PINCHING DETECTION DEVICE AND OPENING/CLOSING SYSTEM

To provide a pinching detection device which can detect pinching with a good accuracy with a simple and inexpensive configuration.SOLUTION: A pinching detection device has: a sensor electrode 51 which is provided on a peripheral edge part of a door opening; a position detection electrode 52 which is provided on a back door, and in which a distance between itself and the sensor electrode 51 becomes shorter as the back door is gradually closed toward a vehicle body; and a detection part 53 which detects a change in an electrostatic capacity formed in the sensor electrode 51 in order to detect pinching of an obstacle. In this case, the position detection electrode 52 charges the electrostatic capacity formed in the sensor electrode 51 with an amount of charge according to a distance between itself and the sensor electrode 51.SELECTED DRAWING: Figure 3 【課題】簡素かつ安価な構成で挟み込みを精度よく検知することができる挟み込み検知装置を提供する。【解決手段】挟み込み検知装置は、ドア開口部の周縁部に設けられるセンサ電極５１と、バックドアに設けられ、バックドアが車体に向けて閉じられるほどセンサ電極５１との距離が小さくなる位置検知電極５２と、障害物の挟み込みを検知するために、センサ電極５１に形成される静電容量の変化を検知する検知部５３と、を有している。この場合、位置検知電極５２は、センサ電極５１との距離に応じた充電量で、センサ電極５１に形成される静電容量を充電する。【選択図】図３