Long blade torsion resistant window blind

Abstract

The invention relates to the field of window blinds, in particular to a long blade torsion resistant window blind. The long blade torsion resistant window blink comprises blades and window frames. A transmission case frame is connected between the two window frames, and the window frames are provided with shaft sleeves and rotating shafts. The rotating shafts are provided with clamping jaws used for clamping the blades, and first rails are arranged in the window frames. First spur racks are arranged in the first rails, first gears are arranged on the rotating shafts, and the first gears are engaged with the first spur racks. The long blade torsion resistant window blind aims to lower the deformation of the long blades due to torsion. Rigidity braces move in second rails, while the first spur rack in the top window frame is pulled, the first spur rack in the bottom window frame is also pushed. The top ends of the blades are suffered from torsion, the bottom ends of the blades drive first gears in the bottom window frame to rotate through the clamping jaws, the first gears are also pushed by the first spur racks at the same time, and therefore the two ends of the blades can highly synchronously rotate. Accordingly, the difference of the torsion suffered by the two ends of the blades is reduced, and the deformation produced when the blades are suffered from the torsion is lowered.

Description

technical field [0001] The invention relates to the field of shutters, in particular to a long blade torsion-resistant shutter. Background technique [0002] The louver blades in the prior art generally rotate around their central axis, and a driving mechanism is provided at one end of the louver blades to drive the louver blades to turn over. [0003] The above-mentioned dual-power doorless weathertight shutters include a manual actuator. The manual actuator includes a box fixed in the frame, a worm shaft and a worm pivotally connected to the box. The worm shaft is parallel to the drive shaft, and the drive shaft is fixed with For the third gear, a fourth gear meshed with the third gear and a worm wheel meshed with the worm are arranged on the worm shaft, and a hand wheel is fixed at the outer end of the worm. When the handwheel is turned, the worm gear is driven to rotate the worm gear shaft, and then the fourth gear drives the third gear to rotate, thereby adjusting the ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned dual-power doorless weathertight louvers are: when the louver blades are driven to rotate, the torsional force on both ends of the blades is quite different, so the louver blades are easily distorted and deformed, and the deformation of the shorter louver blades is small, but if For longer louver blades (such as building exterior wall louvers), the amount of deformation will increase, resulting in uneven gaps between adjacent louver blades

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