JP2010022422A - Syringe-shaped container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a syringe-shaped container for storing a viscous paste, capable of preventing air mixed when the paste is stored from being mixed in the paste to be discharged when the container is used. <P>SOLUTION: The syringe-shaped container is composed of a cylindrical cylinder which has an tapered discharge part at one end and an opening with a finger hook part on the outer surface at the other end and in which the paste is stored; a plunger 2 having a head part 2a in such a shape as approximately adapted to the discharge part of the cylinder, and an O-ring attached groove 2b, a rod part 2c and a presser part 2d disposed in the order following the head part 2a for extruding the paste inside the cylinder toward the discharge part 1a side; and an O-ring attached to the O-ring attached groove 2b of the plunger 2. In the syringe-shaped container, a channel through which air permeates but the paste does not permeate from the head part 2a to the rod part 2c side is formed in the O-ring attached groove 2b of the plunger, and preferably, a plurality of grooves or projecting lines 2e are formed between the plunger 2 and the O-ring 3 parallel to the axis of the plunger 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a syringe-type container for storing a viscous paste, and more specifically, a paste-like dental material such as a viscous composite resin or an adhesive is stored and the paste is stored. The present invention relates to a syringe-type container in which air mixed at the time is rarely mixed into a paste during use and discharged.

  2. Description of the Related Art Conventionally, a syringe-type container is often used as a container for storing a viscous paste-like dental material such as a composite resin or an adhesive and extruding an appropriate amount at the time of use.

  That is, this syringe-type container has a cylindrical cylinder that has an opening having a tapered discharge part at one end and a finger hook part on the outer surface at the other end, in which paste is stored, and a discharge part of the cylinder A head portion having a shape substantially conforming to the head portion, an O-ring mounting groove, a rod portion, and a pressing portion are sequentially provided following the head portion, a plunger for pushing the paste in the cylinder toward the discharge portion side, and an O-ring Although it has a structure consisting of an O-ring mounted in the mounting groove, in order to store the viscous paste in this cylinder, the plunger head was pushed into the tapered discharge section of the cylinder. It is preferable to carry out by injecting the paste into the cylinder by inserting a needle-like part attached to the tip of a syringe-like injector in the discharge part of the cylinder in a state It has been.

  However, in the method of storing the paste by pressing and injecting the viscous paste into the cylinder in this way, at the initial stage of press injection, the tip of the plunger head portion that is substantially fitted to the tapered discharge portion of the cylinder is small. Since the plunger must be moved to the opening side of the cylinder by the pressure injection input that acts on the area, it is not possible to easily inject the paste into the cylinder. Paste injection is started with the plunger moving to a certain extent from the tapered discharge part of the cylinder to the opening side of the cylinder instead of being in contact with the cylinder. Air is present in the tapered discharge part of the cylinder before injection.As a result, it was impossible to press-paste the paste with no air remaining in the cylinder.

  In this way, when paste is pressed and injected from the discharge part of the cylinder in the presence of a certain amount of air, the air continues to the head part of the plunger by the paste injected from the discharge part of the cylinder. The movement is prevented and compressed by the O-ring that moves to the head portion side of the ring mounting groove and contacts the inner surface of the cylinder. Therefore, if the needle-like part attached to the tip of the syringe-like injector is extracted from the cylinder discharge part after the predetermined amount of paste has been pressed and injected, the compressed air pressure causes the paste to overflow from the cylinder discharge part. In addition to the disadvantage that a predetermined amount of paste cannot be stored in the cylinder, when the paste in the cylinder is pushed out from the discharge part and used, air is mixed in as bubbles in the paste. In the case of a dental composite resin, the strength of the cured composite resin is reduced, and in the case where the paste is a dental adhesive, an undesired phenomenon occurs in which a portion having a significantly low adhesive strength is generated. There was a drawback.

  Therefore, as a syringe-type container that can remove the air stored together with the paste in the cylinder in this way, it consists of a cylindrical cylinder and a plunger that is pushed into the cylinder, and the paste is introduced into the cylinder and the paste in the cylinder The cylinder has a tapered discharge part at one end and an opening for introducing the plunger at the other end, and the plunger has a shape substantially matching the tapered part of the cylinder. A portion comprising a plunger head and a plunger rod for pushing the plunger head into the cylinder, and provided with linear protrusions and / or grooves on the inner surface of the cylinder and sliding with the inner surface of the cylinder of the plunger head An elastic seal is provided on the inner surface of the cylinder. It is configured to move with a small gap on the strip or groove, or the plunger head of the container is elastic, and the plunger head slides against the inner wall of the cylinder In this way, the plunger head is configured to move on the protrusions or grooves provided on the inner surface of the cylinder while having a minute gap, thereby preventing air bubbles from entering and preventing the contents from leaking. There is a syringe type container (refer to patent documents 1).

