| 主权项 |
1. In a bone-conduction speaker, the combination comprising:
a housing having a set of upper notch extremities and a set of lower notch extremities within inside side walls of the housing, and also having upper and lower covers; first and second pairs of notched extremities in said upper cover, extending between said set of upper notch extremities of said inside side walls of said housing; a printed circuit board extending between said first pair of notched extremities of said upper cover; a steel ring underlying said upper cover of said housing; a voice coil disposed between said steel ring and said upper cover of said housing; a magnetic ring encircling said voice coil; a steel plate within said magnetic ring; a yoke having a centered magnet within steel plate; a resilient voice screen of three leaf spring prong portions, each extending along a spiral curve between central and peripheral portions thereof, with each being formed by inner and outer curves substantially parallel to a curve of said peripheral portions, with each of said leaf spring prong portions terminating in substantially a point; a lower cover underlying said voice screen having opposing ends fitted into said pair of lower notch extremities of said inside side walls of said housing to be mechanically captured therein; and with said points of each leaf string portion bearing against one of an underside Of said yoke and a top side of said lower cover fitted into said pair of lower notch extremities. |
