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WO2025212544A9 - Mécanisme d'entraînement d'indice entraîné par came - Google Patents

Mécanisme d'entraînement d'indice entraîné par came

Info

Publication number
WO2025212544A9
WO2025212544A9 PCT/US2025/022390 US2025022390W WO2025212544A9 WO 2025212544 A9 WO2025212544 A9 WO 2025212544A9 US 2025022390 W US2025022390 W US 2025022390W WO 2025212544 A9 WO2025212544 A9 WO 2025212544A9
Authority
WO
WIPO (PCT)
Prior art keywords
ratchet
cam
combination
arm
conductive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/022390
Other languages
English (en)
Other versions
WO2025212544A1 (fr
Inventor
Andrew Beaupre
Scott Stewart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Becton Dickinson and Co
Original Assignee
Becton Dickinson and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Becton Dickinson and Co filed Critical Becton Dickinson and Co
Publication of WO2025212544A1 publication Critical patent/WO2025212544A1/fr
Publication of WO2025212544A9 publication Critical patent/WO2025212544A9/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A61M5/14248—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A61M5/14248—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type
    • A61M2005/14252—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type with needle insertion means
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M2005/14533—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons cam actuated

Definitions

  • exemplary embodiments of the present disclosure relate to the fields of medication delivery devices. More specifically, exemplary embodiments of the present disclosure relate to medication delivery devices where a stopper or plunger is advanced through a reservoir to dispense medication from the reservoir.
  • a patch pump is an integrated device that facilitates infusion therapy for diabetic patients.
  • a patch pump combines most or all of the fluidic components, including the fluid reservoir, pumping mechanism and mechanism for automatically inserting the cannula, in a single housing which is adhesively attached to an infusion site on the patient’s skin, and does not require the use of a separate infusion or tubing set.
  • a patch pump containing insulin adheres to the skin and delivers the insulin over a period of time via an integrated subcutaneous cannula.
  • Some patch pumps may be configured to include wireless communication with a separate controller device, while others are completely self-contained. Such devices are replaced on a frequent basis, such as every three days, particularly when the insulin reservoir is exhausted.
  • patch pumps are designed to be a self-contained unit that is worn by the diabetic patient, it is preferable to be as small as possible so that it does not interfere with the activities of the user. Thus, in order to minimize discomfort to the user, it would be preferable to minimize the overall size of the patch pump.
  • Conventional patch pumps or a syringe-type devices typically include a driving mechanism with a single advancing lead screw inside
  • a wearable disposable patch pump 100 can be configured to include a base 102, outer housing 104, and an insertion mechanism 106.
  • FIG. 1C illustrates a top view, of pump 100 without the outer housing or cover 104, and diagrammatically shows at least some of the various components that can be configured on base
  • a plunger assembly 210 is disposed inside barrel 212 such that plunger 210 translates or moves axially with respect to barrel 212 due to rotation of lead screw 204 whereby fluid can be dispensed by rotating the motor 202 forward driving the plunger 210 to move axially with respect to barrel 212 away from proximal end 213 and toward distal end 215 of barrel 212 forcing fluid out of the barrel outlet 107.
  • FIG. ID linkage mechanism
  • FIG. IE collapsible drive mechanism
  • a pumping device 900 which can be deployed for example hi a pump 100, can comprise a plunger 910 disposed in barrel 912, such that plunger
  • a collapsible drive mechanism can be advanced axially toward and away from distal end 915 of bar rel 912 by a two linkage mechanism 904 driven through appropriate gearing 920 by a motor (not shown) for example operatively connected at 921.
  • a collapsible drive mechanism As shown in FIG. IE, a collapsible drive mechanism
  • Tire linkage mechanism can comprise a single linkage or a set of two full linkages 1305 and 1306 and two half linkages 1307 and 1208, where distal ends of half linkages 1307 and 1308 can be joined at, or pivotally coupled to, plunger
  • plunger 1210 for example at proximal end 1415 of plunger 1210, for example via a loose pin 1420.
