Steel ring

A steel ring, comprising a ring body and a locking mechanism, wherein the ring body has an inner surface and an outer surface, the locking mechanism comprises a locking component, and the locking component is provided on the inner surface of the ring body;

• and the ring body has a first state and a second state, wherein when the ring body is in the first state, the ring body is in an unclosed annular shape, and when the ring body is in the second state, the ring body is in a closed annular shape;
• wherein the locking component is provided to protrude from the inner surface, the locking component comprises locking teeth, each of the locking teeth comprises a fixed part and a contact part, the fixed part is fixedly provided to the inner surface, and the contact part is provided to protrude from the inner surface and be inclined in a direction of a second axis;
• wherein the locking component comprises a first locking tooth group, the first locking tooth group comprises two or more locking teeth with different inclination directions, and in the first locking tooth group, a distance between the fixed part of each of the locking teeth and the fixed part of other of the locking teeth is smaller than the distance between corresponding contact parts;
• wherein the locking component comprises a second locking tooth group, the second locking tooth group comprises two or more locking teeth with different inclination directions, and in the second locking tooth group, a distance between the fixed part of each of the locking teeth and the fixed part of other of the locking teeth is greater than a distance between corresponding contact parts.