SEAT LIFTER

• US 20140077554A1
• Filed: 05/16/2012
• Published: 03/20/2014
• Est. Priority Date: 05/19/2011
• Status: Abandoned Application

• Current Assignee: Shiroki Corporation (Aisin Corp.)
• Original Assignee: Shiroki Corporation (Aisin Corp.)
• Inventors: Fujioka, Hidehiko, Ito, Toshiharu
• Application Number:
  US14/118,755
• Publication Number:
  US 20140077554A1
• Time in Patent Office: Days
• US Class Current: 297/313
• CPC Class Codes: A47C 3/20 Chairs or stools with vertically-adjustable seats tables with variable height A47B9/00
• 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 2/1615 Parallelogram-like structure
• CPC Class Codes: B60N 2/165 Gear wheel driven mechanism
• CPC Class Codes: B60N 2/1839 pivoting about an axis located in an intermediate position
• CPC Class Codes: B60N 2/1864 Gear wheel driven mechanism
• CPC Class Codes: B60N 2/682 Joining means

Abstract

[Problem] The present invention relates to a seat lifter capable of changing the height or inclination of an inner side lower arm and outer side lower arm of a seat cushion and addresses the problem of providing a seat lifter wherein the welding position of a rod to a link remains fixed. [Solution] Links (link members) (19, 191, 61, 161) are provided with shaft sections (31a, 119b, 61a, 161b) having through holes and are rotatably held on the outer peripheral surfaces of the shaft sections (31a, 119b, 61a, 161b). Rods (53, 69) are inserted through the through holes of the links (19, 191, 61, 161) and welded.

Claims

1. A seat lifter capable of changing height or inclination of an inner-side lower arm and outer-side lower arm of a seat cushion, the seat lifter comprising:

a first link member provided at one lower arm of an outer-side lower arm and an inner-side lower arm;

a second link member provided at an other lower arm of an inner-side lower arm and an outer-side lower arm; and

a rod having one end attached to a first link member and an other end attached to the second link member,

wherein at least one of the link members includes a shaft portion with a hole and is rotatably held in the lower arm on an outer peripheral surface of the shaft portion, and

wherein the rod is welded in a state of being inserted into the hole of the link member.

2. The seat lifter according to claim 1,

wherein the shaft portion is formed integrally with the link member.

3. The seat lifter according to claim 1,

wherein the link member comprises:

a link; and

a bush that is provided to the link and is configured by a cylindrical portion, both ends of which are formed as an open face and which serves as the shaft portion, and a collar portion, which is formed at an outer peripheral surface of the cylindrical portion and welded to an edge of a hole of the link.

4. The seat lifter according to claim 1,

wherein the shaft portion of the first link member is formed integrally with the first link member, and

wherein the second link member comprises:

a link; and

a bush that is provided in the link and is configured by a cylindrical portion, both ends of which are formed as an open face and which serves as the shaft portion, and a collar portion, which is formed at an outer peripheral surface of the cylindrical portion and welded to an edge of a hole of the link.

5. The seat lifter according to claim 1,

wherein the shaft portion of the first link member is formed integrally with the first link member, and

wherein the shaft portion of the second link member is formed integrally with the second link member

6. The seat lifter according to claim 3,

wherein the lower arm is brought into sliding contact with the side portion of the collar portion.

7. The seat lifter according to claim 3,

wherein a diameter of a part of the cylindrical portion of the bush that is rotatably held in the lower arm is different from a diameter of a part of the cylindrical portion of the bush to which the rod is inserted.

8. The seat lifter according to claim 3,

wherein the cylindrical portion at one side portion of the collar portion of the bush is attached to the link,

wherein the cylindrical portion at the other side portion of the collar portion of the bush is attached to the lower arm, and

wherein the collar portion of the bush is brought into sliding contact with the lower arm.