JPH0833214B2 - Heating device display - Google Patents

Description

TECHNICAL FIELD The present invention relates to a display on an operation panel in a heating device.

2. Description of the Related Art In a microwave oven, an electric oven, an oven toaster, or the like, a plurality of switching operation buttons are provided on an operation panel provided on the front surface of the device to switch the intensity of heating output or the upper and lower heater energization modes. .

These operation buttons function as the contents of the button itself when the corresponding button is pressed, or the characters or symbols (hereinafter referred to as characters) displayed near the button itself.

The display contents and display method of such operation buttons are
In order to get the user to operate correctly, it is necessary to display intelligibly so that there is no misunderstanding.

As a first example of the display of the button, for example, in the operation panel 1 of the microwave oven as shown in FIG.
The push buttons 2 and 3 are provided, and the display is "strong" or "weak".
In some cases, when the button 2 displayed as "strong" is pressed, a strong output is output, and when the button 3 displayed as "weak" is pressed, a weak output is output.

At this time, when the "strong" (or "weak") button 2 is pressed, the button 2 is maintained in the pressed state.

On the other hand, the pair of "weak" (or "strong") buttons 3
Is sticking out against this.

That is, the pressed button is maintained in a relatively retracted state so that the button is operated and cooking is performed in the mode indicated by the button (in this case, strong output). It is shown that.

The “strong” and “weak” buttons 2 and 3 are mechanically linked to each other, and when one of the buttons is retracted, the button on the opposite side always pops out.

In this state where only the pressed button is retracted and the others are protruding, the number of buttons is three, four, etc., and even if the mechanism is slightly different, it is generally almost It is configured to show a similar state.

On the other hand, as a second example, in the case where a display device such as a fluorescent tube, an LED, and a liquid crystal is provided on the operation panel, even if such a difference in the comings and goings of the buttons (difference in height) is not provided,
Since the contents of the operated button can be displayed on the display device,
As the button, a flat one such as a membrane switch can be used.

The third case is an intermediate display method between the first and second cases, where a small light source such as an LED lamp or a miniature ball is attached to each button beside the operation button or in the center of the button itself. There is also a configuration in which one lamp is provided and the lamp is turned on when the button is pressed.

Problems to be Solved by the Invention In the first case described above, it is necessary to determine which button has been operated based on the difference in the pressing amount (protruding height) of the button.

If you accidentally operate it, for example, if you press the "strong" button for the purpose of thawing raw food with weak output, if you notice it in the middle, you can press the button again, but if you do not notice it, It causes a problem that the food is boiled.

At this time, the protruding amount of the button is for the front surface of the operation panel, and since it is viewed from the same direction, that is, from the front surface, it is a structure that is not noticeable.

In the second case, there is a drawback that the driving and rotating structure of the display tube and the like is expensive and expensive, and if the user makes a mistake, the display content on the display tube will be different from the intended purpose, which is immediately noticeable. However, the operation for correction requires that you press the "Cancel" button or key to make the display blank, cancel the contents of the internal storage device such as the microcomputer, and then perform the operation again. There is.

In the third case, the LED drive circuit has a lower voltage and a direct current than a household AC power supply, and thus requires a circuit and dedicated parts for it, which is simpler than the second case, but the first case It is relatively expensive compared to the case.

Means for Solving the Problems The present invention solves the above-mentioned conventional problems, and a lamp that illuminates the inside of a heating chamber by arranging a plurality of switching operation buttons on an operation panel that controls heating time, heating means, and the like. A part of the light is directly applied to the switching operation button itself or the rear surface in the vicinity of the switching operation button so that the characters displayed on the switching button can be visually recognized from the front surface of the operation panel.
A light-shielding plate that moves in association with the pressing operation of the plurality of switching buttons is provided on the back surface of the switching button, and the display portion of the button that is not operated shields the irradiation light by the light-shielding plate,
Only the operated button has its display portion irradiated with irradiation light through a passage hole provided in the light shielding plate.

