Automatic rebounding roller shutter mechanism and tension force adjusting method

Abstract

The invention discloses an automatic rebounding roller shutter mechanism. A rotatable winding drum is arranged outside a fixed and non-rotating central shaft in a sleeving manner through bearings at the two ends; a spring is arranged on the central shaft in a sleeving manner; one end of the spring and the end part of one side of the winding drum are fixed and can synchronously rotate; the other end of the spring is fixed on a guide sleeve which can axially slide along the central shaft but cannot rotate; and the free length of the spring is smaller than that of the central shaft. According to the invention, the fixed end of the spring is fixed to one end of the winding drum, the movable end of the spring is arranged on the guide sleeve capable of moving in the axial direction the, and the torsion of the winding drum is converted into the thrust moving in the axial direction, so that stretching and retracting of the spring and sliding of the guide sleeve are achieved; the guide sleeve at the movable end only passively bears the thrust, and the stress is relatively low and even, so that sliding is smooth, jamming or damage is not easy, the sliding end is prevented from being damaged due to overlarge stress, and a sliding section can be protected to have the relatively long service life; and meanwhile, radial deformation of the spring is relieved, so that the spring is protected.

Description

technical field [0001] The invention relates to the technical field of rolling blinds, in particular to an automatic rebounding rolling blind mechanism and a tension adjustment method. Background technique [0002] The roller shutter mechanism can achieve isolation effects such as shading, rain protection, wind protection, and protection. Chinese invention patent ZL2018207264894 discloses a rolling shutter type deceleration hidden screen window, including a yarn box, a left yarn box block, a right yarn box block, two The guide rail, gauze, tension beam, bottom frame and gauze deceleration and rewinding mechanism, the left and right yarn box plugs are respectively set at the two ends of the yarn box; the upper end of the gauze is set on the yarn In the box, the lower end of the gauze is fixed with the tension beam; the gauze deceleration and rewinding mechanism is set in the gauze box, and the gauze deceleration and rewinding mechanism includes a left casing, a damper, an int...

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Problems solved by technology

[0003] The applicant aims at the disadvantages of the above-mentioned disadvantages such as the internal structure spring of the roller in the roller blind machine being easily damaged, etc., and provides a roller blind mechanism with a reasonable structure and automatic rebound. By fixing the fixed end of the spring to one end of the roller, The movable end of the spring is set on the guide sleeve that can move in the axial direction, which converts the torsion force of the reel into the thrust that moves in the axial direction, so as to realize the expansion and contraction of the spring and the sliding of the guide sleeve. The guide sleeve at the movable end only passively bears the thrust and force It is more relaxed and even, so it slides smoothly, and it is not easy to get stuck or damaged

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