Knob switch having different gear positions and light guide

A rotary knob switch comprising:

• a knob head;
• a fixing mount disposed below the knob head and configured to allow at least a portion of a bottom of the knob head to pass through it;
• a cam located at a bottom of the fixing mount and configured to be mated with the bottom of the knob head, such that the cam is configured to be rotated under the control of the knob head, a side of the cam forming at least one protruding control curved surface;
• and
• a slider, the slider being coaxial with the cam, and a ramp with different heights being provided along an edge of the slider, wherein, when the cam rotates, the control curved surface of the cam presses the ramp of the slider, such that the slider slides along an axial direction towards a bottom of the rotary knob switch,
• wherein the knob head comprises an indicator block, a lower part of the indicator block is provided with an axial light guide column,
• wherein the indicator block further comprises a light guide reflection structure, the light guide reflection structure comprises:
• a light-emitting top surface corresponding to a top of the knob head, a light-incident bottom surface opposite to the light-emitting top surface, a light-emitting side surface corresponding to an outer side of the knob head, an inner side surface opposite to the light-emitting side surface, and left and right sides corresponding to left and right sides of the knob head, and
• wherein the inner side surface of the light guide reflection structure comprises a main reflection slope for a first reflection of light from the light guide column, the light guide reflective structure further comprises a hollow hole for a secondary reflection of a least a portion of the light reflected by the main reflection slope, such that a light incident into the light guide reflection structure through the light guide column is emitted from the light-emitting top surface and the light-emitting side surface.