Action According to the above configuration, the light shielding plate is moved by the mechanical operation of the push button, and the pressed button portion or the vicinity thereof is passed through the transmission hole provided in the light shielding plate, and by the lamp for internal lighting. Will be illuminated.

Therefore, the characters and the like displayed on the operation panel for displaying the contents of the buttons are extremely easy to see.

Moreover, since the brightness comparison between the illuminated portion and the non-illuminated portion is extremely clear, it is possible to easily determine which button is pressed even from a position slightly away from the heating device.

This is convenient when the heating device is installed in a dark place and can be operated and used extremely correctly without misidentification.

In addition, it also has a lamp that illuminates the inside of the heating chamber as a light source for these illuminations, and only needs to place a light-shielding plate linked to the operation of pushing the operation button. The cost is cheap.

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

In FIG. 1, FIG. 2, and FIG. 3, two push buttons 6 and 7 that can be operated on the operation panel 5 are connected to a support pin 8 provided on the back of the panel, and a connecting member 9 is rotatably held. Are held by pins 10 and 11 respectively at both ends of.

The support pin 8 is located approximately in the middle of the two buttons 6 and 7.

The connecting member 9 is provided with a protrusion 12 in the depth direction of the support pin 8.

On the other hand, a triangular convex portion 13a is provided at the center of the elastic plate 13 whose both ends are fixed to the back side of the panel.

The projection 12 of the connecting member 9 is in a position opposed to this, and when the push button 6 or 7 is pushed and this projection 12 gets over this projection 13a, it produces a click feeling of switching the button and switches it at the same time. It also has a role of holding it from the position so that it does not move freely due to vibration or shock.

The connecting member 9 has an arm 14 on the side opposite to the protrusion 12.
The tip drives the shading plate 15 up and down.

The light-shielding plate 15 has a hole 16 in a part thereof. The hole 16 has characters or the like indicating the function of the push button printed on the operation panel 5, and is sufficient to cover the size of the character or the like. It has a size.

The hole 16 of the light shield plate faces the display portion 17 of the upper push button when the upper push button 6 is pressed.

When the lower push button 7 is pressed, the connecting member 9 is inverted with respect to the support pin 8 as a fulcrum with respect to FIG.
The position of is opposed to the display portion 18 of the lower push button 7.

On the other hand, a lamp 19 for illuminating the heating chamber is located behind these related components, and the light of the lamp 19 is guided into the heating chamber through a large number of small holes provided on the side surface of the heating chamber.

In the case of microwave ovens, etc., where high frequency waves should not leak out of the heating chamber, the diameter should be 2-3 m as described above.
It is often the case that holes with a size of m are closely arranged and many lamps are installed outside the holes.

In the figure, the arrangement of the lamp 19 shows an example in the case of a microwave oven, and the lamp 19 is arranged in the air guide 20 for guiding the cooling air of the magnetron for high frequency generation into the heating chamber, and therefore the lamp on the side surface of the heating chamber. The large number of small holes has a function of allowing the air after cooling the magnetron to enter the heating chamber and also allowing the illumination light to enter.

In the case of an electric oven or the like, the lamp may be arranged in a place where it is not contaminated by smoke, oil splashes, etc. generated from various cooked foods inside the heating chamber.

In the case of an oven toaster, generally, a lamp is rarely installed for internal lighting, but if installation is necessary, the same idea as in the case of the electric oven may be used.

When the lamp 19 is arranged as in the above microwave oven, an appropriate hole 20a can be formed in the air guide 20 to guide the light of the lamp to the rear surface of the operation panel 5.

The light of the lamp 19 is emitted to all the operation buttons, but the light of the button that is not pressed is blocked by the light shielding plate 15 and cannot be seen from the operation panel 5.

The operation panel 5 is made of a transparent resin material such as acrylic, polycarbonate, AS, etc., leaving characters or the like indicating its display contents, and painting or solid-printing other parts in black or the like so as to be opaque. The light from the back surface is applied to the translucent portion so that characters and the like are raised and shown.

