Door knocker with audio playback

摘要

A novelty door knocker having an electronic sound effect or effects, the door knocker with mechanical arm, plate, switch or proximity sensor enabled to trigger a sound effect, and a battery-powered circuit for controlling and coordinating the acoustics with the trigger. The door knocker may be decorated with or shaped as a cartoon figure for use on a child's bedroom door, for example.

主权项

1. A door knocker apparatus, which comprises:
(a) a body member enabled to be mounted on a door, said body member having a circuit board enclosed therein, said circuit board with processor, battery, clock, speaker driver, volatile and non-volatile memory, wherein said body member is attachable to a generally planar outside surface of a door; (b) an acoustic speaker having an attachment to said body member and having an electronic connection to said speaker driver; (c) a swingplate or swingarm having a first aspect with hinged mechanical connection to said body member and a second aspect having a permanent magnet disposed so as to electromagnetically actuate said processor by a repetitive knocking action defined by a movement of said swingplate or swingarm from a magnetically contacted to a non-contacted position relative to a Hall Effect sensor mounted on said body member, said Hall Effect sensor having an electronic connection for delivering an electrical signal to said processor; and, further wherein said processor is programmed to actuate and modulate an output from said speaker driver so as to play a sound effect on said acoustic speaker when activated by said knocking action.