JP3312085B2 - Hot plate for cooking - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home and business cooking hot plate having a detachable cooking plate.

[0002]

2. Description of the Related Art A conventional cooking hot plate includes a cooking plate and a hot plate main body having a concave portion on which the cooking plate is placed. A sheathed heater is disposed in the concave portion of the hot plate main body. A cooking plate is placed on a heater for heating, and this type is mainly used. In such a cooking hot plate, when the cooking plate is not placed on the sheathed heater, the sheathed heater remains exposed. In order to prevent this, a mechanism is provided for preventing the energization of the sheathed heater when the cooking plate is not placed. This mechanism controls the energization of the sheathed heater by detecting the presence or absence of a cooking plate.
When the cooking plate was placed on the sheathed heater, the bottom of the cooking plate pushed down the stylus protruding from the hot plate body, the detection switch was turned on and the sheathed heater was energized, and the cooking plate was removed. At this time, the stylus returns to the original position, the detection switch is turned off, and the energization of the sheathed heater is prevented.

[0003] Japanese Patent Application Laid-Open No. 3-136620 also discloses a hot plate in which a cooking plate sensing switch is provided on the hot plate main body side. When the cooking plate is placed on the heating element, the cooking plate presses and slides the contact pressing member, whereby the sensing switch is turned on and the heating element is energized.

[0004]

However, in the conventional cooking hot plate, the cooking plate is simply fixed on the hot plate body, that is, on the sheathed heater, and is not fixed. If the cooking plate is moved, the cooking plate shifts or floats from the sheath heater, and there is a problem that the user touches the high-temperature cooking plate and burns when returning the cooking plate to the original position. In addition, since the stylus and the contact pressing member protrude from the hot plate body, if the stylus or the contact pressing member is accidentally or intentionally pushed in when the cooking plate is removed, the sheath heater is energized. It was very dangerous.

Since the heating method of the cooking plate is based on heat conduction from a portion in contact with the sheathed heater and radiant heat of the sheathed heater, the heat distribution on the surface of the cooking plate is uneven and the heat efficiency is poor. .

Further, conventionally, the cooking plate can be removed from the hot plate main body and washed in a round manner. However, a sheathed heater is fixed to the hot plate main body, and an operation unit and a control circuit for energizing the heater are provided. Since the electrical component is provided integrally, the hot plate body cannot be washed in a round manner, and oil and moisture spilled from the cooking plate and scum of the cooked food are wiped off only by a cleaning method. It was not very good.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a cooking hot plate that can prevent the cooking plate from shifting or floating with a simple assembling structure and can enhance the safety during use.

[0008]

The object of the present invention is to provide, as shown in FIG. 1, a cooking plate 1 on which a food is placed and heated.
And a hot plate main body 2 to which the cooking plate 1 is detachably mounted. The hot plate main body 2 is detachably divided into a plurality of pieces, and the cooking plate 1 is fitted to the hot plate main body 2. is there. The cooking plate 1 is a planar heating element, the cooking plate 1 is provided with an electrode portion 13, and one of the plurality of hot plate main bodies 2 is provided with an electric contact 41 that contacts the electrode portion 13 and a cooking plate 1. The electrical unit 21 including the control circuit 42 for controlling the temperature is concentrated.

Further, it is sufficient that the hot plate body 2 is divided into at least a portion for supporting the cooking plate 1 and a portion in which the electrical components 21 are concentrated.

Further, as shown in FIG. 5, a detecting means for detecting whether or not the respective portions of the cooking plate 1 and the hot plate main body 2 are combined is provided. Power supply control means for controlling power supply is provided.

