公开(公告)号：US20170186453A1

公开(公告)日：2017-06-29

申请号：US15366342

申请日：2016-12-01

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Akihiro IINO ,  Masami OAKU ,  Takayuki KOSAKA

IPC: G11B5/48 ,  F16C43/06 ,  F16C33/60 ,  F16C33/78 ,  F16C19/16 ,  F16C33/38

CPC classification number: G11B5/4813 ,  F16C19/06 ,  F16C19/163 ,  F16C19/166 ,  F16C33/3806 ,  F16C33/416 ,  F16C33/60 ,  F16C33/7806 ,  F16C33/7886 ,  F16C43/065 ,  F16C2370/12

Abstract: A bearing device includes a shaft and a roller bearing externally inserted over the shaft. The roller bearing includes an inner ring disposed coaxially with a center axis of the shaft, an outer ring surrounding the inner ring from an outer side in a radial direction, and a plurality of rolling elements held between the inner ring and the outer ring to be capable of rolling. The inner ring includes an inner ring one half section disposed on one side in an axial direction and an inner ring other half section disposed on the other side in the axial direction. The inner ring one half section is in contact with the rolling elements from the one side toward the other side in the axial direction. The inner ring other half section is in contact with the rolling elements from the other side toward the one side in the axial direction. Preloads are applied to the inner ring one half section and the inner ring other half section in directions in which the inner ring one half section and the inner ring other half section come close to each other.

公开(公告)号：US20200215262A1

公开(公告)日：2020-07-09

申请号：US16703363

申请日：2019-12-04

Applicant: Seiko Instruments Inc.

Inventor： Yoichi ENDO ,  Akehiko SATO ,  Masami OAKU ,  Shinichi ASAI

IPC: A61M5/145 ,  A61M5/142

Abstract: A feeding device according to the present invention includes a tubular body which has an a female screw portion, a movable shaft which has a male screw portion and is movable between a start position and an end position according to a rotation of the tubular body, a final gear which is provided in the tubular body, a drive unit which has the driving gear, a power transmission mechanism which transmits a driving force from the driving gear to the final gear via a plurality of intermediate gears, and a biasing mechanism which is configured to apply a biasing force to the movable shaft. At least one of the plurality of intermediate gears is a two-stage gear. The biasing mechanism is configured to apply the biasing force from the end position toward the start position and presses the male screw portion against the female screw portion to the start position side.