  However, such a syringe-type container is difficult to process because it has to be provided with linear protrusions and / or grooves on the inner surface of a small-diameter cylinder. As a result, the syringe-type container is expensive. was there.

JP 2000-344282 A

  The present invention eliminates the drawbacks of the prior art, easily removes the air mixed in the cylinder when storing the viscous paste, and is less likely to be discharged and mixed into the paste during use. Another object is to provide a syringe-type container that can be manufactured at low cost.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have not provided a linear protrusion and / or groove on the inner surface of a small diameter cylinder as in the prior art, but rather an O-ring of the plunger. It is only necessary to provide a groove or ridge that forms a passage between the O-ring and a groove that allows air to pass from the head side to the rod side but not the paste in the mounting groove. Since it is provided in advance in the O-ring mounting groove on the outer surface of the plunger, a slightly protruding protrusion is provided on the O-ring mounting groove forming portion of the mold composed of a split mold for plunger injection molding, and the plunger O A shallow groove is formed in the ring mounting groove, or a groove is formed in the O-ring mounting groove forming part of the mold composed of a split mold for plunger injection molding, and a plunger is provided. Slightly protruded in the O-ring mounting groove The target syringe can be easily and inexpensively formed by forming a groove or forming a shallow groove in the O-ring mounting groove of the plunger after injection molding by machining or electric discharge machining. The present invention was completed by investigating that a mold container can be manufactured.

That is, the present invention is substantially compatible with a cylindrical cylinder having an opening with a tapered discharge portion at one end and a finger hook portion on the outer surface at the other end, in which paste is stored, and the discharge portion of the cylinder. A head portion having a shape to be formed, an O-ring mounting groove, a rod portion, and a pressing portion are sequentially provided following the head portion, and a plunger for pushing the paste in the cylinder toward the discharge portion, A syringe-type container comprising an O-ring mounted in an O-ring mounting groove, and a passage through which air passes from the head side to the rod side but does not pass paste through the O-ring mounting groove of the plunger. A syringe-type container is provided with a groove or a protruding line portion formed between the two.
In the syringe-type container according to the present invention, the groove is formed by shallowly drilling the O-ring mounting groove of the plunger from the head portion side to the rod portion side, or the protruding portion is the O-ring of the plunger. A mode in which a single protrusion is formed in the ring mounting groove slightly from the head side to the rod part side, or the ridge is adjacent to the O ring mounting groove of the plunger from the head part side to the rod part side. There is a mode in which there are two ridges formed so as to protrude slightly, and it is preferable that a plurality of such grooves or ridges are provided in parallel with the axial direction of the plunger. .

  The syringe-type container according to the present invention has a flow path through which air is passed from the head portion side to the rod portion side but paste is not passed through the O-ring mounting groove on the outer surface of the plunger of a syringe-type container that has been conventionally used. It can be manufactured easily and inexpensively by simply providing a groove or ridge formed between the two and the air mixed in the cylinder when storing the paste, and air is mixed into the paste during use and discharged. It is a syringe-type container that is rare to do.

Below, the Example of the syringe type container which concerns on this invention is described in detail.
FIG. 1 is a plan view showing only a cylinder of an embodiment of a syringe-type container according to the present invention in cross section, and FIG. 2 is an embodiment of an O-ring mounting groove provided with a plunger groove before mounting an O-ring. FIG. 3 is an enlarged perspective view schematically showing only the portion, and FIG. 3 shows another embodiment of the O-ring mounting groove provided with one convex portion of the plunger before mounting the O-ring. FIG. 4 is an enlarged perspective view schematically showing only the portion, and FIG. 4 shows only another portion of another embodiment of the O-ring mounting groove provided with the two ridges of the plunger before mounting the O-ring. FIG. 5 is an enlarged perspective view schematically showing, FIG. 5 is an enlarged cross-sectional view taken along line AA of FIG. 1 in a portion where the groove of FIG. 2 is provided, and FIG. 6 is a view in a portion where the protruding strip portion of FIG. 1 is an enlarged cross-sectional view taken along line AA in FIG. 1, and FIG. 7 is an enlarged view taken along line AA in FIG. It is a cross-sectional view.

