CN105498049A - Medical injector with ratchet type plunger - Google Patents
Medical injector with ratchet type plunger Download PDFInfo
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- CN105498049A CN105498049A CN201610042183.2A CN201610042183A CN105498049A CN 105498049 A CN105498049 A CN 105498049A CN 201610042183 A CN201610042183 A CN 201610042183A CN 105498049 A CN105498049 A CN 105498049A
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- China
- Prior art keywords
- plunger
- actuator
- medical injector
- activator portion
- relative
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31525—Dosing
- A61M5/31526—Dosing by means of stepwise axial movements, e.g. ratchet mechanisms or detents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
- A61M5/31595—Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M2005/3125—Details specific display means, e.g. to indicate dose setting
Abstract
A medical injector comprises a body and a plunger. The body is provided with a far-side end and a near-side end, and the plunger is movably arranged in the body. The plunger comprises multiple spaced ratchets which are arranged in the length direction of the plunger. The plunger selectively moves a plug to distribute agentia from the medical injector. The medical injector further comprises a graduator, an actuator and a rotating part; the graduator is arranged in the body and used for jointing the plunger to allow the plunger to move towards the far side and basically prevent the plunger from moving towards the near side; the actuator is provided with a jointing portion which is used for jointing the plunger to allow the actuator to move towards the near side relative to the plunger and basically prevent the actuator from moving towards the far side relative to the plunger; the rotating part is used for enabling the jointing portion to move towards the near side relative to the plunger and the body.
Description
The divisional application that the present invention is international filing date is on March 17th, 2011, international application no is PCT/US2011/000493, China national application number is 201180070446.6, denomination of invention is the application for a patent for invention of " medical injector with ratchet-type plunger ".
Technical field
The present invention relates to packaged type medical injector plunger, more particularly, the present invention relates to ratchet-type medical injector plunger.
Background technology
Medical injector is known in the art, and these medical injectors comprise syringe and pen type infusion appliance.Medical injector typically comprises plunger, and this plunger is used for when delivery of medicaments one or more stopper is advanced during injecting.Although it is known in the art that syringe plunger is provided with tooth or further feature, to prevent the retraction after initial injection and to re-use, syringe plunger activated typically via the direct applying of straight line force.Dosage size is the direct function of plunger displacement.Controlled will be difficult to the straight-line displacement of plunger, thus caused the size being difficult to control dose.
About pen type infusion appliance, be provided with leading screw or rotary type plunger, this leading screw or rotary type plunger are mechanically connected on dosage setting button or other actuator by a series of mechanical connection.Typical pen type infusion appliance mechanism is quite complicated, and comprises multiple part matched.Using with being easy in order to cost-saving, desirably, the quantity of working part being minimized.
Summary of the invention
Correspondingly, one aspect of the present invention is to provide a kind of plunger for medical injector, this plunger controllably can be advanced with the part matched of minimum number.
Above-mentioned and/or other side of the present invention also realizes by providing a kind of medical injector, and this medical injector comprises body and plunger, and this body has distal end and proximal end, and this plunger is movably disposed within body.Plunger comprises the multiple isolated ratchet arranged along its length.Plunger is moving plug optionally, to divide dose out powders from described medical injector.Medical injector also comprises: indexer, is arranged in body, in order to engagement pistons, to allow that plunger distad moves and substantially prevents plunger proximad from moving; Actuator, has bonding part, allows that actuator moves relative to plunger proximad and substantially prevents actuator from distad moving relative to plunger with engagement pistons; And rotatable parts, be used for relative to plunger and body, bonding part proximad being moved.When actuator moves to SBR relative to body proximad, one or more ratchet crosses bonding part, moves relative to plunger proximad to make actuator.When actuator distad moves from SBR relative to body, actuator engages one or more ratchet, plunger is distad moved relative to indexer, divides dose out powders to make stopper distad move from medical injector.
Above-mentioned and/or other side of the present invention also realizes by providing a kind of medical injector, and this medical injector comprises body and plunger, and this body has distal end and proximal end, and this plunger is movably disposed within body.Plunger comprises the multiple isolated ratchet arranged along its length.Plunger is moving plug optionally, to divide dose out powders from medical injector.Medical injector also comprises indexer, and this indexer is arranged in body, in order to engagement pistons, to allow that plunger distad moves and substantially prevents plunger proximad from moving.Medical injector comprises actuating device in addition, this actuating device is used for activating medical equipment, actuating device has engagement device, and this engagement device is used for engagement pistons, to allow that actuating device to move relative to plunger proximad and substantially to prevent actuating device from distad moving relative to plunger.In addition, medical injector comprises tumbler, and this tumbler is used for relative to plunger and body, engagement device proximad being moved.When actuating device moves to SBR relative to body proximad, one or more ratchet crosses engagement device, moves relative to plunger proximad to make actuating device.When actuating device distad moves from SBR relative to body, actuating device engages one or more ratchet, plunger is distad moved relative to indexer, divides dose out powders to make stopper distad move from medical injector.
