JP-2026074771-A - Vehicle pedestrian protection device

Abstract

[Problem] To provide a vehicle pedestrian protection device that can mitigate the impact a pedestrian receives from a vehicle as a secondary collision when the vehicle collides with the pedestrian. [Solution] A pedestrian protection device for a vehicle, comprising a hood 12 covering the upper surface of the front of the vehicle body, and a first displacement mechanism 20 and a second displacement mechanism 40, respectively, which raise the front and rear ends of the hood when the hood is pressed upward by actuators 16 and 17, wherein the first displacement mechanism comprises an arm member 22 having an engaging portion 22b at its front end that engages with the hood and its rear end pivotally supported on the vehicle body side, and a pin 28 attached to the rear of the engaging portion and fixing the arm member to the hood, wherein when the actuator is operated, the pin separates from the arm member as the hood rises, and the arm member rotates while maintaining the engaged state by the engaging portion. [Selection Diagram] Figure 3

Inventors

• 石本 晃浩

Assignees

• 株式会社SUBARU

Dates

Publication Date

20260507

Application Date

20241021

Claims (5)

1. A hood that covers the upper front surface of the vehicle, When a collision with a pedestrian is detected or predicted and the hood is pressed upward by an actuator, a first displacement mechanism and a second displacement mechanism each raise the front and rear ends of the hood, respectively. In a vehicle pedestrian protection device equipped with, The first displacement mechanism and the second displacement mechanism are configured to allow the hood to be displaced upward and rearward from the vehicle body. The first displacement mechanism is, An arm member is positioned on the interior side of the hood, extending in the longitudinal direction of the vehicle body, having an engaging portion at its front end that engages with the hood, and its rear end pivotally supported on the vehicle body side. The arm member is attached to the rear side of the engagement portion and includes a pin that secures the arm member to the hood, A vehicle pedestrian protection device wherein, when the actuator is activated, the pin separates from the arm member as the hood rises, and the arm member rotates while maintaining the engaged state by the engaging portion.
2. The actuator comprises a front actuator that pushes up the front end of the hood and a rear actuator that pushes up the rear end of the hood. The pedestrian protection device for a vehicle according to claim 1, wherein the front actuator operates after the rear actuator has been operated.
3. The pedestrian protection device for a vehicle according to claim 2, wherein the front actuator is positioned in the area in front of the vehicle body relative to the position of the pin.
4. The pedestrian protection device for a vehicle according to claim 1 or 2, wherein the first displacement mechanism includes a latch engagement portion that engages with a latch member provided on the vehicle body to maintain the front end of the hood in a closed state, and disengages from the latch member when the hood is normally opened.
5. The vehicle pedestrian protection device according to claim 4, wherein the latch engagement portion is provided rearward of the arm member.

Description

This invention relates to a pedestrian protection device for vehicles, and more particularly to a pedestrian protection device for vehicles that mitigates the impact on pedestrians by raising a hood provided on the front of the vehicle body. When a pedestrian collides head-on with a moving vehicle, the pedestrian may first hit the front bumper at the front of the vehicle, and then their head may strike the hood that covers the engine compartment at the front of the vehicle. A head striking the hood at high speed will result in a significant impact force. Therefore, pedestrian protection devices have been developed to mitigate the impact by raising the hood and reducing the speed at which the pedestrian's head strikes it. For example, Patent Document 1 describes a pedestrian protection device comprising a front-end actuator that lifts the front end of the hood with a rod member positioned at the front end when a vehicle collides with a pedestrian, and a rear-end actuator that lifts the rear end of the hood with a rod member positioned at the rear end. In this device, by lifting both the front and rear ends of the hood during a collision, the speed at which a pedestrian's head hits the hood can be reduced on both the front and rear sides of the hood if the pedestrian falls onto the hood due to the collision. Japanese Patent Publication No. 2015-151115 This is a perspective view of a vehicle showing the pedestrian protection device for vehicles according to one embodiment of the present invention in an activated state.This is a plan view showing the overall configuration of a vehicle-mounted pedestrian protection device.This diagram schematically illustrates the first and second displacement mechanisms.This is a perspective view of the latch component.This is a perspective view of the bracket component.This is a perspective view of the arm component.This diagram schematically illustrates the operation of a vehicle-mounted pedestrian protection device.This diagram schematically illustrates the operation of a vehicle-mounted pedestrian protection device.This diagram schematically illustrates the operation of a vehicle-mounted pedestrian protection device.This diagram schematically illustrates the operation of a vehicle-mounted pedestrian protection device.This diagram schematically illustrates the opening operation of the hood under normal conditions.This diagram schematically illustrates the opening operation of the hood under normal conditions.This diagram schematically illustrates the opening operation of the hood under normal conditions.This diagram schematically illustrates the closing operation of the hood under normal conditions.This diagram schematically illustrates the closing operation of the hood under normal conditions.This diagram schematically illustrates the closing operation of the hood under normal conditions.This diagram schematically illustrates the closing operation of the hood under normal conditions. Figure 1 is a perspective view of a vehicle 1 equipped with a pedestrian protection device 10 according to one embodiment of the present invention, showing the pedestrian protection device 10 in an activated state. Figure 2 is a plan view showing the overall configuration of the pedestrian protection device 10, and Figure 3 is a schematic diagram illustrating the first displacement mechanism 20 and the second displacement mechanism 40 of the pedestrian protection device 10. The vehicle 1 comprises a vehicle body 2 and a hood 12 that covers the upper front surface of the vehicle body 2. The vehicle body 2 has an engine room at the front where rigid components such as the engine are housed, and the hood 12 covers the engine room from above. The pedestrian protection device 10 is installed at the front of the vehicle 1 and, in the event of a collision with a pedestrian, lifts the hood 12 installed at the front of the vehicle body to mitigate the impact received by the pedestrian from the vehicle 1. In the following description, the state in which the pedestrian protection device 10 is not activated in the vehicle 1 is referred to as the normal state. As shown in Figures 2 and 3, the vehicle pedestrian protection device 10 of this embodiment comprises a hood 12, a collision detection sensor 14, a collision prediction sensor (not shown), actuators 16 and 17 attached to the vehicle body 2 that press the hood 12 upward, and a control unit 18. The control unit 18 operates the actuators 16 and 17 based on signals output from the collision detection sensor 14 or the collision prediction sensor. In this embodiment, the actuators 16 and 17 comprise a front actuator 16 that presses the front end of the hood 12 upward, and a rear actuator 17 that presses the rear end of the hood 12 upward. The vehicle pedestrian protection device 10 further comprises a first displacement mechanism 20 and a second displacement mechanism 40 that can displace the hood 12 upward and rearward relative to the vehicle body 2 when t