RU2819704C1 - Carpule injector - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: said task is achieved by the fact that the carpule injector comprises a body made in the form of a cylindrical part with a cavity for the carpule and visual inspection windows, on its one side there is a stop handle, and on the other one there is an external thread, on which a cap with a threaded tip for installing the needle and a rod are installed, a locking handle is additionally introduced, made with possibility of movement along the axis of the body, wherein the shape of the locking handle repeats the shape of the stop handle, through holes are made on the body in the part of the stop handle, fixing the position of the locking handle in the preliminary and working positions, inside the body there is a carpule, in which a rod tip is introduced, wherein on the rod on the side of the tip there is an annular belt, on the cylindrical part of the housing there is a protective cover having visual inspection windows. Locking handle is made with a hole for arrangement of rod, and attachment to housing is carried out by means of bending hooks, and is installed in the housing slots, which are guides for its movement inside the housing along the axis, besides, on the inner part of the housing, on the thread side, there are projections limiting the movement of the carpule. Protective cover has a belt with a decrease in diameter for fixation in the extended position on the limiting belt of the cap and is fixed on the body by means of a tongue-and-groove connection.

EFFECT: invention is aimed at expansion of functional capabilities due to simplicity of design and efficiency of use, since injector is made with possibility to puncture membrane of carpule with the help of stop handle.

5 cl, 9 dwg

Description

The invention relates to medical equipment, namely to devices for subcutaneous, intramuscular and intravenous administration of drugs placed in cartridges in liquid form, and in particular to single-use injection devices, including local anesthesia in dentistry.

A disposable carpule injector is known (RF patent for invention No. 2459639, published on August 27, 2012), which contains a cylindrical body, at one end of which there is a finger stop handle with a hole at the end for installation with the possibility of moving a stop rod with a rod-shaped tip, and at the opposite end - a sleeve for a double-edged needle, a carpule installed in the body with the possibility of contact between the carpule piston and the tip of the stop rod, and a fastening element with a double-edged injection needle. The sleeve for a double-edged needle is equipped with a thread for attaching a fastening element with a double-edged injection needle and a protective needle cap to it.

The disadvantage of the design is that it is labor-intensive to use due to the fact that the body on the sleeve side has movable protrusions that expand when the carpule passes into this area and fix it in this position, which prevents the carpule from being removed after use.

The design of a carpule injector is also known (patent
RF No. 2721823, publ. 06/22/2020), which contains a body and a rod equipped with finger stops to allow forward and return movement of the rod relative to the body. The body contains a cavity for the carpule, a mount for the carpule needle, holes for the rod and said needle, a protrusion for limiting the return stroke of the rod, and a working cavity for limiting the return stroke of the rod. The housing is characterized by the ability to visually control the carpule and limit the movement of the carpule during forward and return strokes of the rod. The rod is made with a carpule piston pusher and a rod return stroke limiter. The working cavity for limiting the return stroke of the rod is located between the cavity for the carpule and the protrusion for limiting the return stroke of the rod. The rod return limiter is located on the head of the rod body. The dimensions of the working cavity are selected from the condition of free return movement in this cavity of the said limiter to a distance not exceeding the thickness of the carpule piston.

The disadvantage of the known design is that it is labor-intensive to prepare the carpule injector for use, since the installation of the dental needle and puncture of the carpule membrane are carried out immediately before use, and this increases the preparation time for its use and creates additional labor intensity.

The effectiveness and success of local anesthesia in dentistry primarily depends on the instruments used for the injection.

The objective of the claimed invention is to expand the functionality of the injector.

The technical result of expanding the functionality is simplicity and efficiency of use, since the injector is designed to pierce the carpule membrane, is supplied in sterile form with a needle already screwed on and with a pre-installed carpule, and the use of the carpule is carried out with a simple movement - by piercing the membrane with a needle during transfer latch handles from the preliminary position to the working position.

