JP2554482Y2 - Switch structure of door for high frequency heating device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch structure of a door for a high-frequency heating device.

[0002]

2. Description of the Related Art In a recent high-frequency heating device such as a microwave oven, a configuration in which a frequently used operation switch is provided separately from an infrequently used operation switch is being studied.

[0003]

However, when an operation switch that is frequently used is separately provided as described above, the problem is how to install the operation switch and the structure of the operation unit. The structure and installation location must be determined in consideration of improving the heat resistance, visibility of the operation unit, and operability.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and is directed to a door of a high-frequency heating apparatus having a viewing window on a front panel surface. Bulging outward from both the upper and lower directions toward the center, thereby forming a bulging space inside and positioning the viewing window in the left-right direction of the outer bulging surface, and operating buttons immediately below the viewing window. And the like, the operation surface of the operation button is protruded from the panel surface of the front panel, and the operation switch board of the operation button is provided in the bulging space.

[0005]

As described above, in the switch structure of the door for the high-frequency heating device of the present invention, the front panel of the door is bulged outward from both the upper and lower directions toward the center, and the inside thereof has heat insulation. A bulging space is formed. An operation switch board and an operation switch can be provided by using the heat-insulating bulging space.

Further, since the operation buttons are provided immediately below the viewing window as described above, the operation buttons can be easily operated while looking into the heating chamber from the viewing window. In addition, since the operation surface of the operation button is protruded from the panel surface of the front panel, the operation button itself can be easily seen, and the operation surface can be easily operated with, for example, a fingertip. Of course, the protruding operation surface can be easily operated without erroneous operation only by the palm or the tip of the elbow.

[0007] Therefore, it is possible to operate the apparatus while holding a pot in both hands during cooking, and it is also convenient for a physically handicapped person who has difficulty in fingertips.

Further, in the invention of the present application, the front panel is bulged outward from both the upper and lower directions toward the center as described above, and the viewing window is positioned on the outer bulge surface in the left-right direction. Therefore, the heating chamber can be seen from the outer bulging surface, and the heating chamber can be easily seen. Also, in that case, since the above-mentioned heat insulating space can be formed large in the viewing window portion located on the outer side bulging surface, even when the heating chamber is viewed close to the viewing window, the heat insulating space can be used. By the action, the safety is high.

[0009]

As a result, according to the switch structure of the door for the high-frequency heating device of the present invention, the front panel having the viewing window is bulged from the vertical direction toward the center as described above. By effectively utilizing the bulging space inside the formed front panel, operation switches are installed, and the operation switches are safe, easy, and easy to use. At the same time, the viewing window is easy to see and secure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) First Embodiment FIGS. 1 to 4 show the configuration of a high-frequency heating apparatus with an oven function according to a first embodiment of the present invention having an operation switch on a door portion.

First, FIG. 1 shows the overall structure of the high-frequency heating device, wherein reference numeral 1 denotes a range main body 1 of the high-frequency heating device, and reference numeral 2 denotes an inside of the range main body 1. It is a heating chamber (space in a refrigerator) having a predetermined volume and formed with an upper heater 3 on the ceiling. A convex shelf receiver is provided on both side wall surfaces 2a and 2b of the heating chamber 2, and a predetermined cooking dish (not shown) is moved from the front side to the rear side using the left and right shelf receivers. , And are supported vertically in parallel.

A turntable 4 is rotatably provided at the bottom of the heating chamber 2.

A small space 5 for installing a magnetron 6 and other devices is formed at one side (right side in the figure) 8 of the range main body 1 as shown in the figure.

On the other hand, reference numeral 10 denotes a door which is located at an opening on the front side of the range main body 1 constructed as described above and which is provided via a hinge from the upper side to the lower side so as to be opened and closed. As shown in detail in FIGS. 2 and 3, for example, the door 10 bulges out of the synthetic resin outward in the front side so as to have a gentle cross-sectional shape in the shape of a gentle cross from both the upper and lower directions toward the center. Outer (front side) panel (cover panel) formed by molding
And a central portion which is located inside the outer panel 11 and is coupled to the outer panel 11 so as to face each other and forms a bulging space 12 having a predetermined closed cross-sectional structure formed therebetween. Metal inner panel with opening (body panel)
A metal punching plate 14 for shielding electromagnetic waves is joined to the inner panel 13 and further to the range main body side (heating chamber 2 side) of the inner panel 13 so as to correspond to the opening surface on the range main body 1 side. In particular, the punching plate 14 has a sealing surface portion 14a on its peripheral edge, which is in uniform surface contact with the peripheral edge 7 of the opening portion on the side of the range main body 1.

