RU204131U1 - SYRINGE PEN - Google Patents

Abstract

The utility model relates to medical equipment for subcutaneous, intravascular and intramuscular injection of media into the body - ampoule syringes, namely, dosing syringes with a needle used in combination with replaceable ampoules or cartridges. The technical result of the utility model is to increase the reliability of the syringe pen and the accuracy of the dosage of the drug, which is achieved due to the fact that the syringe pen containing a collapsible body, a mechanism for transferring the rotational motion of the rotation drive to the reciprocating movement of the rod and a dose counter, characterized by that the rotation drive is made in the form of a handle, made with the possibility of its rotation by the muscular force of a person and mounted from the end of the body with a transmission mechanism, the connection of the said handle with the body is equipped with a stepped spring lock made with the possibility of elastic locking of the handle position around the body at the point of its connection with the handle has a circular scale for manual counting of the dosage, and on the handle opposite the said scale there is a notch that can be combined with the risks of the ring scale, a duplicate rectilinear scale is applied along the part of the body intended for installing a cartridge with a drug manual calculation of dosage. 4 c.p. f-ly, 2 dwg

Description

The utility model relates to medical technology for subcutaneous, intravascular and intramuscular administration of media into the body - ampoule syringes, namely, dosing syringes with a needle used in combination with replaceable ampoules or cartridges [A61M 5/24].

A SYRINGE-PEN FOR INJECTION is known from the prior art [RU2696451 C1, publ. 08/01/2019], including a body equipped with a push button, the body contains a dose setting regulator connected to the push button and installed with the ability to move in the longitudinal direction relative to the body, a cylindrical drive installed inside the dose setting regulator with the possibility of longitudinal movement relative to the body, when this, the drive is in engagement with the dose setting regulator, the rod installed in the cylindrical drive, the dose delivery screw installed inside the rod, and the adjusting ring, which is in engagement with the dose setting regulator, mounted on the rod with the possibility of rotation relative to it and containing protrusions on the inner side, and on the outer surface of the stem are formed recesses, and the adjusting ring is installed on the stem in such a way that the projections of the adjusting ring together with the recesses of the stem form a ratchet engagement.

The disadvantage of the analogue is the low reliability and accuracy of the dosage due to the complexity of the design and the option of manufacturing the regulator for setting the dose.

Also known SYRINGE-PEN, FINE ADJUSTMENT [RU2721930 C1, publ. 05/25/2020], which contains: a differential screw transmission mechanism containing a push rod, a push rod nut, a positioning rotary ratchet, an adjusting rod and a ratchet tube; a dose adjusting mechanism containing an adjusting knob, a tube with a digital code, an adjusting tube, a ratchet connection ring, and an adjusting connecting tube; the case, while the differential screw transmission mechanism is located in the case, the window is located on the case, and the handle core holder is also located in the case; and a mechanism for performing an injection comprising a button connection member, a button and a button spring.

The disadvantage of the analogue is the complexity of the design due to the peculiarities of the use of the product - first, the dose amount is set, and then by pressing the button, the feed mechanism is activated, as well as the lack of data on the accuracy of the dosage of the drug, which can be provided by this syringe pen.

The closest in technical essence is the PENDIQ 2.0 SYRINGE-PEN [https://pendiq.com/en/insulin-pen, publ. 12/02/2018], containing a plastic housing consisting of two halves, while the lower half is made in the form of a hollow cylinder with the possibility of placing a cartridge with a dosage preparation in it, a means for connecting with a needle is mounted at the end of the said half, an electric rod drive is mounted in the second half of the housing engaging with an electronic regulator for setting the dose.

The main technical problem of the prototype is the low accuracy of the dosage of the drug due to the inertia of the applied electric drive, to exclude which it is necessary to take into account the amendment, as well as low reliability due to the complex design and the inability to manually supply the drug in case of failure of the batteries of the electronic regulator for setting the dose.

The task of the utility model is to eliminate the shortcomings of the prototype.

The technical result of the utility model is to improve the reliability of the pen and the dosage accuracy of the medicinal product.

The specified technical result is achieved due to the fact that a syringe pen containing a collapsible body, a mechanism for transmitting the rotational motion of the rotation drive to the reciprocating movement of the rod and a dose counter, characterized in that the rotation drive is made in the form of a handle made with the possibility of its rotation muscular by human force and mounted from the end of the housing with the transmission mechanism, the connection of the said handle with the housing is provided with a stepped spring lock made with the possibility of elastic locking of the handle position, an annular scale is applied around the housing at the point of its connection with the handle for manual dosage counting, and on the handle opposite the mentioned the scale is marked with a notch so that it can be aligned with the risks of the ring scale; a duplicate rectilinear scale for manual calculation of the dosage is applied along the part of the housing intended for the installation of the cartridge with the drug.

