JP2001169925A - Electric cooking appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric cooking appliance which can shut off the energization to a heating means in a non-mounting state of a plate by a simple structure. SOLUTION: When a plate 6 is mounted to a main body case 1, a plug socket 11 moves to make a magnet plug 7 insertable into the plug socket 11. On the other hand, when the plate 6 is not mounted at the main body case 1, the plug socket 11 moves to a position where the magnet plug 7 cannot be inserted into the plug socket 11 and the power feeding from the magnet plug 7 to the plug socket 11 is made infeasible as well. Since the plug socket 11 itself has a mechanism to make the plug socket itself movable by accompanying the attachment and detachment of the plate 6, the energization to a sheathed heater 5 may be shut off in the non-mounting state of the plate 6 by the simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cooker using a cooking plate such as a hot plate.

[0002]

Generally, this type of electric cooking utensil has a detachable bottomed cylindrical plate on the upper side of a main body case forming an outer shell of the electric cooking utensil. Attaches this plate to the main body case and inserts a separate plug from the outside into a plug receiver provided in the main body case to energize a heater as a heating means for heating the plate and other various electric circuits. Things are disclosed.

However, in such a case, regardless of whether the plate is mounted on the main body case or not, if the magnet plug is inserted into the plug receiver, the heater is energized and the plate is removed from the main body case. When the power is supplied as it is, the temperature of the heater rises to about 800 ° C and the heat shield provided near the
It rises to about ° C. In other words, when power is supplied without mounting the plate on the main body case, there is a problem that the heater and the heat shield plate are exposed to the outside at high temperatures.

To cope with such a problem, a safety mechanism as shown in FIGS. 3 and 4 has been known as a conventional example. That is, in the figure, reference numeral 101 denotes a frame as a main body case forming an outer shell of the cooking device.
A plug receiving cover 103 having a locking piece 102 below the outer periphery of 1
Are detachably fixed to the frame 101. A plug receiver 104 is fixed to the upper surface of the plug receiving cover 103, and a magnet plug 105 is externally attached to the plug receiver 104.
Is to be inserted. On the other hand, reference numeral 106 denotes a microswitch 106 as an electrical switch, which is a movable piece which can be turned on and off to turn on and off a built-in contact (not shown).
106A and a lead wire 106B that enables electrical connection with other components.

[0005] 107 is a plate for accommodating the object to be cooked. The plate 107 is detachably provided from the upper surface side of the frame 101, and an L-shaped safety bracket 108 which is movable with the attachment and detachment of the plate 107 is mounted on the frame 101 above the microswitch 106. Supported. Also, 109 is plate 1
A heat shield plate provided below 07 is used to block heat released from a heater 111 described later to the frame 101 side. A safety bracket 10 is provided on the outer peripheral step portion 109A of the heat shield plate 109.
Hole 11 for allowing the tip of 8 to protrude above heat shield 109
0 is formed. Further, a heater 111 as a heating means is provided above the heat shield plate 109. By placing the plate 107 on the heater 111, heat from the heater 111 is reduced.
It is configured to tell 107.

In the above configuration, as shown in FIG.
In a state where the plate 107 is removed from the frame 101, there is no load applied to the safety fitting 108, so that the movable fitting 106A of the micro switch 106 pushes the safety fitting 108 upward, and the contact of the micro switch 106 is turned off. Therefore, in this case, even if the magnet plug 105 is inserted into the plug receiver 104, energization to the heater 111 and other electric circuits is electrically cut off.

On the other hand, as shown in FIG. 4, when the plate 107 is mounted on the frame 101, the tip of the safety fitting 108 abuts on the lower surface of the plate 107, so that the safety fitting 108 is provided.
As a result, the movable piece 106A of the micro switch 106 is pushed down. Therefore, in this case, when the magnet plug 105 is inserted into the plug receiver 104, the heater 111 and other electric circuits can be energized.

However, with such a configuration, when the plate 107 is mounted on the frame 101, the electric microswitch 10 that enables the heater 111 and the electric circuit to be energized is provided.
6 must be built in, and the cost increases with the increase in the number of parts. Further, when assembling, wiring of the lead wire 106B attached to the microswitch 106 and the like are required, which further increases the cost.

