- Autoliv transfers proven seatbelt technology to motorcycle helmets
- Inertia reel retractor is designed to automatically adjust the chin strap
- Additional neck strap based on the three-point belt principle
Autoliv, the world’s largest supplier of passive vehicle safety systems, has filed a patent for a novel chin strap system for motorcycle helmets. The technology is based on the retractor mechanism from automotive seatbelts and is designed to automatically adjust the helmet strap and lock it in place upon impact.
Seatbelt Technology for the Motorcycle Helmet
Autoliv, a Swedish-American corporation with over 70 years of experience in developing seatbelts and airbags for the automotive industry, has filed a patent that transfers the functionality of a classic three-point seatbelt system to the motorcycle helmet. The core of the system is an inertia reel retractor mechanism, similar to what is installed in virtually every modern car.
The functional principle is basically identical to fastening a seatbelt in a car: The strap can be pulled out gently and adjusts to fit the wearer. Once the buckle clicks into place, the reel unit automatically retracts the strap until it sits snugly. According to the patent, the helmet does not need to be unfastened to put on or take off the helmet. The rider simply pulls on the chin and neck straps to widen the opening, puts on the helmet, and the retraction mechanism then automatically ensures the proper fit.
Locking on Impact Rather Than Tightening
A key safety aspect of the system concerns its behavior in the event of an accident. Modern seatbelts in cars tighten actively on the passenger during a collision to prevent ejection. Autoliv’s helmet strap patent takes a somewhat different approach: Upon an abrupt movement or impact, the mechanism should not tighten the strap further, but lock it in place. This means the strap is blocked and cannot loosen further, but no additional tightening occurs. This is intended to prevent the helmet from coming loose during a crash.
Three-Point Principle with Additional Neck Strap
Beyond the reel retractor alone, the patent provides for an additional strap that runs behind the neck. The concept is based on the three-point seatbelt system, which has replaced the simple lap belt in the automotive industry and significantly improved safety. The additional neck strap is intended to hold the helmet even more securely to the head when the system locks, as the forces are distributed across multiple points.
Warning System, Solar Panel, and Wind Generator
What initially sounds like an April Fool’s joke is, according to the patent documents, quite serious: The system should feature sensors in the buckle that detect whether the strap is properly closed. If not, warnings are triggered in the form of vibrations, acoustic signals, or even a display in the visor. Autoliv has apparently also considered the most obvious circumvention attempt—simply letting the battery run down. The patent therefore suggests an integrated solar panel or, alternatively, a wind-powered micro-generator for power supply.
Autoliv Systematically Expands Motorcycle Safety Engagement
It is no coincidence that an automotive supplier wants to rethink the motorcycle helmet. Autoliv has set itself the goal of saving 100,000 lives annually by 2030, and is systematically expanding its engagement beyond automobiles into the two-wheel sector. Previously, the company had presented airbag helmets in collaboration with Italian helmet manufacturer Airoh. In March 2026, Autoliv presented the airbag vest T-SABE together with Japanese equipment supplier RS Taichi at the Tokyo Motorcycle Show, which is considered the first completely Autoliv-developed wearable protection system for motorcycle riders. The new Yamaha Tricity 300 is also already equipped with an Autoliv airbag.
The helmet patent thus fits into a broader strategy. As the world market leader for seatbelts with a global market share of 45 percent in belt systems, Autoliv possesses enormous expertise in exactly the technology that is being transferred to the helmet here.
Open Questions and Limitations
Despite all the technical sophistication, some questions remain open. The most pressing concerns the installation space: It is unclear how the entire mechanism of a reel retractor can be integrated into the limited space of a motorcycle helmet without noticeably increasing the weight. Every additional gram on a helmet can affect wearing comfort and fatigue.
Furthermore, there is the question of basic necessity. Helmets coming loose during a crash is relatively rare and in most cases due to an incorrectly chosen helmet or operator error when fastening. Whether a mechanical system is necessary to properly close a strap that can also be manually fastened in seconds is a matter of opinion.
It is also important to put this in perspective: A patent does not mean that a product will actually come to market. But it does show that Autoliv is actively working on such concepts and at least thinking through the technical feasibility. Whether and when a helmet with a reel retractor will actually be available in stores remains completely open at this time.
➜ This article is part of our comprehensive overview: Motorcycle Patents and Future Technology: What Manufacturers Are Developing. Find all key information on this topic in one place.
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