RU2692975C1 - Automatic injector for intramuscular and subcutaneous injections for medical syringes - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: device relates to medical equipment, namely to devices for intramuscular and subcutaneous injection. Automatic injector for intramuscular and subcutaneous injections for medical syringes consists of a body, a syringe holder, a syringe lift retainer, a piston pusher, a rack, piston pusher lock, release button, syringe lift, lifting spring, needle insertion spring, extrusion spring, dynamic brake in the form of damper mechanism, damping lubricant. When preparing the automatic injector for injection, the piston pusher with gear rack interacts with the lift retainer and the pusher retainer to move to the extreme position until fixation, which leads to extension of the extrusion spring, after which the syringe lift moves to the opposite position, which leads to the needle insertion spring and the lifting spring extension, wherein syringe elevator is shifted to extreme position with intramuscular injection or middle position located between initial and extreme, with subcutaneous injection, then a pre-prepared syringe is inserted into the syringe holder, when injecting, the injector is pressed to the injection site, thereby pressing the safety device, wherein the fuse displacement ensures the free hand pressing of the person, wherein the push of the button disengages the pusher retainer with the body and under the needle input spring, the syringe cartridge holder moves towards the injection point together with the syringe installed in the syringe holder cartridge, wherein parts are moved: an injection liquid extruder pusher, a ratchet gear, a damper disk, a ratchet wheel axis, a damper cover, a damper lubricant and wherein the movement takes place until the syringe cartridge holder rests against the elevator, thus, the needle is inserted to the required depth and under the action of the extrusion springs, the piston pusher moves to the cartridge holder, thereby moving the syringe piston and squeezing the liquid for injection, at that, slow movement of piston pusher is provided by engagement of rack of pusher, ratchet gear, slack wheel axis, damping disk and due to rotation of damping disk in damping lubricant medium provides smooth, slow extrusion of liquid from syringe, unobstructed cocking of the pusher is provided by a ratchet on the ratchet gear, and when the pusher reaches the cartridge holder and the liquid from the syringe is squeezed, the lift retainer is lifted and under the action of the lifting spring the needle is brought to the opposite position, wherein movement of the elevator leads to extension of the needle input spring and the lifting spring, and if the subcutaneous injection, the lift is moved to the middle position between the initial and the extreme, and the cartridge is equipped with a pre-prepared syringe for injection and the whole device is ready for injection, injector is pressed to the injection point and thus the safety lock is pressed, the fuse displacement ensures the free pressing of the button by the human hand, wherein pressing the button disengages the pusher retainer with the body and under the needle input spring, the syringe cartridge holder moves towards the injection point together with the syringe installed in the syringe holder, also moving parts: pusher, springs of injection liquid injection, ratchet gear, damping disk, ratchet, damper cover, damping lubricant and movement is carried out until the syringe cartridge holder rests against the lift, thus, the needle is inserted to the required depth and under the action of the extrusion springs, the piston pusher moves to the cartridge holder, thereby moving the syringe piston and squeezing the liquid for injection, at that, slow movement of piston pusher is provided by engagement of rack of piston pusher, ratchet gear, slack wheel axis, damping disk and due to rotation of damping disk in damping lubricant medium provides smooth slow liquid extrusion from syringe, as well as unobstructed cocking of pusher is provided by ratchet on ratchet gear, and when pusher reaches cartridge holder, then liquid from syringe is squeezed, lifting lift retainer and under action of lifting spring all moves to initial working position and needle is withdrawn.

EFFECT: disclosed is an automatic injector for intramuscular and subcutaneous injections for medical syringes.

1 cl, 4 dwg

Description

The device relates to medical equipment, namely, devices for intramuscular and subcutaneous injections.

The purpose of the invention allows you to make yourself injections of medicine with a conventional medical syringe, and the ability to inject a poorly qualified person, reducing pain during injection.

A known device: Patent number 2649504. Automatic injector for standard medical syringes. Application: 2016121730, 10.10.2016. IPC A61M 5/20 (2006.01)

Automatic injector for standard medical syringes, consisting of a body, springs, a syringe holder, characterized in that the platoon plate interacts downwards until the syringe latch locks into place under the influence of the physical force of a human hand, and the piston pusher clicks down made with the possibility of a platoon, in accordance with the degree of filling of the syringe, rising to the height of the piston rod of the syringe, moreover, the piston pusher is made with the possibility of platoon in accordance With a degree of filling of the syringe, rising to the height of the piston rod of the syringe, the toothed rack and the piston pusher lock fix the piston pusher at different heights, while the syringe holder is inserted into the syringe holder, and the syringe holder can be released by the trigger button, while through the main spring interacting with the syringe holder, the syringe needle is inserted at the desired depth into the patient's body, followed by the syringe holder, gear ka, piston pusher, piston pusher retainer descend to the extreme lower position in the casing, while the piston pusher latch has the ability to be disengaged from the toothed rack of the syringe elevator bar, thereby providing the possibility of moving down the toothed rack and the piston pusher, which makes it possible to squeeze out syringe injection fluid, and after reaching the toothed rack of the clamp of the syringe lift has the ability to free themselves and under the influence of the lifting spring to raise the syringe and withdraw the needle at the injection site, in this case, the syringe holder, the plunger pusher, the syringe lift is set to longitudinal movement by the guide body, (prototype)

The disadvantage is the rough operation of the device, the very rapid introduction of the drug and the slow recovery of the device to its original working condition.

