CN101554498B - Needleless injection system used for continuously injecting animals - Google Patents
Needleless injection system used for continuously injecting animals Download PDFInfo
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- CN101554498B CN101554498B CN2009100987968A CN200910098796A CN101554498B CN 101554498 B CN101554498 B CN 101554498B CN 2009100987968 A CN2009100987968 A CN 2009100987968A CN 200910098796 A CN200910098796 A CN 200910098796A CN 101554498 B CN101554498 B CN 101554498B
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- 239000007924 injection Substances 0.000 title claims abstract description 75
- 238000002347 injection Methods 0.000 title claims abstract description 75
- 241001465754 Metazoa Species 0.000 title claims abstract description 27
- 239000003814 drug Substances 0.000 claims abstract description 58
- 229940079593 drug Drugs 0.000 claims abstract description 49
- 238000003860 storage Methods 0.000 claims abstract description 46
- 230000005291 magnetic effect Effects 0.000 claims abstract description 20
- 239000003708 ampul Substances 0.000 claims description 42
- 230000008878 coupling Effects 0.000 claims description 36
- 238000010168 coupling process Methods 0.000 claims description 36
- 238000005859 coupling reaction Methods 0.000 claims description 36
- 230000000694 effects Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000007363 ring formation reaction Methods 0.000 claims description 2
- 238000007920 subcutaneous administration Methods 0.000 abstract description 2
- 238000012377 drug delivery Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 17
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 241000282898 Sus scrofa Species 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229960005486 vaccine Drugs 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 229940090046 jet injector Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
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Abstract
The invention discloses a needleless injection system used for continuously injecting animals, which belongs to the technical field of needless subcutaneous drug delivery system in medical appliances,and comprises an injection tube, a drug storage and a push shot device; the injection tube comprises a tube body provided with a cavity chamber; the cavity chamber at the front end of the tube body i s provided with an injection head; the front end wall of the tube body is provided with a drug storage joint connected with the drug storage; the push shot device comprises a magnetic piston movably arranged in the cavity chamber at the back end of the tube body as well as a shell, a ball bearing lock unit, a coupler and a stepping motor which are arranged behind the tube body in sequence; a main push rod with a main spring is arranged in the shell; the front end part of the main push rod is provided with a magnetic element; the back end of the main push rod penetrates the ball bearing lock unit, then movably enters the coupler and is clamped in the coupler; the coupler is hollow; and a nut on the coupler is matched with the screw rod of the stepping motor. The needleless injection system used for continuously injecting animals can be repeatedly used and can automatically suck drug so as to realize quick scale injection; moreover, the needleless injection system used for continuously injecting animals is electrically restored and is convenient to be carried.
Description
Technical field
The invention discloses a kind of Needleless injection system that is used for continuously injecting animals, belong to subcutaneous needleless drug-supplying system technical field in the medical device.
Background technology
The needleless injection of liquids technology moves to maturity at medical field, and it is to produce the subcutaneous tissue that high-speed jet directly enters into the people by the powered medicine.International Standards Organization (ISO) has issued the Needleless injection device standard (ISO21649:2006) at clinical use in 2006.
The needleless injector of a standard is made up of two parts usually: is used for sucking medicine, splendid attire medicine and launches the injection tube (ampoule) of medicine, and the device of propelling that can produce thrust when triggering.Propel device and comprise power set, flip flop equipment.Power is produced by the gas or the spring of compression usually.Divide according to the number of times that single ampoule can be injected, needleless injector can be divided into disposable needleless injector and nonexpondable jet injector.The present Needleless injection system that uses, mostly what be used for the human injection is disposable, wherein some is part disposable (ampoule is disposable use, propels device and can use repeatedly), and some then is overall time (Compressed Gas with encapsulation is a power usually).
The preposition patent of applicant " the novel injector that is used for the Needleless injection " (patent No.: ZL200620140489.3), (patent No.: ZL200720192720.8) all described and a kind ofly produce power and the needleless injector that can use is repeatedly propelled device by spring, this device meshes by elastic fin and the bolt thread that has spring and carries out power and reset " device of propelling that is used for needleless injection of liquids ".Another applies for a patent that " what be used for liquid jet injection propels device (application number: 200920114142.5) then described a kind of needleless injector that resets by clasp nut and propelled device the applicant.