  • Proximal ends of half linkages 1307 and 1308 can be joined at, or pivotally coupled to, distal ends of respective full linkages 1305 and 1306, for example via respecti ve loose pins 1421 and
  • Full linkages 1305 and 1306 crisscross and can be joined, or pivotally coupled, essentially at the centers thereof, for example by means of a loose pin 1423.
  • Proximal ends of fiill linkages 1305 and 1306 are joined at, or pivotally coupled to, the driveshaft 1207 at opposing left 1302 and right 1301 hand female screw threads, respectively, for example by means of respective loose pins 1425 and 1424.
  • Exemplary embodiments of the present disclosure provide system components for a drug delivery device, such as a patch pump, can provide a pumping mechanism that, for example and without limitation, can be functional in a wider range of temperature settings, for example at higher temperatures, and can allow for a more compact design of various syringe driven pumps.
  • Exemplary implementations of embodiments of the present disclosure provide combinations of various feature of a drive mechanism including a ratcheting mechanism actuated using, for example a bi-directional, motor paired, for example, with a leadscrew driven syringe pump or a linkage dri ven syringe pump, for advancing a plunger to dispense the medium or fluid in a drag delivery device.
  • a drive mechanism including a ratcheting mechanism actuated using, for example a bi-directional, motor paired, for example, with a leadscrew driven syringe pump or a linkage dri ven syringe pump, for advancing a plunger to dispense the medium or fluid in a drag delivery device.
  • a system includes a syringe-style drug container, reservoir, or chamber containing a medium or fluid which can be dispensed by advancing a plunger disposed inside the container facing, or in contact with, or proximal to, the medium inside the container, and a double ratchet mechanism, for example a dual layer cam ratchet mechanism, disposed outside the container driven by a motor to advance the plunger to dispense the medium or fluid out of the container.
  • a double ratchet mechanism for example a dual layer cam ratchet mechanism
  • certain space savings and/or a more compact design of various syringe driven pumps can, but is not required to, be achieved by utilizing exemplary implementations of a mechanical drive mechanism that has, for example and without limitation, a parallel axial alignment between a ratcheVlead screw and a motor driver.
  • a motor may be arrange to take up the length of space adjacent to the syringe pump reservoir.
  • ratchet gear can be configure to contribute directly to functional increment tolerancing.
  • a cam driven index drive mechanism can be paired with a leadscrew driven syringe pump, where the cam driven index drive mechanism can offer, for example and without limitation, a safety feature when used in conjunction with a leadscrew driven syringe pump in that the mechanism can mitigate the possibility of a runaway fluid infusion in the event of an error state in which the driving motor is left running.
  • a ratchet advancement can be facilitated using a metal spring clip.
  • a cam follower and an element that puts tension on the cam follower can be implemented as a single component.
  • conversion of rotational to linear motion can be achieved using a cam surface driven with a bi-directional motor.
  • double acting spring arms can be used to replace a ratchet locking pawl.
  • Exemplary' implementations of embodiments of the present disclosure can utilize a used double-ratchet with offset gear teeth.
  • Exemplary' implementations of embodiments of the present disclosure can utilize variable thickness metal spring clip.
  • a leadscrew can be configures as either fused to a ratchet or interfaced as two separate components.
  • Figures 1 A and IB are examples of perspective views of an exterior of a device according to exemplary embodiment of the present disclosure.
  • Figures 1C, ID and IE are examples of perspective views of components of device configurations that can be optionally implemented with various configurations of exemplary embodiment of the present disclosure.
  • Figure 2A illustrates a top view of a combination of system components of a device according to exemplary embodiments of the disclosure.
  • Figures 2B, 3 and 4A diagrammatically illustrate views of combinations of system components according to exemplary embodiment of the present disclosure.
  • Figure 4B illustrates another top view of a combination of system components of a device according to exemplary embodiments of the disclosure
  • Figure 5 illustrates a detail of certain components of a device according to exemplary embodiments of the disclosure.
  • Figure 6 illustrates examples of various configurations of a components of a device according to exemplary embodiments of the disclosure.
