JPH0552351A - Microwave oven - Google Patents

Abstract

PURPOSE:To make it possible to display light which uses the front section of a door and moreover visually recognize the display of light irrespective of the opening and closing of the door by installing a light conducting material which has a light exit plane near the rear side of a second light display section and a light incident plane near the front of a first light display section in a door-closed state. CONSTITUTION:In a state when a door 3 is closed, the light transmitted from a first light display section 6 on the side of a range main body 1 is introducted into a second light display section 7 by way of a light conducting material 35 where the second light display section 7 of a front panel 32 of the door 3 displays the light based on the lighting or flickering of a lamp 8. On the other hand, in a state when the door is kept open, the first light display section 6 on the side of the range main body 1 is exposed where the first light display section 6 displays the light based on the lighting or flickering of the lamp 8. As a result, it is possible to display the light with more distinct and transmission properties irrespective of the opened and closed state of the door 3. Furthermore, this construction makes it possible to share the light source of the first and second light display sections 6 and 7 and hence reduce the manufacturing cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven for cooking an object to be cooked contained in a cavity of a microwave oven body by microwave.

[0002]

2. Description of the Related Art As is well known, a microwave oven is provided with a cavity for housing an object to be cooked, and microwaves output from a magnetron are applied to the object to be cooked in the cavity to cook the object. It is a device that cooks an object to be cooked by heat generated by molecular friction of the object.

Conventionally, the front plate of the range main body is provided with the opening of the cavity, and the front side of the range main body is provided with a door capable of opening and closing the opening. In addition, on the front plate of the range main body, which is not closed by the door, an operation unit for setting the operating time, set temperature, heating method, etc., and various displays including the contents set by this operation unit are displayed. Is provided.

By the way, with the miniaturization of microwave ovens,
The area for arranging the operation unit and the display unit is becoming narrower. On the other hand, the number of operation keys and the amount of display contents including cooking patterns and the like have increased with the recent sophistication of microwave ovens, making it extremely difficult to arrange operation keys and display units. Is coming. Therefore, in addition to the above display unit, there is also provided a microwave oven in which a cooking pattern or the like is displayed by a sticker or the like attached to the front panel of the door.

[0005]

However, in this microwave oven, active display such as optical display cannot be performed, and therefore, there is a problem that the visibility of the display is poor. Moreover, there is a problem that the above-mentioned seal cannot be seen when the door is opened. On the other hand, the door is provided with a choke mechanism to prevent electric wave leakage, and it is difficult to dispose a lamp or the like for optical display on the door.
Therefore, it is difficult to perform optical display using the front panel of the door.

[0006] Therefore, an object of the present invention is to solve the above-mentioned technical problems, to enable an optical display utilizing the front part of the door, and moreover, to display the display regardless of whether the door is open or closed. Is to provide.

[0007]

In order to achieve the above object, a microwave oven according to a first aspect of the present invention is provided with an opening portion of a cavity for accommodating an object to be cooked in a front surface portion of the microwave oven main body, In the microwave oven in which a door capable of opening and closing the opening is provided on the front side of the microwave oven, and the door is provided with a radio wave leakage preventing means, a light source provided behind the front side of the range body and a range body A first optical display unit provided on the front surface of the door for performing a predetermined display based on lighting or blinking of the light source; and a first optical display unit provided on the front surface of the door for performing a predetermined display based on lighting or blinking of the light source. No. 2 optical display section, a light emitting surface provided at a position avoiding the electric wave leaking means of the door, close to the rear surface of the second optical display section, and the first optical display with the door closed. The light incident surface close to the front of the It is characterized in that a light guide member that.

Further, in the microwave oven of the present invention, the light incident surface of the light guide member is formed in a concave shape, and the light emission surface is formed in a rough surface so as to diffuse and transmit light. It is characterized by that. Further, in the microwave oven according to claim 2, a plurality of pairs of the light source, the first light display portion, and the second light display portion are provided, and the light guide member is provided on the light guide member. A plurality of light guide paths for guiding light from each first optical display section to the corresponding second optical display section are defined by the slits.

[0009]

According to the microwave oven of the first aspect, since the first light display portion on the front surface of the range main body is exposed with the door opened, the first light display portion is
An optical display can be performed based on lighting or blinking of a lamp. On the other hand, when the door is closed, the light incident surface of the light guide member is brought close to the first optical display unit, thereby
The light transmitted from the optical display unit can be guided to the second optical display unit side of the front surface of the door through the light guide member.

