JPH0260587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a delivery device for soft or pasty substances or concentrated liquids such as cosmetic creams, nutrients, toothpaste, mustard, mayonnaise, etc.

Known delivery devices for this type of application include:
It consists of a metal container, in which a plunger is movably mounted, a delivery valve is attached to one end, and another valve or plug is attached to the other end, through which the propellant (liquefied gas, etc.) is injected. A plunger applies pressure to the material to be filled and delivered when the delivery valve is opened. Some also used a flexible pack instead of a plunger.

In metal containers of this type, even with moderate wall thicknesses, the remaining propellant (ie, the propellant remaining after the delivery of the contents has been completed) will not explode. For this reason, although this type of metal container is expensive and heavy, there has been no conventional container made of plastic because there is a risk of explosion in a plastic container.

The present invention provides a delivery device which releases the pressure after the completion of delivery of the contained material, thereby eliminating the danger that may occur when pressure is present inside the device.

It consists of a body whose inside is cylindrical, a plunger that is slidable in contact with the inner surface of the body, and a delivery valve provided at one end of the body, and the plunger is elastically deformed to cause the body to close. The plunger is made of a flexible material that can form a gap with the inner surface of the plunger, and the plunger is provided with a fitting mechanism, and when the content to be sent out is completed, the pressure of the propellant causes the fitting mechanism to close. The corresponding mechanism that fits the
The delivery valve is formed as a tiltable or tiltable delivery valve, and when the valve is tilted, the plunger fitted therewith forms a gap between the barrel and the plunger due to elastic deformation, and the propellant is The discharge valve enters a chamber formed between the plunger and the delivery valve through a gap between the body and the plunger, and can be discharged to the atmosphere through the valve.

Tilting or tilting valves (also referred to as flexible valves) are well known and consist of a shaft-shaped member with an axial blind hole communicating at one end with a radially formed aperture. The shaft member has a head portion at one end and a flange at a location remote from the head portion.

The shaft member is mounted at a location between the flange and the head within a bore formed in the elastically deformable member in close contact with the flange and the head. When the shaft member is laterally bent or tilted, the radially defined aperture communicates with the internal containment or containment chamber.
When the force applied to the shaft-like member is removed, the shaft-like member returns to its resting or non-moving position due to the elastic deformation member and/or the elastic restoring force of the shaft-like member, so that the communication state is interrupted.

In one embodiment of the invention, the head portion formed on the shaft-like member constitutes a corresponding mechanism forming part of the valve, and the engagement mechanism is a seat portion formed on the plunger, which receives the contents to be delivered. When it is exhausted, the head section has a part that moves in due to the upward force of the propellant.

The subject matter of the invention will become more apparent from the following detailed description, with reference to preferred embodiments illustrated in the accompanying drawings. Note that the embodiments shown in the accompanying drawings are merely illustrative and are not limited thereto.

In the accompanying drawings, reference numeral 1 designates a cylindrical body made of plastic or other material, or possibly metal. One end of this cylindrical body is closed by an integrally formed bottom, the other end is open, and an annular extension 2 is formed around the cylindrical body. The cylindrical body 1 is covered with a cover or cap 4 at its other end. The cover or cap connects the collar end 5 to the annular extension 2.
It is attached by a snap connection to the other end by fitting under the other end.

In the central part of the cover or cap 4 a tiltable or flexible delivery valve V is mounted. The valve has a generally cylindrical shaft member made of metal or plastic with an axial blind bore and a series of apertures 7 radially drilled at one end. A disk-shaped head portion 11 is formed on this shaft-like member, and an annular flange 12 having one side having a conical shape is formed at a remote location. The valve also has a deformable elastic member 8 made of rubber or elastomer, and a tube or sleeve 8A is formed in the center of the elastic member. A shaft member 6 is placed within this sleeve, the ends 8B and 8C of the shaft member being in resilient contact with each of the flange 12 and the head portion 11 in a rest or non-moving state to provide a sealed condition. .
The shaft-shaped member 8 has a disc-shaped portion 8D extending into the inner surface of the cover or cap 4, thereby providing a seal between the cover or cap 4 and the cylindrical body 1. The shaft member 8 is held by the cover or cap 4 while passing through an annular rim 4a formed at the center of the cover or cap 4. This annular rim extends into an annular seat 8E formed in the tube or sleeve 8A.

The shaft member 6 is covered with a hollow member 9 made of a flexible material such as plastic. A slit 10 is formed in the extremely thin spherical end of this hollow member. In the resting or non-moving state, this slit is in an open state with both ends of the slit in close contact with each other (see Figures 1 and 3), but when feeding out the contents, the slit is in the open state (see Figures 1 and 3).
(Fig.), both ends of the slit are separated from each other by the thrust exerted by the stored object.

