Vibration Actuator Contact Body Damping for Compact Power Output
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Solution Overview
Problem
Existing vibration actuators face challenges in maximizing output power per volume or weight due to unnecessary vibrations and space inefficiency, primarily because they require a second base member and vibration-absorbing components that limit frictional sliding surfaces.
Innovation Solution
The vibration actuator incorporates a vibration-damping member on a surface of the contact body distinct from the contact surface, allowing for relative movement between the vibration body and contact body while suppressing unnecessary vibrations, thereby enhancing space efficiency and output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration-absorbing member is provided between the relative movement member and the second base member, then vibration is absorbed, but the surface area available for frictional sliding is limited
Solution Approach 1:
The invention extracts the vibration-absorbing function from a separate component (vibration-absorbing member between relative movement member and second base member) and integrates it directly into the frictional sliding surface of the relative movement member itself. This allows the same surface to simultaneously provide frictional drive and vibration absorption without sacrificing sliding area
Solution Approach 2:
The invention merges the frictional sliding surface and vibration-absorbing member into a single integrated component. The frictional sliding surface is configured to directly contact and absorb vibrations from the vibration body, eliminating the need for a separate vibration-absorbing member and maximizing the usable sliding surface area
2Object-affected harmful factors
If a second base member is provided to support the vibration-absorbing member, then vibration is absorbed, but the size of the vibration motor increases
Solution Approach 1:
The invention merges the second base member and vibration-absorbing member functions into a single integrated frictional sliding surface. This eliminates the need for a separate second base member, reducing the overall volume of the vibration motor while maintaining vibration absorption capability
Solution Approach 2:
The frictional sliding surface is designed to perform multiple functions simultaneously: providing frictional drive for motion transmission and absorbing vibrations. This multi-functionality eliminates the need for separate components, reducing the overall motor size
3Object-affected harmful factors
If the vibration-absorbing member is affixed to the frictional sliding surface, then vibration is absorbed, but the surface cannot be used for driving
Solution Approach 1:
The invention extracts the vibration-absorbing property and applies it directly to the frictional sliding surface material itself rather than adding a separate layer that would interfere with driving. The frictional sliding surface is configured to inherently absorb vibrations while maintaining its driving function
Solution Approach 2:
The invention merges the vibration-absorbing member with the frictional sliding surface into a single integrated component. This allows the same surface area to simultaneously provide both frictional drive and vibration absorption, maximizing output power per volume by eliminating wasted surface area
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 unnecessary vibrations, preventing a decrease in output power per volume or weight, and allows for more compact designs by optimizing the use of space and frictional surfaces.
Implementation Method 1
A vibration-damping member is provided on a predetermined surface of the contact body that is different from a contact surface that contacts the vibration body
Implementation Method 2
a vibration body (1) including an elastic body (2) and an electric-mechanical energy conversion element (3) joined to the elastic body (2)
Implementation Method 3
The vibration body (1) and the contact body (4) move relative to each other in a predetermined direction (y-direction)
Data Source
AI summary
A vibration actuator includes: a vibration body 1 including an elastic body 2 and an electric-mechanical energy conversion element 3 joined to the elastic body 2; and a contact body 4 that contacts the vibration body 1. The vibration body 1 and the contact body 4 move relative to each other in a predetermined direction. A vibration-damping member 25 is provided on a predetermined surface of the contact body 4 that is different from a contact surface that contacts the vibration body 1. The vibration-damping member 25 is constituted by a viscoelastic body or by combining the viscoelastic body and a reinforcement member.