In order to solve such a problem, a shutter type baffle plate which moves up and down is provided between the plug receiver and the plug, and the baffle plate closes the front of the plug receiver as the plate is removed from the main body case. By moving
There is also known a device in which insertion of a plug is disabled so that power to a heater or an electric circuit cannot be supplied.

However, in such a device, a movable baffle must be provided separately, which not only inevitably raises the cost but also, once the plug is inserted into the plug receiver, the plate is thereafter moved to the main body. Even when the plug is removed from the case, the baffle hits the side surface of the plug and does not move any further, so that the heater or the electric circuit is energized without the plate.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an electric cooking appliance which can cut off the power supply to the heating means when the plate is not mounted by a simple structure.

Another object of the present invention is to provide an electric cooking appliance which can reliably shut off the power supply to the heating means when the plate is removed from the main body case with the magnet plug inserted into the plug receiver. is there.

[0013]

In the electric cooking appliance according to the first aspect of the present invention, when the plate is mounted on the main body case during cooking or the like, the plug holder moves so that the magnet plug can be inserted into the plug holder. That is, it becomes possible to heat the cooking object in the plate by energizing the heating means.
On the other hand, when the plate is not mounted on the main body case, the plug receiver moves to a position where the magnet plug cannot be inserted into the plug receiver, so that power cannot be supplied from the magnet plug to the plug receiver. As described above, since the plug receiver itself has a mechanism that can be moved in accordance with the attachment and detachment of the plate, the heating means can be provided in a non-attached state of the plate with a simple structure without adding external parts as in the related art. To the power supply.

In the electric cooking appliance according to the second aspect of the present invention, when the plate is removed from the main body case with the magnet plug inserted into the plug receiver, the magnetic force between the plug receiver and the magnet plug joined by magnetic force. Against the suction power,
The plug receiver moves to a position where the magnet plug cannot be inserted into the plug receiver, and the magnet plug naturally comes off the plug receiver. Therefore, the power supply to the heating means can be reliably shut off.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electric cooking appliance according to an embodiment of the present invention; FIG. The electric cooking utensil in the present embodiment is a hot plate.

Reference numeral 1 denotes a main body case forming an outer shell of the hot plate. The main body case 1 has a concave portion 2 which is lowered downward except for the outer peripheral portion. A heat shield plate 3 is attached and fixed above the recess 2 via a spacer (not shown). A hole 4 is formed in the heat shield plate 3 so that a tip portion of a safety fitting 15 described later protrudes and retracts above the heat shield plate 3. At the center of the upper part of the heat shield plate 3, a sheath heater 5 as a heating means is mounted and fixed via a mounting bracket (not shown). Reference numeral 6 denotes a bottomed cylindrical plate that accommodates the object to be cooked. The plate 6 is detachably provided so as to be placed on a sheath heater 5 provided in the main body case 1.
Is heated.

On one side of the main body case 1, a plug insertion port 8 for inserting a magnet plug 7 from the outside into the main body case 1 is formed. A permanent magnet 9 is provided on the front surface of the magnet plug 7 in addition to a pair of power supply terminals (not shown). When the magnet plug 7 is inserted from the plug insertion port 8, the plug provided in the main body case 1 is provided. Receiving 11
The magnet plug 7 is detachably joined to the plug receiver 11 by the magnetic attraction force between the magnet plug 7 and the permanent magnet 9. Since the permanent magnet 9 has a relatively weak magnetic force, the magnet plug 7 can be easily attached to and detached from the plug receiver 11.

As shown in FIGS. 1 and 2, the plug receiver 11 has a plug receiving holder 12 integrally mounted thereon. The base end portion of the plug receiving holder 12 is provided with a shaft portion below a stepped flange portion 13 provided on one side of the recess 2.
It is supported by 14. On the opposite side of the plug receiver 11 about the shaft part 14, an L-shaped safety bracket 15, the tip of which can abut the lower surface of the plate 6, is provided integrally with the plug receiver holder 12. As a result, the plug receiver 11, the plug holder 12, and the safety bracket 15 are all rotated about the shaft 14 in a seesaw manner as if they were one member.

