The phrase "inner mechanism" is correct and usable in written English.
It is used to refer to the internal workings or systems within something, often a machine or a person. Example: The scientist's research focused on understanding the inner mechanism of the human brain.
He holds the clock to his ear and listens to its inner mechanism at work.
Arriving at CornerHardware.com, the first thing I saw was a scale drawing of a deadbolt lock, which dissolved before my eyes to reveal the inner mechanism.
For the most part, these are not show-business veterans, hardened by some inner mechanism on how to please an audience, but new, young performers who are willing to try almost anything to communicate something of themselves.
Given the task of manning the lift, Karl realises sadly that he'll never fully understand its workings: the other lift-boy, despite six months in his post, "had never seen with his own eyes either the dynamo in the cellar or the inner mechanism of the lift, although, as he said himself, it would have delighted him".
"I do not think that fuller knowledge would sink me in your estimation, but my life would look like a featureless one indeed were I only to show you its outward aspect, with no thorough disclosure of the inner mechanism," he told her.
Of special interest, for instance, are skeleton pens — with metal lattices over translucent barrels, showing the inner mechanism — and also pens incorporating precious metals and gems.
Science has begun to clarify the inner mechanisms.
The outer impression is of chaos, the inner mechanisms detailed and stringent.
His fixation on the inner workings of the watch was translated into a fascination with the inner mechanisms of cameras.
So, I recommend Pulse as a good read, which will tell you what inner mechanisms make doctors tick.
The signs that something is amiss in our inner mechanisms of control and restraint are everywhere.
