JPH0412991Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] In this invention, a predetermined amount of medicinal liquid is filled and sealed in the outer cylinder of a syringe in advance, and the seal is removed, a syringe needle is fitted, and the inner cylinder is closed. This invention relates to an improvement in a container-cum-syringe that can inject a medicinal solution simply by inserting and pushing it.

[Prior Art] As shown in FIG. 11, a conventional container syringe has a rubber gasket B liquid-tightly disposed inside an outer cylinder A of the syringe, and a barrel tip D sealed with a rubber cap C and the rubber gasket. It has a structure in which a specified amount of chemical liquid is pre-filled in the cylinder chamber E between the cap and the cap.
Preparation for injection is completed by fitting the needle base of the injection needle into the barrel tip D and screwing and fixing the threaded part H of the inner barrel G into the threaded hole F of the rubber gasket B.

The barrel tip D of this conventional container/syringe is the first
As shown in Figure 0, like a normal syringe,
A concave groove I is formed around the entire circumference at the connection part with the outer cylinder A.
The luer taper J on the outer circumferential surface of the cylinder tip D is used for a tight fit.

[Problems to be solved by the invention] The conventional container syringe shown in Fig. 11 has a small number of components, is easy to fill with drug solution, is easy to handle during use, and has a barrel tip that is similar to that of a regular syringe. Since it has a luer taper, it has advantages such as being able to use an ordinary injection needle, but in terms of sealing the drug solution, it is only a luer taper J that is used to fit a rubber cap C onto the tip D of the tube. Therefore, for example, replace the inner cylinder G with a rubber gasket B.
If a pressing force is applied from the inner cylinder G side when screwing it on, there is a risk that the rubber cap C may come off due to internal pressure, and even if the rubber cap C is removed and then refitted, this fact cannot be determined. There is also a risk of contamination of the area around the tip of the syringe and the drug solution from the tip D of the syringe.

[Purpose of the invention] In view of the current state of the conventional container syringe mentioned above, the present invention takes advantage of the advantages shown in FIG. 11, and also ensures the virginity of the container syringe filled with a drug solution. To provide a syringe that can be used as a container, which can be easily distinguished, and which prevents the cap externally fitted on the tip of the cylinder from coming off even if a pressing force is applied from the inner cylinder side.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a needle for a hypodermic needle that is connected via a concave groove to the outer barrel of a syringe, which is filled with a predetermined amount of drug solution in advance. An annular body made of a hard synthetic resin has a female screw hole with a diameter larger than the maximum outer diameter of the tube tip at the tip of the tube to which the base is attached, and has an inward flange on the end surface, which connects the inward flange and the outer tube. It is externally fitted by an undercut structure with a concave groove, and the gap between the outer circumferential surface of the barrel tip and the inner circumferential surface of the female screw hole serves as a fitting portion for the needle base of the injection needle, and the barrel tip An inner stopper is fitted into the extraction hole opening at the distal end surface of the cap, and a cap reaching the gap is tightly fitted onto the outer surface of the tip of the cylinder including the inner stopper, and is screwed into the female threaded hole. The bottom of the lumen is brought into close contact with the inner stopper, and adjacent portions of the outer peripheral surfaces of both the cap and the annular body are sealed with an easily breakable sealing material that spans the outer peripheral surfaces of both. The structure is such that there are

[Function] The present invention has the above-mentioned configuration, and the annular body made of hard synthetic resin that is fitted onto the tip of the outer barrel of the syringe has an undercut structure formed by its inward flange and the groove of the outer barrel. However, the barrel tip of ordinary syringes often has a concave groove around the continuous part with the outer barrel, so this concave groove can be used. In the present invention, an ordinary syringe having a barrel tip having the shape described above can be used.

The annular body described above is of the so-called luer lock type in which a female screw hole with a diameter larger than the maximum outer diameter of the tube tip is formed, and the gap between the inner circumferential surface of the female screw hole and the outer circumferential surface of the tube tip is Since the part is used as the fitting part for the needle base of the injection needle, an ordinary syringe can also be used as described above, so that it is possible to use an ordinary injection needle.

In addition, an inner stopper is fitted into the medicinal solution extraction hole that opens on the distal end surface of the tube tip, and a cap that is tightly fitted to the outer surface of the tube tip including the inner stopper is located between the tube tip and the annular body. When the cap reaches the gap, the flange corresponding to the male thread on the outer circumferential surface of the cap is screwed and engaged with the female thread on the annular body, so the cap will not come off unless it is rotated, and the inner cavity of the cap Since the bottom is in close contact with the inner plug, pressing force is applied from the inner cylinder side when screwing the inner cylinder into the rubber gasket inside the outer cylinder with a predetermined amount of chemical solution filled in the outer cylinder. Even if the cap is pressed, the cap resists this pressing force and completely prevents the inner stopper from falling off, the chemical solution from leaking, etc.

When fitting the injection needle, the cap can be easily removed by rotating the cap and unscrewing the male screw from the female screw hole.

