US Patent 7562851 Spring arm and body support

A spring arm (1) for a camera body support is provided with a parallelogram guide (3, 5) which is made up of two opposing legs (10, 11) disposed parallel to one another and two likewise opposing connecting elements (12, 13) that connect the respective ends of the legs (10, 11) with one another, and an energy storage mechanism (15), which is supported on two pivot points (17, 19) on the parallelogram guide (3, 5), in order to compensate a load acting on the parallelogram guide (3, 5). At least one (19) of these pivot points (17, 19) is adjustable in relation to the parallelogram guide (3, 5) such that both the energy storage mechanism's (15) pretension and also its action of force direction change.