  • Figure 7 A diagrammatically shows a perspective partial view of components according to exemplary implementations of embodiments of the disclosure.
  • Figure 7B diagrammatically shows a side partial view of components according to exemplary implementations of embodiments of the disclosure.
  • Figures 7C and 7D diagrammatically shows side views of components according to exemplary implementations of embodiments of the disclosure.
  • Figures 8A and 8B diagrammatically show perspective views of components according to exemplary implementations of embodiments of the disclosure.
  • Figures 8C and 8D diagrammatically show side views of components according to exemplary implementations of embodiments of the disclosure.
  • Figure 9 diagrammatically shows perspective views of components according to exemplary implementations of embodiments of the disclosure.
  • Figures 10A and 10B diagrammatically show perspective views of components according to exemplary implementations of embodiments of the disclosure.
  • Figure 11 illustrates in a block diagram an example of a configuration of design elements according to exemplary implementations of example disclosed embodiments.
  • Figure 12 illustrates in a block diagram an example of another configuration of design elements according to exemplary implementations of example disclosed embodiments.
  • Figure 13 diagrammatically shows a perspective view of components according to exemplary implementations of embodiments of the disclosure.
  • Figure 14 diagrammatically shows a side partial view of components according to exemplary implementations of embodiments of the disclosure.
  • Figures 15A and 15B diagrammatically show perspective views of components according to exemplary’ implementations of embodiments of the disclosure.
  • Exemplary embodiments of the present disclosure provide systems, devices, components, and methodologies comprising, without limitation, various design of a ratcheting mechanism, for example driven by a back-and-forth rotation of a motor such as a bi-directional motor.
  • FIG. 2A illustrates in a conceptual block diagram a top view of internal component configuration according to an exemplary embodiments of the present disclosure that can be implements for example and without limitation in a wearable disposable patch pump, such as a pump 100.
  • a wearable disposable patch pump such as a pump 100.
  • the various components that can be configured on a base, or a structure, 2000 include a motor 2002 operatively connected to lead screw 2004 by a cam driven ratchet mechanism 2010 configured to rotate lead screw 2004.
  • a portion of lead screw 2004, such as a portion comprising lead screw gear 2008, can be configured outside of barrel 2012 in order to operationally connect lead screw 2004 to motor 2002.
  • a reservoir/pump assembly 2012 can include a plunger 3005 disposed inside a barrel 2012 such that the plunger translates or moves axially with respect to the barrel due to rotation of lead screw 2004 whereby fluid can be dispensed by rotating the motor 4006 driving the plunger to move axially with respect to the barrel, away from its proximal end and toward its distal end forcing fluid out of the barrel outlet.
  • mechan ism 2010 can be configured to comprise: a cam, for example double tap cam, 2006 driven by a motor 2002 connected to a power source (for example, a battery) 2014; and a ratchet, for example a double tap ratchet, 2008, configured to rotate a lead screw 2004.
  • lead screw 2004 may be unitarily formed from non-metallic and metallic materials, such as polymeric materials, including, but not limited to, thermoplastics, stainless steels or other metallic alloys.
  • the ratchet gear 2008 can be a single part composed of two identical sets of gear teeth aligned axially but rotationally biased, for example 14 tooth, from each other.
  • a vertical plate 2020 such as a formed baseplate (with various alignment features) can be provided in addition to, or integral with, structure 2000 for accommodating a ratchet gear 2008, a cam, for example a single-part dual cam driver, 2006 actuated by a bi-directional motor 2002, a metal spring clip 2022 (for example a single clip with two arms, or two one-arm clips), a clip bias pin 2024, a cam alignment pin (not visible), and one or more stopper pins 2028, 2028A can be used to constrain and/or guide the aforementioned components.
