JPS6030212B2 - automatic rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention is applicable to electric rice cooking, so-called "additional cooking" or "
This invention relates to an electric rice cooker that can automatically perform a rice cooking method called "double-blow rice cooking."

．． ``Additional cooking'' in a rice cooker means that when the water at the bottom of the rice cooker is absorbed into the rice and the temperature at the bottom of the pot rises, the heat-responsive switch is turned off and the power to the rice cooking heater is temporarily stopped, mainly controlling the temperature at the bottom of the pot. When the rice has fallen a little, the rice heater is energized again and the rice is reheated. According to this method, the water that has adhered around the rice grains is evaporated or absorbed into the rice by reheating, improving the flavor and texture. ,
It has been confirmed that the taste is improved, and delicious rice can be cooked.

However, conventional rice cookers do not function as automatic appliances because they have to wait until the right time and manually turn on the rice cooker again in order to start cooking. Additionally, devices that use microcomputers or sequence circuits to perform this operation have the drawbacks of malfunctioning due to noise or temporary power outages, and are impractical because they are expensive compared to their functionality. The present invention aims to eliminate the drawbacks of the conventional rice cooker, eliminate malfunctions, operate almost the same as the conventional rice cooker, and provide an inexpensive automatic rice cooker.

The present invention will be explained based on the drawings.

Fig. 1 is an electric circuit diagram of the present invention, Fig. 3 is a perspective view of the additional cooking mechanism of the automatic rice cooker of the invention, Fig. 4 is an exploded perspective view of parts, and Fig. 5 is a partially sectional side view. , is shown.

In the figure, F is the frame body, F-1 is the horizontal part, F-
2 is the [(window front) shaped part, F-3 is the step part, F-4 is the vertical part, 1 is the heater, 2 and 3 are the switches, 4 is the solenoid, 5 is the timer, and 6 is the thermal response detector. A certain center thermo, 6-- is a fixed magnetic body, 6-2 is a movable magnetic body, 6-3 is a spring, 6-4 is a case, 6-5 is a support column for the movable magnetic body 6-2, and 6-6 is described later. 7 is the reheating button, 8 is the reheating lever fixed to the reheating button 7, 9 is the horizontal part 9-1 and the vertical part 9-2.
10-1 is a connecting part, 10-2 is a switch holding plate of switch 2, 10-3 is a [shaped end part, 10-4 Shape end 1
0-3 side plate, 10-6 T-shaped engagement part, 10-7 notch groove, 11 presser plate hook lever, 12 claw provided on the lower horizontal side plate of presser plate hook lever 11, 1
3 and 14 are the actuators of the switches 2 and 3, 15 is the plunger, 16 is the plunger lever, 17 is the rice cooking button, 18 is the rice cooking lever, i8-3 is the rice cooking lever pawl, 20
indicates a protective frame and a fixed shaft 30.

The reheating mechanism of the present invention includes a reheating member consisting of a reheating button 7 and a reheating lever 8, a second press plate member consisting of a switch press plate 9 and a switch press plate fixing plate 29, a center thermolever 10, and a plate. A center thermolever member consisting of a shaped spring PS and a presser plate hooking lever 11, a rice cooking button member consisting of a rice cooking button 17 and a rice cooking lever 18, a plunger section consisting of a solenoid 4, a plunger 15 and a plunger lever 16, and It consists of a frame body F.

The reheating lever 8 of the reheating button part has a U-shaped fixed shaft 30 in the center, a rotation support part 8-2 with an insertion hole B, an inclined side 8-1 at the rear, and a hook parallel to the base at the top of the vertical side plate. A joining part 8-3 is provided.

L sideways to the connecting part 10-1 of the center thermolever 10.
A shaped switch presser plate 10-2 is integrally provided, and an inclined surface is provided at the center of the connecting portion 10-1 to fix the "F" shaped spring PS. [T-shaped engagement part 10 at the tip in the center part of the shaped end part 10-3
-6 is integrally provided, and the concave engaging portion 11-1 provided at the tip of the presser plate hooking lever 11 is engaged with the T-shaped engaging portion 10-6. Place it in contact with the top of the The presser plate hooking lever 11 has a vertical connection part 11.
12 and a horizontal side plate 11-3 extending horizontally at the bottom, a claw 12 at the center, and a flat engagement part 11-4 at the tip, and a vertical connecting part 11-2 connected to the notch groove 10 of the center thermolever 10.
-7. A leaf spring 2 is fixed to the switch holding plate on the inner surface of the side surface 10-4 of the center thermolever 10.
At the same time, one end of the vertical part 9-2 of the switch holding plate 9 is fixed to the other bent part, and the rear end of the horizontal part 9 is attached to the horizontal side plate of the holding plate hooking lever 11. Position it beyond 11-3. The rice-cooking button member fixes one end of the rice-cooking lever 18 to the rice-cooking button 17 and is bent to form a slope portion 18-1, and a U-shaped fixed shaft 30 and a rotation support portion 18-2 having an insertion hole D are provided at the lower part. A claw 18-3 is provided on one side of the slope portion 18--.

