
In brief, it comprises a stem 21, a tank 22, a coil spring 23, a cap 24, and a valve member 25 which is a main part of the present invention. This dispenser 2
Numeral 0 is attached to a container 27 filled with a viscous liquid content such as shampoo.

The stem 21 is a resin molded product, and is provided with a discharge nozzle 26 (having a push button 26a) at an upper portion thereof. The interiors of the stem 21 and the discharge nozzle 26 are hollow, and form a discharge passage 26b through which contents pass. A piston 28 is formed at an outer peripheral position of a lower end of the stem 21, and a valve member 2 described later is formed on an upper portion thereof.
5 is formed with a step portion 28b which is in contact with the lower end portion. The valve portion 28 a formed on the piston 28 is configured to slide in a liquid-tight manner with respect to the inner wall 22 a of the tank 22.
Further, unlike the conventional dispenser 1 (see FIG. 7), the dispenser 20 according to the present invention has a configuration in which a ball valve is not disposed above the stem 21 and the stem 21 communicates with the direct discharge passage 26b. Has become.

The tank 22 has a structure in which the piston 28 formed on the stem 21 is in sliding contact with the inner wall 22a as described above, and the stem 21 can slide vertically and liquid-tight within the tank 22. I have. A cap 24 is provided at the upper end of the tank 22, and the dispenser 20 is fixed to the container 27 by screwing the cap 24 onto a screw 27 a formed in the container opening. A pipe 32 is attached to an opening 33 formed at the lower part of the tank 22, and the contents filled in the container 27 enter the tank 22 through the opening 33. Further, a ball valve 31 is provided in the opening 33, and the ball valve 31 functions as a check valve for preventing the contents from flowing backward from the tank 22 to the container 27.

The upper end of the coil spring 23 contacts the lower end of the stem 21, and the lower end contacts the poppet 29. The coil spring 23 elastically urges the stem 21 upward in the drawing.

Further, the poppet 29 is disposed in the tank 22. The poppet 29 has a rod-like shape, and has a flange portion 29a that protrudes radially on the outer peripheral portion as shown in a cross section in FIG. At a position near the upper end 29c of the poppet 29, a step 29b to which a valve member 25 described later is attached is formed.

The valve member 25 is an essential part of the present invention, and has a step portion 29b formed on the poppet 29 described above.
It is arranged in. The valve member 25 is formed of, for example, silicone rubber, a flexible resin, or the like, and the poppet 2 is configured to be able to move up and down in the step portion 29b.
9 (they are inserted in a loose-fit state). The outer peripheral portion of the valve member 25 is configured to abut on the inner wall 21a of the stem 21 in a liquid-tight manner, and the valve member 25 can relatively slide on the inner wall 21a as the stem 21 moves.

In particular, when the valve member 25 is at the upper limit position in the step portion 29b, the step 28b formed on the piston 28 is connected to the lower end of the valve member 25 as shown in an enlarged view in FIG. The valve member 25 comes into contact with the upper end 29 c of the poppet 29 by the urging force of the coil spring 23. At this time, since the valve member 25 comes into contact with the upper end portion 29c of the poppet 29 with the elastic biasing force of the coil spring 23 as described above, the valve member 25 comes into strong contact with the upper end portion 29c, and the liquid tightness between the two is high. It has become something. Therefore, when the valve member 25 is at the upper limit position, the valve member 25 and the upper end portion 29c are engaged in a liquid-tight manner, and the outer peripheral portion of the valve member 25 is in liquid-tight contact with the inner wall 21a of the stem 21. By contacting,
The stem 21 and the tank 22 are liquid-tightly defined.

The valve member 25 is formed by integrally molding a rubber material or a resin, and has a simple shape. Therefore, the valve member 25 can be easily formed. The cost of the dispenser 20 does not increase unnecessarily.

Next, the operation of the dispenser 20 configured as described above will be described. FIG. 1 shows a dispenser 2 in an unused state (hereinafter referred to as a normal state).
0 is shown.

In the normal state, the coil spring 23 is extended, and the stem 21 is connected to the coil spring 23.
, And the stem 21 is located at the upper limit position.

In this normal state, the valve member 25 is in contact with the tip portion 29c of the poppet 29 by the urging force of the coil spring 23 via the piston 28, so that the stem 21 and the tank 22 are liquid-tightly defined. ing. Thereby, the airtightness of the container 27 is maintained, and the deterioration of the contents filled in the container 27 is prevented.

Next, the operation when the dispenser 20 is operated will be described.

To remove the contents from the container 27 using the dispenser 20, the push button 26a is pressed downward. Although the stem 21 is moved downward by this pressing operation,
As described above, the outer peripheral portion of the valve member 25 is in sliding contact with the inner wall 21a of the stem 21, and the valve member 25 is
9, the valve member 25 first moves down inside the stepped portion 29b as the stem 21 moves down. By this moving operation, the valve member 25 is separated from the distal end portion 29c, and subsequently engages with the lower end portion 29b- ₁ of the step portion 29b, thereby restricting the moving operation.

In this state, when the stem 21 is further moved downward , the valve member 25 engages with the lower end portion 29b- ₁ of the step portion 29b to restrict the movement operation. The stem 21 slides relative to the inner wall 21a of the stem 21, and the stem 21 further continues to move downward. This state is shown in FIG.

When the stem 21 moves down as described above, a space formed by the stem 21 and the tank 22 (indicated by an arrow A in the drawing. This space is filled with contents. ) Is smaller. The opening 33 formed at the lower end of the tank 22 is closed by the second valve 35 as described above.

