Title:
ATTACHMENT STRUCTURE OF FILTER
Document Type and Number:
Japanese Patent JP2022142643
Kind Code:
A
Abstract:
To suppress deterioration of a waterproof performance due to residence of a liquid without using a special ventilation filter.SOLUTION: A ventilation filter 20 includes: a cylindrical part 21 inserted into an open hole of a waterproofness housing 10; a ventilation film 22 that is provided to the cylindrical part top edge, and covers a hollow part of the cylindrical part; a main body part 23 of a disk shape in which the ventilation film is provided; and a coming-off stop part 24 that is provided to the cylindrical part bottom edge. A diameter of the main body part is larger than that of the cylindrical part. The housing includes: a flat part 12 providing an open hole 14 near the center and having a cup shape in view of direction substantially orthogonal to a central axis ax of the open hole and provided at a position higher than the circumference; and an attachment part 11 having a curve part 13 provided to the circumference. In a state where the cylindrical part is inserted into the open hole, and the coming-off stop part is contacted to a back surface of the flat part, a seal member 30 of a circular annular shape whose outer diameter is smaller than that of the flat part is nipped between a front surface of the flat part and the main body part. When viewing it along the central axis, a border line between the flat part and the curve part and a peripheral edge of the main body part are overlapped, or the curve part and the peripheral edge of the main body part is overlapped.SELECTED DRAWING: Figure 2
Inventors:
USAMI MASAHIKO
SHINJI MASAHIRO
SHINJI MASAHIRO
Application Number:
JP2021042897A
Publication Date:
September 30, 2022
Filing Date:
March 16, 2021
Export Citation:
Assignee:
TRANSTRON INC
International Classes:
H05K5/06; F16B19/00
Attorney, Agent or Firm:
Yukari Sakata