Methods and apparatus for implementing coupling of an electronics unit of a continuous analyte monitoring device to a base unit

Abstract

A coupling tool (400) for coupling together an electronics unit and a base unit of a wearable device for continuous analyte monitoring, such as continuous glucose monitoring, includes a carrier (404) comprising a receiving feature and a carrier retention device (632) configured to retain an electronics unit in proximity to the receiving feature. The coupling tool also includes an activator (402) comprising a first component at least partially receivable in the receiving feature and a contact component (514) configured to release the electronics unit from the carrier retention device in response to movement of the activator relative to the carrier. The coupling tool is in a locked configuration when the carrier retention device (632) is configured to retain the electronics unit and in an unlocked configuration when the carrier retention device (632) is configured to release the electronics unit from the carrier retention device (632). Other embodiments and methods are also disclosed. Because the wearable device and associated electronics unit can be very small so as not to interfere with the movement of the user or annoy the user, the coupling tool (400) can facilitate manually coupling together the electronics unit and the base unit.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 075,258, filed September 7, 2020, the disclosure of which is incorporated herein by reference in its entirety for all purposes. TECHNICAL FIELD

[0003] Embodiments of the present disclosure relate to methods and apparatuses of wearable analyte monitoring devices used during continuous analyte monitoring. BACKGROUND

[0004] Continuous analyte monitoring of in vivo samples, such as continuous glucose monitoring (CGM), has become a routine sensing operation in, among other things, diabetes care. By providing real-time blood glucose concentrations, therapeutic and / or clinical actions can be applied in a timely manner, and blood glucose status can be better controlled.

[0005] During CGM, a biosensor is typically inserted subcutaneously and continuously operates in an environment surrounded by interstitial fluid. The biosensor provides signals to a processor or the like within the CGM system for calculating the blood glucose level of the user. These calculations can be performed automatically many times throughout the day, such as every few minutes or at some other suitable interval.

[0006] A CGM system can include a wearable device that adheres to the outer surface of the user’s skin. The wearable device can communicate (e.g., wirelessly) with a receiving unit, which can be a handheld unit carried by the user. The handheld unit can be, for example, a smartphone. SUMMARY

[0007] In some embodiments, a coupling tool for coupling together an electronics unit and a base unit of a wearable device for continuous analyte monitoring is provided. The coupling tool includes a carrier comprising a receiving feature and a carrier retention device configured to retain the electronics unit proximate to the receiving feature, and an activator including a first component at least partially receivable in the receiving feature, and a contact component configured to release the electronics unit from the carrier retention device in response to movement of the activator relative to the carrier. The coupling tool is in a locked configuration when the carrier retention device is configured to retain the electronics unit, and the coupling tool is in an unlocked configuration when the carrier retention device is configured to release the electronics unit from the carrier retention device.

[0008] In some embodiments, a method is provided for coupling an electronic unit of a wearable device of a continuous analyte monitoring system to a base unit. The method includes: holding the electronic unit to a carrier of a coupling tool using a carrier holding device; positioning the electronic unit near the base unit; and engaging the carrier holding device with an activator of the coupling tool, wherein the engagement releases the electronic unit from the carrier holding device.

[0009] In some embodiments, a connection tool is provided. The connection tool includes: a carrier including a receiving feature; a carrier holding device attached to the carrier, the carrier holding device including a first arm and a second arm and configured to hold an electronic unit near the receiving feature; and an activator including: a first component at least partially receivable in the receiving feature and configured to contact the electronic unit in response to the connection tool being in an unlocked configuration; and a contact component configured to release the electronic unit from the carrier holding device and connect the electronic unit to a base unit of a wearable device of a continuous analyte monitor in response to the connection tool being in an unlocked configuration.

[0010] Other features, aspects, and advantages of embodiments according to this disclosure will be more fully understood from the following detailed description, claims, and drawings, by illustrating several exemplary embodiments. Various other and different applications are also permitted according to the various embodiments of this disclosure, and several details therein may be modified without departing from the scope of the claims. Accordingly, the drawings and descriptions should be considered illustrative rather than restrictive in nature. The drawings are not necessarily drawn to scale. Attached Figure Description

[0011] Figure 1A and 1B Top isometric view and side front view of a wearable device used during continuous analyte monitoring according to embodiments provided herein are shown respectively.

[0012] Figure 1C An exploded isometric view of an example embodiment of the embodiments provided herein is shown, illustrating some of the components that make up a wearable device for use during continuous analyte monitoring.

[0013] Figure 1D An isometric view of the base unit of a wearable device without electronic units attached thereto, according to embodiments provided herein.

[0014] Figure 1E Examples of embodiments provided herein are shown. Figure 1C An enlarged isometric view of the base structure of the base unit.

[0015] Figure 1FA top isometric view showing a base unit and an electronics unit according to embodiments provided herein. Figure 1C An enlarged isometric partial exploded view of an electronics unit positioned over a base structure according to embodiments provided herein.

[0016] Figure 1G A top isometric view showing another embodiment of a base unit and an electronics unit according to embodiments provided herein, wherein the electronics unit is positioned within the base structure of the base unit.

[0017] Figure 1H An exploded view showing an alternative embodiment of a base structure and an electronics unit according to embodiments provided herein.

[0018] Figure 2 An exploded view showing an electronics unit of a wearable device for use during continuous analyte monitoring according to embodiments provided herein.

[0019] Figure 3A A cross-sectional side view showing a wearable device for use during continuous analyte monitoring according to embodiments provided herein, showing the electronics unit removed from the base unit.

[0020] Figure 3B A cross-sectional side view showing a wearable device for use during continuous analyte monitoring according to embodiments provided herein, wherein the electronics unit and the base unit are coupled together. Figure 3A

[0021] Figure 4A A top isometric view showing a coupling tool for coupling an electronics unit of a wearable device for use during continuous analyte monitoring to a base unit according to embodiments provided herein, and an insert for attaching the wearable device to a user.

[0022] Figure 4B A plan view showing an opening in an insert according to embodiments provided herein. Figure 4A

[0023] A side elevational view showing an activator of a coupling tool for coupling an electronics unit of a wearable device for use during continuous analyte monitoring to a base unit according to embodiments provided herein. Figure 5A

[0024] A front elevational view, a top isometric view, and a bottom isometric view showing an activator according to embodiments provided herein, respectively. Figures 5B-5D Figure 5A

[0025] Figure 6A ​​​A top isometric view of a carrier of a coupling tool for coupling an electronics unit of a wearable device for use during continuous analyte monitoring to a base unit according to embodiments provided herein is shown.