Known device "AUTOMATIC INJECTOR". Patent number 2571231. Application: 2013120978/14, 10/06/2011. IPC A61M 5/20 (2006.01).

The invention relates to medical equipment, in particular to automatic injectors for administering a dose of a liquid drug. The injector contains: a tubular frame, a supporting subassembly, overlapping the initiator cuff, a regulating spring, four locking means. Moreover, the carrier subassembly includes a tubular carrier mounted slidably relative to the framework and partially located inside the framework, the carrier comprising a syringe with a hollow injection needle, a drive spring and a piston in order to direct the load of the drive spring to the stopper of the syringe, where the syringe it is fixed with the bearing element for joint axial movement. Moreover, the overlapping cuff initiator is located over the distal end of the automatic injector and passes at least along the entire length of the automatic injector. The control spring is located around the support element. The first locking means connects the proximal end of the regulating spring either with the supporting element to advance it for the purpose of inserting the needle, or with the frame for withdrawing the needle, depending on the relative axial position of the supporting element and the initiator cuff. The second blocking means allows the drive spring to be released for injection when the carrier has almost reached the injection depth during insertion of the needle. The third locking means allows the carcass to be connected to the carrier for axial movement together relative to the initiator cuff, while the third locking means allows the carcass and the carrier to be separated when the initiating cuff is moved in the proximal direction relative to the carcass, thus releasing the control spring for insertion needles. The fourth locking means allows the distal end of the regulating spring to be connected to either the support element for the needle retraction, or, otherwise, to the initiator cuff. The use of the invention provides the possibility of introducing drugs of different viscosity, including high viscosity, and different volumes; prevent drug leakage from the needle; the ability to use an autoinjector for people with physical dexterity problems.

The disadvantage is the great complexity of the design, and difficulty in use.

The technical result is the ability to make injections of untrained special medical knowledge by a person, to reduce the painful sensations from a quick injection of the drug during the injection, and allows you to make injections yourself yourself, and quickly bring the injector into working condition.

The technical result is achieved by the fact that the main spring is made of two springs, namely, a needle insertion spring and an extrusion spring, and this ensures a smoother, more stable operation of the device, as well as a dynamic brake in the form of a damper mechanism, namely, a ratchet damper disk with damping lubricant, and also provides slow injection of medication from a standard disposable syringe and easy quick arming of the device into working condition, with the toothed rack, when moving under the action of springs, in the direction of d rzhatelya cartridge, which engages with the pinion through a ratchet transmits rotation to the ratchet wheel. which is transmitted through the axis to the damper disk located in the damper lubricant, in the housing, as well as from the cartridge of the syringe holder, the syringe cartridge, the piston pusher with the toothed rack, the elevator lock and the pushrod clamp, the fuse, the syringe elevator, the needle spring, the lifting spring , release buttons, extrusion spring of injection fluid, gear - ratchet, damper disk, ratchet axis, damper cover, damper lubricant, in preparing the device for performing intramuscular injection, piston pusher gear rack, by interacting with the latch lock and the pusher latch move to the extreme position until it clicks, it causes the extrusion springs to stretch, and then the lift move to the extreme opposite position, which corresponds to two clicks, while the lift moves the needle spring to stretch and the lifting spring, and if the injection is subcutaneous, the lift moves to the first click, and the syringe prepared for the injection is set in the cartridge, and the whole device is ready the injector presses against the injection site and, thus, the fuse is pressed, the fuse is moved, and the fuse displacement ensures that the button is freely pressed by the person’s hand, and the push button disengages the push rod lock with the body, and under the action of the needle spring of the syringe cartridge holder moves in the direction of the injection site along with the syringe installed in the cartridge of the syringe holder, the details also move: - pusher, extrusion springs for injection fluid, ratchet gear, damper the lawsuit, the ratchet axis, the damper lid, the damper lubricant, and at the same time, the movement takes place until the holder of the syringe cartridge rests on the lift, thus the needle is inserted to the required depth, and under the action of the extrusion springs the piston pusher moves to the cartridge holder, thereby moving the syringe piston and squeezing out the injection liquid, while the slow movement of the piston pusher is ensured by the engagement of the toothed rack of the piston pusher, ratchet pinion, ratchet axis, damper disk, and due to the rotation Damping a disk in a damping lubricant ensures smooth, slow squeezing of the liquid from the syringe, and also, smoothly raising the pusher is ensured by a ratchet on the ratchet gear, and when the pusher reaches the cartridge holder, the liquid from the syringe is squeezed out, the elevator lock is lifted and under the action of the lifting spring everything moves to its original position and needle withdrawal occurs.

FIG. Figure 1 shows a partial section of an “Automatic Injector for Intramuscular and Subcutaneous Injections for Medical Syringes”.

