JPH0221421Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drip container, and its purpose is to enable dripping of highly viscous liquid.

Infusion containers are widely used as containers for dispensing liquid drop by drop.

A typical configuration of this kind of container is to open a nozzle hole at the tip of the liquid storage cylinder and press the storage cylinder part, or to press a push button assembled at the base end of the storage cylinder. This increases the internal pressure and causes liquid to drip out from the nozzle hole.

With this configuration, during the dripping operation, air is introduced from the nozzle hole to prepare for the next operation by utilizing the negative pressure created inside when the storage cylinder elastically returns or when the push button returns to its original position. It is.

However, if the stored liquid has extremely high viscosity, the liquid will remain in the nozzle hole after the liquid is poured out, making it impossible for air to be introduced through the nozzle hole, making it impossible to eliminate the negative pressure inside the storage cylinder. There was a drawback that the liquid stopped dripping after several operations.

The present invention relates to a drip container devised to eliminate the above-mentioned conventional drawbacks, and includes a storage tube with a nozzle hole, a cylinder tube fitted into the base end of the storage tube, and a push button at the base end. It has an air passage communicating with the outside, a piston tube assembled into the cylinder tube, an elastic spring arranged between the piston tube and the cylinder tube, and a resilient spring installed in the opening at the tip of the cylinder tube. , a first valve piece that opens when the piston cylinder advances, and a second valve piece that is attached to the opening at the tip of the piston cylinder and opens when the piston cylinder retreats.

An embodiment of the present invention will be described below with reference to the drawings.

First, the storage tube 1 has a structure in which a thread 3 is provided around the outer periphery of the tip of a straight cylindrical main body 2, and a nozzle tube 4 is tightly screwed and assembled to the tip via a packing 5. The nozzle cylinder 4 has a cylindrical tip shape and has a nozzle hole 6 at its tip.

Next, the cylinder cylinder 7 has a structure in which an assembly cylinder 15 is connected to the tip of the main cylinder 8, and the main cylinder 8 is connected to the housing cylinder 1.
It has a cylindrical shape that is tightly assembled to the base end of the main body 2, but there is an outer flange 9 on the outer periphery of the base end that comes into contact with the base end of the main body 2.
is provided around the inner periphery of the tip, and an inner flange 10 is provided around the inner periphery of the tip.
Furthermore, a seal cylinder 11 is provided extending from the tip.

The inner periphery of the tip of the main body cylinder 8 is a thick wall portion 12, and a notch 13 is formed in a part of the inner periphery of the thick wall portion 12.
is provided, and a vertical strip 14 is attached to a part of the inner periphery.

The assembly cylinder 15 has a short cylinder shape with a bottom that is tightly externally assembled to the seal cylinder 11, and a suction hole 17 is opened in the center of the bottom wall 16.
8 is provided protrudingly.

In the embodiment shown in FIG.
A first valve piece 19 made of a soft material is disposed so as to come into contact with the tip end surface. The peripheral edge 19b is connected to the bottom wall 16 by the holding cylinder 20 that is tightly fitted into the fitting cylinder 18 and is connected to the bottom wall 16 through the leg piece 19c.
The disk portion 19a is held and fixed while maintaining the closed state, and the disk portion 19a deforms in a predetermined state to open the suction hole 17.

Further, in the embodiment shown in FIG. 2, the suction hole 17 is
A first valve piece 19 made of a soft material that closes the suction hole 17 and has a substantially ring-shaped hole in the assembly cylinder 15
The valve piece part 19e is provided in the shape of an inner flange at the tip of the short cylindrical part 19d that is tightly assembled on the outer periphery of the tip, and this valve piece part 19e maintains the closed state of the suction hole 17.
The suction hole 17 is opened in a predetermined state.