Further, a peripheral edge of the inner panel 13 corresponding to the opening peripheral edge 7 of the range main body 1 is formed in a state in which a concave groove 15 which is concave in an outward direction is connected endlessly. A choke structure 16 for the opening electromagnetic wave shield is formed and extends endlessly throughout. A door switch 17 for detecting the open / closed state of the door 30 is attached to an upper position of the concave groove 15 with a notch cover.

Reference numeral 19 denotes a door opening / closing operation handle formed by recessing a part of the upper side panel portion of the outer panel 11 inward (toward the heating chamber 2). It has an inclined structure that is slightly raised upward so that it is easy to insert and an appropriate engaging force is obtained after insertion, and is formed with a locking edge 19a.

Reference numeral 20 denotes a hinge portion which is connected between the lower end portion 10a of the door 10 and the lower end portion 1a of the range main body 1 to support the door 10 so that it can be opened and closed in the vertical direction.

The hinge portion 20 includes a first hinge lever 20a fixed to the inner panel 13 and the range body 1
The second hinge lever 20b fixed to the side is connected and supported in common by a hinge shaft portion 20c, thereby supporting the door 10 so that it can be opened and closed in the vertical direction as described above. .

The door 10 is provided with a lock lever 20 provided on the range body 1 corresponding to the hinge portion 20.
d is locked in the closed state. The lock lever 20d is constantly urged in the lock direction by a lock spring 21, and the lock state is automatically released by opening the door 10.

Further, the outer panel 1 of the door 10
1 has an opening 23 for forming a viewing window and openings 25a to 25f for installing the first to fifth operation buttons, which are located in the left-right direction of the outward bulging surface located vertically above and below the substantially central portion. 25e
Are respectively formed. The opening 23 for forming the viewing window is located at least above the substantially central portion,
The heating chamber 2 is formed in a size large enough to allow the inside of the heating chamber 2 to be seen. A transparent synthetic resin plate 24, which is a window plate, is fitted and fixed to the opening 23 along the curved surface of the bulging surface. The window is formed with a wide viewing angle. Therefore, the punching hole 14a of the punching plate 14 is also limited to the width of the viewing window and
It is formed only in the part. The first to fifth operation button setting openings 25a to 25e are respectively disposed immediately below the viewing window forming opening 23, and the first to fifth operation buttons are respectively provided. As shown in FIG. 2, the buttons 31a to 31e are slidably fitted from the back side freely, and the front operation surface thereof is projected forward by a predetermined length from the panel surface of the outer panel 11, and the elastic support plate 26a moves forward. It is held so as to be able to move back and forth while being pressed and biased to the side.

Each of the operation buttons 31a to 31e is formed of a circular transparent resin member having a lens function protruding from the center as shown in the figure, and the elastic support is formed by using an engagement edge formed on the back side thereof. The upper surface of the plate 26a is fixedly engaged with the light transmitting surface portion. The translucent surface portion of the elastic support plate 26a includes:
The operation buttons 31a to 3 have an uneven surface and transmit light.
It spreads out evenly to the 1e side and goes out.

Each of the operation buttons 31a to 31e is formed to have a diameter D larger than an average human finger width W (normally 1.5 cm to 2 cm) as shown in FIG. At the same time, the installation interval S between them is also set to be larger than the width W of the finger.

The elastic support plate 26 has its base side fixed to the lower part of a box-shaped switch box 36 made of synthetic resin by fastening with screws 34, and the operation button 31a is formed by the spring constant at the time of bending. 31e are elastically supported in a state of being urged so as to protrude toward the front of the door, and a push rod 27 protruding rearward is integrally provided at the upper end of the rear surface. The switch box 36 has a sufficient heat-insulating swelling space formed in the front-rear direction by swelling the outer panel 11 outward on the front side. It is installed with an insulated space.

On the other hand, a circuit board (operation switch board) 33 is attached to the inside of the switch box 36 via a support stay 29 and is fastened and fixed by screws 30.

On the circuit board 33, an ON / O signal corresponding to the push rod 27 on the elastic support plate 26a side is provided.
Operation switch for FF (hereinafter simply referred to as switch) 3
9 and a light emitting diode 32 which is turned on when the switch 39 is turned on.

Therefore, the operation buttons 31a to 31e
Is pushed from the front side to the rear side against the urging force of the elastic support plate 26a, the push rod 27 turns on or off the operating member 39a of the switch 39 to turn on the light emitting diode 32. Or turn off the light.

