JPS6138331A - Heating cooker with weight detecting function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cooking device that measures the weight of an object to be heated and can automatically calculate heating output, pattern, and time according to the weight. .

Conventional configuration and its problems FIG. 1 shows an example of a conventional heating cooker.

Reference numeral 1 denotes a door that can be opened and closed for spinning the object to be heated 3 . The object to be heated 3 is placed on a rotating plate 10 and heated by high frequency energy supplied from the magnetron 4 into the heating chamber 2 via the waveguide 6 . During heating, rotating mounting table 9
transfers the force of motor 8 to gear A6. The object to be heated placed on the rotary plate 1o is uniformly heated by receiving the heat through the gear "B7" and rotating.

The rotary mounting table 9 is supported by a shaft 11, and the shaft 11 is supported by a shaft support 12 and a block B13 so as to be freely movable in the rotational direction. Further, the shaft 11 is connected to the gear BT and is driven to rotate at the same time. 14 is a motor fixing plate that fixes the motor 8, and one end of the plate spring 16 and the magnet holder 9 are attached to the plate 1.
9 and the shaft support 12, it is fixed to the block B13 and has a free end that can freely vibrate vertically. Further, the other end of the leaf spring 15 is also fixed to the saw saw A16.
It constitutes a pallet mechanism and is further attached to a spring fixing plate 19 installed at the bottom of the bunrot, forming a fixed end.

The heated object 3 is placed on the rotary plate 10 by the action of the roba-hull mechanism.
When placed, it vibrates while being attenuated at a frequency corresponding to the weight of the object to be heated 3, and comes to rest at a position balanced with the plate spring 15. A magnet 18 connected to the free end of the donkey pal mechanism produces similar vibrations. Therefore, in the coil 17 fixed to the fixed end of the donkey-pal mechanism, an induced electromotive force having the same period and out of phase with the vibration of the magnet 18 is generated. The weight is determined based on the difference in frequency.

Here, when an excessively large object to be heated is placed, the displacement of the donkey pal mechanism becomes large, and the free end contacts the removable inspection window 21 for repair and inspection.
There is no touch or vibration, but...
The inspection window 21 has multiple punched holes for cooling, and is easily deflected by external force, acting as an elastic body with a certain elastic constant against the donkey pal mechanism that comes into contact with it, and acting as a donkey that corresponds to the actual object to be heated. - The frequency unique to the Pal mechanism causes vibrations that are very different from each other, causing erroneous weight measurements. This can also occur if the bottom of the body is touched.

On the other hand, with regard to the donkey pal mechanism, excessive weight may cause the phenomenon of buckling of the leaf spring.

As shown in Figure 2(a), the force f is applied to the upper leaf spring of the donkey pal mechanism as a tensile force, and the force f is applied as a compressive force to the lower leaf spring, establishing the relationship f-W-. If the object's center of gravity is at the end of the platform, a very large force is applied to the donkey pal mechanism, causing it to buckle.

There is also a high possibility that buckling may occur due to artificial force being applied from outside. As shown in FIG. 2(b), the elastic constant of the buckled spring changes and it will not return to the state before buckling. Therefore, the correlation between weight and frequency also changes, causing erroneous measurements.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and provides a device with excellent durability and reliability, which prevents damage to the spring due to excessive weight and deformation due to contact of the donkey pal mechanism such as the two inspection windows at the bottom of the main body. The purpose is to achieve accurate weight measurement.

Structure of the Invention In order to achieve the above object, the heat cooking device with a weight detection function according to the present invention prevents the heating object and the elastic body from being removed by a restraining device when an object to be heated exceeding a predetermined weight is placed on the mounting table. The mounting table is configured to integrally support the mounting table, and as a result, the mounting table does not come in contact with anything other than the restraining device, which eliminates the problem of deformation of the contacted part and has the effect of reducing damage to the elastic body. It is.

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

FIG. 3 is a partial cross-sectional view from the side of the high-frequency heating device according to the present invention. Moreover, FIG. 4 is a partial sectional view from the front.

In FIG. 3, a door 1 is provided at the front of the heating chamber 2 so as to be openable and closable. A magnetron (not shown) is installed in the heating chamber 2.
A high frequency wave is oscillated from the source and heats the object 3 to be heated. The object to be heated 3 is placed on the rotating plate 1o. Rotating mounting table 9 has opening 2
The motor 8 is connected to the motor 8 through a gear B7 fixed to the shaft 11 and driven simultaneously, and a gear A6 connected to the motor 8.
Rotationally driven. The shaft 11 is held by a shaft support 12 and a block B13, and is configured to be smoothly rotatable. A motor fixing plate 14 for fixing the motor 8 is integrally coupled with a block B13 and a plurality of leaf springs 15, and the other end of the leaf spring is coupled with a block A16 to form a donkey pal mechanism. Further, the block A16 is attached to a spring fixing member 19 firmly fixed to the bottom surface of the orb. Therefore, one end of the donkey pal mechanism, which is integrated with the motor 82 and the rotating mounting table 9, becomes a free end and is elastically movable vertically and vertically. The magnet 18 is fixed to the free end of the donkey pal mechanism by a plate 2o, and moves in the same direction as the free end, and a detection coil 1.gamma. is provided opposite to the magnet 18. Due to the action of the O bar pal mechanism, the magnet 18 attached to the free end of the white bar pal mechanism moves downward as the weight of the object to be heated 3 increases. Below the free end of the donkey pal mechanism,
A restraining plate 22 made of a thick metal plate capable of withstanding excessive weight and having a surface perpendicular to the thrust direction of the shaft 11 is firmly fixed to the bottom of the heating chamber.

