Vehicle tire blowouts and air leaks are minor faults, but without a jack, no one can easily change the tire. If a female driver wants to change the tire, in addition to using a jack, she also needs to pay extra attention to the weight of the jack. After all, it is difficult for female drivers to move too heavy a jack, nor can they easily press the handle of a jack that is too heavy to lift a vehicle weighing several tons. Therefore, from the perspective of self weight and performance, the scissor jack is very user-friendly and rational, and from the perspective of components, it also conforms to the principles of ergonomics.

The components of the scissor jack embody the principles of ergonomics, in simple terms, its design conforms to people's usage habits and requirements. From the perspective of components, the following components embody the principles of ergonomics.

The screw style of the scissor jack is trapezoidal thread, which has the advantages of good processability and high root strength compared to other threads; The nut and screw are mutually driven to lift the support arm and achieve the purpose of lifting objects; The load-bearing platform is designed with a concave convex shape, which is convenient for storage and easy for users to find the jack support point under the car in the first time; The base bears the heavy burden of supporting the jack and heavy objects, with high requirements in terms of size, quality, and material. It is necessary to make the base lightweight while maintaining stability.