Reference numeral 40 denotes a heat-shielding cover which is formed in a hook shape and is provided so as to cover the whole of the switch box 36 from the upper surface to the rear surface thereof. And is fastened and fixed to the rear side of the switch box 36 by screws 41.

Thus, the upper part of the switch box 36 below the opening 23 is covered so as not to be seen from the view window side, and the radiant heat from the punching plate 14 acts on the switch box 36. It shields the heat as much as possible. Therefore, according to this configuration, an effective heat insulating structure can be realized in combination with the fact that the width of the punching hole 14b of the punching plate 14 is formed only corresponding to the opening 23 for forming the viewing window. Become like As a result, the heat of the heater in the heating chamber 2 is effectively used, and the occurrence of uneven heating due to heat dissipation loss on the door side as in the related art is eliminated. The switch box 36 is connected to the choke structure 1.
6, the thickness of the door 10 can be made as small as possible while taking the above-mentioned bulging structure (it is not necessary to make the door 10 unnecessarily thick). In addition, as a result of the above-described high heat insulating effect, the entire front side including an opening for installing a viewing window of the door 10 and an operation button (key switch), which will be described later, is made of synthetic resin. In particular, functions and effects such as improvement of processing and realization of easiness of processing, molding, and assembling are easily realized.

In the present embodiment, the outer panel 11 constituting the door 10 is swelled toward the front of the door surface at the center from both upper and lower directions to a substantially L-shaped three-dimensional surface. The operation surface of the operation buttons 31a to 31e is located just below the viewing window, which is the largest bulging surface of the part, and the operation surface of the operation buttons 31a to 31e is spherical as described above, and the diameter is sufficiently larger than the width of the operator's finger. Protruding enough, it is provided in a state with a wider interval than the width of the finger with respect to the adjacent buttons, for example, it is possible to easily confirm the position even in the hand-searching state with the palm or only the tip of the elbow, and Very easily ON /
It is configured so that an OFF operation can be performed.

That is, the front surface of the door 10 has a three-dimensional bulging surface bulging outward in a U-shape in cross section, and as such, it is very easy to fit into the palm of the hand and has the highest height. The setting position can be easily confirmed even when groping, based on the line just below the viewing window in the center. In addition, a plurality of operation buttons 31a which are located immediately below the viewing window which is the highest swelling surface, have a sufficient spherical surface height and have a diameter larger than the average human finger width, and are arranged protruding.
~ 31e is provided in the horizontal direction with an appropriate spacing larger than the width of the average person's finger, so it is easy to see, of course, only the tip of the elbow with a handicapped or holding a pot with both hands Operation is also extremely easy.

As described above, in this embodiment, the door 1
The outer panel 11 is swelled outward in a V-shape from both the upper and lower directions toward the center, and a swelling space with heat insulation is formed inside. Then, the circuit board 33 on which the operation switch 39 is disposed can be provided by utilizing the heat-insulating bulging space.

Further, since the operation buttons 31a to 31e are provided immediately below the viewing window as described above, the operation buttons 31a to 31e can be easily operated while looking into the heating chamber from the viewing window. In addition, the operation buttons 31a to 31e
Since the operation surface is projected forward from the panel surface of the outer panel 11, the operation buttons 31a to 31e themselves are easy to see, and it is easy to operate the operation surface with, for example, a fingertip. The protruding operation surface can be easily operated without erroneous operation using only the palm or the tip of the elbow.

Therefore, it is possible to operate the apparatus while holding a pot in both hands during cooking, and it is also convenient for a physically handicapped person having trouble with fingertips.

Further, in this embodiment, as described above, the outer panel 11 is swelled forward and outward from both the upper and lower directions toward the center, and the viewing window is positioned in the left and right direction on the outer swelling surface. Since the heating chamber is obstructed, the heating chamber can be seen from the outward swelling surface, and the heating chamber can be easily seen. Further, in that case, since the above-mentioned heat insulating space can be formed large in the viewing window portion located on the outer side bulging surface,
Even when the heating room is viewed close to the viewing window, the safety is high due to the heat insulating effect of the heat insulating space.

As a result, according to the switch structure of the door for the high-frequency heating device of the present embodiment, as described above, the outer panel 11 having the viewing window is swelled from the vertical direction toward the center, thereby forming the outer panel. By effectively using the swelling space inside the outer panel 11 as an installation space and a heat insulating space, operation switches are installed, which is safe and easy,
Usability improves. Also, at the same time the viewing window is easy to see,
Be safe.

