A counter containing: a first ring member having first indicia and a second ring member having second indicia, each of the first and second ring members being rotatable in increments about a common axis, one or both of the first and second indicia indicating a count; a drive mechanism for rotating t
A counter containing: a first ring member having first indicia and a second ring member having second indicia, each of the first and second ring members being rotatable in increments about a common axis, one or both of the first and second indicia indicating a count; a drive mechanism for rotating the first ring member; and a coupling mechanism for releasably coupling the first ring member to the second ring member, to allow the first and second ring members to rotate cooperatively when coupled and to allow independent rotating of the first ring member when not coupled; wherein the coupling mechanism contains first and second engagement structures, the first engagement structures being movable radially outwardly and radially inwardly relative to the axis.
대표청구항▼
1. A counter comprising: a first ring member having first indicia and a second ring member having second indicia, each of said first and second ring members being rotatable in increments about a common axis, one or both of said first and second indicia indicating a count;a third ring member being co
1. A counter comprising: a first ring member having first indicia and a second ring member having second indicia, each of said first and second ring members being rotatable in increments about a common axis, one or both of said first and second indicia indicating a count;a third ring member being coaxially arranged about said common axis of said first and second ring members;a drive mechanism for rotating said first ring member; anda coupling mechanism for releasably coupling said first ring member to said second ring member, to allow said first and second ring members to rotate cooperatively when coupled and to allow independent rotating of said first ring member when not coupled;wherein said coupling mechanism comprises first and second engagement means and a deflector, said first engagement means being movable radially outwardly and radially inwardly relative to said axis, said first engagement means engage with said second engagement means when said first engagement means are moved radially outwardly and said deflector is connected to, or integral with said third ring member, and deflects said first engagement means radially outwardly. 2. A counter as claimed in claim 1 wherein said first engagement means is deflected radially outwardly after a predetermined degree of rotation of said first ring member, said predetermined amount of rotation of said first ring member being less than a full rotation of said first ring member about said common axis. 3. A counter as claimed in claim 1 wherein said first engagement means is connected to, or integral with, said first ring member. 4. A counter as claimed in claim 1 wherein said first engagement means comprise an arm having a slot and a contact end. 5. A counter as claimed in claim 4 wherein said contact end comprises an upwardly extending component that contacts said deflector. 6. A counter as claimed in claim 4, wherein said first engagement means comprise four arms each having a slot and a contact end. 7. A counter as claimed in claim 1 wherein said second engagement means is connected to, or integral with, said second ring member. 8. A counter as claimed in claim 4 wherein said second engagement means comprises a plurality of protrusions. 9. A counter as claimed in claim 8 wherein said protrusions are equally spaced apart. 10. A counter as claimed in claim 8 wherein when said arm is moved radially outwardly said slot of said arm engages with one of said protrusions. 11. A counter as claimed in claim 1, wherein said third ring member comprises a limiting mechanism to limit free rotation of said second ring member relative to said third ring member about said common axis. 12. A counter as claimed in claim 11, wherein said limiting mechanism comprises a resiliently deformable portion for applying pressure on said second ring member for said limiting. 13. A counter as claimed in claim 11, wherein said second ring member comprises a plurality of substantially equally-spaced protrusions and wherein said limiting mechanism engages with said protrusions for limiting said free rotation of said second ring member. 14. A counter as claimed in claim 1, wherein said third ring member comprises one or more locating recesses disposed in an upper circumferential surface for engaging with correspondingly-shaped protrusions in a housing for preventing free rotation of said third ring member. 15. A dispenser comprising: a body for receiving a medicament container;a medicament container;a dispensing mechanism for dispensing a dose of medicament from said container; anda counter as claimed in claim 1. 16. A dispenser comprising the counter as claimed in claim 1. 17. A dispenser as claimed in claim 16 which is a pressurised metered-dose inhaler (pMDI). 18. A dispenser as claimed in claim 16, further comprising a tolerance adjustment mechanism. 19. A counter comprising: a first ring member having first indicia and a second ring member having second indicia, each of said first and second ring members being rotatable in increments about a common axis, one or both of said first and second indicia indicating a count;a drive mechanism for rotating said first ring member; anda coupling mechanism for releasably coupling said first ring member to said second ring member, to allow said first and second ring members to rotate cooperatively when coupled and to allow independent rotating of said first ring member when not coupled;wherein said coupling mechanism comprises first and second engagement means, wherein said first engagement means comprise an arm having a slot and a contact end, said first engagement means are movable radially outwardly and radially inwardly relative to said axis and said first engagement means engage with said second engagement means when said first engagement means are moved radially outwardly. 20. A counter as claimed in claim 19, wherein said coupling mechanism comprises a deflector to deflect said first engagement means radially outwardly. 21. A counter as claimed in claim 20 comprising a third ring member being coaxially arranged about said common axis of said first and second ring members, and wherein said deflector is connected to, or integral with said third ring member. 22. A counter as claimed in claim 21, wherein said third ring member comprises a limiting mechanism to limit free rotation of said second ring member relative to said third ring member about said common axis. 23. A counter as claimed in claim 22, wherein said limiting mechanism comprises a resiliently deformable portion for applying pressure on said second ring member for said limiting. 24. A counter as claimed in claim 22, wherein said second ring member comprises a plurality of substantially equally-spaced protrusions and wherein said limiting mechanism engages with said protrusions for limiting said free rotation of said second ring member. 25. A counter as claimed in claim 21, wherein said third ring member comprises one or more locating recesses disposed in an upper circumferential surface for engaging with correspondingly-shaped protrusions in a housing for preventing free rotation of said third ring member. 26. A counter as claimed in claim 19, wherein said first engagement means is deflected radially outwardly after a predetermined degree of rotation of said first ring member, said predetermined amount of rotation of said first ring member being less than a full rotation of said first ring member about said common axis. 27. A counter as claimed in claim 19 wherein said first engagement means is connected to, or integral with, said first ring member. 28. A counter as claimed in claim 19, wherein said first engagement means comprise four arms each having a slot and a contact end. 29. A counter as claimed in claim 28, wherein said contact end comprises an upwardly extending component that contacts said deflector. 30. A counter as claimed claim 19, wherein said second engagement means is connected to, or integral with, said second ring member. 31. A counter as claimed in claim 19, wherein said second engagement means comprises a plurality of protrusions. 32. A counter as claimed in claim 31, wherein said protrusions are equally spaced apart. 33. A counter as claimed in claim 31, wherein when said arm is moved radially outwardly said slot of said arm engages with one of said protrusions. 34. A dispenser comprising: a body for receiving a medicament container;a medicament container;a dispensing mechanism for dispensing a dose of medicament from said container; anda counter as claimed in claim 19. 35. A dispenser comprising the counter as claimed in claim 19. 36. A dispenser as claimed in claim 35 which is a pressurised metered-dose inhaler (pMDI). 37. A dispenser as claimed in claim 35, further comprising a tolerance adjustment mechanism.
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