circular saw

Hello to all
Where can I find the lifting and tilting mechanism of the circular saw blade?
bye thank you

You want to build or replace? Tilt functions are part of most circular saw bodies. Lift is built into the front of the body, with a slotted curved segment holding the position at the rear. For many saws, replacement parts can be ordered, with varied amounts of economy.

Hello and thanks.
I do not have to replace because I want to build the saw bench with do-it-yourself.
possibly I would like to buy it already done but if I do not exist I build it, an idea of how to do it is already in my mind.

Building what we call a table saw with tilt and elevation would be fairly serious engineering, not impossible. You could Google a parts diagram to establish the reverse-design process. Otherwise, there are many blank tables made that accept a hand held circular saw readily. Far less intensive project you could do as we say 'at the kitchen table'. They are little but a table with enough clearance underneath to mount a functioning saw package by it's bed plate. Commercially, I'm sure they have a secondary switch or wire out that in handle so it runs independently of being gripped.
While self built tools are a great goal, sometimes you have to spend cash on 'the real thing' to get started. Unless you're after a 1950's Unisaw, Oliver, Moak, Crescent, Rockwell...a craftsman can build his own. Grand old iron cannot be duplicated without vast resources.
I don't know where you are, but we call it $$$.$$, others €€€.€€.