In the drawings, reference numeral 1 denotes a cylindrical cylinder having a tapered discharge portion 1a at one end and an opening portion 1b having a finger hook portion 1c on the other end at the other end, in which paste is stored.
Reference numeral 2 denotes a head portion 2a having a shape substantially adapted to the discharge portion 1a of the cylinder 1, and an O-ring mounting groove 2b, a rod portion 2c, and a pressing portion 2d provided in this order, and a paste in the cylinder 1 Is a plunger for extruding to the discharge part 1a side, and a groove or ridge part 2e extending from the head part 2a side to the rod part 2c side is provided in the O-ring mounting groove 2b of the plunger 2. As this groove or protruding portion 2e, as shown in FIG. 2 and FIG. 5, a mode in which the O-ring mounting groove 2b of the plunger 2 is shallowly formed or as shown in FIG. 3 and FIG. A mode in which one protrusion is formed by slightly projecting in the O-ring mounting groove 2b of the plunger 2, or a slight amount in the O-ring mounting groove 2b of the plunger 2 as shown in FIGS. There is an aspect in which two ridges are formed so as to project. Further, although not shown, a “texture” state in which the direction of the groove is random may be used.
3 is an O-ring mounted in the O-ring mounting groove 2b of the plunger 2, and when this O-ring 3 is mounted in the O-ring mounting groove 2b of the plunger 2, the O-ring mounting groove 2b of the plunger 2 A channel that allows air to pass from the head portion 2a side to the rod portion 2c side but not the paste is formed between the O-ring 3 and the groove or convex portion 2e.

  That is, the groove 2e is formed by shallowly drilling the O-ring mounting groove 2b of the plunger 2 from the head portion 2a side to the rod portion 2c side. The groove 2e forms a flow path that allows air to pass but does not allow paste to pass through the portion where the O-ring 3 attached to 2b does not enter the groove 2e, and the protrusion 2e is attached to the O-ring of the plunger 2. In the embodiment as shown in FIG. 3 formed in the groove 2b so as to protrude slightly from the head portion 2a side to the rod portion 2c side, the O-ring 3 attached to the O-ring attachment groove 2b as shown in FIG. The gap formed on both sides of the ridge 2e at the part deformed by the ridge 2e forms a flow path that allows air to pass but not paste, and the ridge 2e is attached to the plunger 2 O-ring. It is formed in the groove 2b so as to protrude slightly from the head portion 2a side adjacent to the rod portion 2c side. In the embodiment as shown in FIG. 4, which is the two protruding ridges 2e, a gap where the O-ring 3 between the two protruding ridges 2e does not enter, as shown in FIG. It forms.

The syringe-type container according to the present invention includes the cylindrical cylinder 1 described above, a plunger 2, and an O-ring 3 mounted in an O-ring mounting groove 2b of the plunger 2.
In the syringe-type container according to the present invention comprising the cylinder 1, the plunger 2, and the O-ring 3, first, the plunger 2 having the O-ring 3 mounted in the O-ring mounting groove 2b is inserted into the cylinder 1 from the head portion 2a side. It is inserted into the opening 1b and positioned so that the head 2a of the plunger 2 fits into the tapered discharge part 1a of the cylinder 1.

In this state, the needle 1 attached to the tip of the syringe-like injector is inserted into the discharge part 1a of the cylinder 1 with the discharge part 1a of the cylinder 1 standing vertically so that it is positioned at the top. After moving the plunger 2 to some extent from the tapered discharge part 1a of the cylinder 1 to the opening side of the cylinder 2, the viscous paste contained in this injector is put into the cylinder 1 When the pressure is injected from the needle-like portion, the plunger 2 is gradually moved toward the opening 1b of the cylinder 1 by the pressure of the paste to be injected, and the paste is stored in the cylinder 1.
At this time, the paste presses the air previously present in the cylinder 1 from the discharge part 1a side of the cylinder 1 against the head part 2a and the O-ring 3 of the O-ring mounting groove 2b following the head part 2a of the plunger 2. As a result, the air is compressed in the head portion 2a of the O-ring mounting groove 2b and the O-ring 3 following the head portion 2a of the plunger 2 in the cylinder 1.

  With the air remaining in the cylinder 1 as described above, when the needle-like part attached to the tip of the syringe-like injector after the press-injection of a predetermined amount of the paste is extracted from the discharge part 1a of the cylinder 1, it is compressed. A phenomenon occurs in which the paste overflows from the discharge part 1a of the cylinder 1 due to the air pressure and a predetermined amount of paste cannot be stored in the cylinder 1, and the paste in the cylinder 1 is pushed out from the discharge part 1a. When using, since the remaining air is mixed into the paste as air bubbles, for example, when the paste is a dental composite resin, the strength of the cured composite resin is reduced, and the paste becomes dental. In the case of the adhesive for use, an undesired phenomenon that a portion having an extremely low adhesive strength occurs occurs.