[0011]

In the means for solving the above problems, when the cooking plate 1 is mounted on the cooking plate supporting portion of the hot plate main body 2 and the electric component of the hot plate main body 2 is mounted thereon, the cooking plate 1 is fitted to the hot plate main body 2. Fixed. Thus, the cooking plate 1 does not rise or slip from the hot plate body 2 during use. In addition, it is necessary to electrically connect the electric part of the hot plate body 2 and the cooking plate supporting part by making the cooking plate 1 a planar heating element and concentrating the electric component 21 on one hot plate main body 2. When the hot plate body 2 is stored, the hot plate main body 2 can be divided into a plurality of parts or divided into two parts, and the cooking plate supporting portion can be washed.

When all parts of the cooking plate 1 and the hot plate body 2 are combined, the electric contacts 4
Electricity is supplied to the electrode unit 13 from 1 to heat the cooking plate 1. Therefore, in a state where the attachment is incomplete, the cooking plate 1 is not heated and is safe.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a cooking hot plate according to one embodiment of the present invention is a cooking plate 1 on which a food is placed and heated.
A hot plate body 2 to which the cooking plate 1 is detachably mounted, a lid 3 for covering the cooking plate 1, and a hot plate body 2
And a power plug cord 5 that can be attached to and detached from the connector 4. In FIG. 1, reference numeral 6 denotes an operation panel provided on the hot plate main body 2, and 7 denotes legs for supporting the hot plate main body 2.

In the cooking plate 1, a rectangular bottom portion 10 and peripheral walls 11a and 11b erected from the outer peripheral edge of the bottom portion 10 are integrally formed of a conductive material such as conductive ceramics containing silicon carbide as a main component. To form a planar heating element. On the front and rear peripheral walls 11a of the cooking plate 1, a flange 12 fitted to the hot plate main body 2 is provided so as to protrude in the left-right direction. As shown in FIG. 2, a pair of electrode portions 13 extending in the front-rear direction to the flanges 12 are formed in the vicinity of the left and right ends on the bottom rear surface side by spraying a metal such as aluminum. An insulating layer 14 coated with a non-conductive material such as non-conductive ceramics is provided on the entire surface of the cooking plate 1 except for a part of both ends of each electrode portion 13 (a portion to be contacted with an electrical contact described later). Formed electrode part 1
3 are electrically insulated. Furthermore, the surface (the food contact surface) of the bottom portion 10 and the peripheral walls 11a and 11b of the cooking plate 1
Is formed with a protective layer 15 coated with a fluorine resin or the like so as to prevent the food or the like from burning and sticking, thereby improving the releasability of the food.

As shown in FIGS. 1 and 3, the hot plate main body 2 is formed in a rectangular box shape, and has a first main body 20 for supporting the cooking plate 1 and a second main body in which an electric component 21 described later is concentrated. The first main body 20 and the second main body 22 are detachably divided into two.

The first main body 20 forms a large part of the hot plate main body 2, and has vertical walls 23a and 23b standing on three sides except the front side, and the cooking plate 1 is located in a space surrounded by the vertical walls 23a and 23b. Is attached. And on the rear vertical wall 23a,
A fitting groove 24 into which the flange 12 of the cooking plate 1 is fitted is formed in the left-right direction. Protrusions 24a and 24b are provided on the upper surface and the lower surface of the fitting groove 24, respectively. The protrusions 24a and 24b are used to prevent rattling between the flange 12 of the cooking plate 1 and oil and moisture from the cooking plate 1. One body 20
To prevent intrusion. A pair of fitting projections 25 that fit into the second main body 22 are provided on the opened front end face. The fitting projection 25 is formed in a rectangular flat plate shape, and has an engagement groove 26 formed on an upper surface thereof for engaging with a fixed body described later provided in the second main body 22.

As shown in FIG. 4, the second main body 22 has a front upper surface slightly inclined toward the front lower side, and the operation panel 6 is disposed on the inclined portion. Is arranged. On the rear end face of the second main body 22, a fitting groove 30 in which the flange 12 of the cooking plate 1 is fitted is formed in the upper part thereof in the left-right direction. This fitting groove 3
Projections 30a and 30b are provided on the upper and lower surfaces of 0 to prevent backlash with the flange 12 and intrusion of oil and moisture into the second main body 22. Further, a pair of fitting concave portions 31 for fitting the fitting convex portions 25 of the first main body 20 are formed below the fitting grooves 30, and are arranged at the same interval as the fitting convex portions 25.

