COUNTER STRUCTURE OF DRY POWDER AEROSOL DELIVERY SYSTEM

A counter structure of a dry powder aerosol delivery system, comprising a housing (1). A knob (2) is provided on one end of the housing (1); a counting disc (3), a transmission gear (4), a counting disc cover (5), a spring (6), a vibration gear (7), and a rotating disc (8) are provided in the housing (1); the housing (1), the knob (2), the counting disc (3), the counting disc cover (5), the spring (6), the vibration gear (7), and the rotating disc (8) are coaxially disposed; the counting disc (3), the counting disc cover (5), the spring (6), and the vibration gear (7) are sleeved on a straight rod (8-3) of the rotating disc (8); an outer gear (8-4) meshed with the transmission gear (4) is provided on the periphery of the straight rod (8-3); a counter window (2-1) is formed on the front surface of the knob (2), such that a patient can read conveniently and master the used inhalation times or the remaining usable inhalation times; and a counter function is provided on the knob (2), and the residual dose is coun