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Security Component - Clock Spring
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  • Security Component - Clock Spring

Security Component - Clock Spring

The clock spring is a critical electrical rotary connector used in automotive airbags, installed beneath the car’s steering wheel. It serves as a highly reliable current-transmitting device connecting two components that rotate relative to each other. Primarily composed of a flexible flat cable, a housing designed for rotational movement, wire harnesses (conductive lead wires), and connectors, the clock spring ensures seamless electrical connections for essential components like the driver-side front airbag and horn switch during the left-to-right rotational motion of the steering wheel. In automotive airbag systems, the clock spring plays a vital role in transmitting electrical signals and completing circuits, enabling the proper functioning of the airbag's Electronic Control Unit (ECU) after a collision.
  • Product Description
  •   The clock spring is a critical electrical rotary connector used in automotive airbags. Installed beneath the car steering wheel, it serves as a highly reliable current-transmitting device connecting two components that rotate relative to each other. Primarily composed of a flexible flat cable, a housing designed for rotational movement, wiring harnesses (including conductive lead wires), and connectors, the clock spring ensures seamless electrical connections for essential components such as the driver-side front airbag and horn switch during the left-to-right rotational motions of the steering wheel.

      The clock spring plays a critical role in automotive airbags by facilitating the transmission of electrical signals and completing circuits, ensuring that, in the event of a collision, the airbag’s ECU can reliably, promptly, and effectively send signals to the inflator, triggering the deployment of the airbag and safeguarding the lives of the driver and passengers. If the individual circuits within the clock spring aren’t properly connected, the airbag may fail to deploy correctly during a crash, leaving occupants inadequately protected. This underscores the vital importance of the clock spring in the vehicle’s safety system.

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Electronic Automotive Safety Restraint System – ECU & Sensors

The central controller serves as the brain of the airbag system, receiving signals from collision sensors and other input devices to determine whether to ignite and deploy the airbag. It also performs self-diagnosis to detect any system malfunctions. The central controller is composed of components such as the ignition controller, driver circuit, storage circuit, and diagnostic circuit. At the heart of the ignition controller lies the ignition control algorithm, which precisely determines the timing of airbag deployment and ensures robust performance even in challenging conditions like rough road surfaces—this is the core technology behind airbag control. Given the diverse structural designs of real-world vehicles and the varying characteristics of collisions they experience, numerous variations of the ignition control algorithm have been developed to seamlessly adapt to different scenarios.

Electronic Automotive Safety Restraint System – Curtain Airbag

The curtain airbag (CAB) covers the upper portion of the vehicle’s inner side panels, providing critical head protection for all occupants seated near the side in the event of a side-impact collision or rollover accident. Positioned above the door frames along the roof rails, the CAB’s coverage area can vary depending on the vehicle’s specific structure—ranging from the A-pillar to the C-pillar or even extending from the A-pillar to the D-pillar. The gas generator can either be mounted in the center of the airbag (closer to the B-pillar) or placed toward the rear end (near the C- or D-pillar). Once triggered by an ignition signal, the curtain airbag inflates within 25 milliseconds, shielding occupants from direct contact with external hard objects and significantly reducing the risk of head injuries.

Electronic Automotive Safety Restraint System – Driver-Side Airbag

Side Air Bags (SABs) are installed on the sides of car seats or inside the doors, providing critical protection to occupants' chests and heads during side-impact collisions. There are generally two main types of side airbags: one is a head-and-chest integrated design, primarily protecting both the chest and head areas; the other is a chest-only airbag, which mainly safeguards the chest, abdomen, and pelvic regions. When used in conjunction with side curtain airbags, these systems deliver exceptional protection. Upon receiving an ignition signal, side airbags rapidly inflate—typically within about 20 milliseconds—to cushion occupants and significantly reduce injury risks during side-impact crashes.

Electronic Automotive Safety Restraint System – Driver-Side Airbag

◆Cover: One-piece / Pull-strap hinge type, made from thermoplastic elastomer TPEE via injection molding ◆Gas Generator: Hybrid gas type / Pyrotechnic type ◆Airbag: 90–120 liters, constructed from nylon 66 ◆Weight: Approximately 2000 grams

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Address: No. 16, 4th Section of Bohai Street, Jinzhou Economic and Technological Development Zone, Liaoning

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