Further, in the embodiment shown in FIG. 3, a plate-shaped first valve piece 19 is disposed in response to the suction hole 17 opened in the center of the bottom wall 16, and the tip of this valve piece 19 is connected to the fitting cylinder 18. The base end of the elastic spring 21 that comes into elastic contact with the tip of the holding cylinder 20 that is tightly fitted to the outer periphery of the bottom wall 1
6 to maintain the closed state of the suction hole 17, and open the suction hole 17 against the elasticity of the elastic spring 21 in a predetermined state.

A seal ring 2 is provided on the inner flange 10 of the main body cylinder 8.
This seal ring 22 is mounted and fitted.
A circumferential groove 23 is provided on the surface that comes into elastic contact with the inner flange 10, and the seal ring 22 is pressed against the inner flange 10 so that a part of the seal ring 22 is deformed and protrudes inward into a flange shape.

A retainer ring 24 is further assembled on this seal ring 22, and this retainer ring 24 is brought into contact with the seal ring 22 at the tip of a short cylindrical body 25 having an outer diameter equal to the inner diameter of the thick portion 12. An inner flange 26 is provided around the short cylindrical body 25.
A projecting piece 27 is provided on a part of the outer periphery of the body, and a locking piece 28 is attached to the end of this projecting piece 27 along the circumferential direction of the short cylindrical body 25. By engaging with the notch 13, the retaining ring 24 is assembled into the main body tube 8 of the cylinder tube 7, while pressing the seal ring 22, so as to be unrotatable.

Next, inside the main body tube 8 of the cylinder tube 7,
The piston cylinder 29 is fitted so that it can move forward and backward and cannot be removed.

The piston cylinder 29 has an outer diameter equal to that of the main body cylinder 8.
It has a linear cylindrical shape that is approximately equal to the opening diameter at the inner flange 10 portion and slightly larger than the inner diameter of the seal ring 22, and a valve seat 30 is provided around the inner periphery of the tip in the shape of a flange to form a through hole 31. Locking collar 3 on the outer circumference of the end
2 is circumferentially provided, and an assembly groove 33 is further provided circumferentially on the outer periphery of the distal end portion, and a ventilation groove 32a is carved from the base end surface to the circumferential surface of the locking collar 32.

A second valve piece 34 made of a soft material is inserted into the sleeve cylinder 35 in the through hole 31 which is the opening at the tip of the piston cylinder 29.
It is installed through.

In the embodiments shown in FIGS. 1 and 3, this second valve piece 34 forms a ring-shaped peripheral portion 34b around the periphery of a disc portion 34a having a diameter slightly larger than the opening diameter of the through hole 31.
This configuration is such that they are connected via leg pieces 34c.

The sleeve cylinder 35 has an inner diameter that is approximately equal to the outer diameter of the piston cylinder 29 and an outer diameter that is smaller than the inner diameter of the seal cylinder 11. However, the mounting groove 3 of the piston cylinder 29 is formed on the inner periphery of the wall cylinder 36.
3, and the inner periphery of the wall tube 36 near the bottom plate 38 is thickened to form a stepped portion, and when this sleeve tube 35 is assembled to the tip of the piston tube 29, , the stepped portion 39 abuts against the peripheral edge portion 34b of the valve piece 34 and is designed to be held together with the tip of the piston cylinder 29, and furthermore, a vent hole 40 is bored in the thick portion in the radial direction.

The second valve piece 34 closes the through hole 31 by pinching the peripheral edge 34b, and opens the through hole 31 by deforming the disk portion 34a in a predetermined state.

Further, in the embodiment shown in FIG. 2, the valve piece 34 is directly assembled to the tip of the piston cylinder 29 without using the sleeve cylinder 35.

That is, the valve piece 34 here is the piston cylinder 2
The valve piece part 34e is provided in the shape of an inner flange at the tip of the short cylinder part 34d that engages with the assembly groove 33 at the tip of the piston cylinder 29. On the other hand, the tip of the piston cylinder 29 is not provided with the valve seat 30 and is almost completely closed. A through hole 31 is opened in a ring shape, and the short cylindrical part 3
4d is tightly assembled, the valve piece portion 34e closes the through hole 31, and deforms and opens in a predetermined state.

