Robotic lawnmower

A robotic lawnmower, comprising:

• a robotic body, wherein a mount hole is defined in a side face of the robotic body;
• and
• a trimmer mechanism, comprising a mount, a trimmer head, a drive motor, and a control assembly, the mount comprising a stand and a connection portion, wherein the connection portion is fixedly connected to the stand and configured to be inserted into the mount hole, the trimmer head is rotatably arranged on a bottom face of the stand, the drive motor is arranged on the stand, the drive motor is connected to the trimmer head and configured to drive the trimmer head to rotate, and the control assembly is communicably connected to the drive motor;
• wherein the trimmer head comprises a housing, a spool, an elastic member, and a trimmer line;
• wherein the housing is arranged at a bottom portion of the stand, an accommodation chamber and a through hole are arranged in the housing, and a ratchet bump is arranged at a bottom portion of the housing, wherein the through hole is in communication with the accommodation chamber, a ratchet groove is arranged in the spool, the spool is arranged in the accommodation chamber, the elastic member is situated between the spool and a top portion of the housing, the elastic member is configured to drive the spool to be abutted against the bottom portion of the housing such that the ratchet bump is inserted into the ratchet groove and is meshed with the ratchet groove in a rotation direction of the drive motor for synchronous rotation of the spool and the housing, one end of the trimmer line extends out from the through hole, the drive motor is arranged on the stand, an output shaft of the drive motor extends into the housing and is connected to the spool, the drive motor is configured to drive the spool to rotate and drive the housing to synchronously rotate to drive the trimmer line to rotate and unreel the trimmer line, and the drive motor is communicably connected to the control assembly.