As shown in FIGS. 4 and 5, the second main body 22 is provided with a pair of fixing bodies 35 for fixing the first main body 20 so as not to come off when the first main body 20 is fitted. .
The fixed body 35 is rotatably supported in the second main body 22 via a support shaft 36, and one side thereof is
The claw part 3 which engages with the engaging groove 26 of the fitting convex part 25 of the first main body 20 which can penetrate through the perforation 31a on the upper surface of the first main body 20 so as to be freely retractable.
The other side of the support shaft 36 is formed as a contact portion 39 with which a push button 38 for rotating the claw portion 37 in the direction of releasing the claw portion 37 from the engagement groove 26 (the direction of arrow X in FIG. 5) comes into contact. ing. A coil spring 40 is interposed between the contact portion 39 and the bottom in the second main body 22.
0 indicates that when the claw 37 is engaged with the engagement groove 26, the claw 37
Is urged in the direction of arrow Y in FIG. Further, the push button 38 includes a head 38 a protruding from the upper surface of the second main body 22 and a head 38 a.
and a leg 38b which is connected to a and supported movably up and down in the second main body 22. The head 38a is disposed substantially at the center of the second main body 22 so as to freely enter and exit, and the leg 38b is connected to both fixed bodies 3
5 are branched from the lower portion of the head portion 38a toward the left and right outer sides so as to contact the upper surface of the contact portion 39.

As shown in FIGS. 4 and 6, the electrical component 21 is disposed in the second main body 22 and has a pair of electrical contacts 41 that contact the electrode 13 of the cooking plate 1 and a temperature of the cooking plate 1. And a control circuit 42 for controlling. Electrical contact 41
Is attached to the hot plate body 2 via an insulator, and has a bent contact portion 43 at the tip thereof,
Spherical contact members 43a that contact the electrode portions 13 provided on the contact portions 43 slightly protrude from the fitting grooves 30 and are arranged at the same interval as the two electrode portions 13 of the cooking plate 1. The contact portion 43 is urged in a direction protruding from the fitting groove 30, and when the electrode portion 13 comes into contact with the contact portion 43, the contact portion 43 is pressed by the flange 12 and elastically deformed.

As shown in FIGS. 4 and 5, the second main body 22 is provided with detecting means for detecting whether or not the cooking plate 1 and the first main body 20 are combined. This detection means includes a cooking plate detection switch 45 such as a micro switch which is turned on / off by the presence or absence of the cooking plate 1, and a first main body detection switch 46 such as a micro switch which is turned on / off by the presence or absence of the first main body 20. Both detection switches 45, 46
Has a stylus 45a, 46a which can move in and out of contact with the flange 12 of the cooking plate 1 and the fitting projection 25 of the first main body 20, and the tip of each of the styluses 45a, 46a has a fitting groove 30 and It is arranged to slightly protrude from the fitting recess 31.

As shown in FIG. 7, the control circuit 42 includes a voltage / current detector 51 for detecting the voltage / current value of the power supply,
A switch 52 for intermittently energizing the power supply, a voltage control unit 53 for adjusting an output voltage to the electric contact 41, a voltage / current detection unit 54 for detecting a voltage / current value from the voltage control unit 53 to the electric contact 41, And a control unit 55 composed of a microcomputer for controlling each unit. Then, from the connector 4 side, the voltage / current detection unit 51, the switch 52, the voltage control unit 53, and the voltage / current detection unit 54 are connected in series to the electrical contact 41 in this order, and each is connected to the control unit 55.

