JP3695034B2 - Combined cooking rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combined cooking rice cooker that cooks rice by heating using both a microwave generated by a magnetron and a high-frequency magnetic field generated from a heating coil.
[0002]
[Prior art]
A conventional high-frequency heating rice cooker has a configuration as disclosed in Japanese Utility Model Publication No. 59-145314. That is, it has a pan for storing rice in the main body, and a lid that includes a metallic protective frame surrounding the side of the pan and covers the upper part of the main body so as to be freely opened and closed. This pan has a heating coil that generates a high-frequency magnetic field at the bottom. Moreover, the cover body has the metal lid bottom which covers the upper surface opening part of the pan which forms a cavity with the said protective frame. The lid is provided with a magnetron for transmitting microwaves. Thus, the microwave transmitted by the magnetron microwaves the cavity, and the heating coil generates a high frequency magnetic field to inductively heat the pan.
[0003]
As described above, the pan is heated by both microwave heating by the microwave transmitted from the magnetron and induction heating by the high frequency magnetic field generated by the heating coil, and can cook rice in a short time.
[0004]
[Problems to be solved by the invention]
The combined heating rice cooker is configured to use microwaves transmitted from the magnetron for rice cooking, and sufficient consideration must be given to radio wave leakage. The composite heating rice cooker having the conventional configuration has a problem that this radio wave leakage is likely to occur when the lid is opened and closed.
[0005]
[Means for Solving the Problems]
The present invention solves the problems of such a conventional configuration, and is configured to drive the magnetron after the lid is closed to the main body by the latch means, and to open the lid after the magnetron is stopped. It is a combined heating rice cooker.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, the microswitch is turned on / off by the differential of the detection lever and the latch lever, and the magnetron is operated by supplying power to the magnetron driving power supply after the lid is completely closed to the main body. It is a safe combined cooking rice cooker that stops the magnetron before the body opens.
[0007]
Furthermore, the rotation axis of the latch lever and the detection lever is made common, the rotation locus of the latch lever and the detection lever is made the same, and the combined heating rice cooker has little wear of the shaft and the like and can prevent malfunction.
[0008]
Furthermore, the latch lever is a composite heating rice cooker that has a push button that receives a spring that urges the latch lever forward, and can be formed thin as a whole and the main body can be made small.
[0009]
According to the second aspect of the present invention, the same number of micro switches are arranged on the left and right sides of the latch lever so that the same force is applied to both sides of the latch lever when the latch lever is rotated, and the latch lever is twisted. It is a combined cooking rice cooker that can avoid abnormalities such as falling and getting caught in the middle.
[0010]
【Example】
Examples of the present invention will be described below. FIG. 1 is a cross-sectional view showing the configuration of the composite heating rice cooker of the present invention.
[0011]
The composite heating rice cooker of the present embodiment is composed of a main body 1 and a lid body 2 that covers an upper portion of the main body 1 so as to be freely opened and closed. In the main body 1, a bottomed cylindrical pan 3 made of magnetic metal using stainless steel or a composite material thereof is detachably stored. The pan 3 is supported by a metal protective frame 4 that surrounds the side and bottom surfaces of the pan 3 in a state in which the pan 3 is stored. That is, the pan 3 has a flange 3a formed on the periphery of the opening portion suspended from the protective frame 4. A heating coil 5 that generates a high-frequency magnetic field and induction-heats the pan 3 is provided at the bottom of the protective frame 4, that is, at the bottom of the pan 3. Further, in the space behind the pan 3, a magnetron 6 for transmitting microwaves, a control means 7 for controlling the operation of the magnetron 6 and the heating coil 5, and a magnetron driving power source 7a constituting a part of the control means 7 are provided. And are arranged. The magnetron 6 includes an antenna 6a that emits a microwave transmitted from the magnetron 6 into the air, and a waveguide 6b that guides the microwave. In addition, the lid 2 has a metallic lid lower 2 a that covers the opening on the upper surface of the pan 3 and the opening on the upper surface of the main body 1 when the lid 2 is closed. That is, the lower lid 2a constitutes a cavity which is a heating space by microwaves transmitted from the magnetron 6 together with the protective frame 4 when the lid 2 is closed. The waveguide 6b guides the microwave to this cavity.
