JPH0348717U

JPH0348717U -

Info

Publication number: JPH0348717U
Application number: JP11059889U
Authority: JP
Priority date: 1989-09-21
Filing date: 1989-09-21
Publication date: 1991-05-10

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示すエンジンの縦断
面図、第２図は同図Ａ−Ａ線に沿う横断面図、第
３図は磁気スケールの正面図、第４図はセンサの
側面図、第５図は磁気スケールおよびセンサの斜
視図、第６図はセンサの正面図、第７図は他の実
施例を示す同じくセンサの正面図である。第８図
は従来例を示す斜視図である。１１……エンジン、１３……クランク軸、１４
……ホイール、１７……凸部、１７ａ……回転側
面、１７ｂ……側面、１８……磁気スケール、１
９……凹部、２１……センサ、２３……コア、２
３ａ……先端部、２３ｂ……縁部、２４……コイ
ル。 Fig. 1 is a longitudinal cross-sectional view of an engine showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line A-A in the figure, Fig. 3 is a front view of the magnetic scale, and Fig. 4 is a side view of the sensor. 5 is a perspective view of the magnetic scale and the sensor, FIG. 6 is a front view of the sensor, and FIG. 7 is a front view of the same sensor showing another embodiment. FIG. 8 is a perspective view showing a conventional example. 11...Engine, 13...Crankshaft, 14
...Wheel, 17...Protrusion, 17a...Rotating side surface, 17b...Side surface, 18...Magnetic scale, 1
9... recess, 21... sensor, 23... core, 2
3a... tip, 23b... edge, 24... coil.

Claims

[Claims for Utility Model Registration] 1. Convex portions protruding in the radial direction at predetermined pitches are formed around a rotating wheel, and a magnetic sensor is provided opposite to the convex portions, and a magnetic field is generated as the wheel rotates. In a rotation angle detection device that detects changes in the rotation angle of the wheel, the magnetic sensor is arranged so that the direction of the magnetic field is approximately parallel to the rotation axis of the wheel, and the side surface of each convex part is arranged along a radiation line centered on the rotation axis of the wheel. A rotation angle detection device characterized in that it is formed with a (2) A rotating wheel in which protrusions projecting in the radial direction at a predetermined pitch are formed around a rotating wheel, and a magnetic sensor is provided facing the protrusions to detect changes in the magnetic field as the wheel rotates. What is claimed is: 1. A rotational angle detection device, characterized in that the tip of a core that emits a magnetic field of a magnetic sensor is formed to have a rectangular cross section.