The control section 55 includes detection switches 45 and 46.
And a power control function for controlling the supply of power to the electrode unit 13 by determining the presence or absence of the cooking plate 1 and the first main body 20 based on the detection result of the power supply, and voltage / current value information from the voltage / current detection units 51 and 54. A function of giving a voltage adjustment instruction to the voltage control unit 53 so that the cooking plate 1 reaches the set temperature, and an operation panel when it is determined that the cooking plate 1 and / or the first main body 20 are not present. LE located at 6
A notification function is provided to notify that the mounting of the cooking plate 1 and the first main body 20 is incomplete by D display, a buzzer, voice, or the like.

Here, the procedure for assembling the cooking hot plate will be described with reference to the flowchart of FIG. First, the cooking plate 1 is placed on the first main body 20. At this time, when the cooking plate 1 is mounted while being slid slightly from the front side to the rear side of the first main body 20, the flange 12 on one side of the cooking plate 1 is fitted into the fitting groove 24 of the first main body 20. The cooking plate 1 is mounted on the first main body 20.

Next, the fitted cooking plate 1 and the first main body 20 are mounted on the second main body 22. At this time, the second body 2
2 fitting groove 30, the other side flange 12 of the cooking plate 1, the fitting concave portion 31 of the second main body 22, and the fitting convex portion 25 of the first main body 20.
Are fitted so that the second main body 22 is pushed in from the front side of the cooking plate 1 and the first main body 20. Then, the distal end of the fitting projection 25 comes into contact with the claw 37 of the fixed body 35 in the fitting recess 31, and the fitting projection 25 moves the claw 37 against the urging force of the coil spring 40 by further movement. The fixed body 35 is rotated in the direction indicated by the arrow X in FIG.

Then, the other flange 12 and the tip of the fitting projection 25 come into contact with the wall surface of the fitting groove 30 and the wall surface of the fitting recess 31 of the second main body 22 to stop the movement. The engagement groove 26 of the portion 25 reaches the position of the claw portion 37 of the fixed body 35, and the fixed body 35 pushed up by the fitting projection 25 is rotated in the arrow Y direction of FIG. 5 by the urging force of the coil spring 40. Then, the claw portion 37 is fitted into the engagement groove 26.
Then, while the first main body 20 is fixed to the second main body 22, the cooking plate 1 is fitted to the first main body 20 and the second main body 22, the two electrode portions 13 abut on the electric contacts 41, and the flange 12 is The stylus 45a and the fitting projection 25 of the cooking plate detection switch 45 abut against the stylus 46a of the first main body detection switch 46, respectively, and the assembly of the hot plate is completed.

When the assembly of the hot plate is completed, the power plug cord 5 is connected to the connector 4 and the outlet, and the desired temperature is set by the operation panel 6 and the preheating start button is pressed, the control unit 55 sets the cooking plate Detection switch 4
5 and the output signal from the first main body detection switch 46, it is determined whether or not the cooking plate 1 and the first main body 20 are present, that is, whether or not the cooking plate 1 and the first main body 20 are mounted. At this time, if both the detection switches 45 and 46 are on, it is determined that the cooking plate 1 and the first main body 20 are completely mounted, and the switch 52 is closed by giving a closing instruction. Then, electricity is supplied from the electric contact 41 to the electrode unit 13,
The cooking plate 1 is heated and can be cooked.

On the other hand, if both the detection switches 45 and 46 are off or one of the detection switches 45 and 46 is off, it is determined that the cooking plate 1 and / or the first main body 20 are incompletely mounted. Judge, switch 52
The power supply to the electrode unit 13 is prevented by keeping the open state, and the user is notified that the mounting is incomplete by an LED display on the operation panel 6 or a buzzer. Then, the user checks the mounting state of the cooking plate 1 and the first main body 20, completely mounts the cooking plate 1 and the first main body 20, and presses the preheating start button again, and again the cooking plate 1 and the first main body 20 are pressed. The mounting state of the main body 20 is detected, and both detection switches 45,
If the switch 46 is turned on, the current supply to the electrode unit 13 is started.

