JPH0835672A - Heating and cooking device - Google Patents

Abstract

PURPOSE:To provide an operation panel in which an operating button is set to such a superior operating state and a displaying part is arranged at an easy- to-see state and then to improve an outer appeararfce as well as a convenienc of use. CONSTITUTION:A groove 32 of an operating button 1 is engaged with a circular rib 30 formed at an inner edge of a window hole of a displaying plate 6 and then the operating button 1 is position set at a center of the window hole. In turn, a rib abutted against a rear surface of the displaying plate is arranged within a displaying window hole of a panel frame 3 to which the displaying plate is fixed with engaging claws and engaging holes so as to prevent the displaying plate 6 from being indented and at the same time the rib is extended like eaves above the displaying device so as to prevent vapor from entering the device and so as to prevent a clouding at the displaying part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker for cooking an object to be cooked in a heating chamber by high-frequency heating or heater heating, and more particularly to a structure of an operation panel for inputting heating conditions and the like.

[0002]

2. Description of the Related Art Conventionally, in a heating cooker having a high-frequency heating device and a heater heating device, that is, an oven range, a door for opening and closing a heating chamber and various operation buttons for heating are provided on the front of the case body. Arranged operation panel is provided.

There are various types of operation buttons, such as pressing type, rotating type, and touch type. With these operating buttons, heating temperature, heating time, cooking menu selected by automatic heating, and further heating start , Various functions such as stop, and heating conditions can be set and input.

Here, the operation panel is, for example, Japanese Unexamined Patent Publication No.
As shown in No. 80527, it is generally composed of a panel frame body in which the operation buttons are arranged and attached, and a display plate attached to the front surface of the panel frame body and covering a display window formed in the panel frame body. The display plate is attached so that the locking claws attached to the display plate are engaged with the locking holes on the panel frame side.

By the way, in the case of the dial type operation button 1 as shown in FIG. 2 which is provided so as to project from the display plate and is rotated left and right, the mounting hole 2 of the operation button 1 is conventionally provided as shown in FIG. A circular rib 4 is formed in the provided panel frame body 3 so as to surround the mounting hole 2, an annular groove 5 formed at the base of the operation button 1 is engaged with the rib 4, and the display plate 6 is attached. A window hole 9 formed in the display plate 6 by mounting the locking claw 7 and the engaging hole 8 on the panel frame body 3 by the mounting method as described in the above publication.
The mounting method is such that the operation button 1 is further projected.

However, with this mounting method, the dimensional variation between the locking claw 7 and the locking hole 8 or the panel frame of the display plate 6 when the locking claw 7 and the locking hole 8 are not uniformly locked. A difference occurs in the attachment state to the body 3, so that the window hole 9 and the operation button 1 do not completely match, the position is displaced, and the operation button 1 is not positioned in the center of the window hole 9.

On the other hand, the structure of the upper portion of the display plate 6 covering the display window hole 11 is as shown in FIGS. 7 and 8, and the back of the panel frame 3 shows the cooking conditions such as heating time and heating temperature and the situation. A light emitting display device 12 such as a fluorescent display tube or an LED to be displayed is disposed close to the display window hole 11, and a packing 13 is provided between the front edge of the light emitting display device 12 and the back surface of the display plate 6.
Is attached, the steam generated from the object to be cooked at the time of heating enters the machine room containing the magnetron and the control parts of the electric system from the heating chamber, and the display device 12 and the display plate 6 are not fogged by the steam. As described above, this packing 13 is used for prevention.

Here, since the display plate 6 is a thin sheet made of translucent resin, it is easily bent, and therefore the upper portion 6a facing the display window hole 11 which is an opening is rearward with a slight external pressure. There is a concern that the depressions may make it difficult to see the displayed contents or impair the appearance.

[0009]

As described above, the conventional dial-type operation button has a mounting structure in which it is positioned by engaging with the rib on the panel frame, and therefore, the operation is not performed with the window hole of the display plate. There is a drawback that the center position of the button does not coincide with the position of the button and the button is displaced, so that the dial operation cannot be performed smoothly and the appearance of the operation panel is deteriorated.

Also, since the display plate is thin and flexible, the upper part of the display plate easily falls back when pressed when assembled to the panel frame body or after being mounted, thereby making it difficult to see the display. In addition to the problem, there is a problem that packing is required to prevent the display part from being fogged by invading steam, the number of parts is large, and the packing is mounted in a narrow space, so that the assembling workability is poor.

