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1. EP1986550 - SINGLE-USE SKIN PRICKING DEVICE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

Claims

1. A single-use skin pricking device (7) comprising:

a housing (8) defining an opening at an end;

a lancet (1) disposed within the housing, the lancet comprising a cap (4) covering an end of a needle (3);

biasing means (11) coupled between the housing and the lancet;

a trigger (12) mounted telescopically within said opening of the housing for relative movement therewith, the trigger being releasably coupled to the lancet such that movement of the trigger in a first direction into an interior of the housing moves the lancet in a direction to compress said biasing means, and then causes release of the lancet from the trigger whereby said biasing means drives the lancet in a second direction substantially opposite to said first direction, characterised in that said movement of the trigger in the first direction first causes the cap to be removed from the lancet to expose the needle.


  2. A device according to claim 1, wherein said cap is substantially fixed relative to said housing.
  3. A device as claimed in any preceding claim and comprising one or more guide tracks (10) disposed within the housing for guiding movement of the lancet within the housing.
  4. A device as claimed in any preceding claim, wherein the trigger is coupled to the lancet by slip means, the slip means allowing the trigger to disengage from the lancet at some predefined point of travel in said first direction.
  5. A device according to claim 4, said slip means comprising trigger wedges (15) formed on the trigger and wedge engaging formations formed on the lancet, the trigger wedges engaging said formations as the trigger moves in said first direction up to a point of travel where the lancet moves to disengage the wedges from the formations to release the lancet.
  6. A device as claimed In any preceding claim, wherein the biasing means is arranged to retract the lancet fully within the housing once the device has been fired.
  7. A device as claimed in any preceding claim, wherein the biasing means is formed integrally with the housing.
  8. A device as claimed in any preceding claim, wherein the biasing means is partially preloaded prior to depressing the trigger.
  9. A device as claimed in preceding claim, wherein the biasing means comprises a helical spring.
  10. A device as claimed in any preceding claim wherein the trigger comprises an opening (13) through a lancet needle projects when the device is fired.
  11. A device as claimed in any preceding claim, wherein the trigger is actuated by pressing it directly against an area of skin to be pricked.
  12. A device as claimed in any preceding claim, wherein the trigger and the housing are moulded Integrally with a weakened portion disposed at an interface between the trigger and the housing, the weakened portion configured to be broken when the trigger is pressed.
  13. A device as claimed in any preceding claim, further comprising a locking mechanism arranged to lock the trigger relative to the housing in a predetermined position once the trigger has been pressed.
  14. A device as claimed in any preceding claim, further comprising a window provided in the housing to allow a user to view the lancet.
  15. A device as claimed in any preceding claim, further comprising:

a substantially U-shaped guide track (10) within the housing, the lancet being mounted in the guide track.


  16. A device according to claim 15, wherein the legs of the U-shaped track lie substantially parallel to the direction of movement of the trigger.