Test strip ejector for medical device

• US 10,048,247 B2
• Filed: 10/18/2016
• Issued: 08/14/2018
• Est. Priority Date: 02/07/2013
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Bishop, Will A., Hanson, James R., Trese, Joyce A.
• Primary Examiner(s): Whatley, Benjamin R
• Application Number:
  US15/296,367
• Publication Number:
  US 20170038363A1
• Time in Patent Office: 665 Days
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
• CPC Class Codes: G01N 2035/00108 Test strips, e.g. paper
• CPC Class Codes: G01N 2035/00138 Slides
• CPC Class Codes: G01N 27/3273 Devices therefor, e.g. test element readers, circuitry details not specific to biochemical electrodes G01N33/4875
• 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: Y10T 403/591 having operating mechanism

Abstract

A system configured to receive and eject a fluid testing device test strip. The system includes a strip connector having first and second guide rails, and divider walls each having a channel. A sled has first and second legs connected to a cross member. Each leg has a contact leg extending inwardly from a chamfered end. The first and second legs when positioned parallel to the guide rails have the contact leg captured in the divider wall channels retaining the sled in sliding contact with the guide rails for motions in loading and ejection directions. A mechanism assembly is movably connected to the fluid testing device. The cross member is coupled so operation in a first direction displaces the sled in the loading direction positioning the sled in a test strip test position, and opposite operation positions the contact legs in direct contact with and ejects the test strip.

Claims

1. A test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device, the system comprising:

a strip connector configured to receive the test strip, the strip connector including first and second guide rails and first and second divider walls positioned between the first and second guide rails, wherein a first channel is defined between the first divider wall and the first guide rail, wherein a second channel is defined between the second divider wall and the second guide rail, and wherein the first and second guide rails extend in an ejection direction;

a sled having parallel first and second legs connected to a cross member at one end, each of the first and second legs including a planar portion and having a chamfered end located opposite to the end with the cross member such that the chamfered ends are free standing ends not joined by the cross member, wherein the cross member separates the first and second legs by an initial spacing, each of the free standing ends of the first and second legs having a contact leg extending inwardly from the chamfered end towards the divider walls, the first and second legs being elastically flexible and having an initial orientation where the first and second legs are deflected outwardly with respect to the first and second guide rails while the sled is being installed in sliding contact with the first and second guide rails, wherein in the initial orientation the planar portion of the first and second legs are at an angle with respect to the ejection direction of the first and second guide rails and the chamfered ends of the first and second legs in the initial orientation are positioned parallel to the ejection direction of the first and second guide rails such that the contact leg of each of the first and second legs is respectively received in the first and second channels, the first and second legs having a subsequent orientation where the first and second legs are rotated from the initial orientation to the subsequent orientation where the planar portion of the first and second legs are parallel to the ejection direction of the first and second guide rails allowing the first and second legs to spring back to the initial spacing such that the first and second legs are no longer deflected thereby capturing the contact leg of each of the first and second legs in the first and second channels respectively, wherein in the subsequent orientation the first and second legs of the sled are slidably disposed on and snap fitted around the first and second guide rails respectively to retain the sled in sliding continuous contact with the first and second guide rails for sled motion in each of a loading direction and the ejection direction; and

an actuator arm movably connected to the fluid testing device, the cross member of the sled coupled to the actuator arm such that movement of the actuator arm in a first direction displaces the sled in the loading direction to position the sled in a test strip test position, and opposite movement of the actuator arm in a second direction operates to displace the sled in the ejection direction away from the test strip test position and to position the contact legs in direct contact with the test strip to eject the test strip from the fluid testing device by sled travel toward a test strip ejection position.

2. The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein each of the first and second guide rails have a guide rail bottom side, wherein the first and second legs are oriented in mirror image to each other, and each includes a convex portion transitioning into a concave portion, the concave portion adapted to capture the guide rail bottom side of the respective first and second guide rails.

3. The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, further including an elongated slot created in the cross member, wherein a post extending from the actuator arm is slidably received and rotatable in the elongated slot.

4. The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the strip connector further includes multiple insulator members contacted by the cross member of the sled to stop sliding displacement of the sled in the ejection direction.

5. The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 4, further including first and second flanges extending transversely from the cross member, the first flange contacting the multiple insulator members to stop the sled.

6. The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the contact leg of the first leg and the contact leg of the second leg are aligned with one another to contact at the same time an end face of the test strip at two different locations to reduce any racking of the test strip.