The operation of the above configuration will be explained below.

As the weight of the object to be heated increases, the free end of the donkey pal mechanism moves downward and eventually comes into contact with the restraining plate 22.

Furthermore, even if the weight of the object to be heated increases, the free end of the roba-hull mechanism is supported by the restraining plate 22, so the movable range of the shaft 11 in the thrust direction is limited, and the shaft 11 comes into contact with the inspection window 21 and No more damage to 21 and only one.

On the other hand, the restraining plate 22 is made of a strong metal plate so as to be able to sufficiently withstand excessive weight, and is further strengthened by being fixed to the bottom of the oven.

Restricting the movement area of the spring by the restraining plate 22 has the effect of increasing the buckling strength of the spring. According to Euler's theoretical formula for buckling strength, the buckling strength of a structure in which the free end is supported by a restraining plate and fixed at both ends, as in the present invention, is approximately twice as strong as that of a conventional structure in which one end is fixed and the other end is free. I know.

Therefore, the reliability of the spring can be improved and the characteristics can be maintained.

Furthermore, by forming the restraining plate 22 from a strong material that does not easily bend due to external forces, the reliability of weight measurement is improved.

If a strong restraining plate with no elastic force is provided, even if an excessively heavy heated object is placed and the free end of the donkey pal mechanism comes into contact with the restraining plate, the elasticity of the restraining plate will This solves the problem of affecting the elasticity of the mechanism and causing vibrations at frequencies different from those corresponding to the weight of the object to be heated, resulting in erroneous measurements.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) When an excessively heavy object to be heated is placed on the mounting table or when an artificial force is applied to the mounting table, the restraining device integrally supports the mounting table equipped with an elastic body and limits the drive area. Therefore, damage to the contacted portion due to contact with the driving portion can be prevented.

(2) When an excessively heavy object to be heated is placed on a mounting table equipped with a donkey pal mechanism as an elastic body, or when artificial force is applied, the free end of the donkey pal is supported by a restraining plate. Since the spring is fixed, its strength against buckling is improved, resulting in a highly reliable device.

(3) Since the drive area of the mounting table provided with the elastic body can be restricted by the restraining device, the structure becomes thinner especially with respect to the vertical dimension under the heating chamber, and as a result, the overall structure can be made compact and thin.

(4) The restraint device must be made of a strong material that does not easily deform or bend due to external forces.+77'
l--i 234-zu E tool nz+out±h snoring ζ
Even if the Ku-pal mechanism comes into contact with the restraining device, the elasticity of the restraining device will not affect the elasticity of the Rob-pal mechanism, resulting in incorrect weight measurements, which increases the reliability of the measurement. becomes higher.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing the structure of a conventional high-frequency heating device with a weight detection function, Figure 2 (a) is a schematic diagram showing the force applied parallel to the leaf spring of the donkey pal mechanism, and Figure 2 (b). ) is a side view of the appearance of the buckled donkey pal mechanism, FIG. 3 is a side cross-sectional view of a heat cooker with a weight detection function according to an embodiment of the present invention,
The figure is a front view of the same. 1... Door, 2... Heating chamber, 3... Heated object, 4... Magnetron, 5... Waveguide, 6... Gear A, 7...Gear B, 8...
...Motor, 9...Rotating table, 1o...Rotating plate, 11...Shaft, 12...Shaft support, 1
3... Block B114... Motor fixing plate, 15... Leaf spring, 16... Block A,
17... Coil, 18... Magnet, 19
...-Spring fixing material, 20...Magnet mounting plate,
21...Dianji Temple~22...Suppression 11-board. Figure 1 Figure 2 ICI)

Claims (3)

[Claims] (1) A heating chamber for storing an object to be heated, a heating means for heating the object to be heated, a mounting table for placing the object to be heated, the mounting table, and the object to be heated are integrated. A heat cooker with a weight detection function, comprising: a supporting elastic body; a detection circuit that detects the weight of the object to be heated based on the movement of the elastic body; and a suppressing device that limits a driving range of the elastic body. (2) The heat cooker with a weight detection function according to claim 1, wherein the restraining device is configured to limit the driving range of the mounting table by supporting the object to be heated, the mounting table, and the elastic body. (3) The heat cooking device with a weight detection function according to claim 2, wherein the suppressing device is configured to be fixed to the bottom of the heating chamber.