| 摘要 |
An arrangement is disclosed for converting user actions performed during normal use of a device into electrical energy in a controlled and consistent manner, using an energy harnessing mechanism. The device may be a medical device e.g. dosing, injecting or diagnostic devices or a door or hinged lid and the action may include removing a cap or lid, dispensing from a container or setting a parameter. In an injection pen, the linear removal/replacement of the cover causes the cam track 103 formed in the cover to reciprocate the actuator 135 via the follower projection 133a, the actuator operating lever 139 of the generator 137. Slots 155a constrain actuator movement perpendicularly to the movement of the cap. The cam tract profile controls the number of oscillations of the actuator, each oscillation generating a predetermined and consistent quantity of energy which may be used for storage or communication of information, display or sensing functions. In an alternative embodiment the cam track 703 is formed on the interior of a container screw closure 701, the follower 733 extending though a slot 755 on the container body 721 (fig7b not shown). |