(2) Second Embodiment By the way, as in the first embodiment, the operation buttons 31a to 31a
When the diameter of the opening 31e is larger than the predetermined diameter as described above, the amount of displacement at the time of pressing or returning in the openings 25a to 25e naturally increases, so that play is easily generated in the fitting portion, and the ON / OFF operation is inevitable. There is a problem that the operation of (especially at the time of return) is not smooth.

In this embodiment, the problem is solved by employing a switch structure as shown in FIGS.

That is, the door 10 shown in FIGS.
Similarly to the first embodiment, the outer panel 11 is provided with an opening 23 for forming a viewing window, which is located above and below a substantially central portion thereof.
And the first to fifth operation button installation openings 25a to
25e are respectively formed. A transparent synthetic resin plate 24 is fitted and fixed to the opening 23 for forming the viewing window along its bulging shape, thereby forming a viewing window having a wide viewing angle for viewing the inside of the heating chamber 2. ing. The first to fifth operation button installation openings 25a are provided.
As shown in FIG. 6, first to fifth operation buttons 31a to 31e are slidably and loosely fitted from the back side to 25e, and the front operation surface (spherical portion) thereof projects forward by a predetermined length. In this state, it is held movably back and forth while being urged by the integral elastic support piece 26 in the forward projecting direction.

Each of the operation buttons 31a to 31e is formed of a cylindrical transparent synthetic resin member whose diameter is larger than the width of the average person's finger as shown in FIG. Utilizing the engaging edge portion, it is engaged and fixed to the front surface of the operation button body portion 38 made of a transparent synthetic resin molded body on the upper side of the elastic support piece 26b having a lens function.

The elastic support piece 26b for supporting the operation button body 38 has its base side fastened to the lower part of the box-shaped switch box 36 made of synthetic resin by fastening with screws 34. The operation button body 38 is elastically supported in a state of being urged forward by the spring constant of. Further, a push rod 27 projecting rearward is integrally provided on a rear surface of the operation button body 38.

A coil spring 37 having a trapezoidal cross section is fitted on the outer periphery of the push rod 27 as shown in FIG.
The operation button main body 38 is pressed and urged between the switch box 36 and the support plate 43 by a predetermined spring pressure in the return direction.

Therefore, according to the switch structure of the high frequency heating device door of the second embodiment of the present invention, the operation button 31
In addition to the urging force in the return direction only by the elastic support piece 26b, a certain repulsive urging force by the coil spring 37 acts on a to 31e, so that the diameter of the operation buttons 31a to 31e is temporarily reduced. Even if it is considerably increased, after being pressed, it will surely return to the original state, and the protrusion amounts of all the operation buttons will be constant. Further, a smooth pressing operation can be performed without rattling of the fitting portion.

The coil spring 37 need only be fitted to the push rod 27 of the operation button main body 38 from the back side, so that the assembling work is also easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the entire structure of a high-frequency heating device according to a first embodiment of the present invention.

FIG. 2 is an enlarged exploded perspective view of a door portion of the device.

FIG. 3 is a sectional view of a door portion of the device.

FIG. 4 is an enlarged perspective view of an operation button provided on a door of the apparatus.

FIG. 5 is a cross-sectional view illustrating a door structure of a high-frequency heating device according to a second embodiment of the present invention.

FIG. 6 is an enlarged sectional view of an operation switch section of the door.

[Explanation of symbols]

1 is a range body, 2 is a heating chamber, 3 is a heater, 10 is a door, 11 is an outer panel, 12 is a closed section space, 13 is an inner panel, 14 is a punching plate, 23 is an opening for forming a viewing window, 24 Is a transparent resin plate, 26a is an elastic support plate, 26b is an elastic support piece, 27 is a push rod,
1a to 31e are operation buttons, 36 is a switch box, 3
7, a coil spring; 38, an operation button main body; and 43, a support plate.

Claims (1)

(57) [Scope of request for utility model registration] In a door of a high-frequency heating device having a viewing window on a front panel surface, a bulging space is formed inside by expanding the front panel outward from both upper and lower directions toward a central portion. A viewing window is positioned in the left and right direction of the outer bulging surface, and an operation button or the like is disposed immediately below the viewing window, and an operation surface of the operation button is projected from a panel surface of the front panel, A switch structure for a door for a high-frequency heating device, wherein an operation switch board for the operation button is provided in the bulging space.