JPH06209849A - Cooker - Google Patents

Abstract

PURPOSE:To simplify the constitution, to improve the durability and the assembleability, and to satisfy the performance of a high quality at a low cost, in a switch operating device used for various cookers. CONSTITUTION:To an operating panel installing part 6 provided in an outer shell 1, an operating panel 5 in which a waterproof film 9 is formed integrally on the surface in advance is stuck, and a switch 2 on a control circuit board 4 of the inside is operated from an operating button part 10 through a switch operating button 14, by which a switch operating device of the cooker, which consists of a simple constitution, is excellent in durability, can be assembled easily, and also, is inexpensive can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch operating device for a cooking device.

[0002]

2. Description of the Related Art In recent years, many devices equipped with a microcomputer for cooking under program control have become popular. An example of this is found in rice cookers, in which the control circuit part consisting of a microcomputer, other electronic components, operation switches, and pilot lamps is built in the outer shell, and the operation panel is placed on the surface of the outer shell to operate the operation switches from above. It is equipped with a switch operating device that allows you to check the operation status from above with a pilot lamp.

Conventionally, the switch operating device of this type of cooking device has a structure as shown in FIG. The configuration will be described below with reference to FIG.

As shown in the figure, the outer shell 101 of the cooker main body
A push switch 102 (hereinafter, referred to as a switch), a pilot lamp 103, and a control circuit board 104 on which a control circuit unit such as a microcomputer (not shown) is mounted are installed inside. The switch 102 on the control circuit board 104,
The pilot lamp 103 is mounted toward the outer shell 101.

An operation panel 105 is provided on the surface of the outer shell 101.
The operation panel mounting portion 106 on which the is mounted is recessed. The operation panel mounting portion 106 has a switch 102
Switch operation hole 107 facing the actuator 102a
And a pilot lamp hole 108 through which the pilot lamp 103 for displaying corresponding to the switch operation penetrates is provided.

The switch operation hole 107 has a waterproof sheet 109.
Is watertightly adhered to the operation panel 105 side to ensure waterproofness.

Since the operation panel 105 is formed by molding, its surface is smooth and the switch operation button 1 is located at a position corresponding to the switch operation hole 107 of the outer shell 101.
A switch operation button hole 111 corresponding to the diameter of 10 is provided, and a display window 112 is provided at a position corresponding to the pilot lamp hole 108 so that the pilot lamp 103 can be visually recognized from the outside.

The operation panel 105 is watertightly adhered to the outer shell 101 by an adhesive portion 113, and the switch operation button 110
Is loosely fitted to the outer shell 101 side of the operation panel 105.

In the switch operating device of the cooker thus assembled, when the switch operating button 110 is pressed against the repulsive force of the actuator 102a of the switch 102 and the waterproof sheet 109, the actuator 102a of the switch 102 is pressed, The contact is closed, a signal is output to the control circuit unit, the pilot lamp 103 is turned on, and operation is performed.

[0010]

In such a conventional switch operating device for a cooker, the switch operating button 110 is used.
Since the control panel 105 is loosely fitted to the operation panel 105, the waterproof sheet 109 is used to protect the outer shell 101 against water entering through the gap.
The control circuit section is protected in a watertight manner by covering the switch operation hole 107 of the above in a watertight manner. However, in this configuration, since the switch operation button 110 is loosely fitted to the operation panel 105, the assembling property when laterally assembling the outer shell 101 is poor, and the switch operation button 110 is
Due to backlash, variations in durability and switch operating force,
There was a problem with reliability. Further, since the waterproof sheet 109 is required, the number of assembling steps is required to bond it, which is a factor of increasing the cost.

The present invention solves the above-mentioned problems, and the structure is simplified, the durability is improved and the switch operation force is stabilized, and the assembling property is improved while maintaining the smooth texture of the operation panel surface. The number and dose of
It is an object of the present invention to provide a switch operating device for a cooker which is inexpensive and can keep a control circuit watertight.

[0012]

The first aspect of the present invention to achieve the above object is to provide an outer shell of a cooking device, a control circuit board installed in the outer shell, and the control circuit. A push switch mounted on the substrate toward the surface of the outer shell, and an operation panel mounting portion recessed on the surface of the outer shell,
It is composed of an operation panel in which a waterproof film is integrally formed and an operation button part is only a waterproof film, and a switch operation button which operates by pushing the push switch. The operation panel is watertightly adhered to the operation panel mounting part. The push switch can be operated via the switch operation button by pressing the operation button portion on the prevention film of the operation panel.

The second means is that a key top is provided between the switch operation button and the operation panel, and the operation panel and the display section seal can be shared by the presence or absence of the key top.

The third means is that the shape of the key top on the side of the switch operation button is concave and the inner diameter thereof is larger than the outer diameter of the top of the key top side of the switch operation button, and they are loosely engaged with each other.

