RU192792U1 - TWO-CIRCULAR AUTOMATIC INJECTOR - Google Patents

Abstract

The utility model relates to medical equipment, medicine and veterinary medicine. More specifically, the utility model provides a device for the sequential automatic injection of a needle and a liquid drug into muscle tissue and can be used in emergency medical assistance to the population and emergency assistance to people and animals in emergency situations, as well as self and mutual assistance to military personnel in the military The technical result is to enable simultaneous or sequential administration of two drugs or two doses of one drug. The specified technical result is achieved by the fact that in the inventive automatic injector a new trigger is used.

Description

The technical field to which the utility model relates.

The utility model relates to medical equipment, medicine and veterinary medicine. More specifically, the utility model provides a device for the simultaneous or sequential automatic injection of two doses of a liquid drug into muscle tissue and can be used in emergency medical care for the population and emergency assistance to people and animals in emergency situations, as well as for self-help and mutual aid to military personnel field conditions, including for the rapid introduction of antidotes in the case of the use of chemical weapons.

State of the art

Currently, there is a growing demand for car injectors. The use of automatic injectors overcomes psychological discomfort due to the fact that the needle is hidden from the user inside the case. In addition, the procedure for performing an injection using an auto-injector does not require skills and can be performed with one hand.

Most injection devices on the market are designed to administer a single dose of one drug. However, the simultaneous or sequential administration of two doses of one drug, or the introduction of a combination of drugs is often required.

RU 2417108 C1 discloses a syringe containing a cylinder with a cap on one end thereof and an elastic membrane on the other end, a rod with a piston having a tip for mounting a hollow needle nozzle on it, the nozzle having a side hole and the needle located in the cylinder, characterized the fact that it includes at least one additional cylinder, and the cylinders are combined in a block, have the same / different diameters, a common cover and a common membrane, and the rods are interconnected. The principle of use of the described syringe is as follows: The syringe in the form of a block with cylinders is removed from the package. A hairpin threaded through holes in the rods is removed (pulled out). Disinfect the patient’s skin area and press the membrane against it. Then, by pressing the pad, the rods with pistons are set in motion. When moving the rods through the holes in the cap of the tip of the needles put on nozzles on the tips of the pistons, pierce the membrane. In this case, the preparations in the cylinders through the lateral openings in the nozzles and the cavity of the needles enter the patient's body.

The disadvantages of the described syringe are the inability to sequentially administer the drugs, the insufficiently rapid administration of the drugs, and the inability to use the device in emergency or military conditions, where an injection through clothes may be required.

Thus, there is a need to develop new tools for this purpose.

Disclosure of the essence of the utility model.

The objective of the claimed utility model is to create a safe automatic device for injection with the possibility of simultaneous or sequential administration of two drugs or two doses of one drug.

The technical result consists in providing the possibility of simultaneous or sequential administration of two drugs or two doses of one drug.

The specified technical result is achieved by the fact that in the inventive automatic injector a new trigger is used.

As an inventive utility model, an automatic injector is proposed comprising a housing having an end part on one side, behind which two capsules are placed in the channels inside the housing with the needle toward the end part, filled with liquid drug or prophylactic and sealed with a piston plug, each of which there is a cylindrical pusher with a compressed spring on it, and on the other hand a trigger is installed, while the trigger mechanism consists of a trigger housing and is fixedly and the pushers, the trigger housing has inside the channels in which the spring parts of the pushers are located, in the upper part of the trigger mechanism in a plane perpendicular to the axis of the autoinjector, a cylindrical hole is made with a diameter equal to the center distance between the channels of the housing, the pusher lock is a cylinder commensurate with hole in the trigger housing, and on the one hand has a L-shaped protrusion, on the cylindrical part of the latch in line with the L-shaped protrusion, made at least one semicircular groove, and on the spring part of the pushers there are samples commensurate with the diameter of the hole in the trigger housing.

Brief Description of the Drawings

In FIG. 1 shows a General view in section.

In FIG. 2 shows the trigger housing.

In FIG. 3 presents the pusher latch.

In FIG. 4 shows a cover-lock.

In FIG. 5 is a pusher.

Utility Model Implementation

Next, the utility model will be described in detail with reference to the figures of the drawings.

The inventive automatic injector is a collapsible device and contains (Fig. 1) housed in the housing 101 of the cylindrical pushers 102 with springs 103 and capsules 104 mounted thereon.

The body of the autoinjector 101 is made of metal or plastic, preferably carbon fiber. Inside the housing there are two cylindrical channels 113, made coaxially with the central axis of the autoinjector, with a narrowing in the end part. For free movement inside the housing, the springs 103 have an outer diameter slightly less than the diameter of the channels of the housing 113.

The trigger mechanism of the auto-injector consists of the trigger mechanism 105, the pusher latch 106 and the cover-lock 107. The trigger mechanism 105 (Fig. 2) is made of plastic and has two through cylindrical channels 201 inside, which can be aligned with the channels in the auto-injector case. The trigger housing is connected to the auto-injector housing via a pin connection 108. The inner diameter of the channels 201 of the trigger housing has a size that allows the pushers 102 with free springs 103 mounted on them to move inside the housing.

In the upper part of the trigger housing 201, in a plane perpendicular to the axis of the autoinjector, a cylindrical hole 202 is made with a diameter equal to the center distance between the channels of the housing.