[0012]
Above the protective frame 4, a large number of chalks 4 a in which a part of the protective frame 4 is formed in a box shape are arranged to shield microwaves. The lid 2 is coupled to the protective frame 4 so as to be rotatable upward together with the lower lid 2 a by a hinge 9 provided on the surface of the protective frame 4. Reference numeral 8 denotes an upper frame formed so as to surround the protective frame 4 almost integrally with the protective frame 4.
[0013]
Reference numeral 12 denotes a hook provided on the side facing the hinge 11 substantially integrally with the lower lid 2a, and is adapted to engage with latch means provided on the main body 1. As shown in FIG. 2, the latch means includes a latch lever 13 having a latch claw 14 with which a hook 12 integrally attached to the lower lid 2 a is fitted, and the hook 12 provided behind the latch lever 13. The detection lever 16 integrally formed with the sensing portion 15 to be pressed by the set, and the micro switch 17 driven by the differential between the detection lever 16 and the latch lever 13 are configured.
[0014]
The operation of this embodiment will be described below. When the user presses a rice cooking button (not shown) to start cooking, the control means 7 starts to operate. That is, the magnetron 6 and the heating coil 5 operate. When the magnetron 6 is operated, a microwave is transmitted. This microwave is guided to the cavity by the waveguide 6b and heats the cooked rice accommodated in the pan 3 disposed in the cavity. This microwave heating is performed mainly on the surface portion of the pan 3, that is, centering on the water surface. When the predetermined time elapses in this way, the control means 7 energizes the heating coil 5 with a high frequency current. When the high frequency current is applied, the heating coil 5 generates a high frequency magnetic field. This high frequency magnetic field is linked to the pan 3 and the entire pan 3 is induction-heated. Thus, the cooked rice is convected by the heat generated by the pan 3, and the whole cooked rice is heated. By using both microwave heating by the magnetron 6 and induction heating by the heating coil 5, rice cooking is completed in a short time.
[0015]
At this time, according to the present embodiment, as shown in FIG. 3, the power supply 22 is supplied to the magnetron drive power supply 7a after the microswitch 17 is turned on, the control means 7 is operated, and the magnetron 6 is turned into the microwave. Calling is started. The microswitch 17 is driven by the differential between the detection lever 16 and the latch lever 13. This differential operation will be described below.
[0016]
When the user closes the lid 2, the hook 12 integrally attached to the lower lid 2 a engages with the latch means provided in the main body 1. FIG. 4 shows a state in which this engagement is completed. The hook 12 descending from the upper part is locked by the latch claw 14, and at the same time, the sensing portion 15 of the detection lever 16 is pushed by a part of the hook 12 to latch. A differential is generated between the lever 13 and the detection lever 16. Along with the rotation of the detection lever 16, the switch rod 20 provided integrally with the detection lever 16 moves, and the micro switch 17 provided integrally with the latch lever 13 is turned on or off. At the same time, the latch lever 13 and the micro switch 17 that rotates substantially integrally come into contact with each other by the differential, and the micro switch 17 is turned on or off. That is, if the microswitch 17 is a normally open type, the circuit is closed by being pressed, and the circuit is opened by being released. The normally closed type is a circuit that opens when pressed and closes when released. That is, after the user completely closes the lid 2, the magnetron 6 operates to transmit microwaves.
[0017]
Moreover, when a user complete | finishes a rice cooking process and opens the cover body 2, the push button 13b is pushed. The push button 13b is provided integrally with the latch lever 13 at a substantially central portion of the latch lever 13, and a part of the main body 1 is cut out so that the push button 13b can be operated from the outside of the main body 1. The structure is exposed to the outside. When the push button 13b is pushed, the spring 18 that urges the latch lever provided in the push button 13b forward is pushed, and the latch lever 13 rotates about the latch lever shaft 13a. By this rotation, the hook 12 engaged by the latch claw 14 is released. Before the hook 12 is released, the micro switch 17 provided integrally with the latch lever 13 is rotated to come into contact with the switch bar 20 and turn off. That is, before opening the lid 2, the magnetron 6 finishes its operation and stops the transmission of microwaves.
