The present invention relates generally to a fluid-monitoring system and, more particularly, to a new and improved sensor connector and release mechanism for a meter or instrument for handling multiple sensors that are used in analyzing at least one analyte in a fluid contained therein (e.g., blood glucose, cholesterol).
People suffering from various forms of diabetes routinely need to test their blood to determine the level of blood glucose. The results of such tests can be used to determine what, if any, insulin or other medication needs to be administered. In one type of blood glucose testing system, sensors are used to test a sample of blood.
Such a sensor may have a generally flat, rectangular shape with a front or testing end and a rear or contact end. The sensor contains biosensing or reagent material that will react with blood glucose. The testing end of the sensor is adapted to be placed into the fluid being tested, for example, blood that has accumulated on a person's finger after the finger has been pricked. The fluid is drawn into a capillary channel that extends in the sensor from the testing end to the reagent material by capillary action so that a sufficient amount of fluid to be tested is drawn into the sensor. The fluid then chemically reacts with the reagent material in the sensor with the result that an electrical signal indicative of the blood glucose level in the blood being tested is supplied to contact areas located near the rear or contact end of the sensor.
To couple the electrical signals produced at the sensor contacts to monitoring equipment, the sensors need to be inserted into sensor holders prior to the sensor end being placed into the fluid being tested. The sensor holders have corresponding mating contact areas that become coupled to the contacts on the sensor when the sensor is inserted into the holder. Consequently, the holders act as an interface between the sensor and monitoring equipment that accumulates and/or analyzes the test results.
Prior to being used, the sensors typically need to be maintained at an appropriate humidity level so as to insure the integrity of the reagent materials in the sensor. Sensors can be packaged individually in tear-away packages so that they can be maintained at the proper humidity level. For instance, blister-type packaging methods could be used. In this connection, the packages can include desiccant material to maintain the proper humidity in the package. To use an individual sensor for testing blood glucose, the package must be opened by tearing the seal. Alternatively, some packages require the user to exert force against one side of the package resulting in the sensor bursting or rupturing the foil on the other side. As can be appreciated, the opening of these packages can be difficult. Moreover, once the package is opened, the user needs to be sure that the sensor is not damaged or contaminated as it is being placed into the sensor holder and used to test the blood sample.
Some users have experienced difficulties in the operation and/or manipulation of the prior art sensor instruments. For example, users with limited dexterity may find it difficult to remove a used sensor from the device. Because the used sensor contains blood or other fluids, the sensor should be disposed of immediately after the testing procedure is completed. Moreover, physical handling of the used sensor should be avoided to prevent or inhibit the spreading of blood-born diseases or other harmful contaminants. It is therefore desirable that the used sensor be removed from the device without being grasped or otherwise handled by the user.
One prior art technique involves discharging the used test sensor by sliding the slide latch away from the testing end of the device and simultaneously tipping the testing end of the device downwardly. This requires an awkward manipulation of the device that may be particularly difficult for users, particularly elderly users suffering from diabetes, which lack dexterity in their wrist, hand or fingers. As a result, many users may be tempted to grab the end of the used sensor to remove it from the device.
Another prior technique, such as that described in United States Patent Publication No. US 2003/0031591, discloses a button that is depressed to release a previously used test sensor from the sensor-dispensing instrument by moving sensor contacts of the testing device away from the test sensor. Aligning the test sensors to the contacts of the sensor-dispensing instrument becomes more difficult if the meter contacts move relative to the walls that position the test sensor. Additionally, the amount of contact force between the sensor-dispensing instrument and the test sensor, which is important in ensuring a robust electrical connection, is too variable in some prior devices. It is therefore desirable to have an improved sensor-dispensing instrument that utilizes an improved sensor connector wherein the variability in contact force between the sensor-dispensing instrument and the test sensor is decreased. It is additionally desirable to have an improved sensor connector wherein the contacts remain in a generally fixed location.
