Adjustable divider

An adjustable divider, comprising:

• a first divider member, a second divider member, a third divider member, and a stop mechanism, wherein the second divider member is located between the first divider member and the third divider member;
• the first divider member is movably connected to the second divider member;
• the second divider member is movably connected to the third divider member;
• the stop mechanism is mounted in the second divider member;
• a positioning rack is arranged in the second divider member;
• and an elastic member is arranged between the second divider member and the third divider member;
• and
• the stop mechanism comprises a stop member and a moving member;
• the stop member is engaged with the positioning rack;
• the moving member is movably connected to the first divider member, and abuts against the stop member;
• the moving member is configured to control engagement and separation of the stop member and the positioning rack;
• and when the stop member is engaged with the positioning rack, the moving member is further configured to control the stop member to move, such that the second divider member is only capable of moving in one direction;
• wherein the third divider member comprises an extension portion, and the second divider member comprises a first groove;
• the elastic member is a spring, one end of the spring is fixed in the first groove, and an other end of the spring abuts against the extension portion;
• wherein a coupling portion is formed on an inner wall of the first groove, a second groove is formed in the extension portion, and the coupling portion is located in the second groove to prevent the extension portion of the third divider member from being separated from the first groove.