Patent ID: 8360525

Claim:
A reclining device of a seat for a vehicle comprising: a socket block 30 that has a socket protrusion 31 that is fitted on a shaft 1 , which passes through the socket protrusion 31 , and is inserted in a ring-shaped center protrusion 21 of an internal gear bracket 20 through a center hole 11 of an external gear bracket 10 , and an operating protrusion 32 that covers a first portion of the outer circumference of the ring-shaped center protrusion 21 ; a connecting plate 33 that connects the socket protrusion 31 with the operating protrusion 32 and where a wedge spring 90 is attached and a spring protrusion 34 that protrudes from a side of the connecting plate 33 in the opposite direction to the socket protrusion 31 and fixes the wedge spring 90 attached to the connecting plate 33 ; a bearing 40 that is inserted in the center hole 11 of the external gear bracket 10 ; and a power transmission unit that is in close contact with the bearing 40 while covering a second portion of the outer circumference of the ring-shaped center protrusion 21 , the second portion not covered by the operating protrusion 32 , and rotates along the ring-shaped center protrusion 21 by a contact with the operating protrusion 32 when the shaft 1 rotates such that the external gear bracket 10 rotates with respect to the internal gear bracket 20 .