JPH0132966Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice cooker switch device for a rice cooker that is used for both cooking and keeping rice warm.

With this invention, with the power cord plug plugged into an outlet, you can turn the power on and off and switch to the cooking mode and keep warm mode using the same switch lever. To provide a rice cooking switch device which is convenient to use, prevents erroneous operation, and has a simple structure, which can be achieved at the same time as switching to a hot or warm state.

As exemplified in the illustrated embodiment, the rice cooking switch device of the rice cooker of the present invention includes a power switch 1 that turns on and off the power, and a rice cooking control switch 3 that switches from one of the rice cooking state and the warming state to the other state. On the other hand, when the operation section 16 is in the upward movement position, the power switch 1 is turned off, and when the operation section 16 is in the downward movement position, the power supply switch 1 is turned on and the rice cooking control switch 3 is turned on. It is characterized by having a rice cooking operation lever 50 that turns on the power switch 1 and turns on the rice cooking control switch 3 when the operation part 16 is in the intermediate position.

The present invention will be explained in detail below based on embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 5, 7 is an outer case, 8 is a bottom case, 9 is the bottom of the inner case, 10 is a heat sink in which a rice cooker heater 11 is embedded, and 12 is a rice cooker. It is. Rice cooking operation lever 50
is composed of a first lever 2 and a second lever 5.

A mounting member 13 is fixed inside the exterior case 7, and the first lever 2 is swingably supported thereon via a first pivot 14 disposed in the horizontal direction. At the base end of the first lever 2, a switch button (operating part of the rice cooking lever) 16 is attached which is exposed to the outside through a window hole 15 formed in the outer case 7. Hanging walls 17, 17 are formed at the tip of the first lever 2, and an engaging pin 18 parallel to the first pivot 14 is fixed thereto. Also, the first lever 2 has a first lever facing downward.
A push button portion 19 is formed. A power switch 1 that is turned on and off is fixed to the mounting member 13 by the first push button part 19 (see Fig. 2,
Figure 3).

As shown in FIG. 1, the first lever 2 is configured such that the switch button 16 is located on the proximal end side of the first pivot 14, and the engagement pin 18 and the first push button portion 19 are located on the distal end side. Moreover, this first lever 2
As shown by the imaginary line in the figure, when the switch button 16 is in the upward movement position and the first push button part 19 is in the downward position, the opening/closing protrusion 20 (Fig. 3) of the power switch 1 is pressed to turn off the power. On the other hand, when the switch button 16 is in the intermediate position and the first push button part 19 is in the intermediate position, as shown by the first solid line, and as shown in FIG. is in the downward movement position and the first push button part 19 is located upward, the opening/closing protrusion 20 of the power switch 1 is released and the power is turned on.
figure).

A second pivot 21 is fixed to the mounting member 13, which is located below and on the proximal end side (left side in FIG. 1) of the first pivot 14 and is arranged parallel to the first pivot 14. The second lever 5 is swingably supported by the mounting member 13 via the second pivot 21 at its base end. The lower end of an operating rod 22 for vertically operating the thermostat 4 is locked at the tip of the second lever 5, so that the operating rod 22 moves up and down as the second lever 5 slides. Second lever 5
Guide walls 23, 23 are formed to hang down at appropriate positions, and engagement holes 24, 24 are provided in the guide walls 23, 23 to loosely fit the engagement pin 18 therein. The engagement hole 24 is bent into a substantially rectangular shape, with its horizontal portion 25 being short and its diagonal portion 26 being long. As shown in FIG. 1, this oblique portion 26 is formed along an arc centered on the first pivot 14 when the second lever 5 is in the downward movement position D. A horizontally M-shaped plate spring (positioning spring) 6 is fixed to the second lever 5 at a portion adjacent to the left side of the engagement hole 24 in FIG. This leaf spring 6 has an upper side 27 fixed to the second lever 5, a lower side 28 in a free state, and a vertical portion 2 in the state shown by the solid line in FIG.
The engaging pin 18 is configured to fit into the central recess 30 of 9 in an elastic state.

the second pivot shaft 21 of the second lever 5 and the guide wall 23;
23, there is a second push button part 3 facing downward.
1 is installed protrudingly. The mounting member 13 is turned on and off by the second push button 31, and when the opening/closing protrusion 32 (FIG. 4) is pressed, it is in the heat retention state, and when the opening/closing protrusion 32 is released, it is in the cooking state. The rice cooking control switch 3 is fixed.

