Alps Electric Co., Ltd.

Hidemasa Suzuki

Ichiro Tokunaga

Hiraku Abe

Yasuaki Ogawa

Methods are provided for assembling a magnetic encoder wherein fluctuation of a magnetic gap arising from a change in temperature is minimized. The magnetic encoder comprises a magnetic scale having thereon a magnetic pattern which can be detected by a magnetic sensor, a sensor retainer for securely retaining the magnetic sensor with a magnetic gap left between the magnetic scale and the magnetic sensor, and a supporting member to which the sensor retainer is secured. According to the invention, a jig is affixed to a surface of the sensor retainer, and the jig is moved until the gap between the magnetic scale and the magnetic sensor reaches a predetermined width. The sensor retainer may be secured to a supporting member by first and second securing agents, the second securing agent being the harder and applied closer to the magnetic sensor than the first securing agent.

Methods for assembling and adjusting a magnetic encoder device

A magnetic rotary encoder device wherein fluctuation of a magnetic gap arising from a change in temperature is minimized, a printed circuit board on which an electric circuit electrically connected to a magnetic sensor is carried can be assembled readily, and a magnetic gap can be adjusted readily. The magnetic encoder device comprises a magnetic scale having thereon a magnetic code which can be detected by a magnetic sensor, a retaining member for securely retaining the magnetic sensor on a sensor mounting element with a magnetic gap left between the magnetic scale and the magnetic sensor, and a supporting member to which the retaining member is secured. A first bonding agent and a second, softer bonding agent secure the supporting member and portions of the sensor mounting element adjacent and remote from the supporting member to each other, respectively.

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Furukawa, Japan

Hidemasa Suzuki