According to one embodiment, a multi-contact sensor connector for use with a sensor-dispensing instrument adapted to handle a sensor pack containing a plurality of sensors. Each of the sensors has a plurality of electrical contacts. The multi-contact sensor connector comprises a test sensor support frame, a printed circuit board connector surface, a plurality of contacts, and a contact holder. The test sensor support frame forms an opening therethrough. The opening is adapted to allow a test sensor to pass through. The test sensor support frame has an inclined surface region adapted to guide a test sensor into the opening as well as a generally horizontal surface region adapted to support the test sensor in the opening. The plurality of contacts are adapted to interact with electrical contacts of the sensor. The contacts are positioned to secure the test sensor between the contacts and the generally horizontal surface region of the test sensor support frame. The contacts are compressed by the test sensor support frame. The contacts are fixed relative to the printed circuit board connector surface. The contact holder is adapted to retain the plurality of contacts and to electrically isolate the respective contacts from one another.
According to another embodiment, a multi-contact sensor connector for use with a sensor-dispensing instrument adapted to handle a sensor pack containing a plurality of sensors. Each of the sensors has a plurality of electrical contacts. The multi-contact sensor connector comprises a test sensor support frame, a plurality of contacts, a contact holder, and a sensor release button. The test sensor support frame forms an opening therethrough. The opening is adapted to allow a test sensor to pass through. The test sensor support frame has an inclined surface region adapted to guide a test sensor into the opening and a generally horizontal surface region adapted to support the test sensor in the opening. The plurality of contacts are adapted to interact with electrical contacts of the sensor. The contacts are fixedly positioned opposite the generally horizontal surface region of the test sensor support frame to secure the test sensor between the contacts and the generally horizontal surface region of the test sensor support frame. The contacts are compressible by the test sensor support frame. The contact holder is adapted to retain the plurality of contacts. The contact holder has a first sidewall and a second sidewall. The sensor release button is adapted to vertically displace the sensor support frame from the contacts, thereby releasing the test sensor when the sensor release button is depressed. The first sidewall and the second sidewall are adapted to laterally position the test sensor relative to the plurality of contacts.
According to a further embodiment of the present invention, an electrical contact carrier assembly for use with a multi-contact sensor connector comprises a plurality of electrical contacts, and a removable attachment member. The plurality of electrical contacts has a generally identical profile. The removable attachment member is adapted to removably connect the plurality of electrical contacts and provide proper lateral spacing between the contacts.
The above summary of the present invention is not intended to represent each embodiment, or every aspect, of the present invention. Additional features and benefits of the present invention are apparent from the detailed description and figures set forth below.
a is a perspective view of a contact holder showing contacts in a first position being assembled to the contact holder.
b is a perspective view of a contact holder showing contacts in a second position being assembled to the contact holder.
c is a perspective view of a contact holder showing contacts in a third position being assembled to the contact holder.
Referring now to
As shown in
To operate the sensor-dispensing instrument 10, the puller handle 32 is first manually pulled from a standby position (
The puller handle 32 is then manually pushed inwardly from the extended position back past the standby position (
Turning now to
As shown in
The contacts 408 are adapted to interact with the generally horizontal surface 406 of the opening 402 in order to secure a test sensor in the testing position, as shown in
To ensure that sufficient force is exerted on the test sensor 302 by the contacts 408, the contacts 408 are designed to have a pre-load. The pre-load of the contacts 408 is achieved by designing the contacts 408 such that the generally horizontal surface 406 touches the contacts 408, compressing the contacts 408 an amount. According to one embodiment it is contemplated that the contacts are compressed about 0.008 inch. When the test sensor 302 enters the opening 402 the contacts 408 compress even further to about 0.025 inch, creating additional force between the contacts 408, the test sensor 302, and the generally horizontal surface 406, thus securing the test sensor 302. The contact holder 420 restrains the contacts on three sides, helping to prevent or inhibit permanent deformation of the contacts 408 during operation. As can be seen in
After a sample has been tested by the test sensor 302, a sensor release button 416 is depressed to remove the test sensor from sensor-dispensing instrument. The sensor release button 416 extends beyond an outer surface of an outer housing of the sensor-dispensing instrument. According to one embodiment the sensor release button 416 is spring-loaded to bias the sensor release button 416 to a position extending beyond the outer surface of the outer housing. The sensor release button 416 is adapted to displace the sensor support frame 418 in the direction shown by arrow B in
Turning now to
As shown in
A multi-contact sensor connector for use with a sensor-dispensing instrument adapted to handle a sensor pack containing a plurality of sensors, each of the sensors having a plurality of electrical contacts, the multi-contact sensor connector comprising:
a test sensor support frame forming an opening therethrough, the opening being adapted to allow a test sensor to pass through, the test sensor support frame having an inclined surface region adapted to guide a test sensor into the opening and a generally horizontal surface region adapted to support the test sensor in the opening;
a printed circuit board connector surface;
a plurality of contacts adapted to interact with the electrical contacts of the sensors, the contacts being positioned to secure the test sensor between the contacts and the generally horizontal surface region of the test sensor support frame, the contacts being compressed by the test sensor support frame, the contacts further being fixed relative to the printed circuit board connector surface; and
a contact holder adapted to retain the plurality of contacts and to electrically isolate the respective contacts from one another.
