JPS5849599Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high frequency heating device which is a microwave oven equipped with a turntable.

A conventionally used microwave oven is formed as shown in FIG.

That is, the apparatus main body 1 is provided with a heating chamber 3 in which a door body 2 is pivotally attached to an opening.

In the heating chamber 3, a magnetron (not shown) oscillates high frequency waves to heat and cook the stored object a.The object to be heated a is placed on a turntable 4, and during heating, it rotates and generates high frequency waves. absorbs evenly.

The turntable 4 is driven and rotated by a drive motor 5, and the connection structure thereof is shown in FIG.

A mounting hole 3a is formed in the bottom surface of the heating chamber 3, into which a mounting cup 6 machined into a concave shape is screwed.

The drive motor 5 is fixed to a support plate 8 attached to the heating chamber 3 via a spacer, and its rotating shaft 5a is inserted into a through hole 9 formed in the mounting cup 6.

A transmission shaft 10 on which the turntable 4 is mounted is fitted onto the rotating shaft 5a so as to be movable in the axial direction and engaged in the circumferential direction.

Therefore, the transmission shaft 10 is connected from the heating chamber 3 to the rotating shaft 5a.
It can be easily attached and detached and is rotated by the drive motor 5.

A spacer 11 is interposed between the transmission shaft 10 and the heating chamber 3.

The spacer 11 is made of a Teflon material that is resistant to high frequencies and highly slippery, and prevents juice and the like from entering the cup 6 and also prevents leakage of radio waves from the through hole 9.

Originally, the spacer 11 should be molded at the same time as the transmission shaft 10, but due to material considerations, it is made separately.

By the way, as shown in FIG. 3, the spacer 11 is provided with an Aφ inner hole 11a, and loosely fits into the Bφ shaft portion 10a of the transmission shaft 10.

Therefore, when the rotating shaft 5a of the transmission shaft 10 is pulled out when cleaning the heating chamber 3, etc., the spacer 11
remains.

Therefore, the spacer 11 may be lost or the transmission shaft 1 may be lost.
0 to the rotating shaft 5a, it is necessary to align the holes with the spacer 11, which is troublesome and may be forgotten.

The present invention was developed based on the above circumstances, and its purpose is to provide a high-frequency heating device that has a relatively simple structure, facilitates spacer management, and simplifies assembly work. That is.

An embodiment of the present invention will be described below. Since the shape except for the transmission shaft is the same as that shown in FIGS. 1 and 2, the explanation will be omitted.

One embodiment of the transmission shaft will be explained based on FIGS. 4 and 5.

That is, the shaft portion 10a of the transmission shaft 10 is provided with a pair of engaging projections 12, 12, which are engaging portions.

It is desirable that these engaging protrusions 12.degree. 12 are provided at positions facing each other as much as possible, and the distance between both ends thereof is set to dimension C.

When assembling the device, the outer diameter Bφ of the shaft portion 10a of the transmission shaft 10 with respect to the inner hole Aφ of the spacer 11 is Aφ>
Since Bφ, the spacer 11 is connected to the shaft portion 10.
a Can be inserted from the bottom end.

However, since C>Aφ, the spacer 11 is the engaging protrusion 1.
It gets stuck at 2°12 and is difficult to insert beyond that.

However, since this spacer 11 has elasticity, when it is forcibly inserted, it gets over the engaging protrusions 12 and 12, resulting in the state shown in the figure.

Therefore, no matter where the transmission shaft 10 is located, the spacer 11 is always fitted into the shaft portion 10a and cannot be removed unless it is forcibly removed.

Therefore, when the transmission shaft 10 is in the heating chamber 3, the spacer 11 is interposed between the shaft 10 and the bottom surface of the heating chamber 3 to smooth the rotation of the shaft 10 and prevent mutual wear.

Furthermore, the spacer 11 prevents broth etc. from entering the cup 6 and also prevents radio waves from leaking from the through hole 9.

Furthermore, if the turntable 4 and the transmission shaft 10 are removed when cleaning the inside of the heating chamber 3, the spacer 11 remains engaged with the engaging protrusion 12 of the transmission shaft 10 and is removed from the heating chamber 3.
removed from.

Therefore, the spacer 11 is not left behind in the heating chamber 3, and cleaning is easy.

When the transmission shaft 10 is fitted onto the rotating shaft 5a again, the spacer 11 is returned to its original state at the same time and assembled.

The shape of the engaging portion 12 is not limited to that shown in FIGS. 4 and 5, but may also be formed, for example, in FIGS. 6 and 1.

In other words, the engaging groove 12 is cut parallel to the shaft portion 10a.
′ is provided.

The spacer 11 is also provided with an inner hole 14 that fits into the engaging groove 12'.

However, the diameter of the shaft portion 10 is larger than the minimum diameter of the inner hole 14 of the spacer 11 (Bφ>A), and although it is difficult to insert it, it is forcibly deformed using its elasticity, and the engaging groove 12' is forcibly deformed.
Insert into.

Thus, the same effects as in the above embodiment are obtained.

As described above, the shape of the engaging portion is not limited, and it is sufficient that the spacer 11 can be engaged only when the transmission shaft 10 is extracted from the rotating shaft 5a.

Although the mounting cup 6 is separate from the bottom surface of the heating chamber 3, the present invention is not limited thereto, and may be integrated.

As explained above, according to the present invention, a through hole is formed in the bottom of the heating chamber through which the rotating shaft of the drive motor projects, and a transmission shaft having a turntable is removably fitted to the rotating shaft, and the transmission Since an engaging part is provided on the shaft and the spacer interposed between the transmission shaft and the bottom of the heating chamber is engaged only when the transmission shaft is removed, the materials and shapes of the transmission shaft and spacer are different. Nevertheless, it is integrated, which has the effect of preventing loss of the spacer and facilitating assembly work.

[Brief explanation of drawings]

Fig. 1 is a front view of a microwave oven, which is a high-frequency heating device, showing a conventional example and an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of a turntable drive part showing a conventional example of the present invention, and Fig. 3 is a An explanatory diagram showing the relationship between the transmission shaft and the spacer,
FIG. 4 is a vertical cross-sectional view of a transmission shaft and a spacer showing one embodiment of the present invention, FIG. 5 is a bottom view thereof, and FIG. 6 is a cross-sectional view of a transmission shaft and a spacer showing another embodiment of the present invention. FIG. 7 is a bottom view thereof. 3...Heating chamber, 1...Device body, 9.
...Through hole, 5a... Rotating shaft, 5...
...Drive motor, 4...Turntable, 10
...Transmission shaft, 12...Latching part,
11...Spacer.

Claims (1)

[Scope of utility model registration request] A device body having a heating chamber, a through hole drilled in the bottom surface of the heating chamber of the device body, a drive motor with a rotating shaft protruding into the heating chamber through the through hole, and a rotating shaft of the drive motor. A transmission shaft having a turntable that is removably fitted, a hooking portion provided on the outer peripheral wall of the transmission shaft, and a hooking portion provided between the transmission shaft and the bottom surface of the heating chamber, which closes the through hole and transmits the information. A high-frequency heating device comprising: a spacer that engages with the engagement portion only when the shaft is extracted from the rotating shaft.