Patent ID: 9389634
Filing Date: 2016-07-12
CPC Classification: B63H,G05G

Claim Text:
1. A helm device of a boat comprising: a case secured to a hull; a steering shaft which is rotatably arranged in the case and on which a steering wheel is mounted; a sensor configured to detect rotation of the steering shaft; and a stop mechanism configured to stop rotation of the steering shaft when the steering wheel is turned to a maximum steering angle, the stop mechanism comprising: a cylindrical portion which is relatively rotatable with respect to the steering shaft in a circumferential direction; an inversion control pin which is provided in a radial direction of the steering shaft, extending through both the cylindrical portion and the steering shaft, the inversion control pin being secured to one of the steering shaft and the cylindrical portion; a slit which is formed in the other one of the steering shaft and the cylindrical portion, and through which the inversion control pin is inserted to be movable in the circumferential direction; a first pin receiving stopper wall which is formed on one end of the slit in the circumferential direction, in which when the steering shaft rotates in a first direction, the first pin receiving stopper wall contacts the inversion control pin, thereby rotating the cylindrical portion in the first direction, and when the steering shaft rotates in a second direction, the first pin receiving stopper wall is separated from the inversion control pin by an angle which is greater than or equal to a minimum detection angle detectable by the sensor; and a second pin receiving stopper wall which is formed on the other end of the slit in the circumferential direction, in which when the steering shaft rotates in the second direction, the second pin receiving stopper wall contacts the inversion control pin, thereby rotating the cylindrical portion in the second direction, and when the steering shaft rotates in the first direction, the second pin receiving stopper wall is separated from the inversion control pin by an angle which is greater than or equal to the minimum detection angle detectable by the sensor.