The plunger member has a plunger 15 inserted into the center hole 4-2 of the solenoid 4 provided in the case 4-l, and an upper engaging portion 16-1 in the form of a plunger lever 16.
A concave groove 15- with one end provided in the upper part of the plunger 15.
1 and fix both with pins 40. Upper engaging part 1
A columnar portion 16-2 having an angled cross section and extending downward is provided below the columnar portion 6--. Plunger part is frame body F
The solenoid 4 and the plunger 15 are arranged on the outside and the columnar part 16-2 is arranged on the inside in the vertical part F-4 of the
is fixed to the vertical part F-4 with screws 50. Vertical part F-4
There is a groove that projects vertically from front to back and allows the engaging portion 16-1 to move up and down, a guide portion G on the inner surface of the vertical portion F-4, and an angled columnar portion 16-1 on the stepped portion F-3. 2 is provided with a through groove K through which it can be freely inserted and removed. Plunger lever 16
With the engaging portion 16-1 in the groove, one columnar portion 16-2A of the columnar portions 16-2 is inserted into the guide G, and the columnar portion 16-2 is inserted into the through groove K, and the plunger member is inserted into the frame body. Attach F'ko. Furthermore, a hole 16 is provided at the top of the plunger lever 16.
13. A hole L is formed in the vertical portion F-4, and the end of the spring 60 is inserted and fixed between the two holes to bias the plunger 15 so that it is always positioned upward. The parallelizers 2 and 3 are fixed to the inner surface of the horizontal portion F-1. [
The fixed shaft 30 is inserted into the shaped portion F-2 in the order of insertion holes A, B, C, and D, and is assembled and configured to be rotatable as shown in FIG. 3. Next, the operation of the automatic rice cooker of the present invention will be explained.

In FIG. 1, the switches 2 and 3 are opened and closed by a center thermostat 6 (FIGS. 5 to 12) that utilizes the Curie point of a magnetic material that operates by contacting the bottom of the pot and detecting the temperature of the bottom of the pot.
First, press the additional cooking button 7 to set it and turn on the switch 2.
3 closes and the rice cooking heater is energized and starts cooking rice.

When the rice is cooked, the temperature at the bottom of the pot rises, indicating the relationship between time and temperature inside the pot. When the temperature A shown in FIG. 2 is reached, the center thermostat 6 operates to open only the switch 2. At this point, the power to the rice cooking heater stops, and the temperature of the rice begins to drop. Further, when the switch 2 is opened, a voltage is applied to the timer 5, and the timer starts operating. A certain period of time T (1~
After one cycle), the solenoid 4 is activated at point B to return the center thermostat 6 to the rice cooking state, and the switch 2 is opened. From here, the temperature of the rice rises again, and when the bottom temperature of the pot reaches point C, the center thermo 6 operates again, and at this time, the switch 2 is opened, and at the same time, the switch 3 is also opened, and from then on, the timer 5 does not work and the additional cooking process is completed. Next, the switches 2 and 3 of the additional cooking mechanism of the present invention
I will explain the operating mechanism of 'l by following the counterfeit.

When the reheating button 7 is pressed from the state where all the switches are off (Fig. 5), the state shown in Fig. 6 is reached.

When the additional cooking button 7 is pressed, the additional cooking lever 8 moves to the fixed shaft 3.
0, the inclined side 8-1 rises, and the opening/closing press plate 9
The switch presser plate fixing leaf spring 29 is rotated around the bent part and lifted up, and the center thermo lever 10 is also raised, and the support column 6-5 of the center thermo 6, which is engaged at the tip, is moved from the spring 6-3. The movable magnetic body 6-2 and the fixed magnetic body 6-1 are pushed up against the force, and this state is maintained, and the center thermostat 6 is set. In addition, the switch holding plate 9
In the rotated state as shown in FIG. 6, one end 11-1 is engaged with the T-shaped engaging portion 10-6 and caught on the claw 12 of the holding plate hooking lever, which is biased upward by the spring PS. It is held beyond the claw 12 and located on the left side in the figure. In this state, the switch presser plate 9 and the switch presser plate 10-2 of the center thermolever 10 of the switch 3 are separated from the respective actuators 14 and 13 of the switch 2, and both switches 3 and 2 are closed. will be accomplished.

A plate spring P provided in the groove of the rotary support part 8-2 returns to its original state when the reheating button 7 is released, as shown in FIG.
When the heater is energized and the bottom temperature of the pot rises, the center thermostat 6 is activated and the center thermolever 10 is lowered as shown in FIG. 8, pushing the actuator 13 and opening the switch 2.

At this time, the presser plate 9 held by the claw 12 escapes from the actuator 14 as shown in FIG. 7, so the switch 3 remains closed. From this point on, the timer 5 is activated, and after a certain period of time, the solenoid 4 is activated at point B in FIG. 2, and the plunger lever 16 is lowered by retracting the plunger 15. Since the thermo lever 10 is pushed down, the 9th
As shown in the figure, the center thermostat 6 is set and the switch 2 is closed.

