Cooking appliance and knob assembly thereof

A knob assembly for a cooking appliance, the knob assembly defining a central axis, the knob assembly comprising:

• a control knob mountable to the cooking appliance about the central axis, the control knob comprising:
• an adjustable body comprising push body and a center projection defining a body opening;
• a static body disposed within the body opening;
• a support plate secured to the static body, the support plate defining a center hole coaxially aligned with the central axis;
• an external spring disposed between the support plate and the adjustable body, the adjustable body being in forward-biased mechanical communication with the external spring;
• and
• a preload spacer insertable between the external spring and the support plate,
• wherein the external spring defines a first discrete preload setting when the preload spacer is inserted between the external spring and the support plate, and
• wherein the external spring defines a second discrete preload setting when the preload spacer is removed from between the external spring and the support plate.

A knob assembly for a cooking appliance, the knob assembly comprising:

• a control knob mountable to the cooking appliance, the control knob comprising:
• an adjustable body comprising a push body, a center projection defining a body opening, and a center cylinder positioned radially inward of the push body;
• a static body disposed within the body opening;
• a support plate secured to the static body, the support plate comprising a cam projection extended from a front face of the support plate, the cam projection comprising a first cam surface at a distal end of the cam projection;
• an external spring disposed between the support plate and the adjustable body, the adjustable body being in forward-biased mechanical communication with the external spring;
• and
• a preload spacer disposed around the center cylinder and positioned between the external spring and the support plate, the preload spacer comprising a second cam surface engaged with the first cam surface.