Clock spring

Also known as rotary connector, airbag hairspring and spiral cable, it is used to connect the main airbag with the airbag harness, or the switch button and control unit of the steering wheel, which is actually a section of harness. Because the main airbag rotates with the steering wheel (it can be imagined as a wire harness with a certain length, which is wound on the steering shaft of the steering wheel, and can be loosened or reversely wound more tightly when rotating with the steering wheel, but it is also limited, so it is necessary to ensure that the wire harness cannot be pulled off when the steering wheel is turned left or right), so there should be a margin for connecting the wire harness, and it is necessary to ensure that the steering wheel rotates to the limit position without being pulled off. This is especially important during installation, and it must be kept in the middle position. Minimum number of turns, internal resistance of clock spring, rotating noise, maximum current and rotating torque.

Many car manufacturers are desperate for the number of turnable laps. There is a misunderstanding here. The number of turns that the clock spring can turn is not as many as possible. Depending on the number of turns the steering wheel can turn, a margin of about 0.5 turns is usually enough. The more turns the clock spring can turn, the greater the manufacturing cost, the more layers of internal winding, and the greater the probability of failure. There are not many domestic manufacturers specializing in the production of clock springs, mainly including Jiaxing Huachang Denso, Shanghai Yingzhi Automotive Electronics, Shanxi Rongchang, Tianjin Jinhe and other manufacturers. Among them, the clock spring manufacturer represented by Jiaxing Huachang is the most professional, with the most advanced equipment and large scale in the domestic clock spring industry, and Shanghai Yingzhi is also a more professional manufacturer.

Generally speaking, there is still a big gap between the domestic clock spring industry and overseas developed countries, mainly reflected in the reserve of equipment and professional and technical personnel.