When the power supply to the electrode section 13 is started, the control section 55 detects the voltage / current value of the electric current flowing from the power plug cord 5 to the electric contact 41 by the voltage / current detection sections 51 and 54. The resistance value of the cooking plate 1 is determined from the voltage / current value. Then, the temperature of the cooking plate 1 is determined from the resistance value, and a voltage adjustment instruction is given to the voltage control unit 53 so that the cooking plate 1 becomes the set temperature, and the cooking plate 1 is maintained at the set temperature.

As described above, the hot plate main body 2 is divided into the first main body 20 and the second main body 22, and the hot plate 1,
By using the first main body 20 and the second main body 22 in combination, the cooking plate 1 is surrounded by
Are fitted into the fitting grooves 24 and 30 of the hot plate body 2 and fixed, so that the cooking plate 1 does not become unstable such as rattling, moving or floating. Therefore, when using the hot plate body 2
Is moved, the heated cooking plate 1 does not come off from the hot plate body 2, so that the user can
There is no accident of touching the hot cooking plate 1 and getting burned in order to restore the original condition, and the safety during use is improved. Moreover, since the cooking plate 1 is fixed to the hot plate body 2,
The electrode portion 13 and the electric contact 41 do not arrive or separate,
Power supply is not interrupted.

Further, by using the cooking plate itself as a heating element, the electrical components 21 such as the electric contacts 41 and the control circuit 42 can be concentrated on the second main body 22, and the first main body 20 supports the cooking plate 1. It is possible to clarify the function assignment of the hot plate main body 2, and it is not necessary to dispose a heating element such as a sheathed heater in the main body as in the related art. Therefore, the first main body 20 and the second main body 22 do not need to be electrically connected, and the first main body 20 and the second main body 22 can be divided at the time of storage, so that the easily dirty first main body 20 can be washed. Therefore, a user-friendly and sanitary hot plate main body 2 can be realized. Moreover, since the cooking plate itself generates heat, the heat efficiency is improved and the temperature distribution on the surface of the cooking plate becomes uniform, so that the food can be cooked efficiently, as compared with a conventional case where a portion of the sheathed heater is heated by radiant heat. Can be cooked.

The hot plate body 2 is divided into two parts: an electrical part having a structure that requires a high level of assembling technology, and a cooking plate support part having a simple structure. By selecting a manufacturing location having technology and manufacturing at each location, handling at the time of manufacturing becomes easy, and the total production cost per unit can be reduced.

Further, detection switches 45 and 46 for detecting the presence or absence of the cooking plate 1 and the first main body 20 are provided, and the electrode section is provided when the cooking plate 1 and the first main body 20 are completely mounted on the second main body 22. 13, the power supply to the electrode unit 13 is prevented when the cooking plate 1 and / or the first main body 20 are incompletely mounted. Also, the cooking plate 1 is not heated. The detection switches 45 and 46 are connected to the second main body 2.
2 and is not exposed to the outside because it is disposed in the fitting groove 30 and the fitting recess 31 of the control unit 5.
5 does not determine that the cooking plate 1 and the first main body 20 are present, and does not energize the electrode portion 13, so that a safe cooking hot plate can be realized.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example, in the above embodiment, the hot plate body 2 is divided into two,
It may be divided into three, four, or more.

Although the cooking plate itself was used as a conductive heating element, as shown in FIG. 9, the cooking plate 1 was formed of a non-conductive material such as non-conductive ceramics, and a conductive material was applied to the back surface. Alternatively, the heat generating portion 60 may be formed, and the electrode portions 13 may be provided on both left and right ends of the heat generating portion 60 by metal spraying. Also,
As shown in FIG. 10, the cooking plate 1 is formed of a non-conductive material such as non-conductive ceramics, a concave portion 61 is provided on the back surface, and a planar heating element 62 formed of conductive ceramics or the like is fitted into the concave portion 61. It may be fixed by inserting. 9 and 1
In 0, reference numeral 63 denotes an insulating layer coated with a non-conductive material except for a part of the electrode portion 13 on the back surface, and 64 denotes a protective layer coated on the surface of the cooking plate with a fluororesin or the like.

