Blocking mechanism for a seat belt retractor

US6158685A · kind A · utility

Assignee

• TRW Occupant Restraint Systems GmbH & Co. KG · DE

Inventors

• Thomas Kielwein · Mutlangen, DE
• Jurgen Rink · Schwäbisch Gmünd, DE
• Johannes Schmid · Schwäbisch Gmünd, DE

Key dates

• Filing date: Jul 13, 1999
• Grant date: Dec 12, 2000
• Expiry date: Jul 13, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R22/405
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A blocking mechanism for a seat belt retractor has a belt reel (10) rotatably mounted in a frame (12), a ratchet toothing (16) arranged on the frame, a ratchet pawl (24) arranged on the belt reel (10) for cooperation with the ratchet toothing (16) and an inertial disc (20) used as a belt webbing-sensitive sensor element. The inertial disc (20) is rotatable relative to the belt reel (10). The ratchet pawl (24) is pivotally mounted on the inertial disc (20). The belt reel (10) has an actuating element (26a) engaging the ratchet pawl (24). In operation, the actuating element (26a) causes the ratchet pawl (24) to engage with the ratchet toothing (16) when the belt reel (10) is rotated relative to the inertial disc (20).