[0026] Figures 6B-6D A front elevational view, a bottom isometric view, and a side elevational view of a carrier of a coupling tool according to embodiments provided herein is shown. Figure 6A

[0027] Figure 7A A bottom isometric view of an assembly of a carrier and an activator of a coupling tool for coupling an electronics unit of a wearable device for use during continuous analyte monitoring to a base unit according to embodiments provided herein is shown, with the coupling tool shown holding the electronics unit and the activator received in the carrier.

[0028] Figure 7B A top isometric view of a coupling tool including a carrier of Figure 7A and an activator according to embodiments provided herein is shown.

[0029] Figure 7C A top isometric view of a carrier of a coupling tool according to embodiments provided herein is shown, with an activator received in the carrier but an electronics unit not held by the coupling tool. Figure 7A

[0030] Figure 8A An exploded isometric view of an insert for a wearable device for use during continuous analyte monitoring and a coupling tool configured to couple an electronics unit of the wearable device to a base unit according to embodiments provided herein is shown, with the coupling tool and the electronics unit received in the insert.

[0031] Figure 8B An exploded isometric view of an insert for a wearable device for use during continuous analyte monitoring and a coupling tool configured to couple an electronics unit of the wearable device to a base unit according to embodiments provided herein is shown, with the electronics unit received in the base unit and the coupling tool retracted.

[0032] Figure 9A A cross-sectional side view of an insert of a coupling tool including the coupling tool in a locked configuration according to embodiments provided herein is shown, with an electronics unit held by the coupling tool. Figure 8A

[0033] Figure 9B A cross-sectional side view of an insert of a coupling tool according to embodiments provided herein is shown, with the coupling tool in an unlocked configuration and an electronics unit and a base unit coupled together. Figure 9A ​​​​

[0034] Figure 10 A bottom isometric view showing another example of a wearable device for use in continuous analyte monitoring according to embodiments provided herein, showing the relationship between the electronics unit and the base unit.

[0035] Figure 11 A flowchart showing an example method of coupling an electronics unit of a wearable device for use in a continuous analyte monitoring device to a base unit according to embodiments provided herein. DETAILED DESCRIPTION

[0036] To more closely monitor an individual's analyte level (e.g., blood glucose concentration) and detect changes in the analyte level, methods and apparatus for continuous analyte monitoring (e.g., continuous glucose monitoring (CGM)) have been developed. While CGM systems generate a blood glucose signal (e.g., a continuous electrochemical signal) "continuously" during operation, measurements of the generated blood glucose signal are typically performed every few minutes, rather than truly continuously. While the description below relates to continuous glucose monitoring, the apparatus and methods described below can be readily adapted to monitor other analytes in other continuous analyte monitoring systems, e.g., such as cholesterol, lactic acid, uric acid, alcohol, etc.

[0037] CGM systems typically have a wearable portion ("wearable device") that communicates wirelessly with an external device, e.g., a hand-held monitor or another portable device such as a cellular phone, computer, or server. The wearable device can be worn for days or even weeks (e.g., 1-2 weeks) before being removed and replaced. The wearable device includes a subcutaneously inserted (implanted) biosensor. The wearable device can also include circuitry coupled to the biosensor that is configured to bias the biosensor and measure a current signal generated by an electrochemical reaction with components of the implanted biosensor. The wearable device can also include processing circuitry for determining an analyte (e.g., blood glucose) level based on the measured current signal, and electronic transmitter circuitry for transmitting the analyte (e.g., blood glucose) level to the external device. The wearable device can be attached (e.g., adhered) to an external surface of the skin, e.g., to the abdomen, the back of the upper arm, or another suitable location. The CGM system measures the analyte (e.g., blood glucose) concentration or analyte level in interstitial fluid or a sample of non-direct capillary blood.

[0038] CGM systems can provide frequent measurements of a user's analyte (e.g., blood glucose) level without requiring a blood sample to be drawn, e.g., by finger prick, each time such a measurement is made. CGM systems can still occasionally employ finger pricking and use of a blood glucose measurement (BGM) system, such as the Contour NEXT® EZ Blood Glucose Meter by Ascensia Diabetes Care AG of Basel Switzerland. for checking calibration of a CGM system.

[0039] As described above, the wearable devices of CGM systems are typically worn for a period of time and then removed and replaced with a new wearable device. The necessity to replace the wearable devices of CGM systems after a designed interval can significantly increase the cost of performing such continuous analyte monitoring.

[0040] In embodiments described herein, a wearable device can include a base unit (e.g., disposable portion) and an electronics unit (e.g., reusable portion). In some embodiments, the base unit can include a power source for the wearable device, an analyte sensor (biosensor), and / or other electronic components. The electronics unit can include, for example, electronic circuitry for providing a bias voltage to the analyte sensor and measuring a current signal via the analyte sensor, and can also calculate analyte concentration values, such as blood glucose concentration values, based on the measured current signal, and / or transmit analyte concentration value information to an external device.

[0041] In some embodiments, the electronics unit can include a power supply for the wearable device. Example circuitry within the electronics unit can also include an analog front end for biasing the analyte sensor and for sensing current through the analyte sensor, such as an operational amplifier, current sensing circuitry, etc. Other circuitry within the electronics unit can include processing circuitry, such as an analog-to-digital converter (ADC) for digitizing the current signal, a memory for storing the digitized current signal, a controller, such as a microprocessor, microcontroller, etc., for calculating blood glucose concentration values based on the measured current signal, and transmitter / receiver circuitry for transmitting blood glucose concentration values to an external device and / or receiving instructions from an external device.

[0042] The electronics unit is typically the most expensive portion of the wearable device, and can be used for a time period that is significantly longer than the period in which the wearable device is employed. For example, the wearable device is typically discarded after two weeks, while the electronics unit can be reused with 10, 20, 50, 100, or even more base units.

[0043] The wearable device can be very small so as not to interfere with the movement of the user or annoy the user. As such, the electronics unit can be small, which can make it difficult to manually couple the electronics unit and the base unit together. As such, coupling tools and methods of coupling a reusable electronics unit to a base unit are provided. Reference is made below to Figures 1A-11 These and other embodiments are described.

