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Pre-filled syringe

A pre-filled syringe and plunger technology, applied in the directions of syringes, ampoule syringes, hypodermic injection instruments, etc., can solve problems such as difficult installation work, detachment of plunger rods, and liquid leakage.

Active Publication Date: 2014-04-09
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, if Figure 11 As shown, the tip of the rod 164 is deformed due to contact with the plunger, so there is a high possibility of liquid leakage.
[0021] In this syringe, as in Patent Documents 6 and 7, the installation work is not easy, and there is a risk that the plunger rod will come off after installation.

Method used

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Examples

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Embodiment Construction

[0092] Next, the prefilled syringe of the present invention will be described.

[0093] The prefilled syringe 1 of the present invention is composed of a prefilled syringe main body 10 and a plunger 4. The prefilled syringe main body 10 is composed of an outer cylinder 2, a gasket 3 slidably accommodated in the outer cylinder 2, and a gasket 3 for sealing the outer cylinder. The sealing member 5 at the front end opening of the cylinder 2 is composed of the medicine 8 accommodated in the medicine storage part formed in the outer cylinder 2, and the plunger 4 can be attached to the gasket 3 and is not attached to the gasket. 3 status.

[0094] The gasket 3 includes: a gasket main body 6, which is a cylindrical body with a closed front end and an open rear end, and the gasket main body 6 has an inner cavity portion 60 extending from the opening at the rear end to the front end side; a plunger mounting member 7, It is mounted on the spacer body 6 . The plunger mounting member 7 ...

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Abstract

A prefilled syringe (1) of the present invention has a gasket (3) composed of a gasket body (6) and a plunger-mounting member (7). The plunger-mounting member (7) has a distal part (71), spiral ribs (74, 75) formed on an outer surface of the distal part (71), a flange part (72), and a plunger-mounting part formed on an inner surface of a hollow part. The gasket body (6) has a spiral screwing part (63) which screws the spiral ribs (74, 75) and an accommodation part (62) for accommodating a portion where the spiral ribs (74, 75) are formed. A plunger (4) has a mounting distal part (40). The plunger-mounting part has a spiral concave portion (79) and an engaging rib (76) disposed at a side distal from the spiral concave portion (79). The mounting distal part (40) of the plunger (4) has a spiral projected portion (42) capable of screwing the spiral concave portion (79) and an engaging portion (41) which engages the engaging rib (76) of the plunger-mounting member (7).

Description

technical field [0001] The present invention relates to a prefilled syringe prefilled with a medicament. Background technique [0002] Many types of syringes have been used conventionally, and recently, many syringes are used while being attached to syringe pumps. In addition, prefilled syringes filled with medicines in advance have been widely used in recent years, and such prefilled syringes may be attached to syringe pumps and used. [0003] A method called vacuum plugging (Japanese: vacuum plugging) is generally used to insert a gasket into a prefilled syringe. In this method, the outer cylinder with the front opening closed is filled with a drug The gasket is placed in the opening of the outer cylinder under a reduced pressure atmosphere (vacuum atmosphere), and then the surrounding environment is changed to a normal pressure state to insert the gasket into the outer cylinder. When the plunger is attached, it is difficult to dispose the gasket to the opening of the ou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/315A61M5/28
CPCA61M5/1458A61M5/1452A61M5/31515
Inventor 冲原等渡边英男
Owner TERUMO KK
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