Next, a cylindrical cylindrical push button 41 is attached to the base end of the piston cylinder 29 .

This push button 41 has a structure in which a peripheral wall 43 is connected to a top plate 42 having a diameter approximately equal to the inner diameter of the main body cylinder 8. A peripheral wall 44 is provided at the base end of the inner periphery of the peripheral wall 43. The peripheral edge of the locking collar 32 is configured to lock, and a portion of the outer periphery of the peripheral wall 43 has a notch 45 in which the vertical strip 14 provided on the inner periphery of the main body tube 8 of the cylinder tube 7 locks. At the other end of the peripheral wall 43, the presser ring 2 is attached.
A locking hole 46 into which the protruding piece 27 of No. 4 can be fitted.
is provided.

A locking piece 28 is provided at the opening at the tip of the locking hole 46.
A bullet piece 47 that comes into contact with is provided. Therefore, as will be described later, when the push button 41 moves forward inside the cylinder tube 7, the locking piece 28 and the bullet piece 47 come into contact with each other.
At least one of the locking pieces 28 is elastically deformed.
The projecting piece 27 including the above-mentioned locking piece 28 enters into the locking hole 46, and when the locking piece 28 and the bullet piece 47 cross over each other, a light impact sound is generated, and a predetermined stroke displacement of the push button 41 can be sensed. .

Also, the main body 8 of the cylinder tube 7 and the piston tube 2
An elastic spring 48 is arranged in the gap formed between the piston 9 and the piston 9 so as to wrap around the outer periphery of the piston cylinder.

One end of this elastic spring 48 is in elastic contact with the inner flange 26 of the retaining ring 24, and the other end is in elastic contact with the locking collar 32 of the piston cylinder 29, so that the piston cylinder 29 is always urged in the proximal backward direction. are doing.

Note that 49 in the figure is a cap that is assembled to the nozzle tube 4.

Now, among the above-mentioned members, the cylinder cylinder 7, which is composed of the storage cylinder 1, the main body cylinder 8, and the assembly cylinder 15, the first valve piece 19, the seal ring 22, and the presser ring 24 are assembled together. The piston cylinder 29, the push button 41, and the second valve piece 34 are attached to this.
are assembled via an elastic spring 48 as a movable part that moves forward and backward.

In this assembled position, the notch 45 of the push button 41 engages with the vertical strip 14 on the inner circumference of the cylinder tube 7, making mutual rotation impossible, and the push button 41 is unable to rotate relative to the piston tube 2.
On the outer periphery of 9 is a seal ring 22 that has been deformed by pressure.
The movable portion, which is in elastic contact with and is urged in the proximal direction by the elastic spring 48, is the sleeve tube 35 assembled to the tip of the piston tube 29, or the second valve piece 34 (see FIG. 2). ) the base end is inner tsuba 1
0 and is prevented from slipping out.

Further, the inside of the piston cylinder 29 is communicated with the outside through a ventilation path formed by a ventilation groove 32a.

1 to 3 show the posture of each embodiment before operation, and the movable parts such as the piston cylinder 29 are moved by the elastic force of the elastic spring 48. , is at the retract limit and cannot be pulled out, and both the first valve piece 19 and the second valve piece 34 are in a closed position, and therefore a pressure chamber 50 is formed within the tip of the main body cylinder 8 at the tip of the piston cylinder 29.

When the push button 41 is pressed from this state, the push button 41 moves forward with the notch 45 guided by the vertical strip 14, and the piston cylinder 29 also moves forward.

During this forward movement, the second valve piece 34 moves toward the piston cylinder 29.
Since the tip opening is closed, the internal pressure of the pressure chamber 50 increases, causing the first valve piece 19 to elastically deform and open, causing the liquid in the storage cylinder 1 to drip out from the nozzle hole 6. In the embodiment shown in FIG. 2, the valve piece 19 is displaced against the elastic force of the elastic spring 21 to open the hole.

