Do I need to apply for a patent to replace the lock cylinder of the anti theft door?

The size of the lock cylinder of the anti-theft door, if you have a strong hands-on ability, you can remove it and measure it, based on the distance between the middle screw hole and the two keyholes, of course, if you are troublesome, you can simply measure it, as shown in the figure below, you only need to measure L1 + L2. >>>More

The lock cylinder is easy to replace, first remove the old one, and buy a new one according to the old one. Then replace it and you're good to go. >>>More

It depends on what kind of lock you get, some are of good quality and some are of average quality. Under normal circumstances, not the whole lock is changed together, and the lock cylinder is changed more, the general forty or fifty can be, and the better ones are seventy or eighty. Generally, when you go to find a lock to change the lock cylinder, it is installed in a package. >>>More

As of January 2020, if you can replace it yourself, the price of buying a lock cylinder is actually not expensive, but if you want to ask Master to install it, the price will be higher. >>>More

There are general-purpose and special-purpose types, mainly depending on the brand of the anti-theft door, like Wang Li's anti-theft door, using the self-produced Wang Li lock cylinder, like the anti-theft door of Xingyue God, using the lock cylinder of Baodean Pin, which depends on the specific brand to determine!