The multi-contact sensor connector of alternative embodiment A wherein the contacts are compressed from about 0.008 inch to about 0.025 inch.
The multi-contact sensor connector of alternative embodiment A wherein the contact holder of the test sensor support frame further has a first sidewall and a second sidewall, the first sidewall being spaced apart from the second sidewall generally a width of the test sensor, the first sidewall and the second sidewall being adapted to laterally position the test sensor relative to the plurality of contacts.
The multi-contact sensor connector of alternative embodiment A further comprising: a sensor release button adapted to displace the sensor support frame from the contacts to release the sensor when the sensor release button is depressed.
The multi-contact sensor connector of alternative embodiment D wherein the sensor release button is spring-loaded to return the sensor support frame to a position such that the contacts are compressed by the sensor support frame when the sensor release button is not depressed.
The multi-contact sensor connector of alternative embodiment D wherein the contacts are fixed in place within a contact holder.
The multi-contact sensor connector of alternative embodiment A wherein the plurality of contacts have generally identical profiles.
A multi-contact sensor connector for use with a sensor-dispensing instrument adapted to handle a sensor pack containing a plurality of sensors, each of the sensors having a plurality of electrical contacts, the multi-contact sensor connector comprising:
a test sensor support frame forming an opening therethrough, the opening being adapted to allow a test sensor to pass through, the test sensor support frame having an inclined surface region adapted to guide a test sensor into the opening and a generally horizontal surface region adapted to support the test sensor in the opening;
a plurality of contacts adapted to interact with the electrical contacts of the sensors, the contacts being fixedly positioned opposite the generally horizontal surface region of the test sensor support frame to secure the test sensor between the contacts and the generally horizontal surface region of the test sensor support frame, the contacts being compressible by the test sensor support frame;
a contact holder adapted to retain the plurality of contacts, the contact holder having a first sidewall and a second sidewall; and
a sensor release button adapted to vertically displace the sensor support frame from the contacts, thereby releasing the test sensor when the sensor release button is depressed;
wherein, the first sidewall and the second sidewall are adapted to laterally position the test sensor relative to the plurality of contacts.
The multi-contact sensor connector of alternative embodiment H wherein the contacts are compressed from about 0.008 inch to about 0.025 inch.
The multi-contact sensor connector of alternative embodiment H wherein the sensor release button is spring-loaded to return the sensor support frame to a position such that the contacts are compressed by the sensor support frame when the sensor release button is not depressed.
The multi-contact sensor connector of alternative embodiment H wherein the plurality of contacts are contained within a contact holder adapted to electrically isolate the respective contacts.
An electrical contact carrier assembly for use with a multi-contact sensor connector comprising:
a plurality of electrical contacts having a generally identical profile; and
a removable attachment member adapted to removably connect the plurality of electrical contacts and providing proper lateral spacing between the contacts.
While the invention is susceptible to various modifications and alternative forms, specific embodiments and methods thereof have been shown by way of example in the drawings and are described in detail herein. It should be understood, however, that it is not intended to limit the invention to the particular forms or methods disclosed, but, to the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US2006/020844 | 5/31/2006 | WO | 00 | 11/26/2007 |
Number | Date | Country | |
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60686389 | Jun 2005 | US |