Reference numeral 16 denotes a spring for urging the plug receiver 11 so as to always tilt downward inside the main body case 1. The spring 16 includes an upper surface of the plug receiver 11 and the plug receiver 11.
Are provided between the convex portions 17 and 18 formed on the upper portion of the inner surface of the outer peripheral portion of the main body case 1 located above the main body case 1. Spring 16
Of the safety bracket 15 due to the biasing force of the plate 6 due to its own weight.
And a force smaller than the magnetic attraction force between the magnet plug 7 and the plug receiver 11 is selected.
Various urging means other than the spring 16 may be used as long as this condition is satisfied.

Reference numeral 21 denotes a plug receiving cover provided so as to cover the opening 22 below the main body case 1. The plug receiving cover 21 is provided with the main body case 1 and the plug insertion port 8.
And for hiding the plug receiver 11 and the safety fitting 15 below the flange portion 13, and having a claw-shaped locking piece 23.
For example, it is detachably provided to the main body case 1. Reference numeral 24 denotes connection terminals for connecting the plate 6 and various electric components (not shown).

Next, the operation of the above configuration will be described. First, when the plate 6 is not mounted on the main body case 1, only the urging force of the spring 16 acts on the plug receiver 11 as shown in FIG. For this reason, the seesaw-type movable plug receiver 11 rotates clockwise about the shaft portion 14 as a fulcrum,
In the state of being tilted downward in the body case 1,
11 is placed so as not to face the plug insertion port 8. At the same time, the safety fitting 15 also rotates clockwise about the shaft 14, and the base end of the safety fitting 15 abuts on the lower surface of the flange 13. At this time, the tip of the safety fitting 15 projects upward by about 10 mm from the hole 4 of the heat shield plate 3. Since the plug receiver 11 is kept pressed downward by the spring 16, the magnet plug 7 cannot be connected to the plug receiver 11 even if the magnet plug 7 is inserted through the plug insertion port 8. . Therefore, it becomes impossible to energize the sheathed heater 5 and other electric circuits, and it is possible to prevent the sheathed heater 5 and the heat shield plate 3 from becoming hot when the plate 6 is not mounted.

From this state, for example, to perform cooking,
The plate 6 is mounted on the main body case 1. Then, as shown in FIG. 2, the plate 6 is placed on the upper surface of the sheath heater 5, and the force of the plate 6 due to its own weight is applied to the heat shield plate 3.
Acts on the safety fitting 15 protruding upward from the hole 4. Since the force of the plate 6 due to its own weight is larger than the urging force of the spring 16, the safety bracket 15, and thus the plug holder 11 and the plug holder 12, resist the urging of the spring 16.
However, the plug receiver 11 is rotated counterclockwise from the position shown in FIG. 1 with the shaft part 14 as a fulcrum, and the plug receiver 11 is placed in a substantially horizontal state in the main body case 1, that is, in a state where the plug receiver 11 faces the plug insertion port 8. I will Therefore, when the magnet plug 7 is inserted from the plug insertion port 8, the front surface of the magnet plug 7 reaches the plug receiver 11 as it is, and the members of the magnet plug 7 and the plug receiver 11 are connected by the magnetic attraction. Thereby, it becomes possible to energize the sheath heater 5 and other electric circuits.

On the other hand, when the plate 6 is removed from the main body case 1 in a state where the magnet plug 7 is inserted into the plug receiver 11, the force due to the weight of the plate 6 up to that point is reduced by the safety fitting 15.
And the urging force (elastic restoring force) of the spring 16 and the magnetic attraction force between the magnet plug 7 and the plug receiver 11 act on the plug receiver 11. In this case, the urging force of the spring 16 is applied to the magnet plug 7 and the plug receiving portion.
As shown in FIG. 1, the plug receiver 11 is inclined downward again, and the magnet plug 7 is automatically removed from the plug receiver 11 because the magnetic attraction force is larger than the magnetic attraction force between the plug receiver 11 and the plug receiver 11. In this case, the magnet plug 7 cannot be connected to the plug receiver 11 again, and the power supply to the sheath heater 5 and other circuits can be surely cut off.

