Curtain structure without drawstring

• US 8,936,062 B2
• Filed: 03/18/2013
• Issued: 01/20/2015
• Est. Priority Date: 03/18/2013
• Status: Expired due to Fees

• Current Assignee: Hua-Chi Huang
• Original Assignee: Hua-Chi Huang
• Inventors: Huang, Hua-Chi
• Primary Examiner(s): Mitchell, Katherine
• Assistant Examiner(s): Shablack, Johnnie A
• Application Number:
  US13/846,766
• Publication Number:
  US 20140262063A1
• Time in Patent Office: 673 Days
• Field of Search: 160/170, 160/297, 160/84.01, 160/84.02, 160/191, 160/192, 160/168.1 R, 160/173.R, 160/188
• US Class Current: 160/170
• CPC Class Codes: E06B 2009/2625 Pleated screens, e.g. concertina- or accordion-like
• CPC Class Codes: E06B 2009/2627 Cellular screens, e.g. box or honeycomb-like
• CPC Class Codes: E06B 2009/3222 Cordless, i.e. user interface without cords
• CPC Class Codes: E06B 9/322 Details of operating devices, e.g. pulleys, brakes, spring drums, drives operating devices E06B9/68 ; devices of general interest specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material B65H75/34

Abstract

A curtain structure without drawstring may include a curtain unit, a string scrolling base and an upper cover. The string scrolling base has a shell disposed in the base of the curtain unit, center portion of the shell having a shaft, both sides of which having a positioning shaft, and a line slot formed on both side walls of the positioning shaft, wherein upper periphery of rotating base has driving teeth having at least one groove, restricting guiding groove and arc rail groove on top surface thereof, and a driving unit is disposed on the positioning shafts, the driving unit having a rod to secure the string collecting bodies, and conjugating teeth are linked with the driving teeth of the rotating base; and an upper cover having a restricting groove corresponding to the rotating base, and a ball restricted in the groove of the restricting groove and the rotating base.

Claims

1. A curtain structure without

a drawstring comprising

a curtain unit, having a base and curtain pieces disposed downward therefrom, two string collecting bodies used to drive the curtain unit, and a board disposed on a bottom portion thereof;

a string scrolling base having a shell disposed in the base of the curtain unit, a center portion of the shell having a shaft, two positioning shafts located adjacent to opposing side walls of the shell so that the shaft is located between each positioning shaft, a line slot formed on each opposing side wall of the shell, wherein the shaft and a rotating base are hingedly coupled, and a spring disposed between the shaft and rotating base; and

an upper periphery of the rotating base has driving teeth having at least one groove on a top surface thereof, wherein a restricting guiding groove is next to the at least one groove, and an arc rail groove is next to the restricting guiding groove; and

a respective driving unit is disposed on each positioning shaft, each driving unit having a rod to secure the respective string collecting body, and conjugating teeth of the driving units are linked with the driving teeth of the rotating base; and

an upper cover corresponding to the shell, having a restricting groove corresponding to the rotating base, and a ball restricted in the groove of the restricting groove and the rotating base.

2. The curtain structure of claim 1, wherein two positioning slots are disposed in the base of the curtain unit, and a bottom of the shell of the string scrolling base has protruding ribs, so as to secure the string scrolling base inside the base.

3. The curtain structure of claim 1, wherein peripheries of the shaft and positioning shafts are each surrounded by a positioning wall and a restricting wall.

4. The curtain structure of claim 1, wherein a shaft slot is formed downwardly from the shaft, and an engaging portion is formed outside the rotating base, so that the spring is connected and disposed between the shaft and rotating base.