A kind of ampoule of the minimally-invasive injecting systems for animal injection
Technical field
This utility model discloses a kind of ampoule of the minimally-invasive injecting systems for animal injection, belongs to the architecture advances technical field of ampoule in the animal injecting systems.
Background technology
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.At present traditional veterinary syringe causes problems such as complicated operation, injection speed are slow, dosage inaccuracy, infections easily, environmental pollution usually, is not suitable for injecting in the large-scale plant scale of carrying out.
The preposition patent of applicant " a kind of Needleless injection system for continuously injecting animals " (patent No.: ZL200910098796.8) described a kind of hand-held, drive, can realize the Needleless injection system of injection continuously by motor and spring.During start injection, the motor of band decelerator rotates, and cooperates the compression main spring by leading screw, simultaneously with the medicinal liquid intake chamber of Drug Storage.When the compression spring arrives the final position, by a ball lock uint push rod is pinned.After pinning push rod, the motor counter-rotating drives the coupling tube and oppositely moves ahead, and makes injector be in state to be injected.During injection, control signal makes motor continue counter-rotating, promote the coupling tube and move ahead, and with push rod from the lock uint release, push rod moves ahead under the effect of main spring fast, percussion piston, and the spout of liquid from ampoule ejected.Though the Needleless injection system that this patent is described can be realized fast injection continuously, mainly exists the lower problem of following injection pressure, is not suitable for large-scale cultivated animals and large bolus injection.Needleless injection is used for the animal vaccine injection, and having increases biological safety, increases injection efficiency, increases the meat safety, increases injection speed, increases operator safety, reduces a series of advantages such as traumatic of animal.But Needleless injection is in injection process, and needing expulsion pressure to reach after certain threshold value could skin puncture, and larger animal such as pig, cattle often when germling keratodermatitis just thicker, need very high expulsion pressure ability skin puncture.Like this, need complicated power to produce usually and trigger device such as locking at the Needleless injection system of larger animal, heaviness, cost costliness, operation inconvenience are carried by the system that makes.In addition, too high injection pressure can be goed deep into subcutaneous tissue after skin puncture, might touch positions such as organ, and animal is damaged.
The utility model content
At the problems referred to above, this utility model provides a kind of ampoule of the minimally-invasive injecting systems for animal injection.
For achieving the above object, the technical scheme that this utility model adopts is:
A kind of ampoule of the minimally-invasive injecting systems for animal injection comprises that the front end of fluid joint is equipped with a syringe needle by being installed in fluid joint on the housing behind the forward direction successively, inhaling medicine joint, piston.
As the further setting of such scheme, described syringe needle comprises the pin that is installed on the needle stand, and pin is installed in the front end of fluid joint by needle stand.
Described needle stand is fixed on the front end of fluid joint by solid needle guard.Gu needle guard has through hole, on the front end outer wall that is threaded onto housing, and needle stand and fluid joint compressed, pin and needle stand all are positioned at this through hole.
On the outer wall of described solid needle guard spring housing is installed, and form a cavity between spring housing and the solid needle guard, the spring that props up the spring housing front inner wall is installed in the cavity, leave gap H between the rear end outer wall of spring housing and the solid needle guard, Gu the front end of needle guard is equipped with the catch that is positioned at the spring housing front end, the syringe needle end cap is installed on the spring housing front end side wall, and needle end covers and offers pin hole.Catch is fixed on solid needle guard outside with spring housing, and by spring housing the spring of the inside is pushed down, and certain precompressed amount is arranged.Pin hole is used for cooperating the turnover of pin.
Described catch is by being threaded in the front end of solid needle guard.
Described syringe needle end cap is by being threaded on the spring housing front end side wall.
The rear end of described piston is connected with piston rod, and by be threaded (being specially the inner hole thread of piston and the external screw thread of piston rod is connected), the other end outer wall of piston rod is provided with external screw thread between an end of piston rod and the piston.
Ampoule cover and ampoule fixed cover are installed on the outer wall of described housing rear end.
