Wireless battery for physiological monitoring system
A wireless recharging battery can be removably and replaceably coupled to a physiological monitoring device in a manner that securely retains the wireless recharging battery in a precise location relative to a corresponding wireless power interface of the monitoring device, while facilitating intuitive and easy removal and replacement of the wireless recharging battery by a user.
1 . A device comprising:
a monitoring device comprising a first housing, wherein the first housing includes a first waterproof enclosure for a first battery and sensing circuitry powered by the first battery, the first housing including a pair of functional guide surfaces on opposing sides thereof, each of the functional guide surfaces forming a curved draw path, and each of the functional guide surfaces including a curved detent; and
a recharging battery comprising a second housing, wherein the second housing includes a second waterproof enclosure for a second battery and wireless power transfer circuitry, the recharging battery including a pair of wings each having a curved flange shaped to guide the recharging battery along the curved draw path by following a respective one of the functional guide surfaces, each of the curved flanges further shaped to mate with a corresponding one of the curved detents of the monitoring device to secure the recharging battery in a predetermined position relative to the monitoring device for wirelessly transferring power from the second battery to the first battery through the wireless power transfer circuitry.
2 . The device of claim 1 , wherein the functional guide surfaces create a maximum insertion force for coupling the recharging battery to the monitoring device along the curved draw path of about 8 Newtons.
3 . The device of claim 1 , wherein the functional guide surfaces create a maximum insertion force for coupling the recharging battery to the monitoring device along the curved draw path of about 5 Newtons to about 15 Newtons.
4 . The device of claim 1 , wherein the functional guide surfaces create a maximum removal force for uncoupling the recharging battery from the monitoring device along the curved draw path of about 18 Newtons.
5 . The device of claim 1 , wherein the functional guide surfaces create a maximum removal force for uncoupling the recharging battery from the monitoring device along the curved draw path of about 10 Newtons to about 35 Newtons.
6 . The device of claim 1 , wherein each of the functional guide surfaces includes a ramp progressively displacing a corresponding one of the wings to receive the recharging battery along the curved draw path.
7 . The device of claim 6 , wherein the ramp of each of the functional guide surfaces displaces one of the wings of the recharging battery about 0.5 millimeters in a direction away from the monitoring device.
8 . The device of claim 6 , wherein each of the functional guide surfaces includes a second ramp progressively displacing the corresponding one of the wings to release the recharging battery from the curved detent when removing the recharging battery along the curved draw path.
9 . The device of claim 6 , wherein each of the functional guide surfaces includes a hard stop preventing movement of the recharging battery beyond the curved detents that receive the curved flanges when attaching the recharging battery to the monitoring device along the curved draw path.
10 . The device of claim 1 , wherein each of the curved flanges of the wings yield apart from one another about 0.5 millimeters in response to an outward force of about 20 Newtons.
11 . The device of claim 1 , wherein each of the curved flanges require at least 100 Newtons of outward force to separate from the functional guide surfaces of the monitoring device in a direction off the curved draw path.
12 . The device of claim 1 , wherein the second waterproof enclosure prevents ingress of water in harmful quantities during immersion in water to at least one meter for at least thirty minutes.
13 . The device of claim 1 , wherein the first waterproof enclosure prevents ingress of water in harmful quantities during immersion in water to at least one meter for at least thirty minutes.
14 . The device of claim 1 , wherein the curved draw path has a radius of curvature of about 227 millimeters.
15 . The device of claim 1 , wherein the curved draw path has a radius of curvature of between about 200 millimeters and about 260 millimeters.
16 . The device of claim 1 , wherein the second housing is formed of a polycarbonate blend.
17 . The device of claim 1 , wherein the pair of wings are symmetrical about an axis normal to the curved draw path to facilitate bidirectional coupling of the recharging battery to the monitoring device.
18 . The device of claim 1 , wherein the recharging battery is configured for bidirectional mechanical and electromagnetic coupling to the monitoring device.
19 . The device of claim 1 , wherein the first housing includes a sealant for waterproofing.
20 . The device of claim 1 , wherein the recharging battery powers the monitoring device.