Above-mentioned and/or other side of the present invention also realizes by providing a kind of method from medical injector injection medicament, and this medical injector has body, and this body has distally and proximal end.The method comprises following operation: allow plunger distad moving relative to body, and substantially prevents plunger from moving relative to body proximad; And allow that actuator moves relative to plunger proximad and substantially prevents actuator from distad moving relative to plunger.The method also comprises following operation: rotated by rotatable parts, so that actuator is moved to SBR relative to body proximad, make actuator move relative to plunger proximad thus; And actuator is distad moved from SBR relative to body, engagement pistons thus, and plunger is distad moved relative to body, and divide dose out powders from medical injector.
Of the present invention in addition and/or other side and advantage will partly describe in the de-scription, and will partly to be described in detail by reading and more obvious, or can by being put into practice the present invention and understanding.
Accompanying drawing explanation
The following detailed description of being undertaken by connection with figures, the above and/or other side of each embodiment of the present invention and advantage are incited somebody to action more obvious and are more prone to cognitive, in the drawings:
Fig. 1 is the axonometric chart of the medical injector according to one embodiment of the present of invention;
Fig. 2 is can for the axonometric chart of the plunger of the syringe of Fig. 1;
Fig. 3 is the partial cross sectional view obtained along the line 3-3 of Fig. 2;
Fig. 4-6 is body portion sectional views, shows the operation of the medical injector of Fig. 1;
Fig. 7 and 8 is axonometric charts, and respectively illustrating can for two of the syringe of Fig. a kind of rocking bar;
Fig. 9-11 is body portion sectional views, shows the operation of the medical injector according to one embodiment of the present of invention of the rocking bar using Fig. 7;
Figure 12 and 13 is body portion sectional views, shows the use of the multi link formula rocking bar according to one embodiment of the present of invention;
Figure 14 is can for the dose counter of one embodiment of the present of invention;
Figure 15 be can for the plunger of Fig. 2 can the partial perspective view of pivoted actuator;
Figure 16 and 17 is body portion sectional views, and what show Figure 15 can the use of pivoted actuator;
Figure 18 is the sectional view of the medical injector according to another embodiment of the present invention;
Figure 19 is the axonometric chart of an embodiment of the Part II of the actuator of the medical injector of Figure 18;
Figure 20 is the phantom of the medical injector of Figure 18;
Figure 21 and 22 shows some embodiments selected of the groove of the Part II of Figure 19;
Figure 23 is the axonometric chart of another embodiment of the Part II of the actuator of the medical injector of Figure 18;
Figure 24 is the axonometric chart of the body of the medical injector of Figure 18;
Figure 25 is the axonometric chart of another embodiment of the Part II of the actuator of the medical injector of Figure 18;
Figure 26 is the partial perspective view of the medical injector of Figure 18, and this medical injector has the Part II of Figure 25;
Figure 27 shows another embodiment of the groove of the Part II of Figure 19;
Figure 28 is the axonometric chart of the medical injector according to another embodiment of the present invention;
Figure 29 is the axonometric chart of the actuator of the medical injector of Figure 28 and an embodiment of rocking bar;
Figure 30 and 31 is axonometric charts of the body of the medical injector of Figure 28;
Figure 32 and 33 is axonometric charts of the knob of the medical injector of Figure 28; And
Figure 34 is the phantom of restriction rib, and this restriction rib is used for preventing dosage setting value from exceeding available amount.
Detailed description of the invention
Now with detailed reference to each embodiment of the present invention, the example of these embodiments is shown in the drawings, and wherein, corresponding Reference numeral refers to corresponding element from start to finish.The embodiments described herein is illustrated the present invention by referring to accompanying drawing, instead of is limited the present invention.As will be understood by those skilled in the art, such as upper and lower, bottom and top and so on term is relative property, to contribute to explaination, instead of restrictive.
