Compressed type shading curtain winding device of internal sealing tube

Abstract

The invention discloses a compressed type shading curtain winding device of an internal sealing tube. The compressed type shading curtain winding device includes core iron, an inner tube, a spring bead and a torsion spring, wherein the inner tube is used for winding the shading curtain, and the spring bead and the torsion spring are accommodated in one end of the inner tube. A center hole coaxial with the core iron is preserved in the spring bead. The spring bead is formed by clamping a male spring bead and a female spring bead. One end of the core iron is connected with an internal sealing cover, and the other end of the core iron is connected with a fixing block of the core iron. A compressed spring is sleeved on the core iron and is accommodated in the center hole preserved in the spring bead. At least two clamping tenons are arranged on the core iron. Compression through the internal sealing cover replaces integral compression of the external sealing cover, and the external sealing cover only needs to be fixedly matched with the external tube, so friction noise and friction marks generated through sliding fit of the external sealing cover and the external tube are reduced.

Description

technical field [0001] The invention relates to an inner-sealed tube compression type curtain retracting device. Background technique [0002] Roll-up blinds are widely used in automobiles, offices and other places, and have gradually become an indispensable product in modern life. [0003] The retracting device of the shade in the prior art usually consists of a torsion spring, a core iron, and a roll rod. The torsion spring provides torsion for the retraction of the shade. Pendulum, usually for the convenience of installation, the retracting device will also have an additional compression spring, but this compression spring and torsion spring are separated, because there are many parts in the curtain itself, plus the additional compression spring Other external installation mechanisms cause inconvenience in the assembly of the covering curtain, increase labor costs, and reduce production efficiency. [0004] Furthermore, in the prior art, the outer cover provided on the ...

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Problems solved by technology

[0003] The retracting device of the shade in the prior art usually consists of a torsion spring, a core iron, and a roll rod. The torsion spring provides torsion for the retraction of the shade. Pendulum, usually for the convenience of installation, the retracting device will also have an additional compression spring, but this compression spring and torsion spring are separated, because there are many parts in the curtain itself, plus the additional compression spring and other external installation mechanisms, resulting in inconvenient assembly of the curtains, increasing labor costs and reducing production efficiency

[0004] Furthermore, in the prior art, the outer cover provided on the curtain retracting device mostly slides and fits with the outer tube. In actual use, the friction between the outer cover and the outer tube is also a major cause of noise. In addition, the coaxiality between the core iron and the spring is not high, and the stability of the entire retracting device is greatly reduced during the process of retracting and compressing, and it is prone to vibration and noise.

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