  • a cam for example a single-part dual cam driver, 2006 actuated by a bi-directional motor 2002
  • a metal spring clip 2022 for example a single clip with two arms, or two one-arm clips
  • a clip bias pin 2024 for example a single clip with two arms, or two one-arm clips
  • a cam alignment pin not visible
  • one or more stopper pins 2028, 2028A can be used to constrain and/or guide the
  • ratchet 2008 can be configured as a ratchet gear 3008 comprising two sets of gear teeth 3032, 3034 that can be split via a central circular flange 3036 which extends past the maximum diameter of the gear teeth and separates and guides the two arms 3022, and 3024 of the metal spring clip, such as a clip 2022.
  • the ratchet gear 2008 may be combined or fastened to an axially aligned set-screw.
  • cam 2006 can be configured as a singlepart dual cam driver 4006 that can be composed of two cam surfaces 4010, 4012 which are axially aligned but symmetrically mirrored.
  • the (3) single-part dual cam driver 4006 can have an effective rotation angle of approximately 315°.
  • the motion profile of the single-part dual cam driver 4006 can be broken down into 3 phases:
  • Phase I A 77.5° Dwell, in which the single-part dual cam driver 4006 is rotating but the metal spring clip 2022 is not advancing or retracting.
  • Phase 2 A 160° constant acceleration motion, in which the single-part dual cam driver 4006 is rotating and the metal spring clip 2022 is advancing or retracting, depending on the arm
  • Phase 3 A 77.5° Dwell, in which the single-part dual cam driver 4006 is rotating but the metal spring clip 2022 is not advancing or retracting.
  • a distal end of barrel 2012 may include an endcap 3070 to facilitate connection of barrel 2012 to an insertion mechanism, such as a mechanism 106, for example via port or tube 3072, to dispense medium or fluid out of barrel 2012 by displacement of plunger 2005.
  • Endcap 3070 can also be configured to fac ilitate connection of barrel 2012 to fill port or inlet 3200, for example via a tube such as tube 3074, to fill barrel 2012 with medium or fluid.
  • motor 2002 can be controlled by a microprocessor having a memory, such as a microchip mounted on a PCB 300, or other controlling method.
  • a cam 2006 such as a single-part dual cam driver 4006, can be constrained via a mechanical interference between features protruding from the cam 4006, such as a single-part dual cam driver 4006, and for example two stopper pins 2028 adjacent to the cam driver 4006.
  • a “D” shaft motor interface feature 5050 can be axially aligned with each of the cam surfaces 4010, 4012.
  • the cam surfaces 4010, 4012 can push against each of the arms 3022, 3024 of the metal spring clip, such as clip 2022. Because the two cam surfaces 4010, 4012 are symmetrically mirrored, rotation of the, for example single-part, dual cam driver 4006 causes one arm, for example 3022 of a metal spring clip 2022 to advance while the other arm, for example 3024, retracts. An advancing arm 3022 of the metal spring clip 2022 pushes on the engaged ratchet gear tooth, for example of gear teeth 3034.
  • the retracting arm, for example 3024, of the metal spring clip 2022 springs back and passes over the succeeding tooth, for example of gear teeth 3032, resetting the mechanism.
  • this resetting motion can eliminate the need for a secondary ratchet pawl used to eliminate the possibility of ratchet back-drive and decreases the complexity and cost of the mechanism.
  • a clip bias pin 2024 can be positioned to interfere slightly with the arms 3022, 3024 of the spring clip 2022 when advanced fully, and can provide a counter-force to help guide the arms to reset position during retraction.
  • this pin 2024 may be removed, for example in alternate design embodiments, depending on the stiffness and shape of the metal spring clip 2022.
  • the stiffness of pushing arms 3022, 3034 of clip 2022 can be varied as required.
  • thicknesses may be increased or decreased during manufacturing to vary the stiffness of the pushing arms 3022, 3034 of a metal spring clip 2022.
  • spring steel stamped metal spring clip arms 3022, 3034 may be of the same thickness throughout (A), or hemmed flat and fused such that the length of arm between the teeth of the ratchet gear and the single-part dual cam driver is roughly twice as thick as the rest of the clip, for example with ham 6002 up to first bend radius (B), or ham 6004 past first bend radius (C).
  • disclosed example design embodiments can comprise a cam alignment pin which is axially aligned with the motor “D” shaft input feature of the cam 2006, such as a single-part dual cam driver 4006.
  • example embodiments of the design may not require an axial alignment pin depending on positional tolerances and motor alignment and fastening methods.
  • a third stopper pin 2028A can be used to hold the metal spring clip 2002 against the alignment features 2021 of the formed baseplate 2020.
  • disclosed example design embodiments can comprise a cam/motor stop switch 7000 configured with respect to, or as a part of mechanism 2010 where conductive elements, such as conductive spring, 7200 interface with a clip 7022 and cam 7006.
  • conductive elements 7200 can be disposed on base 7002 of a pump and can interfaces with cam 7006 via a connection element, for example an electrical bush, 7004 connected to one of conductive elements 7200.
  • Clip 7022 can be, or can comprise, a metallic indexing portion, and can be connected to another of conductive elements 7200 not connected to connection element 7004.
  • Cam 7006 can comprise an electrically conductive, for example metallic, portion 7006A and an electrically non-conductive, for example plastic, portion 7006B, contacting connection element 7004.
  • isolated switch current path components can comprise a current flow 7500 created between one of conductive elements 7200 connected to source 7504 and another of conductive elements 7200 connected to ground 7502 (and, for example also connected to clip 7022), when electrically conductive cam portion 7006A contacts connection element 7004 connected to ground 7502 and conducts.
  • no current flow path is created when electrically non-conductive cam portion 7006B contacts connection element 7004.
  • ratchet 8008 can comprise conductors 8100, such as one or more pins 8102 that path through ratchet gear 8034, 8032, and conductive elements 8200 can comprise two conductive elements 8200A and 8200B, which may or may not be connected directly to a PCB, such as PCB 300.
  • Conductive elements 8200 can be disposed on base 7002 of a pump and can interfaces with ratchet 8008, as illustrated in non-limiting example of Figures 7A and 8A-8B.
  • ratchet 8008 rotates conductors 8100 connect conductive elements 8200A and 8200B causing an electrical short (“ON”) 8500 (Figure 8B)
  • conductors 8100 disconnect from conductive elements 8200A and 8200B such that conductive elements 8200A and 8200B connect to a non- conductive, such as plastic, portion 8110 of ratchet 8008 causing an open circuit (“OFF”) 8600 ( Figure 8C).
  • conductive elements 9200 disposed on either side of ratchet 8008 can be, or can comprise, conductive, for example spring-loaded, metal clips 9200A and 9200B, which may or may not be connected directly to a PCB, such as PCB 300.
  • Clips 9200A and 9200B can be disposed on base 7002 instead of conductive springs 8200A and 8200B (see example of Figure 8A), and can be configured with respect to ratchet 8008 such that as ratchet 8008 rotates conductors 8100 connect conductive elements 9200A and 9200B causing an electrical short (“ON”) 8500 (see example of Figure 8B), and as ratchet continues to rotate, conductors 8100 disconnect from conductive elements 9200A and 9200B instead connecting to a non-conductive portion 8200 of ratchet 8008 causing an open circuit (“OFF”) 8600 (see example of Figure 8C).
  • ON electrical short
  • OFF open circuit
  • ratchet 10808 can comprise a ratchet body 10008 and conductor 10200, such as for example a tube cut into a shape of a crown.
  • Tire tines or leads 10201 of conductor 10200 can be passed through corresponding opening 10801 of the ratchet body 10008, electrically joining proximal side 10010 and distal side 10020 of ratchet body 10008, where for example tines 10201 and non- conductive portions 10202 between tines 10201 can be on proximal side 10010, and conductive ring 10203 can be on distal side 10020.
  • ratchet body 1008 can be separated by two sets of gear teeth 10032, 10034 that can be split via a central circular flange 10036 (see, for example, Figure 3), and openings 10801 for passing through tines 10201 can be through the gear teeth 10032,10034 and flange 10036 structures.
  • the tines 10201 may or may not be used as the radial bearing surface of the ratchet 10808.
