Tactile Device Resonance Frequency Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tactile-sensation providing devices experience significant vibration transmission to the base part due to the direct attachment of vibrating elements, which can lead to unwanted resonance and reduced effectiveness in providing tactile sensations.
Innovation Solution
The device employs a vibrating body and a vibration-target object connected via elastic elements, with a base part spaced apart from the vibrating body, where the resonance frequency of the first vibrating system is set to ⅔ or less of the second vibrating system, utilizing rubber members and an actuator to minimize vibration transmission to the base while allowing sufficient vibration of the target object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the vibrating element is directly attached to the touch panel and housing using double-sided tape, then the tactile sensation is easily transmitted, but the vibration is easily transmitted to the base part causing unwanted resonance
Solution Approach 1:
The patent introduces a resonance frequency adjustment mechanism as an intermediary element between the vibrating element and the base part. This mechanism includes a resonance frequency adjustment member and associated springs that mediate the vibration transmission, allowing the system to selectively transmit vibrations at desired frequencies while blocking unwanted vibrations at the resonance frequency of the base part.
Solution Approach 2:
The patent changes the resonance frequency parameter of the vibration transmission path by adjusting the spring constant and mass parameters of the resonance frequency adjustment mechanism. By tuning these parameters, the system shifts the resonance frequency of the first vibrating system to be 2/3 or less of the second vibrating system, thereby avoiding resonance with the base part while maintaining tactile sensation transmission.
2Stability of the object's composition
If the base part is closely connected to the vibrating body for structural stability, then the device is more stable, but vibration transmission to the base part increases causing resonance
Solution Approach 1:
The patent segments the connection path between the vibrating body and the base part by introducing a resonance frequency adjustment mechanism as a separate, controllable element. This segmentation allows the structural connection to be optimized for stability while the resonance frequency adjustment mechanism independently manages vibration transmission, preventing resonance by tuning the first vibrating system's frequency to be 2/3 or less of the second vibrating system's frequency.
3Productivity
If the resonance frequency of the first vibrating system is increased to match the second vibrating system, then vibration transmission is maximized, but unwanted resonance occurs in the base part
Solution Approach 1:
The patent converts the potentially harmful resonance phenomenon into a beneficial filtering mechanism. By deliberately designing the first vibrating system to have a resonance frequency that is 2/3 or less of the second vibrating system, the system uses resonance in a controlled manner to block unwanted vibrations at the base part's resonance frequency while allowing desired tactile sensations to pass through, effectively turning resonance from a harmful effect into a useful vibration filtering function.
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 configuration effectively reduces vibration transmission to the base part, enhancing the tactile sensation experience by aligning the resonance frequencies and using elastic connections to manage vibration effectively.
Implementation Method 1
a vibration-target object (12) that is elastically connected with the vibrating body (21)
Implementation Method 2
a resonance frequency of a first vibrating system including the base part (11) and the vibration-target object (12) is 2/3 or less of a resonance frequency of a second vibrating system including the vibration-target object (12) and the vibrating body (21)
Data Source
AI summary
The present invention provides a tactile-sensation providing device that reduces the transmission of vibration to the base part. The tactile-sensation providing device has: a vibrating body; a vibration-target object that is elastically connected with the vibrating body and vibrated in accordance with vibration of the vibrating body; and a base part that is elastically connected with the vibration-target object, the tactile-sensation providing device providing a tactile sensation to a living body based on vibration of the vibration-target object, the base part is spaced apart from the vibrating body, and a resonance frequency of a first vibrating system including the base part and the vibration-target object is ⅔ or less of a resonance frequency of a second vibrating system including the vibration-target object and the vibrating body.