| 摘要 |
PURPOSE:To obtain a titled sensor small in size and with a simple structure, and to make piercing of a fitting hole unnecessary by supporting a revolving shaft of a swirling piece on which a magnetized body is distributed by a shaft supporting part rising from a sensor body provided with a projecting part, and molding a reed switch being parallel to the magnetized body in the body. CONSTITUTION:As a swirling piece 9 rotates, magnetized bodies 16, 16' correspond successively to a reed switch 13, the reed switch concerned 13 is opened and closed, and the number of times of opening and closing per unit time is expressed in terms of a speed of wind surfing and displayed on a speed indicator. A projecting part 12 is formed as one body on a sensor body 4, the projecting part is fitted between a fin fitting groove 3 and a fin tip part 21 when attaching the sensor, also, the tip of a fin base part 20 is fitted into a slit 18, a log sensor is attached exactly to a prescribed position together with a projecting part 12, and the fitting state is made firm. In this way, the sensor becomes small-sized, the structure is simplified, it is unnecessary to provide a special hole on the bottom part, and the log sensor is attached easily and firmly with one screw 5. |
