公开(公告)号：US10193425B2

公开(公告)日：2019-01-29

申请号：US14997714

申请日：2016-01-18

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Kosuke Yamamoto ,  Shinji Kinoshita

IPC: H02K37/00 ,  H02K15/02 ,  G04C3/14 ,  H02K37/16 ,  H02K1/02 ,  H02K1/04 ,  H02K15/12

Abstract: A stepping motor includes a one-piece stator integrally molded by using a Fe—Ni alloy plate through machining, a rotor accommodating through-hole, and in which a magnetic path is disposed around the rotor accommodating through-hole. A rotor is rotatably arranged inside the rotor accommodating through-hole. A magnetic core is connected to the stator, and a coil is wound on the magnetic core. A Cr-diffusion region having a molten-solidified portion of Cr is diffused in the Fe—Ni alloy stator in a portion of the magnetic path.

公开(公告)号：US20160209812A1

公开(公告)日：2016-07-21

申请号：US14997714

申请日：2016-01-18

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Kosuke Yamamoto ,  Shinji Kinoshita

IPC: G04C3/14 ,  H02K15/02 ,  H02K37/00

CPC classification number: H02K15/02 ,  G04C3/14 ,  H02K1/02 ,  H02K1/04 ,  H02K15/12 ,  H02K37/16

Abstract: There is provided a stepping motor including a stator that is integrally molded by using a Fe—Ni alloy plate through machining, that has a rotor accommodating through-hole, and in which a magnetic path is disposed around the rotor accommodating through-hole, a rotor that is rotatably arranged inside the rotor accommodating through-hole, and a coil that is disposed in the stator. A Cr-diffusion region having a molten-solidified portion of Cr is formed in a portion of the magnetic path.

Abstract translation: 提供了一种步进电动机，其包括使用通过机械加工的Fe-Ni合金板整体模制的定子，该定子具有转子容纳通孔，并且其中磁路设置在转子容纳通孔周围， 可旋转地设置在转子容纳通孔内部的转子和设置在定子中的线圈。 具有熔融凝固部分Cr的Cr扩散区形成在磁路的一部分中。

公开(公告)号：US11929640B2

公开(公告)日：2024-03-12

申请号：US17022918

申请日：2020-09-16

Applicant: Seiko Instruments Inc.

Inventor： Kosuke Yamamoto ,  Shinji Kinoshita ,  Hitoshi Takeuchi ,  Tatsuya Omura

IPC: H02K1/14 ,  G04C3/14 ,  H02K15/02 ,  H02K37/16 ,  G04C3/12

CPC classification number: H02K1/143 ,  G04C3/14 ,  H02K15/022 ,  H02K37/16 ,  G04C3/12

Abstract: A stator includes a magnetic plate material that has a main plate surface that is a surface to face a main plate of a movement when assembled to the main plate and that has a rotor accommodating hole formed in a part thereof; and a non-magnetic region that is made non-magnetic by applying chromium on the main plate surface around the rotor accommodating hole and irradiating the chromium with a laser from the main plate surface side.

公开(公告)号：US10146186B2

公开(公告)日：2018-12-04

申请号：US15295477

申请日：2016-10-17

Applicant: Seiko Instruments Inc.

Inventor： Kosuke Yamamoto ,  Shinji Kinoshita

IPC: H02K1/02 ,  G04C3/14 ,  G04B19/04 ,  H02K15/02

Abstract: A stepping motor includes a rotor that is used in rotating an indicating hand, and a stator that configures a magnetic path, that is made of an alloy containing Fe, Ni, and Cr, and in which a Cr-diffusion region whose Cr-concentration is 14 mass % or greater is disposed in a portion whose cross-sectional area in the magnetic path is smaller than a cross-sectional area of other portions.