The gap H that leaves between the rear end outer wall of described spring housing and the solid needle guard is 5mm, and the needle point of pin is 1mm apart from the horizontal range of syringe needle end cap front end outer wall.The data that distance described herein is this utility model ampoule when injecting.
This utility model is on dynamic structure (the propelling device) basis of preposition patent " a kind of Needleless injection system for continuously injecting animals " and design.Front end of the present utility model contains a tiny syringe needle, and syringe needle just thrusts brokenly zoodermic cuticle during injection, and does not go deep into the tissue of skin.Carry out jet injection in the cuticle of punctures skin, required like this expulsion pressure can reduce greatly.In addition, because miniature syringe needle only touches skin surface, do not enter skin inside as yet, therefore be difficult to touch blood vessel and nerve in skin and the subcutaneous tissue, the infection that acupuncture brings and pain reaction are also fewer.This ampoule design effectively combines acupuncture injection and Needleless injection, has the advantage of the two concurrently.
This utility model can be used with the device of propelling of various Needleless injection systems applicable to various Needleless injection systems.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 for this utility model be installed in Needleless injection system propel on the device time structural representation.
The specific embodiment
As shown in Figure 1, the ampoule of a kind of minimally-invasive injecting systems for animal injection of this utility model comprises that the front end of fluid joint 2 is equipped with a syringe needle by being installed in fluid joint 2 on the housing 1 behind the forward direction successively, inhaling medicine joint 3, piston 4.Syringe needle comprises the pin 6 that is installed on the needle stand 5, and pin 6 is installed in the front end of fluid joint 2 by needle stand 5.Needle stand 5 is fixed on the front end of fluid joint 2 by solid needle guard 7.Gu needle guard 7 has through hole, on the front end outer wall that is threaded onto housing 1, and needle stand 5 and fluid joint 2 compressed, pin 6 and needle stand 5 all are positioned at this through hole.Gu spring housing 8 is installed on the outer wall of needle guard 7, and form a cavity 9 between spring housing 8 and the solid needle guard 7, the spring 10 that props up spring housing 8 front inner wall is installed in the cavity 9, leave gap H between the rear end outer wall of spring housing 8 and the solid needle guard 7, Gu the front end of needle guard 7 is equipped with the catch 11 that is positioned at spring housing 8 front ends, on spring housing 8 front end side wall syringe needle end cap 12 is installed, offers pin hole 13 on the syringe needle end cap 12.Catch 11 is fixed on solid needle guard 7 outsides with spring housing 8, and by spring housing 8 spring 10 of the inside is pushed down, and certain precompressed amount is arranged.Pin hole 13 is used for cooperating the turnover of pin 6.
Catch 11 is by being threaded in the front end of solid needle guard 7.Syringe needle end cap 12 is by being threaded on spring housing 8 front end side wall.
The rear end of piston 4 is connected with piston rod 14, and by be threaded (being specially the inner hole thread of piston 4 and the external screw thread of piston rod 14 is connected), the other end outer wall of piston rod 14 is provided with external screw thread between an end of piston rod 14 and the piston 4.
Ampoule cover 15 and ampoule fixed cover 16 are installed on the housing 1 rear end outer wall.
The gap H that leaves between the rear end outer wall of spring housing 8 and the solid needle guard 7 is 5mm, and the needle point of pin 6 is 1mm apart from the horizontal range of syringe needle end cap 12 front end outer walls.The data that distance described herein is this utility model ampoule when injecting.