[0044] Reference is now made to Figures 1A-1H which shows various views of a wearable device 100 and components thereof for use during continuous analyte monitoring. Figures 1A-1B A wearable device 100 according to embodiments provided herein is shown. Figure 1C An exploded isometric view of an example embodiment of components located within the wearable device 100 is shown. Figure 1D An isometric view of a base unit 102 of the wearable device 100 without an electronics unit located therein is shown. Figure 1C Components of the wearable device 100 can be located Figure 1D within the base unit 102 of the wearable device 100, which can be overmolded to, for example, hold the components. Figures 1E-1H Various isometric views of an example of a base structure included in the base unit 102 are shown.

[0045] The wearable device 100 can include a base unit 102 (e.g., a disposable base unit) and an electronics unit 104 (e.g., a reusable electronics unit) that interface and couple to one another to form the wearable device 100. The electronics unit 104 is sometimes referred to as a transmitter unit. The base unit 102 can include a cavity or opening 106 or other coupling structure that receives the electronics unit 104. Devices and methods are disclosed herein that enable a user to couple the electronics unit 104 to the base unit 102. In some embodiments, the base unit 102 is configured to be disposed of after a single analyte monitoring period (e.g., 7 days, 10 days, 14 days, or some other period of time), while the electronics unit 104 is configured to be removed from the base unit 102 after a single analyte monitoring period and reused with another base unit. For example, the electronics unit 104 can be reused with 2, 5, 10, 50, 100, or more new base units.

[0046] In some embodiments, the base unit 102 is sealed. For example, an encapsulation layer 108 can be formed over the components within the base unit 102. In some embodiments, the encapsulation layer 108 can include an opening 106 that allows the electronics unit 104 to be coupled to the base unit 102. In some embodiments, the encapsulation layer 108 forms a waterproof seal around the base unit 102 and its internal components. Connectors 110 can remain exposed, for example, in the opening 106, so that connectors on the electronics unit 104 can be electrically connected with the connectors 110. The encapsulation layer 108 can be formed from a single layer or multiple layers. For example, the encapsulation layer 108 can be formed from one or more layers of liquid silicone rubber (LSR), thermoplastic elastomer (TPE), etc. Other suitable sealing materials can be used.

[0047] The base unit 102 can include an analyte sensor 114 Figure 1C that is electrically coupled to the connectors 110 and is operable to generate an electrical signal in response to contact with and reaction of interstitial fluid. The electrical signal can be transmitted to the electronics unit 104, where it is measured. The electronics unit 104 or an external device (not shown) can determine a blood glucose concentration (or a concentration of another analyte) based at least in part on the measured electrical signal.

[0048] Figure 1C and 1E -1H shows exploded isometric and other isometric views of an example embodiment of some components that can be located within a base unit 102 of a wearable device 100 that includes an electronics unit 104. As shown, the base unit 102 can include a base structure 116 that holds the components within the base unit 102, which can be a chassis or the like. Some embodiments of the base structure 116 can have one or more power source support locations 118A-118B, an electronics unit support location 120, and a sensor assembly support location 122. In some embodiments, the base structure 116 can be formed from, for example, plastic, such as, but not limited to, acrylonitrile butadiene styrene (ABS), polycarbonate, nylon, acetal, polyphthalamide (PPA), polysulfone, polyethersulfone, polyether ether ketone (PEEK), polypropylene, high density polyethylene (HDPE), and low density polyethylene (LDPE). Other suitable materials can be used.

[0049] Power support locations 118A and 118B provide positions for supporting one or more power sources 124A and 124B for supplying power to components of the wearable device 100, such as to the electronics unit 104. For example, one or more power sources 124A and 124B may be located at power support locations 118A and 118B. In some embodiments, the one or more power sources 124A and 124B may be batteries, storage capacitors, solar cells, generators, etc. Although power sources 124A and 124B are shown as two batteries, it should be understood that fewer, more, and / or different power sources may be used. Power support locations 118A and 118B may be any suitable shape (e.g., rectangular, square, circular, etc.) to receive the one or more power sources 124A and 124B. In some embodiments, power sources 124A and 124B may be located within the electronics unit 104.

[0050] The electronic unit support location 120 is configured to retain the electronic unit 104 coupled to or otherwise attached to the base unit 102. In some embodiments, the electronic unit support location 120 may include one or more first retaining features 126. In some embodiments, the electronic unit support location 120 may include four first retaining features 126, which are individually referred to as first retaining features 126A-126D. The first retaining features 126 may interface with and / or abut against second retaining features 128 on the electronic unit 104, which are individually referred to as second retaining features 128A-128D, to couple and retain the electronic unit 104 to the base structure 116 of the base unit 102, such as, for example... Figure 1G As shown in the diagram. More, fewer, and / or different retaining features can be used to secure the electronic unit 104 to the substrate structure 116. The first retaining feature 126 may include, for example, a protrusion that engages the opening of the second retaining feature 128 in the electronic unit 104. In some embodiments, the first and second retaining features 126, 128 may include magnets, Velcro, surfaces with adhesive, etc.

[0051] In some embodiments, the electronic unit support location 120 may include a break location 131. Figure 1C , 1F (And 1G), such as channels, grooves, cleavage lines, etc., which allow the substrate structure 116 to bend and / or break, such that when the electronic unit 104 is removed from the substrate unit 102 and / or the substrate structure 116, the first retaining feature 126 disconnects and / or releases the electronic unit 104. Other release and / or breakage locations may be used. In some embodiments, other retaining features may be used to retain the electronic unit 104, wherein the other retaining features do not require bending the substrate structure 116 to remove the electronic unit 104.

[0052] A substrate 130, such as a circuit board, flexible circuit board, etc., can be positioned within the electronics unit support location 120 and can include a connector 110 that provides an electrical interface to a similar connector (not shown) on the electronics unit 104. For example, the connector 110 can be electrically connected by conductors (not shown) to the power sources 124A, 124B to allow the power sources 124A, 124B to provide power to the electronics unit 104 when the electronics unit 104 is positioned within the electronics unit support location 120. The connector 110 can also be electrically connected to the analyte sensor 114 to provide a voltage to the analyte sensor 114.

[0053] Figure 1H An exploded isometric view of another alternative embodiment of the electronics unit 104 with other examples of first and second retention features 132, 134 that hold the electronics unit 104 within the base structure 116A. In the embodiment of FIG. 2, the electronics unit 104 has the first retention feature 132 and the base structure 116A has the second retention feature 134. The first retention feature 132 on the electronics unit 104 can extend into the second retention feature 134 on the base structure 116A, which is an opening configured to receive the first retention feature 132. Figure 1C Figure 1H In the embodiment of FIG. 2, the electronics unit 104 has the first retention feature 132 and the base structure 116A has the second retention feature 134. The first retention feature 132 on the electronics unit 104 can extend into the second retention feature 134 on the base structure 116A, which is an opening configured to receive the first retention feature 132.

