Mechanism for adjusting the back portion of a seat
First Claim
1. An adjusting mechanism for a back portion of a seat, said mechanism comprising:
- a shaft;
a cam mounted on said shaft, said cam having three steps with elongations and a recessed section between said steps and said elongations;
a circular fixed flange having a cup-shaped recess of a first diameter, three cutouts, three cutout portions, and a circular recess of a second diameter greater than said first diameter, said cutouts being spaced at an angle of 120°
from one another and said three cutout portions being spaced at an angle of 120°
from one another, said three cutout portions being staggered relative to said cutouts, said circular fixed flange having a central opening for receiving said shaft;
a circular mobile flange connected to said circular recess and having a stepped recess;
a block being disposed in each said cutouts and having a radially outwardly oriented toothing;
a block-pushing member coordinated with said block and resting with a radially outwardly oriented face at said block and with a radially inwardly oriented face at said cam, said block-pushing member having a finger axially facing said circular mobile flange;
three torsion springs in the form of a figure eight, with a free end of each said spring being positioned in a respective one of said cutout portions of said circular fixed flange, each said elongations of said cam resting at one of said springs; and
a release ring connected to said circular mobile flange, having three radially inwardly oriented projections cooperating with said fingers for forcing said block-pushing members radially inwardly when said cam is turned against the force of said springs.
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Accused Products
Abstract
An adjusting mechanism for the back portion of a seat comprises a fixed circular flange attached to an armature of the sitting portion of the seat. The fixed flange has a cup-shaped recess and cutouts spaced at 120° from one another. Each cutout contains a block with an outer toothing. The blocks are resting on block-pushing members each provided with a finger facing the mobile flange. The block-pushing members rest on a cam with three steps. The fingers of the block-pushing members cooperate with a release ring housed inside the mobile flange and having three projections provided for pushing the block-pushing members toward the center of the adjusting mechanism when the cam is pivoted in a direction for moving the back portion of the seat onto the sitting portion.
44 Citations
5 Claims
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1. An adjusting mechanism for a back portion of a seat, said mechanism comprising:
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a shaft; a cam mounted on said shaft, said cam having three steps with elongations and a recessed section between said steps and said elongations; a circular fixed flange having a cup-shaped recess of a first diameter, three cutouts, three cutout portions, and a circular recess of a second diameter greater than said first diameter, said cutouts being spaced at an angle of 120°
from one another and said three cutout portions being spaced at an angle of 120°
from one another, said three cutout portions being staggered relative to said cutouts, said circular fixed flange having a central opening for receiving said shaft;a circular mobile flange connected to said circular recess and having a stepped recess; a block being disposed in each said cutouts and having a radially outwardly oriented toothing; a block-pushing member coordinated with said block and resting with a radially outwardly oriented face at said block and with a radially inwardly oriented face at said cam, said block-pushing member having a finger axially facing said circular mobile flange; three torsion springs in the form of a figure eight, with a free end of each said spring being positioned in a respective one of said cutout portions of said circular fixed flange, each said elongations of said cam resting at one of said springs; and a release ring connected to said circular mobile flange, having three radially inwardly oriented projections cooperating with said fingers for forcing said block-pushing members radially inwardly when said cam is turned against the force of said springs. - View Dependent Claims (2, 3, 4, 5)
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Specification