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Window shade

a technology for windows and doors, applied in the field of windows, can solve the problems of affecting the stability of the lift cord for the longer window shade, affecting the safety of the door/window, and the longer window shade is more difficult to control the movement of the longer window shade through the lift cord, so as to facilitate the retraction and extension of the window shade

Inactive Publication Date: 2009-11-19
SUZHOU HONGYI ORNAMENT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003]The present invention aims to provide a window shade to resolve the aforesaid problems of the conventional longer window shade that is more difficult to retract and causes too heavy of transmission load on the transmission means by providing a novel transmission means which incorporates a lift cord means and a bead chain means to generate concurrent transmission to facilitate retraction and extension of the window shade.
[0005]The window shade thus constructed can achieve the following benefits: 1. during retraction of the window shade, the bead chain of the bead chain means drives the transmission means, so that the lift cord means and the bead chain means transmit concurrently. With the aid of the bead chain means, the lift cord means can extend or retract the shade assembly easier, and transmission load of the bead chain means can be reduced; 2. when the retracted longer window shade is to be lowered and extended, the weight of the shade assembly which is much greater than the bead chain means can reduce the transmission load of the transmission means. Hence the power needed to extend the longer window chain can be reduced.

Problems solved by technology

Moreover, moving stability of the lift cord for the longer window shade is not desirable.
The longer the window shade, the greater imbalance occurs to the window shade.
It becomes more difficult to control the movement of the longer window shade through the lift cord.
As a result, the lift cord and transmission means are prone to damage after a period of time.
The lift span of the longer window shade suffers.
Moreover, the transmission means of the longer window shade wears off easily, and has to be replaced frequently.
Retraction or extension of the longer window shade also is more difficult.

Method used

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Embodiment Construction

[0017]Please refer to FIGS. 1 and 2, a window shade according to the invention mainly includes an upper track 10, a lower track 20, a shade assembly 30, a lift cord means 40 and a bead chain means 50.

[0018]The upper track 10 is hollow and elongate, and has openings 11 and 12 at two ends to be wedged in respectively by an anchor seat 13, and has a first latch hole 14 and a second latch hole 15 and a trough 16 at the bottom thereof.

[0019]The lower track 20 is elongate and spaced from the upper track 10 at a lower side, and has a wedge trough 21 and openings 22 and 23 at two ends to be wedged in by edge sealing elements 24 corresponding to the wedge trough 21.

[0020]The shade assembly 30 is located between the upper track 10 and the lower track 20, and includes a slat 31 which may be a beehive slat, a Venetian blind slat assembly or pleated blind slat assembly. In the embodiment shown in the drawings, the slat 31 is a beehive slat with an upper end and a lower end forming respectively a...

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PUM

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Abstract

A window shade includes an upper track, a lower track, a shade assembly, a lift cord means and a bead chain means. The lift cord means includes two boxes located in the upper track at two sides thereof and a flattened cord winding on the periphery of a jutting ring located in each box. By coupling a transmission axle with a transmission means located at one side of the bead chain means a concurrent transmission can be formed. Thereby the bead chain can aid retraction of the shade assembly through the transmission means to reduce transmission load of the bead chain means. The bead chain means of a suitable loading capability can be selected according to the weight of the shade assembly to reduce the load of the transmission means to facilitate extension of the shade assembly.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a window shade and particularly to a window shade movable through concurrent transmission of a lift cord means and a bead chain means to facilitate retraction or extension of a shade assembly.BACKGROUND OF THE INVENTION[0002]There are many different types of window shades on the market such as Venetian blinds, pleated window shades, roman shades and the like. They mainly aim to be installed at doors and windows of houses to block sunshine and serve decorative purpose. According to different user's requirements, the general window shades can be divided into one type which has a shade structure driven by a lift cord to control retraction and extension, and another type which has a longer window shade. When the longer window shade is retracted, the resulting size is larger, especially if the lift cord is a round one. The round lift cord tends to slip left and right after retraction. Moreover, moving stability of the lift cord...

Claims

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Application Information

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IPC IPC(8): A47H5/00A47H23/00
CPCE06B2009/2627E06B9/262
Inventor WANG, CHIH-YUNG
Owner SUZHOU HONGYI ORNAMENT MATERIAL
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