According to another aspect of the microwave oven of the present invention, the light guide member has a concave light incident surface,
The amount of light passing through each part of the light guide member can be made uniform. Moreover, the light guide member can prevent the unevenness of the transmitted light from the light emitting surface by diffusing the light by the light emitting surface formed on the rough surface. Further, according to the microwave oven of the third aspect, since the plurality of light guide paths are formed in the single light guide member, it is not necessary to provide the plurality of light guide members.

[0011]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. 3 and 4 are perspective views showing a microwave oven as an embodiment of the present invention. With reference to these drawings, this microwave oven has a range main body 1 having a cavity 2 for accommodating an object to be cooked, and a front face portion 1a of the range main body 1.
The door 3 is provided on the side and is capable of opening and closing the opening 21 of the cavity 0. On the right side of the front surface 1a of the cooker body 1, there are provided an operation unit 4 for setting the cooking time, temperature, cooking pattern, etc., and a main display unit 5 for displaying the setting contents of the cooking time, etc. . A plurality of first light display portions 6 are arranged side by side in the upper portion of the cavity 2 of the front surface portion 1 a of the range main body 1. The first of these
The optical display unit 6 is closed by the door 3 in the closed state. The lower end of the door 3 is rotatably supported by the range main body 1. On the front surface portion 3a of the door 3, a second light display portion 7 is provided side by side at a position substantially corresponding to the first light display portion 6.

FIG. 1 is an enlarged vertical sectional view of an essential part including the first and second optical display parts. With reference to FIG. 1, the front surface portion 1 a of the range main body 1 is composed of a front surface plate 10. The first light display section 6 is formed by the opening provided in the front plate 10. The lighting state and blinking state of the lamp 8 correspond to the open state and the closed state of the door 3 or vice versa. Behind the first light display unit 6, a lamp 8 as a light source including a light emitting diode and the like, and a reflector 81 for reflecting the light of the lamp to the first light display unit 6 side are provided. .. It is lit or blinked. Further, a printing sheet 9 is attached to the front surface 1a of the range main body 1 so as to cover the front of the first optical display unit 6. This printed sheet 9
The display content corresponding to each first optical display unit 6 is printed on the screen.

The door 3 is a door cover 3 which constitutes an outer peripheral frame.
1, a front panel 32 made of a transparent glass plate which constitutes the front surface 3a of the door 3, a rear panel 33 which constitutes the rear surface 3b of the door 3, and a choke mechanism 34 as a radio wave leakage prevention means for preventing radio wave leakage. And a light guide member 35 that guides the light from the first optical display unit 6 to the second optical display unit 7 side.

The choke mechanism 34 has a radio wave resonance groove 34b defined by a pair of punching plates 34a.
And the dielectric 3 which is close to the front surface 1a of the range body 1 when the door 3 is closed and introduces a radio wave into the radio wave resonance groove 34b.
4c and. The front panel 32 has a peep portion 32a for seeing through the inside of the cavity 2 when the door 3 is closed.
Then, for example, black printing is performed except for the portion that becomes the second optical display unit 7. That is, the second optical display unit 7 is composed of print sections. The printing on the front panel 32 also includes display contents corresponding to the respective second optical display units 7. The display contents, that is, the print contents, of the first optical display unit 6 and the corresponding second optical display unit 7 may be the same or different.

The light guide member 35 constitutes a plurality of light guide paths L defined by slits 36, and in each light guide path L, a light emitting surface close to the rear surface of the second light display unit 7. 35b and a light incident surface 35a that is close to the front surface of the first light display unit 7 with the door 3 closed. The light guide member 35 is made of a light transmissive resin. The width and the length of the slit 36 are set so that the light passing through each light guide L can be prevented from leaking to the other light guide L. The light guide member 35 is provided at a position avoiding the choke mechanism 34.

According to this embodiment, when the door 3 is closed, the light transmitted from the first light display section 6 on the range main body 1 side passes through the light guide member 35 and the second light display section. 7
The second optical display unit 7 of the front panel 32 of the door 3 guided to the side can perform optical display based on lighting or blinking of the lamp 8. On the other hand, when the door 3 is opened, the first optical display unit 6 on the range main body 1 side is exposed, and the first optical display unit 6 performs optical display based on lighting or blinking of the lamp 8. be able to. in this way,
A display with good visibility can be displayed regardless of whether the door 3 is opened or closed. Moreover, since the light source of the first optical display unit 6 and the second optical display unit 7 can be shared, the manufacturing cost can be reduced.