Needleless injection system also can be used for the animal injection.Cultivated animals will carry out inoculation usually.For example, for avoiding swine fever, the intensive pig production field require to annual spring of pig, autumn with each immunity inoculation of vaccine once.Problems such as pin injection causing usually complicated operation, dosage inaccuracy, infection easily, environmental pollution are arranged, and Needleless injection system can be avoided these problems.Because the animal injection does not resemble human injection's strictness so to the hygienic requirements of injecting systems, and the inoculation of animal usually concentrates batch to carry out, this Needleless injection system that just requires to be used for the animal injection can repeatedly use, and preferably can inhale medicine, injection continuously automatically.
Summary of the invention
Animal vaccine injection characteristics at above-mentioned the invention provides a kind of can repeatedly the use, and can inhale the Needleless injection system that is used for continuously injecting animals of medicine automatically, and this system can realize quick scale injection.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of Needleless injection system that is used for continuously injecting animals comprises injection tube, Drug Storage, propels device, and injection tube comprises the cylindrical shell that has chamber,
In the described barrel front end chamber injection head is installed, this injection head comprise be movably arranged in the sleeve, the front end end offers spray orifice and leading section extends outside sleeve ampoule, the rear portion external diameter of ampoule is less than sleeve diameter, and be with spring on the outer wall of rear portion, offer several through holes on the rear wall simultaneously; The end of ampoule is packaged with boss, and the step of boss and sleeve rear end closely cooperates, and the internal diameter of step is greater than the external diameter at ampoule rear portion, less than the diameter of spring;
The Drug Storage joint that connects Drug Storage is installed on the described barrel front end wall, and this Drug Storage joint comprises the body of both ends open, and body ante-chamber internal diameter is less than the back cavity internal diameter, and cavity outer wall is connected on the barrel wall behind the body; Be provided with spool in the body back cavity, the external diameter of spool is less than the back cavity internal diameter, greater than the ante-chamber internal diameter; In the middle of the rear end face of spool, be provided with the cylinder of diameter less than the spool external diameter, cylinder end extends to and is opened on the barrel front end wall, and in first through hole that is communicated with chamber, and this cylinder is with back-moving spring outward, and the external diameter of back-moving spring is greater than the diameter of first through hole; First through hole then is positioned at telescopic rear;
The described device of propelling comprises the magnetic piston that is movably arranged in the cylinder back-end chamber, and the housing, ball lock uint, coupling device, the motor that are installed in the cylindrical shell rear successively, and its middle shell directly is fixed in the end of cylindrical shell; The primary push rod of band main spring is installed in the housing, and the front end end of primary push rod is provided with magnetics, and the diameter of magnetics is greater than cylinder internal diameter; The middle part of primary push rod offers the 3rd circumferential slot, and its right end face of the 3rd circumferential slot is an inclined plane to the inclination of primary push rod rear end; The rear end of primary push rod is passed Cylinder lock with ball and is attached together the postpone activity and enter coupling device, and is arranged in the coupling device;
The distal end faces of described housing extends outward an outer ring, offers second through hole on the outer ring; Described ball lock uint comprises the movable outer ring that sets gradually from outside to inside, movable inner ring, inner ring; Movable outer ring is equipped with ring outer wall outside, and movable inner ring is equipped with at the outer ring inwall, pass through the screw Joint between movable outer ring and the movable inner ring, and this screw is positioned at second through hole; Inner ring is equipped with on the outer wall of the rear end of primary push rod, the terminal outer wall of the inner ring formation projection that stretches out, and inner ring leaves certain stroke by this projection and outer ring Joint between the right side of movable inner ring and the left side of projection; The inwall of movable inner ring is provided with one and encloses the projection that extends internally and form, and projection matches with inner ring, and protruding right side is an inclined-plane that is tilted to the left; Be provided with first back-moving spring in the space between projection left side and shell end end face; On the inner ring, be positioned at protruding right side, offer the small through hole that is placed with ball;
Described coupling device is hollow type, and end wall is provided with the nut that matches with the leading screw of motor thereafter, and this nut communicates with the cavity of coupling device, and the front end end face external diameter of coupling device is greater than the internal diameter of movable outer ring.
