| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive bearing structure for a rotary antenna having a simple structure and a high reliability to a high frequency heater. SOLUTION: A pivoting support by a claw using elasticity of a resin is no more necessary as is the conventional case by sandwiching a bearing 1 of a rotary antenna of a high frequency heater between an antenna plate 10, a stepped part 4 provided on an antenna shaft 3 and a protrusion 11, and a fluoroplastic relatively low in elasticity, high in heat resistance, low in dielectric loss and high in slidability can be used for constituting the bearing 1, and in a high microwave output or heater-installed high frequency heater to which an application cannot be made due to temperature factor, the rotary antenna can be installed with a simple constitution. Assembly man-hour reduction and cost reduction can be realized by integrally forming a rivet 13 with the bearing 1 by integral molding.
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