[0054] The sensor assembly support location 122 provides a mounting location for at least a portion of an analyte sensor assembly 139 that can include, for example, an insertion device 140 and an insertion device cover 142. The insertion device 140 can include an insertion portion 144 that includes a sharp end 146 (shown in FIG. 3) that pierces the skin to introduce the analyte sensor 114 into a user's subcutaneous region, as described herein. The insertion portion 144 can also be referred to as an insertion shaft, a needle, a trocar, a sharp, etc. Figure 1C

[0055] The insertion portion 144 of the insertion device 140 can be made, for example, of a metal such as stainless steel or a non-metal such as plastic. Other materials can be used. In some embodiments, the insertion portion 144 of the insertion device 140 can be, but is not limited to, a C-channel round tube, a U-channel round tube, a stamped sheet metal part folded into a square U-shaped configuration, a molded / cast, laser cut or machined metal part with a U-channel configuration, or a solid metal cylinder with an etched or milled square U-channel. Other insertion portion shapes can be used. The channel formed in the insertion portion 144 carries the analyte sensor 114 during insertion. In some embodiments, portions of the insertion device 140 can be formed of a plastic such as, but not limited to, ABS, polycarbonate, nylon, acetal, PPA, polysulfone, polyethersulfone, PEEK, polypropylene, HDPE, LDPE, etc. Other materials can be used.​​

[0056] The insertion portion 144 can extend, for example, through a sensor opening 150 in the sensor assembly support location 122 of the base structure 116, 116A. Figure 1F The analyte sensor 114 is electrically connected to a connector 110 of the substrate 130 within the electronics unit support location 120. The connector 110 electrically connects the analyte sensor 114 to the electronics unit 104 positioned within the electronics unit support location 120.

[0057] The first and second retention features 126, 128, 132, 134 described herein secure (e.g., couple) the electronics unit 104 to the base structure 116, 116A of the base unit 102 during a continuous analyte monitoring period, while allowing the electronics unit 104 to be removed and reused after the continuous analyte monitoring period. The base unit 102 can be configured to be disposed after a single analyte monitoring period, while the electronics unit 104 can be configured to be separated from the base unit 102 after a single analyte monitoring period and reused with other base units. For example, the base structure 116 can be bent along the break location 131, releasing the first retention feature 126 from the electronics unit 104. Figure 1F In some embodiments, a single analyte monitoring period can be at least 7 to 10 days (and, for example, up to 14 days or more). The electronics unit 104 can be removed from the base unit 102 and reused (e.g., 5, 10, 20, 50, 100, or more times, each time with a new base unit 102 including a new analyte sensor 114).

[0058] Figure 2 An exploded view showing an example of the electronics unit 104 according to some embodiments provided herein is shown. In Figure 2 In embodiments, the electronics unit 104 can include a substrate 202 coupled to a top cover 204 and can be covered by a bottom cover 206 (e.g., an overmolded portion) to cover and seal the substrate 202 and any components 208 thereon. The substrate 202 can be a circuit board, a flexible circuit board, or another mounting location for electronic circuitry used within the electronics unit 104. The top cover 204 and / or the bottom cover 206 can be formed from one or more layers of liquid silicone rubber (LSR), thermoplastic elastomer (TPE), molded plastic cover, etc. Other materials can be used, such as (but not limited to) ABS, polycarbonate, nylon, acetal, PPA, polysulfone, polyethersulfone, PEEK, polypropylene, HDPE, LDPE, etc.

[0059] The substrate 202 can include an interface 212 (e.g., a connector) configured to electrically connect with the connector 110 of the base unit 102 when the electronics unit 104 is positioned within the electronics unit support location 120 of the base structure 116.Figure 1C Interfacing. For example, an opening 214 in the bottom cover 206 may be provided to allow interface 212 to be connected to connector 110 of base unit 102. In some embodiments, one or more of components 208 may be electrically connected to analyte sensor 114 via interface 212 and connector 110 of base unit 102.

[0060] In some embodiments, the bottom cover 206 may include a sealing member 216, such as a lip or similar feature, configured to seal against the sidewall or other portion of the opening 106 of the base unit 102 (see also below). Figure 3A and 3B This allows the electronic unit 104 and the base unit 102 to form a sealed unit when the electronic unit 104 is positioned within the base unit 102. In some embodiments, the top cover 204 may include one or more of the second retaining features 128, which are configured to interact with the first retaining features 126A-126D within the electronic unit support position 120. Figure 1C The first and second retaining features may interface (e.g., one or more of the first retaining features 126). These first and second retaining features may interface to securely hold the electronic unit 104 to the base unit 102 and retain the connector 110 in contact with the interface 212 during use. In other embodiments, the top cover 204 may include a sealing element, and / or the bottom cover 206 may include retaining features.

[0061] Figure 3A A cross-sectional view of a wearable device 100 according to some embodiments is shown, wherein the electronic unit 104 is removed from the base unit 102. Figure 3B Illustrations based on some embodiments Figure 3A A cross-sectional view of a wearable device 100, wherein an electronics unit 104 and a base unit 102 are coupled together. As described herein, both the electronics unit 104 and the base unit 102 may be hermetically sealed units (e.g., waterproof), wherein only the interface 212 of the electronics unit 104 and the connector 110 of the base unit 102 are exposed. When the electronics unit 104 is coupled to the base unit 102, the connector 110 and the interface 212 are also sealed from any external environment.

[0062] Now for reference Figure 4A It shows that it can be used to integrate electronic unit 104 ( Figure 1B Connected to wearable device 100 ( Figure 1BFIG. 6 shows a side isometric view of a coupling tool 400 of the base unit 102 of the wearable device 100 of FIG. 1. The coupling tool 400 can be used to couple other electronic units and base units of other types of wearable devices together. The coupling tool 400 includes and is comprised of an activator 402 and a carrier 404. The coupling tool 400 can be used with an insert 406 that enables a user to attach the wearable device 100 to the user, as described herein. Generally, the base unit 102 without an electronic unit 104 coupled thereto can be held within the insert 406 (see Figure 8A ). The electronic unit 104 is held and retained by the carrier 404, and the carrier 404 and the electronic unit 104 are inserted into an opening 422 in a top of the insert 406 in order to position the carrier 404 and the electronic unit 104 within the insert 406 (see Figure 9A ). The activator 402 is then moved relative to (e.g., within, in some embodiments) the carrier 404, causing the activator 402 to release the electronic unit 104 from the carrier 404 and couple the electronic unit 104 to the base unit 102 (see Figure 9B ).

