SU1135426A3 - Needleless injector - Google Patents

Abstract

1. A PEOPLE INJECTOR, comprising a case in which an ejector-out element is located, an ejection chamber located in the front of the case, one of the walls of which is formed by an ejector element} 1, an intermediate chamber, channels for communicating the drug reservoir with the ejection chamber and the intermediate chamber, means for blocking channels and providing in the ejection chamber a pressure whiter than the pressure in the intermediate chamber, a nest for placing a medicine tank in it, a device for driving an ejector element containing a spring-loaded piston, a device for supplying the working fluid, including a liquid chamber, a pump and a pipe, means for keeping the spring in a compressed position, a device for releasing the spring, containing a lever, characterized in that in order to improve the metering accuracy of the injectable medication. it is provided with a valve, which is in the form of a sleeve, a part of the ejector element is placed inside it, while the end walls of the sleeve have stops to limit the movement of the rod. and to close the canal. pa between the intermediate and ejection chambers. 2. The injector according to claim 1, with the fact that the pushing element is formed in three parts, with the middle part of the pushing element formed by two truncated cones interconnected by large bases, and the back the sleeve wall has a bevel for contacting the generator of one of the cones. O) 3. The injector according to claim 1, characterized in that it is provided with an additional valve made in the form of a sleeve, one of the parts of the extraction element is placed inside it, while the end walls of the sleeve of the additional valve have a bevel for contacting the middle part generatrix of one of the cones made 4 to the nod of the whole element. 4. The injector according to Claim 1, characterized in that the device for holding the spring in the compressed position contains a valve that interacts with the lever of the device for the Ov freedom of the spring. 5. Pop-up Injector 1 is also distinguished by the fact that the spring-loaded piston rod has at least one mark to control the position of the spring-loaded piston and is equipped with a nut for adjusting the volume of a liquid.

Description

eleven

The invention relates to medicine, in particular, devices for administering drugs (drugs, more precisely, needle-free injectors.

A dispenserless backfill is known, containing a reservoir for a drug, an ejection chamber, the front wall of which has nozzle channels, a communication reservoir for the remedy and an ejection chamber, a spring-loaded piston and means for setting the piston in motion | 1J

The device has a complex construction of sig, it is difficult to stercize it, especially those parts that come into contact with the medicine,

A bezel is a grave injectory, a corpus with a corpus, inside which there is a po: s; ei; en) fast-track ajier-seirr, found in the front of the enclosure, a grgry chamber, one of the walls / mountain is formed; ; c; rroM ,, gc intermediate; camera, KAM.Pl for communication of the reservoir with the drug to the ejuz p-yunnoy and intermediate chambers, means for re:; Srggnl ivanajioB and provide in the ezhei-iijiOciHou chamber pressure 1, more than 1H of which. What is the pressure in the intermediate section, the nest for the liquor of the reservoir with the medicinal product, the device: u1: held in the movement of the extractor; ..; ion; eiо element, contains; its height ;: П П У Ёй piston, device) for ;; ode - 1and working fluid, containing 1; (its fluid chamber, pump and pipe, means for keeping the spring in place with a positive position and adjusting the l spring release, containing; ee lever t 2.

In the known device, the accuracy of the injected dose is not ensured, because the transportation of the drug r cannot be quickly realized: From the ejection chamber of the ejection chamber through narrow channels. -In addition, the formation of 101SH1es in the medication puffed out the odor and the accuracy of the dosage;

The goal of the invention is noBbiJueHiie to translate the dosage of the medication being administered.

In order to achieve the set delhi, the Zezygolny injector containing a vopiiyc, whose arm is located is a test piece located in the front part of the housing, there is a fire chamber, one of which walls

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formed by an ejecting element, an interstitial chamber, 1 canals for communicating the reservoir with the drug from the e-sheeter chamber 5, the middle channel and providing channels in the junction; and the pressure J more boeter 1pp-1zky. than the pressure in the intermediate chamber, 1 point for dummies in liero reservoir 10 ara c. Medicine device for

Blowing in a double ejector pusher containing a spring-loaded piston, a device for supplying a working fluid containing a fluid S5 chamber, a pump and a pipe, means;: 1 holding in a compressed position., fixture g: releasing G11Guin 5 containing rj-iar, fitted with a valve , filled in the form of 20 tulkki5 part of the vyggapkivayuschego ele; .ent Io is erect within it, while the bargaining system and; e from the stops I, restrict the movement of the current and for closing the channel between 111) intermediate 5 and eking; ionic chambers.

The b) talking element can be formed in three parts, with the middle part of the extinguishing element formed in two truncations; cones, United honey:

with the bases, and the back of the cTeiHca bushing has a bevel of contact gel 1- with: forming the action of one of the cones.

Niector it is advisable to provide

an additional valve, made in the form of a sleeve, is one of the parts): the willow element is placed inside it, with the torus p of the wall of the IGF of the additional valve and the slant for contacting with the middle part of one of the cones of the pushing element.

