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Drag spring
Spring is a spiral spring under axial tension, the hook is in the form of side hook spring, spring long hook, hook hook spring tension spring British, German, semicircular hook spring, duck hook spring and so on, "hook" is used to ensure the tension spring force source, usually made of circular section material spring steel, in does not bear load, between the circle and circle spring are generally and tight with no gap, by stretching back stretch (tension), to control the mechanical movement, saving energy, the size of the measuring force, tensile spring most often in a certain degree of tension, even in the absence of any load case. The initial tension determines at no load conditions, the close degree of tensile spring coil.
Spring is widely used in medical respiratory equipment, motion control, medical device, hand tools, home care equipment, shock absorption, pump spring, mechanical and electronic protection hardware, fluid control valve, mechanical and aerospace components, actuator, switching equipment, instrument. , the materials are stainless steel, spring steel, high carbon steel, copper, oil tempered spring steel alloy etc..
