초록 ▼

Waveguide adapted to be mounted on the wall 1 of a cooking chamber between the antenna 2 of a magnetron 3 and an opening 5 provided in the wall 1, and comprising a metallic housing of generally tubular shape formed from a cover 7 comprising an upper elongated wall 8 of which a forward region extends

Waveguide adapted to be mounted on the wall 1 of a cooking chamber between the antenna 2 of a magnetron 3 and an opening 5 provided in the wall 1, and comprising a metallic housing of generally tubular shape formed from a cover 7 comprising an upper elongated wall 8 of which a forward region extends above the wall 1 and of which a rear region extends above the magnetron 3, two side walls 9 and 10, two transverse forward 11 and rear 12 walls, and a base 13 comprising a bottom wall 14 traversed by a hole 16 for passage of the antenna 2 and opening opposite the opening 5. The cover 7 is formed from a single piece obtained by stamping and bending a metal sheet. The invention is applicable to microwave ovens for household use.

대표청구항 ▼

In a waveguide adapted to be mounted on a wall (1) of a cooking chamber of a microwave oven between an antenna (2) of a magnetron (3) with which the oven is equipped and an opening (5) provided in the wall (1), and having a metallic housing of generally tubular shape of substantially rectangular cro

In a waveguide adapted to be mounted on a wall (1) of a cooking chamber of a microwave oven between an antenna (2) of a magnetron (3) with which the oven is equipped and an opening (5) provided in the wall (1), and having a metallic housing of generally tubular shape of substantially rectangular cross-section formed from a cover (7) with an upper elongated wall (8) of which a forward region extends above the wall (1) and of which a rear region extends above the magnetron (3), two longitudinal side walls (9 and 10), two transverse forward (11) and rear (12) walls, and a base (13) having a bottom wall (14) traversed by a passage hole (16) for the antenna (2) and open opposite the opening (5) to permit exit of waves; the improvement: wherein the cover (7) is formed of a single piece obtained by stamping and bending of a metal sheet; wherein the transverse forward wall (11) and portions of the two longitudinal side walls (9 and 10) adjacent the forward region of the upper elongated wall (8) bear respectively a bent edge (17) bent to a first portion (18) of a flat peripheral edge of the stamped cover (7) and having first securement means (19) with the wall (1); wherein the portions of the two longitudinal side walls (9 and 10) adjacent the rear region of the upper elongated wall (8) include, respectively, in their planes prolongations (9′and 10′) obtained by deflection and first bending of a second portion (20) of the flat peripheral edge of the stamped cover (7), each free edge of said prolongations (9′and 10′) comprising: a flange (21) which is obtained by a second bending and extends in a plane parallel to the bent edge (17), and which includes second securement means (22) with the bottom wall (14) as well as connection means (23) with the magnetron (3).