A device for holding 5 prussins in compressed state can

contain valves interacting with the lever of the device for releasing the prusins.

On iiiioice of the strung piston Q, it is advisable to carry out at least one tag to control the position of the underside of the norin, the stem can be equipped with a nut to adjust the volume of the chambers 1–1 of the internal chambers)).

FIG. 1 shows the ICH;, vector, common sup ,; in fig. 2 - the same, without drive; on (lb. 3 - option

. 3

execution of the injector, general view; in fig. 4 - the same, without a drive.

The injector comprises a housing 1, a handle 2, a sleeve 3, a nut 4, fiaBHHqeH on the housing 1, in the injector there is a socket 5 with a tripod 6 where the medication reservoir (not shown) is inserted. A needle 7 is fixed in the middle of the nest to pierce the cork of the reservoir, inside sleeve 3 is placed sleeve 8 and part 9, and element 10 is located behind sleeve 3. The injector has sleeve 11, inside which inside the sleeve 8 is an ejector element formed in three parts: one part 12 is installed in sleeve 8, the middle part is formed by two truncated cones 13 and 14 and the front part 15 is placed in sleeve 11. Between sleeves 3 and 8, a slit 16 is formed, which is connected to the medication reservoir by channels 17 and 18; An annular gap 19 is formed between the sleeve 8 and the stem 12, communicating with the gap 16 by means of radial channels 20. The sleeve 8 has a bevel 21 serving as an abutment for the ejector member. Between the sleeve 3 and the sleeve 8 -. intermediate chamber 22. The end of the sleeve 11 has a bevel 23, which also serves as a stop for the ejector element. In the front part of the injector, there is an ejector chamber 24 formed by the sleeve 11, the front part 15 of the pusher element, the sleeve 25 and the cap nut 26 with the nozzle hole 27. Inside the part 15 there is a channel 28 which communicates the intermediate chamber 22 with the ejection chamber 24.

The device for driving the ejector element contains a piston 29 with a spring 30 fixed on the stationary element 31 rigidly connected to the housing 1. In the element 10 there is a groove where the balls 32 enter. The piston 29 has a rod 33, the slip 1 $ 1H In the element 31 and the return piston 34, in front of the piston 34 there is a chamber 35, the front part of which is formed by a part 36 rigidly connected to the elements 31. The gage 36 has an annular chamber 37. The piston 29 is locked by a latch 38 and a lever 39 with a hook 40 The hook 40 blocks Porsche s 29 from moving.

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when the spring 30 is pulled back and the injector is turned on in the cocked state. The device for supplying the working fluid contains a pump 5 (not shown) and a pipe 41, which is connected via a channel 42 to a liquid chamber 37.

The injector of another embodiment (fig. 3) comprises a housing I,

0 inside which there is an extrusion element 12, the front part of which of a smaller diameter contains a section, made in the form of a truncated cone 43. The injector is equipped

5 by a sleeve 11, the front end of which has a recess for the screw 44, the head of which forms an abutment, and contains radial slots 45. The ejecting element is located in the sleeve 46. The sleeve has a bevel 47 serving as an abutment for pushing out the element with a tapered section 43. At the front end housing 1, a sleeve 48 is screwed, comprising a valve 49 which is provided in

5 moving the spring 50. The front end of the screw head 44 and the rear end of the sleeve 48 form an ejection chamber 24. At the front end of the injector, a part 26 with a nozzle hole 27 is screwed. On the case there is a slot 5 in which the medicine reservoir is attached. 3. The needle 7 is fastened to the socket for piercing the cork of the reservoir, the needle communicating with the channel

51 for air and with camera 52, play the role of intermediate chamber. The chamber 52 communicates with the chamber 53 through the channel 17. An adaptable for driving the ejector

The Q element contains a housing 54 with a handle 2, a piston 55 is located inside the housing, rods 56 and 57. The piston is actuated by working fluid - entering the chamber 58 through channel 59

j and the pipe 41. The communication between the channel 59 and the pipe 41 is carried out by means of the ball valve 60, wherein the movement in the direction of the return stroke can be carried out by pressing n ,. pusher 61 with the help of the trigger bar 62. At the rear end of the body 54, the tube 63 is fixed. In which the spring 64 is placed. At the front end of the stem 57 there are met. ki 65 DG1Ya control position of the piston 55.

