JPH09168550A - Extruder for fluid composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extruder for a fluid composition to prevent contamination of the extruder by use and to be used repeatedly, by detachably fitting an outer nozzle with a thin hollow pipe shaped applicator mounted on the tip part of a circular cone shaped nozzle by inserting with a small gap. SOLUTION: This extruder for a fluid composition has a vessel 10 to house a fluid composition, a circular cone nozzle 11 with a delivery port 14 formed on the tip of the vessel, and a plunger 12 to push the component into the vessel 10. A packing 13 is attached to the tip part of the plunger 12. An outer nozzle 15 is detachably attached on the circular cone nozzle 11, and a thin hollow pipe shaped applicator 16 is mounted thereon. The outer nozzle 15 is fit on the circular cone nozzle 11 with a small gap, and the composition is prevented from flowing into the gap. Since this extruder can be used held in a hand, a finger hanging parts 17 and 18 are disposed on the vessel 10 and the plunger 12 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruding device for a composition having fluidity, and particularly to an extruding apparatus suitable for medical material having fluidity for dental use. Further, according to the present invention, it is possible to provide an extrusion apparatus which is excellent in sanitary retention and which can prevent repeated contamination and can be used repeatedly.

[0002]

2. Description of the Related Art For example, in the field of dentistry, for filling a cavity of a tooth with a dental chemical or a dental polymerizable composition having fluidity in the oral cavity (hereinafter referred to as a dental material), it is currently exclusive. Using a filling device or brush, the tip is thin and direct,
A method of transferring dental material to a nozzle (hereinafter referred to as a syringe tube) that is set so as to be able to fill the cavity of the tooth and filling it with a dedicated container (for example, CR syringe: manufactured by Centrix), and putting the dental material in advance. The filling method using the supplied syringe tube (PLT: preloaded tip) is an apparatus and method generally used for filling a dental material. Of the above methods, when filling a relatively low-viscosity dental material, the method of transferring the dental material to a syringe tube as shown in FIG. 1 and filling the cavity with a dedicated container (eg CR syringe) is often used. ing.

[0003]

[Problems to be Solved] In the case of a filling operation using a filling device, a brush or the like or a filling operation using a syringe tube, bubbles or voids may occur in the process of the operation procedure, which induces deterioration of the physical properties of the material after the treatment. May cause. Also, in the case of filling with a syringe tube,
One syringe tube is used only for one patient because the blood or saliva of the patient adheres during operation and the syringe tube is contaminated, and the syringe tube needs to be updated every time the patient changes. Therefore, the amount of the unused composition remaining in the syringe tube is inevitably large, which is uneconomical. The above-mentioned problems can be avoided by adopting a method of directly extruding a required amount of the fluid composition from a storage container that accommodates a large amount of the composition.

However, when the extrusion device is used for dentistry and medical purposes, repeated use of the same device causes a problem of contamination of the device with blood, saliva and the like. Therefore, when used for dentistry and medical purposes, it is necessary to take measures to prevent contamination of the extruder.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a device for pushing a fluid composition with a plunger from a discharge hole provided at the tip of a conical nozzle, and fitting the conical nozzle with a small gap. This is an extrusion device in which an outer nozzle that is fitted and has a thin hollow pipe-shaped applicator at its tip is detachably attached to the outside of the conical nozzle. Further, the present invention is, in the above-mentioned extrusion device, provided with a pressing plate-like body at the exposed end of the plunger, providing at least two finger hooks on the body of the device, and hanging the finger on the plate-like body and the finger hook. It is an extrusion device adapted to be used.

Further, the present invention comprises any one of the above-mentioned extrusion devices and a flexible plastic cover for accommodating the extrusion device, and the flexible plastic cover can be substantially sealed after accommodating the extrusion device. The plastic cover has a sealing mechanism or a folding part, and the plastic cover has a mechanism capable of exposing the applicator tip of the extrusion device at one end thereof. It is an extrusion device designed to prevent contamination.

