Hi @sandy430 ,
Without an image it will be difficult to identify it and where it belongs, if indeed it does belong in the laptop.
Here’s a link to the [https://download.lenovo.com/consumer/mobiles_pub/flex_5-1470_5-1570_hmm_201703.pdf|hardware maintenance manual] for the laptop.
It doesn’t mention or show the spring in the parts section as a separate part so maybe you’re right and it doesn’t belong in there.