Telescopic Rod Clamp Assembly for Simple Secure Length Adjustment

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Solution Overview

Problem

Existing telescopic rods for handheld devices have complex mechanical designs and are difficult to adjust in length, requiring numerous components and complex mechanisms.

Innovation Solution

A telescopic rod design featuring an outer tube, an inner tube, a retaining clip with a sleeve and clamping ring, and a union nut, allowing for a simple and adjustable length adjustment using a snap-in mechanism and threaded connection, reducing the number of components and construction effort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional mechanical designs with numerous components are used, then the telescopic rod can achieve stable structure, but the device complexity increases and adjustment becomes difficult

Engineering Contradiction:
Improvestructural stabilityVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The retaining clamp combines the sleeve and clamping ring into a single integrated component that performs both functions: the sleeve receives the outer tube end while the clamping ring secures the inner tube. This merging reduces the total number of components while maintaining the structural stability provided by separate elements.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The retaining clamp serves multiple functions simultaneously: it acts as both a receiver for the outer tube end and a guide/fixation mechanism for the inner tube. The union nut also serves dual purposes by both securing the clamping ring and providing the adjustment mechanism. This multi-functionality reduces component count while maintaining reliability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If traditional complex adjustment mechanisms are used, then the telescopic rod can achieve secure length adjustment, but the ease of operation decreases

Engineering Contradiction:
Improveadjustment securityVSAvoidadjustment difficulty
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The adjustment mechanism is segmented into distinct functional elements: the union nut for securing, the clamping ring for fixation, and the complementary elements for positioning. This segmentation allows each element to perform its specific function simply, making the overall adjustment process easier while maintaining security through the coordinated action of all segments.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The complementary elements act as intermediaries between the user's adjustment action and the final secured position. These elements provide a simple interface for length adjustment while ensuring secure fixation through their interaction with the retaining clamp and tubes, bridging the gap between ease of operation and adjustment security.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If numerous components are used, then the telescopic rod can achieve stable structure, but the manufacturing cost increases

Engineering Contradiction:
Improvestructural stabilityVSAvoidproduction cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

By merging the sleeve and clamping ring into a single retaining clamp component, the patent reduces the total number of parts that need to be manufactured, assembled, and inventoried. This merging maintains the structural stability provided by separate elements while significantly reducing manufacturing complexity and cost.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The retaining clamp's multi-functionality means a single component performs what would traditionally require multiple specialized parts. This universality reduces the bill of materials, simplifies manufacturing processes, and lowers assembly costs while maintaining the structural integrity and stability required for reliable telescopic rod operation.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The telescopic rod can be easily adjusted in length with minimal components, enhancing user convenience and reducing production costs, while maintaining stability and durability.

Implementation Method 1

the clamping ring exerts a force on the enclosed section of the inner tube or rod, thereby fixing the inner tube or rod to the retaining clamp

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 2

The end region of the outer tube and the socket are connected or connectable by means of mutually complementary elements

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3286441B1Telescopic rod, in particular for a handheld device
Publication Date: 2021.04.14 HUSQVARNA AB
  • EP3286441B1 patent drawingFigure 1
  • EP3286441B1 patent drawingFigure 2
  • EP3286441B1 patent drawingFigure 3

AI summary

The invention relates to a telescopic rod (10), in particular for a handheld device (40) or device system. The telescopic rod (10) has an outer tube (12) and an inner tube (14) or a rod. The inner tube (14) or the rod can be moved in the outer tube (12) along a common longitudinal axis. The telescopic rod (10) further comprises a retaining clip (16) with a sleeve (20) for receiving an end region of the outer tube (12) and a clamping ring (22) for surrounding the inner tube (14) or rod. The telescopic rod (10) additionally has a union nut (18) which is screwed or can be screwed onto the clamping ring (22) of the retaining clip (16) such that the clamping ring (22) exerts a force onto the surrounded region of the inner tube (14) or rod, and thus the inner tube (14) or the rod is fixed or can be fixed to the retaining clip (16). The end region of the outer tube (12) and the sleeve (20) are connected or can be connected by means of a latching mechanism or mutually complementary elements (26, 48).