Shell - find files whose name does not contain a pattern

/home/scnzzh/zzh $> find ./ -name "my_*.xml"
./my_a.xml
./my_b_sked.xml
./my_c_sked_schedule.xml


/home/scnzzh/zzh $> find . -name "my_*.xml" ! -name "*_sked*"
./my_a.xml