The detection switches 45 and 46 of the cooking plate 1 and the first main body 20 are not limited to limit switches.
An optical sensor including a light receiving / emitting element or the like, or another sensor or switch may be used.

[0036]

As is apparent from the above description, according to the present invention, the hot plate body is divided into a plurality of parts, and the cooking plate is fitted to the hot plate body by using the cooking plate and the hot plate body in combination. This makes it possible to avoid the unstable state in which the cooking plate rattles, moves or floats. Therefore, even if the hot plate main body is moved during use, the heated cooking plate does not fall off the hot plate main body, so that an accident such as a burn to the user does not occur, and safety during use is enhanced.

Further, by using the cooking plate itself as a heating element, the electrical components can be concentrated on one hot plate body, and the other hot plate bodies only need to support the cooking plate. Can be clarified, and it is not necessary to arrange a heating element such as a sheathed heater in the main body as in the related art. Therefore,
There is no need to electrically connect the electrical parts and the cooking plate support, and the hot plate body can be split during storage, and the dirty cooking plate support can be washed out.
A user-friendly and sanitary hot plate body can be realized for the user. Moreover, since the cooking plate itself generates heat, the temperature distribution on the surface of the cooking plate becomes more uniform than in the conventional case where it is heated by a part of the sheathed heater and radiant heat, so that cooking can be cooked uniformly and efficiently. Can be.

The hot plate body is divided into an electrical component having a structure requiring advanced assembly technology and a cooking plate support having a simple structure. Select the manufacturing location
By manufacturing at each location, handling at the time of manufacturing becomes easy, and the total production cost per unit can be reduced.

Further, it is possible to detect whether or not the respective portions of the cooking plate and the hot plate main body are combined by the detecting means, and to conduct electricity to the electrode portion when all the portions of the cooking plate and the hot plate main body are mounted. Therefore, the cooking plate is not heated even if the power is turned on in an incompletely mounted state, and a safe cooking hot plate can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a cooking hot plate according to an embodiment of the present invention.

FIGS. 2A and 2B show a cooking plate, wherein FIG. 2A is a cross-sectional view and FIG.

FIG. 3 is a sectional view of a cooking hot plate.

4A and 4B show a second main body, wherein FIG. 4A is a plan view and FIG.

FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 4;

FIG. 6 is an enlarged sectional view taken along line BB of FIG. 4;

FIG. 7 is a control circuit diagram of a cooking hot plate.

FIG. 8 is a flowchart when a cooking hot plate is used.

FIG. 9 shows another embodiment of the cooking plate, wherein (a) is a sectional view,
(B) is a bottom view

10A and 10B show another embodiment of the cooking plate, wherein FIG. 10A is a cross-sectional view and FIG. 10B is a bottom view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooking board 2 Hot plate main body 13 Electrode part 21 Electrical part 41 Electrical contact 42 Control circuit

Claims (2)

(57) [Claims] 1. A cooking plate for mounting and heating a cooking object, and a hot plate body for detachably mounting the cooking plate, wherein the hot plate body is detachably divided into a plurality of pieces. When the plate is fitted and fixed to the hot plate main body, a detecting means is provided for detecting whether or not each part of the cooking plate and the hot plate main body are combined, and based on a detection result of the detecting means, A hot plate for cooking, wherein a power control means for controlling power supply to an electrode portion of the cooking plate is provided. 2. The hot plate body is divided into a portion for supporting the cooking plate and a portion where the electrical components are concentrated, and flanges protruding from both sides of the cooking plate are fitted to each body. cooking hot plate according to claim 1, wherein the groove is characterized by being formed respectively.