Vibration power generation element

By optimizing the meshing length and electrostatic attraction of comb-shaped electrodes in vibration power generation elements, parasitic capacitance is reduced, enhancing the frequency band and efficiency of power generation.

JP2026110090APending Publication Date: 2026-07-02SAGINOMIYA SEISAKUSHO INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
SAGINOMIYA SEISAKUSHO INC
Filing Date
2024-12-20
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Conventional vibration power generation elements suffer from significant parasitic capacitance, leading to reduced output when the environmental vibration deviates from the resonance frequency, limiting the frequency band in which power can be generated.

Method used

The vibration power generation element is designed with a configuration that reduces parasitic capacitance by adjusting the meshing length of comb-shaped electrodes and utilizing an elastic support portion to manage the distance between electrodes, either by ensuring no overlap or minimal overlap in the uncharged state and allowing electrostatic attraction to achieve overlap when charged.

Benefits of technology

This configuration effectively reduces parasitic capacitance, expanding the frequency band for power generation and maintaining resonance, thereby maximizing output and improving power generation efficiency.

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Abstract

The present invention provides a vibration power generation element that can sufficiently reduce the parasitic capacitance that may occur in the element, thereby expanding the frequency band over which power can be generated. [Solution] The vibration power generation element 20 includes a fixed electrode 22 having a plurality of comb-shaped electrodes, a movable electrode 21 having a plurality of comb-shaped electrodes that mesh with the comb teeth of the fixed electrode, and elastic support parts 16a, 16b that move the movable electrode relative to the fixed electrode in a predetermined direction on the same plane. When at least one of the fixed electrode and the movable electrode is charged, the meshing length of the fixed electrode and the movable electrode is the same as the amount of deflection of the elastic support part, or the meshing length of the fixed electrode and the movable electrode is smaller than the amount of deflection of the elastic support part.
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