Why didn't Gu Jian fall out after being sheathed?

There are two kinds of scabbard self-tightening, one is on wooden scabbard and the other is on leather scabbard. Generally speaking, the former can be equipped with a bigger sword, and the latter usually only appears in the scabbard less than half a foot! For example, most mountain knives in Japan are made of self-tightening wood, while most machete weapons in Africa are made of leather self-tightening sheaths! The advantage of the former is that both scabbard and sword can be used as weapons, while the advantage of the latter is flexibility!

Soft button method is still very common today, which is essentially to fasten and tighten the sword. There are usually only two kinds of weapons, one is a dagger and the other is a wide weapon! Soft fastening method The so-called soft fastening means fastening. The main body of the scabbard can be a hard wooden scabbard, or even a wooden scabbard wrapped in metal! This is a kind of fixing method whose reliability is second only to that of tension spring fixing method, but because it is soft, opening (buckling) knife and drawing knife must be two actions, which is not as smooth as tension spring fixing method, so this fixing method will basically not appear in the fixing of main weapons!

Why didn't Gu Jian fall out after being sheathed? What do they use to fix it? The way I look at this problem is that the sheath is generally longer. After the sword is sheathed, it is on the upper part of the scabbard, that is, there is a rope tied around the waist at the entrance of the scabbard, so that the sword will not fall out. Of course, some expensive swords also have a mechanism at the hilt with a spring device inside. After the sword is drawn, the device is only stuck on a bayonet of the sheath, and others can't pull it out. People who use it only need to hold the handle, press it with their fingers, the clip will be pressed back, and the sword will naturally be pulled out smoothly. A few decades ago, I once saw a saber with this system installed on its handle. The design is ingenious. So, I have this statement.

There is a circlip (spring) between the sheath and throat of the ancient sword. If you don't press the circlip with your thumb, the blade will be locked in the scabbard and won't fall out. If you press the spring, the sword will come out easily. You always know it by listening to storytelling, and it is often mentioned in storytelling? I saw a sword in his hand, and when his left hand pressed the spring, he heard the sound of Cang Zi, and the sword was drawn? .