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Rotation angle sensor

A rotation angle and sensor technology, which is applied to instruments, uses electric/magnetic devices to transmit the direction of sensing components, measuring devices, etc., can solve the problems of complicated assembly process of the rotation angle sensor, and achieves easy wiring connection, easy assembly of parts, The effect of high magnetic shielding effect

Active Publication Date: 2010-12-01
TOKYO COSMOS ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure includes installation of the wiring board 3 into the magnetic shield case 4S, installation of the terminal block 5 into the case 4S, and connection of the wiring on the wiring board 3 and the terminal 5T of the terminal block 5, etc. , has the disadvantage that the assembly process of the rotation angle sensor is complicated

Method used

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Embodiment Construction

[0018] figure 1 Represent the top view of the first embodiment of the rotation angle sensor of the present invention, figure 2 and image 3 Respectively figure 1 The II-II section and III-III section. The rotation angle sensor includes: a casing 10 formed of a substantially cylindrical insulator having mounting protrusions 10A, 10B on both sides, a rotor 20 fitted in the casing 10 with one end protruding outward, and a casing fixed to the rotor 20 The magnet 21 at the other end in the body 10, the ring bearing 13 that is installed in the housing 10 and receives the inner end of the rotor 20 from one end, the wiring board 14 that supports the other end of the ring bearing 13, and the inside of the ring bearing 13. The rotor 20 is opposed to the magnet 21 in the axial direction with a magnetic sensor IC (integrated circuit) 15 mounted on the wiring board 14, a cylindrical magnetic shield 12 surrounding the ring bearing 13, and the wiring board. 14 and the cylindrical magn...

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Abstract

In this sensor, a rotatable rotor 20 is arranged inside a cylindrical case 10 and a cap-shaped magnetic shield 11 is set inside the case 10 so as to surround the rear end of the rotor. A magnet 21 fixed at the rear end of the rotor and a magnetic sensor IC 15, facing to the magnet, mounted on a wiring board 14 are arranged inside it. A terminal part 14A of the wiring board is protruded outside from the notch 11a formed at the sidewall of the cap-shaped magnetic shield 11. A cylindrical magnetic shield 12 is attached to the cap-shaped magnetic shield 11 so as to cover the notch 11a. The magnetic shielding effect is not lost and the assembly is easy.

Description

technical field [0001] The present invention relates to a rotation angle sensor for detecting the rotation angle of a rotary shaft used in automobiles and industrial machines. Background technique [0002] Conventionally, there is a rotation angle sensor in which a magnet is provided at the tip of a rotor that rotates in conjunction with a rotation shaft, and a magnetic sensor such as a magnetoresistive element facing the magnet at a distance from the magnet detects the rotation angle of the rotor. In order to make the detected rotation angle less susceptible to the influence of an external magnetic field, Patent Document 1 discloses a rotation angle sensor provided with a magnetic shield surrounding a magnet and a magnetic sensor. [0003] A cross section of the rotation angle sensor disclosed in Patent Document 1 is shown in Figure 9 . A wiring board 3 is fixed inside a soft magnetic bowl-shaped magnetic shield case 4S, on which a magnetic sensor MS is provided, and the ...

Claims

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Application Information

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IPC IPC(8): G01B7/30G01D5/12
Inventor 市仓学
Owner TOKYO COSMOS ELECTRIC CO LTD
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