Described ampoule, piston, primary push rod, leading screw are positioned on the same centrage.
Several through holes on the described ampoule rear wall are circumferential distribution.
The described anterior outer wall of ampoule that is positioned at sleeve offers circumferential slot, and sealing ring is installed in the circumferential slot.
Described spool front end is cone, and the conical inboard wall that carries out the transition to the body ante-chamber with the body back cavity matches, and taper seat is provided with first circumferential slot, and first sealing ring is installed in first circumferential slot.
Offer two second through holes that the position is relative on the described outer ring; On the described inner ring, be positioned at protruding right side, offer the small through hole that two positions are placed with ball relatively and all.
Offer twice inside on the described piston nose outer wall second circumferential slot of second sealing ring all is installed; Cylindrical shell postmedian inwall is provided with back-up ring, and piston postmedian outer wall offers the circumferential elongated slot that matches with back-up ring; Piston end is embedded with magnetic block.
Described Drug Storage joint be convexly set in the barrel front end wall on the cylindrical shell joint by being threaded, and Drug Storage joint integral body is tilted to the right.
The body ante-chamber of described Drug Storage joint is the flange of outer projection, can be by hose connection to Drug Storage.
The front end end thread of described cylindrical shell is connected with capping, and the ampoule leading section extends outside capping.
A kind of Needleless injection system that is used for continuously injecting animals of the present invention, starting motor earlier just changes it, because the leading screw of motor cooperates with the nut of coupling device, therefore the rotation of motor will drive coupling device toward the pulling of motor direction (being about to coupling device pulls back), coupling device drives primary push rod again toward post-tensioning, compress main spring simultaneously, the magnetics of primary push rod front end end is again with the past post-tensioning of magnetic piston.Piston is in the process of post-tensioning, and the spool of Drug Storage joint is at medicinal liquid pressure and the piston suction lower compression back-moving spring toward post-tensioning, and to the compression of cylindrical shell direction, make medicinal liquid by spool and body after gap between the cavity wall, indoor along the first through hole inflow chamber.When primary push rod advances to main spring arrival final position backward, the ball that is positioned at small through hole just enters into the 3rd circumferential slot along the inclined plane, movable inner ring rearward moves under the elastic restoring force effect of first back-moving spring simultaneously, finally be against on the projection, this moment, the projection of movable inner ring was just pushed down ball, thereby primary push rod is pinned.Because by the screw Joint, therefore also rearward move under the drive of movable inner ring movable outer ring between movable outer ring and the movable inner ring, the rear end end face of final movable outer ring extends outside the end face of the rear end of outer ring, inner ring.
During injection, the ampoule front end of injection head is propped up skin, the effect of thrust is moved ampoule backward in sleeve, holddown spring, and the step of the boss that makes the ampoule end and sleeve rear end separates, and at this moment the medicinal liquid in chamber enters in the gap between ampoule rear portion outer wall and the sleeve rear inside wall by the gap between boss and the step, by being opened in the through hole on the ampoule rear wall, finally enter in the ampoule again.At this moment, control signal is restarted motor makes its counter-rotating, and the leading screw of motor drives coupling device and moves forward, and until stopping near ball lock uint (apart from about 1-3mm), Needleless injection system is in and waits to propel like this, state just to be injected.Because for flexibly connecting, so coupling device is when moving forward between primary push rod and the coupling device, primary push rod is motionless.
When injecting at last, control signal makes motor continue counter-rotating, and coupling device continues to move ahead, and until coupling device the movable outer ring of ball lock uint is against the shell end end face.When movable outer ring moves ahead, the movable inner ring of band also moves ahead, and the moving ahead of movable inner ring, make projection break away from ball, ball loses primary push rod locking effect like this, primary push rod moves ahead under the elastic restoring force effect of main spring fast, promotes piston when primary push rod moves ahead simultaneously and moves ahead fast, and medicinal liquid ejects from the spray orifice of ampoule the most at last.When piston moved ahead, the spool of Drug Storage joint moved forward under the elastic restoring force effect of back-moving spring, and until the cavity sealing of spool front end with the body ante-chamber, medicinal liquid just can not be back in the Drug Storage like this, and spool plays the effect of check valve at this.
