JPS6016067Y2 - Microwave oven heater installation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the mounting structure of a heater provided in a microwave oven.

The purpose is to provide a mounting structure for a microwave oven heater that facilitates the installation and replacement of the heater in the heating chamber of the microwave oven, and that reliably prevents radio wave leakage from the heater mounting section. It is something to do.

An embodiment of the present invention will be described below based on the drawings.

In the figure, 1 is the heating chamber of the microwave oven. A magnetron, a star fan, etc. (not shown) are attached to the upper wall 1a of the heating chamber 1, so that the objects to be heated stored in the heating chamber 1 can be heated and cooked.

Further, a heater 2, which will be described later, is attached to the upper part of the heating chamber 1.

That is, this is as shown in FIG. 2, and numeral 3 is a heat generating portion formed by inserting, for example, a nichrome wire into a quartz glass tube.

At both ends of this heat generating part 3, insulators 4a, 4 with Aφ dimension are provided.
b is provided.

Conductive insulators 5a and 5a are respectively provided on the outer end surfaces of these insulators 4a and 4b. 5b is provided protrudingly.

These conductive insulators 5a, 5b have insulator portions 6a, 6 with Bφ dimensions.
b, and bolt parts 8a and 8b into which the nuts 7.7 are screwed and electrically connected to the heat generating part 3.

The combined length of the heat generating part 3 and the insulator 4av4b is C.
Dimensions.

The heater 3 configured in this manner is fixedly attached to a mounting portion 9 provided in the heating chamber 1.

The mounting portion 9 is formed as shown in FIG.

That is, a fitting cylindrical body 11 having a fitting hole 10 having an inner diameter B'φ is protruded from one side wall 1b of the heating chamber 1.

Naori'φ=Bφ+α, and α only needs to be slightly smaller than 0.

An insertion hole 12 having a dimension of A'φ is bored in the side wall 1c on the side facing the side wall 2b.

Note that it is sufficient if A'φ=Aφ100.5 to 1.

Further, assuming that the distance between the side walls 1b and lc is C' dimension and the plate thickness is 9 dimensions, the relationship C≧C'+D is established.

The presser cap 13 is attached to the other side wall 1c with mounting screws 14.
It is attached and fixed by ....

The presser cap 13 consists of a fixed cylinder 16 having a fixing hole 15 coaxial with the insertion hole 12 and having a dimension of B'φ, and a mounting flange 17 integrally provided at one end of the fixed cylinder 16.

Next, a means for attaching the heater 3 to the attaching portion 9 constructed in this way will be explained.

The heater 3 is inserted into the heating chamber 1 through the insertion hole 12 while leaving the presser cap 13 removed.

After one conductive insulator 5a is fitted into the fitting hole 10, the presser cap 13 is fitted thereto while temporarily holding the other conductive insulator 5b.

That is, the fixing hole 15 is inserted into the conductive insulator 5b, and the mounting flange 17 is screwed onto the side wall 1c using the mounting screws 14.

Note that because of the relationship C≧C'+D, both end surfaces of the insulator 4aw4b are in close contact with the side wall 1a and the surfaces of the mounting flange 17, and the heater 2 is fixed.

Finally, connect the power supply and bolt parts 8a, 8b to the lead wire 18.1.
By electrically connecting at 8, the heater 2 can be used.

The object to be heated is placed in the heating chamber 1, the magnetron is excited, and the heater 2 is energized as required.

The object to be heated is cooked by the magnetron and the heater 2.

In addition, both inner end surfaces of the insulators 4a, 4b are in close contact with the side wall 1a and the mounting flange 17, and the fitting hole 10 and fixing hole 1b are slightly larger than the conductive insulators 5a, 5b. Since the fitting cylinder 11 and the fixed cylinder 16 are formed inside the cylinders, the radio waves oscillated from the magnetron never leak from the mounting part 9.

As explained above, according to the present invention, a fitting cylinder is provided protruding from one side wall of the heating chamber to removably fit one conductive insulator of the heater, and an insertion hole is bored in the other side wall. When the insulator of the heater is inserted and the other conductive insulator is fixed to this side wall, it has a fixed cylinder and a removable presser cap that presses and fixes the insulators together in the axial direction, making it possible to replace the conventional mounting structure. This does not require a large number of mounting parts and is very time-consuming, and the heater can be mounted and replaced very easily, improving workability and reducing costs.

Furthermore, it is possible to prevent leakage from the mounting portion of the heater, which is particularly effective in ensuring prevention of radio wave leakage, which is necessary in microwave ovens, and improving safety.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a heater mounting structure, FIG. 2 is a front view of the heater, and FIG. 3 is a longitudinal sectional view of the mounting portion of the heating chamber. 1...Heating chamber, 3...Heating part, 4a,
4b... Insulator, 5at5b... Conductive insulator, 3... Heater, 1b, 1c...
・Side wall, 11... Fitting cylinder, 12...
Insertion hole, 16...Fixed cylinder, 13...
Presser foot cap.

Claims (1)

[Scope of utility model registration request] In a microwave oven in which a heater consisting of an insulator of a larger diameter and a conductive insulator of a smaller diameter is installed at both ends of a heat generating part between opposing walls of the heating chamber of the microwave oven, the above-mentioned heating chamber a fitting cylinder protruding from one side wall of the heater into which one of the conductive insulators of the heater is removably fitted; an insertion hole bored into the other wall of the heating chamber into which the insulator of the heater is inserted; A mounting structure for a heater of a microwave oven, characterized in that it has a fixing cylinder for fixing a conductive insulator, and a presser cap that presses and fixes the insulators to each other in the axial direction and is detachably fixed to the other side wall. .