RU204370U1 - AUTOMATIC INJECTOR - Google Patents

Abstract

The utility model relates to devices for the automatic administration of a liquid drug in the provision of emergency medical aid to victims in emergency situations, as well as self-and mutual assistance to military personnel in military field conditions. The automatic injector includes a rectangular body with rounded corners, consisting of: a central block, a distal block, a proximal block, as well as a safety clip with two posts, the body being designed to accommodate a cartridge with a needle, and the distal block includes a release button. In this case, one of the racks of the safety bracket is inserted into the holes that coincide during assembly, made in the release button and the housing of the distal block, and the other of the racks is inserted into the matching holes during assembly, made in the housing of the central block, the spring stop and the swivel washer. The technical result consists in preventing accidental operation during operation. 11 ill.

Description

The device relates to medicine and medical technology and can be used for the automatic introduction of a liquid drug in the provision of emergency medical care to victims in emergency situations, as well as self-and mutual assistance to military personnel in military field conditions.

Known automatic injector [RU 171991 U, publ. 06/23/2017], recommended for use in the provision of emergency medical care to the population and emergency care for people and animals in emergency situations for the sequential automatic injection of a needle and a liquid drug into muscle tissue, which is the closest technical solution and is adopted as a prototype device.

The prototype automatic injector includes a cylindrical body, on one side of which a cover with a hole in the center is installed, behind which a carpula with a locking-guiding device is placed inside the body with a needle towards the hole, filled with a liquid drug or prophylactic agent and sealed with a piston stopper, behind which is located cylindrical pusher with a compressed spring worn on it. On the other side, a trigger and a blocker are installed. The pusher has a spring stop, which divides the pusher into a cartridge and spring parts. The trigger mechanism consists of a cylindrical cover and a pusher lock. At the end of the pusher, protruding from the body through a hole in the trigger cover, immediately above the level of this hole, a groove is made, onto which a pusher lock is put on top, which is made in the form of a longitudinal plate with a length greater than the diameter of the blocking cap put on from above, with one end rounded corresponding to the arc of the lid, while the other end is bent at an angle of 90 °, and has a symmetrical figured cut formed by mating the hole in the form of an incomplete circle with a semicircular hole of a smaller diameter. The plate is made with the possibility of translational movement in a rectangular cutout along the bottom of the trigger cover. At the same time, in the fixed position, the pusher at the groove level is inserted into a semicircular cutout, the cylindrical blocker, put on top of the retainer plate, has a hole in the center through which a small section of the spring part of the pusher protrudes, and along the lateral side from its lower edge and almost to the top, the blocker has a cutout for the protruding part of the retainer plate, and from one upper corner of the cutout further along the circumference a slot is made into which, when the blocker is turned, the retainer plate enters when it is locked. The mechanism is started by translational movement of the retainer plate towards the axis of the body. This plate is the trigger for the prototype device. Also, in the prototype device, the fixing-guiding device is a foam ring put on the aluminum cap of the cartridge. The opening of the cover at the end of the body from the side of the cartridge is covered with a latex film.

The technical result from the use of the prototype device is to prevent the possibility of its accidental operation during operation and is achieved by the fact that the design of the prototype device uses a fixation and locking system, which excludes its involuntary operation.

At the same time, the design of the prototype device under consideration has the following disadvantages that limit its widespread use:

- when the cover of the prototype device is opened, an accidental actuation of the mechanism may occur;

- the needle with the carpula moves forward, as a result of which the medicine flows out of the needle before it is inserted into the soft tissues.

Thus, there is a need to develop new means of this purpose.

The task of the claimed utility model is to improve reliability during operation, namely, to prevent accidental operation during operation.

The technical result is achieved due to the fact that in the claimed automatic injector, including a body made with the possibility of accommodating a cartridge with a needle, and a trigger element, the trigger element is made in the form of a release button, the body is made rectangular with rounded corners and consists of a central block, a distal block , the proximal block, as well as a safety clip with two posts, while the distal block includes a release button, one of the posts of the safety clip is inserted into the holes that coincide during assembly, made in the release button and the distal block body, and the other post is inserted into the holes that coincide during assembly , made in the body of the central block, the spring stop and the swivel washer.

The figures show:

FIG. 1 - complete automatic injector.

FIG. 2 - auto injector blocks and safety clip are shown in exploded view.

FIG. 3 - distal block (details are shown in exploded view).

