JPS63232245A - Magnetron - Google Patents

Abstract

PURPOSE:To improve the accuracy of connecting process between a vane and the edge of the base of a microwave leading out conductor and the workability by furnishing integrally a slender projection penetrating a passage hole without contacting, to one of plural vanes, and connecting one end of the microwave leading out conductor to a recessed groove at the top edge of the projection. CONSTITUTION:A vane 16a which is one of plural rectungular vanes 16a, 16b,... projecting to a cathode 2 side from the inner peripheral surface of an anode cylinder 1 has integrally a slender projection 17 projecting along the tube axis. And the projection 17 penetrates a a passage hole 7 of the first magnetic pole piece 4 without contacting. By transferring the position of the vane 16a to be connected to a microwave leading out conductor 6 out of the magnetic pole piece 4, the connection can be made at the outside of the magnetic pole piece 4 accurately and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetron used in microwave heating equipment such as a microwave oven.

Conventional technology A magnetron used in microwave heating equipment such as a microwave oven is usually constructed as shown in FIG. A large number of rectangular vanes 3a, 3b, 3c... projecting to the side.
. . An elongated microwave deriving conductor 6 whose proximal edge is fixed to one of the vanes 3a, passes through a through hole 7 formed in the inclined surface of the first magnetic pole piece 4 without contacting it, It reaches a microwave output terminal 8 which also serves as an exhaust pipe.

The microwave output terminal 8 has an insulating ring 9 made of ceramic.
The outer peripheral edge of the flange portion of this metal tube 10 is hermetically sealed to the open end of the anode cylinder 1. 11.12 is a cathode terminal lead-out conductor, which is a stem insulator (
(not shown) and has an outer edge extending out of the tube.

The fixation of the microwave deriving conductor 6 to the vane 3a is as follows:
As shown in FIG. 4, the groove 14 formed in the former and the groove 15 formed in the latter are fitted so as to mesh with each other,
And, it is achieved by being brazed. Therefore, as long as the fitting is performed reliably, there will be no deviation in the fixed position (and there will be no variation in characteristics due to positional deviation here).

Problems to be Solved by the Invention However, the work of fitting the groove 15 existing at the proximal edge of the microwave deriving conductor 6 that has passed through the through hole 7 into the groove 14 when viewed from the outside of the magnetic pole piece 4 is difficult. It is not easy and sometimes the fifth
As shown in the figure, it may come off from the groove 14 and be brazed. Furthermore, the coaxiality between the conductor 6 and the through hole 7 may be impaired, and if this occurs, it is not possible to satisfactorily obtain the desired output characteristics.

Means for Solving the Problems According to the present invention, one of the plurality of vanes is integrally provided with an elongated protrusion that passes through the through hole without contacting it, and the protrusion is formed in the groove at the tip edge of the core. One end of the microwave deriving conductor is joined.

Function: With this configuration, a portion of the vane to be joined to the microwave deriving conductor is moved to the outside of the magnetic pole piece, so that the joining can be performed accurately and easily outside the magnetic pole piece. . In addition, when attaching the magnetic pole piece to the open end of the anode cylinder, the vane protrusion can be positioned correctly on the center position of the magnetic pole one-way hole, which eliminates the conventional disadvantages mentioned above. can be completely eliminated.

Example Next, the present invention will be explained along with embodiments shown in the drawings.

The configuration according to the present invention shown in FIG. 1 is different from the conventional configuration shown in FIG. 1
The vane 16a, which is one of the vanes 6c, integrally has an elongated protrusion 17 that protrudes along the tube axis, and this protrusion 17 is connected to the passage of the first magnetic pole piece 4. The hole 7 is penetrated without contact, and as shown in exploded view in FIG. They fit together and are brazed, but the other configurations remain the same.

Note that the anode cylinder 1, the vane 16a, and the microwave deriving conductor 6 are all made of oxygen-free steel. Also, the width a of the groove 18 is approximately the same as the thickness of the conductor 6 or slightly thicker than this, and the width of the groove 15 is approximately the same as the thickness of the protrusion 17 or It is slightly larger than this.

The concave groove 15 is fitted into the concave groove 18 so as to mesh with the concave groove 18, and brazed with a high melting point brazing material, as in the conventional manner.

Effects of the Invention As described above, according to the present invention, since the tip edge of the vane protrusion comes out of the magnetic pole piece through the through hole of the magnetic pole piece, the step of joining the base edge of the microwave deriving conductor to the vane is Both accuracy and workability can be improved. In addition, when attaching the magnetic pole piece to the open end of the anode cylinder, the vane protrusion can be positioned at the center of the through hole of the magnetic pole piece, thereby preventing contact or abnormal approach between the two. It also has the advantage of being preventable.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a magnetron embodying the present invention, FIG. 2 is an exploded perspective view of section A in FIG. 1, FIG. 3 is a partially cutaway side view of a conventional magnetron, and FIG. B in Figure 3
FIG. 5 is an exploded perspective view of the main parts of the magnetron shown in FIG. 3, showing the intervening points during assembly. l... Anode structure, 4, 5... Magnetic pole piece,
6... Microwave derivation conductor, 16a, 16b
, 16e...vane r, 17...protrusion, 18...concave groove. Name of agent: Patent attorney Toshio Nakao Figure 4 Figure 5

Claims (1)

[Claims] The inner peripheral surface of the anode cylinder, which is formed by attaching a mortar-shaped magnetic pole piece having a through hole in the inclined surface to one open end thereof, has a large number of vanes protruding from the surface toward the cathode side, and One of the holes is integrally provided with an elongated protrusion that passes through the through hole without contacting the through hole, and one end of the microwave emitting conductor is joined to a groove on the tip edge of the protrusion. Features a magnetron.