Tension release device with reduced door closing resistance

Details Tension release device with reduced door closing resistance Tension release device with reduced door closing resistance

1982-07-06

1984-01-31

Mitchell, David M.

Land vehicles

Wheeled

Attachment

2421076, 280807, A62B 3502

Patent

active

044286007

ABSTRACT:
In a seat belt retractor having a rewind spring and a tension relieving mechanism for removing spring tension from the belt worn by the user, a device for releasing the tension relieving mechanism to allow for belt retraction exerting a resistance to door closing which decreases from initial door-release device contact through full door closure. The release device includes a door-actuated lever, which pivots between a release position engaging the tension relieving mechanism and a non-release position, and a spring that biases the lever to its release position when the door is opened. The spring, having tension directed through its longitudinal axis is connected at one end to the lever outward of its pivotal axis and pivotably connected at the other end to the retractor frame at a location eccentric to the pivotal axis of the lever. As the lever is pivoted by the closing door from its release to its non-release position, the spring shifts about the frame location as increased tension is applied along the longitudinal axis of the spring but with the longitudinal axis of the spring shifting towards a perpendicular to the direction of door closing so that the moment of force of the spring in opposition to door closing decreases.

REFERENCES:
patent: 3957223 (1976-05-01), Colasanti et al.
patent: 4065072 (1977-12-01), Magyar
patent: 4198011 (1980-04-01), Kamijo et al.
patent: 4206888 (1980-06-01), Magyar
patent: 4295684 (1981-10-01), Naitoh

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