Further, although the valve member 25 is located at the lower limit position in the step portion 29b, as described with reference to FIG. 4, the poppet 29 is formed with the radially protruding flange portion 29a. Even when the valve member 25 is at the lower limit position in the step portion 29b, the state in which the stem 21 and the tank 22 are communicated is maintained.

Therefore, the contents pressurized by the downward movement of the stem 21 pass through the valve member 25, advance into the stem 21, and are discharged from the discharge nozzle 26 to the outside. Push button 26a
The contents of the container 27 are discharged from the discharge nozzle 26 by the above-described series of operations of the dispenser 20 by pressing the
Can be discharged.

FIG. 5 shows a state where the stem 21 is pressed to the lower limit. At the stage when the operation of discharging the content is completed, the content still remains in the discharge channel 26b (this content is referred to as a residual content 36).

Subsequently, when the pressing operation of the push button 26a is released from the state shown in FIG. 5, the stem 21 starts to move upward due to the elastic restoring force of the coil spring 23. This allows
The volume of the space A formed in the tank 22 increases, and the pressure in the space A becomes negative.

In addition, when the stem 21 moves upward,
The valve member 25 in sliding contact with the inner wall 21a of the stem 21 is also urged upward. Thereby, the valve member 25 is connected to the poppet 29.
, And the stem 21 and the tank 22 are again liquid-tightly defined. After this state, the stem 2
1 continues to move upward due to the elastic restoring force of the coil spring 23. FIG. 6 shows a state where the stem 21 is moving upward.

In the state where the stem 21 is moving upward, the inside of the space A formed in the tank 22 has a negative pressure as described above, so that the ball valve 31 rises, and thus the ball valve 31 The filled contents flow into the tank 22 through the pipe 32, and thereby the contents are filled in the tank 22.

Here, attention is paid to the relationship between the stem 21 and the valve member 25 when the stem 21 is moving upward. As described above, the valve member 25 is connected to the tip portion 29 of the poppet 29.
c, the valve member 25 and the tip 29
c constitutes a valve mechanism that makes the stem 21
Liquid-tight. Now, the above-described configuration is used with the stem 21 as a cylinder, the valve member 25 and the tip 2.
Assuming that the valve mechanism constituted by the valve 9c is a piston, the movement of the stem 21 is such that the piston formed by the valve member 25 and the distal end portion 29c is relatively moved in the stem 21 which is a cylinder .
6 is equivalent to moving in the arrow X direction.

Therefore, the remaining contents 36 remaining in the discharge flow path 26b are separated from the stem 21, the valve member 25, and the tip portion 29.
c is sucked by the piston-cylinder mechanism that
It is possible to reliably prevent the dripping of the liquid into the stem 21. Further, since the remaining contents 36 sucked into the stem 21 are discharged in the next discharging operation, there is no problem such as deterioration of the contents.

The upward movement of the stem 21 is continued until the stem 21 shown in FIG. 1 reaches the upper limit position. Therefore,
In the normal state, the valve member 25 is located at the upper limit position.

[0038]

According to the present invention, as described above, the contents remaining in the discharge flow path are sucked into the stem when the stem moves upward when the pressing operation is released, so that the occurrence of liquid dripping is ensured. It has such features that it can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a normal state of a dispenser according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing the vicinity of a piston in a state where a stem is at an upward movement position.

FIG. 3 is a cross-sectional view showing a state in which a stem is being moved downward in the dispenser shown in FIG. 1;

FIG. 4 is a cross-sectional view of a bopet.

FIG. 5 is a cross-sectional view showing a state in which the stem is operated to a lower limit position in the dispenser shown in FIG. 1;

FIG. 6 is a cross-sectional view showing a state where the stem is moved up in the dispenser shown in FIG. 1;

FIG. 7 is a cross-sectional view illustrating an example of a conventional dispenser.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Dispenser 21 Stem 22 Tank 23 Coil spring 24 Cap 25 Valve member 26 Discharge nozzle 26a Push button 26b Discharge flow path 27 Container 28 Piston 28b Step 29 Poppet 29a Flange 29b Step 29c Tip 31 Ball valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A tank (22) fixed to a container (27) filled with contents, and the tank is operated by pressing a push button (26a).
(22) A stem (21) that slides down the inner wall in a liquid-tight manner and discharges the contents from the connected discharge nozzle (26 ).
And is provided in the tank (22) , and has a small diameter
To form a step (29b), and
A flanged upper end (29c) is attached to the tip of the step (29b).
Formed, and the content is formed at the lower portion of the step portion (29b).
A collar (29a) configured to ensure the flow of goods
Formed and, the stem poppet which is relatively inserted Configurations within the stem (21) with the downward operation of the (21) (29), formed in the poppet (29) the upper step Part (29b)
Rutotomoni outer wall is a stem is disposed in a movable state to the
The inner wall (21) and (21a) are in sliding contact with the liquid-contact Sai該stepped portion said stem (21) is operated downward the lower end of (29 b) and (29 b _-1) those, the contents are The tank (2
2) while allowed to flow into the stem (21) within the step portion when the stem (21) is operated upward (2
9b) is brought into contact with the upper end (29c) of the stem (21).
The stem (21) and the tank (2 ) are allowed to move.
2) a valve member (25 ) for liquid-tightly sealing the tank (22), which is disposed in the tank (22);
A check valve (31) for preventing the contents from flowing back into the container (27) ; and a spring member (23 ) disposed on the tank (22 ) for urging the stem (21) upward. ) And a dispenser composed of