Waterproof Trigger Mechanism for Mobile Device Security Buzzer

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Solution Overview

Problem

Existing mobile devices face challenges in incorporating a waterproof security buzzer within a small space while maintaining functionality.

Innovation Solution

A mobile device design featuring a rod-like trigger, a taperingly formed housing with a sealing member and a firmly fitted member that allows the trigger to be freely slid, ensuring water-tight operation and repeated use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a waterproof function is incorporated in a mobile device along with a security buzzer, then water resistance is improved, but device size increases

Engineering Contradiction:
Improvewater resistanceVSAvoiddevice size
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The firmly fitted member is inserted into the first hole of the housing, and the sealing member is disposed within the first hole between the step and the firmly fitted member. This nested arrangement integrates multiple components (housing, firmly fitted member, sealing member) into a compact structure that provides waterproof functionality without significantly increasing device volume

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The sealing member (such as an O-ring) provides a flexible waterproof barrier that can be integrated into the existing device structure. This thin film approach achieves water resistance without requiring bulky waterproof compartments, thus maintaining compact device size

Inventive Principle:
Principle #30Flexible shells and thin films

2Adaptability or versatility

If a security buzzer is integrated into a mobile device, then functionality is improved, but ease of operation deteriorates due to space constraints

Engineering Contradiction:
ImprovefunctionalityVSAvoidtrigger operation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The rod-like body is designed to be freely slidable within the firmly fitted member, allowing dynamic operation of the trigger. This sliding mechanism enables easy activation and deactivation of the security buzzer function without requiring complex mechanical structures, maintaining ease of operation despite integrated functionality

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS8238969B2Mobile device
Publication Date: 2012.08.07 FCNT LLC
  • US8238969B2 patent drawing
  • US8238969B2 patent drawing
  • US8238969B2 patent drawing

AI summary

A mobile device includes a trigger having a rod-like body fixed at one end. A housing has a first hole into which the body is inserted. A sensor detects that the trigger has been operated in the direction in which the body is pulled from the hole. A buzzer is activated in response to the sensor's having detected the operation of the trigger. A second hole is formed in a firmly fitted member. The body is inserted in the second hole so as to be freely slid forward or backward against the hole. The fitted member is fitted firmly in the entrance portion of the first hole; and a sealing member contacts the internal wall of the first hole and the body.