Knee bolster device for vehicle
A knee bolster device for a vehicle is intended to enhance passenger safety performance by minimizing injury to passengers when a collision occurs. The knee bolster device is capable of preventing injury to passengers striking a lower crash pad panel and penetrating into an inner space of the lower crash pad panel because the lower crash pad panel is reinforced by a composite material and an impact energy absorbing structure installed in the inner space of the lower crash pad panel.
1. A knee bolster device for a vehicle, comprising:
a left support bracket which is installed on one side end of left and right side ends of a vehicle body structure placed behind a lower crash pad panel configured to be struck by knees of a passenger when a collision occurs; and
a shock absorbing foam which is installed so as to be supported by a right support bracket installed on the vehicle body structure at a right side of the left support bracket,
wherein a lower portion of the lower crash pad panel is provided with a composite material integrally formed with the lower crash pad panel to reinforce strength, the composite material being arranged at a zone between the left support bracket and the shock absorbing foam, and
wherein the right support bracket is bent so that an upper side of the right support bracket is open, and is disposed on a lower portion of the vehicle body structure; a front portion of one end of the right support bracket is joined to the vehicle body structure and a rear portion of the one end is installed to the vehicle body structure without being joined to the vehicle body structure; and the rear portion is fastened to a rear support bracket coupled to the vehicle body structure so that the rear portion of the right support bracket is supported.
2. The knee bolster device of claim 1 , wherein the front portion of the right support bracket is provided with foam guides formed to protrude toward the lower crash pad panel to guide assembly position of the shock absorbing foam and simultaneously prevent abnormal deformation of the shock absorbing foam when a vehicle collision occurs.
3. The knee bolster device of claim 1 , wherein the composite material is a continuous fiber reinforced thermal plastic (CFT).
4. The knee bolster device of claim 1 , wherein when the lower crash pad panel is injection molded, injection base material is coated up to a top end of a flange bent at an edge of the composite material, so that the top end of the flange is coated with the injection base material.
5. The knee bolster device of claim 1 , wherein the left support bracket is bent so that an upper side of the left support bracket is open, a front portion of one end of the left support bracket is fastened to a main crash pad panel disposed to be fixed to an upper side of the lower crash pad panel, and a rear portion of the other end is joined to the vehicle body structure.
6. The knee bolster device of claim 5 , wherein the rear portion of the left support bracket is provided with one or more curved portions formed in a shape of being bent and convex for inducing deformation when the left support bracket is struck.
7. The knee bolster device of claim 1 , wherein opposite edge portions of the left support bracket are provided with stepped portions that are bent to have a height difference compared to a central portion based on a width direction of the left support bracket so as to reinforce strength.