CONVEYANCE SEAT

• US 20150090856A1
• Filed: 09/23/2014
• Published: 04/02/2015
• Est. Priority Date: 09/30/2013
• Status: Active Grant

• Current Assignee: Toyota Boshoku Kabushiki Kaisha
• Original Assignee: Shiroki Corporation (Aisin Corp.), Toyota Boshoku Kabushiki Kaisha
• Inventors: KONDOU, Keiichi, ENOKIJIMA, Tomohiro, TSUJI, Eiichiro, MORISHITA, Kentarou, KISHIDA, Hideyoshi, KANEHIRA, Masayuki
• Granted Patent: US 9,597,980 B2
• Time in Patent Office: Days
• US Class Current: 248/429
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• CPC Class Codes: B60N 2/02253 characterised by the transmission between the electric motor and the seat or seat parts
• CPC Class Codes: B60N 2/02258 characterised by the mounting of the electric motor for adjusting the seat
• CPC Class Codes: B60N 2/067 by linear actuators, e.g. linear screw mechanisms
• CPC Class Codes: B60N 2/0705 omega-shaped
• CPC Class Codes: B60N 2/0715 C or U-shaped
• CPC Class Codes: B60N 2/075 roller-less

Abstract

A conveyance seat includes: a pair of lower rails; a pair of upper rails, each of which is slidably assembled to the corresponding lower rail; an electric drive mechanism; a pair of brackets, each of which is assembled to an upper surface of the corresponding upper rail; and a pair of buffer members, each of which is arranged between the upper surface of the upper rail and the bracket. The electric drive mechanism includes a drive source fastened to one of the brackets; a shaft; a pair of screws assembled one to each rail of the lower rails or the upper rails; a pair of nuts; and a pair of gear subassemblies. The electric drive mechanism electrically slides each upper rail with respect the corresponding lower rail by the screw moving relative to the nut or by the nut moving relative to the screw, by rotation of the shaft when the drive source is driven.

Claims

1. A conveyance seat comprising:

a pair of lower rails that are assembled to a floor-side member;

a pair of upper rails, each of which is slidably assembled to the corresponding lower rail;

an electric drive mechanism that electrically slides each upper rail with respect to the corresponding lower rail;

a pair of brackets, each of which is assembled to an upper surface of the corresponding upper rail; and

a pair of buffer members, each of which is arranged between the upper surface of the upper rail and the bracket, wherein;

the electric drive mechanism includes a drive source that is fastened to one of the brackets;

a shaft that rotates by driving force of the drive source;

a pair of screws that are assembled one to each rail of the lower rails or the upper rails;

a pair of nuts, each of which screws onto the corresponding screw; and

a pair of gear subassemblies, each of which transmits rotation of the shaft to the corresponding nut; and

the electric drive mechanism electrically slides the upper rail with respect the lower rail by the screw moving relative to the nut or by the nut moving relative to the screw, by rotation of the shaft when the drive source is driven.

2. The conveyance seat according to claim 1, further comprising a pair of assembly members, each of which is inserted into a mounting hole provided in the corresponding bracket, and which assembles the bracket to the upper surface of the upper rail, wherein

the buffer member is provided such that each assembly member is inserted into the corresponding buffer member and the buffer member sandwiches an edge of the mounting hole from both surface sides.

3. The conveyance seat according to claim 1, wherein:

the shaft includes a first shaft and a second shaft;

the first shaft is connected at one end to the drive source, and fastened at the other end to one of the gear subassemblies; and

the second shaft is connected at one end to the drive source, and fastened at the other end to the other gear subassembly.