Patent ID: 7868748

Claim:
A collision detection sensor for detecting a collision of a vehicle with an object, the collision detection sensor comprising: a bumper reinforcement extending in a vehicle left-right direction; a bumper cover located to cover space ahead of the bumper reinforcement in a vehicle front-rear direction, the bumper cover being configured to move toward a vehicle rear direction relative to the bumper reinforcement in the event of the collision; a chamber member defining a chamber room therein and located between the bumper reinforcement and the bumper cover, the chamber room being deformed with the relative movement of the bumper cover to the bumper reinforcement; a movable member configured to move with the relative movement of the bumper cover to the bumper reinforcement; a pressure sensor configured to detect a pressure change in the chamber room; a touch sensor located ahead of the bumper reinforcement in the vehicle front-rear direction and detecting contact with the movable member, the touch sensor and the chamber room being located at different positions in a vehicle top-bottom direction; and a determination circuit that determines whether the collision occurs based on the detection results of the pressure sensor and the touch sensor, wherein the chamber member includes a body portion and an extension portion integrally formed with the body portion, the body portion defining the chamber room, the extension portion extending outward from an outer surface of the body portion, and wherein the touch sensor is mounted to the extension portion.