The present invention has been made in view of the above points,
The operation button can be attached to the center of the window of the operation panel, which improves the operability and appearance of the operation panel, and enables stable installation of the display board, and also prevents the display section from becoming frosted. An object of the present invention is to provide a user-friendly cooker in which the displayed contents can be surely seen by making it possible to achieve with a simple configuration.

[0012]

According to the present invention, there is provided a heating chamber formed in a case body having a high-frequency heating device and a heater heating device built therein, and an opening / closing door provided for loading and unloading food to and from the heating chamber. A heating cooker including a display unit provided on the front surface of the case body provided with the opening / closing door and an operation panel having a plurality of operation buttons, wherein the operation panel has a concave portion formed on the front surface. It is composed of a panel frame body in which a mounting hole and a display window hole are formed in the operation button, and a sheet-like display plate fitted in the concave portion of the panel frame body and having a window hole through which a predetermined operation button is projected. On the other hand, a circular rib is formed so as to project on the peripheral edge of the window portion on the back surface of the display plate, and the predetermined operation button engages the annular groove formed at the base of the rib with the rib. Is to be held by

Further, according to the present invention, a rib is formed in the upper portion of the display window hole so as to come into contact with the upper back surface of the display plate.

Further, according to the present invention, the rib is formed so as to cross the display window hole and extends rearward in an eaves shape.

[0015]

[Operation] On the display plate fitted on the front surface of the panel frame,
The operation button can be positioned at the center of the window hole by providing a circular rib on the periphery of the window hole through which the operation button projects and engaging an annular groove formed in the operation button with this rib. In this way, since the display plate which holds the operation button at the center of the window hole from the beginning is assembled to the panel frame body, the position shift of the operation button due to the attachment does not occur.

In the sheet-like display plate, the upper portion thereof facing the display window hole provided in the panel frame is apt to be recessed by a slight external force, but a rib for abutting against the back of the display plate is provided in the display window hole. It is provided and supported to maintain its strength, and is dented so that the displayed contents are not difficult to see.

Further, the rib is formed in a shape that horizontally extends in the shape of an eave to the back and covers the upper portion of the display device arranged corresponding to the display window hole, so that the vapor discharged from the object to be heated and flowing from the heating chamber. To prevent the display from becoming cloudy.

[0018]

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

Numeral 15 is a heating cooker called an oven range capable of selectively heating the object to be cooked by high frequency heating and heating by a heater, and a heating chamber and a machine chamber are formed in the case body 15a by partitions. ing. An opening / closing door 17 which is opened vertically by a handle 16 provided on the front side of the heating chamber is provided, and an operation panel provided with a display section 18 and operation buttons 1 and 19 on the front side corresponding to the machine room. 21 is provided. Here, in the machine room, a magnetron and its peripheral circuit parts constituting a high frequency generator, a control device including a microcomputer, a cooling fan for introducing outside air and cooling the magnetron, etc. are housed. A heater device is installed at the bottom or top of the heating chamber.

As shown in FIG. 2, the operation panel 21 has a rectangular-shaped mounting hole 23 for mounting the display window hole 11 and the push-type operation button 19 in a concave portion 22 formed on the front surface.
And a panel frame 3 having a circular mounting hole 2 for mounting the dial type operation button 1, and the concave portion 22.
And a plurality of locking claws 7 provided on the display plate 6 formed around the concave surface portion 22. The display plate 6 can be attached to the panel frame 3 by engaging with the stop hole 8.

The display plate 6 is a double-layered product composed of a translucent resin plate material and an opaque, for example, gray sheet attached to the surface of the plate material. Holes of the same shape and size that are opposite to the mounting holes 23 and 2 are formed, and on the other hand, the sheet has a rectangular shape corresponding to the display window hole 11 covered with the translucent plate material. A cutout window portion 9 is formed in a circular shape so that the cutout window portion 26 is formed and the dial type operation button 1 can be projected. The hole 27 exposed by the rectangular operation button is covered with this thin sheet, and the structure is such that a touch operation capable of pressing the operation button through the sheet is possible.

By the way, in the display plate 6, a circular rib 30 is integrally formed on the rear edge of the circular window hole 9 as shown in FIG. On the other hand, in the dial type operation button 1, a collar portion 31 in which an annular protruding edge 31a is erected is formed at the base thereof, and an annular concave groove 32 is provided between the operation button 1 and the outer peripheral side surface.

