Test strip ejector for medical device

• US 9,638,660 B2
• Filed: 02/19/2014
• Issued: 05/02/2017
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Hanson, James R., Lotarski, Derek C., Sauers, Matthew C., Uberta, III, Anthony J.
• Primary Examiner(s): Wright, P. Kathryn
• Application Number:
  US14/183,986
• Publication Number:
  US 20140166482A1
• Time in Patent Office: 1,168 Days
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: G01N 27/416 Systems G01N27/27 takes precedence
• CPC Class Codes: G01N 33/4875 Details of handling test elements, e.g. dispensing or storage, not specific to a particular test method test-elements per se B01L, automatic analysers G01N35/00, in-vivo analysis on the human body for medical diagnosis A61B
• CPC Class Codes: G01N 33/49 Blood chemical methods for determining blood cell populations G01N33/5094; chemical analysis of blood groups or blood types G01N33/80
• CPC Class Codes: Y10T 436/11 Automated chemical analysis
• CPC Class Codes: Y10T 436/112499 with sample on test slide

Abstract

A system and method for receiving and ejecting a test strip of a fluid testing device. The system includes parallel first and second guide rails defining a rail cavity between the guide rails. A sled includes a sled post and opposed first and second side leg sets each having at least one deflectable leg. Each of the deflectable legs is externally slidably engaged to one of the guide rails limiting the sled to only sliding motion in either a loading direction or an opposite ejection direction. An actuator arm is rotatably connected to a mechanism assembly. The sled post is received in an actuator arm slot. Actuator arm rotation in a loading rotational direction displaces the sled in the loading direction in a sliding motion. Subsequent opposite rotation of the actuator arm in an ejection rotational direction displaces the sled in the ejection direction and ejects the test strip.

Claims

1. A test strip ejector system for receiving and ejecting a test strip of an analysis device, the system comprising:

a plurality of guide rails attached to a component board, the plurality of guide rails including at least a first guide rail and a second guide rail, the first and second guide rails being the outermost guide rails of the plurality of guide rails, each of the first and second guide rails including an upper surface, an internal face, and an external face opposite the internal face, the internal faces of the first and second guide rails facing one another to define a rail cavity that is disposed between the first and second guide rails, and the external faces of the first and second guide rails facing away from the rail cavity in opposite directions;

a sled having opposed first and second body ends and having multiple opposed legs configured to partially capture there between the first and second guide rails, each of the legs positioned externally to and retained in sliding continuous contact with one of the first or second guide rails limiting sled motion to each of a loading direction and an ejection direction;

a member movably connected to the analysis device, the sled coupled to the member such that member movement in a first direction displaces the sled in the loading direction to position the sled in a test strip test position, and opposite member movement in a second direction operates to displace the sled in the ejection direction away from the test strip test position to eject the test strip from the analysis device by sled travel toward a test strip ejection position; and

each of the legs having a planar leg face disposed in sliding contact with the upper surface of one of the guide rails and an inner shape selected to contact and at least partially capture the external face of one of the guide rails, thereby limiting displacement of the sled to only sliding motion in either the loading direction or the ejection direction;

wherein the first and second guide rails are not bounded by any other guide rails in a direction that is transverse to the loading direction and the ejection direction;

wherein the multiple opposed legs includes at least first and second legs on a first side of a sled longitudinal axis and at least third and fourth legs on a second side of the sled longitudinal axis;

wherein the sled includes opposed first and second contact legs which are substantially rigid and integrally connected to the sled, the first and second contact legs positioned between the first and second legs and the third and fourth legs;

wherein the first and second contact legs are positioned within the rail cavity defined between the first and second guide rails, the test strip when positioned within rail cavity directly contacting the first and second contact legs.

2. The system of claim 1, wherein the legs include at least one bend defining an engagement portion and include a convex leg portion in sliding contact with an upper surface of one of the first or second guide rails.

3. The system of claim 2, wherein the at least one bend of each of the legs further includes an inner concave leg portion in sliding contact with an oppositely facing lower surface of the first or second guide rail.

4. The system of claim 1, wherein each of the legs includes an engagement portion externally contacting and partially capturing the face of one of the guide rails between first and second ends of the guide rails.

5. A glucose test meter having a test strip ejector system for receiving and ejecting a test strip, the test meter comprising:

a meter body having a component board positioned therein;

a plurality of guide rails including a first guide rail and a second guide rail, the first and second guide rails being the outermost guide rails in the plurality of guide rails, the first and second guide rails being parallel to one another, the first and second guide rails being connected to the component board, and the first and second guide rails defining a rail cavity between the guide rails;

a sled having a sled post, first and second contact legs extending into the rail cavity, and opposed first and second leg sets positioned externally to and slidably coupled with the first or second guide rails thereby limiting displacement of the sled to only sliding motion in either a loading direction or an opposite ejection direction, each of the legs having a shape selected to externally contact and partially capture a face of one of the guide rails, a test strip when disposed in the rail cavity directly contacting the contact legs during motion in at least the ejection direction motion; and

an actuator arm rotatably connected to the meter body, the sled post contacting the actuator arm such that sliding motion of the sled in the loading direction and rotation of the actuator arm in a loading rotational direction positions the sled in a test strip test position, and opposite rotation of the actuator arm in an ejection rotational direction operates to displace the sled in the ejection direction and to eject the test strip;

wherein the first and second guide rails are not bounded by any other guide rails in a direction that is transverse to the loading direction and the opposite ejection direction of the sled;

wherein the sled includes a post received in an elongated slot of the actuator arm to retain the sled in contact with the actuator arm during motion in both the loading and ejection directions.

6. The glucose test meter of claim 5, further including an ejection button connected to the mechanism assembly depressed to rotate the actuator arm in the ejection rotational direction.

7. The glucose test meter of claim 5, wherein the component board is a printed circuit board.

8. The glucose test meter of claim 5, wherein each of the first and second guide rails has an external face, the external faces of the first and second guide rails facing away from one another and away from the rail cavity that is defined between the first and second guide rails.

9. A test strip ejector system for receiving and ejecting a test strip of an analysis device, the system comprising:

a plurality of guide rails attached to a component board, the plurality of guide rails including at least a first guide rail and a second guide rail, the first and second guide rails being the outermost guide rails of the plurality of guide rails;

a sled having opposed first and second body ends and having multiple opposed legs configured to partially capture there between the first and second guide rails, each of the legs positioned externally to and retained in sliding continuous contact with one of the first or second guide rails limiting sled motion to each of a loading direction and an ejection direction that are parallel to a sled longitudinal axis;

a member movably connected to the analysis device, the sled coupled to the member such that member movement in a first direction displaces the sled in the loading direction to position the sled in a test strip test position, and opposite member movement in a second direction operates to displace the sled in the ejection direction away from the test strip test position to eject the test strip from the analysis device by sled travel toward a test strip ejection position; and

each of the legs having an inner shape selected to contact and partially capture an external face of one of the guide rails, thereby limiting displacement of the sled to only sliding motion in either the loading direction or the ejection direction;

wherein the multiple opposed legs includes at least first and second legs on a first side of the sled longitudinal axis and at least third and fourth legs on a second side of the sled longitudinal axis;

wherein the sled includes opposed first and second contact legs connected to the sled, the first contact leg being positioned on the first side of the sled longitudinal axis between the first and second legs and the second contact leg being positioned on the second side of the sled longitudinal axis between the third and fourth legs;

wherein the first and second contact legs are positioned within a rail cavity defined between the first and second guide rails, the test strip when positioned within rail cavity directly contacting the first and second contact legs.