[0018]
In this embodiment, as shown in FIGS. 2 and 4, the latch lever shaft 13a for rotating the latch lever 13 and the detection lever shaft 16a for rotating the detection lever 16 are provided coaxially. It is what. Therefore, for example, when the push button 13b formed integrally with the latch lever 13 is pressed to open the lid 2, or when the lid 2 is closed, the hook 12 constitutes a latch means of the main body 1. Even when engaged with the lever 13, it is rotated by the same rotation axis. For this reason, no extra force is generated on the shaft or the like, so that the wear is small and it is possible to prevent the occurrence of malfunction.
[0019]
At this time, in the present embodiment, as shown in FIG. 5, the sensing section 15 is smaller than the planar shape of the latch claw 14 and has a shape protruding through the lower side of the latch claw 14. is there. That is, the sensible part 15 protrudes from the hole 14 a provided under the latch claw 14. The hole 14a is set to be slightly smaller than the width of the latch claw 14, and a vertical groove 14b is formed in the central portion in the downward direction, that is, in the direction opposite to the latch claw 14. In addition, a vertical rib 15b that fits in the vertical groove 14b is provided on the lower surface of the Satoshi section 15. The vertical ribs 15b serve to guide the moving direction and reinforce the strength of the sensing part 15 when moved by being pushed by the hooks 12 descending from above.
[0020]
By configuring as described above, that is, by forming the sensing portion 15 of the detection lever 16 under the latch claw 14 of the latch lever 13, it is assumed that a foreign object such as a rod is inserted from the outside of the main body 1. However, since the latch lever 13 first rotates against the latch claw 14 of the latch lever 13, the microswitch 17 is pushed by the switch rod 20 and the circuit is turned off. That is, the magnetron 6 does not cause microwave transmission, and safety is improved.
[0021]
In the present embodiment, only one micro switch 17 is used as shown in FIG. 2, but one micro switch 17 is arranged on each of the left and right sides of the latch lever 13 to form a circuit configuration as shown in FIG. It is also possible. That is, the microswitch 17 turns on and off the entire circuit, and the microswitch 22 turns on and off the control means 7. FIG. 7 is an explanatory diagram illustrating a configuration in which one micro switch is arranged on each of the left and right sides of the latch lever 13. Reference numerals 17 and 22 denote two micro switches provided on the subject with the push button 13b as the center. A switch rod 20 is provided on the latch lever 13 immediately below the microswitches 17 and 22 to drive the respective microswitches.
[0022]
In this embodiment, one micro switch is arranged on each of the left and right sides of the latch lever 13. However, the number of micro switches is not limited to one, and in short, the same number of micro switches may be arranged on the left and right of the latch lever 13. The object of the invention can be achieved.
[0023]
As described above, since the switch rod 20, the micro switch 17, and the micro switch 22 are provided as targets, the latch lever 13 is not twisted due to a counter load, and a stable operation can be expected. It is. Further, for example, when the micro switch 22 is turned on after the micro switch 17 is turned on and the micro switch 17 is turned off after the micro switch 22 is turned off, the terminals of the micro switch 17 are welded. Even in this case, since the microswitch 22 is present, there is no possibility that the circuit is short-circuited, and a highly safe circuit configuration can be realized.
[0024]
Further, according to the present embodiment, as shown in FIG. 2, the latch lever 13 is configured to integrally include a push button 13b that receives a spring 18 that biases the latch lever 13 forward. For this reason, the spring 18 can be arrange | positioned in the push button 13b, and the whole can be formed thinly. Therefore, the main body 1 can be formed small.
[0025]
Further, according to the present embodiment, as shown in FIG. 5 and FIG. 7, the knowledge section 15 has a structure having the vertical ribs 15 b below. For this reason, the intelligent section 15 is reinforced by the vertical ribs 15b, and at the same time, the operation of the intelligent section 15 is guided by the vertical ribs 15b and can perform a stable detection operation.
