Rotatable recliner for vehicle seat

Abstract

The present invention relates to a rotatable recliner for a vehicle seat, comprising: a gear rim plate, which has multiple arc-shaped guide protrusions that extend in a circumferential direction fromthe outer surface of the gear rim plate and are symmetrically arranged with respect to the center of the gear rim plate; and a circular cover plate, which covers an axially outer surface of the gear rim plate and has a circular rim end portion that is in contact with and supported by the inner peripheral surfaces of the multiple guide protrusions, wherein the rim end portion is formed to be inclined at a predetermined angle in the axial direction, and is thus pressed and supported toward the outer surface of the gear rim plate by the inner peripheral surfaces of the multiple guide protrusions.Therefore, the cover plate having an improved shape can improve an assembling method for the recliner.

Description

technical field [0001] The present invention relates to a recliner for adjusting the reclining angle of a seat back of a vehicle seat, more particularly, a rotary recliner for a vehicle seat that adjusts reclining according to rotational pressure based on a handle knob or an electric motor angle. Background technique [0002] Such as figure 1 Shown, generally speaking, the rotation pressure of the shaft (1) of the existing vehicle seat rotary recliner belonging to the same technical field as the present invention causes the cam (30) to rotate not only to release the spring (90) against the wedge (71, 72) locked (lock) state, also drives the above-mentioned wedges (71, 72) to rotate along the inner peripheral surface of the ring (40) at the same time, thereby realizing the ring gear plate (10 on the internal gear) side ) and the relative rotation of the large gear plate (20) on the external gear (external gear) side. [0003] However, according to the existing rotary recli...

AI Technical Summary

Problems solved by technology

[0003] However, according to the existing rotary recliner for vehicle seats as mentioned above, the spring (90) that is simply placed on the edge seating surface (33) of the cam (30) passes through the protruding ends on both sides that protrude along the axial direction. Partially pressurizes the wedges (71, 72) in the circumferential direction to apply elastic force, even so, but because there is no means for fixing it on the seating surface (33) to a certain extent, it is affected by external factors such as the above-mentioned elastic force. Irregular displacement occurs in the axial direction, so the elastic force for maintaining the locked state of the wedges (71, 72) cannot be stably and surely applied, resulting in an unstable state or even an abnormal unlocked state

If the position of the spring (90) is unstable, the aforementioned elastic force changes, that is, the tension applied to the wedges (71, 72) deviates and the rotational operation force applied by the user through the shaft (1) also changes, Thus, it becomes a factor that hinders product quality in terms of operational sensitivity

[0004] On the other hand, in the conventional rotary recliner for a vehicle seat, the ring gear plate (10) and the large gear plate (20) that house a plurality of parts inside are covered with a cover plate (50) to cover the ring gear plate ( 10) and cover the outer side of the above-mentioned large gear plate (20) with an open profile cover (60) on the inside, and then bend it to cover the outer edge part of the above-mentioned cover plate (50), and maintain the assembly by the aforementioned method state, but the requirements for improving the shape and assembly method of the cover plate (50) covering the entire ring gear plate (20) are increasing day by day.

Images