Cutter head assembly with guide structure and wrench adjustment mechanism of electric hair cutter

A wrench adjustment mechanism of an electric hair cutter, comprising:

• a cutter head assembly (1), and
• a wrench assembly (2),
• wherein the cutter head assembly (1) further comprising:
• a bottom plate (11), a fixed cutter holder (12), a fixed blade (13), a movable cutter holder (14), a movable blade (15) and a torsion spring (16), wherein the fixed cutter holder (12) is slidably arranged on the bottom plate (11), wherein the wrench assembly (2) further comprising:
• a wrench portion (21) and a spring (22), wherein the wrench portion (21) is rotatably connected to the bottom plate (11) through a pin shaft (23), wherein a driving column (24) is arranged at an eccentric position at an inner end of the wrench portion (21), wherein the fixed cutter holder (12) is provided with a second slot (121) for interacting with the driving column (24) in an inserting manner, wherein a fixed tooth block (25) rotating synchronously with the wrench portion (21) is arranged in the wrench portion (21), wherein the wrench portion (21) or the pin shaft (23) is provided with a bevel tooth portion (232) engaged with the tooth surface of the fixed tooth block (25), wherein the spring (22) is disposed between the inner end surface of the wrench portion (21) and the fixed tooth block (25).