Rotating Bezel Radio Wave Shielding for Bluetooth Interference

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Solution Overview

Problem

Existing wireless communication devices face interference issues when multiple electronic devices are present, particularly with Bluetooth communications, as they struggle to accurately pair without interfering with unintended devices, and require complex mechanisms to adjust radio wave sensitivity for different usage scenarios.

Innovation Solution

A sensitivity adjustment device with a rotating bezel that includes a shielding part and a penetration part, allowing the user to adjust the radio wave sensitivity of an antenna by changing the positional relationship between these components, thereby controlling the antenna's coverage area to suit various communication modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the radio wave sensitivity is changed in a communication-related module such as a reception circuit, then the radio wave sensitivity can be adjusted for different usage scenarios, but the control mechanism of the module becomes complicated

Engineering Contradiction:

Improveradio wave sensitivity adjustmentVSAvoidcontrol mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the electronic control mechanism (switching between different reception circuits with different sensitivities) with a mechanical system - a rotating member with shielding parts that physically blocks radio waves. This mechanical approach simplifies the overall control mechanism while achieving the same sensitivity adjustment effect.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The rotating member acts as an intermediary between the antenna and the radio waves. By introducing this intermediate mechanical component, the patent avoids the need for complex electronic control of the reception circuits, as the intermediary mechanically adjusts the radio wave reception at the antenna level.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a main electronic device transmits radio waves with long wavelength for Bluetooth communication, then the radio waves are not blocked by obstacles and communication range is extended, but the main electronic device easily causes interference with unintended electronic devices

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidinterference with unintended devices

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent makes the radio wave transmission dynamic by allowing the user to rotate the rotating member to adjust the shielding configuration. This enables the device to adaptively change its transmission characteristics based on the communication scenario, reducing interference when not needed while maintaining communication reliability when required.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the physical parameter of radio wave transmission by using the rotating member to alter the effective transmission pattern and intensity. By rotating the shielding parts, the device dynamically modifies transmission parameters to reduce interference with unintended devices while maintaining reliable communication with intended devices.

Inventive Principle:

Principle #35Parameter changes

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 device allows for simple and effective adjustment of radio wave sensitivity, reducing interference and power consumption, enabling reliable pairing and data transmission while minimizing the need for additional components, thus enhancing device miniaturization and reducing manufacturing costs.

Implementation Method 1

a shielding part which shields a radio wave

Methodology Applied

Scientific EffectRadio wave shielding: Absorption (EM radiation)

Implementation Method 2

a penetration part which allows penetration of a radio wave

Methodology Applied

Scientific EffectRadio wave penetration:

Data Source

PatentUS8902716B2Sensitivity adjustment device, radio wave communication device and watch

Publication Date: 2014.12.02 CASIO COMPUTER CO LTD

AI summary

A sensitivity adjustment device adjusts radio wave sensitivity of an antenna which wirelessly transmits/receives a signal to/from an external device. The sensitivity adjustment device includes a case and a ring-shaped rotating member. The case houses the antenna. The rotating member is disposed on the outside of the case in such a way as to be rotatable. The rotating member includes (a) a shielding part which shields a radio wave and (b) a penetration part which allows penetration of a radio wave. A positional relationship between (a) the antenna and (b) the shielding part and the penetration part is changed by rotation of the rotating member so that the radio wave sensitivity of the antenna is adjusted.