The pusher latch 106 is made of plastic and is a cylinder 301, commensurate with the hole 202 in the trigger housing (Fig. 3). On the one hand, the latch has a L-shaped protrusion 302. On the cylindrical part of the latch 301, at least one semicircular groove 303 is made in line with the L-shaped protrusion 303. The depth of the groove has a size exceeding the radius of the spring part of the pushers, which allows to move the pusher when unlocking. The number of grooves is determined by the required regimen of drug administration. If sequential administration of the contents of the carpules is necessary, one groove is performed. If simultaneous administration is required, two grooves are performed.

On top of the trigger mechanism is put on a cover-lock 107 made of an elastic material, such as rubber (Fig. 4). In the upper part of the cover-lock there is a rectangular hole 401, made with the possibility of holding the upper part of the L-shaped protrusion 302 of the latch in order to avoid accidental triggering of the trigger mechanism. For ease of removal, recesses 402 may be provided on both sides of the top of the cover-lock.

The pusher (Fig. 5) is made of plastic, preferably polyoxymethylene. On the pusher, a spring limiter 501 is arranged in the form of a barrier ring having a diameter slightly less than the inner diameter of the capsule 104. The limiter divides the pusher into the spring 502 and spring 503 parts. The spring 103 is located on the spring portion 503 of the pusher. At the top of the pushers there are samples 504 commensurate with the diameter of the pusher lock.

The spring stiffness, necessary and sufficient for the use of an automatic injector in specific conditions (for example, in a self-help kit for an employee of law enforcement agencies, when vaccinating civilians, in veterinary medicine of pets or cattle, etc.), is selected empirically by choosing the material , the method of its processing and the diameter of the turns of the spring.

Karpula 104 (Fig. 1) is a glass cylindrical container for a drug or prophylactic drug of the required capacity, onto which an aluminum cap 109 with a PO needle previously fixed in it is installed by the rolling method. The needle of the capsule is protected by a rubber cover 111, dressed on an aluminum cap 109. The cartridge is equipped with a plug-piston 112, which is installed after filling the capsule with a drug.

The inventive automatic injector is collected and brought into operation as follows. The pusher latch 106 is installed in the automatic injector body in the actuation position, the pushers 102 with the springs 103 installed on them are placed in the corresponding channels 201 in the trigger housing, the springs are compressed and, as the samples 504 on the pushers and the cylindrical part of the pusher latch coincide, the latch is translated into vertical fixation position. Then, the capsules 104 with the drug are attached to the karpulny parts 502 of the pushers. The trigger thus assembled is mounted on the casing 101 of the two-nozzle autoinjector and secured with studs 108. Put on the trigger mechanism the lock-block 107. The two-nozzle automatic injector is ready for use.

The injection using the inventive automatic injector is as follows. An automatic injector is pressed against the injection site. The cover-lock 107 is removed from the opposite end and, using the L-shaped protrusion 302, the pusher latch 106 is rotated 90 degrees from the initial vertical position. When moving the pusher latch 106, depending on the number of grooves, the springs 103 are released either one (if there is one groove) or two at once (if there are two grooves). The pusher 102, under the action of the spring 103, begins to move towards the capsule 104, presses on the plug-piston 112, which leads to the movement of the cartridge 104 in the channel 113 of the housing until it stops at the end. The PO needle leaves the body through the hole, penetrates the muscle tissue, and the drug is poured out. In the embodiment of the automatic injector with one groove 303 on the pusher retainer 106, sequential introduction of the contents of the capsules provides by alternately rotating the retainer 106 90 degrees from the initial vertical position, first in one direction and then in the opposite direction.

The inventive automatic injector has the following advantages. It is compact and easy to manufacture, the manufacture of most components does not require complex, high-precision equipment. The design of the inventive automatic injector provides the possibility of simultaneous or sequential administration of two drugs or two doses of one drug.

The tests carried out allowed us to experimentally establish that the inventive automatic injector can be used to inject liquid drugs of various viscosities into muscle tissue directly or through clothing made of materials of different densities.

During the tests, the inventive automatic injector carried out model injections into an analogue of muscle tissue (silicone) through 16 layers of cotton tissue, through 6 layers of 2 mm porous cardboard, through 1.5 mm of genuine leather, while the needles did not deform, and the contents of the capsules poured in the required volume.

Thus, the inventive automatic injector can be used in medicine, both civilian and military, as well as in veterinary medicine, for example during preventive-vaccination activities of the civilian population, to provide the necessary drugs to individual first-aid kits of power structures, in field and hospital hospitals of disaster medicine, as well as in the prevention and treatment of animal diseases, and its use can accelerate the provision of medical care.

Claims (3)

1. An automatic injector comprising a housing having, on one side, an end portion, behind which two capsules are placed in the channels inside the housing with the needle toward the end portion, filled with liquid drug or prophylactic and sealed with a piston plug, behind each of which there is a cylindrical pusher with put on it by a compressed spring, and on the other hand, a trigger is installed, while the trigger consists of a trigger housing and pusher lock, the trigger housing has in the morning the channels in which the spring parts of the pushers are located, in the upper part of the trigger housing in a plane perpendicular to the axis of the autoinjector, a cylindrical hole is made with a diameter equal to the center distance between the channels of the housing, the pusher lock is a cylinder commensurate with the hole in the trigger mechanism, and on the one hand has a L-shaped protrusion, at least one semicircular groove is made on the cylindrical part of the latch in line with the L-shaped protrusion, and on the spring of the pusher part there are samples commensurate with the diameter of the hole in the trigger housing. 2. The automatic injector according to claim 1, in which one semicircular groove is made on the cylindrical part of the retainer. 3. The automatic injector according to claim 1, wherein two semicircular grooves are made on the cylindrical part of the retainer.

Images