Working lamp and working lamp group

A working lamp group, comprising a working main lamp and at least one working expansion lamp for expanding the working main lamp, wherein the working main lamp comprises a main lamp housing, a main lamp lighting assembly arranged inside the main lamp housing, and a main lamp power supply system used for supplying energy for the main lamp lighting assembly;

• and
• the working main lamp is formed into the at least one working expansion lamp;
• and
• wherein a working lamp connecting portion is provided on an outer wall of the working main lamp housing, and the working main lamp housing is detachably connected to the working expansion lamp by means of the working lamp connecting portion;
• wherein the working lamp connecting portion comprises a first connecting portion connected to the working main lamp housing and a second connecting portion for connection with the expansion lamps;
• the first connecting portion is detachably connected to the second connecting portion;
• and
• the first connecting portion is rotatably connected to the second connecting portion;
• the first connecting portion comprises a connecting block connected to the working main lamp housing, and a connecting rotation shaft arranged on the connecting block;
• the second connecting portion comprises a connecting cylinder having a rotation shaft hole;
• the connecting rotation shaft is matched with the rotation shaft hole to penetrate into the rotation shaft hole;
• the connecting cylinder comprises a first connecting cylinder having a first rotation shaft hole and a second connecting cylinder having a second rotation shaft hole;
• the first connecting cylinder and the second connecting cylinder are spaced apart to form a limiting gap, and the first rotation shaft hole and the second rotation shaft hole are reserved in a coaxial manner to form the rotation shaft hole;
• an entry opening is reserved on a side wall of the first connecting cylinder;
• the entry opening runs through the height of the first connecting cylinder in the height direction, and communicates with a connecting hole of the first rotation shaft hole in the depth direction;
• the two opposite sides of the entry opening can be close to and away from each other to adjust the opening size, and the opening size of the entry opening is smaller than the diameter of the connecting rotation shaft under normal conditions;
• and
• a limiting block is arranged on a side wall of the connecting rotation shaft, the thickness of the limiting block matches the limiting gap, and the widths of at least some parts of the limiting block are greater than the opening size of the entry opening under normal conditions.