Adjustable cord locker and window blind having such adjustable cord locker

Patent metadata

Field	Value
Publication number	US-9458664-B2
Application number	US-201414447887-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Jul 31, 2014
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

An adjustable cord locker for fastening at least a lift cord to a bottom rail and regulating a length of the lift cord includes a barrel, a reel, and a control wheel. The reel is received in the barrel for rotation by control. The lift cord is inserted into the barrel and fastened to the reel to be wound around the reel when the reel is turning. The control wheel is connected to the reel for a user to operate to turn the reel. The control wheel is provided with teeth, and the barrel is provided with a pawl. The pawl is engaged with the teeth to allow the control wheel to be turned or hold still.

First claim

What is claimed is:

1. An adjustable cord locker, comprising:
a barrel;
a reel rotatably received in the barrel, wherein at least a lift cord is fastened to the reel to be wound around the reel while the reel is being rotated;
a control wheel connected to the reel, wherein the barrel has a bottom opening and a pawl provided therein; the control wheel is provided with teeth to be engaged with the pawl to hold the reel still;
a rotational axis of the reel is substantially parallel to an axial direction of the barrel, and the control wheel is connected to an end of the reel to cover the bottom opening of the barrel; and
the control wheel has a through hole; the reel has a cord portion and a leg; the lift cord is wound on the cord portion; the leg is inserted into the through hole of the control wheel such that the control wheel moves along the leg between a first position and a second position; the pawl is engaged with the teeth of the control wheel when the control wheel is moved to the first position, and the pawl is disengaged with the teeth of the control wheel when the control wheel is moved to the second position.

2. The adjustable cord locker of claim 1 , wherein the teeth of the control wheel are ratchet teeth which allow the control wheel to rotate in one direction only.

3. The adjustable cord locker of claim 1 , wherein the reel is substantially vertical to an axial direction of the barrel, and some of the teeth of the control wheel extend out of the barrel through the bottom opening.

4. The adjustable cord locker of claim 1 , wherein the barrel is provided with a flexible arm, on which the pawl is provided.

5. The adjustable cord locker of claim 1 , further comprising an elastic member between the reel and the control wheel to urge the control wheel toward the first position.

6. The adjustable cord locker of claim 1 , wherein the barrel is provided with a side opening on an annular wall thereof, and the reel is provided with a cord hole; the lift cord passes through the side opening and the cord hole in sequence, and is knotted to fasten the lift cord to the reel.

7. The adjustable cord locker of claim 1 , wherein the barrel has a top opening communicated with the bottom opening.

8. The adjustable cord locker of claim 7 , wherein the barrel is provided with a top board, on which the top opening is provided; the top board further has a bore, and the reel has an end engaged with the bore; the control wheel is provided with a driving portion for receiving an external force to turn the control wheel.

9. The adjustable cord locker of claim 7 , wherein the reel is provided with a cord hole; the lift cord passes through the top opening and the cord hole in sequence, and is knotted to fasten the lift cord to the reel.

10. A window blind, comprising:
a headrail;
a bottom rail;
a plurality of slats between the headrail and the bottom rail;
at least a lift cord passing through the headrail and the slats in sequence, and connected to the bottom rail through an adjustable cord locker, wherein the adjustable cord locker comprises:
a barrel;
a reel received in the barrel for rotation, wherein the lift cord is fastened to the reel to be wound around the reel while the reel is being rotated;
a control wheel connected to the reel, wherein the barrel has a bottom opening and a pawl provided therein; the control wheel is provided with teeth to be engaged with the pawl to hold the reel still;
a rotational axis of the reel is parallel to an axial direction of the barrel, and the control wheel is connected to an end of the reel to cover the bottom opening of the barrel; and
the control wheel has a through hole; the reel has a cord portion and a leg; the lift cord is wound on the cord portion; the leg is inserted into the through hole of the control wheel such that the control wheel move along the leg between a first position and a second position; the pawl is engaged with the teeth of the control wheel when the control wheel is moved to the first position, and the pawl is disengaged with the teeth of the control wheel when the control wheel is moved to the second position.

11. The adjustable cord locker of claim 10 , wherein the teeth of the control wheel are ratchet teeth which allow the control wheel to rotate in one direction only.

12. The adjustable cord locker of claim 10 , wherein the reel is vertical to an axial direction of the barrel, and some of the teeth of the control wheel extend out of the barrel through the bottom opening.

13. The adjustable cord locker of claim 10 , wherein the barrel is provided with a flexible arm, on which the pawl is provided.

14. The adjustable cord locker of claim 10 , further comprising an elastic member between the reel and the control wheel to urge the control wheel toward the first position.

15. The adjustable cord locker of claim 10 , wherein the barrel is provided with a side opening on an annular wall thereof, and the reel is provided with a cord hole; the lift cord passes through the side opening and the cord hole in sequence, and is knotted to fasten the lift cord to the reel.

16. The adjustable cord locker of claim 10 , wherein the barrel has a top opening communicated with the bottom opening.

17. The adjustable cord locker of claim 16 , wherein the barrel is provided with a top board, on which the top opening is provided; the top board further has a bore, and the reel has an end engaged with the bore; the control wheel is provided with a driving portion for receiving an external force to turn the control wheel.

18. The adjustable cord locker of claim 16 , wherein the reel is provided with a cord hole; the lift cord passes through the top opening and the cord hole in sequence, and is knotted to fasten the lift cord to the reel.

Assignees

• Nien Made Entpr Co Ltd

Inventors

• Wen Yu-Che
• Nien Chao-Hung
• Qu xu-wu

Classifications

• E06B9/388

  Details of bottom or upper slats or their attachment · CPC title

• E06B9/324 Primary

  Cord-locks {(cord-locks for curtains A47H3/00)} · CPC title