Power seat adjusting apparatus

• US 5,709,364 A
• Filed: 07/15/1996
• Issued: 01/20/1998
• Est. Priority Date: 07/28/1995
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Imasen Denki Seisakusho
• Original Assignee: Kabushiki Kaisha Imasen Denki Seisakusho
• Inventors: Mitsukuchi, Masashi, Mori, Akinori, Araki, Noriyuki, Kitoh, Norimasa, Banno, Hiroaki
• Primary Examiner(s): Chin-Shue, Alvin C.
• Assistant Examiner(s): Phan, Long Dinh
• Application Number:
  US08/679,906
• Time in Patent Office: 554 Days
• Field of Search: 248/157, 248/419, 248/421, 297/344.15, 297/344.17
• US Class Current: 248/421
• 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 2/1803 with independent front and/or rear adjustment
• CPC Class Codes: B60N 2/933 rotatable

Abstract

Output reduced by a reduction mechanism A contained within a tube type motor body 5 is transmitted to a threaded shaft 13, and a nut 15 having a wing element 15a for transforming rotation of the threaded shaft 13 to propulsion is threadingly engaged with the threaded shaft 13. Then, reduction and boost is made between a linear groove 16a of a guide member 16 secured to an inner wall of the body 5 and the rotation is transmitted to the body 5 by this rotational force, thereby an arm 17 provided on the body 5 is swung so that a base 3 is adjusted upwardly and downwardly about bearing members 2, 2a mounted on slide rails 1, 1. Owing to this arrangement, since a smaller installation space can be achieved, the apparatus can be made small in size and commonly used for various types of automotive vehicles. Moreover, the apparatus can be unitized. In addition, a high torque transmission is made possible by reduction and boost.

Claims

1. A power seat adjusting apparatus comprising a tube type motor body having a yoke formed of a tubular member, output from a motor being reduced and boosted to transmit its power to said tube type motor body so that said motor body itself is rotated, a base with a seat placed thereon being driven upwardly and downwardly by an arm secured to said tube type motor body, wherein rotational force of the output is transformed into propulsion by a wing element provided on a nut which is threadingly engaged with a feed thread mechanism and then reduced and boosted between a spiral groove and a linear groove formed within said body, so that the rotational force is transmitted to said tube type motor body.

2. A power seat adjusting apparatus according to claim 1, wherein a reduction mechanism contained within said tubular body employs a friction type planetary mechanism comprising a sun roller, a steel ball and a spring for preliminarily pressing a ring and another ring.

3. A power seat adjusting apparatus according to claim 1, wherein a needle pin retained by a retainer is disposed in a gap between a fixing tube and said tube type motor body so that an amount of deflection is suppressed.