The thermostat 4 is a thermoferrite 3
3. Permanent magnet 3 fixed to the upper end of the operating rod 22
4 and a compression spring 35 that biases the permanent magnet 34 downward. The permanent magnet 34 is the operating rod 2
It moves up and down as the thermostat 2 moves up and down, and is configured to take either its upper limit position (adsorption position of the thermostat 4) or lower limit position (separation position of the thermostat 4).

Thus, as shown in FIG. 4, when the tip of the second lever 5 is in the upper moving position U, the rice cooking control switch 3 is placed in the rice cooking state, and the thermostat 4 is placed in the suction position. , 1st
As shown in the figure, when the tip of the rice cooker is in the downward movement position D, the rice cooking control switch 3 is placed in the heat retention state, and the thermostat 4 is placed in the open position.

Incidentally, FIG. 5 is an electric circuit showing the relationship between the power switch 1, the rice cooking control switch 3, the rice cooking heater 11, and the warming heater 36. 37 is a temperature-sensitive reed switch.

Next, the operation of the above embodiment will be explained.

The imaginary line in FIG. 1 shows the state in which the switch button 16 is pushed up and set to the upper movement position.
At this time, the second lever 5 is in the lower movement position D, and the thermostat 4 is in the release position. Further, the engagement pin 18 of the first lever 2 is connected to the engagement hole 24 of the second lever 5.
It is located at the lower end of the positioning spring (plate spring) 6, and is in contact with the lower surface of the lower side 28 of the positioning spring (plate spring) 6. The opening/closing protrusion 20 of the power switch 1 is pressed by the first push button part 19 and turned off. (The rice cooking control switch 3 is in the keep warm state.) In this way, the state shown by the imaginary line in Figure 1 is when the power is on.
Indicates the OFF state. In this state, the second lever 5 is stopped at the lower movement position D by the compression spring 35 of the thermostat 4, while the first lever 2 is swung counterclockwise in FIG. 1 by the positioning spring 6. is regulated and held in its upward movement position.

Next, in order to bring the rice cooker into the rice cooking state, the switch button 16 is pushed down all at once to the lower position, resulting in the state shown in FIG. 4. At this time, the engagement pin 18 elastically deforms the positioning spring 6 to the left in FIG. Move toward the upper right of the figure. During this movement, an upward rotational force is transmitted from the first lever 2 to the second lever 5 due to the engagement between the engagement pin 18 and the engagement hole 24, and the second lever 5 also rotates counterclockwise in FIG. Then, move the operating rod 22 upward. As a result, the permanent magnet 34 moves upward against the compression spring 35 and attracts the thermoferrite 33.

By setting the switch button 16 to the downward movement position in this manner, the second lever 5 can be set to the upward movement position U, and as a result, the power switch 1 is turned on and the rice cooking control switch is turned on. 3 is in the cooking state. Also, this kind of situation
That is, in the rice cooking state shown in FIG. 4, the adsorption action of the thermostat 4 causes the second lever 5 to
is held at the upper movement position U, and the first lever 2 is prevented from swinging by the engagement between the horizontal portion 25 of the engagement hole 24 and the engagement pin 18, and is moved to the lower movement position. Retained.

Next, at the end of rice cooking, when the bottom of the rice bowl 12 reaches a predetermined temperature and the thermoferrite 33 of the thermostat 4 loses its magnetism, the permanent magnet 34 moves downward by the action of the compression spring 35. The second lever 5 is rotated to the downward movement position D. At this time, due to the engagement between the engagement hole 24 and the engagement pin 18, the first lever 2 also rotates in the same direction, and the switch button 16 reaches the intermediate position shown by the solid line in FIG. Stand still. As a result, the rice cooking control switch 3 is pressed by the second push button 31 and enters the heat keeping state. In this case as well, the power switch 1 is in the power-on state.

In this manner, the state shown by the solid line in FIG. 1 indicates the heat retention state. In this state, the second lever 5
is held stationary at the lower movement position D by the compression spring 35. Further, the first lever 5 is held at an intermediate position by fitting the engagement pin 18 into the recess 30 of the positioning spring 6 provided on the second lever 5.