In a word, the present invention can repeatedly use, and can inhale medicine automatically, so that can realize the injection of quick scale, and electronicly reset, easy to carry.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Structural representation when Fig. 2 injects for Fig. 1;
Fig. 3 is the structure for amplifying sketch map of injection tube among Fig. 1;
Fig. 4 is for propelling the structure for amplifying sketch map of device among Fig. 1;
Fig. 5 is the structure for amplifying sketch map of injection tube among Fig. 2;
Fig. 6 is for propelling the structure for amplifying sketch map of device among Fig. 2;
Fig. 7 is the structure for amplifying sketch map of Drug Storage joint among Fig. 3;
Fig. 8 is the structure for amplifying sketch map of ball lock uint among Fig. 4;
Fig. 9 is that the ball lock uint is from locking state to the sketch map that begins to discharge;
Figure 10 for the ball lock uint from release conditions to the sketch map that begins to lock.
The specific embodiment
As shown in Figure 1, a kind of Needleless injection system that is used for continuously injecting animals of the present invention comprises injection tube 1, Drug Storage 2, propels device 3.
As shown in Figure 3, injection tube 1 comprises the cylindrical shell 12 that has chamber 11, in the cylindrical shell 12 front end chambers 11 injection head is installed, this injection head comprise be movably arranged in the sleeve 13, the front end end offers spray orifice 14 and leading section extends outside sleeve 13 ampoule 15, the rear portion external diameter of ampoule 15 is less than sleeve 13 internal diameters, and be with spring 16 on the outer wall of rear portion, offer several through holes 17 on the rear wall simultaneously; The end of ampoule 15 is packaged with boss 18, and the step 19 of boss 18 and sleeve 13 rear ends closely cooperates, and the internal diameter of step 19 is greater than the external diameter at ampoule 15 rear portions, less than the diameter of spring 16.For making the more even of injecting liquid drug, jeting effect is better, and several through holes 17 on ampoule 15 rear wall are circumferential distribution.For guarantee that further ampoule 15 keeps sealing with sleeve 13 inwalls when movable in sleeve 13, the ampoule 15 anterior outer walls that are positioned at sleeve 13 offer circumferential slot 151, and sealing ring 152 is installed in the circumferential slot 151.For further improving the structure of injection tube 1, the front end end thread of cylindrical shell 12 is connected with capping 121, and ampoule 15 leading sections extend outside capping 121.
As Fig. 3, shown in Figure 7, the Drug Storage joint that connects Drug Storage 2 is installed on cylindrical shell 12 front bulkheads, this Drug Storage joint comprises the body 21 of both ends open, and body ante-chamber 22 internal diameters are less than body back cavity 23 internal diameters, and body back cavity 23 outer walls are connected on cylindrical shell 12 walls; Be provided with spool 24 in the body back cavity 23, the external diameter of spool 24 is less than back cavity internal diameter 23, greater than ante-chamber internal diameter 22; In the middle of the rear end face of spool 24, be provided with the cylinder 25 of diameter less than spool 24 external diameters, cylinder 25 ends extend to and are opened on cylindrical shell 12 front bulkheads, and in first through hole 26 that is communicated with chamber 11, and be with back-moving spring 27 outside this cylinder 25, the external diameter of back-moving spring 27 is greater than the diameter of first through hole 26; 26 rears that are positioned at sleeve 13 of first through hole.For further guaranteeing the sealing of spool 24, spool 24 front ends are cone, and the conical inboard wall that carries out the transition to body ante-chamber 22 with body back cavity 23 matches, and taper seat is provided with in first circumferential slot, 28, the first circumferential slots 28 first sealing ring 29 is installed.For ease of the dismounting of Drug Storage joint, and the medicinal liquids in the Drug Storage 2 are flowed in the chamber 11 more smoothly, the Drug Storage joint be convexly set in cylindrical shell 12 front bulkheads on cylindrical shell joint 122 by being threaded, and Drug Storage joint integral body is tilted to the right.Be connected saferly, convenient for making between Drug Storage 2 and the Drug Storage joint, the body ante-chamber 22 of Drug Storage joint is the flange of outer projection, can be by hose connection to Drug Storage 2.