  • tines 10201 may be folded inwards at the tips to form a snap feature, for example over end of proximal side 10010, holding the conductor 10200 in place with respect to ratchet body 10008 after sliding through openings 10801 in the ratchet body 10008 during assembly.
  • number and size of tines 10201 may be increased or decreased to accommodate manufacturing methods and/or design requirements.
  • clips 9200A and 9200B, or conductive springs 8200A and 8200B can be disposed on base 7002 and can be configured with respect to ratchet 108008 such that as ratchet 108008 rotates conductor tines 10201 and ring 10203 connect conductive elements 9200 / 8200 causing an electrical short (“ON”) 8500 (see example of Figure 8B), and as ratchet continues to rotate, tines 10201 disconnect from one of conductive elements 9200 /
  • Figure 11 illustrates in a block diagram an example of a configuration of design elements according to exemplary' implementations of example disclosed embodiments, where in an exemplary implementation a drive ratchet encoder 11000 can comprise for example a ratchet wheel rotation coupled switch 11002, including for example an encoder 8000 (see for example Figure 8B) or an encoder 10808 (see for example Figure 9), and a motor encoder 11100 can comprise for example a motor cam rotation coupled switch 11102, including for example a cam/motor stop switch 7000 (see for example Figure 7B).
  • a drive ratchet encoder 11000 can comprise for example a ratchet wheel rotation coupled switch 11002, including for example an encoder 8000 (see for example Figure 8B) or an encoder 10808 (see for example Figure 9)
  • a motor encoder 11100 can comprise for example a motor cam rotation coupled switch 11102, including for example a cam/motor stop switch 7000 (see for example Figure 7B).
  • a ratchet wheel rotation coupled switch 11002 can comprise a first conductive element 11810 (comprising for example and without limitation a spring and/or clip, etc., see for example Figures 8B and 9) connected to a drive ratchet encoder source pad 11814, and a second conductive element 11820 (comprising for example and without limitation a spring and/or clip, etc., see for example Figures 8B and 9) connected to a drive ratchet encoder ground pad 11822.
  • a first conductive element 11810 comprising for example and without limitation a spring and/or clip, etc., see for example Figures 8B and 9
  • a second conductive element 11820 comprising for example and without limitation a spring and/or clip, etc., see for example Figures 8B and 9 connected to a drive ratchet encoder ground pad 11822.
  • a motor cam rotation coupled switch 11102 can comprise a first conductive element 11710 (comprising for example and without limitation a spring and/or clip, etc., see for example Figure 7B) connected to a motor encoder source pad 11754, and a second conductive element 11720 (comprising for example and without limitation a spring and/or clip, etc., see for example Figure 7B) connected to a motor encoder ground pad 11752.
  • Figure 12 illustrates in a block diagram an example of a configuration of design elements according to another exemplary implementations of example disclosed embodiments, where in an example non-limiting configuration, for example to facilitate reduced complexity and/or part count, a common (for example, coupled) ground pad 12502 and common conductive element 12501 may be used to, for example and without limitation, create a simplified, coupled mechanism.
  • a common (for example, coupled) ground pad 12502 and common conductive element 12501 may be used to, for example and without limitation, create a simplified, coupled mechanism.
  • a ratchet wheel rotation coupled switch 11002 can comprise a first conductive element 11810 (comprising for example and without limitation a spring and/or clip, etc., see for example Figures 8B and 9) connected to a drive ratchet encoder source pad 11814, and a motor cam rotation coupled switch 11102 can comprise a first conductive element 11710 (comprising for example and without limitation a spring and/or clip, etc., see for example Figure 7B) connected to a motor encoder source pad
  • Both the ratchet wheel rotation coupled switch 11002 and motor cam rotation coupled switch 11102 comprise, and/or are connected to, a common/coupled conductive element 12501
  • a cam/motor end stop switch can comprise a cam 13000 comprising a non-conductive body 13002 and a conductive portion 13004.
  • body 13002 can be, or comprise, a plastic injection molded form.
  • conductive portion 13004 can be configured on, or formed as a part of, body 13002.