Note that when moving forward, the locking piece 2 of the presser ring 24
8 and the bullet piece 47 of the push button 41 cross over each other and are displaced from the state shown in Fig. 5(a) to the state shown in Fig. 5(b).At this time, there is a slight impact, so use this impact as a guide. For example, a constant forward stroke of the pushbutton can be obtained and therefore a constant amount of liquid can be dispensed at all times.

Then, when the pressing force applied to the push button 41 is released,
The movable portion is moved backward by the elastic force of the elastic spring 48.

At this time, the inside of the pressure chamber 50 becomes negative pressure, so the first valve piece 19 closes and the second valve piece 34 opens, and the air flowing into the piston cylinder 29 from the outside through the ventilation groove 32a etc. is the open valve piece 34
It flows into the pressure chamber 50 through the vent hole 40 of the sleeve cylinder 35, and eliminates the negative pressure within the pressure chamber 50.

As is clear from the above description, the drip container of the present invention has a cylinder tube 7 having a first valve piece 19 at the proximal end of the storage tube 1 having a nozzle hole 6 at the tip.
Assemble the piston cylinder 2 into this cylinder cylinder 7.
The movable part consisting of 9 etc. is an elastic spring 4
The piston cylinder 29 has a pressure chamber 50 formed at the tip of the piston cylinder 29.
A vent passage communicating with the outside is provided in a part of the piston cylinder 29, and a second valve piece 34 is attached to the tip of the piston cylinder 29, so that as the piston cylinder 29 moves forward, the internal pressure of the pressure chamber 50 increases and the first The valve piece 19 is opened to drip a fixed amount of liquid from the nozzle hole 6.

Then, when the piston cylinder 29 moves back and returns due to the elastic spring 48, the first valve piece 19 closes and the second valve piece 34 opens.
Air in the piston cylinder 29 communicating with the outside is supplied through the ventilation hole 44 of the sleeve cylinder 38 or directly (second
(Figure) Since the liquid flows into the pressure chamber 50 and the negative pressure within the pressure chamber 50 is eliminated, the next operation ensures that the liquid drips out again.

Therefore, according to the drip container of the present invention, it is possible to reliably dispense a fixed amount of the extremely high viscosity liquid stored therein, making it extremely easy to operate and preventing leaks or drips due to incorrect operation. Moreover, the present invention has many excellent effects such as the tip nozzle hole is not clogged with liquid, the structure is simple, and molding is easy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing another embodiment.
FIG. 3 is a longitudinal sectional view showing still another embodiment. FIG. 4 is an exploded perspective view of the main parts. FIG. 5 is an explanatory diagram showing the positional relationship between the locking hole of the push button and the locking piece of the presser ring. Explanation of symbols, 1... Storage tube, 7... Cylinder tube, 8... Main body tube, 11... Seal tube, 15...
Assembly cylinder, 17... Suction hole, 19... First valve piece,
21... Resilient spring, 22... Seal ring, 24... Holding ring, 28... Locking piece, 29
... Piston cylinder, 31 ... Through hole, 32a ... Ventilation groove, 34 ... Second valve piece, 35 ... Sleeve cylinder,
41...push button, 47...bullet piece, 48...spring, 50...pressure chamber.

Claims (1)

[Scope of utility model registration request] A storage cylinder with a nozzle hole at the tip, a cylinder cylinder fitted into the base end of the storage cylinder, a push button at the base end, and a part with a ventilation passage communicating with the outside,
a piston cylinder whose outer periphery is in close contact with a part of the inner periphery of the cylinder cylinder and which moves forward and backward without being able to escape from inside the cylinder cylinder; an elastic spring disposed between the piston cylinder and the cylinder cylinder; a first valve piece assembled to the tip opening of the cylinder cylinder, which opens when the piston cylinder moves forward and closes when it retreats;
and a second valve piece that closes when the piston moves forward and opens when it retreats.