Owing to require cultivated animals is injected continuously, need to realize to inhale medicine from Drug Storage 2, carry out jet injection from injection head then, inhale medicine from Drug Storage 2 again after having injected, therefore in Drug Storage joint and injection head, be provided with one-way valve structures, i.e. spool 24 and boss 18, when making from Drug Storage 2 suction medicines, the spool 24 of Drug Storage joint is opened, and the boss 18 of injection head is closed, and medicinal liquid flows into chamber 11 from Drug Storage 2; During injection, the spool 24 of Drug Storage joint is closed, and the boss 18 of injection head is opened, and medicinal liquid ejects from the spray orifice 14 of injection head front end under the thrust of piston 31.
As shown in Figure 4, propel device 3 and comprise the magnetic piston 31 that is movably arranged in the cylindrical shell 12 rear end chambers, and the housing 4, ball lock uint, coupling device 5, the motor 6 that are installed in cylindrical shell 12 rears successively, its middle shell 4 directly is fixed in the end of cylindrical shell 12; The primary push rod 42 of band main spring 41 is installed in the housing 4, and the front end end of primary push rod 42 is provided with magnetics 43, and the diameter of magnetics 43 is greater than cylindrical shell 12 internal diameters; The middle part of primary push rod 42 offers the 3rd circumferential slot 422, and its right end face of the 3rd circumferential slot 422 is an inclined plane 423 to the inclination of primary push rod 42 rear ends; The rear end of primary push rod 42 is passed Cylinder lock with ball and is attached together the postpone activity and enter coupling device 5, and is arranged in the coupling device 5.For further guaranteeing the sealing of piston 31, offer second circumferential slot 312 that twice inside all is equipped with second sealing ring 311 on the piston 31 front end outer walls.Because the stroke of piston 31 is relevant with the suction dose, the dosage of per injection just is relevant, therefore, in order to realize setting to injected dose, cylindrical shell 12 postmedian inwalls are provided with back-up ring 123, piston 31 postmedian outer walls offer the circumferential elongated slot 313 that matches with back-up ring 123, so just can regulate injected dose by the position of regulating back-up ring 123.Simultaneously, the setting of back-up ring 123 is blocked by back-up ring 123 in the time of can making piston 31 advance to certain stroke, so that piston 31 is thrown off (torsional forces of motor 6 is greater than magnetic force) with primary push rod 42.And piston 31 is thrown off the impulsive force that helps increasing primary push rod 42 percussion pistons 31 with primary push rod 42, strengthens jet performance, helps injection.Magnetic piston 31 is embedded with the piston 31 of magnetic block 314 for end.
As Fig. 4, shown in Figure 8, the distal end faces of housing 4 extends outward an outer ring 424, offers second through hole 425 on the outer ring 424.The ball lock uint comprises movable outer ring 71, movable inner ring 72, the inner ring 73 that sets gradually from outside to inside.Movable outer ring 71 is equipped with 424 outer walls in the outer ring, and movable inner ring 72 is equipped with 424 inwalls in the outer ring, pass through screw 74 Joints between movable outer ring 71 and the movable inner ring 72, and this screw 74 is positioned at second through hole 425.Inner ring 73 is equipped with on the outer wall of the rear end of primary push rod 42, inner ring 73 terminal outer walls stretch out and form projection 731, inner ring 73 leaves certain stroke by this projection 731 and outer ring 424 Joints between the left side of the right side of movable inner ring 72 and projection 731.The inwall of movable inner ring 72 is provided with that a circle extends internally and the projection 721 that forms, and projection 721 matches with inner ring 73, and protruding 721 right sides are an inclined-plane that is tilted to the left.Be provided with first back-moving spring 75 in the space between protruding 721 left sides and housing 4 distal end faces.On the inner ring 73, be positioned at protruding 721 right sides, offer the small through hole 77 that is placed with ball 76.More steady for what movable outer ring 71, movable inner ring 72 were moved, offer two second through holes 425 that the position is relative on the outer ring 424.More stable for the locking state that makes primary push rod 42, on the inner ring 73, be positioned at protruding 721 right sides, offer the small through hole 77 that two positions are placed with ball 76 relatively and all.