FIG. 4 - the inner surface of the housing 5 (one guide groove is shown).

FIG. 5 - the central block of the claimed utility model (details are shown in exploded view).

FIG. 6 - swivel washer (movable part) and spring stop (stationary part of the central block).

FIG. 7 - the central block, the pusher is shown.

FIG. 8 shows the sequence of the action of the pusher rib on the pins of the swivel washer.

FIG. 9 - central block, shows the movement of the rotary washer in the proximal direction.

FIG. 10 - assembly block of the carpule.

FIG. 11 - assembly block of the carpool (self-timer is shown).

The claimed utility model (Fig. 1) has a rectangular body with rounded corners, consisting of: a central block 1, a distal block 2, a proximal block 3 and a safety bracket 4 with two posts (Fig. 2).

Since the claimed utility model is a disposable device and its repeated "reloading" with a drug is not provided, the bodies of blocks 1 and 2, 1 and 3 are connected together by an adhesive seam. The absence of connecting threads on the bodies of blocks 1 and 2, 1 and 3 allows them to be manufactured by injection molding, while reducing the wall thickness and thereby significantly reducing the mass of the bodies of blocks 1 and 2, 1 and 3.

The proximal block 3 is represented by a housing 27 with an outlet of the needle 35, which is covered with a protective film 22. On the joining parts of the bodies of blocks 1 and 3, counter grooves are made.

The assembled distal unit consists of a housing 5 and a release button 6 (Fig. 3a, 3b, 3c).

The release button 6 has the ability to rotate around the axis by 90 °. In the extreme right position, the release button 6 cannot be lowered in the proximal direction. In the extreme left position, after turning clockwise by 90 °, the release button 6 has the ability to move down by 4 mm. By pressing the finger on the release button 6, the latter acts on the pusher 15, which starts the mechanism of the claimed utility model. Such interaction of the parts of the release button 6 and the housing 5 is ensured by the presence of two protrusions 9 on the release button 6 (Fig. 3a) and two guide grooves 10 on the inner surface of the housing 5 (Fig. 4).

A hole 7 is made in the body 5, which, during the initial assembly, coincides with the hole 8 made in the release button 6 (Fig. 3a). During assembly, the distal post of the safety clip 4 is inserted into the indicated holes 7 and 8, thereby blocking the rotation of the release button 6, as a result of which the mechanism of the claimed utility model cannot be started (the first protection mechanism against accidental release).

In the lower part of the body 5 there are four protrusions 11 (Fig. 3a, 3b), which provide connection with the body 12 of the central block 1. The said protrusions 11 during assembly are located in the rounded corners of the body 12 of the central block 1 and provide an unambiguous assembly of these parts. The specified parts are connected with a glue seam.

The central block 1 (Fig.5a, 56, 5c, 5d, 5e, 5e) includes a housing 12, an assembly block of a cartridge 13, a spring 14, a pusher 15, a stop 16 of the spring 14, fixedly attached to the housing 12 and a swivel washer 17, providing not only translational, but also rotational movement.

Inside the upper part of the body of the central block 1, there is an inflow of material 18 (Fig. 5d, 5e), providing the distal stop of the spring 14 (Fig. 56, 5c). In addition, slots 19 (Fig. 5d, 5e) are made in the mentioned bead of material 18 for installing the pusher 15.

The other end of the spring 14 abuts against the swivel washer 17, which has three pins 20 (Fig. 6c). When placing the swivel washer 17 in the stop 16 (Fig. 6a) and when turning the swivel washer 17 by 5 °, the pins 20 fall into the grooves 21 of the stop 16 (Fig. 66). Three pins 20 correspond to three slots 21. As long as the swivel washer 17 is rotated and the pins 20 are in the slots 21, there will be no translational movement of the swivel washer 17. When the pivot washer 17 is rotated, the pins 20 are disengaged with the slots 21 and the pivot washer 17, under the influence of the spring 14, translates forward. The stop 16 is fixedly fixed in the proximal part of the housing 12 of the block 1.

When assembling, the hole 23 in the spring stop 16 (Fig.6a, 66), the hole 24 in the swivel washer 17 and the hole 25 (Fig.5e) of the housing 12 of the central block 1 coincide and the proximal post of the safety bracket 4 is inserted into them, thereby blocking the rotation swivel washer 17 (second safety mechanism against accidental release).