The objective is achieved by the fact that the carpule injector contains a body made in the form of a cylindrical part with a cavity for the carpule and visual control windows, on one side there is a handle-stop, and on the other there is an external thread on which a cap with a threaded tip for installation is installed needles, and a rod, a latch handle is additionally introduced, made with the ability to move along the axis of the body, and the shape of the latch handle repeats the shape of the handle-stop; on the body, in the part of the handle-stop, through holes are made that fix the position of the latch handle in the preliminary and working positions, inside the body there is a carpule into which the tip of the rod is inserted, and an annular belt is made on the rod on the side of the tip; a protective cover is installed on the cylindrical part of the body, which has visual inspection windows. The latch handle is made with a hole for positioning the rod, and the fastening to the body is carried out by means of bending hooks and installed in the grooves of the body, which are guides for moving it inside the body along the axis, and on the inside of the body, on the thread side, there are protrusions that limit the movement of the carpule . The protective cover has a section (belt) with a reduced diameter for fixing in the extended position on the limiting belt of the cap and is fixed to the body by means of a tongue-and-groove connection.

The essence of the invention is illustrated by drawings, which depict one of the possible implementations of the carpule injector design:

in fig. 1 - general view of the product;

figure 2 - injector body;

Fig. 3 is a sectional view of the injector body;

Fig. 4 - injector latch handle;

figure 5 - injector cap;

Fig. 6 - protective cover of the injector;

Fig. 7 is a section through the protective cover of the injector;

Fig. 8 - injector rod;

in fig. 9 - view of the product in different positions.

The carpule injector consists of the following components: injector body 1, protective cover 2, latch handle 3, rod 4, cap 5, into which the dental needle 6 is installed (Fig. 1).

The injector body 1 is a complex geometric figure, consisting on one side of a housing handle-rest 7 with a hole 8 for installing a latch handle 3. The cylindrical part of the body 1 is made with a visual inspection window 9, and at the end of the body 1 there is a two-start thread 10 , providing reliable fastening with a protective cap 5.

On both sides of the housing 1 there are grooves 11 in the form of through rectangular holes, which serve to fix the latch handle 3 in two positions - preliminary (Fig. 9 - Position 1) and working (Fig. 9 Position 2). Hole 8 is made with a groove for fixing the latch handle from rotation.

Inside the body 1, on the side of the thread 10, there are protrusions 12, which serve as limiters for the travel of the cartridge with the drug, which is in Position 1 - preliminary.

The latch handle 3 has on one side a handle-stop 13, which follows the contour of the handle-stop 7 of the body 1, and with a hole for installing the rod 4,
and on the other side - a fastening of the type of bending hook 14, forming a snap connection.

The latch handle 3 is installed in the grooves of the housing 1, which prevent its rotation relative to the housing 1, and also serve as guides for moving the latch handle 3 inside the housing along the axis. Latch handle 3 is a limiter for the movement of the carpule.

The cap 5 on one side is made with an internal thread 15 for mating with the mating threaded part 10 of the body 1, and on the other side it has a threaded tip 16 for installing a dental needle 6 on it. The internal thread 15 is also double-start. On the outer surface of the cap 5, to limit the movement of the protective cover, a restrictive belt 17 is made, which is a circular element of increased diameter relative to the main diameter of the cap. On the restrictive belt 17, in two places on opposite sides of the cap 5, longitudinal marks 18 are applied, which are necessary for interaction with the protective cover 2. The threaded tip 15 has a hole for installing a dental needle 6 and subsequent puncture of the membrane carpules.

The protective cover 2 is made in the form of a cylindrical tube, which has visual control windows on the side surface on two opposite sides, made in the form of longitudinal through holes 19, providing unobstructed visual control of the contents of the installed carpule.

On one side, the protective cover 2 has a section - a belt with a lower diameter 20, which is fixed in an extended position on the restrictive belt 17 of the protective cap 5. The visual inspection windows 9 of the housing 1 are combined with the visual inspection windows 19 of the protective case 2 by means of a tongue-and-groove type fixation 21 On the inner surface of the protective cover 2, along the axis of symmetry, on two opposite sides there are marks 22 up to 20 mm long, which are necessary to interact with the longitudinal marks of the protective cap 5 in order to transmit rotational motion from the cover 2 to the protective cap 5.

