Rotational position sensor, and electrically operated throttle device and accelerator position sensor using the same

A rotational position sensor comprising:

• a housing made of synthetic resin having an axial hole for guiding one end of a rotational shaft to a bottom wall, and holding a magnetic plate (hereinafter called “lower stator”) arranged around said axial hole;
• a magnetic plate (hereinafter called “upper stator”) mounted on said housing so as to oppose to said lower stator;
• a cover for holding said upper stator and covering said housing;
• a magnet type rotor mounted on one end of said rotational shaft and positioned between said upper stator and said lower stator;
• and
• a magnetic sensitive element arranged between a magnetic projecting portion provided on said upper stator and a magnetic projecting portion provided on said lower stator.

An electrically operated throttle device comprising a throttle valve for controlling flow rate of intake air of the internal combustion engine, a motor for driving a throttle shaft for supporting said throttle valve on the basis of a control signal to control a position of the throttle valve, a throttle body provided with said throttle valve internally thereof, a rotor for a throttle position senor mounted on one end of said throttle shaft, and a sensitive element sensitive to physical energy generated from said rotor and changed according to a rotational position of said rotor, in which a position of said throttle valve is detected from an output of said sensitive element, comprising:

• a cover mounted on the side wall surface of said throttle body so as to cover one end of said throttle shaft, a housing made of synthetic resin for incorporating said rotor and said sensitive element, and a connector provided with external connection terminals for connecting With external apparatuses being provided integral with said cover;
• conductors for connecting said external connection terminal to input/output terminals of said sensitive element, said conductors being embedded into said housing by insert-molding, one ends of said conductors being exposed onto the surface of the inner wall of the housing at a fixed position where the input/output terminals of said sensitive element are present;
• and
• a guide for guiding the input/output terminals of said sensitive element to said fixed position, said guide being formed in the inner wall of said housing, the input/output terminals of said sensitive element being guided by said guide and joined to the one ends of said conductors at said fixed opposition.

An accelerator position sensor comprising a rotor for a sensor mounted on a rotational shaft of an accelerator pedal, and a sensitive element sensitive to physical energy generated from said rotor and changed according to a rotational position of said rotor, in which a pressing-down position of the accelerator pedal is detected from an output of said sensitive element, comprising:

• a housing made of synthetic resin for incorporating said rotor and said sensitive element, said housing being integrally provided with a connector provided with external connection terminals for connecting with external apparatuses;
• conductors for connecting said external connection terminal to input/output terminals of said sensitive element, said conductors being embedded into said housing by insert-molding, one ends of said conductors being exposed onto the surface of the inner wall of the housing at a fixed position where the input/output terminals of said sensitive element are present;
• and
• a guide for guiding the input/output terminals of said sensitive element to said fixed position, said guide being formed in the inner wall of said housing, the input/output terminals of said sensitive element being guided by said guide and joined to the one ends of said conductors at said fixed opposition.