Wand assembly for use with a vertical architectural-structure covering

Solution Overview

Problem

Existing vertical architectural-structure covering systems require users to operate the tilt wand and operating cord with both hands due to twisting issues and non-intuitive operation, making it difficult to control the angle and extension/retraction of the covering effectively.

Innovation Solution

A wand assembly with a single gripping part at the bottom end for single-handed operation, featuring a rotatable inner wand and a static outer wand, where the operating cord is decoupled from the inner wand to prevent twisting, and a cord tensioner to maintain cord tension, allowing separate manipulation of the tilt wand and operating cord.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the tilt wand and operating cord are integrated in existing systems, then both functions are combined in one assembly, but the operating cord twists during tilt wand manipulation and dual-hand operation becomes necessary

Engineering Contradiction:

Improvesingle-handed operationVSAvoidwand assembly structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The wand assembly is divided into separate functional components: an outer wand that remains stationary and an inner wand that rotates independently. The operating cord is attached to the outer wand while the tilt control mechanism is attached to the inner wand. This segmentation allows the inner wand to rotate for tilt adjustment without causing the operating cord to twist, enabling single-handed operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The rotating function is extracted from the outer wand and assigned to the inner wand. By separating the rotation function from the cord attachment point, the patent eliminates the twisting problem that occurs when the cord is attached to a rotating component. The inner wand handles all rotational movement while the outer wand remains stable for cord attachment.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If the operating cord is attached to the tilt wand, then both controls are integrated, but rotation of the tilt wand causes the operating cord to twist and tangle

Engineering Contradiction:

Improveindependent control manipulationVSAvoidcord twisting

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The wand assembly is divided into separate functional components: an outer wand that remains stationary and an inner wand that rotates independently. The operating cord is attached to the outer wand while the tilt control mechanism is attached to the inner wand. This segmentation allows the inner wand to rotate for tilt adjustment without causing the operating cord to twist, enabling single-handed operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The outer wand serves as an intermediary between the user's hand and the operating cord. By attaching the cord to the stationary outer wand rather than the rotating inner wand, the patent creates a stable interface that prevents twisting while still allowing full rotational control of the tilt function through the inner wand.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If existing wand assemblies require two hands for operation, then control precision may be maintained, but user convenience and speed of operation are reduced

Engineering Contradiction:

Improveoperation speedVSAvoidsingle-handed control

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The wand assembly is divided into separate functional components: an outer wand that remains stationary and an inner wand that rotates independently. The operating cord is attached to the outer wand while the tilt control mechanism is attached to the inner wand. This segmentation allows the inner wand to rotate for tilt adjustment without causing the operating cord to twist, enabling single-handed operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic independence between the two wand components. The inner wand is free to rotate dynamically for tilt control while the outer wand remains relatively static for stable cord attachment. This dynamic separation allows one-handed operation where the thumb can rotate the inner wand while fingers hold the outer wand steady.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11299931B2Wand assembly for use with a vertical architectural-structure covering

Publication Date: 2022.04.12 HUNTER DOUGLAS INC

AI summary

A wand assembly for use with an architectural-structure covering is disclosed. The wand assembly may include a first operating element (e.g., an operating cord) for moving the covering between extended and retracted positions and a second operating element (e.g., a tilt wand) for adjusting rotation of the covering between open and closed configurations. The first and second operating elements are coupled to a handle assembly via separate and distinct coupling mechanisms so that manipulation of the second operating element does not affect the first operating element thereby preventing twisting of the first operating element about the second operating element. The wand assembly may include a first, inner rotatable wand and a second, stationary outer wand. The inner wand is rotatable relative to the outer wand so that rotation of the inner wand does not rotate the outer wand, and hence the first operating element coupled to the outer wand.