In particular, an annular scale is applied to the movable dial with the possibility of setting zero during dosage.

In particular, the ring scale is double.

In particular, the rectilinear scale is double.

In particular, the graduation of the dual scales is made with the possibility of manually calculating the dosage of the drug contained in cartridges with different internal volumes.

Brief description of the drawings.

FIG. 1 shows a front view of a syringe pen.

Figure 2 shows a cross-section of a syringe pen.

The figures indicate: 1 - transmission mechanism housing, 2 - cartridge holder, 3 - rod, 4 - handle, 5 - nut, 6 - spring clip, 7 - sockets, 8 - dose counter, 9 - scoreboard, 10 - buttons, 11 - ring scale, 12 - notch, 13 - scale.

Implementation of the utility model.

The insulin pen-syringe consists of a transmission mechanism housing 1 (see Figure 1) and a cartridge holder 2, connected by a detachable, for example, threaded connection. The ends of the housing of the transmission mechanism 1 are made open. A rod 3 with a thread applied to it is mounted inside the housing of the transmission mechanism 1.

From the end of the housing of the transmission mechanism 1, a handle 4 is movably mounted, inside which a nut 5 is mounted, forming a screw pair with a rod 3 with the possibility of converting the rotational movement of the handle 4 into a reciprocating movement of the rod 3. The movable connection of the handle 4 with the housing of the transmission mechanism 1 is made, for example , in the form of a tongue-and-groove connection. What is new is that the mentioned connection of the handle 4 with the housing of the transmission mechanism 1 is provided with a stepped spring latch 6, made with the possibility of locking the handle 4 rotating relative to the housing of the transmission mechanism 1.

The spring retainer is made in the form of an elastic retainer 6, for example, a ball embedded in a cylindrical hole made in the handle 4 or the housing of the transmission mechanism 1 and loaded with a compression spring. In the opposite part along the perimeter of the circle, sockets 7 are made with the possibility of interaction with the spring clip 6 with a predetermined pitch.

In another embodiment, the spring clip 6 is made in the form of a flat spring with a protrusion (not shown in the figures).

The rod 3 is communicated by a transmission, for example, a worm gear with a dose counter 8, mounted in the housing of the transmission mechanism 1 and equipped with an electronic display 9 with counter control elements made in the form of buttons 10.

In one embodiment, at least one annular scale 11 is applied to the outside of the housing of the transmission mechanism 1 at the point of its connection with the handle 4 for manual calculation of the dosage. For this, on the handle 4, opposite to the mentioned scale 11, a notch 12 is applied with the possibility of aligning the handle 4 with the risks of the ring scale 11.

Alternatively, there can be several ring scales 11, while the graduation of the ring scales 11 differs with the possibility of manual calculation of the dosage of the drug contained in cartridges that differ in internal volume.

For example, for insulins from Novo Nordisk (Actrapid, Novorapid, Levemir, Tresiba, Protafan), dose counter 8 and ring scale 11 are calibrated in increments of 1/150 units, and for other insulins (Lantus, Humalog, Humulin, Apidra, Rosinsulin, Bioinsulin, Rinsulin, etc.) in increments of 1/135 units.

To exclude errors of use when applying several ring scales 11, each of them is applied in a different color.

In one embodiment, the annular scale 11 is applied to a movable dial (not shown in the figures) mounted on the housing of the transmission mechanism 1 and made with the possibility of setting zero at dosage, which is also new in the existing technical object.

The holder of the cartridge 2 is made hollow at the end of which an opening is made for the withdrawal of the means for connecting the cartridge with the drug with the needle (not shown in the figures). The holder of the cartridge 2 is made transparent or at least a window is made in it with the possibility of visual control of the preparation in the cartridge.

Along the holder of the cartridge 2, there is a scale 13 for manual dosage of the drug. The scale 13 can be made double-sided with the possibility of manual dosage of the drug contained in cartridges with different internal volume.

At the base of the cartridge holder 2, at the point of its connection with the housing of the transmission mechanism 1, an external thread is made with the possibility of mounting a protective cap over the cartridge holder 1 (not shown in the figures).

A pen syringe is used to accurately dose a drug when it is injected intramuscularly into the body.

