Use `find' "-printf" predicate inside bash script

[JB]

This `find' command works on the command line:

        find /tmp/ -type f -mtime -1 -delete -printf "deleted file: %f\n"

But it doesn't work inside this script:

        #!/bin/bash
        args_find='-type f -mtime -1 -delete -printf "deleted file: %f\n"'
        find /tmp/ $args_find

It only works when written like this:

        #!/bin/bash
        args_find="-type f -mtime -1 -delete -printf"
        args_print="deleted file: %f\n"
        find /tmp/ $args_find "$args_print"

I've tried using arrays with both "@" and "*", but same result.
I tried escaping the double-quotes, but `find' complains:
        warning: unrecognized escape `\"'
        paths must precede expression: `file'

What's the proper way to do this inside a variable which doesn't trip up 
"-printf"?

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