FIG. 2 shows an additional partial section of the “Automatic Injector for Intramuscular and Subcutaneous Injections for Medical Syringes”.

FIG. 3 shows an additional partial section of the “Automatic Injector for Intramuscular and Subcutaneous Injections for Medical Syringes”

FIG. 4 shows an additional partial section of the “Automatic Injector for Intramuscular and Subcutaneous Injections for Medical Syringes”.

Device and work.

An intramuscular and subcutaneous automatic injector for medical syringes shown in FIG. 1, FIG. 2, FIG. H, FIG. 4 completed and works in the following order: -

1. Remove the transparent cover (not shown in the drawings).

2. The pusher (5) is cocked. The free plunger of the pusher (5) is provided by disconnecting the dynamic brake in the form of a damping device (23) through the ratchet wheel (21) located on the axis of the ratchet (12), consisting of gear (19) and ratchet (20). Gear (19) interacts with the toothed rack (22).

3. The extrusion springs (11) are stretched, 2 of them.

4. The elevator (7) is cocked, the lifting spring (9) and the needle insertion spring (8) are stretched

5. When the pusher is cocked (5), it becomes on the pusher retainer (17).

6. When the elevator is raised (7), it becomes on the elevator detent (18).

7. Install the syringe (1) ready for injection into the cartridge (3), on the cartridge holder (4).

8. The safety device (6), resting against the patient's body, moves and releases the pressing of the button (10).

9. Pressing the button (10) releases the lock (17) from engagement with the body (2).

10. The input spring (8) moves: - the pusher (5), the extrusion springs (11), the cartridge holder (4), the syringe holder cartridge (3) and the entire damper mechanism (23).

11. Moving occurs until the holder (4) stops in the lift (7).

12. The needle of the syringe (1) is inserted to the desired depth in the patient's body.

13. After that, due to the damper mechanism (23), the drug is introduced at a slow speed due to the resistance of the damper lubricant (16) on the damper disk (13). This is due to the interaction of the rack (22), which interacts with the ratchet gear (12) through the ratchet axis (14) and the damper disk (13), which is closed by the damper cover (15).

14. At the end of the extrusion of the injection liquid from the syringe (1), the retainer (18) is lifted and disengaged from the housing (2). This frees up the lift (7), which, under the action of the lifting spring (9), pulls the needle out of the patient's body.

15. From incorrect charging of the device to the working position there is a holder for the cartridge holder (24).

A prototype was made, showing excellent results, and was much easier to use than the prototype. The sample is made for sterilization of a hygienically approved plastic material resistant to antiseptic solutions, metal parts are stainless steel.

The list of positions.

1. standard disposable syringe

2. case

3. cartridge holder syringe

4. syringe cartridge holder

5. pusher

6. fuse

7. syringe lift

8. needle insertion spring

9. lifting spring

10. release button

11. spring extrusion injection fluid

12. gear - ratchet

13. damper disk

14. ratchet axis

15. damper cover

16. damping grease

17. pusher lock

18. retainer

19. gear

20. ratchet

21. ratchet wheel

22. toothed rack

23. damping mechanism

24. cartridge holder retainer

Claims (1)

Automatic injector for intramuscular and subcutaneous injections for medical syringes, consisting of a body, a syringe holder, a syringe lifter latch, a piston pusher, a toothed rack, a piston pusher latch, a trigger button, a syringe lifter, a lifting spring, a needle spring, an extrusion spring, a dynamic brake in the form of a damping mechanism, damping lubricant, in preparation of an automatic injector to perform an injection, a piston pusher with a gear rack through interaction with the elevator lock and the pusher lock moves to the extreme position before fixation, which leads to stretching the extrusion spring, after which the syringe lift moves to the opposite position, which leads to stretching of the needle insertion spring and the lifting spring, while the syringe lift moves to the extreme position during intramuscular injection or average the position between the initial and the extreme, with a subcutaneous injection, then a pre-prepared syringe is installed in the syringe holder, the injector is pressed when the injection is performed I to the injection site, thereby pressing the fuse, while shifting the fuse provides free pressure by the person’s hand, and pressing the button disengages the pusher latch with the body and under the action of the needle spring, the syringe cartridge holder moves towards the injection site along with the syringe installed in the cartridge of the syringe holder, while moving parts: the pusher of the spring for extruding the injection fluid, the ratchet gear, the damper disk, the ratchet axis, the damper cover, the damper lubricant and the movement takes place until the holder of the syringe cartridge rests on the lift, thus the needle is inserted to the required depth and under the action of the extrusion springs the piston pusher moves to the cartridge holder, thereby moving the syringe piston and squeezing out the injection liquid This slow movement of the piston pusher is ensured by the engagement of the toothed rack of the pusher, the gear-ratchet, the ratchet axis, the damper disk and, due to the rotation of the damper disk in the environment of the damper lubricant Smooth, slow squeezing of liquid from the syringe is achieved, unobstructed cocking of the pusher is ensured by a ratchet on the gear-ratchet, and when the pusher reaches the cartridge holder and the liquid is squeezed out of the syringe, the elevator retainer rises and under the action of the lifting spring the needle withdraws.

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