Sound effect device for radio controllable toy vehicle

Claim 1

In a sound effect device built in a radio controllable toy vehicle which includes a receptive circuit (12) for receiving a radio control signal, a decoder circuit (14) for decoding the received signal, a power-motor drive circuit (16) and a steering drive circuit (18) which respectively actuate a motor unit (20) and a steering unit (22) depending upon a signal delivered from said decoder circuit (14), said receptive circuit (12) being electrically connected through said decoder circuit (14) to said power-motor drive circuit (16) and said steering drive circuit (18), the improvement comprising: an engine sound on/off switch (30), a starting switch (32) for energizing a starting motor, an amplifier (26), a speaker (28) electrically connected to said amplifier (26), and a microcomputer (24); said engine sound on/off switch (30), said starting switch (32) and said amplifier (26) being electrically connected to said microcomputer (24); said microcomputer (24) performing a processing for generating, in said speaker (28), various realistic sounds including engine sounds depending upon a driving condition of the toy vehicle on the basis of signals delivered from said decoder circuit (14) and a position of each of said switches (30, 32).