Spring arm device

Abstract

The invention provides a spring arm device which comprises a floating edge, a fixed edge, a parallelogram link mechanism, a spring, a pulling rod, a bearing shaft and a retainer, wherein the fixed edge is parallel with the floating edge; the parallelogram link mechanism is respectively arranged between the floating edge and the fixing edge and consists of an upper arm and a bearing arm; one end of the spring is connected to the fixing edge or the upper arm, and the other end is connected to the floating edge, the bearing arm or the hinge joint of the floating edge and the bearing arm; the pulling rod is used for installing the spring; the bearing shaft is used for fixing the pulling rod; the retainer is used for mounting the bearing shaft; and the retainer is installed on the floating edge, or the bearing arm or the hinge joint of the floating edge and the bearing arm. According to the device, through designing the spring bearing shaft and the retainer, the position of the bearing shaft is changed dynamically in the rolling process, the geometric compensation for the drawing force of the spring is finished, the characteristic of isoelasticity is realized, and the device is structurally more simplified, thus the production cost is lowered, the reliability of the device is improved, and the operation is simplified.

Description

technical field [0001] The invention relates to the carrying of photographic equipment, in particular to a spring arm device providing a shock absorbing function for a camera. Background technique [0002] In mobile shooting, the camera stabilizer eliminates the vibration generated during the movement through its spring arm device, so that the camera can shoot stable and smooth pictures. This technology is proposed in US patents US4208028, US5360196 and US7618016. [0003] At present, the spring arms of the camera stabilizer are mainly divided into spring arms without equal elastic properties and spring arms with equal elastic properties. [0004] Spring arms that do not have equal elastic properties are usually only installed with one or more springs at diagonal (or corresponding) positions in a planar four-bar linkage mechanism, using the change in the length or angle of the diagonal line during operation, To stretch or compress the spring to achieve shock absorption, th...

AI Technical Summary

Problems solved by technology

However, there are disadvantages of complex structure and a large number of parts involved, which will increase the production cost and affect the reliability of the equipment, and it needs to realize the equal elastic characteristics of the highest point and the lowest point through the equal elastic adjustment device, which will increase the operation process Complexity

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