[0026]
At this time, the main body 1 is provided with a hook insertion port 24 for receiving the hook 12 inserted into the main body 1 when the lid 2 is closed to the main body 1 as shown in FIG. The hook insertion port 24 has a shape that is divided in the width direction to improve the strength. Further, the movement of the lid body 2 in the lateral direction is guided to prevent positional displacement.
[0027]
【The invention's effect】
The invention described in claim 1 includes a bottomed cylindrical metal pan that is detachably accommodated in the main body, a lid that covers the upper surface opening of the main body so as to be openable and closable, and a lower surface of the lid. A metal lid that covers the upper opening of the pan, a protective frame made of a conductive material that supports the pan, a heating coil that induction-heats the pan provided in the protective frame, and a microwave is transmitted. A magnetron for heating the food in the pan, a magnetron drive power source for driving the magnetron, a micro switch for turning on / off the power supply to the magnetron drive power source, and closing the lid on the main body before turning on the micro switch And a latch means for turning off the microswitch before the lid is opened, the latch means comprising a latch claw with which a hook integrally attached to the bottom of the lid is fitted, and a latch lever It is composed of a detection lever that is integrally formed with a sensing part that is pushed by the hook set provided at the rear, and the lid is opened after the lid is closed to the main body and then the magnetron is driven. A safe combined heating rice cooker is realized.
[0028]
In addition, as a configuration with a common rotation shaft for the latch lever and the detection lever, a combined heating rice cooker that has the same rotation trajectory for the latch lever and the detection lever, has little wear on the shaft, etc., and can prevent malfunctions. It is realized.
[0029]
Furthermore, the latch lever can be realized as a structure that integrally has a push button that receives a spring that urges the latch lever forward, so that a composite heating rice cooker that can be thinly formed as a whole and whose main body can be made small can be realized.
[0030]
The invention described in claim 2 is configured such that the same number of micro switches are arranged on the left and right sides of the latch lever, so that the same force is applied to both sides of the latch lever when the latch lever rotates, and the latch lever twists and falls. It is possible to realize a combined cooking rice cooker that can avoid abnormalities such as being caught in the middle.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the configuration of a combined cooking rice cooker according to an embodiment of the present invention. FIG. 2 is a side view showing the configuration of a latch means. FIG. 3 is a circuit diagram showing electrical connection. The side view for explaining the state in which the hook is engaged with the latch means. FIG. 5 is the perspective view for explaining the structure of the latch lever with the latch claw as the center. FIG. FIG. 7 is a front view for explaining the structure of a latch lever when two micro switches are used. FIG. 8 is a perspective view for explaining a hook insertion port. Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 2a Under lid 3 Pan 4 Protective frame 5 Heating coil 6 Magnetron 7a Magnetron drive power supply 12 Hook 13 Latch lever 13a Latch lever shaft 13b Push button 14 Latch claw 15 Sensitive part 15b Vertical rib 16 Detection lever 16a Detection lever shaft 18 Spring 24 Hook insertion slot

Claims (2)

A bottomed cylindrical metal pan that is detachably stored in the main body, a lid that covers the upper surface opening of the main body so that it can be opened and closed, and a metal that forms the lower surface of the lid and covers the upper opening of the pan A protective frame made of a conductive material that supports the pan, a heating coil that induction-heats the pan provided on the protective frame, and microwaves to transmit the food in the pan A magnetron, a magnetron drive power source for driving the magnetron, a micro switch for turning on / off the power supply to the magnetron drive power source, and before turning on the micro switch after closing the lid body and opening the lid body Latch means for turning off the microswitch, the latch means comprising: a latch lever having a latch claw with which a hook integrally attached under the lid is fitted; and a hook provided on the rear side of the latch lever. The concern portion pushed by Tsu preparative constituted by a detection lever which is formed integrally with a common pivoting axis of the latch lever and the detection lever, the latch lever, a spring for urging the latch lever forward Combined cooking rice cooker with an integrated push button .   The composite heating rice cooker according to claim 1, wherein the same number of micro switches are arranged on the left and right of the latch lever.

Images