摘要:
An injection device includes an elongate housing (10), a syringe (12) disposed in the housing, and an internal piston (20) to express a dose from a needle (16) at its front end. The injection device further includes a shroud element (24) movable forwardly relative to the syringe to shroud the needle after use and a latch (74) movable between a latched state in which it restricts rearward movement of the shroud element, and a release state. The latch is moved to its latch state by a magnetic force (56).
摘要:
An injection device includes an elongate housing (10); a syringe (12) disposed in the housing and having an internal piston (20) to express a dose from a needle (16) at its front end; a trigger device (52) for, in use, activating the internal piston, and a cap (66) that, in a fitted configuration, fits over at least part of the elongate housing and prevents activation of the trigger device.
摘要:
An injection device for use with a syringe having a syringe body, a needle coupled thereto, and a plunger moveable through the body to eject medication from the syringe through the needle, includes a housing defining an inner space for holding a syringe and facilitating movement thereof from a first position in which the needle is contained fully within the housing and a second position in which the needle projects from the housing, and a drive member located within the inner space so that in use the drive member can engage the plunger of a syringe held within the housing. The device further includes a force applicator located within the inner space for providing a force to the drive member so as to move the syringe from the first to the second position and thereafter to move the plunger through the syringe body, a trigger mechanism, and a damper.
摘要:
An injector apparatus includes a housing (101, 102) for a cartridge or syringe, a plunger (40) for cooperating in use with the cartridge or syringe to express successive doses, a dose setting arrangement (16, 20) to select a dose volume, and a drive mechanism (22, 24) releasable to advance the plunger in respective predetermined increments of magnitude to express the successive doses. The drive mechanism includes a drive spring (22) for imparting movement directly or indirectly to the plunger (40), and the dose setting arrangement includes a dose setting element (16) moveable in a dose setting routine to define a magnitude of an increment of movement of the plunger for a given dose. The drive mechanism further includes a clutch arrangement (56) operable during the dose setting routine to inhibit forward movement of the plunger and/or to isolate the dose setting element from the force of the drive spring.
摘要:
An injection device includes an elongate housing (10); a syringe (12) disposed in the housing and having an internal piston (20) to express a dose from a needle (16) at its front end; a trigger device (52) for, in use, activating the internal piston, and a cap (66) that, in a fitted configuration, fits over at least part of the elongate housing and prevents activation of the trigger device.
摘要:
A needle shroud assembly for a syringe holder comprises a barrel (16), a needle shroud (24) captively telescoped relative to the forward end of the barrel (16) and retained by a top outer body (44). A locking ring (42) cooperates with the shroud, having diametrically opposed keyways which are brought into and out of axial alignment with keys (38) on the shroud (24) to free or lock the shroud from movement. The locking collar (42) is biased towards a ‘safe’ position. On cocking the locking ring (42) to a ‘live’ position the shroud (24) is freed for retraction movement but on return to its extended position, the locking ring is returned to its ‘safe’ position.
摘要:
An autoinjector includes a housing for receiving in use in a generally longitudinal loading direction a syringe assembly including a syringe carrier and a syringe, the syringe including a syringe body having a slideable internal piston for expressing a dose contained in the body through a needle at a forward end thereof; a drive mechanism for providing drive for operation of the autoinjector and being disposed generally within the housing and including a mechanical energy source and a winder element for being rotated to charge the energy source, and an input transmission train operational between the syringe assembly and the winder element in use, whereby loading of the syringe assembly into the housing rotates the winder element to charge the energy source.
摘要:
An injection device includes an injection complete indicator which includes its own bias and which is latched into a retracted position as the injection device is cocked. Upon firing the injection device, the injection complete indicator is kept in its retracted position until towards the end of the forward stroke of the drive mechanism, whereupon the injection complete indicator is unlatched and shoots forwardly under the influence of the bias to impact an abutment to generate an audible/tactile indication along with a visual indication.
摘要:
In an injection device a rotary indicator element (20) indexes angularly between a pre-firing position to an injection complete position to create a visual and audible/tactile signal as the drive plunger (28) arrives at or near its fired position. The indicator element (20) has a saw tooth profile which co-operates with respective abutments (34, 40) on the plunger and a housing part of the device to control and energise indicator movement.
摘要:
An injection device includes a housing for receiving a syringe or cartridge for containing a medicament; a rotary driveshaft mounted for rotation relative to the housing; and an elongate coiled torsion spring having respective formations at opposite ends thereof, with a first formation being anchored in a seat on the rotary drive shaft and a second formation being anchored in a seat on a reaction component. In use relative rotation of the rotary driveshaft and the reaction component in one angular direction strains the torsion drive spring, and release of the strained torsion drive spring causes expression of medicament from the syringe or cartridge. The torsion spring is longitudinally resiliently compressible between its end formations whereby during assembly of the injection device, the torsion spring may be longitudinally compressed and then rotated, thereby urging the end formations of the torsion drive spring into engagement with the respective seats.