A plunger 3 made of a flexible synthetic material is slidably mounted within the cylindrical body 1 and has sharp or outwardly projecting ends 3B and 3C in cross section. It has a circumferential skirt 3A provided with. The plunger is formed with a lateral central portion (central disc-shaped portion) 3D, and a seat portion, ie, a cylindrical blind hole 3E, is provided in this lateral central portion. The diameter of this seat part, that is, the blind hole, is approximately equal to the diameter of the head part 11, and since the flare part 3F is provided above the seat part 3E, when the stored material to be sent out is used up, the Head 11 due to the pushing force of the material
It is becoming easier to fall into this blind hole.

As shown in FIG. 3, after opening the cylindrical body 1 and injecting a certain amount of slightly cooled liquid propellant, the cylindrical body is immediately closed with a cover or cap 4 fitted with a valve. At this time, the plunger 3 is temporarily connected to the valve (temporary connection is not possible because there is some contraction or expansion between the head portion 11 of the shaft-like member 6 and the seat portion 3E of the plunger). be). Thereafter, the hollow member or sheath member 9 is removed and the contents are press-fitted into the delivery device through the shaft member 6. This injection pressure causes the tube or sleeve 8A to elastically deform so that the radially formed aperture 7 communicates with the interior of the cylindrical body. Of course, the injection pressure is greater than the pressure of the propellant, so that the contents enter the cylindrical body and push down the plunger 3 until it reaches the bottom of the cylindrical body 1. The propellant material is thus accommodated in a compressed state in the chamber or gap formed between the bottom and the plunger 3. The gap is thus formed because the central portion 3D of the plunger is separated from the lower end of the sealing skirt 3A.

When using the device of the invention, the hollow member or sheath member 9 is pushed laterally to tilt the shaft member 6 (see FIG. 2). Then, the head portion 11 moves away from the inner end 8C of the elastic sealing member 8 to some extent (indicated by the symbol A), so that the aperture 7 formed in the radial direction
It will communicate with the contained object. Then, since the plunger 3 is pressed by the propellant, the stored object is sent out to the outside by expanding the slit 10.

When the contents are used up, the seat part 3E comes into contact with the head part 11, so when a force is applied to the hollow member or sheath member 9 and it is tilted together with the shaft member 6, the plunger 3 is moved to the side of the sealing skirt 3A. Due to the radial deformation due to the elastic deformation characteristics, the propellant material under the lower surface of the plunger enters the chamber formed between the plunger 3, the valve V and the cylindrical body 1, and deforms the valve V and the hollow member. That is, it is discharged from the sheath member 9 into the atmosphere. As a result, the pressure inside the container becomes atmospheric pressure.

It goes without saying that the cylindrical body 1 may be made of metal, which improves safety even under low pressure. Alternatively, the cover or cap 4 may be made of metal and screwed onto the cylindrical body 1.

[Brief explanation of the drawing]

1 is an axial cross-sectional view of the device according to the invention, actually filled and at rest or in a non-moving state; FIG. 2 shows the device according to the invention with a delivery valve installed; FIG. FIG. 3 is an enlarged cross-section of the end of the device, with the valve in a bent or tilted position and in the delivery condition; FIG. DESCRIPTION OF SYMBOLS 1...Body part, 3...Plunger, 3A...Sealing skirt, 3B, 3C...Tip part, 3D...Central disc-shaped part, 3E...Seat part, 4...Cover (cap), 6... Shaft-shaped member, 7... Opening hole, 8...
...Elastic sealing member, 11... Head portion, V... Delivery valve.

Claims (1)

[Claims] 1. Consists of a body whose inside is cylindrical, a plunger that can slide within the body in contact with the inner surface, and a delivery valve provided at one end of the body. The plunger is made of a flexible material that can form a gap with the inner surface of the body by elastic deformation, and the plunger is provided with a fitting mechanism, and when the plunger completes delivery to the stored object, the propellant material is A corresponding mechanism that mates with the fitting mechanism due to the pressure of
The delivery valve is formed as a tiltable or tiltable delivery valve, and when the valve is tilted, the plunger fitted therewith forms a gap between the barrel and the plunger due to elastic deformation, and the propellant is Dispensing device for paste-like substances, cream-like substances or thick liquids, characterized in that the chamber formed between the plunger and the dispensing valve enters through this gap and is discharged through the valve into the atmosphere. 2. The delivery device according to claim 1, wherein the plunger is formed with a sealing skirt having an elastic tip. 3. The delivery device of claim 2, wherein the plunger has a central disc-shaped portion around which the sealing skirt is joined. 4. The fitting mechanism of the plunger comprises a seat part into which a head part formed on the shaft-like member of the valve can be fitted, and the head part is the fitting corresponding mechanism. The feeding device according to item 1. 5. The feeding device according to claim 1, wherein the shaft-like member is a hollow body having an opening in a side portion and supported by an elastic sealing member. 6. The elastic sealing member is retained by a cover or cap that can be coupled to the body to provide a seal or gasket between the body and the cover or cap. The feeding device according to item 5. 7. The feeding device according to claim 6, characterized in that a bottom wall is integrally formed on the body.