The device of the present invention will be described below with reference to the drawings. FIG. 1 is a plan sectional view showing an example of a conventional dental fluid composition supply device. Cylinder 1 and Plunger 2
And a syringe tube 4 attached to the tip portion 3 of the cylinder 1. The syringe tube contains a fluid composition therein, and has a piston 5 that can be pushed in at one end and a thin discharge port 6 at the other end. At the time of use, the tip of the plunger pushes the head of the piston 5 of the syringe tube, and the composition is discharged through the discharge port 6.
It is ejected from and is given to the treatment part of the patient. Although the syringe tube is discarded after one use, the amount of the composition remaining in the syringe tube is large. The cylinder 1 and the plunger 2 may be provided with finger hooks 7 and 8, or a spring or the like may be attached to the finger hooks to reduce the force when the composition is extruded.

FIG. 2 is a plan sectional view showing an example of the apparatus according to the present invention. A container 10 for containing a fluid composition, a conical nozzle 11 provided at the tip of the container, and a plunger pushed into the container. Have twelve. Further, a packing 13 is attached to the tip of the plunger 12 in order to provide airtightness between the plunger 12 and the container 10.
The extrusion apparatus of the present invention can accommodate a flowable composition such as a dental composition or various household or industrial adhesives. Among these compositions, the dental composition can be handled particularly preferably by the device of the present invention, and the dental composition will be described below as an example. A discharge port 14 is provided at the tip of the conical nozzle, and an appropriate amount of the composition can be pushed out and used by pushing the plunger into the container. Applying the composition to a patient from a conical nozzle to apply the dental composition to the patient may cause the patient's blood or saliva to adhere to the device, so it is not possible to use the same device for other patients. Not good for hygiene.

In the present invention, the outer nozzle 15 is detachably mounted on the conical nozzle 11. For mounting the conical nozzle and the outer nozzle, any detachable structure such as screwing or friction joining or pressure joining utilizing the flexibility and elasticity of the material is used. A thin hollow pipe applicator 16 is provided at the tip of the outer nozzle, and the composition is discharged from the applicator of the outer nozzle via a conical nozzle. The size and shape of the applicator should be variously changed depending on the use of the device, and for dental use, the length is 2 mm to 9 mm and the cross-sectional area is about 0.1 to ² mm ² . The outer nozzle fits into the conical nozzle with a small gap to prevent the composition from flowing into the gap. The inflow of the composition causes the composition to be wasted and undesirably pollutes the device. Applicator 16 bottom 1
6'and the tip of the conical nozzle discharge port 14 are configured to be in close contact with each other to prevent the composition from flowing into the gap.

In the device of the present invention, the outer nozzle 15 is replaced after each use. By replacing the outer nozzle, the contamination of the tip of the device is removed and the residue of the composition remains in the thin applicator, so that the waste of the composition is minimized. Since this device is used by holding it in the hand, it is possible to provide finger hooks 17 and 18 on the container and the plunger, or to provide a spring to the finger hooks and take measures to reduce the force for pushing out the composition. preferable. The finger-holding portion 17 provided on the body portion (container) of the apparatus may be fixed to the body portion, or a rotatable member may be added to the body portion and provided on the member. The rotatable finger rest is
Make the device even easier to use.

The plastic cover used in the present invention is intended to house and cover the entire extrusion device and to keep the entire device sanitary. The plastic cover itself is preferably flexible, transparent and inexpensive, and many ordinary molded plastic films can be used.
The extrusion device is used by hand from above the plastic cover. This plastic cover is renewed after each use. FIG. 4 is a plan view showing an example of the plastic cover. The plastic cover 19 has a sealing mechanism or a foldable portion capable of sealing, and the cover of FIG. 4 has a seal chuck 20 as a sealing mechanism. One end of the plastic cover has a small diameter 21 to facilitate introduction of the conical nozzle or the container 10. The tip of the small diameter 21 may be provided with a hole 22 exposing the tip of the applicator in advance, or the small diameter tip may be broken and opened by the applicator 16 at the time of mounting.

