Pivoting Assembly Friction Positioning Without Pins or Bolts

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Solution Overview

Problem

Conventional pivoting assemblies require positioning pins or bolts, increasing component count and production costs, and making them less compact due to the added distance between the casing and base.

Innovation Solution

A pivoting assembly with a positioning function that uses curved elastic arms and protrusions for friction fit, eliminating the need for positioning pins or bolts, allowing for compact design and reduced component count, and enhanced assembly ease through elastic abutment and optional teeth engagement for increased friction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a positioning pin or bolt is used to fix the casing and base, then the positioning function is achieved, but the number of components and production cost increase

Engineering Contradiction:

Improvepositioning functionVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes the positioning pin or bolt from the assembly by integrating the positioning function directly into the curved elastic arm structure. The curved elastic arm itself provides both connection and positioning functions, eliminating the need for separate positioning components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent combines the positioning function with the connection function into a single integrated structure. The curved elastic arm simultaneously serves as both the connecting element and the positioning element, merging multiple functions into one component.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a positioning pin or bolt is used to fix the casing and base, then the positioning function is achieved, but the distance between the casing and base increases

Engineering Contradiction:

Improvepositioning functionVSAvoiddistance between casing and base

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent removes the positioning pin or bolt that created the distance gap, allowing the casing and base to be positioned closer together while maintaining the positioning function through the elastic abutment mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a positioning pin or bolt is used to fix the casing and base, then the positioning function is achieved, but the assembly becomes more complex and costly

Engineering Contradiction:

Improvepositioning functionVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent eliminates the positioning pin or bolt, reducing the number of parts that need to be manufactured, inventoried, and assembled, thereby lowering production costs.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent integrates the positioning function into the existing curved elastic arm structure, so no additional positioning components need to be manufactured or assembled, reducing manufacturing complexity and cost.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If a positioning pin or bolt is used to fix the casing and base, then the positioning function is achieved, but the assembly and repair become more difficult

Engineering Contradiction:

Improvepositioning functionVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent removes the positioning pin or bolt that required separate assembly steps, simplifying both initial assembly and future repair operations.

Inventive Principle:

Principle #2Taking out (Extraction)

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 solution reduces production costs, simplifies assembly, and achieves a compact design by eliminating the need for positioning pins or bolts while maintaining effective positioning through enhanced friction fit, allowing for easier assembly and reduced component count.

Implementation Method 1

elastic abutment between the curved portion and the curved elastic arm makes the casing to be positioned by friction fit with respect to the base

Methodology Applied

Scientific EffectElastic abutment: Elasticity

Implementation Method 2

elastic abutment between the curved portion and the curved elastic arm makes the casing to be positioned by friction fit with respect to the base

Methodology Applied

Scientific EffectFriction fit: Friction

Implementation Method 3

the curved elastic arm of the base and the curved portion of the casing are respectively formed with teeth engaged with each other to thereby increase the degree of friction fit between the base and the casing

Methodology Applied

Scientific EffectTeeth engagement: Gear

Data Source

PatentUS8651437B2Pivoting assembly with positioning function

Publication Date: 2014.02.18 ALPHA NETWORKS INC

AI summary

A pivoting assembly with a positioning function includes a base and a casing assembled with the base. The base is provided with curved elastic arms and two fixing supports. Each fixing support has a pivotal hole. One surface of the casing is formed with a curved portion for allowing the curved elastic arm to abut against and two holes for allowing the fixing support to pass through. The other surface of the casing is formed with a protrusion pivotally connected to the pivotal hole. When the curved portion slides on the curved elastic arm, elastic abutment between the curved portion and the curved elastic arm makes the casing to be positioned by friction fit with respect to the base.