In the above-described series of operations, the plug receiver 11 itself has a mechanism that can move within the main body case 1 as the plate 6 is attached and detached, so that a conventional external switch such as an electric switch or baffle plate is provided. There is no need to add components. Therefore, the plug receiver 11 is not fixed to another member but is configured to be movable within the main body case 1, thereby preventing the cost increase accompanying the increase in the number of parts and preventing the sheath heater 5 from being mounted without the plate 6. And other electric circuits can be cut off.
In this embodiment, a plug holder 12 integrated with the plug receiver 11 is provided.
Since the movable mechanism of the plug receiver 11 is configured only by supporting the shaft with the shaft portion 14, the structure is particularly simplified.

As described above, in the present embodiment, the sheathed heater 5 as heating means provided in the main body case 1 is provided, and the plate 6 to be heated by the sheathed heater 5 is detachably provided on the main body case 1. When the magnet plug 7 is inserted into the plug receiver 11 provided in the case 1 to energize the sheath heater 5, the magnet plug 7 is inserted into the plug receiver 11 only when the plate 6 is mounted on the main body case 1. So that it can be inserted
11 is provided movably.

In this case, when the plate 6 is mounted on the main body case 1 during cooking or the like, the plug receiver 11 moves and the magnet plug 7 can be inserted into the plug receiver 11. 6 can be heated. On the other hand, when the plate 6 is not mounted on the main body case 1, the plug receiver 11 moves to a position where the magnet plug 7 cannot be inserted into the plug receiver 11, so that power cannot be supplied from the magnet plug 7 to the plug receiver 11. . As described above, since the plug receiver 11 itself has a mechanism that can move as the plate 6 is attached and detached, the plate 6 can be mounted in a non-attached state with a simple structure without adding external parts as in the related art. The power supply to the sheath heater 5 and other electric circuits can be interrupted.

In addition, in the present embodiment, the movable force of the plug receiver 11 when the magnet plug 7 is inserted into the plug receiver 11 and the plate 6 is removed from the main body case 1 (the urging force of the spring 16). However, it is larger than the magnetic attraction force between the plug receiver 11 and the magnet plug 7.

In this case, the magnet plug 7 is
When the plate 6 is removed from the main body case 1 in a state where the plug 6 is inserted into the plug 11, the magnetic plug 7 is inserted into the plug receiver 11 against the magnetic attraction of the plug receiver 11 and the magnet plug 7 joined by magnetic force. The plug receiver 11 moves to a position where it cannot be inserted, and the magnet plug 7 naturally comes off from the plug receiver 11. Therefore, energization of the sheath heater 5 can be reliably shut off.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the heating means is a sheath heater 5
The present invention is not limited to this, and various configurations may be adopted, such as another one may be used.

[0030]

According to the electric cooking device of the first aspect of the present invention, the power supply to the heating means can be cut off with the simple structure without the plate attached.

According to the electric cooking appliance of the invention of claim 2,
When the plate is removed from the main body case with the magnet plug inserted into the plug receiver, the power supply to the heating means can be reliably shut off.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of an electric cooker according to an embodiment of the present invention with a plate removed.

FIG. 2 is a cross-sectional view showing a main part in a state where the plate is mounted.

FIG. 3 is a cross-sectional view showing a main part of a conventional electric cooker with a plate removed.

FIG. 4 is a cross-sectional view showing a main part in a state where the plate is mounted.

[Explanation of symbols]

 1 body case 5 sheathed heater (heating means) 6 plate 7 magnet plug 11 plug receiver

Claims (2)

[Claims] 1. A plate heated by a heating means provided in a main body case is detachably provided in the main body case, and a magnet plug is inserted into a plug receiver provided in the main body case to connect the plate to the heating means. In the electric cooking appliance for energizing, only when the plate is mounted on the main body case, the plug receiver is movably provided with the attachment and detachment of the plate so that the magnet plug can be inserted into the plug receiver. An electric cooker characterized by the following. 2. The movable force of the plug receiver when the plate is removed from the main body case from a state where the magnet plug is inserted into the plug receiver, a magnetic attraction force between the plug receiver and the magnet plug. The electric cooking appliance according to claim 1, wherein the electric cooking appliance is larger than the electric cooking appliance.