Spiral window curtain holder

Abstract

The spiral window curtain holder includes upper and lower parallel spiral steel wires, slide rod and seats at two ends. The riigd steel wires in the shape of spring can be rotated by the drive mechanisms inside the seats. The slide rod has several curtain ring seats capable of shifting along the slide rod, at least one guide seat connected with the ring seats and two upwards rotating roll needles clamped onto the spiral joints. Compared with available technology, the present invented curtain needs very small drive force to be driven and is light and low noisy. In addition, the present invention has relatively lower cost.

Description

technical field [0001] The invention relates to an opening and closing device for various curtains, in particular to a curtain frame which realizes the opening and closing of the curtain by driving a screw rod-shaped transmission member to rotate. Background technique [0002] The traditional curtain opening and closing device mostly adopts the drawstring type, that is, the curtain ring is slidably worn on the curtain rod at a certain distance, and is tied to the circular pull rope at a certain distance. When opening and closing the curtain, you can use it by hand or The pull cord is pulled by the motor, so that the curtain rings fixed on the pull cord are spread out one by one and separated from each other by a certain distance, so that the curtain cloth is unfolded; otherwise, pulling the draw cord in the opposite direction makes the curtain cloth close. Since the length of the loop cord cannot be changed once assembled, the cord-only curtain rack must be "made to measure"...

AI Technical Summary

Problems solved by technology

Since the length of the loop cord cannot be changed once assembled, the cord-only curtain rack must be "made to measure" in advance for windows of non-standard widths; on the other hand, Since there is sliding friction between the curtain ring and the curtain rod it is worn on, and the weight of the curtain cloth is completely converted into the relative pressure between the curtain ring and the curtain rod through the curtain ring, according to the calculation formula of friction f=N×u( Among them, N is the relative pressure, u is the friction coefficient), so the friction force between the curtain ring and the curtain rod is relatively large, which shows that the required pulling force is relatively large and there is a large noise in use.

In view of the above problems, a screw-type curtain frame is designed, which drives the guide ring nut or the curtain ring to move left and right through the positive and negative rotation of the screw, such as the Chinese utility model patent "Screw" with the patent No. 86209502 Type Automatic Opening and Closing Curtain Device" and the Chinese utility model patent "Spiral Curtain Frame" with patent No. 90224991.6 are such designs. Since the screw rod can be shortened conveniently, it can be easily assembled on windows of different widths. , but they still have some defects: in the latter scheme, all the curtain rings are directly worn on the screw rod, that is, the whole weight of the curtain cloth is borne by the screw rod, so the required rotational driving force of the screw rod is relatively small. Large, and the screw rod may be deformed after a long time of use, which will further affect the use; in the former scheme, the curtain ring is threaded on a light rod, and a guide ring nut is integrally connected to the first curtain ring. And the guide ring nut is threaded and screwed on the screw parallel to the polished rod. In this design, the screw rod that plays a transmission role and the polished rod that plays a load-bearing role are respectively provided, so that most of the weight of the curtain cloth is borne by the polished rod. The rotational driving force required by the screw is reduced; however, in these two schemes, there is still sliding friction between the curtain ring or the ring nut and the screw that is threaded and screwed, and the friction force is relatively large, and the noise is relatively high during use. Big

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