Therefore, the operation button 1 is inserted into the window hole 9 from the back side of the display plate 6 so that the concave groove 32 and the rib 30 are engaged with each other. In this way, the operation button 1 can be attached to the display plate 6 while being located in the center of the window hole 9. Therefore, after this, the display plate 6 to which the operation button 1 is attached is held by the panel frame body 3.
The operation button 1 can be fitted into the mounting hole 2 of the panel frame body 3 by fitting it on the front surface of the panel, and the operation button 1 can be mounted so that it can be smoothly rotated left and right without any trouble.

As described above, the operation button 1 is positioned toward the display plate 6 at the center of the window hole 9 facing the display plate 6, and the display plate 6 is assembled to the panel frame body 3. It is possible to solve the problem that the operation button 1 which is often generated when the display plate 6 is attached to the panel frame body 3 from which the display plate 1 projects so as not to be located at the center of the window hole 9 of the display plate 6.

Next, it is possible to prevent the problem that the upper portion of the display plate, which is fitted in the concave portion of the panel frame body, facing the display window hole is dropped, and at the same time, the packing is not required to prevent the invasion of steam, thereby making the display device cloudy. A configuration according to the second invention capable of achieving the stop will be described with reference to FIGS. 4 and 5.

A rectangular display window hole 11 is formed in the upper part of the panel frame 3 made of resin, and a circular mounting hole 2 for mounting the dial type operation button 1 is formed in the lower part. It is formed by drilling. Further, the front surface of the panel frame body 3 is recessed to form a concave surface portion 22 into which the display plate 6 is fitted. 12 is a panel frame body 3 so as to face the display window hole 11.
A display device such as a fluorescent display tube or an LED arranged on the back side of the device displays the heating time, the heating temperature, etc. digitally, and the contents of heating, conditions, etc. are displayed in characters. The display device 12 is attached to the substrate 33, and lead terminal pieces 34 provided on the display device 12 are connected to a circuit formed by printing on the substrate 33.

The display plate 6 is a sheet-like and flexible structure having the same structure as the display plate in the above-mentioned first invention, and has a window portion 26 for display and a window hole 9 through which the operation button 1 is projected. Locking claw 7 that has and that engages with the engaging hole 8 of the panel frame 3
have.

Here, when the display plate 6 is fitted and attached to the concave surface portion 22 of the panel frame body 3 by the locking claw 7 and the engagement hole 8, the upper portion 6a of the display plate 6 where the window portion 26 is present is Since it is removed from the surface wall 22a of the concave portion 22 corresponding to the opening of the display window hole 11 and serves as a support surface, it is easily depressed toward the display window hole 11 when pushed.

Therefore, a rib 36 is provided on the upper portion of the display window hole 11.
Is provided so that the upper portion of the back surface of the display plate 6 contacts the rib 36. By doing so, the ribs 36 are also formed on the upper portion of the display board 6.
It is supported from the back and can be prevented from denting to the back. Therefore, the display plate 6 can be stably attached and the displayed contents can always be observed well.

Although the ribs 36 are horizontal ribs that cross the display window hole 11 in this embodiment, the ribs 36 are not limited to such ribs. For example, a plurality of ribs vertically extended from the upper edge of the display window hole 11 may be used.
It may have a structure in which it is arranged laterally at an appropriate interval, and the point is that a rib that comes into contact with the upper back surface of the display plate 6 is provided in the display window hole 11.

By the way, in the microwave oven, during high frequency heating, the cooling air of the magnetron is introduced into the heating chamber and exhausted to the outside. Therefore, the steam released from the food to be cooked by heating is exhausted to the outside together with the air. However, since the magnetron does not operate when the heater is heated, the cooling fan is also stopped and no air is blown. Therefore, the steam released from the food to be cooked enters from the heating chamber side to the machine room side through the ventilation holes passing through the heating chamber and the machine room, and the steam causes the window portion 26 to be clouded, which makes it difficult to see the displayed contents. In order to prevent this, packing 13 is conventionally used.

On the other hand, in the present invention, the rib 36 is horizontally extended rearward to form the eaves portion 36B which becomes the ceiling of the display device 12, and the tip of the eaves portion 36B is brought into contact with the substrate 33. To do.

The presence of the ribs 36 covering the display device 12 in this manner prevents the invading vapor from invading the space in which the display device 12 is present, and the vapor causes the window portion of the display device 12 and the display plate 6 to enter. 26 It is possible to effectively prevent the back surface from becoming cloudy even without the packing 13. Although not shown, since side walls are provided inside the panel frame body 3 so as to face both left and right sides of the display device 12, invasion of steam from that direction is also prevented.