The fourth means is to make the outer shape of the waterproof film smaller than the outer shape of the operation panel.

[0016]

According to the first means, since the push switch is pressed from above the waterproof film on the surface of the operation panel via the switch operation button, the structure is simple and there is no rattling unlike the conventional example. The key operation force is also stable. In addition, the waterproof film is integrally molded in advance, and the operation panel with only the operation button part is watertightly adhered to the outer shell, so the operation panel and switch operation can be performed while ensuring the smooth texture of the operation panel surface. It is possible to prevent both water from entering through the gap between the button and water and through the gap between the outer lid and the operation panel. Also,
The waterproof sheet required in the conventional example is no longer required, and the material of the parts and the number of steps required for assembly can be reduced.

According to the second means, when the key top is used, the operating portion is used, and when the key top is not used, the display portion seal generally used conventionally is used. In the case, two types of configurations of the operation unit are possible with the same outer shell.

Further, according to the third means, the shape of the key top on the side of the switch operation button is concave, the inner diameter thereof is larger than the outer diameter of the top of the key top side of the switch operation button, and the key tops are loosely engaged with each other. Therefore, the key top and the switch operation button are prevented from coming off, which enables more reliable key operation.

Further, according to the fourth means, since the outer shape of the waterproof film is made smaller than the outer shape of the operation panel, it is possible to avoid the corner R portion at the end portion in the operation panel cross section, so that the heat applied during cooking can be avoided. Due to the stress, the stress acting between the operation panel having a different coefficient of linear expansion and the waterproof film can be minimized, peeling of the waterproof film from the end surface of the operation panel can be prevented, and the texture of the operation panel can be secured.

[0020]

Embodiments of the present invention will be described below with reference to FIGS.

First, the first embodiment will be described with reference to FIG. As shown in FIG. 1, an outer shell 1 of the cooker body is internally provided with a push switch 2 (hereinafter referred to as a switch), a pilot lamp 3, and a control circuit board 4 on which a control circuit unit such as a microcomputer (not shown) is mounted. There is.
The switch 2 and the pilot lamp 3 on the control circuit board 4 are mounted toward the outer shell 1.

On the surface of the outer shell 1, an operation panel mounting portion 6 for mounting the operation panel 5 is recessed. The operation panel mounting portion 6 is provided with a switch operation hole 7 exposed by the actuator 2a of the switch 2 and a pilot lamp hole 8 through which the pilot lamp 3 for displaying corresponding to the switch operation penetrates.

Since the operation panel 5 is previously integrally formed with the waterproof film 9 using, for example, a thermosetting adhesive, for example, acrylic resin, watertightness from the surface of the operation panel 5 to the inner surface can be ensured and the surface is smooth. It has a unique texture and can withstand the heat of cooking. The waterproof film 9 may be provided on the back surface of the operation panel.

At the position of the operation button portion 10 corresponding to the switch operation hole 7 of the outer shell 1, there is no resin of the operation panel 5, but only the waterproof film 9 on the surface. This waterproof film 9 is an electrically insulating material having elasticity. , For example, since the polyethylene terephthalate resin film is formed with flexibility, the center part is always elastic, and when pressed, it flips downward, and when released, it flips and returns to its original snap function. Is equipped with.

A display window 11 is provided at a position corresponding to the pilot lamp hole 8 so that the pilot lamp 3 can be visually recognized from the outside, and the operation panel 5 is watertightly adhered to the outer shell 1 by an adhesive portion 12. .

The material of the operation panel 5 is not limited to acrylic resin, but may be other resin. Further, the material of the waterproof film 9 is not limited to polyethylene terephthalate, and other resin may be used.

Between the operation button section 10 of the operation panel 5 and the switch 2 on the control circuit board 4, a key top 13 and
A switch operation button 14 is provided, and the shape of the key top 13 on the side of the switch operation button 14 is concave, and the inner diameter thereof is larger than the outer diameter of the top of the key top 13 side of the switch operation button 14, so that they are loosely engaged with each other. ing.

In the switch operating device of the cooker thus configured, the operation button section 10 of the operation panel 5 is
Actuator 2a of switch 2 and waterproof film 9
When it is pressed against the repulsive force of the switch 2, the actuator 2a of the switch 2 is pressed through the key top 13 and the switch operation button 14, the contacts are closed and a signal is output to the control circuit unit, and the pilot lamp 3 is turned on to operate. I do.

According to the switch operating device of the cooker having the above structure, the switch 2 is pressed from above the waterproof film 9 on the surface of the operation panel 5 via the switch operating button 14,
The configuration is simple, there is no play like the conventional example,
The key operation force is also stable.

