公开(公告)号：US12203746B2

公开(公告)日：2025-01-21

申请号：US17758245

申请日：2020-04-24

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Shintaro Ueno ,  Yuki Kato ,  Yoshinori Shibahara

IPC: H05K1/14 ,  G01B7/30 ,  G01B11/26 ,  G01D5/14 ,  G01P3/36 ,  G01P3/481 ,  H02K11/215

Abstract: A rotary encoder is incorporated in an annular space formed between a hollow rotating shaft and an encoder case. The rotary encoder has an annular printed wiring substrate, a plurality of mounting substrates that are outward from the printed wiring substrate in the radial direction and are arranged in the circumferential direction, and inter-substrate wiring cables bridged between the printed wiring substrate and each of the mounting substrates in the radial direction. Power supply to the mounting substrates and signal transmission and reception between the mounting substrates can be accomplished without routing around the wiring cables. It is possible to achieve a rotary encoder that is suitable for being incorporated in a narrow annular space.

公开(公告)号：US11808612B2

公开(公告)日：2023-11-07

申请号：US17298974

申请日：2019-03-15

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Shintaro Ueno ,  Yoshinori Shibahara ,  Sadaharu Kanamori

IPC: G01B11/26 ,  G01D5/347 ,  H02K1/22

CPC classification number: G01D5/3473 ,  H02K1/22

Abstract: In this optical rotary encoder, detection tracks of a rotating disc are irradiated with detection light emitted from a light-emitting element. An optical signal obtained via slits in the detection tracks passes through a slit pattern in a fixed slit plate and is received by light-receiving surfaces of a light-receiving element. The slit pattern in the fixed slit plate is formed so as to fit into a range of an effective spot of the detection light. An LED or other light-emitting element that has a small effective spot diameter can be used, which is advantageous in terms of reducing costs and making the device more compact.