Alternatively, there is also a method in which an opening is provided on the operation panel 5 for a character or the like, a character is printed on a polyester film or the like, and the entire periphery including the character or the like of the film is illuminated.

When characters or the like are printed on the push button itself, the shading plate 15 is on the back side of the button, and the hole 16 formed in the shading plate 15 is approximately the size of the button.

At this time, the button has a space for displaying characters etc. on the front surface, and other than the characters etc. of this part is coated with non-translucency, or like the above description, a printed film is put on the surface of the button Illuminate parts such as letters by means such as pasting.

4 and 5 show the case where there are three or more push buttons.

At the rear ends of the push buttons 21 to 23, slidable bodies 24 to 26 (which may be metal plates or resin plates) having an inclination are aligned in a vertical or horizontal line, and when any of the push buttons is pressed, , Only one sliding body 26 pops out rearward.

Also, the slanted portions 24a, 25a, 26 of the respective sliding bodies 24-26 are
Rotation fulcrums 27 to 29
Light shields 30-32 with are arranged, these light shields
30 to 32 A plurality of openings 33 (windows) communicating with the operation panel 5a are covered.

When one of the push buttons (for example, 23) is pushed, the sliding body 26 that pops out by that pushes the light shield plate facing it.
31 is rotated, the window 33 is opened, and the illumination light reaches the display plate 34 on the rear surface of the operation panel 5a from the window 33.

The light-shielding plates 30 to 32 are designed to constantly cover the opening 33 with a spring or the like, and when the other push button is operated, the protruding sliding body 26 is retracted, and the opening 33 opened thereby is opened. The light blocking plate 31 closes it again, and then the other light blocking plates open the openings instead.

Effects of the Invention According to the above configuration, the following effects are obtained.

(1) Of the plurality of switching operation buttons on the operation panel, only the operated button and the characters indicating the contents thereof are illuminated from the back side, so it is extremely easy, reliable, and dark to see from the front side of the operation panel. Even when installed in a room or in a shadowed place, or from a slightly distant position, the occurrence of misunderstanding is small, and even if an erroneous operation is performed, it becomes quicker to notice.

(2) The lamp for lighting the heating room can be used as a light source to illuminate the characters displayed on the push button on the operation panel, and a separate light source is not required for the display illumination, which simplifies the structure and reduces costs. Can be cheaper.

(3) Illumination is performed only by the movement of the light shielding plate which moves at a right angle to the operation direction of the push button on the back surface of the panel in conjunction with the movement of the push button operated vertically with respect to the front surface of the operation panel. It is possible to distinguish between a part and a part that does not exist, the number of movable parts is small, the operation is reliable, and the failure is small.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA ′ of FIG. 1, FIG. 3 is a sectional view taken along the line BB ′ of FIG. 1, and FIG. An example partial cross-sectional view, FIG. 5 is C- of FIG.
FIG. 6 is a front view of the conventional example, which is a C'cross-sectional view. 5 ... Operation panel, 6, 7 ... Switching button, 9 ... Connecting member, 12 ... Projection, 13 ... Elastic body, 15 ... Shading plate, 19 ...
… Lamp, 20 …… Air guide, 24,25,26 …… Sliding body,
30, 31, 32 …… Shading plate, 33 …… Opening (window).

Claims (1)

[Claims] 1. A plurality of switching buttons are arranged on an operation panel which is provided on the front surface of the heating and cooking apparatus and controls the heating time, heating means, etc., and a part of the light of a lamp for illuminating the inside of the heating chamber is described above. A light-shielding plate that is applied directly to the switching button or the rear surface in the vicinity thereof and that moves in conjunction with the pressing operation of the switching button is provided. A display device of a heating device configured such that irradiation light is applied to the display part through a light transmission hole provided in the light shielding plate, and a display character of a portion operated by the switching button can be visually recognized from the front surface of the heating device.