Button

A button, comprising:

• a lower button shell, having a hollow structure with an upper opening, provided with a first sliding pin hole through a side wall of the lower button shell;
• an upper button shell, having a hollow structure with a lower opening, wherein a side wall of the upper button shell is provided with a second sliding pin hole, the upper button shell is sleeved on the lower button shell, and the second sliding pin hole is directly opposite to the first sliding pin hole;
• a moveable tray, located at a central position in the lower button shell;
• a sliding arm, having a first end rotatably connected to the moveable tray;
• a sliding pin, located in the lower button shell, Wherein one end of the sliding pin is rotatably connected with a second end of the sliding arm which is apart from the moveable tray, wherein the second end of the sliding pin extends through the first sliding pin hole into the second sliding pin hole to prevent a up-and-down movement of the upper button shell relative to the lower button shell from being separated from the lower button shell;
• wherein, the moveable tray is configured to use the sliding arm to drive the sliding pin to move horizontally into the lower button shell and separate the sliding pin from the second sliding pin hole upon being moved upward or downward relative to the lower button shell.