My state's law prohibits the concealed carry of "weapons." My state also defines air guns, and black powder guns as firearms for purposes of the statute concerning prohibited persons for example, but the black-powder gun's status as a firearm or otherwise is immaterial to the statutes concerning the concealed carry of weapons because in all cases it most certainly meets the definition of a weapon. Pocket knives are not considered weapons prima facie. If they're used to open a box, they do not have weapon status. If the same knife is used to assault someone then it can readily be considered a weapon, even a deadly one.
Our state's Sheriffs are allowed under the statutes to issue CCW permits (it is a shall issue state too), but the permits are in practically every case for handguns. Concealing an edged weapon requires a permit and a Sheriff could issue a permit to conceal an edged weapon, but I've never heard of it happening. As for what qualifies a knife as a weapon vs. a tool or pocket knife that are legal to conceal it is debatable. So far in the debate (precedents), the distinction has mostly been made around intent. People have been busted, and convictions stuck for concealing a steak knife and a knife disguised as a pen, but mostly because they concealed them with the intent to shank someone with it. This wasn't just supposed but proved out by their motives and actions. Nevertheless, in this state, I would not conceal a large Bowie, a dirk or a long F+S dagger without a permit. The way the statutes are written, it would be too easy to lose.
When I go to California, the way the code is written pretty much any fixed blade cannot be concealed -- not even a paring knife. But if it has a hinge on it, you could probably claim a folder with a 12" blade is a pocket knife.
The 2nd Amendment is to prohibit the infringement on the right to keep and bear arms, not just guns. If the situation with infringements with respect to edged arms is bad, it's patently absurd when it comes to sticks. God help you in this country if you decide to literally walk softly and carry a big stick.