Magnetic Vibration Actuator Structure for Thin Touch Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panel vibration actuators are bulky, costly, and lack efficient vibration feedback, making them unsuitable for modern, compact, and cost-effective applications.
Innovation Solution
A vibration actuator design featuring a magnetic suction force generation part with a coil-wound core and a movable body supported by elastic parts, allowing for efficient vibration transmission in the direction orthogonal to the actuator's thickness, reducing size and cost while enhancing tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional vibration actuator with guide shaft and movable body is used, then vibration feedback can be provided, but the device size and thickness increase
Solution Approach 1:
The patent replaces the traditional mechanical guide shaft and movable body structure with a magnetic field-based actuation system. The coil generates a magnetic field that directly acts on the magnetic material in the vibration transmission unit, eliminating the need for mechanical guide components and reducing overall actuator thickness while maintaining vibration feedback capability.
Solution Approach 2:
The patent changes the actuation mechanism from mechanical contact and guide-based movement to magnetic field interaction. By utilizing magnetic attraction and repulsion forces between the coil and magnetic material, the system achieves vibration actuation with reduced dimensional constraints, particularly in the thickness direction.
2Reliability
If complex vibration actuator structures are used, then vibration feedback can be achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces complex mechanical components (guide shaft, movable body, multiple support structures) with a simpler electromagnetic system consisting of a coil and magnetic material. This substitution reduces the number of parts, simplifies assembly, and lowers manufacturing costs while maintaining reliable vibration feedback functionality.
Solution Approach 2:
The vibration transmission unit serves multiple functions: it transmits vibration to the touch panel, provides structural support, and contains the magnetic material for actuation. This multi-functionality reduces the need for separate components, simplifying the overall structure and reducing manufacturing complexity.
3Volume of moving object
If thin vibration actuators are used, then device thickness is reduced, but vibration output efficiency decreases
Solution Approach 1:
The patent employs a composite structure where a magnetic material is integrated into the vibration transmission unit. This composite design allows the thin actuator to generate sufficient magnetic force for effective vibration output, as the magnetic material concentrates and amplifies the magnetic field interaction within the limited thickness available.
Solution Approach 2:
The patent optimizes the magnetic properties and geometric configuration of the magnetic material to maximize magnetic force density within the thin profile. By carefully selecting magnetic material properties and arranging the coil-wound core, the system achieves high vibration output efficiency despite the reduced thickness.
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 achieves cost reduction, thickness minimization, and effective vibration output suitable for touch feedback, making it suitable for modern touch panel applications.
Implementation Method 1
a magnetic suction force generation part provided in the base part, the magnetic suction force generation part including a core on which a coil is wound; The suction force is generated by energization to the coil
Implementation Method 2
a first elastic support part and a second elastic support part connected to a top end part and a bottom end part, respectively, of the movable body; the first elastic support part and the second elastic support part being configured to elastically support the movable body
Data Source
AI summary
A vibration actuator includes: a fixing body including a base part and a magnetic suction force generation part including a core on which a coil is wound; a movable body including a presentation part connecting part connectable to a vibration presentation part, and a suction part composed of a magnetic material; and a first elastic support part and a second elastic support part, the first elastic support part and the second elastic support part being configured to elastically support the movable body. A suction force of the magnetic suction force generation part is generated by energization to the coil, and a vibration along the base extending direction is applied to the vibration presentation part through the movable body.