By the way, the eave portion 36B of the rib 36 is
Static electricity generated by touching the operation panel 21 with a hand or finger adversely affects the control device, for example, a false signal is input to the microcomputer,
The effect of preventing malfunction can also be obtained. That is, in the case of the conventional structure shown in FIG. 8 without the ribs 36, when static electricity flows from the human body by touching the operation panel 21, it propagates along the surface of the display plate 6 and from the joint portion 37 with the case body 15a to the panel frame body 3. Flowing.

Here, since the terminal piece 34, which is a conductive member, is close to the panel frame 3, static electricity is discharged to the terminal piece 34, and an erroneous signal is input to the microcomputer via the circuit of the board 33 to control. There is a concern that the reliable operation of the system will be lost.

However, in the structure of the present invention shown in FIG. 5, after the static electricity flows to the panel frame 3, the eave portion 36B of the rib 36 is interposed between the terminal piece 34 and the terminal piece 34. While static electricity is suppressed from being discharged to the terminal piece 34, the static electricity is transmitted to the substrate 33 through the eaves portion 36B. Then, the static electricity is reduced while flowing through the eaves portion 36B, and it is possible to prevent malfunction of the microcomputer or the like. When the eave-shaped rib 36 is provided so as to cover the upper side of the terminal piece 34 in this way, the creepage distance in which static electricity flows along the surface from the operation panel 21 to the substrate 33 can be lengthened, and as a result, discharge or component The static electricity transmitted through can be weak,
The adverse effect of static electricity can be effectively reduced and reliability can be improved.

[0037]

As described above, according to the present invention, a rib is provided around the window hole of the display plate attached to the surface of the panel frame, and the annular groove provided in the dial type operation button is engaged with the rib. Since this display plate is attached to the panel frame by combining them, it is possible to assemble an operation panel in which the operation button is always located in the center of the window hole and protrudes, improving the appearance and smoothing the operation button. The operability is also secured and the usability is good.

Further, a rib is provided in the display window hole of the panel frame which is covered with the display plate, and the rib comes into contact with the upper back surface of the display plate and falls into the display window hole even if the display plate is pushed during use. Since it is not provided, the displayed contents can be always viewed well, the display board can be securely attached, and the durability of the operation panel is increased.

Further, since the rib is formed so as to extend rearward in the shape of an eaves to cover the display device such as the fluorescent display tube located therebelow, the vapor emitted from the object to be heated enters the storage space of the display device. The display device on the front surface of the display device can be prevented from being fogged due to steam, and the packing used in the past can be eliminated, the number of parts can be reduced, and the cost and the assemblability can be improved. It is possible to achieve various effects.

[Brief description of drawings]

FIG. 1 is an external perspective view of a heating cooker according to the present invention.

FIG. 2 is an exploded perspective view of components of an operation panel provided in the heating cooker.

FIG. 3 is a side sectional view of a main part of the operation panel.

FIG. 4 is an exploded perspective view of components of an operation panel according to a second aspect of the present invention having a rib on a display unit.

FIG. 5 is a side sectional view of a main part of a display unit of the operation panel.

FIG. 6 is a side sectional view of an essential part of an operation panel for explaining a conventional mounting structure of a dial type operation button.

FIG. 7 is an exploded perspective view of components of the operation panel.

FIG. 8 is a side sectional view of a main part of a display unit of the operation panel.

[Explanation of symbols]

 1 dial type operation button 2 mounting hole 3 panel frame 6 display plate 7 locking claw 8 locking hole 9 window hole 11 display window hole 12 display device 17 opening / closing door 21 operation panel 22 concave surface portion 30 circular rib 32 concave groove 36 ribs

Claims (3)

[Claims] 1. A heating chamber formed in a case body having a built-in high-frequency heating device and a heater heating device, an opening / closing door for loading and unloading food to and from the heating chamber, and the opening / closing door provided above. In a heating cooker provided with a display unit provided on the front surface of a case body and an operation panel having a plurality of operation buttons, the operation panel has a concave portion formed on the front surface, and a mounting hole for the operation button and a display window hole. And a sheet-like display plate fitted with the concave portion of the panel frame and having a window hole through which a predetermined operation button is projected. A circular rib is formed so as to project from the periphery of the window portion, and the predetermined operation button is configured such that an annular groove formed at the base thereof is engaged with the rib to be held by the display plate. And cooker. 2. The cooking device according to claim 1, wherein a rib that abuts against the upper back surface of the display plate is formed in an upper portion of the display window hole. 3. The heating cooker according to claim 2, wherein the rib is formed so as to cross the display window hole and extends rearward in an eaves shape.