JPH0252160U

JPH0252160U -

Info

Publication number: JPH0252160U
Application number: JP13256288U
Authority: JP
Priority date: 1988-10-11
Filing date: 1988-10-11
Publication date: 1990-04-13

Description

[Brief explanation of the drawing]

第１図イ，ロ，ハは、本考案よりなる回転セン
サの第１実施例を示した正面図、側面図、平面図
の各説明図、第２図イ，ロ，ハは本考案の第２実
施例を示した正面図、側面図、平面図の各説明図
、第３図は従来例の説明図である。１０ａ，１０ｂ，１０ｃ，１０ｄ……ヨーク、
１１……磁気検出素子、１２ａ，１２ｂ……永久
磁石、１３……ケース、１４……回転体、１５…
…突起（歯）。 Fig. 1 A, B, and C are explanatory diagrams of a front view, a side view, and a plan view showing the first embodiment of the rotation sensor of the present invention, and Fig. 2 A, B, and C are explanatory views of the first embodiment of the rotation sensor of the present invention. Each explanatory diagram of a front view, a side view, and a plan view showing two embodiments, and FIG. 3 are explanatory diagrams of a conventional example. 10a, 10b, 10c, 10d...Yoke,
11... Magnetic detection element, 12a, 12b... Permanent magnet, 13... Case, 14... Rotating body, 15...
...Protrusions (teeth).

Claims

[Scope of utility model registration request]

First to fourth yokes 10a, 10b, 10c, and 10d formed of magnetic plates are sequentially arranged approximately in parallel, and the first and second yokes 10a, 10b
a first permanent magnet 12a that magnetizes them in between,
A semiconductor magnetic detection element 11 is placed between the second and third yokes 10b and 10c, and a semiconductor magnetic detection element 11 is placed between the second and third yokes 10b and 10c.
A second permanent magnet 12b is arranged between the first permanent magnet 12b and the first permanent magnet 12b so as to magnetize them and the direction of the magnet is opposite to that of the first permanent magnet.
The end portions of the yoke are opposed to the teeth 15 of the rotating body 14 made of magnetic material, and the distance dimension at the end portions of the first and third yokes and the distance dimension at the end portions of the second and fourth yokes. A rotation sensor characterized in that the pitch dimension of the rotating body 14 is made to match the pitch dimension of the rotating body 14.