In addition, since the waterproof film 9 is integrally formed in advance and the operation button portion 10 has the operation panel 5 with only the waterproof film 9 adhered to the outer shell 1 in a watertight manner, a smooth texture of the surface of the operation panel 5 is secured. While operating panel 5
Of water from the gap between the switch operation button 14 and
Both water can be prevented from entering through the gap between the outer shell 1 and the operation panel 5, and the waterproof sheet required in the conventional example becomes unnecessary.

Further, since the key tops 13 are used, there are two types of operation parts, that is, when the operation panel 5 is used as an operation part and when a membrane generally used conventionally is used without using the key tops 13. Can be configured with the same outer shell 1, and for example, when manufacturing two or more types of cookers with different prices such as high-class type and popular type, the mold of the outer shell 1 can be shared, This has the effect of reducing mold costs.

Since the shape of the key top 13 on the switch operation button 14 side is concave and the inner diameter thereof is larger than the outer diameter of the top of the key top 13 side of the switch operation button 14, they are loosely engaged with each other. There is an effect that the top 13 and the switch operation button 14 are prevented from coming off, and more reliable key operation is possible.

Although the key top 13 is used in this embodiment, the key top 13 need not be used as shown in FIG. 1 unless it is necessary to share the operation part with the display part seal. Needless to say.

Next, a second embodiment will be described with reference to FIGS. 3 and 4. The description of the same parts and configurations as those in the first embodiment will be omitted.

As shown in FIG. 4, a waterproof film 9 having an outer shape smaller than the outer shape of the operation panel 5 is integrally formed on the surface of the operation panel 5 having the operation button portion 10 and the display window 11. Therefore, the acrylic resin of the operation panel 5 can be seen with the width of the margin 15 over the entire circumference.

As shown in FIG. 4, a corner R portion 16 is provided at the end of the cross section of the operation panel 5 so as to be smooth. The waterproof film 9 is formed to be smaller inward than the outer circumference of the operation panel 5 by the margin 15.

According to the switch operating device of the cooker using the operation panel 5 having the above-mentioned structure, the adhesive portion between the operation panel 5 and the waterproof film 9 avoids the corner R 16 at the end of the operation panel cross section. The stress generated due to the difference in linear expansion coefficient due to the difference in material between the operation panel 5 and the waterproof film 9 due to the thermal stress applied during cooking is dispersed and relaxed on a flat surface. Therefore, the waterproof film 9 can be prevented from peeling off from the end portion of the operation panel 5, and the texture of the operation panel 5 can be ensured.

[0038]

As is clear from the above description of the embodiments, the present invention has the following effects. (1) The structure is simple, there is no rattling, the durability is excellent, and the key operation force is stable. (2) Since the waterproof sheet is not necessary, the number of steps required for assembling the parts and assembling can be reduced. (3) By using the key top, the same shell can be used for two or more models of cookers. (4) Since the key top and the switch operation button are loosely engaged with each other, more reliable key operation can be performed. (5) Since the waterproof film is prevented from peeling off from the end surface of the operation panel, the texture of the operation panel can be secured and the quality can be improved. The effect is that the cooking is simple, the quality is excellent, the number of members and the man-hours required to assemble them are reduced, the cost is low, and the control circuit can be kept watertight. A switch operating device for a container can be provided.

[Brief description of drawings]

FIG. 1 is a side sectional view of a switch operating device of a cooker according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of a switch operating device of a cooking device when a key top is not used.

FIG. 3 is a front view of the components of the operation panel of the switch operating device of the cooking device according to the second embodiment of the present invention.

FIG. 4 is a sectional side view of components of an operation panel of a switch operating device of a cooking device according to a second embodiment of the present invention.

FIG. 5 is a side sectional view of a switch operating device of a cooking device in a conventional example.

[Explanation of symbols]

 1 Outer shell 2 Push switch 5 Operation panel 6 Operation panel mounting part 7 Switch operation hole 9 Waterproof film 10 Operation button part 14 Switch operation button 15 Reservation allowance 16 Corner R part

Claims (4)

[Claims] 1. An outer shell of a cooker, a control circuit board installed in the outer shell, a push switch mounted on the control circuit board toward the surface of the outer shell, and a surface of the outer shell. The operation panel mounting section is provided with a recess, a waterproof film is integrally molded, and an operation panel having only a waterproof film as an operation button section, and a switch operation button for pressing the push switch to operate the operation panel. Is watertightly adhered to the operation panel mounting portion, and the push switch can be operated via the switch operation button by pressing an operation button portion on the prevention film of the operation panel. 2. The cooker according to claim 1, wherein a key top is provided between the switch operation button and the operation panel, and the display panel seal can be shared with the operation panel depending on the presence or absence of the key top. 3. The key top has a concave shape on the switch operation button side, the inner diameter of which is larger than the outer diameter of the top of the key top side of the switch operation button, and the key tops are loosely engaged with each other. Cooker described. 4. The cooker according to claim 1, wherein the outer shape of the waterproof film is smaller than the outer shape of the operation panel.