Lancing device
First Claim
Patent Images
1. A lancing device comprising:
- a lancet body (14) of elongate form and having a sharp tip (16) at a forward end thereof;
a longitudinally acting drive spring (26) positioned against a rearward end of the lancet body (14) for imparting generally longitudinal movement to said lancet body (14), the drive spring (26) being a longitudinally directed spring strained to apply a forward longitudinally acting force on the rearward end of the lancet body (14);
a housing (10) receiving said lancet body and having an aperture (22) in a forward end thereof,wherein in use when the device is fired, the lancet body (14) moves longitudinally down the housing (1) under influence of the drive spring (26) applying the forward longitudinally acting force such that the sharp tip (16) of the lancet body projects through the aperture (22); and
an arrangement (28, 30, 32) for controlling movement of the lancet body to cause the sharp tip of the lancet body to deflect laterally during at least part of a period in which the sharp tip of the lancet body (14) projects from said aperture,wherein in use when the device is fired, i) the drive spring (26) imparts the forward longitudinally acting force to said lancet body (14) to move said lancet body (14) longitudinally down the housing (1) and ii) the arrangement (28, 30, 32) causes a lateral movement of the sharp tip of the lancet body (14) to deflect laterally during at least part of the period in which the sharp tip of the lancet body (14) projects from said aperture,wherein the arrangement (28, 30, 32) comprises cooperating control surfaces on the lancet body (28, 30) and the housing (32), andwherein the cooperating control surfaces include a cam surface (32) on the housing and a cam follower (28, 30) on the lancet body, the cam surface (32) having a downstream portion at the forward end of the housing and an upstream portion at the rearward end of the housing, the downstream portion having a U shape open to the rearward end of the housing.
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Accused Products
Abstract
A lancing device includes a lancet body (14) of elongate form and having a sharp tip (16) at the forward end thereof; a drive spring (26) for imparting generally longitudinal movement to the lancet body, and a housing (10) receiving the lancet body and having an aperture (22) in the forward end thereof through which the sharp tip (16) of the lancet body projects in use when the device is fired. The device includes elements (28, 30, 32) for controlling movement of the lancet body (14) to cause the tip of the lancet to execute a lateral movement when it projects from the aperture.
23 Citations
18 Claims
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1. A lancing device comprising:
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a lancet body (14) of elongate form and having a sharp tip (16) at a forward end thereof; a longitudinally acting drive spring (26) positioned against a rearward end of the lancet body (14) for imparting generally longitudinal movement to said lancet body (14), the drive spring (26) being a longitudinally directed spring strained to apply a forward longitudinally acting force on the rearward end of the lancet body (14); a housing (10) receiving said lancet body and having an aperture (22) in a forward end thereof, wherein in use when the device is fired, the lancet body (14) moves longitudinally down the housing (1) under influence of the drive spring (26) applying the forward longitudinally acting force such that the sharp tip (16) of the lancet body projects through the aperture (22); and an arrangement (28, 30, 32) for controlling movement of the lancet body to cause the sharp tip of the lancet body to deflect laterally during at least part of a period in which the sharp tip of the lancet body (14) projects from said aperture, wherein in use when the device is fired, i) the drive spring (26) imparts the forward longitudinally acting force to said lancet body (14) to move said lancet body (14) longitudinally down the housing (1) and ii) the arrangement (28, 30, 32) causes a lateral movement of the sharp tip of the lancet body (14) to deflect laterally during at least part of the period in which the sharp tip of the lancet body (14) projects from said aperture, wherein the arrangement (28, 30, 32) comprises cooperating control surfaces on the lancet body (28, 30) and the housing (32), and wherein the cooperating control surfaces include a cam surface (32) on the housing and a cam follower (28, 30) on the lancet body, the cam surface (32) having a downstream portion at the forward end of the housing and an upstream portion at the rearward end of the housing, the downstream portion having a U shape open to the rearward end of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification