A PVT PLT FLYING A C177RG HAS THE NOSE GEAR COLLAPSE AFTER A SHORT ROLL ON THE RWY AT SQL; CA.

Narrative

I RECEIVED ATIS ABOUT 15 MI OUT. THEN ABOUT 10 MI OUT I CONTACTED THE TWR COMING FROM THE E; DIRECTLY INTO BASE (AS INSTRUCTED BY THE TWR). ABOUT 3 1/2 MI OUT; ON BASE; I LOWERED THE LNDG GEAR GETTING THE PLANE READY FOR LNDG. I PERFORMED GUMPS TWICE AND ALSO ASSURING THE GEAR WAS DOWN BY THE GREEN LIGHT (THIS PLANE HAS A SINGLE GEAR LIGHT FOR ALL GEAR DOWN) AND VISUALLY CHKING. PRIOR TO LNDG; I COMPLETED A FLARE ABOUT 5 DEGS NOSE HIGH AND COMPLETED A SOFT LNDG ON THE MAIN GEAR. ON SOFTLY LOWERING THE NOSE GEAR; THE NOSE GEAR TOUCHED DOWN AND ABOUT 2 SECONDS ON ROLLOUT THE NOSE CONTINUED TO LOWER. I IMMEDIATELY PULLED THE MIXTURE TO CUT THE ENG. THE PROP STRUCK SEVERAL TIMES. THE PLANE STOPPED AND I TURNED OFF THE IGNITION; TOOK OUT THE KEY AND EXITED THE PLANE. BOTH TWR PERSONNEL AND A FIRE TRUCK CAME TO THE PLANE. I WAS THE ONLY PERSON IN THE PLANE AND NO INJURIES OCCURRED. I AM CURRENTLY UNSURE OF THE EXACT CAUSE BUT I FEEL THAT THERE HAS BEEN SOME KIND OF MECHANICAL FAILURE WITH THE NOSE GEAR.