Furthermore, as explained above, an easily breakable sealing material is provided on the adjacent portions of the outer circumferential surfaces of both the cap screwed into the female screw hole of the annular body and the annular body. The cap is attached by pasting a dot or by heat-sealing both the cap and the annular body in the form of dots. The sealing part must be broken and removed, and once the sealing material is broken, it cannot be resealed, so the virginity of the tip of the syringe filled with the drug solution can be guaranteed and contamination can be reliably prevented.

[Example] Figures 1 to 9 show an example of implementation, and an outer cylinder 1, which is the same as the outer cylinder A of the syringe shown in Figure 11, has a rubber gasket (not shown) between a rubber gasket and a cylinder tip 2. The cylinder chamber 3 is filled with a predetermined amount of chemical liquid.

The barrel tip 2 has a Luer tapered part 4, like the outer barrel A of a conventional ordinary syringe, has a concave groove 5 around the connection part with the outer barrel 1, and has an extraction hole 6 opened in the tip surface 7. has been done.

An annular body 9 made of hard synthetic resin, shown in FIGS. 3 and 4, having a female screw hole 8 having a diameter larger than its maximum outer diameter r is fitted onto the aforementioned tube tip 2. As shown in FIGS. This annular body 9 has an inward flange 10 on one end surface.
The inner circumferential edge 11 of this flange 10 has a first
As shown in FIG.
By fitting into the cylinder tip part 2, the undercut structure allows the cylinder tip part 2 to be externally fitted so as not to fall off.

When fitting, when the annular body 9 is press-fitted, the flange 10 is held together by the slight elasticity of the hard synthetic resin.
The inner circumferential edge 11 of the tube is inserted into the concave groove 5 by passing over the maximum outer diameter portion of the tube tip portion 2.

The structure shown in FIG. 2 is a state in which the annular body 9 is fitted to the tube tip 2 as described above, and the luer taper portion 4 of the tube tip 2 and the inner circumferential surface of the female threaded hole 8 of the annular body 9 are connected. The gap 12 between them is the fitting part for the base of a normal injection needle.

A rubber inner stopper 13 shown in FIGS. 5 and 6 is fitted into the opening of the extraction hole 6 that opens in the distal end surface 7 of the tube tip 2 to seal the opening.

A cap 14 that reaches the gap 12 is tightly fitted into the outer surface of the tube tip portion 2 including the inner stopper 13, that is, the Luer taper portion 4.

As shown in FIGS. 1, 7, 8, and 9, this cap 14 has an outwardly projecting flange 16 at the open end of a cylindrical portion 15 that is fitted onto the cylindrical tip 2. , 17, and the flanges 16, 17
achieves the function of a male thread as described below.

Further, a flange 18 is provided on the outer periphery of the substantially central portion of the cylindrical portion 15, and the inner cavity 19 of the cylindrical portion 15 is shaped so as to be able to fit closely against the luer taper portion 4 of the cylindrical tip portion 2, as shown in FIG. Cage, flange 16, 17
When the flanges 16 and 17 are engaged with the threads in the female threaded hole 8 of the annular body 9 and rotated, the cap 14 is guided by the thread in the female threaded hole 8. It is screwed toward the back of the gap 12, and finally, the inner cavity 19 comes into close contact with the Luer taper part 4 of the tube tip part 2, the inner cavity bottom 20 comes into close contact with the inner plug 13, and the inner plug 13 is inserted into the extraction hole 6. Press inward to open the extraction hole 6.
to be sealed. Outer peripheral surface 21 of the aforementioned flange 18
is the outer peripheral surface 2 of the annular body 9 as shown in FIG.
The diameter is located in the same plane as 2.

As explained above, the outer circumferential surface 21 of the cap 14 fitted onto the tube tip 2 and the outer circumferential surface 2 of the annular body 9 are
2 and 2 are sealed with an easily breakable sealing material 24 covering both outer circumferential surfaces.

This sealing material 24 can be applied by pasting a perforated paper sticker, surrounding it with a perforated heat-shrinkable film and sealing it by heat-shrinking the film, or sealing the cap and the annular body. Any means such as dot-like heat sealing of adjacent portions may be employed.

In addition, in Fig. 1, Fig. 3, and Fig. 4,
Reference numeral 25 indicates a protrusion that prevents slipping when gripping.

The container-cum-syringe according to the present invention has the configuration described above, and normally has the structure shown in FIG.
It is sealed with.

When injecting from this state, when the inner cylinder is screwed and fixed to the rubber gasket (not shown in FIG. 1), excessive pressing force acts on the rubber gasket, causing the internal pressure of the drug solution in the cylinder chamber 3 to Even if the pressure increases, the cap 14 pressing the inner stopper 13 is screwed into the female screw hole 8 of the annular body 9, which has an undercut structure and is firmly engaged with the outer cylinder 1. Even if the inner plug 13 is pressed by the increased internal pressure, the fitting will not come off.

