Seat slide mechanism for vehicles

• US 5,447,352 A
• Filed: 06/21/1993
• Issued: 09/05/1995
• Est. Priority Date: 06/22/1992
• Status: Expired due to Term

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: Ito, Sadao, Nawa, Hiroshi
• Primary Examiner(s): PAPE, JOSEPH
• Application Number:
  US08/078,815
• Time in Patent Office: 806 Days
• Field of Search: 296/65.1, 248/429, 248/430, 248/424, 74/425, 74/89.15, 74/89.14, 297/346
• US Class Current: 296/65.14
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• 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 seat slide mechanism for vehicles includes a screw member extending longitudinally within an interior portion of the upper rail and a nut member engaging with the screw member. The nut member extends downwardly between the opposed walls of the upper rail to the base of the lower rail to form separated spaces at the both sides of the nut member and between laterally elongated slide members of the upper rail and the base portion of the lower rail. These separated spaces are helpful in arranging the rollers without any interference with the nut member or the screw member.

Claims

1. A seat slide mechanism comprising:

an upper rail for attachment to a vehicle seat, a screw nut assembly including a screw member held by said upper rail and a nut member,

a lower rail for attachment to a vehicle floor, and having a base portion to which said nut member of said screw nut assembly is secured,

said upper rail being slidably attached to the lower rail and having an inverted generally U-shaped cross section for disposing said screw member therein and housing said nut member, said upper rail having opposed side walls and slidable strips, each of a generally U-shaped cross section laterally outwardly extending from said side walls, said lower rail having opposed portions each having an inverted generally L-shaped cross section upwardly extending from said base portion,

a pair of roller guides disposed between the slidable strips of said upper rail and the base portion of said lower rail,

rollers rotably supported on front and rear ends of each of said roller guides, and

a plurality of shoes secured to the opposed portions of said lower rail and engaging the slidable strips of said upper rail.

2. A seat slide mechanism according to claim 1, wherein said slidable strips extend outwardly from the lower portions of the opposed side walls of said upper rail.

3. A seat slide mechanism comprising:

a lower rail for attachment to a vehicle floor,

an upper rail for attachment to a vehicle seat slidably attached to said lower rail and provided at an end with a gear box, a screw member housed in the upper rail and connected for rotation by said gear box, and a nut member which is meshed with the screw member,

said upper rail having a main body in the form of an inverted generally U-shaped cross section and including opposed side walls, and slidable strips in the form of a generally U-shaped cross section which extend laterally outwardly from the opposed side walls, said lower rail having a base portion for supporting and securing said nut member and opposed portions in the form of a generally L-shaped cross section upwardly extending from both sides of said base portion to define longitudinally extending spaces at opposite sides of said nut member between said slidable strips and said base portion, a pair of longitudinally extending roller guides in said spaces and a plurality of rollers rotatably supported on each of said roller guides, said slidable strips engaging said opposed portions.