Title:
ATTACHMENT STRUCTURE OF HOUSING, LIGHTING DEVICE, AND ELECTRIC DEVICE
Document Type and Number:
Japanese Patent JP2020087568
Kind Code:
A
Abstract:
To provide an attachment structure of a housing which is advantageous for inhibiting occurrence of electric corrosion.SOLUTION: An attachment structure 30 of a housing 20 has: an annular intermediate member 32 including a female screw area 32a which engages with a bolt 31 and a male screw area 32b having a second pitch P2 different from a first pitch P1 of the female screw area 32a; a first nut 34 having a through hole 34a, a cylindrical part 34b, and a female screw part 34c which engages with the male screw area 32b; a second nut 36; a first packing 33; and a second packing 35. An outer diameter D6 of the cylindrical part 34b is smaller than an opening diameter D1 of a fitting hole 20c. At least a part of the female screw part 34c of the first nut 34 overlaps with the cylindrical part 34b in a direction perpendicular to a center axis of the first nut 34. Materials of the first nut 34 and the housing 20 are the same type of metal which is dissimilar to materials of the bolt 31 or the second nut 36. A material of the intermediate member 32 is resin.SELECTED DRAWING: Figure 3
Inventors:
KITAGAWA HISAO
Application Number:
JP2018216646A
Publication Date:
June 04, 2020
Filing Date:
November 19, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
F21V21/00; F16B5/02; F16B35/00; F16B37/00; F16B43/00; F21S8/00; F21V21/02
Attorney, Agent or Firm:
Masakazu Ito
Takayoshi Matsumoto
Satoshi Hosokawa
Mori Taishi
Takayoshi Matsumoto
Satoshi Hosokawa
Mori Taishi