JP2010182526A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress small the number of components of a heating status display and attain reduction in manufacturing cost of an induction heating cooker. <P>SOLUTION: The induction heating cooker 1 is provided with a top plate 12 to mount a cooking vessel, an induction heating coil 13 of nearly disk shape which is arranged at the lower part of the top plate 12, and a heating status display 20 to display heating state by the induction heating coil 13. The heating status display 20 is provided with a long case 21 installed at the side part of the induction heating coil 13, a light guide body 40 of long shape which is housed along the length direction of the case 21, and a light source unit 41 which is installed in the case 21 and is opposed to one end 40a in length direction of the light guide body 40. Since a surface opposed to the other end 40b of the light guide body 40 on the inner face 22a of a light guide body housing part 22 formed in the case 21 is made a white reflecting surface 31, thereby, sufficient emission of light of the light guide body 40 can be obtained with the single light source unit 41. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an induction heating cooker that heats and cooks an object to be cooked accommodated in the cooking container by heating the cooking container with electromagnetic induction by an induction heating coil.

Conventionally, as shown in, for example, Patent Document 1, an induction heating cooker (so-called IH) including a top plate on which a cooking vessel is placed and an induction heating coil that heats the cooking vessel disposed below the top plate.
Cooking heater). This type of induction heating cooker has been widely used in households in recent years because it can cook fried foods, boiled foods, grilled foods, etc. with a large heating power without using gas.

Since the induction heating cooker as described above heats the cooking container by electromagnetic induction using an induction heating coil, it does not have a configuration in which a flame is actually emitted unlike a gas stove. Therefore, while accidents such as fires and burns are unlikely to occur, there is a problem that visual confirmation of the heating state such as cooking output cannot be performed.

Then, in the induction heating cooking appliance shown in patent document 1, the heating state indicator for displaying a heating state is provided in the side part of the induction heating coil. The heating status indicator includes an arc-shaped light guide plate disposed on the outer peripheral portion on the front side of the induction heating coil, and a light source component made up of an LED, a fluorescent lamp, or the like disposed so as to face an end portion in the longitudinal direction of the light guide plate. It is prepared for. According to such a heating state indicator, the top plate on the labor side of the induction heating coil in which cooking is performed can be made to emit light, and the heating state can be visually easily understood.

Japanese Patent Laid-Open No. 2003-197357

By the way, in the heating state indicator shown in Patent Document 1, in order to make the light guide plate uniformly illuminate along the longitudinal direction, one light source component is installed to face both ends in the longitudinal direction of the light guide plate. Two light source components are installed in one heating state indicator. However,
When a plurality of light source parts are used in one heating state indicator in this way, the number of parts of the heating state indicator increases accordingly, leading to an increase in manufacturing cost of the induction heating cooker. Moreover, since it is necessary to connect two light source components installed at both ends of the heating state indicator to a common circuit component, the wiring is complicated and the internal configuration of the induction heating cooker is complicated. There is also.

On the other hand, in the heating state indicator shown in Patent Document 1, it is also possible to install a mirror-like reflecting plate instead of one of the two light source components arranged to face both ends in the longitudinal direction of the light guide plate. It is. According to this, since the light reflected by the reflecting plate functions in the same manner as the light from the light source, there is an effect of causing the light guide plate to emit light uniformly along the longitudinal direction. However, even in that case, since the reflector is necessary, the types of components of the heating state indicator increase.

This invention is made | formed in view of the above-mentioned point, The objective is providing the induction heating cooking appliance which can suppress the number of parts of a heating condition indicator few, and can aim at reduction of manufacturing cost. It is in.

