JP2016169919A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of improving visibility and operability of a movable part for operation.SOLUTION: A switch 18 is arranged so as to close a contact point by pressing a movable part 15. An LED 19 is attached to a circuit board at one place and at a substantial center of a surface on which the movable part 15 is projected in a housing 17 direction. When the LED 19 emits light, light from the LED 19 spreads while repeatedly reflected between the back face of the movable part 15 and the light diffusion surface of the housing 17, penetrates a light-emitting part 16, and is radiated to the front face of the movable part 15. Consequently, visibility and operability of the movable part 15 can be improved.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an operation device for a cooking device having a high-frequency heating function and a radiant heating function, for example.

  The conventional cooking device is provided with a heating chamber for accommodating an object to be heated inside a box-shaped cooking device. The heating chamber is provided with a front opening for taking in and out the object to be heated on the front. In the front opening, a door is pivotally supported at the lower part and is attached to be openable and closable in the vertical direction.

  An operation unit is provided next to the front opening of the cooking device. The operation unit is provided with a plurality of operation keys such as a start key and a display unit such as a liquid crystal display and an LED (light emitting diode). Conditions and instructions related to heating control are set using the operation keys. And information such as cooking progress are displayed on the display unit (for example, see Patent Document 1).

Japanese Patent No. 4309903

  However, in the conventional configuration, a plurality of light emitting diodes as light sources are dispersed and corresponded to each light emitting portion (light emission required region) provided adjacent to the operation key on the circuit board of the operation portion. Is provided. If the light emitting diodes are concentrated on the light emitting portion that emits light, a point light source (point light source) is obtained. In the state of the point light source, the light emitted from the light emitting diode is difficult to disperse widely, so that the light emitting part emits light strongly around the light source and weakens at a position away from the light source. Therefore, since the light emission range is limited to a wide light emitting portion, there is a problem that the design is impaired.

  Further, in order to widen the light emission range, the light source and the light emitting region must be spaced apart to disperse the light, and it is necessary to increase the depth of the operation device. As a result, there was a problem that the entire apparatus would be increased in size.

  This invention solves the said conventional subject, and it aims at providing the heating cooker which can light-emit a light emission part widely, without lengthening, using a point light source.

The heating cooker of the present invention includes a heating chamber provided in a casing, a door provided to be openable and closable at a front opening of the heating chamber, and a movable part that is pressed at the time of operation provided on the front surface of the door. A light emitting part disposed on an outer periphery of the movable part to transmit light, a housing to which the movable part and the light emitting part are attached, a light diffusion part formed on the housing opposite to the movable part, and the door A circuit board provided in the circuit board, and an LED and a switch attached to the circuit board, wherein the switch is arranged to close the contact point by pressing the movable part, and the LED At the substantially central portion of the surface projected in the housing direction and collected at one place and attached to the circuit board, when the LED emits light, the light from the LED is diffused between the rear surface of the movable portion and the light diffusion Between departments Spreads repeatedly reflected, and transmitted through the light-emitting portion, it is intended to illuminate the front face of the movable portion.

  Thereby, it is possible to widely emit the light emitting unit without using a point light source without increasing the depth.

  According to the heating cooker which concerns on this invention, the visibility of the movable part for operation and operativity can be improved.

The front view of the microwave oven with an oven function as a heating cooker in Embodiment 1 of this invention The partial exploded perspective view of the operation display part of the microwave oven shown in FIG. The perspective view of the start key of the microwave oven shown in FIG. Lower longitudinal section of the door of the microwave oven shown in FIG.

  1st invention is the heating chamber provided in the housing | casing, the door provided in the front opening part of the said heating chamber so that opening and closing was possible, the movable part pressed at the time of operation provided in the front surface of the said door, A light emitting portion disposed on an outer periphery of the movable portion and transmitting light; a housing in which the movable portion and the light emitting portion are attached; a light diffusion portion formed in the housing opposite to the movable portion; and in the door A circuit board provided; and an LED and a switch attached to the circuit board, wherein the switch is arranged to close a contact point by pushing the movable part, and the LED moves the movable part toward the housing. And is attached to the circuit board at a substantially central portion of the surface projected onto the circuit board, and when the LED emits light, the light from the LED emits light from the back surface of the movable portion, the light diffusion portion, and Reflection between Spread return Ri, is transmitted through the light-emitting portion is intended to illuminate the front face of the movable portion.

  According to a second invention, in the first invention, the light diffusion portion is formed so as to spread in a trumpet shape toward the movable portion.

  According to a third invention, in the first invention, the back surface of the movable portion and the front surface of the light diffusion portion are toned and molded in a color that easily reflects light.

  According to a fourth aspect of the present invention, only one switch is arranged at a position deviating from a substantially central portion of the surface projected in the housing direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view of a microwave oven with an oven function as a heating cooker according to Embodiment 1 of the present invention, FIG. 2 is a partially exploded perspective view of an operation display unit of the microwave oven shown in FIG. 1, and FIG. 1 is a perspective view of a start key of the microwave oven shown in FIG. 1, and FIG. 4 is a lower longitudinal sectional view of a door body of the microwave oven shown in FIG.