Coupling device 5 is hollow type, and end wall is provided with the nut 51 that matches with the leading screw 61 of motor 6 thereafter, and this nut 51 communicates with the cavity of coupling device 5, and the front end end face external diameter of coupling device 5 is greater than the internal diameter of movable outer ring 71.
Drug Storage 2 of the present invention can be fixed on the injecting systems shell with the general bigger graduated syringe that has, and the blank area of original syringe needle is linked the Drug Storage joint by flexible pipe in the syringe.
Operation principle of the present invention is as follows:
As Fig. 2, Fig. 5, shown in Figure 6, starting motor 6 earlier just changes it, because the leading screw 61 of motor 6 cooperates with the nut 51 of coupling device 5, therefore the rotation of motor 6 will drive coupling device 5 toward the pulling of motor 6 directions (being about to coupling device 5 pulls back), coupling device 5 drives primary push rod 42 again toward post-tensioning, compress main spring 41 simultaneously, the magnetics 43 of primary push rod 42 front end ends is again with magnetic piston 31 past post-tensionings.Piston 31 is in the process of post-tensioning, the spool 24 of Drug Storage joint is at the suction lower compression back-moving spring 27 of medicinal liquid pressure and piston 31 past post-tensionings, and, make medicinal liquid pass through gap between spool 24 and body back cavity 23 inwalls, along in first through hole, the 26 inflow chambers 11 to cylindrical shell 12 directions compressions.When primary push rod 42 advances to main spring 41 arrival final positions backward, the ball 76 that is positioned at small through hole 77 just 423 enters into the 3rd circumferential slot 422 along the inclined plane, movable inner ring 72 rearward moves under the elastic restoring force effect of first back-moving spring 75 simultaneously, finally be against on the projection 731, this moment, the projection 721 of movable inner ring 72 was just pushed down ball 76, thereby primary push rod 42 is pinned.Because by screw 74 Joints, therefore also rearward move under the drive of movable inner ring 72 movable outer ring 71 between movable outer ring 71 and the movable inner ring 72, the rear end end face of final movable outer ring 71 extends outside the rear end end face of outer ring 424, inner ring 73.
During injection, ampoule 15 front ends of injection head are propped up skin, the effect of thrust is moved ampoule 15 backward in sleeve 13, holddown spring 16, and the step 19 of the boss 18 that makes ampoule 15 ends and sleeve 13 rear ends separates, and at this moment the medicinal liquid in chamber 11 enters in the gap between ampoule 15 rear portion outer walls and sleeve 13 rear inside wall by the gap between boss 18 and the step 19, by being opened in the through hole 17 on ampoule 15 rear wall, finally enter in the ampoule 15 again.At this moment, control signal is restarted motor 6 makes its counter-rotating, and the leading screw 61 of motor 6 drives coupling device 5 and moves forward, until stopping near ball lock uint (apart from about 1-3mm), Needleless injection system is in and waits to propel like this, state just to be injected.Owing to be flexible connection between primary push rod 42 and the coupling device 5, so coupling device 5 is when moving forward, and primary push rod 42 is motionless.
When injecting at last, control signal makes motor 6 continue counter-rotating, and coupling device 5 continues to move ahead, and until coupling device 5 the movable outer ring 71 of ball lock uint is against housing 4 distal end faces.When movable outer ring 71 moves ahead, the movable inner ring 72 of band also moves ahead, and the moving ahead of movable inner ring 72, make projection 721 break away from ball 76, ball 76 loses primary push rod 42 locking effects like this, primary push rod 42 moves ahead under the elastic restoring force effect of main spring 41 fast, promotes piston 31 when primary push rod 42 moves ahead simultaneously and moves ahead fast, and medicinal liquid ejects from the spray orifice 14 of ampoule 15 the most at last.When piston 31 moves ahead, the spool 24 of Drug Storage joint moves forward under the elastic restoring force effect of back-moving spring 27, until the cavity sealing of spool 24 front ends with body ante-chamber 22, medicinal liquid just can not be back in the Drug Storage 2 like this, and spool 24 plays the effect of check valve at this.