The device works as follows. The working tank under the tube through pipe 41 and channel 42 enters the liquid chamber 37 and the piston is behind the rear, the last carries away the sleeves 33 and nopiaeiib 29. which compresses the gf 30 of the piston with the hook 40 This movement is carried away by the back, part 9 and part 12 and the sleeve 8 remains stationary due to friction on the sleeve Zo. After that, the bevel 21 and the taper 13 are in contact and the sleeve 8 moves along the link between the sg 17, -13 and the spring of Cameron 22 is interrupted. Similarly, the sleeve 11 does not fit due to friction on the sleeve 25, After the ii-Kirropoe time.; Sleeve 25 / tgtzts GPRSHO, the movement of the sleeve 1 10z about ne r way away from the bevel 2). Cone 14, opens a message) s;: k-, Y proma; 22 and the Eudedia chamber 24 tiepea dripped 25. As the volume {.1 of chamber 22 is reduced to medicine, it passes into the camera Operator and 33; 29s SJ 9 and 12 p e 2 to about 11 p and y with s1evo, before contact with details. 9 sleeve 8 remains stationary, 1 this polo shesh passage between ksnuso - 13 and bevel 21 is open, Drugs: 11 a from the needle 7 to the nano-plume 17. iS 16 and the slit 19 passes in po.e; the crown of Kabiepy 22j which increases in volume about the beginning of the dvukeii. Hall 1 1 remains HenoiusHKiUMi. until the cone 14pas passes a short distance separating it from the bevel 23, beginning with this — the joint between the chambers — 24 and 22 — is interrupted and the volume in the chamber 24s rapidly decreases, the pressure dramatically increases and the fluid rises through the nozzle bore 27. The injector shown on ftpc and 4 works as follows. When running to the right, the piston 55 carries away part 12 of the pusher element, p the beginning of the xojia part -: a false part ;; 43 departs from bevel 47 ,, as r-fyjvKa h6 (remains but;: one of the same) —and between it and gorpusog 1. Pro; O11 doc: twe; 1Py KUHcocTii b g; d: dz KPra: io; and ica -: a swarm of 53 O1k1ylas; s, when part. Gersdoll; ate sing. vtul 48a head rests on the bottom of the brimstone of the i-i ;;. the front part of the sleeve 46.) the pressure in the chamber 24 is angled, but since the valve jieiHe sj chamber 24 turns out to be more tightly in the intermediate chamber b2, ororonit-return stroke ;;; .elsta- 1 tgr ;; atg; n 61 ldBigast h (lirrpaiO. P I :. V; i T; li:; t LRKP, CjanoiJHTCf lioyr-yug. Om zoirat podiii-j working zcnivtccTi; coder: - c: and act g 58, channel 59 and 7rub} nzsosa Under;: ppst 5ie--;; 7gruzhin: i piston 55 n part 12 of the pusher element abruptly propelled from the left to the left. ei sleeve 45 osta.etts like; -ns: / g between it and the Cornusog-: n when cone 43 engages the second c.Kocf-M 47 sooOsh.enie ;, ka; 1-p: L .; 1 / and 53 interrupted vi sleeve 46 bucket to move with ip-red part 12 of the buoyant element, which extends its bottom, chamber volume 24 is removed, and since it is interrupted, chamber 1b is interrupted, the pressure is 1 rt .; increases, as a result of which the valve 49 from-ajiKMiuieTCH; and contains p to. At least 24 drugs are thrown into the nozzle from the ve)) 27, The proposed needleless injection device. It is easy to sterilize it, remove the front of the unit, the Injector is more accurate dosage and.

Claims (5)

1. A BEARLESS-FREE INJECTOR, comprising a housing, inside which a pushing element is located, an ejection chamber located in front of the housing, one of the walls of which is formed by a pushing element, an intermediate chamber, channels for communicating the drug reservoir with the ejection and intermediate chambers, means for blocking the channels and providing in the ejection chamber a pressure lower than the pressure in the intermediate chamber, a receptacle for placing a reservoir of medicine therein, a device for driving the wasted an elkating element containing a spring-loaded piston, a device for supplying a working fluid comprising a fluid chamber, a pump and a pipe, means for holding the spring in a compressed position, a device for releasing the spring containing a lever, characterized in that, in order to increase the accuracy of dispensing of the injected drug, it is equipped with a valve made in the form of a sleeve, a part of the pushing element is placed inside it, while the end walls of the sleeve have stops to limit the movement of the rod. and to close the channel between the intermediate and ejection chambers. 2. The injector according to claim 1, with respect to the fact that the ejector element is formed by three parts, while the middle part of the ejector element is formed by two truncated cones interconnected by large bases, and the rear end the wall of the sleeve has a bevel for contacting the generatrix g of one of the cones. 3. The injector according to claim 1, characterized in that it is equipped with an additional valve made in the form of a sleeve, one of the parts of the ejector element is placed inside it, while the end walls of the sleeve of the additional valve have a bevel for contacting the middle part of the generatrix of one of the ejector cones item. 4. The injector according to claim 1, characterized in that the device for holding the spring in a compressed position contains a valve that interacts with the lever of the device for OK to drive the spring. 5. The injector according to claim 1, characterized in that the spring-loaded piston rod has at least one mark for monitoring the position of the spring-loaded piston and is equipped with a nut for regulating the volume of the fluid chamber. SU <W 1135426 1135423