Sun umbrella for e.g. market stall, opened and closed using sliding tube connected to spring via cables

摘要

The axially sliding tube (3) which is moved up or down in order to unfold or fold away the umbrella is connected to a spring (5) via one or more cables (9). The spring is housed inside the umbrella pole (2) and has one end secured to the pole and the other end secured to cables extending around one or more guide wheels (21).