PRESSURE SENSITIVE ELEMENT

• Main Authors: OGURA TETSUYOSHI, SAWADA YUI, NOINE KEIJI, MASUDA SHINOBU, MORIURA YUTA
• Format: Patent
• Language: English; Japanese
• Published: 17.06.2021
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

To provide a pressure sensitive element having a relatively wide measurement range of pressing force and a relatively simple structure.SOLUTION: A pressure sensitive element includes a pressure sensitive unit (1A) to which pressing force is applied and a detector (2A) for detecting pressing force. The pressure sensitive unit (1A) includes: a first conductive member (11) made of sheet-like conductive rubber; a dielectric (13) formed on one surface of the first conductive member (11); and a second dielectric (12) that is arranged under the dielectric (13) and made of a metal wire and whose cross-section is a cylindrical shape. When pressure is applied to the pressure sensitive unit (1A), the area of a contact region between the dielectric (13) and the second conductive member (12) increases, resulting in change in capacitance. The detector (2A) detects pressing force based on the change in capacitance.SELECTED DRAWING: Figure 4 【課題】押圧力の測定範囲が比較的広く、かつ構造が比較的簡易な感圧素子を提供すること。【解決手段】押圧力を付与される感圧部（１Ａ）と押圧力を検出する検出器（２Ａ）とを備えた感圧素子であって、感圧部（１Ａ）は、シート状の導電性ゴムから成る第１の導電部材（１１）と、第１の導電部材（１１）の一面に形成された誘電体（１３）と、誘電体（１３）の下に配備され、金属ワイヤから成り、断面円形状の第２の誘電体（１２）とを有し、感圧部（１Ａ）に押圧力が付与されると、誘電体（１３）と第２の導電部材（１２）との接触領域の面積が拡大することで、静電容量が変化し、検出器（２Ａ）は、静電容量の変化に基づいて、押圧力を検出する。【選択図】図４