Bed mode mechanism for aircraft passenger seat

Patent metadata

Field	Value
Publication number	US-2017113802-A1
Application number	US-201415123044-A
Country	US
Kind code	A1
Filing date	Aug 26, 2014
Priority date	Mar 14, 2014
Publication date	Apr 27, 2017
Grant date	—

Abstract

An aircraft passenger seat ( 100 ) has a seat bottom frame ( 150 ), and the seat bottom frame ( 150 ) is supported by an eccentric cam ( 210 ). A seat back frame ( 170 ) which rotates about a support point ( 250 ) is provided with a damper mechanism ( 300 ). When the seat back frame ( 170 ) is tilted forward from an upright position about the support point ( 250 ), a gas damper ( 310 ) is compressed and prevents rapid tilting. This energy assists force for returning the seat back to the upright position. The eccentric cam ( 210 ) rotates and lowers the seat bottom frame ( 150 ) so as to prevent cushions from being collapsed. A lock mechanism ( 400 ) highly rigidly retains the seat back frame at a bed mode position.

First claim

1 . A bed mode mechanism for an aircraft passenger seat comprising:
a frame fixed to a floor surface of an aircraft and supporting both side portions of a structural member of a seat; a seat bottom frame comprising a rear portion supported by a support point on the frame; an eccentric cam supporting a lower surface of the seat bottom frame; a seat back frame comprising a lower portion supported by a support point on the frame; a head rest frame connected to an upper portion of the seat back frame; a lock mechanism locking the seat back frame at an upright position where the seat back frame is positioned upright and a bed mode position where the seat back position is tilted forward; and a damper mechanism provided on both side portions of the seat back frame, wherein a damper unit configuring the damper mechanism is compressed and stores energy by an operation where the seat back frame is tilted from the upright position to the bed mode position, and assists a force when returning the seat back frame to the upright position.

2 . The bed mode mechanism for an aircraft passenger seat according to claim 1 , wherein
the eccentric cam supporting the lower surface of the seat bottom frame rotates by the operation where the seat back frame is tilted from the upright position to the bed mode position, and lowers the seat bottom frame.

3 . The bed mode mechanism for an aircraft passenger seat according to claim 1 , wherein
the lock mechanism comprises two receive members provided on the frame side, a lock pin provided on the seat back frame, a spring biasing the lock pin toward the receive member, and a buckle connected to a handle and pulling out the lock pin from the receive member, and a tapered angle of a tapered surface provided on a leading end of the lock pin and a tapered angle of a tapered surface forming a receive surface of the receive member are formed approximately equal.

4 . The bed mode mechanism for an aircraft passenger seat according to claim 1 , wherein
the damper unit configuring the damper mechanism is a gas damper.

Assignees

• Jamco Corp

Inventors

• Ozaki Masaji
• Tagami Nozomu
• Ootake Sanae

Classifications

• B64D11/0641 Primary

  Seats convertible into beds · CPC title

• B60N2/3011

  the back-rest being hinged on the cushion, e.g. "portefeuille movement" · CPC title

• B60N2/3065

  in a longitudinal-vertical plane · CPC title