Represent for the operation principle that makes the ball lock uint is clearer, Fig. 9 has illustrated the ball lock uint from the state diagram of locking state when beginning to discharge, when the ball lock uint is in locking state, main spring 41 is in compressive state, primary push rod 42 is subjected to thrust left, ball 76 is by pushing down the 3rd circumferential slot 422, thereby pins primary push rod 42; When promotion activity outer ring 71 during to left movement, be moved to the left by screw 74 drive activity inner rings 72, ball 76 just under primary push rod 42 active force and the characteristic on inclined plane 423 left, loses the locking effect to primary push rod 42.
Figure 10 has illustrated the ball lock uint from the state diagram of release conditions when beginning to lock, primary push rod 42 moves right in the process, when the inclined plane 423 of the 3rd circumferential slot 422 contacts with ball 76, movable inner ring 72 is owing to be subjected to first back-moving spring 75 thrust to the right, the i.e. elastic restoring force of first back-moving spring 75, the projection 721 of movable inner ring 72 just is pressed into ball 76 in the 3rd circumferential slot 422 along inclined plane 423, thereby primary push rod 42 is pinned.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.
Claims (10)
1. a Needleless injection system that is used for continuously injecting animals comprises injection tube, Drug Storage, propels device, and injection tube comprises the cylindrical shell that has chamber, it is characterized in that:
In the described barrel front end chamber injection head is installed, this injection head comprise be movably arranged in the sleeve, the front end end offers spray orifice and leading section extends outside sleeve ampoule, the rear portion external diameter of ampoule is less than sleeve diameter, and be with spring on the outer wall of rear portion, offer several through holes on the rear wall simultaneously; The end of ampoule is packaged with boss, and the step of boss and sleeve rear end closely cooperates, and the internal diameter of step is greater than the external diameter at ampoule rear portion, less than the diameter of spring;
The Drug Storage joint that connects Drug Storage is installed on the described barrel front end wall, and this Drug Storage joint comprises the body of both ends open, and body ante-chamber internal diameter is less than body back cavity internal diameter, and cavity outer wall is connected on the barrel wall behind the body; Be provided with spool in the body back cavity, the external diameter of spool is less than the back cavity internal diameter, greater than body ante-chamber internal diameter; In the middle of the rear end face of spool, be provided with the cylinder of diameter less than the spool external diameter, cylinder end extends to and is opened on the barrel front end wall, and in first through hole that is communicated with chamber, and this cylinder is with back-moving spring outward, and the external diameter of back-moving spring is greater than the diameter of first through hole; First through hole then is positioned at telescopic rear;
The described device of propelling comprises the magnetic piston that is movably arranged in the cylinder back-end chamber, and the housing, ball lock uint, coupling device, the motor that are installed in the cylindrical shell rear successively, and its middle shell directly is fixed in the end of cylindrical shell; The primary push rod of band main spring is installed in the housing, and the front end end of primary push rod is provided with magnetics, and the diameter of magnetics is greater than cylinder internal diameter; The middle part of primary push rod offers the 3rd circumferential slot, and its right end face of the 3rd circumferential slot is an inclined plane to the inclination of primary push rod rear end; The rear end of primary push rod is passed Cylinder lock with ball and is attached together the postpone activity and enter coupling device, and is arranged in the coupling device;
The distal end faces of described housing extends outward an outer ring, offers second through hole on the outer ring; Described ball lock uint comprises the movable outer ring that sets gradually from outside to inside, movable inner ring, inner ring; Movable outer ring is equipped with ring outer wall outside, and movable inner ring is equipped with at the outer ring inwall, pass through the screw Joint between movable outer ring and the movable inner ring, and this screw is positioned at second through hole; Inner ring is equipped with on the outer wall of the rear end of primary push rod, the terminal outer wall of the inner ring formation projection that stretches out, and inner ring leaves certain stroke by this projection and outer ring Joint between the right side of movable inner ring and the left side of projection; The inwall of movable inner ring is provided with one and encloses the projection that extends internally and form, and projection matches with inner ring, and protruding right side is an inclined-plane that is tilted to the left; Be provided with first back-moving spring in the space between projection left side and shell end end face; On the inner ring, be positioned at protruding right side, offer the small through hole that is placed with ball;
Described coupling device is hollow type, and end wall is provided with the nut that matches with the leading screw of motor thereafter, and this nut communicates with the cavity of coupling device, and the front end end face external diameter of coupling device is greater than the internal diameter of movable outer ring.
2. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1, it is characterized in that: described ampoule, piston, primary push rod, leading screw are positioned on the same centrage.
3. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: several through holes on the described ampoule rear wall are circumferential distribution.
4. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: the anterior outer wall of described ampoule that is positioned at sleeve offers circumferential slot, and sealing ring is installed in the circumferential slot.
5. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1, it is characterized in that: described spool front end is cone, the conical inboard wall that carries out the transition to the body ante-chamber with the body back cavity matches, and taper seat is provided with first circumferential slot, and first sealing ring is installed in first circumferential slot.
6. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: offer two second through holes that the position is relative on the described outer ring; On the described inner ring, be positioned at protruding right side, offer the small through hole that two positions are placed with ball relatively and all.
7. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: offer second circumferential slot that twice inside all is equipped with second sealing ring on the described piston nose outer wall; Cylindrical shell postmedian inwall is provided with back-up ring, and piston postmedian outer wall offers the circumferential elongated slot that matches with back-up ring; Piston end is embedded with magnetic block.
8. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: described Drug Storage joint be convexly set in the barrel front end wall on the cylindrical shell joint by being threaded, and Drug Storage joint integral body is tilted to the right.
9. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: the body ante-chamber of described Drug Storage joint is the flange of outer projection.
10. a kind of Needleless injection system that is used for continuously injecting animals as claimed in claim 1 is characterized in that: the front end end thread of described cylindrical shell is connected with capping, and the ampoule leading section extends outside capping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100987968A CN101554498B (en) | 2009-05-21 | 2009-05-21 | Needleless injection system used for continuously injecting animals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100987968A CN101554498B (en) | 2009-05-21 | 2009-05-21 | Needleless injection system used for continuously injecting animals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101554498A CN101554498A (en) | 2009-10-14 |
| CN101554498B true CN101554498B (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100987968A Expired - Fee Related CN101554498B (en) | 2009-05-21 | 2009-05-21 | Needleless injection system used for continuously injecting animals |
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| Country | Link |
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| CN (1) | CN101554498B (en) |
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| CN102652848A (en) * | 2010-08-30 | 2012-09-05 | 北京快舒尔医疗技术有限公司 | Electromagnetic continuous needleless injector with dose and injection depth adjusting faction |
| CN101940504B (en) * | 2010-09-10 | 2012-07-11 | 陈凯 | Device for automatic and continuous injection of poultry |
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| CN102940923A (en) * | 2012-11-12 | 2013-02-27 | 江苏丞宇米特医疗科技有限公司 | Low-pressure needle-free injection device capable of enabling liquid medicine to be jetted in atomized shape |
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| CN108784754B (en) * | 2018-04-18 | 2021-05-28 | 河南科技大学第一附属医院 | Lung puncture biopsy device |
| KR102199724B1 (en) * | 2018-10-05 | 2021-01-07 | 주식회사 피테크 | Painless injection device without needle |
| CN112827015A (en) * | 2021-01-07 | 2021-05-25 | 柴春维 | Medical oncology is with equipment of dosing |
| CN113842522B (en) * | 2021-09-27 | 2023-08-29 | 重庆市人民医院 | Adjustable small-dose injection pump |
| CN115463288A (en) * | 2022-09-07 | 2022-12-13 | 北京快舒尔医疗技术有限公司 | Needleless injector |
| CN115463289B (en) * | 2022-09-07 | 2024-04-02 | 北京快舒尔医疗技术有限公司 | Needleless injector |
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| CN101554498A (en) | 2009-10-14 |
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