Headrest for motor-vehicle seats
AssigneeGestind-M.B. Manifattura di Bruzolo S.p.A.
InventorEmilio De Filippo
Life of this patent
Estimating the term…
Abstract
A headrest for motor-vehicle seats comprising a yielding body connected to a pair of supports, to be fixed to the backrest of a motor-vehicle seat, through an articulated parallelogram system formed by two pairs of swinging arms by means of which the yielding body can be displaced between a lowered position and a raised position. To hold the yielding body in the raised position or, respectively, in the lowered position a locking system is provided which, in the raised position of the yielding body, applies a retaining force appreciably higher than in the lowered position of the yielding body and can be released by a push-button arranged on one side of the yielding body.
Claims24
Headrest for motor-vehicle seats, comprising:
- a) a yielding body;
- b) a support structure to connect said yielding body to a backrest of a motor-vehicle seat;
- c) said support structure comprising a lower pair arms having respective one ends pivotally attached to said yielding body and respective other ends pivotally attached to a pair of supports to be fixed to a seat backrest, and an upper pair of arms having respective one ends pivotally attached to said pair of supports and respective other ends pivotally connected to said yielding body;
- d) said upper pair of arms being articulated to provide a variable length when said yielding body is displaced between said lowered and raised position to thereby displace said yielding body forwardly and angularly when in said raised position, said variable length being the distance between the pivotal connection at said pair of supports and the pivotal connection at said yielding body of said upper pair of arms;
- and
- d) a releasable locking mechanism to hold said yielding body in said raised position or in said lowered position.
Headrest for motor-vehicle seats, comprising:
- a) a yielding body;
- b) a lower pair of arms having respective one ends pivotally attached to said yielding body and respective other ends pivotally attached to a pair of supports to be fixed to a seat backrest;
- c) an upper pair of arms having respective one ends pivotally attached to said pair of supports;
- d) a secondary pair of arms having respective one ends pivotally attached to respective other ends of said pair of upper arms, said secondary pair of arms having respective other ends pivotally connected to said yielding body;
- e) said lower, upper and secondary pairs of arms forming an articulated parallelogram support structure to displace said yielding body between a lowered position and a raised position;
- f) said secondary pair of arms being bent toward said upper pair of arms when said yielding body is in said lowered position;
- and
- g) said upper and secondary pairs of arms being extended out to a length greater than the length of said lower pair of arms when said yielding body is in said raised position, thereby to tilt and advance forward said yielding body relative to said lowered position.
Headrest for motor-vehicle seats, comprising:
- a) a yielding body;
- b) a support structure to connect said yielding body to a backrest of a motor-vehicle seat, said support structure comprising a lower pair and an upper pair of arms to displace said yielding body between a lowered position and a raised position;
- c) releasable locking mechanism to hold said yielding body in said raised position or in said lowered position;
- d) said locking mechanism comprising a slider member displaceable transversely of said arms between an inoperative and an operative condition, a pair of juxtaposed locking blocks movable parallel to said slider member between a mutually distal position and a mutually proximal position wherein said blocking blocks interact and do not interact, respectively, with said lower pairs of arms;
- e) a spring urging said locking blocks towards said distal position;
- and
- f) a stop element movable perpendicularly to said slider member and to said locking blocks and displaceable, following displacement of said slider member from said inoperative condition to said operative condition, from an advanced position in which said stop element is interposed between said blocking blocks to irreversibly keep them in said distal position, and a retracted position in which said locking blocks can be brought to said proximal position against the action of said spring upon putting said yielding body in said lowered position.
Dependencies are inferred from the claim text.