Haptic Solenoid Assembly with Vibration Damping
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Solution Overview
Problem
Haptic solenoids used in vehicles for providing feedback on touchscreens often suffer from inefficiency and noise issues, especially when directly coupled to screens, due to inefficient structures and actuation mechanisms.
Innovation Solution
A haptic solenoid assembly with a stationary pole, mobile pole, and a solenoid vibration-damping system, including a guiding bushing and vibration dampers, to transmit amplified vibrations to a vibrated member while minimizing noise and rattling, featuring a plunger-receiving cavity, coil, and lever-mounting portions for effective vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a solenoid is directly coupled to a screen to provide haptic feedback, then the structure is simplified, but the efficiency is reduced and noise is generated
Solution Approach 1:
The patent introduces a lever as an intermediary component between the solenoid and the screen. The lever amplifies the solenoid's motion and transmits it to the screen, improving haptic feedback efficiency without requiring direct coupling. This resolves the contradiction by maintaining structural simplicity while enhancing performance through a mechanical advantage system.
2Ease of operation
If a lever is used to couple the solenoid with the screen, then the coupling is achieved, but noise such as rattling is generated
Solution Approach 1:
The patent employs vibration dampers made of flexible or viscoelastic materials to isolate the lever from the screen. These dampers absorb vibrations and prevent rattling noise while maintaining the mechanical coupling. This resolves the contradiction by allowing effective coupling without generating harmful noise.
3Ease of manufacture
If conventional solenoid structures are used, then the implementation is straightforward, but the haptic feedback is ineffective
Solution Approach 1:
The patent transforms the conventional linear solenoid motion into amplified lever movement, creating a dynamic mechanical advantage system. The lever pivots and rotates to magnify the solenoid's displacement, providing effective haptic feedback while maintaining straightforward implementation. This resolves the contradiction by enhancing effectiveness through dynamic motion transformation rather than complex static structures.
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 solution effectively transmits amplified vibrations to the user, reducing noise and rattling, providing a more efficient and satisfactory haptic feedback experience without compromising the displacement of the vibrated member.
Implementation Method 1
a mobile pole body at least partially received in the plunger-receiving cavity and displaceable therein when an electric current is provided to the coil
Implementation Method 2
a solenoid vibration-damping system engaged to the stationary pole and at least partially surrounding the plunger-receiving cavity
Data Source
AI summary
The present disclosure concerns a haptic solenoid assembly for transmission of amplified vibrations to a vibrated member, the haptic solenoid assembly comprising a stationary pole comprising a casing defining a plunger-receiving cavity opening out in the casing and a coil at least partially surrounding the plunger-receiving cavity; a mobile pole comprising a mobile pole body at least partially received in the plunger-receiving cavity and displaceable therein when an electric current is provided to the coil; and a lever-mounting portion protruding outwardly from the plunger-receiving cavity and engageable to the vibrated member; and a solenoid vibration-damping system engaged to the stationary pole and at least partially surrounding the plunger-receiving cavity. The present disclosure also concerns a haptic solenoid system comprising a haptic solenoid assembly and a vibration-transmitting member connected to the lever-mounting end portion of the mobile pole and engageable to the vibrated member.