US 12,225,654 B2
Microwave heating device
Mikio Fukui, Shiga (JP); Takashi Uno, Shiga (JP); Fumitaka Ogasawara, Hyogo (JP); Motoyoshi Iwata, Osaka (JP); Shinji Takano, Kyoto (JP); Daisuke Hosokawa, Shiga (JP); and Masayoshi Hiramoto, Nara (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/261,920
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Sep. 11, 2019, PCT No. PCT/JP2019/035646
§ 371(c)(1), (2) Date Jan. 21, 2021,
PCT Pub. No. WO2020/054754, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 2018-172001 (JP), filed on Sep. 14, 2018.
Prior Publication US 2021/0329749 A1, Oct. 21, 2021
Int. Cl. H05B 6/70 (2006.01); H05B 6/68 (2006.01)
CPC H05B 6/702 (2013.01) [H05B 6/686 (2013.01); H05B 6/707 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A microwave heating device comprising:
a heating chamber configured to accommodate a heating target object;
a microwave generator including a substrate, the microwave generator being configured to generate a microwave onto the substrate;
a waveguide mounted with the microwave generator; and
a coaxial connector including a center conductor, an insulator, an external conductor, and a positioning member,
wherein:
one end of the waveguide is connected to the heating chamber;
the center conductor is a single conductor including a first end and a second end, the first end being connected to the substrate of the microwave generator and the second end projecting into the waveguide;
the first end of the center conductor is closer to the microwave generator;
the second end of the center conductor is closer to the waveguide;
an air gap is defined between the center conductor and the insulator;
the positioning member includes a first flange, a second flange, and a third flange;
the first flange projects from a first part of a surface of the insulator and contacts a first part of the center conductor;
the second flange projects from a second part of the surface of the insulator and contacts a second part of the center conductor;
the third flange projects from a third part of the surface of the insulator and contacts a third part of the center conductor; and
the air gap includes: (i) a first space between the first flange and the second flange; and (ii) a second space between the second flange and the third flange.