Further, since the plurality of light guide paths L are formed by partitioning the light guide member 35 with the slits 37, it is not necessary to provide a plurality of light guide members, and the manufacturing cost of the light guide member 35 can be reduced. can do. FIG. 5 shows another embodiment of the microwave oven of the present invention. This embodiment differs from the embodiment of FIG. 1 in that the light incident surface 35a of the light guide member 35 is formed in a spherical shape centered on the lamp, and the light emitting surface 35b is configured to diffuse and transmit light. That is, it is formed on a rough surface (so-called frosted glass).

According to this embodiment, in addition to the same effects as the embodiment of FIG. 1, the light incident surface 35a formed in a spherical shape makes the light quantity passing through the light guide path L uniform. Moreover, the light emitting surface 35b formed on the rough surface can diffuse the light and prevent unevenness of the transmitted light. That is, the second display window 7 does not become partially dark, and the entire second optical display unit 7 can have uniform brightness.

The present invention is not limited to the above embodiments, and for example, the light guide member 35 may be made of other light transmissive material such as glass. Also,
A plurality of light guide members 35 can be arranged corresponding to each light guide path L. Further, the light incident surface 35a is not limited to the spherical surface, and may be a concave surface.

In addition, various modifications can be made without departing from the spirit of the present invention.

[0021]

As described above, according to the microwave oven of the first aspect, when the door is closed, the second optical display section on the front surface of the door can perform optical display based on lighting of a lamp or the like. In addition, when the door is open, the first light display unit on the front surface of the range main body can perform light display based on lighting of a lamp, etc., whereby the display is visually recognized regardless of whether the door is open or closed. be able to. Further, since the light source for each light display section is shared, the manufacturing cost can be reduced.

According to another aspect of the microwave oven of the present invention, the light guide member includes a light incident surface formed in a concave shape.
The amount of light passing through each part of the light guide member can be made uniform, and the light emitting surface formed on the rough surface can diffuse the light and prevent unevenness of transmitted light from the light emitting surface. it can. As a result, the entire second light display section can have uniform brightness.

Further, according to the microwave oven of the third aspect, it is possible to secure a plurality of light guide paths with a single light guide member without providing a plurality of light guide members, and the manufacturing cost is reduced. can do.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a main part of a microwave oven as an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a microwave oven.

FIG. 3 is a perspective view showing a state in which a door of the microwave oven is closed.

FIG. 4 is a perspective view showing a state in which a door of the microwave oven is opened.

FIG. 5 is an enlarged transverse cross-sectional view of a main part of a microwave oven according to another embodiment of the present invention.

[Explanation of symbols]

 1 Range Main Body 1a Front Part 2 Cavity 3 Door 3a Front Part 6 First Light Display Part 7 Second Light Display Part 8 Lamp (Light Source) 34 Choke Mechanism (Radio Wave Leakage Means) 35 Light Guide Member 35a Light Incident Surface 35b Light Exit surface

Claims (3)

[Claims] 1. An opening of a cavity for accommodating food to be cooked is provided on the front surface of the range main body, and a door capable of opening and closing the opening is provided on the front side of the range main body. In a microwave oven provided with a radio wave leakage prevention means, a light source provided behind the front surface of the range main body and a front surface of the range main body for performing a predetermined display based on lighting or blinking of the light source. 1 optical display section, a second optical display section provided on the front surface of the door for performing a predetermined display based on lighting or blinking of a light source, and a position avoiding the radio wave leaking means of the door, And a light guide member having a light exit surface located near the rear surface of the second light display section and a light entrance surface located near the front surface of the first light display section with the door closed. Characteristic microwave oven. 2. The light incident surface of the light guide member is formed in a concave shape, and the light emission surface is formed in a rough surface so as to diffuse and transmit light. 1
Microwave oven as described. 3. A plurality of pairs of the light source, the first light display portion, and the second light display portion are provided, and the light guide member is provided with a slit provided in the light guide member. 2. The microwave oven according to claim 1, wherein a plurality of light guide paths for guiding light from the optical display section to the corresponding second optical display section are defined.