Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: A gas control knob includes a main body having a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate the gas flow rate between the gas inlet hole and the gas outlet hole of the main body, a rotation lever rotatably mounted on the main body to rotate the throttling cock, and a motor mounted on a fixing bracket to drive a transmission mechanism automatically which drives a clutch mechanism to drive and rotate the rotation lever to rotate the throttling cock. Thus, the gas control knob is operated manually or automatically, thereby facilitating a user operating the gas control knob.

Abstract: A gas control knob includes a valve body, a valve cap, a rotation lever, a cam, and a spring. Thus, when the rotation lever is rotated to regulate the gas flow rate, the engaging tooth of the cam is axially and reciprocally movable on the toothed face of the track of the valve cap synchronously to produce vibration and sound during rotation of the rotation lever, thereby providing a notification function to the user so as to assure the safety when using the gas stove.

Abstract: A gas control knob includes a valve body, a valve seat mounted on the valve body, a control lever movably mounted in the valve seat and movable by a pressing action to regulate a gas flow rate of the valve body, a fixing bracket mounted on the valve body, a motor mounted on the fixing bracket, a transmission mechanism mounted on the fixing bracket and driven by the motor, and a linear displacement mechanism mounted on the fixing bracket and driven by the transmission mechanism to perform a linear motion to press the control lever to regulate the gas flow rate of the valve body automatically. Thus, the gas control knob is operated and controlled automatically, thereby facilitating a user operating the gas control knob.

Abstract: A gas control knob for a gas stove includes a main body having a gas chamber connected between a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate a gas flow rate between the gas inlet hole and the gas chamber, and an electromagnetic valve mounted on the main body to control connection between the gas chamber and the gas outlet hole of the main body. Thus, the electromagnetic valve is operated to open or close the fire automatically after the rotation lever is rotated to a determined extent, thereby facilitating a user opening or closing the fire of the gas stove.

Abstract: A gas control knob includes a main body having a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate the gas flow rate between the gas inlet hole and the gas outlet hole of the main body, a rotation lever rotatably mounted on the main body to rotate the throttling cock, and a motor mounted on a fixing bracket to drive a transmission mechanism automatically which drives a clutch mechanism to drive and rotate the rotation lever to rotate the throttling cock. Thus, the gas control knob is operated manually or automatically, thereby facilitating a user operating the gas control knob.