The principle of manual spring self-balancing welded boom
The most remarkable feature of this boom is that it can "balance its own weight". Their weight won't directly press on your hand but will be quietly counterbalanced by a "spring force pack"!
How was it achieved?
Your strength has decreased: When something hangs on your inner arm and becomes heavier, this weight will be transmitted to the spring through the joint. The spring was already compressed in advance (like a flattened rubber band), and now when it is pressed by weight, it will generate an upward elastic force. This elastic force and the gravity of the hanging object are exactly in opposition, canceling each other out. At this point, if you push or pull the inner arm, it's like pushing a seesaw that has already been balanced. You hardly need to exert much effort. Just a gentle touch can make it rise or fall or rotate, and your arm won't get sore!
What are the key parts?
Base support: A "big foot" welded with strong steel bars, standing firmly on the ground and supporting the entire boom.
Spring balance system
Spring: Like a spring that has been pre-compressed, when hanging something, it will be further compressed, generating an upward elastic force.
In simple terms, it means that the spring is pressed in advance. When hanging something, the spring is pressed even tighter, and the generated elastic force offsets the weight of the object. When you operate it, it's like pushing a lever that has already been balanced, which is effortless and easy