With reference to accompanying drawing, illustrated therein is medical injector 10, this medical injector 10 is provided with the plunger 12 that can add ratchet.As the skilled person will recognize, medical injector 10 can have various forms, comprises syringe or pen type infusion appliance.According to embodiments of the invention, medical injector 10 is suitable for application to few a kind of fixed dosage especially well, and is suitable for even better using a series of fixed dosage.Medical injector 10 can construct by any known mode, to adapt with plunger 12 as described herein.Medical injector 10 can comprise the reservoir 14 for holding injectable medicament, and this reservoir 14 can be drug cartridge tank, or this reservoir 14 can be formed directly in medical injector 10.Reservoir 14 can have one or more stopper associated with it, as known in the art.Medical injector 10 also can be provided with the pin 18 for injecting, and this pin 18 can removably link or be attached on medical injector 10, such as, form " column " and arrange.
Plunger 12 is elongated, and is general flat.Multiple isolated ratchet 20 is arranged along the length of plunger 12.In a kind of preferred arrangements, plunger 12 comprises plate shape body 22, and this plate shape body 22 has the first relative front and the second front 24,26.Ratchet 20 is arranged on the first front 24, and in another kind of preferred arrangements, is also arranged on the second front 26.Preferably, the ratchet 20 on the first front and the second front 24,26 is axially aimed at along the length of plunger 12.
Ratchet 20 is configured so that plunger 12 can carry out one-way movement.Specifically, with reference to Fig. 3, ratchet 20 is preferably zigzag, has inclined surface 28 and shoulder stopper section 30.As shown in Figure 3, the inclined surface 28 of the ratchet 20 on the first front and the second front 24,26 is oriented, facing on identical general direction.Shoulder stopper section 30 preferably laterally extends from the first front and the second front 24,26 by substantially vertical orientation.
Plunger 12 also can have one or more guide rail 27 extended from the first front 24 and/or the second front 26.Guide rail 27 can be formed as, and is passed in the notch matched of one or more correspondingly-shaped formed in medical injector 10 and slides.Guide rail 27 can provide stability during use, particularly during the translation of plunger 12.
With reference to Fig. 4-6, plunger 12 is arranged in the body 32 of medical injector 10.Body 32 comprises distal end 34 and proximal end 36, and this distal end 34 is arranged to point to patient during injecting, and this proximal end 36 is arranged to during injecting away from patient (Fig. 1).During use, medical injector 10 is configured so that plunger 12 can uniaxially motion in the distal direction of distally end 34 wherein, but can not move in the proximal direction towards proximal end 36.In order to be conducive to such one-way movement, be provided with at least one indexer 38, this indexer 38 is formed as in order to engagement pistons 12.Indexer 38 is configured so that plunger 12 can towards distal end 34 distal motion of body 32, but can not towards proximal end 36 proximal motion of body 32.
Indexer 38 comprises deflection pawl 40, and this deflection pawl 40, as schematically illustrated in figure 3, comprises the stop surfaces 44 that inclined abutment surface 42 dough-making powder is outside.Indexer 38 can outwards bend, with when plunger 12 is relative to allowing during its distal motion that the inclined surface 28 of composition surface 42 along each ratchet 20 rises.When distal motion during sufficient amount, ratchet 12 crossed by indexer 38, and under the intrinsic elasticity of indexer 38, to internal gearing, thus stop surfaces 44 is aimed at shoulder stopper section 30.Preferably, stop surfaces 44 is formed as roughly paralleling with shoulder stopper section 30.When (proximad) moves plunger 12 backward, shoulder stopper section 30 and stop surfaces 44 engage interferingly, thus prevent plunger 12 proximal motion.In a preferred embodiment, be provided with a pair indexer 38, thus abut against the ratchet 20 be arranged on both the first front and the second front 24,26 and work, as Figure 4-Figure 6.Further preferably, be provided with a pair indexer 38, this aims at vertically to indexer 38, thus will provide the clamping effect for plunger 12.This clamping effect can provide stable retentivity for plunger 12.
Indexer 38 can be formed as, and by means of intrinsic elasticity, as the selection (such as, being formed by thermoplastic) by means of material, and has flexibility.In addition, or selectively, indexer 38 can comprise suspension arm 46, and this suspension arm 46 makes the pawl 40 be connected to bend.Indexer 38 is formed as, and have natural, not biased state as Figure 4-Figure 6, wherein, indexer 38 is positioned to work in order to the shoulder stopper section 30 against ratchet 20.Suspension arm 46 is formed with enough memory internals, to be provided for the non-bias state of indexer 38.