Since the plunger lever 16 further descends and pushes the presser plate hooking lever 11, the presser plate 9 is disengaged from the claw 12 as shown in FIG. 10, resulting in the state shown in FIG. 11. Since the switch 2 is closed, the heater 1 is energized and the temperature inside the pot rises again. When reaching point C in Figure 2, the center thermostat 6 is activated, and when the center thermolever 10 is lowered, switches 2 and 3 are opened as shown in Figure 5, which completes all operations. . In re-cooking, the rice is heated twice, which causes the bottom of the pot to become scorched, which imparts a fragrant aroma to the rice, making it even more delicious.

However, some people do not like burnt rice depending on their taste, so if you want to cook rice normally without burning, press the rice cooking button 17 and the rice cooking lever claw 18 will move to the presser plate hook lever 1.
Since the center thermo lever 10 is pushed down through the center thermo lever 10 through the presser plate 9, the center thermo lever 10 rises without being caught by the claw 12, the center thermo lever 10 is set, and rice cooking begins, but the presser plate 9 is not caught by the claw 12. Therefore, when the temperature rises and the center thermostat 6 is activated, both the switches 2 and 3 are opened, and the energization ends at one degree. Furthermore, after setting the additional cooking button 7, if for some reason you want to stop the electricity supply, raise the additional cooking button 7 upwards, and the additional cooking lever 8 will be lowered as shown in Fig. 12, and the presser plate hook lever 11 is pushed down, the presser plate 9 is unhooked, and the center thermolever 10 is also removed, so the switches 2 and 3 can be opened and all energization can be stopped.

[Brief explanation of drawings]

Figure 1 is an electric circuit diagram of the present invention, Figure 2 is a temperature curve inside the pot of a rice cooker, Figure 3 is a rice cooker mechanism of the present invention, Figure A is a perspective view, and the mouth view is a rice cooker button and rice cooker. FIG. 4 is a perspective view of the button mounting part, FIG. 4 is an exploded perspective view of the parts, FIG. Figure 7 shows the center thermo 6 set, Figure 7 shows the reheating button restored, Figure 8 shows the center thermo 6 activated at temperature point A, Figure 9 shows the timer working and the solenoid activated at temperature B. The first diagram shows the operation of
Figure 0 is a diagram just before the presser plate 9 is removed from the pawl 12 by the plunger lever, Figure 11 is a diagram with the presser plate 9 removed from the pawl 12 and the center thermostat 6 is set, and Figure 12 is when the power is turned on after the reheating mechanism. The figure shows the stopped state. 1: Heater, 2, 3: 1st "2nd switch, 4: Solenoid" 5: Timer, 6: Heat-resistance detector, F: Frame body, 7, 8: Additional heating section, 9, 29: Second switch holding plate member, 10, PS, 11: Center thermolever member, 4, 15, 16: Plunger section, 11-3:
Horizontal side plate of presser plate hooking lever, 12: Second switch presser plate relief claw, 17, 18: Rice cooking member, 18-3: claw. Figure 1 Figure 2 Figure 3 Figure 5 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] 1 Connect the power supply, heater and first switch in series,
A second switch circuit consisting of a solenoid circuit consisting of a timer and a solenoid 4 operated by the timer and a second switch connected in series is connected in parallel to the first switch circuit to provide a heater circuit. A heat-responsive detector is provided, and a reheating member, a center thermolever member including a first switch holding plate and a second switch holding plate, and a rice cooking member are arranged side by side on a rotating shaft provided in the frame body, and rotate. A plunger member is attached to a vertical portion that is freely mounted on the frame body, and one end of the center thermo lever of the center thermo member is connected to the thermal response detector, and the The first switch and the second switch are fixed, and the first and second switch press plates are configured to always open the first and second switches, and one end is attached to the upper surface of the center thermo lever. A presser plate hooking lever is provided which rotatably engages with the tip of the thermolever and has a horizontal side plate having a relief claw for the second switch presser plate, and the second switch presser plate is attached to the center thermolever. The sensor is placed on a horizontal side plate that can be rotated and has the relief pawl, and the reheating member is pushed down to set the thermally responsive detector via the center thermo member, and the pawl 12
the second switch presser plate is released, the first and second switches are closed, the heater is energized to heat the pot, the thermal response detector is activated at a predetermined temperature of the pot, and the first switch is closed. The timer is activated at the same time as the switch is opened to stop the energization of the heater, and after a predetermined time, the solenoid is activated, the first operation of the plunger sets the thermal response detector, and the second operation causes the second opening/closing. The rice cooker plate is returned to its original position, the heat-responsive detector is activated again at a predetermined temperature of the increased temperature, and the first and second switches are opened to allow additional cooking, and the rice cooking member is activated at any time. An electric rice cooker that can release the operation of the second switch.