In the second embodiment of the present invention shown in FIG. 6, a first lever 2 and a second lever 5 constituting a rice cooking operation lever 50 are pivoted on a common shaft 38. This first
Similar to the first embodiment, the lever 2 turns the power switch 1 on when the switch button 16 is in the upward position.
OFF state, intermediate position and lower position (4th position)
Turn on the power switch 1 in the same position as shown in the figure).
It is configured to be in a state. On the other hand, the second
As in the first embodiment, the lever 5 is in the upper movement position U to set the rice cooking control switch 3 to the rice cooking state and the thermostat 4 to the suction position (see Fig. 4), and in the lower movement position D to turn the rice cooking control switch 3 into the rice cooking state. It is constructed so that the control switch 3 is kept warm and the thermostat 4 is set to the open position (see FIG. 1).

An upward engaging protrusion 39 is provided at a proper position on the first lever 2, and this is releasably abutted (engaged) on the lower surface of the second lever 5, so that the first lever 2 is rotated from the intermediate position to the downward position. When doing so, the second
The lever 5 is configured to rotate together from a lower moving position D to an upper moving position U.

A protrusion 40 is provided at a proper position on the first lever 2 to protrude horizontally, and a plate spring (positioning spring) 6 having a bent V-shaped locking portion 41 is fixed to the mounting member 13 at one end 42 thereof. , the V-shaped locking portion 41
The protrusion 40 is positioned either above or below the V-shaped locking portion 4 only when a rotational force of a predetermined value or more is applied to the first lever 2.
1, and its rotational position can be changed between an upward movement position and an intermediate position.

Furthermore, reference numeral 43 denotes a compression spring for preventing rattling, which biases the engaging protrusion 39 in the direction in which it comes into contact with the lower surface of the second lever 5. The spring force of this spring 43 is weak;
When in the compressed state as shown by the imaginary line in FIG. 6, the protrusion 40 is determined to such an extent that it cannot move over the V-shaped locking portion 41 due to its restoring force.

The operation of this embodiment is basically the same as that of the first embodiment, so a description thereof will be omitted.

A third embodiment of the present invention shown in FIG. 7 has substantially the same construction as the second embodiment, but is characterized in that the positioning spring 6 is constructed of a two-displacement position determining spring. One end of this positioning spring 6 is connected to the first lever 2
In addition, the other end is locked to the mounting member 13, respectively.
The operation of this embodiment is similar to that of the second embodiment.

It goes without saying that the present invention can be constructed in various ways other than those shown in the above-mentioned embodiments. For example, the positioning spring 6 of the first embodiment can be fixed to the mounting member 13.

This invention has the above configuration, and when the power cord is plugged into an outlet, the power can be turned on and off.
Since the OFF operation and the switching operation to the rice cooking state and the warming state are operated by the same rice cooking operation lever, the structure is simple and easy to operate. In particular, it is possible to turn on the power and start cooking rice along with a series of downward operations from the power OFF state to the rice cooking state, and two operations are required to start rice cooking, as in the case where the rice cooking switch and power switch are provided separately. This eliminates the inconvenience and lost sales of rice cooking, which can occur when rice cooking does not start due to a user having to use the rice cooker or forgetting one of the operations. In addition, when turning off the power from the rice cooking or keeping warm state, the rice cooking control lever must be moved to an unnatural uppermost position, so it is certain that this is done consciously, keeping in mind the purpose of the operation. It is possible to avoid the danger of the power not being turned off due to careless and half-hearted operations.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the first embodiment of the present invention, Fig. 2 is a plan view of its main parts, Fig. 3 is a rear view of its main parts, and Fig. 4 is a longitudinal sectional front view showing its operation. Fifth
The figure is an electric circuit diagram used in the first embodiment, and FIGS. 6 and 7 are longitudinal sectional front views showing the second and third embodiments of the present invention, respectively. 1...Power switch, 2...First lever, 3...
...Rice cooking control switch, 5...Second lever, 16...
...Operation unit (switch button), 50...Rice cooking operation lever, ...Upper position, ...Intermediate position, ...
...Downward position.

Claims (1)

[Scope of utility model registration request] It is equipped with a power switch that turns the power on and off, and a rice cooking control switch that switches from one of the rice cooking state and the warming state to the other, and when the operation part is in the up position, the power switch is turned OFF, When the operating section is in the downward movement position, the power switch is turned on and the rice cooking control switch is set in the rice cooking state, and when the operating section is in the intermediate position,
A rice cooking switch device for a rice cooker, characterized in that it has a rice cooking operation lever that turns on the power switch and puts the rice cooking control switch in a warm state.