Medical injector 10 also comprises actuator 48, and this actuator 48 has bonding part 50, and this bonding part 50 is in order to engage one or more ratchet 20.Bonding part 50 preferably includes engaging claw 52, and this engaging claw 52 has the outside stop surfaces 56 of inclined abutment surface 54 dough-making powder, similar with the structure of pawl 40 described above.Preferably, be provided with two bonding parts 50, these two bonding parts 50 are arranged on the first front and the second front 24,26.
With reference to Fig. 4, plunger 12 is positioned to engage in each stopper 16.In order to cause the actuating of medical injector 10, as shown in Figure 5, actuator 48, to SBR motion, makes bonding part 50 proximal motion.Indexer 38 prevents plunger 12 proximal motion, thus allows actuator 48 relative to plunger 12 proximal motion.When plunger 12 keep static and bonding part 50 relative to plunger 12 proximal motion, one or more ratchet 20 is crossed in bonding part 50.Actuator 48 is moved fully, to reach SBR.
In order to the actuating of medical injector 10, actuator 48 is moved from SBR, make bonding part 50 distal motion.Bonding part 50 engages one or more ratchet 20, is especially for use in the interference engagement between shoulder stopper section 30 and stop surfaces 56.Specifically, bonding part 50 engages contiguous distally ratchet 20.The distal motion of bonding part 50 makes plunger 12 with its distal motion.The distal motion of plunger 12 causes again stopper 16 distad to advance, and an implantation dosage is applied.Ratchet 20 can cross indexer 38 in a distal direction.
Until the dosage size used by medical injector 10 be interval between ratchet 20 and/or when actuator 48 moves to SBR bonding part 50 relative to the function of the proximad amount of movement of ratchet 20.In order to produce fixed dosage, one or more key 58 can be limited on medical injector 10 and/or actuator 48, one or more key 58 described is formed as being nested in respective channel 60, and slide along respective channel 60, these respective channel 60 are formed in medical injector 10 and/or actuator 48.As Figure 4-Figure 6, preferably, key 58 is formed on actuator 48, and passage 60 is formed in medical injector 10.With reference to Fig. 4, key 58 before the use, at the distal end place of passage 60.When actuator 48 proximad moves, key 58 proximad in passage 60 proceeds to the recent side position corresponding with the SBR of actuator 48.The range of movement of the length limiting actuator 48 of the stroke of key 58 in passage 60 is to limit the dosage size can used by medical injector 10.As illustrated in Figures 5 and 6, key 58 distad proceeds to farthest side position with actuator 48 during use.
Actuator 48 is in figs. 4-6 rectilinearly-moved slide type actuators, and power is applied directly on plunger 12 by this rectilinearly-moved slide type actuator.As the skilled person will recognize, actuator 48 can have various structure.With reference to Fig. 7-8, actuator 48 can comprise the rocking bar 62 be pivotally mounted on it.Rocking bar 62 is frame shapes, has first end 64 and the second opposed end 66, and this first end 64 is used for pivotable and is installed on actuator 48, and this second opposed end 66 is used for pivotable and is installed on medical injector 10.Bonding part 50 is arranged between first end and the second end 64,66.As shown in FIG. 7 and 8, two bonding parts 50 can be provided with, with ratchet 20 combined effect on the first front and the second front 24,26.
Note, the power transmission of interval impact from actuator 48 to plunger 12 between first end and the second end 64,66, particularly produces torque.Interval L between first end and the second end 64,66 and bonding part 50, from interval S1, S2 of first end and the second end 64,66, affect torque and how to produce and to be delivered to plunger 12.
With reference to Fig. 9, shown actuator 48 is before initial use under state, and rocking bar 62 distad tilts.With reference to Figure 10, actuator 48 proceeds to SBR, rocking bar 62 by means of the rotation around the second end 66 proximad pull, thus to tilt in a proximal direction.Between this moving period, bonding part 50 is pressed and same way described above, crosses one or more ratchet 20.As shown in figure 11, actuator 48 moves from SBR, to cause the actuating of medical injector 10.Leave the movement of SBR by means of actuator 48, rocking bar 62 is distad advanced around the second end 66, make bonding part 50 also cause plunger 12 distad to advance.Dosage size can be arranged by key 58/ passage 60 described above and/or both range of movement of rocking bar 62 limit.
As the skilled person will recognize, rocking bar 62 can directly be connected on actuator 48, as shown in figs. 9-11.As the skilled person will recognize, multi link is arranged and rocking bar 62 can be used for be connected on actuator 48.With reference to Figure 12 and 13, one or more connecting rod 68 can be connected between rocking bar 62 and actuator 48, to be provided for the power of its movement.Connecting rod 68 can utilize any arrangement that power can be delivered to rocking bar 62 from actuator 48.As shown in Figures 12 and 13, utilize two connecting rods 68 (68A, 68B), connecting rod 68A be pivotably connected on actuator 48 and be pivotably connected on connecting rod 68B, and connecting rod 68B be pivotably connected on connecting rod 68A and be pivotably connected on rocking bar 62.Power is delivered to rocking bar 62 by connecting rod 68A, 68B synergistically.
