JP4646658B2 - Prefilled syringe - Google Patents

Description

  The present invention relates to a prefilled syringe that can immediately determine whether or not it has been opened before use.

  In order to prevent impurities from being mixed into the medicine filled in the cylinder and to maintain a hygienic state, the prefilled syringe is at least covered with a cap on the injection needle connecting portion and is provided with some packaging.

  The packaging situation of the prefilled syringe according to the above-mentioned conventional technique is to cover only the injection needle connecting part, and to cover the whole with a vacuum pack or a blister pack, etc. It is in a state where foreign substances can be intentionally mixed in, and the covered cap may be inadvertently removed, which has a problem in maintaining hygiene and in medical safety management.

  In view of the above situation, the present invention provides a prefilled syringe that can be easily packaged and is free from intentional or inadvertent contamination, and that can be immediately found when opened. Let it be an issue.

  In order to solve the above-mentioned problems, the present invention forms an injection needle connecting portion at the tip, fills a cylinder into which a slide plug is loaded inside the rear end opening, and covers the injection needle connecting portion with a cap. In the prefilled syringe, the cap is covered with a shrink film from the cap to the outer peripheral surface of the cylinder, and when the cap is removed from the injection needle connecting portion, the covered shrink film is cut off at the tip of the cylinder. Specifically, forming a corrugated perforation or a half cut line in the cut portion of the shrink film, if necessary, providing a thread on the rear surface of the slide plug, A male screw provided at the plunger tip can be screwed into this screw thread, or the coated shrink film On the surface of the arm is what made it possible to display printing. Although not shown, a plunger can be fixed to the rear surface of the slide plug.

  According to the present invention configured as described above, since the shrink film is applied to the coating from the injection needle connecting portion of the prefilled syringe to the outer peripheral surface of the cylinder, it can be packaged very easily, and the corrugation is formed at the tip portion of the cylinder. Since the perforation or half cut line is formed to make it easy to separate, it can be easily opened when necessary, and the opening after opening has a corrugated shape, and its tip is rolled up and opened. It becomes clear at a glance and can be used for maintaining hygienic conditions and medical safety management.

  Next, description will be made with reference to embodiments of the present invention.

  1 and 2 show a first embodiment of the present invention. A prefilled syringe is provided with an injection needle connecting portion 11 at the tip, a slide plug 13 is fitted into the rear end opening of the cylinder 12 and a medicine 14 is filled therein. 10 is covered with a shrink film 16 from the cap 15 to the outer peripheral surface of the cylinder 12, and the shrink film 16 has a perforated line M shown in FIG. Is provided. The perforation may be either the arc-shaped waveform in FIG. 5A or the continuous chevron in FIG. 5B, with one side of the continuous chevron slightly extended as shown in FIG. A zipper J can also be used. In this case, when the cap-side shrink film is twisted, the end of the zipper J is lifted and easily broken. The perforation pitch is generally about 1 to 5 mm, although it depends on the size of the syringe.

  A screw 17 is provided at the center of the rear surface of the slide plug 13, and a male screw 19 at the tip of the plunger 18 is screwed into the screw 17.

  1 and 3 show a second embodiment of the present invention, and since the portion of FIG. 1 is the same as that of the first embodiment, the description thereof will be omitted and FIG. 3 will be described.

  A corrugated half-cut line C is formed at the tip of the cylinder 12 of the shrink film 16 covered from the cap 15 to the cylinder 12, and is a trapezoidal waveform in FIG. 3 (a) and continuous in FIG. 3 (b). Although it is a chevron half-cut line, it may be an arcuate waveform as in the first embodiment.

  FIG. 4 shows a third embodiment of the present invention. When the cap 15 is removed from the injection needle connecting portion 11, a ridge R is provided on the outer periphery of the cylinder 12 so that the shrink film 16 can be easily separated at the tip of the cylinder. When the shrink film 16 is thermally shrunk, it is thinned by the ridges of the ridges. In addition, it can replace with the said protruding item | line R, and can be set as the continuous protrusion, and the said protruding item | line or the continuous protrusion can also be made into a waveform.

FIG. 5 shows a fourth embodiment of the present invention. Since the portion of FIG. 1 is the same as that of the first embodiment, the description thereof will be omitted and FIG. 5 will be described.

A circumferential perforation M is formed at the tip of the cylinder 12 of the shrink film 16 covered from the cap 15 to the cylinder 12, and the Y is directed intermittently along the perforation M in the axial direction of the cylinder 12. A character-shaped cut K is formed , and each cut K is continuous to the perforation M with a Y-shaped leg end.

  In this way, by intermittently forming a Y-shaped cut K along the circumferential perforation M, the cap 15 can be easily opened regardless of which direction it is turned, and the Y-shaped end is wing-shaped after opening. The anti-tampering effect is enhanced.

  In addition, display printing such as precautions for handling can be performed on the surface of the shrink film, particularly in the vicinity of the detached portion.

It is sectional drawing of a prefilled syringe, (a) The thing without a plunger and (b) The thing with a plunger are shown. The partial front view of a 1st Example shows the modification of (a) circular-arc waveform perforation, (b) continuous angle perforation, and (c) and (b). In the partial front view of the second embodiment, (a) a trapezoidal waveform half-cut line and (b) a continuous chevron half-cut line are shown. Partial sectional view of the third embodiment Partial front view of the fourth embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Prefilled syringe 11 Injection needle connection part 12 Cylinder 13 Slide plug 14 Drug 15 Cap 16 Shrink film 17 Screw 18 Plunger 19 Male thread C Half cut line J Zipper M Perforation K (Y-shaped) cut R Convex

Claims (1)

Tip needle-connecting portion (11) is formed, filled with a drug (14) in the loaded cylinder (12) in the slide plug (13) inside the rear end opening, the needle-connecting portion (11) in the cap (15) prefilled syringe capped with (10), from the cap (15) over the outer peripheral surface of the cylinder (12) covered with shrink film (16), the shrink film (16), the cap ( 15) When removing the needle connection part (11) , the coated shrink film (16) is separated at the tip of the cylinder (12) ,
To form a perforation (M) to the disconnect portion around the shrink film (16), Y-shaped lump cut facing the axial direction of the cylinder along the perforations (M) (12) to (K) A prefilled syringe which is formed intermittently and each cut (K) is continuous with the perforation (M) with a Y-shaped leg end .

Images