SU1690779A1 - Syringe - Google Patents

Abstract

The invention relates to medical technology and reduces the likelihood of reuse by increasing the reliability of the separation of the rod and piston. For this, the syringe body 1 is installed in the stopper 6 with the internal groove 8 in it, while the rod 9 is located in the stopper 6 and its thickening 11 is covered by an elastic piston shoulder 19. The housing 1 may have a protrusion in its lower part, interacting with the sealing element 17 of the piston, and the piston - a removable element that interacts with the channel 3 of the needle holder 2. 1 Cpf-ly, 5 ill.

Description

The invention relates to medical technology, namely to devices for administering liquid drugs into the human body and for suctioning body fluids used once.

The aim of the invention is to reduce the likelihood of reuse by increasing the reliability of the disconnection of the rod and piston.

Figure 1 shows a syringe in front of the set of the drug; figure 2 - the same, with a modified inner part of the syringe; on fig.Z - syringe after a set of the drug; Fig. 4 shows the syringe after the injection; figure 5 - node I in Fig, 4.

The syringe includes a housing 1, in the needle holder 2 of which there is a channel 3 with a hollow needle 4 hermetically sealed in it, and in the upper part 5 there is a stop 6, made in the form of a housing 7 with a longitudinal axial hole and with an internal groove 8, rod 9, rod 10 which is installed in the hole of the limiter 6 and has a protrusion with a thickening 11 and with through channels 12 at its end 13, a piston 14 mounted inside the housing 1 and provided with a head 15 with a shoulder 16, a sealing element 17, a notch 18 with a length exceeding the length of the rod 10 stock 9, and with an elastic collar 19 in contact with the inner walls of the restrictor 6 and covering in the recess 18 of the piston 14 thickening 11 of the rod 9, a cap 20 mounted on the needle holder 2 of the housing 1 and closing the needle 4, and inside the cap may be a sterilizing agent, such as alcohol. The location of the ledge 16 of the piston 14 relative to the elastic shoulder 19 corresponds to the location of the internal bore 8 of the restrictor 6 relative to its end, which is able to contact the shoulder 16 of the piston 14, and the height of the bore 8 of the limiter 6 is greater than the total length-thickening 11 of the protrusion of the rod 9 and the elastic shoulder 19 of the piston 14 .

The syringe also contains a protrusion 21, made on the inner surface of the housing 1 from the side of the needle holder 2 and having the ability to provide removal

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a sealing element 17 with a piston 14 provided with a removable element 22 mounted on the head 15 with the possibility of being placed in the channel 3 of the needle holder 2.

The syringe works as follows.

The cap 20 is removed from the housing 1. By removing the stem 9 from the housing 1, a set of the drug is delivered into the syringe through the needle 4. In this case, the stem thickening 11 contacts the collar 19 of the piston 14, the opening of which is impeded by the inner walls of the restrictor 6. At the end the piston head 15 of the piston 14 abuts against the stop b in its shoulder 16, while the elastic piston shoulder 19 of the piston ends up in the bore 8 of the restrictor b, the thickening 11 of the rod 9 leaves the engagement with the collar 19 and abuts the corresponding walls of the bore 8 of the restrictor 6. The syringe is ready for rovedeniyu injection.

The injection is made by supplying the rod 9 to the inside of the housing 1, while the thickening 11 of the rod 9 contacts the collar 19 of the piston 14 without their mutual engagement; at the end of the movement of the rod 9, the elastic collar 19 of the piston 14 completely leaves the restrictor 6.

When using a syringe with a protrusion 21, the latter contributes to the removal of the sealing element 17c of the piston 14, while the element 22 is pushed by the head 15 of the piston 14 into the channel 3 of the needle holder 2, blocking the channel itself and the needle 4.

Claims (2)

1. Syringe holding the body with the needle holder and placed inside it piston, which is made notch with a collar, in which | a protrusion of the stem protrusion has been established, denounced by the fact that in order to reduce the likelihood reusability by increasing the reliability of the disconnection of the rod and piston, it is provided with a hollow needle made in one piece with the needle holder and placed inside the body with the side opposite to the needle holder is a limiter, made in the form of a housing with a longitudinal axial hole and with an internal groove, the height of which is greater than the total length of the protrusion of the rod and the collar, made elastic and installed in the stopper with the possibility of grasping the thickening of the protrusion of the rod, made with through channels, and the piston is made with a shoulder having the possibility of contact with the corresponding end side of the limiter while simultaneously placing a piston pocket in its annular groove, wherein the length of the piston groove is longer than the rod length. 2. A syringe according to claim 1, characterized in that a protrusion is made on the inner surface of the housing from the needle holder side, which is capable of removing the sealing element with which the piston facing the needle holder is provided with a removable element mounted with the possibility of placing in the needle holder channel. Uh f T / TL & Ј Ljw U / U I 1.1 IJ $ f -four