  The microwave oven 1 with an oven function (hereinafter referred to as a microwave oven 1), which is a heating cooker according to the first embodiment, is provided with a heating chamber 3 in a substantially rectangular parallelepiped housing 2, and the heating chamber 3 includes a housing. A front opening 4 is provided on the front surface of the body 2. A flange 5 is formed on the entire circumference of the front opening 4. A door 6 is attached to face the front opening 4 and the flange 5.

  In the present embodiment, the front opening 4 side of the heating chamber 3 is the front, the right side is the right from the front to the rear, the left is the left from the front toward the housing 2, and the following Will be explained.

  The door 6 is pivotally supported on the housing 2 by a rotation shaft provided in the horizontal direction, and is configured to be able to open and close the front opening 4. A handle 7 is provided on the upper portion of the door 6, and a user of the microwave oven 1 can open and close the handle 6 by rotating the door 6 in the vertical direction by grasping the handle 7 with a hand.

  A bottom plate is provided on the bottom surface of the heating chamber 3, and a heated object such as food can be placed on the bottom plate.

  Below the heating chamber 3, an electric chamber 8 is provided. The electric chamber 8 is provided with a magnetron (not shown) that oscillates microwaves, and a magnetron driving power source (not shown) that supplies electric power to the magnetron. The waveguide transmits the microwave generated by the magnetron to the heating chamber 3.

  A convection heater (not shown), which is a heat source, is disposed behind the inner surface of the heating chamber 3. The convection heater is disposed in a coiled state in a sealed space formed adjacent to the rear of the back surface of the heating chamber 3. A circulation fan is provided in the center of the convection heater. By rotating the circulation fan, the air in the heating chamber 3 is sucked from the intake hole, heated by the convection heater, and returned to the heating chamber 3 from the exhaust hole again. Thereby, a to-be-heated material is uniformly heated at high temperature.

  On the upper surface side of the heating chamber 3, an upper heater (not shown) as a heat source is provided. When the upper heater generates heat, the object to be heated in the heating chamber 3 can be radiantly heated to burn the surface of the food.

  A steam generation part (not shown) for generating steam is provided on the outer surface of the left side wall of the heating chamber 3. A water tank 8 for generating steam to be sent to the heating chamber 3 is attached below the heating chamber 3 so as to be removable. The water in the water tank 8 is supplied to the steam generation unit and becomes steam. The generated steam is supplied to the heating chamber 3 by a steam pipe that connects the steam generating unit and the heating chamber 3.

  A touch liquid crystal panel 10, a return key 11, a cancel key 12, and a start key 13, which are operation display units 9, are arranged in a substantially rectangular area on one side of the door 6 when viewed from the front.

  The touch liquid crystal panel 10 is disposed at the top of the substantially rectangular area. The touch liquid crystal panel 10 is used by a user of the microwave oven 1 to input a predetermined operation related to cooking. The surface of the touch liquid crystal panel 10 is formed of a resin thin plate, for example, a substantially rectangular sheet-like panel made of PMMA (acrylic) resin and having a thickness of 1.5 mm. The state of operation input to the panel 10 and the cooking status are displayed. A circuit board 14 for driving the touch liquid crystal panel 10 is provided behind the touch liquid crystal panel 10 (the housing side).

  In the lower area of the touch liquid crystal panel 10, a return key 11 and a cancel key 12 are arranged side by side. A start key 13 for starting a cooking operation is attached to the area below the return key 11 and the cancel key 12. The start key 13 is provided with a movable part 15 to be pushed by the user and a light emitting part 16 disposed around the movable part 15.

  The substantially rectangular region to which the operation display unit 9 is attached is arranged so that most of the region overlaps the front opening 4 when a cross section of this region is projected onto the housing 2 side.

  The door 6 has a transmission window 23 and a handle 7. A touch liquid crystal panel 10 is attached to the right side of the door 6. The touch liquid crystal panel 10 is mounted on the circuit board 14.

  The operation display unit 9 assembled by laminating a plurality of components includes a touch liquid crystal panel 10, a return key 11, a cancel key 12, and a start key 13, and is provided along the vertical side portion of the door 6. An air path (not shown) is formed in the operation display unit 9 in the vertical direction. This air path is formed around the circuit board 14. The air passage leads to the outside, and is configured such that external air flows into the air passage.

  The start key 13 includes a housing 17 disposed behind the movable portion 15 and the light emitting portion 16. The housing 17 is formed in a trumpet shape toward the front. A switch 18 and an LED 19 (light emitting diode) as a light source are arranged behind the housing 17. The switch 18 and the LED 19 as a light source are attached to the circuit board 14.

  A light guide space is provided between the movable portion 15 and the housing 17. The back surface of the movable portion 15 and the front surface of the housing 17 are toned and molded in white to make it easier to reflect light. Note that the color is not limited to white, and other colors may be used as long as they easily reflect light.

  The light emitting unit 16 is half mirror plated. The light emitting unit 16 is disposed behind the sheet-like panel 20 attached to the surface of the operation display unit 9. When the LED 19 is not emitting light, the light emitting portion 16 has a glossy plating color. When the LED 19 emits light, the light emitting area is circular. The design can be improved by emitting light evenly in the shape.

