Linear-Shaft Haptic Suspension for Uniform Axial Vibration
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Solution Overview
Problem
Traditional suspension structures in haptic feedback devices fail to maintain uniform vibration sensation distribution and are affected by external pressures, limiting their practicality and application scenarios.
Innovation Solution
A haptic feedback device with a suspension assembly and fixing assembly, utilizing metal linear shafts and bearing members to allow reciprocal movement along a single axial direction, ensuring uniform vibration sensation and minimizing vibration transmission to the fixing assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional suspension structures use metal shrapnel or flexible material to connect suspension assembly and non-suspension assembly, then the structure is simple to manufacture, but the vibration sensation cannot be retained in a single direction of freedom and uniformity of vibration distribution is affected
Solution Approach 1:
The suspension assembly is segmented into distinct functional components: the housing containing the vibration source, the linear shaft providing unidirectional movement constraint, and the bearing member facilitating smooth reciprocation. This segmentation allows each component to be optimized for its specific function, ensuring uniform vibration distribution while maintaining manufacturing simplicity through modular assembly
Solution Approach 2:
The linear shaft acts as an intermediary element between the housing and the bearing member, constraining the vibration motor's movement to a single axial direction. This intermediary component transfers the vibration energy uniformly along the suspension assembly without allowing lateral movements, thereby achieving uniform vibration sensation distribution while adding minimal structural complexity
2Object-affected harmful factors
If traditional suspension structures are used, then the device complexity is low, but the suspension assembly transmits larger vibration sensation to the non-suspension assembly
Solution Approach 1:
The harmful vibration transmission is extracted and isolated by introducing the linear shaft and bearing member system. This system extracts the vibration energy and confines it to reciprocational movement along the linear shaft's axis, preventing the transmission of lateral vibrations to the non-suspension assembly. The extraction of harmful vibration components is achieved through the bearing member's contact with the linear shaft, which absorbs and directs the vibration energy
Solution Approach 2:
The vibration energy that would otherwise be harmful by transmitting to the non-suspension assembly is converted into a beneficial reciprocational movement along the linear shaft. The bearing member utilizes the vibration energy to maintain continuous contact with the linear shaft, transforming potentially harmful lateral vibrations into useful axial reciprocation that enhances the haptic feedback effect while protecting the non-suspension assembly from unwanted vibrations
3Reliability
If traditional suspension structures are used, then the manufacturing is simple, but when external pressure is applied, the resonant frequency is greatly affected and practicality is reduced
Solution Approach 1:
The suspension assembly employs dynamic elements including the linear shaft and bearing member that allow the system to adapt to external pressures. The bearing member maintains continuous contact with the linear shaft during reciprocation, creating a dynamically stable system that can adjust to varying external forces while maintaining consistent resonant frequency. This dynamic interaction between components ensures reliability under different loading conditions without requiring complex active control mechanisms
4Ease of manufacture
If metal shrapnel or flexible material is used for suspension structure, then the ease of manufacture is high, but the vibration sensation uniformity deteriorates
Solution Approach 1:
The suspension assembly applies local quality by using the linear shaft and bearing member to create a localized constraint system. The linear shaft provides precise unidirectional constraint at specific contact points with the bearing member, ensuring uniform vibration distribution in the critical vibration transmission path. This localized precision constraint system can be manufactured using standard machining operations, maintaining ease of manufacture while achieving superior vibration uniformity
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 device achieves concentrated and uniform vibration sensation on the suspension assembly, maintaining intensity despite external pressures, thereby enhancing the practicality and application scope of haptic feedback.
Implementation Method 1
The vibration motor drives the suspension assembly to move reciprocally relative to the fixing assembly along an axial direction of the linear shaft
Implementation Method 2
at least one bearing member corresponding to the linear shaft mounted in the receiving space. The linear shaft is disposed passing through the bearing member
Data Source
AI summary
The present invention provides a haptic feedback device including a suspension and a fixing assembly. The suspension assembly includes a housing, at least one linear shaft, and a vibration motor. The fixing assembly includes a base enclosing a receiving space and at least one bearing member. The housing is spaced apart from the base. The linear shaft passes through the bearing member and extends beyond the bearing member. The vibration motor drives the suspension assembly to move reciprocally. The suspension assembly of the present invention can retain the vibration freedom only in a single direction, and the distribution of vibration sensation is more uniform. The vibration sensation transmitted to the fixed assembly is small, and the vibration sensation is more concentrated on the suspension assembly. When the suspension assembly is applied by an external pressure, the pressure has little effect on the vibration sensation intensity.