SEAT CUSHION ADJUSTING APPARATUS

• US 20160339820A1
• Filed: 05/17/2016
• Published: 11/24/2016
• Est. Priority Date: 05/20/2015
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: KAJINO, Yusuke, MORI, Masatoshi
• Granted Patent: US 10,011,202 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A47C 7/14 of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions movably-coupled seat and backrests with elastic adjustment means A47C1/03261; elastically-mounted back-rests or backrest-seat units in the base frame A47C7/44
• 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 2/0284 Adjustable seat-cushion length B60N2/0224 takes precedence
• CPC Class Codes: B60N 2/62 Thigh-rests B60N2/914 takes precedence
• CPC Class Codes: B60N 2/933 rotatable
• CPC Class Codes: B60N 2/995 Lower-leg-rests, e.g. calf-rests
• CPC Class Codes: B60N 2205/20 Measures for elimination or compensation of play or backlash

Abstract

A seat cushion adjusting apparatus includes: a nut support mechanism that supports a nut member on a frame of a seat cushion; and a variable mechanism that changes a length of the seat cushion based on an axial movement of a screw shaft screwed to the nut member, wherein the nut support mechanism allows the nut member and the screw shaft to be integrally tilted while restricting rotation of the nut member.

Claims

1. A seat cushion adjusting apparatus comprising:

a nut support mechanism that supports a nut member on a frame of a seat cushion; and

a variable mechanism that changes a length of the seat cushion based on an axial movement of a screw shaft screwed to the nut member,

wherein the nut support mechanism allows the nut member and the screw shaft to be integrally tilted while restricting rotation of the nut member.

2. The seat cushion adjusting apparatus according to claim 1,

wherein the nut support mechanism interposes the nut member between a pair of support walls disposed to face each other in an axial direction of the screw shaft, and

wherein curved surfaces, which are convex toward the support walls facing end portions of the nut member in the axial direction, are formed in the end portions in the axial direction.

3. The seat cushion adjusting apparatus according to claim 1,

wherein the nut support mechanism includes a pair of support walls provided in positions interposing the nut member in a seat width direction, and

wherein the nut member has a rotation axis crossing both the support walls in the seat width direction.

4. The seat cushion adjusting apparatus according to claim 3,

wherein long holes extending in a vertical direction are formed in both the support walls in the seat width direction and the rotation axis of the nut member is formed by a shaft-like member inserted through the long holes.

5. The seat cushion adjusting apparatus according to claim 2,

wherein a holder member capable of elastically deforming is interposed between the support wall and the nut member.

6. The seat cushion adjusting apparatus according to claim 5,

wherein the holder member is made of resin.

7. The seat cushion adjusting apparatus according to claim 5,

wherein the holder member has the curved surfaces and is integrally tilted with the screw shaft and the nut member.

8. The seat cushion adjusting apparatus according to claim 5,

wherein the holder member has the rotation axis and is integrally tilted with the screw shaft and the nut member.