[0063] When the coupling tool 400 is configured to release the electronic unit 104, the coupling tool 400 can be said to be in an unlocked configuration. When the coupling tool 400 is configured to retain the electronic unit 104, the coupling tool 400 can be said to be in a locked configuration.

[0064] Reference is additionally made to Figures 5A-5D , which shows various views of the activator 402 according to the embodiments provided herein. Figure 5A shows a side elevation view of the activator 402, Figure 5B shows a front elevation view of the activator 402, Figure 5C shows a top isometric view of the activator 402, and Figure 5D shows a bottom isometric view of the activator 402. The activator 402 can include a top portion 510 having a top surface 510S. The top surface 510S can be configured to be pressed by a user during coupling of the electronic unit 104 to the base unit 102.

[0065] The first component 512 can extend a length L51 from the top portion 510 to an end 512A. The end 512A can be configured to contact the electronic unit 104 as the electronic unit 104 and the base unit 102 are coupled together. For example, the end 512A can be configured to contact a top cover 204 of the electronic unit 104 (see Figure 2). The first component 512 can be sufficiently rigid to withstand forces exerted between the electronics unit 104 and the base unit 102 during coupling. In some embodiments, the activator 402 can be referred to as in a locked position or configuration when the end 512A does not contact the electronics unit 104, and the activator 402 can be referred to as in an unlocked position when the end 512A contacts the electronics unit 104. In the unlocked position, the electronics unit 104 is no longer held. The length L51 can be long enough to push the electronics unit 104 from the carrier 404 when the activator 402 is in the unlocked position as described herein.

[0066] The activator 402 can also include a contact component 514 extending from the top portion 510. The contact component 514 can extend a length L52 between the top portion 510 and an end 514A of the contact component 514. The contact component 514 can engage a movable or flexible component of the carrier 404 to release the electronics unit 104 from the carrier 404 when the activator 402 is in the unlocked configuration or as the carrier 404 transitions from the locked configuration to the unlocked configuration as described herein.

[0067] Reference is additionally made to Figures 6A-6D which show different views of an embodiment of the carrier 404. Figure 6A showing a top isometric view of the carrier 404, Figure 6B showing a front elevational view of the carrier 404, Figure 6C showing a bottom isometric view of the carrier 404, and Figure 6D showing a side elevational view of the carrier 404.

[0068] The carrier 404 can be configured to carry the electronics unit 104 to the base unit 102 and / or the insert 406. The carrier 404 can have a first side 616A (e.g., a bottom side) and a second side 616B (e.g., a top side). A length L61 extends between the first side 616A and the second side 616B. In some embodiments, the length L61 can be slightly less than the length L51 of the first component 512 of the activator 402 Figure 5A ). The carrier 404 can have a receiving feature 618 (e.g., a rectangular hole as shown) extending between the first side 616A and the second side 616B. The receiving feature 618 can be shaped and / or sized to receive at least a portion of the first component 512 of the activator 402 and enable the first component 512 to move (e.g., slide) within the receiving feature 618. The receiving feature 618 can include a receiving feature first end 618A and a receiving feature second end 618B, with the electronics unit 104 configured to be held by the carrier 404 when the coupling tool 400 is in the locked configuration, for example, when the electronics unit 104 is held by the carrier 404 (see Figures 7A-7B), positioned proximate to the first end 618A of the receiving feature. The receiving feature 618 is shown as a bore. In other embodiments, the receiving feature 618 can be a slot, a groove, or other feature that performs the functions described herein.

[0069] The carrier 404 can have an outer surface that defines a lateral shape of the carrier 404 when viewed from the first side 616A or the second side 616B. The lateral shape of the carrier 404 enables the carrier 404 to be received within an opening 422 in the insert 406, as described herein. For example, the carrier 404 can include a shape configured to allow the carrier 404 to slide within the opening 422. In some embodiments, the lateral shape of the carrier 404 can be the same as the opening 422, but slightly smaller to enable the carrier 404 to move within the opening 422 with minimal friction. Figure 4B

[0070] Reference is additionally made to Figure 4B , which shows a plan view of the opening 422 according to embodiments provided herein. The carrier 404 can include one or more indexing devices that orient the carrier 404 within the opening 422 in a particular direction. In Figure 4B and 6A embodiments of the 6D, the carrier 404 includes two rails: a first rail 624A and a second rail 624B that extend from the outer surface and orient the carrier 404 within the opening 422. The first rail 624A and the second rail 624B can be received within a first channel 426A and a second channel 426B, respectively, of the opening 422. The positions of the first rail 624A, the second rail 624B, the first channel 426A, and the second channel 426B enable the carrier 404 to be received within the opening 422 in only one orientation. For example, in Figure 4B embodiments, the opening 422 includes a first side 422A and an opposite second side 422B. Both the first channel 426A and the second channel 426B can be located a length L41 from the first side 422A and a length L42 from the second side 422B, where the length L41 is not equal to the length L42. Accordingly, the positions of the first channel 426A and the second channel 426B enable the carrier 404 to be received within the opening 422 in only one orientation. The one orientation enables proper coupling of the electronic unit 104 and the base unit 102. Other indexing and / or orientation mechanisms can be used.

[0071] The carrier 404 is configured to hold the electronic unit 104, as shown in Figure 7A and 7B , which are bottom and top isometric views, respectively, of an embodiment of the carrier 404 holding the electronic unit 104 and having the activator 402 received therein. In some embodiments, the carrier 404 can have a cavity 630 Figure 6A ​-C and 7C), which are configured (e.g., shaped and sized) to receive electronic unit 104. Cavity 630 may be located near the first side 616A of carrier 404 and may be connected to receiving feature 618 ( Figure 6A The first component 512 of the activator 402 intersects with the end 512A of the first component 512. Figures 5A-5D The electronic unit 104 is accessible. For example, the cavity 630 may be in or near the first end 618A of the receiving feature 618. The first component 512 of the activator 402 is accessible to the electronic unit 104 to force the electronic unit 104 and the base unit 102 together, such as... Figure 9B As shown. In some embodiments, cavity 630 is configured to keep electronic unit 104 flush with the first side 616A of carrier 404.

