Window covering system and displacement controlling device thereof

Patent metadata

Field	Value
Publication number	US-10731408-B2
Application number	US-201715407219-A
Country	US
Kind code	B2
Filing date	Jan 16, 2017
Priority date	Jan 29, 2016
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A displacement controlling device comprises a shaft having a displacement region, a movable unit connected to the shaft and configured to move within the displacement region, a damper connected to one end of the shaft, and a restraint unit arranged between the movable unit and the damper, wherein the restraint unit is configured to be driven by the movable unit from a first position toward a second position; the damper outputs a resistance when the restraint unit is at the first position, and the damper stops outputting the resistance if the restraint unit is at the second position.

First claim

What is claimed is:

1. A displacement controlling device, comprising:
a shaft having a displacement region;
a movable unit connected to the shaft and configured to move within the displacement region;
a damper connected to one end of the shaft; and
a restraint unit arranged between the movable unit and the damper, wherein the restraint unit is configured to be moved by the movable unit from a first position to a second position when the movable unit approaches the damper; the restraint unit returns to the first position from the second position when the movable unit moves away from the damper;
wherein, when the restraint unit is at the first position, the restraint unit restricts the damper, and the damper outputs a resistance as a result of being restricted by the restraint unit;
and wherein, when the restraint unit is at the second position, the damper is not restricted by the restraint unit and therefore stops outputting the resistance.

2. The displacement controlling device of claim 1 , wherein the shaft is a long rod body, and the movable unit is sleeved over the long rod body, wherein the movable unit is configured to move along an axial direction of the long rod body.

3. The displacement controlling device of claim 2 , wherein the long rod body is a threaded rod and the movable unit is a nut.

4. The displacement controlling device of claim 1 , wherein the damper comprises a cover and a rotatable unit in the cover; the rotatable unit is configured to rotate relative to the cover when the restraint unit is at the first position; the rotatable unit and the cover are configured to rotate simultaneously when the restraint unit is at the second position.

5. The displacement controlling device of claim 4 , wherein the restraint unit is a coil spring around an external surface of the shaft, one end of the coil spring is a fixed end fixed to the cover, and another end of the coil spring is a free end, the coil spring is sleeved over the shaft for restricting the cover from rotating, whereby the damper is configured to output the resistance when the free end of the coil spring is at the first position.

6. The displacement controlling device of claim 5 , wherein the free end is configured to move toward the fixed end when the free end is driven from the first position toward the second position, and the damper is configured to stop outputting the resistance when the free end is at the second position such that a diameter of the coil spring is larger than a diameter of the shaft and the cover is rotatable.

7. The displacement controlling device of claim 4 , wherein the cover has a gear corresponding to the restraint unit such that the restraint unit is configured to engage to the gear.

8. The displacement controlling device of claim 7 , wherein the restraint unit is a pivot latch, wherein one end of the pivot latch adjacent to the gear is a latch part, and the other end of the pivot latch away from the gear is a blocking part; the damper is configured to output the resistance when the latch part engages to the gear at the first position such that the rotatable unit rotates relative to the cover.

9. The displacement controlling device of claim 8 , wherein the movable unit is configured to move toward the pivot latch to urge the blocking part for pivoting the pivot latch such that the latch part moves from the first position toward the second position away from the gear, and wherein the damper is configured to stop outputting the resistance when the latch part reaches the second position and disengages from the gear such that the rotatable unit and the cover are configured to rotate simultaneously.

10. The displacement controlling device of claim 8 , further comprising a linking unit between the movable unit and the pivot latch, wherein the movable unit is configured to move along the shaft toward the pivot latch for pivoting the linking unit such that one end of the linking unit pivots the pivot latch by urging the blocking part of the pivot latch, whereby the latch part moves from the first position toward the second position away from the gear, and wherein the damper is configured to stop outputting the resistance when the latch part disengages from the gear at the second position such that the rotatable unit and the cover rotate simultaneously.

11. The displacement controlling device of claim 8 , wherein a pivot of the pivot latch is eccentric relative to the pivot latch, and the latch part of the pivot latch is at the first position while the pivot latch is not pivoted by the movable unit.

12. The displacement controlling device of claim 8 , wherein the pivot latch comprises an elastic unit which provides a recovery force for urging the latch part toward the first position constantly, and the latch part of the pivot latch is at the first position while the pivot latch is not pivoted by the movable unit.

13. The displacement controlling device of claim 7 , wherein the restraint unit is a latch connected to the shaft and adjacent the gear, wherein one end of the latch is radially away from an axis of the shaft when the latch is at the first position, and wherein the latch is protruding from an external surface of the shaft and for engaging to the gear, whereby the damper outputs the resistance.

14. The displacement controlling device of claim 13 , wherein the movable unit is configured to move to operate the latch from the first position toward the second position such that the latch is urged radially inward relative to the axis of the shaft, whereby the latch disengaged from the gear such that the damper stops outputting the resistance when the latch reaches the second position.

Assignees

• Nien Made Entpr Co Ltd

Inventors

• Wei Shui-Dong
• Nien Keng-Hao

Classifications

• E06B9/34

  roller-type; {Roller shutters with adjustable lamellae} · CPC title

• F16H29/12

  between rotary driving and driven members (F16H29/20, F16H29/22 take precedence) · CPC title

• E06B2009/807

  Brakes preventing fast screen movement · CPC title

• E06B9/307

  Details of tilting bars and their operation · CPC title

• E06B9/322 Primary

  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) · CPC title