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1. US20050284977 - Seat belt retractor with electric motor

Office
United States of America
Application Number 11147852
Application Date 08.06.2005
Publication Number 20050284977
Publication Date 29.12.2005
Publication Kind A1
IPC
B60R 22/46
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
22Safety belts or body harnesses in vehicles
34Belt retractors, e.g. reels
46with means to tension the belt in an emergency
B60R 22/40
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
22Safety belts or body harnesses in vehicles
34Belt retractors, e.g. reels
36self-locking in an emergency
40responsive only to vehicle movement
B60R 22/34
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
22Safety belts or body harnesses in vehicles
34Belt retractors, e.g. reels
B60R 22/44
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
22Safety belts or body harnesses in vehicles
34Belt retractors, e.g. reels
44with means for reducing belt tension during use under normal conditions
Applicants Key Safety Systems, Inc.
Inventors Specht Martin
Seer Mark
Heckmayr Thomas
Kilian Thomas
Agents KEY SAFETY SYSTEMS, INC.;PATENT DEPARTMENT
Title
(EN) Seat belt retractor with electric motor
Abstract
(EN)

A retractor for a seat belt of a vehicle has a winding shaft for winding up a seat belt. A motive spring biases the winding shaft in the winding direction of the seat belt. An electric motor produces torque can be transmitted to the motive spring to change the spring force. A switch coupling transmits the torque of the electric motor to the winding shaft to wind up the seat belt. A gear transmits the torque of the electric motor to the winding shaft or the motive spring. The motive spring, the coupling and the gear are provided on one side of the seat belt retractor. The gear comprises a drive wheel which is rotatably mounted on a shaft rotationally and coaxially connected to a winding shaft, and which is rotationally connected to an outer spring end of the motive spring by a rigid rotary connection. A first active surface of the coupling is movably mounted against a restoring force on a component securely connected to the rigid rotary connection and is able to rotate around the shaft. A second active surface of the coupling is rotationally connected to the shaft.