[0072] In some embodiments, the carrier 404 may include one or more retaining devices configured to retain the electronic unit 104 to the carrier 404, for example, within the cavity 630 or at an end of the carrier 404. When the carrier 404 retains or is configured to retain the electronic unit 104, the carrier 404 and / or the one or more retaining devices may be in a locked configuration or locked state. When the electronic unit 104 is released from the carrier 404 or the carrier 404 is configured to release the electronic unit 104, the carrier 404 and / or the one or more retaining devices may be in an unlocked configuration or unlocked state. Figures 6A-7C In some embodiments, the carrier 404 may include a carrier holding device 632 configured to hold the electronic unit 104 within, for example, a cavity 630, and to allow the contact portion 514 of the activator 402 to ( Figure 4A The electronic unit 104 can be released from cavity 630. For example, contact member 514 ( Figures 5A-5D (7A-7C) can be configured to release electronic unit 104 from carrier holding device 632 in response to movement of activator 402 relative to carrier 404.

[0073] The carrier holding device 632 may include one or more hooks for holding the electronic unit 104 to the carrier 404. Figures 6A-7CIn some embodiments, the carrier holding device 632 may include a first arm 634 having a first hook 636A and a second arm 635 having a second hook 636B. The first arm 634 may pivot or flex about a first point 638A, and the second arm 635 may pivot or flex about a second point 638B. In some embodiments, the first point 638A and the second point 638B may be locations where the first arm 634 and the second arm 635 are connected to a body portion of the carrier 404. In some embodiments, the first arm 634 and the second arm 635 are flexible such that they flex after interacting with or engaging with a contact member 514 of the activator 402 as described herein to release the electronic unit 104 from the cavity 630. The first arm 634 and the second arm 635 may be separated from the body of the carrier 404 by a gap.

[0074] The first hook 636A and the second hook 636B may be configured to grip and / or retain the electronic unit 104 to the carrier 404 when the carrier 404 is in a locked configuration. In some embodiments, the first hook 636A and the second hook 636B may be configured to engage a retaining feature of the electronic unit 104 (e.g., Figure 2 The two holding features (128A-D) shown in the diagram are used to hold the electronic unit 104 in the cavity 630. Figures 7A-7B In the embodiment depicted, a first hook 636A is shown engaging with a retaining feature 128C, and a second hook 636B is shown engaging with a retaining feature 128A, the retaining feature holding the electronic unit 104 in the cavity 630.

[0075] The first arm 634 may have an inner surface 634S ( Figure 6B The second arm 635 may have an inner surface 635S facing the inner surface 634S. The inner surfaces 634S and 635S may guide the contact member 514 of the activator 402 between the first arm 634 and the second arm 635. The first arm 634 may also have a first protrusion 634P that includes a portion of the inner surface 634S. The second arm 635 may also have a second protrusion 635P that includes a portion of the inner surface 635S. The first protrusion 634P and the second protrusion 635P may be configured to contact the contact member 514 as the activator 402 is switched to an unlocked configuration, which switches the carrier 404 to an unlocked configuration and releases the electronic unit 104, as described herein.

[0076] When the activator 402 is in the locked configuration, the carrier 404 is in the locked configuration. In some embodiments, the first arm 634 and the second arm 635 can be biased toward each other such that the carrier 404 can be normally in the locked configuration. In some embodiments, the first hook 636A and the second hook 636B can be normally biased toward each other such that the carrier 404 is normally in the locked configuration. As the contact member 514 of the activator 402 engages the first protrusion 634P and the second protrusion 635P, the first hook 636A and the second hook 636B disengage each other, which places the carrier 404 in the unlocked configuration and releases the electronic unit 104 from the cavity 630. For example, the first arm 634 and the second arm 635 flex or pivot about the first point 638A and the second point 638B. Thus, the carrier 404 transitions to the unlocked configuration and the electronic unit 104 is released from the carrier 404. The position of the first protrusion 634P on the first arm 634 and the position of the second protrusion 635P on the second arm 635 determine the distance that the contact member 514 is positioned within the carrier 404 when the activator 402 engages the carrier retention device 632 and transitions the carrier 404 between the locked configuration and the unlocked configuration.

[0077] As the contact member 514 of the activator 402 releases the electronic unit 104 from the carrier 404, the first member 512 of the activator 402 can eject the electronic unit 104 from the carrier 404. For example, the end 512A of the first member 512 can contact the electronic unit 104 and force the electronic unit 104 and the base unit 102 together. The length L51 of the first member 512 and the length L52 of the contact member 514 can enable the carrier 404 to transition to the unlocked configuration just before the first member 512 ejects the electronic unit 104 from the carrier 404. In some embodiments, the position of the first protrusion 634P and the second protrusion 635P on the first arm 634 and the second arm 635 can also enable the carrier 404 to transition to the unlocked configuration before the first member 512 ejects the electronic unit 104 from the carrier 404.

[0078] The electronic unit 104 can be retained in the carrier 404 by forcing the electronic unit 104 into the cavity 630. The force can flex the first arm 634 and the second arm 635 away from each other. As the electronic unit 104 is further pushed into the cavity 630, the first hook 636A and the second hook 636B can engage the second retention feature 128 on the electronic unit 104 to retain the electronic unit 104 within the cavity 630.

[0079] In some embodiments, the insert 406 can be a device that attaches the wearable device 100 to the skin of a user. For example, the insert 406 can enable a user to attach the wearable device 100 to the skin and position the analyte sensor 114 in a subcutaneous region. The wearable device 100 can be attached to the skin of a user before, during, or after the electronics unit 104 is coupled to the base unit 102.

[0080] Reference is now made to Figure 8A and 8B . Figure 8A An exploded isometric view of an embodiment of the insert 406 and the coupling tool 400 according to embodiments provided herein is shown. In the configuration depicted in Figure 8A , the electronics unit 104 is received in the coupling tool 400. Figure 8B An exploded isometric view of an embodiment of the insert 406 and the coupling tool 400 according to embodiments provided herein is shown, with the electronics unit 104 coupled to the base unit 102 (e.g., received within the base unit). In the configuration depicted in Figure 8A , the coupling tool 400 is in a locked configuration in which the electronics unit 104 is held by the carrier 404. The insert 406 depicted herein is an example of one of many inserts that can be used with the coupling tool 400. Inserts used with the coupling tool 400 can have openings 422, etc. that provide access for the coupling tool 400 to openings, etc. on the base unit 102 that receive the electronics unit 104. In some embodiments, a support or another device that supports the base unit 102 during coupling of the base unit 102 and the electronics unit 104 can be used instead of the insert 406.

