Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Shozoh Shiraga

Hiromitsu Noda

Masahide Onishi

Yasunori Tomino

Tamotsu Ohta

Yusuke Baba

Toshio Tanaka

Tetsuya Koma

Kazumine Koshi

Yuji Doi

Mayuko Okada

Koji Toyota

Tohru Arakawa

Masayoshi Komori

Tamotsu Ota

The present invention relates to a rotation angle detection device mainly used for rotation angle detection of a steering wheel of an automobile and the like. In the rotation angle detection device of the present invention, support portions for supporting lower surfaces of magnets and retention portions for retaining upper surfaces of the magnets are provided in respective accommodation portions of first and second detection bodies. The magnets are turned in the accommodation portions, and the magnets are press-fitted into lower surfaces of the retention portions so as to be retained and fixed between the support portions and the retention portions. Thereby, an inexpensive rotation angle detection device in which the magnets can be easily and reliably installed in the detection bodies with a simple configuration without individually using holders can be realized.

Rotation angle detection device

A rotation angle detection device includes rotary bodyrotating in linked motion with a steering wheel; detectorsandthat rotate in linked motion with rotary body; detecting partsandfor detecting rotation of detectorsand; control partfor detecting a rotation angle of rotary bodyfrom a detection signal from detecting partsand; latching bodyfor latching the rotation of rotary body; and casecontaining rotary body, detection partsand, control partand latching body. Latching bodyincludes latching partB urged by elastic bodyand brought into elastic contact with an outer periphery of rotary body; and releasing partC for releasing an elastic contact of latching partB to rotary bodyand a part of which is exposed to the outside of case

A rotation angle detector includes a rotator, first and second detecting bodies, an auxiliary detecting body, first and second detectors, an auxiliary detector, and a controller. The first detecting body rotates in association with the rotator, and the first detector detects rotation of the first detecting body. The second detecting body rotates in association with the first detecting body at a different speed therefrom, and the second detector detects rotation of the second detecting body. The auxiliary detecting body is engaged with the rotator at a position symmetrical to the first detecting body with respect to a rotation axis of the rotator. The auxiliary detector detects rotation of the auxiliary detecting body. The controller detects a rotation angle of the rotator based on detection signals from the first, second, and auxiliary detectors.

Rotation angle detector

The present invention relates to a rotation angle detector for use mainly in detecting rotation angles of a vehicle's steering shaft, with a simplified and low-cost configuration. For this purpose, a first detection head and a second detection head are disposed perpendicularly to a rotor, and a spur gear formed outside the periphery of the first detection head is allowed to engage with a face gear formed on the bottom face of the periphery of the rotor. This can provide the first detection head with a simplified configuration in which magnetic sensors are provided together with a controller on a single circuit board. The configuration enables the rotation angle detector to perform the detection reliably and cheaply.

Rotation angle detector having detection heads disposed perpendicular to a rotor

A rotational angle detector has a rotary body, a first detecting unit rotating in cooperation with the rotary body, a second detecting unit rotating in cooperation with the first detecting unit, and an auxiliary detecting unit rotating in cooperation with the rotary body and the second detecting unit. The rotational angle detector has a first detecting element, a second detecting element, and a controller. The first detecting element detects rotation of the first detecting unit, and the second detecting element detects rotation of the second detecting unit. The controller detects a rotational angle of the rotary body based on a detection signal supplied from the first detecting element and a detection signal supplied from the second detecting element.

Rotational angle detector for detecting a rotational angle of a rotating body

A rotation angle detector has a rotary member which is rotated in association with a steering shaft, detecting members each of which is rotated in association with the rotary member, magnets which are arranged in correspondence to these detecting members and rotated integrally with these corresponding detecting members, magnetic sensing devices which are arranged opposed to the respective corresponding magnets, and a controlling circuit for calculating a rotation angle of the steering shaft based on detection signals from the magnetic sensing devices, wherein at least one of the magnets has a first section on a side of the magnetic sensing device, and a second section on a side opposite to the magnetic sensing device, and the north pole and the south pole of the first section are arranged in a reversed manner to those of the second section.

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Fukui, Japan

Shozoh Shiraga