With reference to Figure 15-17, actuator 48 can be arranged to are nonlinearly to move.As seen in figs. 15-17, can be formed as can around fulcrum 70 pivotable for actuator 48.When actuator 48 pivotable outside around fulcrum 70 from medical injector 10, bonding part 50 proximad is moved.On the contrary, actuator 48, around the inside pivotable of fulcrum 70, makes bonding part 50 distad move.Bonding part 50 is pressed and same way described above and plunger 12 combined effect.
With reference to Figure 15 and 16, shown medical injector 10 is before use under state.The conveniently manipulation of actuator 48, can provide and grasp ring or pad 72, this grasping ring or pad 72 extend radially outwardly from medical injector 10, to be conducive to the movement of actuator 48.In order to prepare to use, as shown in by arrow in figure 16, actuator 48 is made to be pivoted to SBR, as shown in figure 17.In order to cause the actuating of medical injector 10, make actuator 48 from the inside pivotable of SBR, as shown in by arrow in fig. 17.
The size of dosage can be fixed by the slewing area of limiting actuator 48 with pivotable actuator 48.A part 74 for medical injector 10 can be configured to rotation (the particularly outwards rotating) scope in order to limiting actuator 48, and such limited field is corresponding with SBR.
Actuator 48 can be formed as linear slide actuator, but is constructed to be permeable to accept nonlinear force, so that actuator 48 is adjusted to SBR.With reference to Figure 18-27, actuator 48 can comprise Part I 48A, and this Part I 48A as described above is formed.In addition, actuator 48 can comprise rotating Part II 48B, and this rotating Part II 48B is connected on Part I 48A, thus can rotate relative to it.This layout allows that actuator 48 is adjusted to SBR by rotation.Rotate the feature adjusting pen type infusion appliance typically, and may be preferred for some user.
Part II 48B can be touched from the outside of medical injector 10, thus can by user from outer side engagement; Specifically, Part II 48B extends from proximal end 36 proximad of body 32.Part I and Part II 48A, 48B connect rotationally by any known way.As limiting examples, Part II 48B can be formed with continuous loop 80, and this continuous loop 80 is sat and put in the passage 82 of Part I 48A.The size and dimension of ring 80 is configured to freely to rotate in passage 82, make Part I and Part II 48A, 48B fixing vertically thus together with move.As the skilled person will recognize, ring 80 and passage 82 can reverse arrangement on Part I and Part II 48A, 48B.
As shown in figure 19, groove 84 is formed around the outside of Part II 48B.One or more key 86 is arranged on peripheral part of medical injector 10, such as, be arranged on the body 32 of Part II 48B, and position and the size of one or more key 86 described are set to be sitting in groove 84, thus can along its length motion.The length of groove 84 defines the degree of rotation of Part II 48B.According to an embodiment, groove 84 be spiral at least partially, thus there is helix shape.As persons skilled in the art will recognize, one or more key 86 can be arranged on the outside of Part II 48B, and the groove 84 of correspondence can be formed on peripheral part of medical injector 10.
The rotation of Part II 48B in the first rotation direction causes Part I and Part II 48A, 48B proximad to move, make bonding part 50 accordingly proximad move to SBR.Specifically, the rotation of Part II 48B causes its proximad to move, and as one man causes Part I 48A and bonding part 50 proximad to move.Part I 48A non-rotatingly proximad moves.The degree of rotation of the length restriction Part II 48B of groove 84, limits the dosage that can use thus.Once turn to setting dosage, just can application dosage by pressing Part II 48B, this causes Part II 48B distad to advance, and causes Part I 48 distad to advance non-rotatingly together with bonding part 50 accordingly.
