US Patent 9387747 Retractable door device of a utility vehicle

A retractable door device of a utility vehicle has a retractable door plate assembly and at least one retractable assembly. The retractable door plate assembly has multiple door plates of different sizes that are concatenated in descending order of size. The concatenated door plates are extendable and retractable. The retractable assembly has a retractor and a flexible elongated body. The retractor is mounted in the largest door plate. The flexible elongated body is mounted through the multiple door plates, and two ends of the flexible elongated body are respectively connected to the retractor and the smallest door plate. The flexible elongated body can be retracted to and extracted from the retractor.