Window Shade Having a Resistance Balancing Mechanism

a technology of resistance and balancing mechanism, which is applied in the direction of shutters/movable grilles, door/window protective devices, wing arrangements, etc., can solve the problems of children strangling on the operating cord, etc., and achieve the effect of accurately holding the shading structure and convenient adjustment of the shad

Inactive Publication Date: 2013-02-07
TEH YOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]At least one advantage of the window shades described herein is the ability to conveniently adjust the shade by raising and lowering the lower rail. Moreover, the assembly of the resistance balancing unit in the window shade can allow to accurately hold the shading structure at any height.

Problems solved by technology

While the use of the operating cord may be convenient for an adult, there is the risk that children strangle on the operating cords.

Method used

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  • Window Shade Having a Resistance Balancing Mechanism
  • Window Shade Having a Resistance Balancing Mechanism
  • Window Shade Having a Resistance Balancing Mechanism

Examples

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Embodiment Construction

[0032]FIGS. 1 and 2 are schematic views illustrating one embodiment of a hand-pull type window shade 100. More particularly, FIG. 1 shows the window shade 100 in a downwardly deployed state, and FIG. 2 shows the window shade 100 in an upwardly retracting state. The window shade 100 can include a first rail 102, a second rail 104, a shading structure 106, suspension cords 108, resistance balancing units 110 and a cord winding unit 112. The shading structure 106 can have upper and lower ends respectively affixed with the first rail 102 and the second rail 104. The resistance balancing units 110 and the cord winding unit 112 can be respectively installed in the second rail 104. In one embodiment, two resistance balancing units 110 and one cord winding unit 112 can be provided to form a control module of the window shade 100, the cord winding unit 112 being installed between and spaced apart from the two resistance balancing units 110. Each of the suspension cords 108 can have a first e...

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PUM

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Abstract

A window shade comprises first and second rails, and a shading structure and a suspension cord connected between the first and second rails. The second rail includes a resistance balancing unit and a cord winding unit to which the suspension cord respectively connects. The resistance balancing unit comprises a housing having an abuttal surface, a pulley pivotally connected with the housing, and a torsion spring. The pulley has a winding portion around which the suspension cord is wrapped, and a shaft portion extending coaxial to the winding portion from a side thereof. The torsion spring is tightly mounted around the shaft portion and has at least one end. The pulley when rotating in one direction drives the end of the torsion spring to push against the abuttal surface of the housing, whereby the torsion spring loosens to allow rotation of the pulley relative to the torsion spring.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to Taiwan Patent Application No. 100127779 filed on Aug. 4, 2011.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to window shades.[0004]2. Description of the Related Art[0005]Many types of window shades are currently available on the market, such as Venetian blinds, roller shades and honeycomb shades. The shade when lowered can cover the area of the window frame, which can reduce the amount of light entering the room through the window and provided increased privacy. A typical window shade can include a top rail, a bottom rail, a shading panel and a drive mechanism. The bottom rail is usually connected with a lower end of the shading panel, whereas the drive mechanism is assembled in the top rail. The drive mechanism can include a winding drum, and an operating cord extending outside the top rail. A user can actuate the operating cord to drive rotation of the winding drum, wh...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A47H5/032
CPCA47H5/032E06B2009/3222E06B2009/2627E06B9/322
Inventor YU, FU-LAIHUANG, CHIN-TIEN
Owner TEH YOR CO LTD
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