Anchor pretensioner for vehicle

Patent metadata

Field	Value
Publication number	US-9333944-B2
Application number	US-201414561136-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Mar 5, 2014
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An anchor pretensioner for a vehicle may include a bracket installed at a vehicle body side or a seat side, a cylinder installed on a lower end portion of the bracket, and in which a microgas generator (MGG) for generating explosive pressure is embedded, a rack installed in the cylinder, and moved upward by the explosive pressure, a rotator rotatably installed on an upper end portion of the bracket, engaged with the rack through a gear portion at a lower end of the rotator, and rotated when the rack is moved upward, and a lower anchor plate coupled to an upper end of the rotator, and connected to a webbing.

First claim

What is claimed is:

1. An anchor pretensioner for a vehicle, comprising:
a bracket installed at a vehicle body side or a seat side;
a cylinder installed on a lower end portion of the bracket, and in which a microgas generator (MGG) for generating explosive pressure is embedded;
a rack installed in the cylinder, and moved upward by the explosive pressure;
a rotator rotatably installed on an upper end portion of the bracket, engaged with the rack through a gear portion at a lower end of the rotator, and rotated when the rack is moved upward; and
a lower anchor plate coupled to an upper end of the rotator, and connected to a webbing.

2. The anchor pretensioner of claim 1 , wherein the cylinder including the rack is installed in a vertical direction and the rotator is rotated while being tilted downward from the vertical direction when the rack is moved upward.

3. The anchor pretensioner of claim 1 , further including a stopper formed on the bracket, wherein the stopper is perpendicularly bent from a bracket body, and serves to guide the rack while supporting a back surface of the rack when the rack is moved, and prevents the rack from deviating from the cylinder.

4. The anchor pretensioner of claim 1 , wherein a locking ball is interposed in a lower end portion of the rack and prevents reverse direction movement of the rack engaged with the rotator.

5. The anchor pretensioner of claim 4 , wherein the locking ball, which prevents the reverse direction movement of the rack, is interposed between a tapered surface formed on a piston portion at a lower end of the rack and the cylinder when the rack is moved downward so as to prevent the reverse direction movement of the rack.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Ahn Taeg Young
• Kim Beom Jung
• Kim Eung Joo

Classifications

• B60R2022/1806

  for buckles · CPC title

• B60R22/4628 Primary

  characterised by fluid actuators, e.g. pyrotechnic gas generators (actuating a cable B60R22/4619) · CPC title

• B60R22/1951 Primary

  characterised by arrangements in vehicle or relative to seat belt · CPC title

• B60R22/1955

  Linear actuators · CPC title

• B60R22/4652 Primary

  Mechanical triggering means therefor (also adapted for air bag inflators B60R21/33) · CPC title