Multi-Directional Input Assembly With Anti-Fall Clamping Joint

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Solution Overview

Problem

Existing multi-directional input devices face the issue of the operating body easily falling off due to the design, which complicates assembly and affects usability.

Innovation Solution

The design incorporates a clamping joint with a positioning piece that elastically abuts against the clamping joint, ensuring it is firmly fixed in an installation hole, and additional positioning notches and limiting portions to prevent dislodgment, along with a reset mechanism and switch mechanism for smooth operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the operating body is separated from spherical components to allow assembly into the casing opening, then the ease of manufacture is improved, but the reliability deteriorates because the operating body becomes easy to fall off

Engineering Contradiction:
Improveease of assemblyVSAvoidstability of operating body
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The operating body is divided into two separate components: the operating body proper and the spherical component. The operating body can be assembled into the casing opening first, then the spherical component is separately installed into the installation hole. This segmentation enables easier assembly while maintaining reliability through the positioning piece mechanism.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The positioning piece acts as an intermediary component between the spherical component and the installation hole. It provides elastic abutment that secures the spherical component in place, preventing the operating body from falling off while allowing for easy assembly and disassembly when needed.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the operating body is provided with a larger grip portion for manual manipulation, then the ease of operation is improved, but the device complexity increases due to the special-shaped body design

Engineering Contradiction:
Improvemanual manipulationVSAvoidstructure of operating body
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The grip portion is separated from the operating body and implemented as the spherical component. This allows the operating body to have a simpler, more standard shape that is easier to manufacture, while the spherical component provides the necessary grip surface for manual manipulation, thus reducing overall device complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The spherical component serves as an intermediary that provides the grip function without requiring the operating body itself to have a complex special-shaped design. Users can manipulate the spherical component directly, achieving ease of operation while maintaining structural simplicity.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 effectively prevents the operating body from falling off, enhances assembly stability, and improves the operational smoothness and accuracy of the input device.

Implementation Method 1

The positioning piece is elastically abutted against the clamping joint so that the clamping joint is fixed in the installation hole

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS12494331B2Multi-directional input device
Publication Date: 2025.12.09 SHENZHEN ZESUM POLYTRON TECH CO LTD
  • US12494331B2 patent drawing
  • US12494331B2 patent drawing
  • US12494331B2 patent drawing

AI summary

Disclosed is a multi-directional input device, including: a first casing provided with a first containing space with a first opening; an operating body, wherein one end of the operating body is provided with a tiltable operating portion penetrating through the first opening, and another end of the operating body extends into the first containing space and is provided with a clamping joint; a hemisphere provided with an installation hole for inserting the clamping joint; a positioning piece provided on an inner wall of the installation hole, wherein the positioning piece is elastically abutted against the clamping joint so that the clamping joint is fixed in the installation hole; a reset mechanism for returning the operating body to a neutral position; a switch mechanism for pressing and operating the switch mechanism through the operating body to realize electrical action.