  • conductive portion 13004 comprise a conductive metal stamped part that can be pressed onto body 13002 during assembly of cam 13000.
  • a unitary conductive structure or a motor encoder conductive element 14002 such for example and without limitation a sheet metal comprising and or forming clips, springs, or a combination of both, can be used to transfer current from a source 7504 on a PCB 7002 to a cam/motor stop switch 14700 comprising for example a cam 7006.
  • a cam/motor stop switch 14700 comprising for example a cam 7006.
  • source current 7500 will no longer travel through a clip 7022 / cam 7006 configuration, instead as illustrated in the example of Fi gure 14, source current 7500 travels from source 7504 via conductive element 14002, for example contact feature 14001, to cam
  • Figures 15A and 15B in non-limiting illustrations show an isometric three-dimensional views of various exemplary configuration of example components of a coupled motor/ratchet encoder switch 15000 according to exemplary implementations of disclosed example embodiments (see for example Figure 12).
  • combination 15000 comprises a ratchet 15800 including one or more conductors 15811 (see for example, configuration 8000 of
  • FIGS 8A-8C a cam 15700 including a conductive portion 15711 (see for example, configuration 7000 of Figures 7B-7D, 13, and 14), a driver ratchet encoder conductive element
  • 15810 connected to a current source (for example on PCB 7002) and selectively connectable to conductors 15811 based on rotation of ratchet 15800, a common conductive element 15801 connected to ground and selectively connectable to conductors 15811 (based on rotation of ratchet 15800) and/or conductive portion 15711 (based on rotation of cam 15700), and a motor encoder conductive element 15710 connected to a current source (for example on PCB 7002) and selectively connectable to conductive portion 15711 based on rotation of cam 15700.
  • a current source for example on PCB 7002
  • each of the motion phases of the single-part dual cam driver may be reduced or extended to produce the desired ratchet mechanism motion.
  • the dwell phases may be removed altogether if required.
  • the cam surface minimum and maximum outer diameters may be adjusted to increase or decrease stroke length, and other motion curve types (such as sinusoidal, harmonic, or other variations) may be considered during the effective motion phase to change acceleration and actuation forces.
  • a similar central flange as described for the ratchet gear may be adapted to the single-part dual cam driver to better separate and guide the arms of the metal spring clip during mechanism actuation.
  • stopper pins may be eliminated by adding protruding features to the formed baseplate. Elimination of pins m ay reduce part count and decrease costs to manufacture.
  • various electrical hardware components such as an optical sensor, encoder, toggle lever, or push button may be used to ensure the single-part dual cam driver rotates far enough to reset the mechanism before switching directions.
  • a wide range of materials may be used for some or all of the components used in the designed mechanism.
  • the shape, size, and number of teeth on the ratchet gear may be changed to satisfy a wide variety of increment sizes.
  • proposed design of the single-part dual cam driver may be adapted to include three or more cam surfaces, all interfacing with their own clip arms or the arms of multiple clips.

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  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un système qui comprend un récipient de médicament de type seringue, un réservoir ou une chambre contenant un milieu ou un fluide qui peut être distribué en faisant avancer un piston disposé à l'intérieur du récipient et un mécanisme à cliquet disposé à l'extérieur du récipient entraîné par un moteur pour faire avancer le piston afin de distribuer le milieu ou le fluide hors du récipient. Un mécanisme d'entraînement peut comprendre un double mécanisme à cliquet actionné à l'aide d'un moteur apparié à une pompe à seringue entraînée par vis sans fin ou à une pompe seringue entraînée par liaison pour faire avancer un piston afin de distribuer le milieu ou le fluide dans un dispositif d'administration de médicament.
PCT/US2025/022390 2024-04-01 2025-03-31 Mécanisme d'entraînement d'indice entraîné par came Pending WO2025212544A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202463572707P 2024-04-01 2024-04-01
US63/572,707 2024-04-01

Publications (2)

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WO2025212544A1 WO2025212544A1 (fr) 2025-10-09
WO2025212544A9 true WO2025212544A9 (fr) 2025-11-06

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