Input Device Side-Face Vibration for Noise Reduction
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Solution Overview
Problem
Input devices that provide vibration feedback generate noise due to air vibration when the operation panel member vibrates in a direction parallel to the operation surface, which is particularly problematic in quiet environments, such as electric vehicles.
Innovation Solution
An input device design where a support member contacts the side face of the operation panel member perpendicular to the operation surface and vibrates in a direction parallel to the surface, reducing bending and noise by transmitting vibration from the side face to the operation panel member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation panel member vibrates in a direction parallel to the operation surface to provide vibration feedback, then the operator receives tactile feedback, but noise is generated due to air vibration around the operation surface
Solution Approach 1:
The patent introduces a support member as an intermediary between the actuator and the operation panel member. The support member contacts the operation panel member at its side face and transmits vibration from the actuator to the operation panel member through this side face contact point, thereby mediating the vibration transmission while reducing direct air vibration and noise generation
Solution Approach 2:
The patent changes the dimension of vibration transmission by contacting the operation panel member at its side face (perpendicular dimension) rather than at the operation surface (parallel dimension). This dimensional change allows vibration feedback to be transmitted while minimizing air vibration and noise around the operation surface
2Ease of operation
If the operation panel member vibrates in a direction perpendicular to the operation surface, then more vibration feedback is provided, but significantly more noise is generated due to air vibration
Solution Approach 1:
The patent transitions from perpendicular vibration (causing high noise) to parallel vibration by changing the contact dimension to the side face. This dimensional change enables vibration feedback while dramatically reducing noise generation from air vibration around the operation surface
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 design significantly reduces sound generation, from 94 dB to 77 dB near the operation surface and estimated 52 dB at a distance, effectively minimizing noise caused by vibration.
Implementation Method 1
an actuator configured to vibrate the support member in a direction parallel to the operation surface. The support member contacts the operation panel member only at the side face, and the operation panel member vibrates in a direction parallel to the operation panel member by transmission of a vibration of the support member from the side face to the operation panel member
Implementation Method 2
As the operation panel member vibrates, an air around the operation surface also vibrates and a sound is generated
Data Source
AI summary
An input device includes an operation panel member with an operation surface; a support member contacting a side face of the operation panel member to support the operation panel member, the side face being perpendicular to the operation surface of the operation panel member; and an actuator configured to vibrate the support member in a direction parallel to the operation surface. The support member contacts the operation panel member only at the side face, and the operation panel member vibrates in a direction parallel to the operation surface by transmission of a vibration of the support member from the side face to the operation panel member.