About the distad advance of Part II 48B, preferably, Part II 48B front and then not rotation point-blank.For this reason, preferably, groove 84 is formed with the first spiral section 84a and the second axial component 84b, and this second axial component 84b extends from the first spiral section 84a, roughly parallels with the longitudinal axis of Part II 48B.With reference to Figure 21, about this layout, one or more key 86 passes the first spiral section 84a in a proximal direction by means of the rotation of Part II 48B.Elbow curved 88 is limited to the joint of the first spiral section 84a and the second axial component 84b, the curved 88 restriction degree of rotation of this elbow, and the proximad thus limiting Part II 48B moves.Elbow curved 88 limits the ready position of actuator 48.In order to activate, Part II 48B is pressed, and at one or more key 86 through being caused point-blank distad front and then not rotation during the second axial component 84b.This causes again the distad advance of distad advancing of Part I 48A and plunger 12 by the joint with bonding part 50.The rectilinear movement of Part II 48B allows that the power on it that is applied to fully is transmitted on an axial direction, and need not resolve into two or more components.Like this, be applied to whole actuation force on Part II 48B and be all delivered to actuator 48.
For the single dosage pattern of this layout, the first spiral section and second axial component 84a, 84b composition single group can be utilized.For multiple dosage, as shown in figure 22, groove 84 can extend into, and auxiliary screw shape part 84a ' can directly extend from the end of the second axial component 84b, and it extends in auxiliary axial component 84b ', and the rest may be inferred according to actual needs, and ground is arranged.According to an embodiment, the series that the first spiral section 84a and the second axial component 84b is formed can limit around Part II 48B, continuously to be conducive to forming multiple dosage.According to an embodiment, corresponding group about one or more key 86 can utilize more than one groove 84.And, on the Part II 48B that one or more groove in each groove 84 and one or more key in each key 86 can be arranged in medical injector 10 and/or peripheral part.
Preferably, Part II 48B should be avoided along rotating backward.For this reason, as shown in figs. 23-24, one or more ratchet 90 can be formed on Part II 48B, it is formed as in order to one or more placed channel 92 of engagement in snap engagement, one or more placed channel 92 described is formed on medical injector 10 around Part II 48B, as being formed on body 32.Preferably, placed channel 92 is arranged to corresponding in ready position with Part II 48B, and a kind of like this ready position placed channel 92 is elongated, thus ratchet 90 can be mobile during dosage be used with Part II 48B along its length.As the skilled person will recognize, ratchet 90 (one or more) can be formed on medical injector 10, and placed channel can be formed on Part II 48B.
In addition, along the reverse axially-movable of the second axial component 84b, particularly after injection, be undesirably.For this reason, as shown in figs. 25 and 26, locking tab 94 is arranged on Part II 48B, this locking tab 94 be configured in order to inject position (position that the end such as, arriving the second axial component 84b with one or more key 86 in the end of dose stroke coincides) place's engagement in snap engagement of terminating to coincide in locking channel 96.Thus the axially-movable of Part II 48B is restricted.Locking channel 96 can be configured to, and the rotation by means of Part II 48B allows that locking tab 94 is rotated to be separated with locking channel 96, for preparing with post dose.Locking channel 96 is formed on peripheral part of medical injector 10, as being formed on body 32.As the skilled person will recognize, locking tab 94 can be formed on medical injector 10, and locking channel 96 can be arranged on Part II 48B.
In addition, as the skilled person will recognize, by means of the layout addressed above, particularly by means of the Part I of groove 84 and the use of Part II 84a, 84b, dosage is fixed dosage.According to the embodiment allowing variable dose, during the distad advance of Part II 48B, Part II 48B can be allowed to rotate, one or more key 86 is advanced along groove 84 simultaneously.Thus, in this embodiment, as shown in figure 27, the spiral section 84a that groove 84 is provided only is needed.About this layout, Part II 48B can turn to any position along groove 84 (84a), to set dosage by means of what allow dosage along rotating backward of groove 84 (84a).Scale known in the art or other mark can be arranged to corresponding with the rotation displacement of Part II 48B, to provide the instruction of setting dose value (doseamount).In order to limit rotating backward undesirably, and in order to remain on the position at setting dosage place, can utilize can release holding mechanism, as known in the art.
Part I utilizes together with any one feature in each feature described herein with Part II 48A, 48B.Preferably, Part I and Part II 48A, 48B and rocking bar 62 together use.
Figure 28 is the axonometric chart of the medical injector 10 according to another embodiment of the present invention.With reference to Figure 28-33, medical injector 10 comprises body 32, knob 100, actuator 48 and cap 101, and this knob 100 is pivotally connected on body 32, and this actuator 48 is arranged in body 32, and this cap 101 is connected on actuator 48.As shown in figure 29, actuator 48 comprises groove 84, as described above.Actuator 48 also comprises axial notch 102.Axial notch 102 and axial bond 104 interact (shown in Figure 30), and this axial bond 104 is arranged on the inside of body 32, to guide the axially-movable of actuator 48 relative to body 32, and prevents actuator 48 relative to the rotation of body 32.As the skilled person will recognize, axial notch 102 can be arranged on the inside of body 32, and axial bond 104 can be arranged on actuator 48, and does not depart from the scope of the present invention.
