Lancing device with ejector
A lancing device with an ejector that is movably retained with a housing in proximity to a lancet and is selectively movable between a home position, a first eject position, an intermediate position defined by contact of the ejector with the lancet, and a second eject position. The ejector is rotatable to move from the home to first eject position and is linearly translatable to move between the first and second eject positions. The ejector includes an arm that extends within the housing and engages the lancet, an exterior portion that is actuated by a user, and a post extending therebetween. The post extends through a slot in the housing which limits the linear movement and direction of the ejector. Upon rotation of the ejector, the arm extends through an opening at the rear of the carriage holding the lancet to permit access to the lancet.
1. A lancing device for piercing the skin of a patient, comprising:
a housing including an opening dimensioned to receive a lancet therein, and a slot disposed along a portion of said housing; and
an ejector having an exterior portion located outside said housing, a post extending from said exterior portion through said slot, an arm extending radially from said post within said housing, said ejector selectively adjustable rotationally and intermediately between:
(i) a home position wherein said arm is spaced apart from said lancet; and
(ii) a first eject position wherein said arm is aligned with said length of said slot; and
said ejector selectively adjustable longitudinally and intermediately between:
(iii) said first eject position; and
(iv) a second eject position wherein said lancet is ejected from said housing by said arm; and
further comprising one of:
(v) said ejector is further selectively adjustable to and from an intermediate position wherein said arm of said ejector contacts said lancet, said intermediate position of said ejector being between said home position and said first eject potion, and further being at least 45.deg. from said home position; said ejector being between said home position and said first eject potion, and further being at least 45.deg. from said home position;
(vi) a carriage retained within said housing, said carriage configured to receive and retain said lancet when inserted in said housing, said carriage comprising an open distal end, an opposite open proximal end, and a space extending between said distal and proximal ends, said space dimensioned to receive a body of said lancet therein, and wherein said arm of said ejector is: (a) parallel to and spaced apart from said open proximal end of said carriage in said home position, (b) perpendicular to and at least partially entering said open proximal end in said first eject position. and (c) within said space of said carriage in said second eject position; and
(vii) a guide extending radially from said post within said housing by one of (a) the same radial angle from said post as said arm and (b) a different radial angle from said post as said arm. said guide further comprising a first wall along a portion of a longitudinal side of said slot within said housing, said guide being perpendicular to said first wall in said home position and parallel to said first wall in said first and second eject positions. wherein contact between said first wall and said guide in said home position prevents longitudinal movement of said ejector along said slot.
2. The lancing device as recited in claim 1 , wherein said ejector is selectively adjustable rotationally by up to 90° between said home position and said first eject position.
3. The lancing device as recited in claim 1 , wherein said ejector is selectively adjustable longitudinally along said slot once said ejector is no longer in said home position.
4. The lancing device as recited in claim 3 , wherein said ejector is selectively adjustable longitudinally along said slot from said intermediate position.
5. The lancing device as recited in claim 1 , wherein said housing has a first end including said opening and an opposite second end, wherein said slot includes a length defined between a distal end nearest said first end of said housing and a proximal end nearest said second end of said housing, and said ejector is located at said proximal end of said slot in said home position and said first eject position, and at said distal end of said slot in said second eject position.
6. The lancing device as recited in claim 1 , wherein said carriage retains said lancet by frictional forces, said arm of said ejector transferring force applied to said exterior portion of said ejector to said lancet when in contact with said lancet, and said arm expels said lancet from said carriage when said force applied to said exterior portion of said ejector exceeds said frictional forces retaining said lancet in said carriage.
7. The lancing device as recited in claim 1 , further comprising an indicator on said exterior portion of said ejector and at least one indicia on said housing visible from outside said housing, wherein the relationship between said indicator and said indicia is indicative of the position of said ejector.
8. The lancing device as recited in claim 7 , wherein said at least one indicia further comprises a home indicia and an eject indicia, wherein said ejector is in said home position when said indicator aligns with said home indicia and said ejector is in said first eject position when said indicator aligns with said eject indicia.
9. The lancing device as recited in claim 1 , wherein said guide is spaced apart from said arm along said post.
10. The lancing device as recited in claim 1 , further comprising a biasing member mounted within said housing and biasing said ejector against said housing, said biasing member urging said ejector toward said first eject position when pressure is relieved from said exterior portion of said ejector.
11. The lancing device as recited in claim 1 , further comprising a motor selectively actuated to generate vibrations; said lancet having a head and a piercing member extending from said head; a contact surface disposed proximate to said piercing member on an exterior surface of one of said housing and said head of said lancet, said contact surface in mechanical communication with said motor and a target site on said patient, said contact surface translating said vibrations from said motor to said target site.
12. The lancing device as recited in claim 11 , wherein said motor is operative to vibrate said contact surface at a frequency in the range of 50-500 Hz.