The rod 4 is made in the form of a cylindrical rod with a tip 23 on one side and a ring 24 having a support pad 25 on the other side. The tip 23 has the shape of a cone, fits into the hole of the carpule sealing element , and serves to transmit reciprocating movement from the finger. To prevent the rod 4 from spontaneously falling out of the latch handle 3, an annular belt 26 is made on the surface of the rod on the side of the tip 23.

Figure 9 shows different positions of the injector, namely: Position 1 is the preliminary position, the latch handle is in the preliminary position, i.e. This is the position in which the injector is delivered, with the cartridge and needle installed.

Position 2 is the working position in which the carpule is punctured due to the movement of the latch handle and the drug can be administered.

The device works as follows.

The carpule injector is supplied pre-assembled, shown in Fig. 9 - Position 1.

A dental needle 6 is installed on the protective cap 5, and a carpule is installed inside the body 1 with a medicine. The spontaneous movement of which is limited by protrusions 12 made on the inner surface of the housing. The rod 4 is inserted through the latch handle 3, into the sealing rubber of the carpule, the latch handle 3 is installed in the preliminary position (Fig. 9 - Position 1), its latches are recessed into the grooves 11 of the body 1.

The user, taking the carpule injector in his hand, for example, with his thumb presses the latch handle 3, thereby transmitting the translational movement to the carpule located in the body, which in turn encounters the dental needle 6 and pierces the membrane with it. The movement occurs until the fastening 14 of the latch handle 3 is fixed into the working position (Fig.9 - Position 2) in the holes 11 of the body 1. The petals of the handle-latch 1 are combined with the petals 13 of the latch handle 3, forming a single whole.

Next, the user injects a small amount of the drug and performs an aspiration test by pulling the rod 4 by the ring 24 in the opposite direction from the carpule.

Through the visual control windows 9 on the body 1 and the windows 19 in the protective case 2, the ingress of blood into the carpule is monitored. If the blood vessel does not enter, the user injects.

At the end of the procedure, the protective cover 2 is moved to the front position until it is fixed on the cap. Next, the protective cover 2 is unscrewed together with the protective cap 5 and the dental needle 6.

The novelty of the design lies in the mechanism for puncturing the carpule membrane, which gives an obvious positive effect, namely: simplification of preparation and use due to the fact that the injector is supplied in sterile form with a needle already screwed on and a pre-installed cartridge. The user only needs to open the package and press the latch handle 3, thereby piercing the membrane of the carpule with the medicine.

Claims (10)

1. Sterile carpule injector, designed to pierce the carpule membrane, containing a body made in the form of a cylindrical part with a cavity for the carpule and visual control windows, on one side there is a handle-rest, and on the other there is an external thread on which a cap is installed with a threaded tip for installing a needle, a needle and a rod, characterized in that - inside the body there is a cartridge into which the tip of the rod is inserted, and a ring belt is made on the rod on the side of the tip, - a latch handle is additionally introduced, made with the ability to move along the axis of the body, and the shape of the latch handle repeats the shape of the stop handle, - on the body in the part of the handle-stop there are through holes that fix the position of the handle-latch in the preliminary and working positions, - wherein the puncture of the carpule membrane with a needle is carried out by moving the latch handle from the preliminary position to the working position, - a protective cover is installed on the cylindrical part of the body, which has visual inspection windows, and a belt with a reduced diameter for fixing in the extended position on the limiting belt of the cap. 2. Carpule injector according to claim 1, characterized in that the latch handle is made with a hole for positioning the rod, and the fastening to the body is carried out using bending hooks. 3. Carpule injector according to claim 1, characterized in that the latch handle is installed in the grooves of the body, which are guides for moving it inside the body along the axis. 4. Carpule injector according to claim 1, characterized in that on the inner part of the body on the thread side there are protrusions that limit the movement of the carpule. 5. Carpule injector according to claim 1, characterized in that the protective cover is fixed to the body by means of a tongue-and-groove connection.