🔧The fan's buttons use springs and metal plates to control the fan speed.
⚙️The four-bar mechanism turns the fan's rotational motion into a back-and-forth oscillation.
🔌The wires connected to the buttons send signals to the motor, starting the fan.
🔄By pressing the pin, the fan starts oscillating, cooling a larger area.
⚙️The gear box and worm mechanism convert the fan's rotation into the crank's back-and-forth motion.
How do the buttons in a household fan work?
—The buttons have springs and metal plates that control the fan speed. When pressed, the plates slide to the left and click into place, preventing the buttons from coming back up.
What is the purpose of the pin on top of the fan?
—The pin, when pressed, initiates the oscillation of the fan, causing it to move back and forth and cool a larger area.
How does the fan convert rotational motion into oscillation?
—The fan uses a four-bar mechanism and a gear box with a worm mechanism to convert its rotational motion into the back-and-forth motion of the crank.
What happens when the pin is pulled up?
—When the pin is pulled up, the ball bearings attached to the pin are forced back in and out of contact with the worm gear, preventing the fan from oscillating.
How does the gear box help control the fan's speed?
—The gear box helps slow down the speed of the crank, ensuring that the oscillation happens at just the right speed.
00:00Introduction to the household fan and its mechanisms.
01:16Explanation of the buttons and their control over the fan speed.
02:32The pin on top of the fan initiates the oscillation of the fan.
03:38Introduction to the four-bar mechanism and its role in converting rotational motion to oscillation.
04:38The worm mechanism inside the gear box converts the fan's rotation to the back-and-forth motion of the crank.
05:57Explanation of the ball bearings and their role in the pin mechanism.
06:33The slower speed of the crank compared to the fan helps regulate the oscillation speed.