As shown in figure 31, body 32 also comprises the circumferential groove 106 being arranged in its proximal end place, for being connected with knob 100, as will be described in more detail.In addition, as will be described in more detail, body 32 comprise suspension, circumference arm 120, this arm 120 has denation 122, and this denation 122 is arranged in the end of arm 120, and radially outward gives prominence to.
Figure 32 is the axonometric chart of the distal end of knob 100, and Figure 33 is the axonometric chart of the proximal end of knob 100.As shown in figure 32, knob 100 comprises circumferentially and radially inwardly outstanding adapter 108.According to an embodiment, adapter 108 is approximate wedge shape.In order to assembling medical infusion appliance 10, knob 100 is distad inserted in the proximal end of body 32, until adapter 108 slides in the circumferential groove 106 of body 32, knob 100 is connected on body 32 by this.Knob 100 is fixed on body 32 by the wedge-type shape of adapter 108, substantially prevents knob 100 from moving relative to body 32 proximad, allows that knob 100 rotates relative to body 32 simultaneously.
As shown in figure 32, adapter 108 is arranged in the major diameter part 110 of knob 100.Also be arranged in the major diameter part 110 of knob 100 is triangular groove 112.Triangular groove 112 interacts with the denation 122 on arm 120, to allow that knob 100 rotates relative to body 32 uniaxially.In other words, triangular groove 112 and denation 122 interact, to allow that knob 100 only rotates along the direction making plunger 12 proximad advance.Knob 100 also has reduction diameter parts 114, after this reduction diameter parts 114 is connected between adapter 108 with circumferential groove 106, prevents knob from moving relative to body proximad.In addition, cam-shaped projection or key 116 are radially inwardly given prominence to from reduction diameter parts 114.Be similar to key 86 described above, key 116 interacts with the groove 84 of actuator 48, the rotational motion of knob 100 to be converted to the proximad axially-movable of actuator 48.After the axially-movable of actuator 48 proximad, thus user pressing cap 101 (being connected on actuator 48), with relative to body 32 distad movement actuator 48, and make plunger 12 distad advance.
With reference to Figure 33, knob 100 also comprises radially outstanding rib 118 at its proximal end place.Rib 118 plays the effect at user interface, holds and rotate knob 100 in order to allow user.
As the skilled person will recognize, the medical injector 10 with various feature can be utilized.With reference to Figure 12-14, can arrange dose counter about medical injector 10, this dose counter provides the instruction of the quantity of obtained dosage to be administered.Such as, a series of dosage indicator hole 76 can be formed in medical injector 10, specifically can from being seen outside it.In an example provided, pointer 78 can be arranged on actuator 48, and is formed as to be seen by the single hole in each dosage indicator hole 76.During use, along with plunger 12 1 dosage then a dosage (dosebydose) distad advance, pointer 78 is same along becoming the dosage indicator hole 76 of series to advance.According to an embodiment, the quantity being positioned at the dosage indicator hole 76 in the distally of pointer 78 provides the instruction of the quantity of doses remaining.With the pointer 78 appeared in the farthest side of dosage indicator hole 76, provide the instruction of " not being suitable for the doses remaining used ".
Preferably, pointer 78 is formed by the contrast color of the part be positioned near dosage indicator hole 76 relative to medical injector 10, thus easily sees pointer 78 through dosage indicator hole 76.
In addition, according to the embodiment of shown in Figure 34, outstanding restriction rib 98 can extend from the distal part of plunger 12, and this outstanding restriction rib 98 is arranged to arrange with the dosage on plunger 12 coincide, and this dosage arranges corresponding with the finally available medication amount in reservoir 14.Correspondingly, about the predetermined extent distad advanced of plunger 12, restriction rib 98 is formed as the part in order to engages actuator 48 interferingly, and stops by its proximal motion.In such a way, the dosage that actuator 48 sets can not be greater than the available quantity in reservoir 14.
Although illustrate and described only several embodiment of the present invention, the invention is not restricted to the embodiment described.On the contrary, those skilled in the art will recognize that, can not depart from the various changes of principle of the present invention and spirit for these embodiments, scope of the present invention is limited by claims and its equivalent.