To ensure the start of the mechanism of the claimed utility model, it is necessary to transfer the initial impact from the operator's finger to the swivel washer 17 (turn it by 5 °). For this, the design of the claimed utility model provides a pusher 15, which is located in the housing 12 of the central block 1 (Fig. 56, 5c).

The distance from the pusher 15 to the housing 12 is 4 mm (Fig. 7). When you press the release button 6 with your finger in the proximal direction, the release button 6 presses on the pusher 15, which with the wedge-shaped part of its rib 26 acts on the pins 20 of the swivel washer 17, the swivel washer 17 rotates and disengages the pins 20 from engagement with the grooves 21 of the stop 16 of the spring 14 ( the sequence of movement is shown in Fig. 8a, 86, 8c, 8d).

Under the influence of the spring 14, the swivel washer 17 will move until it stops in the inner cavity of the housing 27 of the proximal block 3. In turn, the swivel washer 17 has a mechanical connection with the assembly block of the cartridge 13 (Fig. 9), and, therefore, moving forward will pull along assembly block of the cartridge 13. This forward movement will use the energy of the spring 14 to pierce the victim's skin, clothing, etc., until the needle 35 of the cartridge 33 plunges into the victim's body to the maximum possible depth (20 mm without clothing, 15 mm through clothing ). Under the influence of the spring 14, the movable parts of the mechanism of the claimed utility model carry out the "first" movement of the two provided, ensuring the immersion of the needle tip 35 into the victim's body to the required depth.

It should be noted that the pusher 15, having fulfilled its function, namely by starting the mechanism of the claimed utility model, is completely pressed against the plane of the body 12. The swivel washer 17, connected with the assembly block of the carpula 13, moving to the extreme forward position and not reaching it 3 mm (Fig. 9), the self-timer 30, or rather the protrusions of the self-timer 34 rests against the edges of the pusher 15.

The assembly block of the cartridge 13 (Fig. 10) has a housing 28, a piston of a cartridge 29, a self-timer 30, a spring 31 of a cartridge 33, a stopper 32, a glass cartridge 33 with a pre-filled drug and a plunger 36 and a needle 35.

The spring of the cartridge 31 in a compressed state is located in the housing 28 between the piston disc 29 and the stop in the inner cavity of the housing 28. The self-timer 30 rests against the stops of the piston 29 and does not allow it to move forward. Self-timer 30 has protrusions 34 for the diameter of the body 28 of the cartridge. At the moment when the spring 14 acts on the swivel washer 17 and moves forward the assembly block of the cartridge 13, the self-timer 30 with its protrusions 34 abuts against the plane of the pusher 15 (Fig. 11).

The force of the spring 14 is sufficient to pierce the victim's skin with the needle 35 and to further advance the carpula forward (Fig. 11, shown by the arrow in the proximal direction), as well as to break the self-timer 30 (Fig. 11, shown by the arrows in the distal direction). After breaking the self-timer 30, the piston 29 of the cartridge 33 is released and, using the energy of the spring 31 of the cartridge 33, the mechanisms of the claimed utility model produce a "second" movement. The piston 29 of the cartridge, moving forward, in the proximal direction acts on the plunger 36 of the cartridge 33, thereby squeezing the drug into the needle 35.

From all that has been said, it follows that practically after the end of the delivery of the needle tip 35 to the required depth in the skin of the victim, the piston 29 of the cartridge is switched on in the work, namely, ensuring the delivery of the drug to the desired place.

The use of the claimed utility model does not require special skills. To provide self-help or mutual assistance, it is necessary to remove the safety bracket 4, press the proximal block 3 with a closed film 22 with the opening of the housing 27 (Fig. 2) of the claimed utility model to the body and press the release button 6, after which the above-described mechanism of the device will work and the needle 35 will pierce the protective film 22, will enter the victim's skin and the drug will be injected.

Claims (1)

Automatic injector, including a body made with the possibility of accommodating a cartridge with a needle, a trigger element, characterized in that the trigger element is made in the form of a release button, the body is made rectangular with rounded corners and consists of a central block, a distal block, a proximal block, and a safety brackets with two posts, and the distal block includes a release button, while one of the posts of the safety bracket is inserted into the holes that coincide during assembly, made in the release button and the housing of the distal block, and the other of the posts is inserted into the holes that coincide during assembly, made in the body of the central block, spring stop and swivel washer.

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