  When the LED 19 emits light, the light repeats reflection on the back surface of the movable portion 15 and the light diffusing surface inclined in the trumpet shape on the front surface of the housing 17, spreads the light guide space to the outside, and proceeds to the light emitting portion 16.

  Next, the operation of the microwave oven 1 having the above configuration will be described.

  The user operates the touch liquid crystal panel 10, the return key 11, and the cancel key 12 to input and set cooking conditions. When the setting is completed, the light emitting unit 16 emits light, and the user can easily recognize the movable unit 15 and prompt the user to operate it.

  Moreover, in the microwave oven 1, since the operation display part 9 is arrange | positioned at the side of the door 6, compared with the case where it arrange | positions in the lower part of the door 6 like the conventional structure, the touch liquid crystal panel 10 is provided. The return key 11, the cancel key 12, and the start key 13 are attached at a high position, and visibility and operability are improved. In particular, when the housing 2 is built in the lower part of the kitchen, it is not necessary to bend for the operation of the touch liquid crystal panel 10, the return key 11, the cancel key 12, and the start key 13, and a remarkable effect is obtained.

Further, since the edge in the width direction of the operation display unit 9 overlaps the heating chamber 3, it is not necessary to increase the size of the housing 2. In the heating chamber 3 of the same size, if the edge in the width direction of the operation display unit 9 is set so as not to overlap the heating chamber 3, the operation display unit 9 protrudes outward from the vertical side of the housing 2 by that amount. To do. If the wall thickness of the housing 2 is increased in accordance with the protrusion, the housing 2 is increased in size. This configuration avoids such an increase in the size of the casing 2 by overlapping a part of the operation display unit 9 on the heating chamber 3.

  With this configuration, when the LED 19 emits light, the light is first reflected by the back surface of the movable portion 15 facing the LED 19 and further reflected by the light diffusion surface 21 facing the LED 19. The reflected light is repeatedly reflected and spread between the back surface of the movable portion 15 and the light diffusion surface 21, passes through the light emitting portion 16, and illuminates the front surface of the movable portion 15. Since the light emitting unit 16 is irradiated with the reflected light, even if the LED 19 is a point light source, the light emitting unit 16 can emit light to the end in the entire area, and does not take a large depth for spreading the light. Even in this case, the light emitting region is uniform in a circular shape, and the design can be improved.

  And the protrusion part 22 is formed in the back side of the movable part 15, and it is comprised so that the mechanical contact type switch 18 installed on the outer side of LED on the circuit board 14 can be pressed down. As described above, the light source is provided near the center on the back side of the movable portion 15, and the LED 19 is disposed on the circuit board 14 near the center of the movable portion 15, so that the switch 18 is located near the center of the movable portion 15. It is difficult to arrange.

  Therefore, since the movable portion 15 has a large projected area in the direction of the heating chamber 3 when viewed from the front, if the switch 18 is disposed only on one end side, the operability is poor, and the movable portion 15 is movable on the side without the switch 18. By providing the protrusion 22 at the end of the back side of the part 15, on the side where the switch 18 is not provided, the movable part 15 is made to come first, and the switch 18 is pushed in. Even when the location is pressed, the configuration is such that the input state is maintained without deteriorating the operability, so that the visibility is improved and the space for disposing the movable portion 15 of the start key 13 is increased as much as possible. This is an efficient arrangement method.

  In addition, since the light emitting unit 16 provided outside the movable unit 15 is lit or blinked, the operation is facilitated and an erroneous operation is less likely to occur.

  Since it was configured as above,

  The present invention can be widely applied to an operation unit of a device that uses a point light source.

2 Housing 3 Heating chamber 4 Front opening 6 Door 9 Operation display section 15 Movable section 16 Light emitting section 17 Housing 18 Switch 19 LED
21 Light diffusion surface

Claims (4)

A heating chamber provided in the housing, a door provided to be openable and closable at the front opening of the heating chamber, a movable portion provided on the front surface of the door to be pressed during operation, and disposed on the outer periphery of the movable portion A light-emitting part that transmits light, a housing in which the movable part and the light-emitting part are attached, a light diffusion part formed in the housing opposite to the movable part, and a circuit board provided in the door; An LED and a switch attached to the circuit board,
The switch is arranged to close the contact point by pushing the movable part, and the LED is collected at a substantially central part of the surface of the movable part projected in the housing direction and attached to the circuit board. And
When the LED emits light, the light from the LED is repeatedly reflected and spread between the back surface of the movable part and the light diffusion part, passes through the light emitting part, and illuminates the front surface of the movable part. vessel.   The cooking device according to claim 1, wherein the light diffusion portion is formed so as to spread in a trumpet shape toward the movable portion.   The cooking device according to claim 1, wherein the back surface of the movable portion and the front surface of the light diffusion portion are toned with a color that easily reflects light. 3. The cooking device according to claim 1, wherein only one switch is disposed at a position deviating from a substantially central portion of a surface of the movable portion projected in the housing direction.

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