  Therefore, in the present invention, the O-ring mounting groove 2b of the plunger 2 is provided with a groove or ridge portion 2e extending from the head portion 2a side to the rod portion 2c side. When such a groove or ridge portion 2e is provided in the O-ring mounting groove 2b of the plunger 2, the head portion 2a and the O-ring 3 of the O-ring mounting groove 2b following the head portion 2a of the plunger 2 are provided. The air remaining so as to be pressed is from the head portion 2a side formed between the O ring 3 and the rod portion 2c to the rod portion 2c side by the groove provided in the O ring mounting groove 2b or the protruding strip portion 2e. Since it is discharged to the rod portion 2c side through the flow path that passes the paste but does not allow the paste to pass, almost no air remains in the cylinder 1 when the paste is pressed and injected. The occurrence of this can be greatly reduced. In this way, the air remaining so as to be pressed against the head portion 2a side of the O-ring mounting groove 2b following the head portion 2a of the plunger 2 is placed between the O-ring mounting groove 2b and the O-ring 3 between the head portion 2a. In order to discharge efficiently to the rod part 2c through a flow path that allows air to pass from the side to the rod part 2c side but not paste, a plurality of grooves or ridges 2e are provided in parallel with the axial direction of the plunger 2 The book is preferably provided.

  The shape, width, depth, and height of the groove or protrusion 2e extending from the head 2a side to the rod 2c side in the O-ring mounting groove 2b of the plunger 2 are the types of paste stored in the cylinder 1. In particular, although it is determined by the viscosity, it may be set as appropriate so that air can pass but paste cannot pass.

  Therefore, in order to use such a syringe-type container according to the present invention, almost all of the inside of the cylinder 1 is in a paste and almost no air remains. It can be used by pushing the pressing part 2d of the plunger 2 toward the tapered discharge part 1a side of the cylinder 1 with the thumb and pushing the paste stored in the cylinder 1 by a predetermined amount from the cylinder 1 .

It is the top view which showed only the cylinder of one Example of the syringe type container which concerns on this invention in the cross section. FIG. 5 is an enlarged perspective view schematically showing only one embodiment of an O-ring mounting groove provided with a plunger groove before mounting an O-ring. It is the expansion perspective view which showed typically only the part of the other Example of the O-ring mounting groove provided with one convex part of the plunger before mounting | wearing with an O-ring. It is the expansion perspective view which showed typically only the part of the other Example of the O-ring mounting groove in which the two convex strips of the plunger before mounting | wearing with an O-ring were provided. FIG. 3 is an enlarged cross-sectional view taken along line AA of FIG. 1 in a portion where the groove of FIG. It is the AA expanded sectional view of FIG. 1 in the site | part in which the protruding item | line part of FIG. 3 was provided. It is the AA line expanded sectional view of FIG. 1 in the site | part in which the two protruding item | line parts of FIG. 4 were provided.

Explanation of symbols

1 cylinder
1a Discharge part
1b opening
1c Finger hook 2 Plunger
2a Head
2b O-ring mounting groove
2c Rod part
2d pressing part
2e Groove or ridge 3 O-ring

Claims (5)

A cylindrical cylinder (1) having a tapered discharge part (1a) at one end and an opening (1b) having a finger hook part (1c) provided on the outer surface at the other end, in which paste is stored; A head part (2a) having a shape substantially conforming to the discharge part (1a) of the cylinder (1), followed by the head part (2a), an O-ring mounting groove (2b), a rod part (2c), and a pressing part (2d) Are installed sequentially in the plunger (2) for pushing the paste in the cylinder (1) toward the discharge part (1a) and the O-ring mounting groove (2b) of the plunger (2). A syringe type container comprising an O-ring (3), and air is passed through the O-ring mounting groove (2b) of the plunger (2) from the head part (2a) side to the rod part (2c) side, but the paste. A syringe-type container provided with a groove or a ridge (2e) that forms a channel that does not pass through the O-ring (3). 2. The syringe type according to claim 1, wherein the groove (2e) is formed by shallowly drilling an O-ring mounting groove (2b) of the plunger (2) from the head part (2a) side to the rod part (2c) side. container. The ridge (2e) is formed so as to protrude slightly from the head (2a) side to the rod (2c) side in the O-ring mounting groove (2b) of the plunger (2). Syringe type container. Two ridges (2e) are formed in the O-ring mounting groove (2b) of the plunger (2) slightly projecting from the head (2a) side to the rod (2c) side. The syringe-shaped container according to claim 1, wherein the syringe-shaped container is a ridge (2e). The syringe container according to any one of claims 1 to 4, wherein a plurality of grooves or ridges (2e) are provided in parallel to the axial direction of the plunger (2).

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