[0081] The insert 406 can include a top cap 406A that includes an opening 422. As described above, the coupling tool 400 can be at least partially received in the opening 422. The insert 406 can also include an outer sleeve 406B, where the top cap 406A can slide over and be coupled to the outer sleeve 406B. In some embodiments, some portions of the mechanism (not shown in Figure 1D ) that inserts the analyte sensor 114 (not shown in Figures 8A-8B ) in a subcutaneous region of a user can be located within the outer sleeve 406B. The insert 406 can include a base unit support 406C that can be at least partially receivable within an inner sleeve 406D. As shown, the base unit support 406C can be configured to support the base unit 102 during coupling of the electronics unit 104 to the base unit 102. In some embodiments, the insert 406 can include a cover 406E that covers a lower portion of the insert 406 and / or a lower portion of the base unit 102.

[0082] The opening 422 can provide access between the top cover 406A and the opening 106 in the base unit 102 that receives the electronic unit 104. Thus, the opening 422 enables the coupling tool 400, and the electronic unit 104 attached thereto (as shown) to pass into the opening 422. The coupling tool 400 can then be used to couple the electronic unit 104 and the base unit 102 together, as shown. In the example shown, the electronic unit 104 is inserted into the base unit 102. Similarly, the base unit support 406C can have an opening that enables the coupling tool 400, and the electronic unit 104 attached thereto, to pass to couple the electronic unit 104 to the base unit 102. Figure 8A Figure 8B Figure 8B In the example shown, the electronic unit 104 is inserted into the base unit 102. Similarly, the base unit support 406C can have an opening that enables the coupling tool 400, and the electronic unit 104 attached thereto, to pass to couple the electronic unit 104 to the base unit 102.

[0083] Reference is now made to Figures 4A-4C, which show partial cross-sectional views of the insertion 406 having the base unit 102, the electronic unit 104, and the coupling tool 400 positioned therein. In the configuration of Figure 4A, the coupling tool 400 is in a locked configuration, and the electronic unit 104 is held by the coupling tool 400. In the configuration of Figure 4B, the coupling tool 400 is in an unlocked configuration, and the electronic unit 104 has been coupled with the base unit 102. For example, the electronic unit 104 has been inserted into the base unit 102. Figure 9A 9B In the configuration of Figure 4A, the coupling tool 400 is at least partially positioned in the opening 422 and is in the locked configuration. As shown, the activator 402 is not fully inserted into the carrier 404, and thus the contact member 514 does not contact the first protrusion 634P or the second protrusion 635P. Accordingly, the coupling tool 400 is in the locked configuration, at which time the electronic unit 104 is held thereto. Figure 9A Figure 9B In the configuration of Figure 4B, the electronic unit 104 has been inserted into the base unit 102 using the coupling tool 400. As shown, the activator 402 has been pressed into the carrier 404 in the Z direction, which has caused the contact member 514 to contact the first protrusion 634P and the second protrusion 635P. Contact with the first protrusion 634P and the second protrusion 635P has caused the first hook 636A and the second hook 636B to move away from each other, thereby releasing the electronic unit 104 from the carrier 404. As the activator 402 is further pressed into the carrier 404, the end 512S of the first member 512 (as shown) is positioned in the opening 422. Figure 9B

[0084] In the configuration of Figure 4B, the electronic unit 104 has been inserted into the base unit 102 using the coupling tool 400. As shown, the activator 402 has been pressed into the carrier 404 in the Z direction, which has caused the contact member 514 to contact the first protrusion 634P and the second protrusion 635P. Contact with the first protrusion 634P and the second protrusion 635P has caused the first hook 636A and the second hook 636B to move away from each other, thereby releasing the electronic unit 104 from the carrier 404. As the activator 402 is further pressed into the carrier 404, the end 512S of the first member 512 (as shown) is positioned in the opening 422. Figure 9A Figure 9A

[0085] In the configuration of Figure 4B, the electronic unit 104 has been inserted into the base unit 102 using the coupling tool 400. As shown, the activator 402 has been pressed into the carrier 404 in the Z direction, which has caused the contact member 514 to contact the first protrusion 634P and the second protrusion 635P. Contact with the first protrusion 634P and the second protrusion 635P has caused the first hook 636A and the second hook 636B to move away from each other, thereby releasing the electronic unit 104 from the carrier 404. As the activator 402 is further pressed into the carrier 404, the end 512S of the first member 512 (as shown) is positioned in the opening 422. Figure 9B Figure 9B Figures 5A-5D ​​​​​​​The electronic unit 104 is contacted and forced into the opening 106 in the base unit 102. When the electronic unit 104 is attached to the base unit 102, a waterproof seal is formed between the base unit 102 and the electronic unit 104 to prevent contaminants from entering the opening 106.

[0086] With the electronic unit 104 and the base unit 102 connected together, the second retention feature 128 of the electronic unit 104 ( Figure 1F The connector 400 engages with the first retaining feature 126 of the base unit 102 and connects the electronic unit 104 and the base unit 102 together. After the electronic unit 104 and the base unit 102 are connected, the connector 400 can be removed from the insert 406, and the wearable device 100 containing the electronic unit 104 and the base unit 102 can be applied (e.g., attached or bonded) to the user. In some embodiments, the connector 400 can be used to connect the electronic unit 104 and the base unit 102 together after the base unit 102 has been applied to the user.

[0087] Wearable device 100 ( Figure 1A The wearable device 100 can be worn by the user for a period of time, such as two weeks, or until the base unit 102 needs to be replaced and / or removed from the user. During this period, the wearable device 100 can monitor / measure analytes, for example, in the user's subcutaneous area. After analyte monitoring, the wearable device 100 can be detached from the user. The electronic unit 104 of the wearable device 100 can then be disconnected / disconnected from the base unit 102. For example, the electronic unit 104 can be disconnected from the base unit 102, and the base unit 102 can be discarded. Generally, the electronic unit 104 can be disconnected from the base unit 102 before or after the base unit 102 is removed from the user. Subsequently, the electronic unit 104 can be connected to a new base unit using a connection tool 400 as described herein. The new base unit may include a new power supply and a new analyte sensor.

[0088] Although electronic unit 104 is shown attached to the top surface of base unit 102, it should be understood that in other embodiments, electronic unit 104 may be removable and / or attached to other surfaces of the base unit. For example, Figure 10 A bottom view of a base unit 1002 of a wearable device 1000 having an opening 1006 according to an embodiment described herein is shown, the opening allowing the electronic unit 104 and the base unit 1002 to be coupled together using a coupling tool 400 (FIG. 4). In some embodiments, the base unit 1002 may be placed in a device other than an insert that allows the coupling tool 400 to access the opening 1006.

