Title:
ELECTROMAGNETIC PUMP
Document Type and Number:
Japanese Patent JP2023036173
Kind Code:
A
Abstract:
To suppress noise.SOLUTION: An electromagnetic pump includes: a plunger 16 which can be moved to one direction by electromagnetic force; a stopper 18 which is disposed to face the plunger 16 in the one direction X; a movable body 20 which extends from one end 16a of the plunger 16 along the one direction X and moves together with the plunger 16; a first spring member 30 which is disposed to face an end surface 26a of an outer guide 26 and imparts elastic force for moving the plunger 16 together with the movable body 20 in the other direction Y; and a second spring 32 which is disposed to face the end surface 26a, has a natural length shorter than that of the first spring member 30, and has a spring constant larger than that of the first spring member 30. When a displacement amount of the plunger 16 to the other direction Y is maximum, a distance between the end surface 26a of the outer guide 26 and the second spring member 32 in the one direction X is shorter than a distance between the plunger 16 and the stopper 18 in the one direction X.SELECTED DRAWING: Figure 1
Inventors:
SHOJI YUKIHIRO
Application Number:
JP2021143057A
Publication Date:
March 14, 2023
Filing Date:
September 02, 2021
Export Citation:
Assignee:
NACHI FUJIKOSHI CORP
International Classes:
F04B17/04
Attorney, Agent or Firm:
Kobayashi Isao
Akira Yamano
Akira Yamano