公开(公告)号：US20210236720A1

公开(公告)日：2021-08-05

申请号：US17155873

申请日：2021-01-22

Applicant: Seiko Instruments Inc.

Inventor： Tetsuya NAGATA ,  Akehiko SATO ,  Yoichi ENDO

IPC: A61M5/145

Abstract: The present invention relates to a chemical solution pump including a holding member that holds a syringe discharging a chemical solution in association with a movement of a plunger, a drive unit that presses the plunger with a predetermined driving force to move the plunger in a first direction toward an inside of the syringe, and an adjustment mechanism that adjusts the movement of the plunger so that the plunger moves with the driving force. The adjustment mechanism applies an auxiliary force to the plunger in a direction the same as the first direction, or applies a reaction force to the plunger in a second direction opposite to the first direction, in accordance with a difference between a resistance force generated by the movement of the plunger inside the syringe and the driving force.

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.

公开(公告)号：US20210236718A1

公开(公告)日：2021-08-05

申请号：US17157265

申请日：2021-01-25

Applicant: Seiko Instruments Inc.

Inventor： Tetsuya NAGATA ,  Akehiko SATO ,  Yoichi ENDO

IPC: A61M5/145 ,  A61M5/168 ,  A61M5/158 ,  A61M5/142

Abstract: The present invention relates to a quantitative amount feed mechanism including a functional unit disposed to be movable along an axis, a drive unit that presses the functional unit with a predetermined driving force to move the functional unit in a first direction along the axis, and an adjustment mechanism that adjusts a movement of the functional unit so that the functional unit moves with the driving force. The adjustment mechanism applies an auxiliary force to the functional unit in a direction the same as the first direction, or applies a reaction force to the functional unit in a second direction opposite to the first direction, in accordance with a difference between a resistance force generated by the movement of the functional unit and the driving force.