Vehicle seat reclining device

A technology of tilting device and vehicle seat, applied in the direction of vehicle seat, special position of vehicle, movable seat, etc., can solve the problems of thermal influence, insufficient durability, inability to rotate and move the wedge parts, etc., and achieve smooth angle adjustment, The effect of suppressing the increase in rotation speed
CN101720193AInactive Publication Date: 2010-06-02AISIN SEIKI KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AISIN SEIKI KK
Publication Date
2010-06-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

A vehicle seat reclining device allowing smooth adjustment of seatback angles. The vehicle seat reclining device has an internally toothed gear (12) formed on a gear plate (1) fixed to a lower arm; an externally toothed gear (22) formed on an upper arm (2), meshing with the internally toothed gear, and having teeth the number of which is less by at least one or more than the number of the teeth of the internally toothed gear; wedge members (7a, 7b) capable of being frictionally engaged with or disengaged from the gear plate or the upper arm; a spring (9) provided between the wedge members and urging the wedge members in the direction in which they are frictionally engaged with either the gear plate or the upper arm; a drive shaft (6) for rotating in a pressing manner either of the wedge members in the direction in which it is released from the frictional engagement; and a ring member (75a) provided in a relatively rotatable manner between either the gear plate or the upper arm and the wedge members and, when the drive shaft rotates, rotating together with the wedge members so as to rotate relative to the other of the either the gear plate or the upper arm.
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Description

technical field

[0001] The present invention relates to a seat reclining device for a vehicle that adjusts the angle of a seat back of a vehicle seat. Background technique

[0002] In the past, as a seat reclining device for a vehicle, as shown in Patent Document 1, it has: a lower arm (20) installed on the seat cushion side and fixed with an internal tooth gear (32); The upper arm (10) of the external tooth gear (31) with few teeth gears (32); a pair of wedge parts (35, 36) capable of frictional engagement and release of frictional engagement with respect to the lower arm (20) and the upper arm (10); A spring (37) disposed between a pair of wedge members (35, 36) and normally biased toward one of the wedge members (35, 36) in a frictional engagement; a drive shaft (33) that makes the pair of wedge members One of (35, 36) overcomes the elastic force of spring (37) to move toward the direction of disengaging frictional engagement, and makes wedge member (35, 36) rotate relat...

Claims

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