Patent ID: 8215299

Claim:
A dose counter adapted to install on an end of a medication canister, does counter comprising a top cover, a circuit board, a positioning ring, an electrical cell, and a bottom cap, and characterized in that: the top cover has a top forming a transparent window, the top cover receiving and retaining therein the circuit board, the positioning ring, the electrical cell, and the bottom cap, an elastic device being arranged between the circuit board and the positioning ring, the circuit board forming a counting circuit that is constituted by a micro-controller unit, the counting circuit being in electrical connection with a display screen, an increment button, and a reset button; and the positioning ring has a top forming a projection, which opposes an underside of the increment button, the positioning ring forming an accommodation chamber, which receives and retains therein positive and negative terminals and the electrical cell, which are electrically connected to the circuit board through electrical conductors, the positioning ring being coupled to the top cover, the bottom cap being coupled to an underside of the positioning ring; wherein the dose counter is releasably installed on the end of the medication canister with the bottom cap and the medication canister is mounted to a mouthpiece by having an end tube fit into a pump inside the mouthpiece, whereby depression of the dose counter causes the number of times of depression of the dose counter to be displayed.