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The motor drives the coiler to rotate, and the car proportional regulator uses the steel wire rope to pull the glass bracket to move up and down in the guide rail. The advantages of the elevator are less parts, light weight, simple structure and adjustable installation position. The disadvantage is that the position of the wire rope guide plate must be adjusted during installation to make it parallel to the glass guide groove on the window. Otherwise, when the glass moves, it is easy to get stuck between the glass and the guide groove. It is mainly used in cars and seldom used in other cars.

The structural feature of the single arm type window regulator is that there is only one lifting arm, and the structure is the simplest. However, because the relative position between the supporting point of the lifting arm and the center of mass of the glass often changes, the glass will tilt and jam when lifting. This structure is only suitable for the case that the two sides of the glass are parallel and straight. In China, BJ 1040, NJ 130, CA 1090 and other models, the front doors of Toyota and Isuzu series light trucks in Japan adopt single arm window regulators.

The steel wire rope for the car proportional regulator is the door accessory to realize the door glass lifting movement in the door system, and it is a special part to adjust the opening of the door glass window. Its function is to ensure the door window glass to rise and fall steadily, and to open and close smoothly. When the external control of the lifter is cancelled, the glass shall be able to stop at any position, neither to slide down automatically, nor to jump up and down due to the bumps of the car. The window regulator drives the glass bracket to move up and down, so that the door glass moves up and down along the guide slot or guide rail of the door window frame.