JPS5913759Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a high-frequency heating device that does not apply a shock due to the sudden attraction of a magnet to an object to be heated placed on a rotary mounting table when heating starts.

Conventionally, in a high-frequency heating device in which a rotary mounting table in a heating chamber is rotated by a magnetic coupling means, the same number of magnets are arranged on the rotary mounting table and the driving rotary body facing it, and the magnets are attracted to each other and magnetically connected. They were combined to rotate the rotary mounting table.

In addition, the number of magnets is generally three sets in consideration of cost, assembly man-hours, ease of cleaning, etc.

However, because the spacing between the magnets is wide, if the device is installed with the magnets of the rotary mounting table and the magnets of the driving rotor out of alignment, they will not be sufficiently attracted by the friction resistance of the rotating shaft of the rotary mounting table. It may be somewhere in between.

When an object to be heated is placed on such a rotary mounting table and a cooking button is pressed, the driving rotary body starts rotating and the magnets approach each other, and are eventually attracted and coupled.

At the time of coupling, the attractive force of the magnet suddenly increases, causing a large shock to the rotary mounting table, and when the object to be heated is a liquid such as coffee, there are drawbacks such as spillage.

This invention eliminates the drawbacks of the conventional method, and the magnets provided on the rotary mounting table and the driving rotary body ensure that even if the driving rotary body is stopped at an arbitrary position, both magnets are always connected to each other. It is an object of the present invention to provide a high-frequency heating device that eliminates coupling shock given to a rotating mounting table due to sudden mutual coupling of both magnets when a driving rotating body stops and starts rotating.

This idea will be explained based on the drawings.

Fig. 1 is a perspective view of the high-frequency heating device of this invention with the door open, Fig. 2 is an internal sectional view of the device, Fig. 3 is a diagram of the arrangement of the magnets on the rotary mounting table, and Fig. 4 is a diagram of the drive rotating body. The magnet arrangement diagrams are shown respectively.

In the figure, 1 is a high-frequency heating device main body, and this high-frequency heating device main body 1 includes a heating chamber 2 for storing an object to be heated and a microwave generator 3 for supplying microwaves into the heating chamber 2. There is.

Reference numeral 4 denotes a door that can be opened and closed at the front opening of the heating chamber 2, and a screen 5 and a handle 6 are attached to the door 4 in order to view the heating state of the object to be heated in the heating chamber 2.

Reference numeral 7 denotes an operation panel disposed on the front surface of the main body 1 of the high-frequency heating device, on which knobs of a control section for controlling the microwave generator 3 are disposed.

Reference numeral 8 denotes a rotary mounting table which is detachably and rotatably disposed in a recess 9 provided on the inner bottom surface of the heating chamber 2; A concave groove 11 is formed in which a ring 10b of an annular support body 10 that is freely supported is disposed, and a seal plate 12 such as an iron plate is provided on the back surface.
Three spacers 14, which are magnetically shielded and held in a storage container 13, are arranged at equal intervals on the same circumference.

Reference numeral 15 denotes a pull-out stop that protrudes from the side surface of the storage container 13 toward the groove 11, and the support body 10 is held by this pull-out stop 15.

The support body 10 is composed of a ring body 10a and a removable wheel 10b which is rotatably supported at key points of the ring body 10a.

The groove 11 is formed by drawing the peripheral edge of the upper plate of the rotary mounting table 8 upward, and the vertical side plate 11a forming the groove 11 is used to connect the wheels 10 of the support 10.
This prevents b from coming off.

Reference numeral 16 denotes a drive rotary body that is rotatably supported by being loosely fitted to a support shaft 17 fixed by welding to the approximate center of the outer bottom plate of the recess 9 of the heating chamber 2. A magnet 18 of opposite polarity that is coupled with the magnet 14 attached to the mounting base 8 by an attractive force is attached to the drive rotary body 1 one step below the magnet 14.
Six wheels 19 are disposed at equal intervals on the same circumference of the drive rotary body 16, and six wheels 19 are disposed to support the periphery of the driving rotary body 16.

Reference numeral 20 denotes a motor for rotating the driving rotary body 16. A pulley 21 is fixed to the rotating shaft of this motor 20, and the pulley 21 and the driving rotary body 16 are connected by a belt 22.

23 is a stirrer fan that stirs the microwave radio waves supplied from the microwave generator 3, and 24 is a partition plate that protects the stirrer fan 23.

Next, the operation of this invented device will be explained.

By rotationally driving the motor 20, the rotational driving force is transmitted to the driving rotating body 16 via the belt 22, and the driving rotating body 16 rotates around the support shaft 17, and the driving rotating body 1
The magnet 18 disposed at 6 also rotates, whereby the rotary mounting table 8 rotates together with the magnet 14 that is magnetically coupled thereto.

As mentioned above, in this invention, the magnets on the driving rotor side are arranged twice as many as the magnets on the rotary mounting table side, so that both magnets do not become uncoupled, and the rotating mounting table is protected from sudden shocks at the beginning of rotation. Never give up.

In the above description, the driving rotary body is provided with twice as many magnets as the number of magnets on the rotary mounting table.

However, the number of magnets can be an integral multiple of twice or more the number of magnets on the rotary mounting table.

If the purpose is only to keep both magnets in a non-coupled state at all times, the rotary mounting table may be provided in the opposite manner.

(1) Even if the rotary mounting table is unintentionally installed in the heating chamber, the magnets on the driving rotor side are closely arranged, so that the attraction and connection can always be achieved with one of the magnets.

Therefore, the rotary mounting table does not move suddenly after storing the object to be heated, and there is no fear that the object to be cooked will spill, making it extremely convenient to use.

In addition, since the magnets on the driving rotor side are multiplied by an integral number, the magnetic coupling force is always constant no matter where the attraction coupling occurs.

(2) Naturally, the same effect as this invention can be obtained by increasing the number of magnets in both the rotating mounting table and the drive rotating body, but according to this invention, the rotating body, that is, the part hidden inside the main body of the high-frequency heating device. Since only the number of magnets required is increased, there is less leakage of magnetism when the rotary mounting table is taken out for cleaning, and there is less negative impact on the watch.In addition, cleaning is easy because there are few irregularities on the rotary mounting table.

[Brief explanation of the drawing]

Figure 1 is an external perspective view of the high-frequency heating device of this invention, Figure 2
The figure shows a sectional view of the internal structure of the device, FIG. 3 shows the magnet arrangement of the rotary mounting table, and FIG. 4 shows the magnet arrangement of the drive rotary body. 1: High frequency heating device body, 3: Microwave generator, 8
: Rotating mounting table, 10: Annular support, 10b: Wheel, 1
2: Shield plate, 14: Magnet, 16: Drive rotating body, 17
: Support shaft, 18: Magnet, 19: Wheel, 20: Motor, 2
1: Pulley, 22: Belt.

Claims (1)

[Scope of utility model registration request] A removable and rotatable rotary mounting table having a plurality of magnets equidistantly spaced on substantially the same circumference is provided on the bottom surface of the heating chamber, and a plurality of magnets having a polarity opposite to the magnets of the rotary mounting table are provided outside the bottom surface of the heating chamber. In a high-frequency heating device including a driving rotor that rotates concentrically with the rotary mounting table, magnets with the number of magnets 2N (N is a positive integer) times the number of magnets on the rotary mounting table are arranged in substantially the same manner. A high-frequency heating device characterized in that the high-frequency heating device is arranged on a driving rotating body at equal intervals on the circumference.