JPS5933931Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-frequency heating device, and particularly to a latch switch mechanism thereof, and its purpose is to further improve the safety of the high-frequency heating device by operating the latch switch reliably.

Conventional latch switch mechanisms have generally been those shown in FIGS. 1 and 2.

1. In the conventional type, the operating lever 2 connected to the cooking switch 1 is extended by the switch lever 41 of the latch switch 3, as shown in FIG. As shown in the figure, there are 5 holes on the upper surface of the switch lever 4.

Further, as shown in FIG. 2, a door lock key 6 provided on the door 5 so as to be freely retractable is brought into contact with the lower surface of the switch lever 4, and when the cooking switch 1 is pushed in, the latch switch 3 is closed. It is supposed to be done.

That is, when the cooking switch 1 is pushed in, the operating lever 2 moves in the direction of arrow A in FIG. This push-up causes the latch switch 3 to close.

However, such a configuration has the following drawbacks.

As a result, the lever 2 becomes very long as shown in FIG. 1, and therefore the strength at the end of the lever 2 is not very strong.

In other words, the latch switch 3 can be closed by opening the door 5 shown in FIG. This means that it can be done, and such actions have actually been performed.

However, if the latch switch 3 closes while the door 5 is open, it may lead to a very dangerous situation, and in this case, the safety provided by the latch switch 3 is lost. be.

Furthermore, the lever 2 is normally pulled in the opposite direction to the arrow A by a spring or the like, but when the door 5 is intentionally closed by applying an impact force, it moves in the direction of the arrow A due to the reaction of inertia, and the cooking switch 1 There were cases where the latch switch 3 worked without any operation (automatically turned on), and there was no favorable tL<.

In addition, as a result of the operating lever 2 being long, the dimensional error that occurs when assembling the operating lever 2 is considerably expanded at the end of the operating lever 2, resulting in a large dimensional error, thereby ensuring that the latch switch 3 can be opened and closed reliably. There was also the drawback that it was not carried out.

Therefore, the present invention provides a latch switch and a rotating lever on the hook part that locks the door lock key, thereby solving the above-mentioned drawbacks of the conventional door lock.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 3, 8 is an operating lever operated by a cooking switch (not shown) attached to an operating panel (not shown), and the terminal end 8a of this operating lever 8 is approximately 90°
0 It is bent downward.

Further, a door lock key 10 is provided on the door 9 so as to be freely retractable, and a latch switch (not shown) and a rotating lever 12 are provided on a hook portion 11 that locks the door lock key 10 in the hole P. It is being

In the past, the rotary lever 12 was rotatable about a support shaft 13, and was pressed against a stopper S by a spring 14 abutting one end thereof.

Further, a slider 15 made of a resin such as Duracon, which has good sliding properties and less wear, is attached to the other end of the rotating lever 12.

The slider 15 is in contact with the upper surface of the switch lever 16 of the latch switch, and the door lock key 10 is in contact with the lower surface of the switch lever 16.

When the cooking switch is pressed, the operating lever 8 moves to the left in the figure, and as a result, one end of the rotary lever 12 is pressed against the terminal end 8a of the operating lever 8.

In this case, the terminal end 8a and the rotary lever 12 are in point contact, and the rotary lever 12 is provided with a window 12a to avoid surface contact with the terminal end 8a during rotation. It is being

In the above configuration, when the door 9 is closed, the door lock key 10 tries to push up the switch lever 16 of the latch switch as shown in FIG.

However, as shown in the figure, there is a slider 15 on the upper surface of the switch lever 16 facing the door lock key 10.
are in contact with each other, and therefore the switch lever 16 cannot be pushed up any further, so the latch switch does not close.

In this case, the pushing force exerted by the door lock key 10 becomes a force that pushes the rotary lever 12 against the stopper S via the slider 15, so that the switch lever 16 is not pushed up any further.

This also applies when the door 9 is opened and a finger or the like is inserted through the hole P.

As shown in the figure, the second lever 12 is short and strong, and therefore will not be deformed by pushing up force from a finger or the like.

Conversely, press the cooking switch and press the terminal end 8 of the operating lever 8.
When a is moved to the left by a distance l as shown in FIG. 4, the slider 15 of the second lever 12 rotates about 13° (θ1+θ2) from the position shown in FIG. The switch lever 16 is pushed up by the door lock key 10 to close the latch switch.

The old rotary lever 12 is provided at an angle of θ1 toward the operated side with respect to the operating axis of the door lock key 10, so that the pushing force from the door lock key 10 becomes a force pressing against the stopper S (this is not done intentionally with a finger, etc.). The same thing happens when you push the door) Furthermore, it works the same way when the door is closed with an impact.

First, the operating lever 8 acts in the direction of operating the rotating lever 12 due to the reaction of inertia, but is further pressed against the stopper S by the pushing force from the door lock key 10 and the spring force from the spring 14. Because of the force acting on the latch switch, the latch switch cannot be turned on automatically like in the past.In order to obtain the above effect, the larger θ1 is, the better; It is no longer the case that the angle must be the minimum to obtain the above effect.

The results of the experiment suggest that about 5 to 7 degrees is sufficient, although it depends on the setting of the spring force.

In this case, when the operating lever 8 is released from the cooking switch, it returns to the broken line shown in FIG. This is stronger than the lowering force, and therefore, the switch lever 16 is stable in the state shown in FIG. 4, where the door lock key 10 is fully protruded.

As described above, the high-frequency heating device of the present invention is equipped with a latch switch and a rotating lever on the hook, and the cooking button can be operated from any distance using a separate operating lever that operates independently. This is effective when attempting to operate the latch switch, and as described above, automatic turning on of the latch switch as in the conventional example is also prevented.

Therefore, the latch switch closes the door as described above, and will not close unless the cooking switch is further pushed in. Therefore, the safety of the latch switch is further improved, and the cooking button can be separated at any distance, making it impossible to close the door. Reliability can be increased without the need for special designs or mechanisms.

In addition, since the rotary lever that ultimately closes the latch switch is integrated with the latch switch into the hook part, there is almost no dimensional error between the latch switch and the rotary lever that occurs during assembly, and as a result, the latch switch The opening and closing operations are performed reliably.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of the main parts of a conventional high-frequency heating device.
FIG. 3 is a sectional view of a main part of a high-frequency heating device according to an embodiment of the present invention, and FIG. 4 is a sectional view of a main part explaining the operation of the same device. 8... Operation lever, 9... Door, 10... Door lock key, 11... Hook portion, 12... Rotating lever 13... Support shaft, 15... Slider, 16...Switch lever.

Claims (1)

[Scope of utility model registration request] A door, a door lock key provided on the door so as to be freely retractable, a hook portion that locks the door lock key when the door is closed, a latch switch and a rotation lever provided integrally with the hook portion, The latch switch has a control lever that corresponds to one end of the rotary lever and a cooking button that operates the control lever, and the latch switch has a switch lever, and one end of the door lock key corresponds to the bottom surface of the switch lever. and the rotary lever is positioned at an arbitrary angle θ1 toward the operated side with respect to the operating axis of the door lock key by a stopper provided on the door hook.