Is the reading 缶【かん】の縁【えん】 correct?
缶【かん】の縁【えん】でけがをしないように気【き】を付【つ】けてください
Be careful not to injure yourself on the rim of the can.
https://www.bosai-nippon.com/article/4242?paged=2
I also found
縁【ふち】
and
縁【へり】
I found a number of examples here, but not an exact fit for the example sentence of "the rim of a can":
No, for the meaning of 'edge', it can never be えん.
I think 缶の縁{ふち} is more common, but 縁{へり} is acceptable too.
This thesaurus entry says
３「縁」は、平面状のもの、あるいは立体の外周部分をいう。
４「へり」は、平面状のものの外周部分をいう。「縁」とも書く。
As listed there, 目の縁{ふち} is more common than 目の縁{へり}. And 机の縁{へり} is more common than 机の縁{ふち}. My impression is 縁{ふち} is more about a point along the edge while 縁{へり} is the edge itself. (Cf. 崖の縁{ふち}に立つ vs 畳の縁{へり}を歩いてはいけない.) But it is largely a matter of collocation.
