What is the purpose of the handbrake?

[VanDonovan]

When the handbrake is engaged for braking, the spring is stretched; when the handbrake is released, the spring returns to its original length. With prolonged use of the handbrake, the spring may also undergo corresponding deformation. For small cars, some handbrakes are located behind the transmission, connected to the driveshaft, where there is a brake disc, similar to a disc brake (though drum brakes also exist). The pulling force is transmitted there via a cable to achieve parking braking. More related information is as follows: 1. Introduction: The electronic handbrake has only one switch that controls the handbrake motor on the rear wheels. It uses the rotational force of the motor to engage and release the handbrake, eliminating the need for human effort. 2. Usage: The electronic handbrake is simpler to use; it can only determine whether to engage the handbrake but not the tightness. Once engaged, it provides maximum braking force.