To prepare the pen for operation, remove the protective cap from the cartridge holder 2 and detach the cartridge holder 2 from the body of the transmission mechanism 1. A cartridge with a drug is inserted inside the cartridge holder 2, aligning the hole at the end of the cartridge holder 2 with the means for connecting the cartridge to the needle. Connect the cartridge holder 2 with the installed cartridge to the housing of the transmission mechanism 1.

The sterile needle itself, placed in its own cap, is mounted to the means of connecting the cartridge to the needle. The cap is removed from the needle and by rotating the handle 4, its rotational movement is transmitted by means of a screw pair formed by the rod 3 and the nut 5 into the reciprocating movement of the rod 3. The rod 3, moving, exerts pressure on the cartridge piston (not shown in the figures) and promotes the displacement of the drug. the drug from the cartridge. At least one drop of the drug is displaced, together with which air is removed from the cartridge and needle to exclude the appearance of hematomas at the injection site and painful sensations.

Then, by pressing one of the buttons 10 on the dose counter 8, the readings on the display 9 of the said counter 8 are reset to zero and the dosage step of the drug is selected. In the event of the inoperability of the dose counter 8, the position of the notch 12 relative to the annular scale 11 is visually fixed, and in the embodiment on the body of the transmission mechanism 1 of the dial, the said dial is rotated until it aligns with the notch 12 of the zero of the annular scale 11.

To inject the drug, the needle 7 is inserted into the body and holding the syringe pen, the handle 4 is rotated pushing the piston of the cartridge with the rod 3 and thereby displacing the drug, while the spring lock 6 provides controlled rotation of the handle 4 and excludes the possibility of accidental overdose of the drug during involuntary rotation of the handle 4. The administered dose of the drug is controlled on the display 9 of the dose counter 8 or on the ring scale 11, or on the scale 13 in the case of a large dose of the administered drug and no need for an accurate dosage.

After completing the procedure, the needle is removed from the body. Then, in reverse order, the cap is attached to the needle, and the protective cap is attached to the pen-syringe.

The technical result of the utility model is to increase the reliability of the syringe pen and the accuracy of the dosage of the medicinal product by duplicating the graduations in increments of 1/135 and 1/150 units. the drug to be administered for different cartridge volumes on the dose counter 8 and the ring scale 11 (ring scales) and simplification of the transfer mechanism to one screw pair formed by the rod 3 and the nut 5 and one worm gear between the rod 3 and the dose counter 8. Using only muscle strength a person to rotate the handle 4 and the use of the above mechanisms for converting the rotational movement of the handle 4 have a consequence of increasing the autonomy of the pen and eliminates the need to control the charge of the batteries used for the operation of electric motors used in similar solutions. The implementation of the spring clip 6 in the transmission mechanism ensures controlled rotation of the handle 4 and excludes the possibility of an accidental overdose of the drug during the involuntary rotation of the handle 4, which also increases the dosage accuracy.

In 2016, in accordance with the above description, the author made several samples of insulin syringes with a minimum stroke of 3 0.001 mm, which made it possible to dose insulin with an accuracy of at least 1/135 for most cartridges produced by well-known companies. The ability to dose insulin with the specified accuracy makes it possible to use the described device for the safe treatment of patients with low body weight, excluding insulin overdose.

Claims (5)

1. A syringe pen containing a collapsible body, a mechanism for transferring the rotational motion of the rotation drive to the reciprocating movement of the rod and a dose counter, characterized in that the rotation drive is made in the form of a handle made with the possibility of its rotation by human muscle power and mounted from the end of the body with a transmission mechanism, the connection of the said handle with the body is provided with a stepped spring lock made with the possibility of elastic locking of the handle position, an annular scale is applied around the body at the point of its connection with the handle for manual dosage counting, and on the handle opposite the said scale there is a notch with the possibility of its alignment with the marks of the ring scale, along the part of the body intended for the installation of the cartridge with the medicinal product, there is a duplicate rectilinear scale for manual calculation of the dosage. 2. The syringe pen according to claim 1, characterized in that the annular scale is applied to the movable limb with the possibility of setting zero during dosage. 3. A pen-injector according to claim 1, characterized in that the annular scale is double. 4. A pen according to claim 1, characterized in that the rectilinear scale is double. 5. A pen-injector according to claim 1, characterized in that the graduation of the double scales is made with the possibility of manually calculating the dosage of the drug contained in the cartridges, which differ in internal volume.

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