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US 11,231,180 B2Granted
Knob assembly for cook top
AssigneeLG Electronics Inc.
InventorYeonsik Ha
Life of this patent
Estimating the term…
Abstract
A knob assembly includes a front panel, a knob located at a front panel of an appliance and configured to rotate based on operation by a user, a valve shaft that is coupled to the knob and that extends through the front panel, a valve connected to the valve shaft and configured to control supply of gas to the appliance, and a knob sensor configured to detect a rotational position of the valve shaft. The valve shaft is configured to control the valve to adjust a flow rate of gas based on rotation of the valve shaft.
Claims20
A knob assembly, comprising:
- a valve shaft connected to a valve of an appliance;
- a knob disposed outside of a front panel of the appliance and connected to the valve shaft;
- and
- a knob sensor configured to detect a rotational position of the valve shaft, the knob sensor comprising:
- a sensor plate mounted to the valve,
- a sensor board comprising a plurality of Hall sensors arranged around the valve shaft, the valve shaft being configured to (i) move relative to the sensor board along a longitudinal direction of the valve shaft and (ii) rotate relative to the sensor board,
- a rotating plate that is spaced apart from the sensor board and that is fixed to the valve shaft so as to rotate with the valve shaft and to move in a longitudinal direction together with the valve shaft,
- a knob sensor magnet disposed at the rotating plate, and
- a sensor spring configured to apply elastic force to the sensor board toward the rotating plate.
6 more elements
An appliance comprising:
- a case comprising a front panel;
- a valve disposed inside of the case and configured to control a flow rate of gas;
- and
- a knob assembly comprising:
- a valve shaft connected to the valve,
- a knob disposed outside of the front panel and connected to the valve shaft, and
- a knob sensor configured to detect a rotational position of the valve shaft,
- wherein the knob sensor comprises:
- a sensor plate mounted to the valve,
- a sensor board comprising a plurality of Hall sensors arranged around the valve shaft, the valve shaft being configured to (i) move relative to the sensor board along a longitudinal direction of the valve shaft and (ii) rotate relative to the sensor board,
- a rotating plate that is spaced apart from the sensor board and that is fixed to the valve shaft so as to rotate with the valve shaft and to move in a longitudinal direction together with the valve shaft,
- a knob sensor magnet disposed at the rotating plate, and
- a sensor spring configured to apply elastic force to the sensor board toward the rotating plate.
10 more elements
Dependencies are inferred from the claim text.