Electric hair trimmer with illumination system

An electric hair trimmer with an illumination system, comprising:

• a handle;
• a detachable and replaceable blade head;
• and
• the illumination system;
• wherein the handle comprises a motor seat that is disposed on an output end of the handle, a motor is disposed in the motor seat, the detachable and replaceable blade head is detachably and quickly mountable on the motor seat of the handle, and the illumination system comprises portions that are separately disposed on the handle and the blade head;
• wherein the illumination system comprises a light source and a light guide body, wherein the light source is disposed in the motor seat, an output optical axis of the light source is substantially parallel to an output shaft of the motor, wherein the light guide body is disposed on the blade head, wherein when the blade head with the light guide body is mounted onto the handle, a light-receiving surface of the light guide body is disposed corresponding to the output optical axis of the light source, and a light-emitting surface of the light guide body faces a working area of the blade head;
• wherein there is defined an annular stepped groove on an inner side of an upper edge of a peripheral wall of the motor seat, and there is defined an annular stepped rim on an inner side of a lower edge of an outer wall of the blade, and wherein when the upper edge of the peripheral wall of the motor seat is docked with the lower edge of the outer wall of the blade head, the annular stepped rim is clamped in the annular stepped groove.