Furthermore, in order to fit the syringe needle, the sealing material 24 is broken by rotating the cap 14 to unscrew it from the female screw hole 8, and the cap 14 can be easily removed from the annular body 9. , then remove the inner stopper 13 and remove the luer taper portion 4 which is the outer peripheral surface of the tube tip portion 2.
By fitting the needle base of the injection needle into the gap 12 between the female threaded hole 8 of the annular body 9 and the female threaded hole 8 of the annular body 9, installation of the injection needle is completed.

Of course, the sealing material 24 may be broken before the cap 14 is rotated.

As explained above, in the present invention, it is possible to utilize a container-cum-syringe having a conventional conventional Luer taper portion 4 and a conventional injection needle having a conventional conventional structure.

Moreover, since the sealing material 24 is always broken when the cap 14 is removed, whether or not the cap 14 has been removed can be easily determined by whether or not the sealing material is broken.

[Effects] The present invention has the structure and operation described above, and when using a conventional ordinary syringe and an ordinary injection needle, even if excessive internal pressure is applied when attaching the inner cylinder, etc. This has the effect of providing a syringe that also serves as a container, which does not cause leakage and guarantees the virginity of the syringe.

In the present invention, the annular body made of hard synthetic resin has an undercut structure and is fitted onto the tip of the outer barrel of the syringe. It can be firmly attached to the tip of the cylinder by using the annular body, and the gap between the female screw hole of the annular body and the outer peripheral surface of the tip of the cylinder is the fitting part for the base of the injection needle, so the annular body can be firmly attached to the tip of the cylinder. Even though the body is fitted onto the barrel tip, a conventional injection needle can be used.

The female screw hole of the annular body mentioned above is also used for screwing the cap, and the cap presses the inner stopper against the opening of the extraction hole while keeping it in close contact with the outer circumferential surface of the barrel tip.
Because it is screwed into the female threaded hole, when attaching the inner cylinder to the rubber gasket placed inside the outer cylinder, excessive pressing force acts on the chemical liquid in the cylinder chamber through the gasket, causing the chemical liquid to drop. Even if the internal pressure becomes high, it is possible to completely prevent the inner stopper from escaping, which has the effect of preventing unexpected leakage of the chemical solution.

Since the aforementioned cap is simply screwed into the female screw hole of the annular body, when the injection needle is to be fitted, the cap can be easily removed by simply unscrewing it.

Furthermore, since the adjoining parts of the outer peripheral surfaces of both the cap and the annular body are sealed with a seal piece attached to the outer peripheral surfaces of both, once the cap is removed, the seal piece is broken, so the cap Whether or not the seal has been removed can be easily determined by the presence or absence of breakage of the seal piece, which also has the effect of ensuring the virginity of the container/syringe.

[Brief explanation of the drawing]

Fig. 1 is an enlarged longitudinal sectional view of an example of the embodiment, Fig. 2 is an enlarged longitudinal sectional view of the structure shown in Fig. 1 with the cap removed, Fig. 3 is an enlarged front view of the annular body, and Fig. 4 is an enlarged longitudinal sectional view of the annular body. Figure 3 is a cross-sectional view taken along the line in Figure 5, Figure 5 is an enlarged side view of the inner stopper, Figure 6 is a right side view of what is shown in Figure 5, Figure 7 is an enlarged front view of the cap, and Figure 8 is Figure 7. 9 is a rear view of the one shown in FIG. 7, FIG. 10 is an enlarged longitudinal sectional view of the tip of a normal syringe outer barrel, and FIG. 11 is an enlarged longitudinal sectional view of a conventional container-doubling syringe. It is a diagram. 1...Outer cylinder, 2...Cylinder tip, 5...Concave groove, 6...
...Extraction hole, 7...Tip surface, 8...Female screw hole, 9...
...Annular body, 10...Inward flange, 12...Gap, 13...Inner stopper, 14...Cap, 20...
...Inner cavity bottom, 21, 22...Outer peripheral surface, 23...Adjacent portion, 24...Sealing material.

Claims (1)

[Scope of utility model registration request] A female screw hole with a diameter larger than the maximum outer diameter of the barrel tip is provided at the tip of the syringe, which is connected to the outer barrel of the syringe filled with a predetermined amount of drug solution through a concave groove, to which the base of the injection needle is attached. An annular body made of a hard synthetic resin having an inward flange on the end face is fitted onto the outside by an undercut structure between the inward flange and the groove of the outer cylinder, and the outer circumferential surface of the cylinder tip and the The gap between the internal circumferential surface of the female threaded hole is used as a fitting part for the needle base of the injection needle, and an inner stopper is fitted into the extraction hole that opens on the distal end surface of the barrel tip. A cap that reaches the gap is tightly fitted onto the outer surface of the tip of the cylinder, and is screwed into the female threaded hole, with the bottom of its lumen being brought into close contact with the inner stopper, and the cap and the annular body are connected to each other. The adjacent part of the outer peripheral surface of both is,
A container-cum-syringe whose outer peripheral surfaces are sealed with an easily breakable sealant.