Claims (9)
1. a medical injector, comprising:
Body, described body has distal end and proximal end;
Plunger, described plunger is movably disposed within described body, and described plunger has the multiple isolated ratchet arranged along its length, described plunger optionally moving plug, to divide dose out powders from described medical injector;
Indexer, described indexer is arranged in described body, in order to engage described plunger, to allow that described plunger distad moves and substantially prevents described plunger proximad from moving;
Actuator, described actuator has bonding part, and described bonding part allows that in order to engage described plunger described actuator moves relative to described plunger proximad and substantially prevents described actuator from distad moving relative to described plunger; And
Rotatable parts, described rotatable parts are used for relative to described plunger and described body, described bonding part proximad being moved;
Wherein, when actuator moves to SBR relative to described body proximad, one or more ratchet crosses described bonding part, moves relative to described plunger proximad to make described actuator; And
Wherein, when described actuator distad moves from described SBR relative to described body, described actuator engages one or more ratchet, described plunger is distad moved relative to described indexer, divides dose out powders to make described stopper distad move from described medical injector;
Wherein, described actuator comprises:
First activator portion, described bonding part is arranged on this first activator portion; And
Described rotatable parts, described rotatable parts comprise the second activator portion, and described second activator portion connects rotationally with described first activator portion;
Wherein, described second activator portion can move to described SBR rotationally, described first activator portion is made to move relative to described body proximad thus, and when described second activator portion moves to described SBR rotationally, one or more ratchet crosses described bonding part, moves relative to described plunger proximad to make described first activator portion and the second activator portion; And
Wherein, described second activator portion distad can move from described SBR relative to described body, distad and non-rotatingly move described first actuator thus, and when described second activator portion distad moves from described SBR, described bonding part engages one or more ratchet, and described plunger is distad moved, divides dose out powders to make described stopper distad move from described medical injector.
2. medical injector according to claim 1, wherein:
One in described second activator portion and described body has groove, and the another one in described second activator portion and described body has corresponding keys, and this corresponding keys is slidably received within described groove; And
Described key causes the movement of described second activator portion relative to the motion of described groove.
3. medical injector according to claim 2, wherein, described groove comprises roughly spiral section, and described key causes the rotation of described second activator portion relative to the motion of described spiral section.
4. medical injector according to claim 3, also comprises the mark that user can be seen, is used for setting required dosage when described key moves in described spiral section.
5. medical injector according to claim 3, wherein, described groove also comprises axial component, and described key causes described second activator portion to move vertically relative to the motion of described axial component, is used for described actuator is distad moved from described SBR.
6. medical injector according to claim 5, wherein, described groove comprises multiple spiral section, and described multiple spiral section is successively connected by multiple axial components of correspondence.
7. medical injector according to claim 1, wherein, one in described second activator portion and described body has placed channel, and the another one in described second activator portion and described body has corresponding ratchet, placed channel described in described ratchet engagement in snap engagement, to allow that described second activator portion is rotated in a first direction, and prevent described second actuator along rotating backward.
8. medical injector according to claim 5, wherein:
One in described second activator portion and described body has placed channel, and the another one in described second activator portion and described body has corresponding ratchet, placed channel described in described ratchet engagement in snap engagement, to allow that described second activator portion is rotated in a first direction and engages described ratchet, and prevent described second actuator along rotating backward; And
Described placed channel is axial slender, to allow that described second activator portion moves vertically.
9. medical injector according to claim 5, wherein, one in described second activator portion and described body has locking channel, and the another one in described second activator portion and described body has corresponding locking tab, this corresponding locking tab is in the position corresponding with the end of the administered from described medical injector, with described locking channel engagement in snap engagement, to prevent described second activator portion proximal motion non-rotatingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042183.2A CN105498049B (en) | 2011-03-17 | 2011-03-17 | Medical injector with ratchet-type plunger |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042183.2A CN105498049B (en) | 2011-03-17 | 2011-03-17 | Medical injector with ratchet-type plunger |
| CN201180070446.6A CN103501835B (en) | 2011-03-17 | 2011-03-17 | There is the medical injector of ratchet-type plunger |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180070446.6A Division CN103501835B (en) | 2011-03-17 | 2011-03-17 | There is the medical injector of ratchet-type plunger |
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| Publication Number | Publication Date |
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| CN105498049A true CN105498049A (en) | 2016-04-20 |
| CN105498049B CN105498049B (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610042183.2A Active CN105498049B (en) | 2011-03-17 | 2011-03-17 | Medical injector with ratchet-type plunger |
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| CN1607015A (en) * | 1997-11-18 | 2005-04-20 | 萨克哈拉姆D·马赫卡 | Single-use safety syringe |
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| CN105498049B (en) | 2018-09-21 |
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