Key Switch Trigger Mechanism With Vertical-to-Lateral Force Conversion

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Solution Overview

Problem

The existing key switches face synchronization issues between balance and conducting structures, leading to inaccurate and less sensitive conducting and disconnecting actions due to the lack of direct linkage between balance and conducting mechanisms.

Innovation Solution

A vertical and horizontal conversion trigger conduction mechanism is introduced, converting longitudinal pressing force into lateral force to synchronize balance and conducting actions, using a balance frame, driving rod, and conduction components to enhance accuracy and sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a balance frame structure is added to improve pressing balance, then pressing balance is improved, but synchronization between conducting and balancing actions deteriorates due to lack of direct linkage

Engineering Contradiction:

Improvepressing balanceVSAvoidsynchronization accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent merges the balance frame structure with the conducting structure by integrating the moving piece into the balance frame. The moving piece is directly connected to the balance frame components, combining the balancing function and conducting function into a single integrated structure, ensuring synchronized action between balance and conduction.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces a lateral bump as an intermediary element that transfers the vertical pressing force to the conducting structure. The lateral bump converts the vertical motion of the balance frame into lateral motion that directly actuates the conducting contacts, serving as a mediator between the balancing and conducting functions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If moving and static pieces are longitudinally arranged for direct acting, then conducting function is simple, but sensitivity and accuracy of conducting action deteriorates

Engineering Contradiction:

Improveconducting structure simplicityVSAvoidconducting action accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent changes the dimension of force transmission by converting vertical force into lateral force through the lateral bump. Instead of direct longitudinal arrangement where vertical force acts directly on conducting contacts, the force is redirected to the lateral dimension, improving sensitivity and accuracy of the conducting action.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If balance frame and conducting structures are separate, then each structure can play its role independently, but synchronization between conducting and balancing actions deteriorates

Engineering Contradiction:

Improveindependent function capabilityVSAvoidaction synchronization

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent combines the balance frame and conducting structures into an integrated assembly where the moving piece serves both balancing and conducting functions simultaneously, ensuring synchronized operation while maintaining independent functional capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The lateral bump is pre-positioned on the moving piece to ensure that as soon as vertical motion occurs during pressing, the lateral force is immediately transmitted to the conducting contacts, achieving automatic synchronization without additional linkage mechanisms.

Inventive Principle:

Principle #10Preliminary action

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 mechanism achieves high-accuracy and sensitive connection and disconnection functions by converting longitudinal to lateral forces, improving the overall performance of the key switch.

Implementation Method 1

the balance frame assembly transmits the longitudinal downward pressure to the driving rod, and then the pushing lug on the driving rod exerts a lateral force on the lateral lug of the moving plate, that is, the longitudinal force is converted into a lateral force

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

The moving plate comprises a base block and a U-shaped elastic plate arranged on the base block

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20260031288A1Vertical and Horizontal Switching Trigger Conduction Mechanism Applied to Key Switch

Publication Date: 2026.01.29 DONGGUAN CITY KAIHUA ELECTRONICS

AI summary

A longitudinal and transverse conversion type connection trigger mechanism applied to a key switch, the connection trigger mechanism comprising a base (1), a balance frame assembly (2) arranged on the base (1), a connection assembly (3), and a drive rod (4), which is driven by the balance frame assembly (2) and triggers the connection assembly (3) to connect and disconnect. By means of converting a longitudinal acting force into a transverse acting force when producing a pressing balance effect, the longitudinal and transverse conversion type connection trigger mechanism applied to a key switch triggers the movable piece (32) to be connected to and disconnected from the static piece (31), such that the accuracy of switch-on and -off actions and the sensitivity of the key switch when the key switch is switched on and off are improved.