JPS5840555Y2 - Koushiyuuhakanetsouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety device for a high-frequency heating device, and its purpose is to allow the door to be opened and closed only when the timer is off.

As shown in FIG. 1, a conventional high-frequency heating device has a door 3 installed in a front opening of a heating chamber 2 provided in a main body 1 so as to be openable and closable.

Reference numeral 4 indicates a handle provided on the front side of the door 3, and reference numeral 5 indicates a door key protruding toward the heating chamber 2 side of the door 3.

6 is a see-through window that prevents radio wave leakage.

7 indicates an operating lamp, and 8 indicates an operating switch.

Reference numeral 9 indicates an opening into which the door key 5 is inserted, and reference numeral 10 indicates a timer.

With this structure, the door 3
can be opened and closed freely, so if the timer 10 is still on when the object to be heated is taken out from the heating chamber 2 after heating is finished, the operation switch 8 may be operated by mistake and radio waves will be emitted in a no-load state. there is a possibility.

In particular, in devices without an activation switch 8, radio waves are emitted simply by closing the door 3, so the possibility of this happening is very high.

If radio waves are emitted in a no-load state, the life of the magnetron will be significantly shortened, and the heating chamber 2, door 3, and other parts will become hot, creating a risk of burns or fire.

Therefore, the present invention is intended to solve the problems caused by the above-mentioned malfunctions, and one embodiment of the present invention will be described below.

Note that the same parts as in FIG. 1 are indicated by the same symbols.

In FIGS. 2 and 3, there is a protrusion 11 with a protrusion at the tip provided on the back surface or part of the peripheral edge of the door 3. When the door 3 is closed with the timer 10 turned off, the protrusion 11 opens into the insertion slot. 12 is inserted.

On the back side of this insertion port 12, there is a rotating disk 13 that moves with the timer 10, and when the timer 10 is off, the insertion port 12
The part that overlaps is cut out.

Therefore, when the timer 10 is off (the state shown in Figure 3a), the door 3 can be opened and closed freely, but when the timer 10 is turned on (
Figure 3) The notch of the rotating disk 13 is the protruding part 11.
Since the door 3 rotates in a non-contact state, even if an attempt is made to open the door 3, the protrusion of the protrusion 11 hits the rotary disk 13 and the door 3 does not open.

Furthermore, when taking out the object to be heated during heating, the door 3 will not open unless the timer 10 is turned off, so if the timer 10 is still on when the object to be heated is taken out, as in the past, radio waves may be mistakenly transmitted. There is no need to worry about taking it out.

In other words, the problems of abnormally high temperatures due to heating under no load and the end of the magnetron's lifespan are solved.

Note that 14 indicates a timer axis.

As explained above, the present invention has a structure in which the protrusion is locked with a rotating disc that is linked to the timer while the timer is operating, so the door will not be opened accidentally while the timer is operating, and the high-frequency A heating device can be provided.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a conventional high-frequency heating device with the door open, Fig. 2 is an external perspective view of a high-frequency heating device that is an embodiment of the present invention, and Fig. 3 is a safety view of the main parts. In the perspective view of the device, a shows the state in which the timer is off and the door is open, and b
indicates the timer is on and the door is closed. 2... Heating chamber, 3... Door, 4...
...Handle, 5...Door key, 9...
...Opening hole, 10...Timer, 11...
Projection, 12... Insertion port, 13... Rotating disk, 14... Timer shaft.

Claims (1)

[Scope of utility model registration request] A door is provided at the front opening of the heating chamber so that it can be opened and closed freely, and a door key and a protrusion having a protrusion at the tip are provided on the back side or periphery of the door, and a timer for setting the time is provided on the side of the main body opposite to this protrusion. When off, a disc with a notch facing the protrusion of the above protrusion is provided, and this disc is linked to a timer for setting the time, and during normal use, this disc and the protrusion are in a non-contact state, and the timer A high-frequency heating device that allows the door to be opened and closed only when it is off.