Magnetic Contact Structure for Rollable Antenna Grounding

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Solution Overview

Problem

Rollable electronic devices face challenges in maintaining effective antenna radiation performance due to parasitic resonance issues, which are exacerbated by the sliding motion of their components, leading to potential wear and tear of contact structures used for grounding.

Innovation Solution

The implementation of a contact structure that uses magnets to electrically connect the ground of one housing to the conductive portion of another, allowing for improved antenna radiation performance by preventing parasitic resonance and reducing wear through magnetic coupling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a contact structure is used to connect ground to conductive portion in a rollable electronic device, then parasitic resonance is eliminated and antenna radiation performance is improved, but the contact structure is worn out due to friction from sliding motion

Engineering Contradiction:

Improveantenna radiation performanceVSAvoidcontact structure lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent replaces the mechanical sliding contact structure with a magnetic field-based contactless coupling system. The magnetic coupling mechanism eliminates physical friction and wear while maintaining electrical connection functionality for grounding the conductive portion, thereby preserving antenna radiation performance without degrading contact structure lifespan.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the ground and the conductive portion. This magnetic intermediary enables energy and signal transmission without direct physical contact, eliminating friction-related wear while achieving the grounding function necessary for eliminating parasitic resonance.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the second housing slides relative to the first housing to enable rollable function, then device flexibility is achieved, but the contact structure experiences friction and wear

Engineering Contradiction:

Improverollable functionVSAvoidfriction and wear

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent substitutes the mechanical sliding contact with a magnetic coupling system that maintains electrical connection during housing movement. This replacement eliminates friction and wear caused by sliding motion while preserving the rollable function's adaptability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic coupling system automatically maintains connection during sliding motion without requiring mechanical adjustment or intervention. The magnetic field self-adjusts to maintain coupling integrity throughout the range of motion, eliminating wear from repeated mechanical engagement.

Inventive Principle:

Principle #25Self-service

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

This solution enhances antenna radiation performance by minimizing parasitic resonance and extends the lifespan of contact structures by reducing friction-related wear, ensuring reliable communication across various device states.

Implementation Method 1

at least one contact structure comprising a conductor may be configured to electrically connect the ground of the first housing to the conductive portion of the second housing

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

Methodology Applied

Scientific EffectMagnetism: Magnetism

Data Source

PatentUS20250004504A1Electronic device including contact structure using magnet

Publication Date: 2025.01.02 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device according to various embodiments of the disclosure may include: a housing including a first housing and a second housing, a wireless communication circuit, and at least one contact structure comprising a conductor, wherein the first housing may include a ground and the second housing may include a conductive portion, wherein, in a first state, the second housing may be configured to move in a first direction to be changed to a second state and, in a second state, the second housing may be configured to move in a second direction to be change to the first state, and wherein, in the first state, the at least one contact structure may be configured to electrically connect the ground of the first housing to the conductive portion of the second housing, and the wireless communication circuit may be configured to receive a signal by feeding power to a point of the conductive portion of the second housing.