Patent ID: 11858382
Assignee: YANFENG INTERNATIONAL SEATING SYSTEMS CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  A | IPC A  B

Claim 0:
1. A seat rotation locking mechanism, comprising:
a locking mechanism mounted on a rotating disc in a seat rotation mechanism; and
at least one lockhole disposed on an outer circumference, and facing radially outward, of a fixed disc in the seat rotation mechanism,
wherein the locking mechanism comprises:
a lock support fixed on the rotating disc; and
at least two lock pins horizontally and moveably configured in the lock support,

wherein for each lock pin amongst the at least two lock pins, a first end of the lock pin is of a truncated-cone-shaped structure, and the first end of the lock pin is inserted into the lockhole, to implement zero-clearance locking by using wedging between the truncated-cone-shaped structure of the first end of the lock pin and the lockhole, wherein
a kidney-shaped hole is disposed on a top surface of the lock support and a cam rotating along with a release lever rotating shaft is fixed to a shaft end of the release lever rotating shaft on one side of the top surface provided with the kidney-shaped hole, a stop pin avoiding slot and a stop pin limiting slot that are in communication with each other are disposed on the cam and a squeezing shifting plate is disposed axially on the cam, an axis disposition point between the squeezing shifting plate and the cam is located on a first end of the squeezing shifting plate, the first end of the squeezing shifting plate is connected to the lock support through a squeezing shifting plate return spring, and a stop pin is fixed between the first end and a second end of the squeezing shifting plate;
a squeezing protrusion is disposed at a position on the outer circumference of the fixed disc;
after the release lever is lifted to a release position, the cam rotates to the release position along with the release lever rotating shaft, in this case, the stop pin on the squeezing shifting plate passes through the stop pin limiting slot and the kidney-shaped hole and the stop pin is limited in the stop pin limiting slot and to a position of a first end of the kidney-shaped hole, the release lever is enabled to be at a release position and not return to a locking position even if a hand is released, and for each lock pin amongst the at least two lock pins, the release end of the release lever drives the lock pin to be at the release position, so that a tip of the first end of the lock pin is not in contact with the remaining part of the outer circumference of the fixed disc and not scraped; and
when the rotating disc rotates to the locking position, the second end of the squeezing shifting plate is in contact with the squeezing protrusion, the squeezing shifting plate turns over under the action of the squeezing protrusion, to enable the stop pin to pass through the stop pin avoiding slot and the kidney-shaped hole and enable the stop pin to be located in the stop pin avoiding slot and at a position of a second end of the kidney-shaped hole, in this case, the stop pin limiting slot in the cam does not limit the stop pin, the release lever returns to the locking position again under the action of the release lever return spring, and the lock pin is enabled to return to the locking position under the action of the lock pin return spring.