The ampoule of continuous injector is generally a cylindrical shell, open rearward end, inside be one can free-moving piston, the piston nose groove is embedded with sealing ring, can push the liquid in the ampoule when piston moves ahead like this.The ampoule side has one to inhale the medicine interface, inhales the medicine interface and receives a suction medicine joint, and inhaling the medicine joint is a check valve in essence, one-way valve opens when piston moves backward, and liquid is inhaled into ampoule by inhaling the medicine interface.The front end of ampoule is a fluid joint, and inhaling the medicine joint also is a check valve in essence, and squeezed fluid was known from experience the spool of pushing open in the fluid joint when piston moved ahead, and allowed liquid go out to spill out from the opening of fluid joint front.Like this, when piston moved backward, the valve closing of fluid joint was inhaled the valve open of medicine interface, and liquid sucks ampoule, and the valve open of piston fluid joint when moving ahead, and inhaled the valve closing of medicine interface, and liquid spills out from fluid joint front end.When power strengthens, when piston moves ahead fast, can form injection stream.
This utility model inserts a small syringe needle (comprising pin 6 and needle stand 5) at fluid joint 2 front ends, and needle stand 5 inserts the outstanding interface of fluid joint 2 front ends.The solid needle guard 7 that there is a through hole inside is by being threaded onto the boss of ampoule front end, and the needle stand of syringe needle partly is pressed to the interface of fluid joint 2.Gu spring housing 8 of needle guard 7 outside sockets.There is a spring 10(with certain rigidity to be preferably wind spring between spring housing 8 and the solid needle guard 7).Gu the front end of needle guard 7 is by the catch 11 that is threaded, this catch 11 is fixed on solid needle guard 7 outsides with spring housing 8, and by spring housing 8 spring 10 of the inside is pushed down, and certain precompressed amount is arranged.Spring housing 8 is connected with a syringe needle end cap 12 by being threaded again.Syringe needle end cap 12 is provided with pin hole 13, and the pin 6 of syringe needle can stretch out by the pin hole 13 of syringe needle end cap 12.Gapped H between the boss of spring housing 8 and solid needle guard 7 rear ends, syringe needle end cap 12 and spring housing 8 can slide into the boss close-fitting with solid needle guard 7 rear ends under the pressure of spring 10, the pin 6 of syringe needle will stretch out in the pin hole 13 of syringe needle end cap 12 like this.
Change whole ampoule for convenience, piston 4 rear ends in the ampoule offer an internal thread hole, one end of piston rod 14 is threaded with the internal thread hole of piston 4, the other end of piston rod 14 is connected to by coupling cover on the power push-rod of propelling device 17, and coupling cover is identical with aforementioned patent with power push-rod and other parts.Whole ampoule is inserted in the endoporus of ampoule cover 15, and is pressed to ampoule cover 15 by an ampoule fixed cover 16 that is enclosed within ampoule housing 1 rear end.Ampoule fixed cover 16 is screwed onto on the external screw thread of ampoule cover 15 by screw thread.
In conjunction with shown in Figure 2, this utility model and Needleless injection system propel device 17 in conjunction with after operation principle be:
From the intact action of firm injection, the actuating unit driven plunger of propelling in the device 17 4 retreat, and piston 4 is sucked into the medicinal liquid in the Drug Storage in the ampoule chamber by suction medicine joint 3 in the process that retreats.During injection, syringe needle end cap 12 with the ampoule head slightly firmly props up animal skin earlier, pin 6 can stretch out from the pin hole 13 of syringe needle end cap 12 and thrust animal skin, and the overhang of pin 6 is that the needle point of gap H and pin 6 is apart from the difference of the horizontal range of syringe needle end cap 12 front end outer walls.(about 4mm has just punctured the thickness of the cutricular plate of larger animal such as pig).Pull the injection switch of propelling device 17 then, the actuating unit driven plunger of propelling in the device 17 4 moves ahead fast, and the spout of medicinal liquid from the pin 6 of ampoule ejected, and finishes a shot.When ampoule was separated with animal skin, syringe needle end cap 12 and spring housing 8 were got back to original position under the effect of the elastic restoring force of spring 10, and pin 6 is retracted in the syringe needle end cap 12.
Above-described embodiment only is used for explaining inventive concept of the present utility model, but not to the restriction of this utility model rights protection, allly utilizes this design that this utility model is carried out the change of unsubstantiality, all should fall into protection domain of the present utility model.