[0089] Now for reference Figure 11which is a flowchart depicting an example of a method 1100 of coupling together an electronics unit (e.g., electronics unit 104) and a base unit (e.g., base unit 102) of a wearable device (e.g., wearable device 100) for use during continuous analyte monitoring. The method 1100 includes, at processing block 1102, holding the electronics unit to a carrier (e.g., carrier 404) using a carrier holding device (e.g., carrier holding device 632). The method 1100 also includes, at processing block 1104, positioning the electronics unit proximate to the base unit. The method further includes, at processing block 1106, engaging the carrier holding device with an activator (e.g., activator 402), where the engagement releases the electronics unit from the carrier holding device. Further movement of the activator couples the electronics unit to the base unit.

[0090] The above description discloses only example embodiments. Modifications to the above-disclosed device and methods will be readily apparent to those of ordinary skill in the art, and the generically skilled reader will readily appreciate modifications to the above-disclosed device and methods that fall within the scope of the present disclosure.

Claims

1. A system comprising: a coupling tool for coupling together an electronics unit and a base unit of a wearable device for continuous analyte monitoring, the coupling tool comprising: a carrier comprising a receiving feature and a carrier retention device configured to engage the electronics unit to retain the electronics unit in proximity to the receiving feature; and an activator comprising: a first component at least partially receivable in the receiving feature and configured to contact the electronics unit to couple the electronics unit to the base unit; a contact component configured to contact at least a portion of the carrier retention device to release the electronics unit from the carrier retention device in response to movement of the activator relative to the carrier; and a top portion directly attached to the first component and the contact component and configured to be pressed by a user during coupling of the electronics unit to the base unit, wherein the coupling tool is in a locked configuration when the carrier retention device is configured to retain the electronics unit, wherein the coupling tool is in an unlocked configuration when the carrier retention device is configured to release the electronics unit from the carrier retention device.

2. The system of claim 1, wherein the carrier retention device comprises one or more hooks configured to retain the electronics unit when the coupling tool is in the locked configuration.

3. The system of claim 1, wherein the receiving feature comprises a receiving feature first end and a receiving feature second end, and the electronics unit is configured to be in proximity to the receiving feature first end when the coupling tool is in the locked configuration.

4. The system of claim 1, wherein the carrier retention device comprises a first arm and a second arm configured to retain the electronics unit in response to the coupling tool being in the locked configuration and configured to be contacted by the contact component in response to the coupling tool being in the unlocked configuration.

5. The system of claim 4, wherein the first arm and the second arm are flexible such that the first arm and the second arm flex to release the electronics unit in response to the coupling tool being in the unlocked configuration.

6. The system of claim 1, further comprising: an insert configured to attach the base unit to the user, wherein the coupling tool is configured to be received within the insert.

7. The system of claim 6, wherein the insert comprises a base unit support configured to support the base unit within the insert.

8. The system of claim 1, wherein, the first component extends a first length from the top portion and the contact component extends a second length from the top portion, wherein the first length is greater than the second length such that the carrier transitions to the unlocked configuration before the electronics unit contacts the first component.

9. The system of claim 1, wherein, the receiving feature comprises a hole extending through the carrier and usable to receive at least a portion of the first component.

10. A method of coupling an electronics unit of a wearable device of a continuous analyte monitoring system to a base unit, comprising: retaining the electronics unit to a carrier of a coupling tool using a carrier retention device; positioning the electronics unit in proximity to the base unit; engaging the carrier retention device with an activator of the coupling tool, the activator comprising a first component, a contact component, and a top portion, the first component configured to contact the electronics unit, the contact component configured to contact at least a portion of the carrier retention device, and the top portion directly attached to the first component and the contact component, wherein the engaging the carrier retention device with the activator comprises contacting the at least a portion of the carrier retention device with the contact component, thereby releasing the electronics unit from the carrier retention device; and coupling the electronics unit to the base unit by contacting the electronics unit with the first component, wherein the top portion is configured to be pressed by a user during the coupling of the electronics unit to the base unit.

11. The method of claim 10, wherein the carrier retention device comprises a first arm and a second arm configured to retain the electronics unit, and the engaging the carrier retention device with the activator comprises contacting at least one of the first arm or the second arm with the activator to release the electronics unit from the carrier retention device.

12. The method of claim 11, wherein the contacting at least one of the first arm or the second arm with the activator comprises contacting at least one of the first arm or the second arm with the contact component to release the electronics unit from the carrier retention device.

13. The method of claim 12, wherein the first arm and the second arm are flexible, and the contacting at least one of the first arm or the second arm with the contact component comprises flexing at least one of the first arm or the second arm using the contact component, wherein the flexing releases the electronics unit from the carrier retention device.

14. The method of claim 10, wherein, the carrier comprises a receiving feature that is usable to receive at least a portion of the first component, wherein the retaining the electronics unit to the carrier comprises retaining the electronics unit in proximity to the receiving feature.

15. The method of claim 10, further comprising: positioning the base unit in an insert configured to attach the base unit to the user; and receiving at least a portion of the carrier in the insert. The releasing the electronics unit from the carrier retention device occurs prior to the electronics unit being coupled to the base unit.

16. The method of claim 10, wherein, 17. A coupling tool, comprising: a carrier comprising a receiving feature; a carrier retention device attached to the carrier, the carrier retention device comprising a first arm and a second arm configured to retain an electronics unit in proximity to the receiving feature; and an activator comprising: ​ a first component at least partially receivable in the receiving feature and configured to contact the electronics unit in response to the coupling tool being in an unlocked configuration to couple the electronics unit to a base unit of a continuous analyte monitoring wearable device; a contact component configured to contact at least a portion of the carrier holding device in response to the coupling tool being in the unlocked configuration to release the electronics unit from the carrier holding device; and a top portion directly attached to the first component and the contact component and configured to be pressed by a user during coupling of the electronics unit to the base unit.

18. The coupling tool of claim 17, wherein, the first arm and the second arm are flexible and configured to flex after interacting with the contact component such that the electronics unit is released from the carrier holding device.

19. The coupling tool of claim 17, wherein, the first component extends a first length from the top portion and the contact component extends a second length from the top portion, wherein the first length and the second length are such that the carrier transitions to the unlocked configuration before the electronics unit contacts the first component.

20. The coupling tool of claim 17, wherein the carrier further comprises a first side and a second side, wherein the receiving feature comprises an aperture extending between the first side and the second side, wherein the electronics unit is configured to be positioned adjacent to the first side when the coupling tool is in a locked configuration.

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