FIG. 4 is a plan view showing a state where the plastic cover is attached to the extrusion device. The hole 22 of the plastic cover 19 almost exposes the outer nozzle 15, but does not completely expose it. In other words, the size of the hole is such that the tip of the outer nozzle is exposed, but the base, that is, the portion that fits with the conical nozzle is covered. The small-diameter portion 21 of the cover is formed so that the finger-holding portions 17 can be accommodated at an appropriate interval to facilitate the accommodation of the extrusion device. The sealing of the cover does not have to be strict, and it may be performed by using a seal chuck as shown in FIG. 4 and folding the cover to an appropriate length so that the pushing device is not exposed from the cover.

An outer nozzle of the system according to the invention,
In consideration of infection with viruses, bacteria, etc., the cover is made of resin and is disposable, or sterilized by dry heat sterilization, high pressure steam sterilization, or the like. Typical materials are PET, PBT, nylon,
Polycarbonate, polystyrene, polyethylene, 1,
Examples thereof include 2-polybutadiene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetal, polyvinyl alcohol, cellulose acetate, celluloid, ABS, polyphenylene ether, and polysulfone.

[0014]

In the extrusion device of the present invention, the outer nozzle provided with the applicator on the thin hollow pipe is fitted to the tip of the container, so that the required amount of the composition in the container can be taken out without waste and the remaining amount. Since it can be minimized, higher economy can be realized compared to the conventional syringe tube. Further, it is possible to eliminate an operation procedure such as a filling operation with a filling device, a brush or the like, or a filling operation with a syringe tube, thereby providing an efficient filling operation. Further, by using the extrusion apparatus of the present invention, as compared with the conventional method, the operation steps and the operation time are shortened, troubles such as the embedding of bubbles are eliminated, and the fluid composition is reliably supplied in a short time. To enable that.

When this device is used for medical purposes, the operating time can be shortened to reduce the burden on the operator and shorten the treatment time. Further, when used for medical and dental purposes, a simple and hygienic extrusion device is provided by using a removable outer nozzle and a cover that covers the supply container for the purpose of preventing contamination by viruses, bacteria and the like. .

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an example of a conventional extrusion device.

FIG. 2 is a plan sectional view showing an example of an extrusion device according to the present invention.

FIG. 3 is a plan view showing an example of a plastic cover according to the present invention.

FIG. 4 is a plan view showing a state in which the extrusion device according to the present invention is housed in a plastic cover.

[Explanation of symbols]

 1 Cylinder 2 Plunger 3 Tip Part 4 Syringe Tube 5 Piston 6 Discharge Port 7, 8 Finger Hooking Part 10 Container 11 Cone Nozzle 12 Plunger 13 Packing 14 Discharge Port 15 Outer Nozzle 16 Applicator 16 'Applicator Bottom 17, 18 Finger Hooking Part 19 Plastic cover 20 Seal chuck 21 Small diameter part 22 Hole

Claims (3)

[Claims] 1. A device for ejecting a fluid composition contained in a container from a discharge hole provided at the tip of a conical nozzle with a plunger, which is fitted into the conical nozzle with a small gap and An apparatus for extruding a fluid composition in which an outer nozzle having a thin hollow pipe-shaped applicator at its tip is detachably attached to the outside of the conical nozzle. 2. The extrusion device according to claim 1, wherein a pressing plate member is provided at an exposed end portion of the plunger,
An extrusion device in which at least two finger-hooking portions are provided on the body of the apparatus, and the plate-like body and the finger-hooking portions are finger-hooked for use. 3. The extrusion device according to claim 1 or 2, and a flexible plastic cover for housing the extrusion device, the flexible plastic cover being capable of sealing after housing the extrusion device. A sealing mechanism or a foldable portion, and the plastic cover has a mechanism capable of exposing the applicator tip of the extrusion device at one end thereof, and the applicator and the plastic cover are renewed to provide the extrusion device. Extrusion device designed to prevent the contamination of.