The present invention for solving the above problems includes a top plate (12) on which a cooking container is placed, and the top plate (1
2) An induction heating cooker provided with a substantially disc-shaped induction heating coil (13) disposed below 2) and a heating state indicator (20) for displaying a heating state by the induction heating coil (13). (1
The heating state indicator (20) is accommodated along the longitudinal case (21) installed on the side of the induction heating coil (13) and the longitudinal direction of the case (21). Long light guide (40) and one end of the light guide (40) in the longitudinal direction (21) attached to the case (21) (21
a) a light source component (41) opposed to a), and the case (21) includes a groove-shaped light guide housing part (22) surrounding the light guide (40), and the case (21). At least the inner surface of the light guide housing portion (22) is white.

According to the induction heating cooker according to the present invention, at least the inner surface of the light guide housing portion of the case included in the heating state indicator is white, so that the light reflectance by the inner surface of the light guide housing portion is increased. Therefore, it is possible to effectively diffuse the light introduced into the light guide. Therefore,
Conventionally, even if only one light source component that is provided to face both ends of the light guide is provided to face one end of the light guide, the light guide can be sufficiently illuminated. Become. Therefore,
Since the number of light source components can be reduced and there is no need to add other components such as reflectors,
The number of parts of the heating state indicator can be reduced, and the manufacturing cost of the induction cooking device can be reduced. In addition, the manufacturing process of the induction heating cooker can be facilitated.

Moreover, in said induction heating cooking appliance, it is good for the case (21) of a heating condition indicator (20) to be a molded article which consists of a white synthetic resin material. According to this, the white case (21) can be easily manufactured, which leads to simplification of the manufacturing process of the induction heating cooker.
In addition, the code | symbol in said parenthesis has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

According to the induction heating cooker concerning this invention, the number of parts of a heating condition indicator can be restrained small, and reduction of manufacturing cost can be aimed at.

It is a perspective view which shows the whole structure of the induction heating cooking appliance concerning one Embodiment of this invention. It is a perspective view which shows a heating condition indicator. It is a disassembled perspective view which shows the component of a heating condition indicator. It is a perspective view which shows the structural example of the induction heating coil which attached the heating condition indicator.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an external configuration of an induction heating cooker 1 according to an embodiment of the present invention. An induction heating cooker 1 shown in the figure is a cooker that is installed and installed in a system kitchen or the like in a drop-in manner, and includes a main body 11 housed in a substantially rectangular housing, and an upper surface of the main body 11. And a pair of left and right induction heating coils 13 and 13 serving as a heat source installed below the top plate 12 inside the main body 11 and the central back side thereof. And a radiant heater 17. The induction heating coils 13, 13 have a substantially disk-shaped outer shape, and are arranged one by one on the right and left sides of the front side of the top plate 12.

On the other hand, a grill door 18 is provided on the left side (the left side as viewed from the front) of the front surface 11a of the main body 11 so as to be pulled out toward the front side. An operation panel 19 is disposed on the right side of the grill door 18. The operation panel 19 includes a seesaw type power switch 19a.
A lamp 19b, a push-push type operation knob 19c, and the like are disposed. The operation knob 19c can be started by energizing the induction heating coils 13 and 13 and the radiant heater 17 by being pulled out by a push operation, while the operation is stopped by being pushed in. . Further, by rotating the operation knob 19c at the pull-out position, various settings such as heating power, cooking time, cooking temperature and the like by the induction heating coils 13 and 13 and the radiant heater 17 can be performed.

At a position along the outer periphery on the front side of the induction heating coils 13, 13, the induction heating coils 13, 13 are arranged.
Heating state indicators 20 and 20 for displaying the heating state are provided. The heating state indicators 20 and 20 are formed in an arc-shaped strip shape along the outer periphery of the induction heating coils 13 and 13 so that the heating state of the induction heating coils 13 and 13 can be visually confirmed by light emission. is there. In addition, although the top plate 12 is printed with a stone pattern or the like on the surface, transmission windows 12a and 12a that are not printed are provided at locations corresponding to the heating state indicators 20 and 20 on the surface. Is provided. Through the transmission windows 12a and 12a, the light emitted from the heating state indicators 20 and 20 can be viewed from above the top plate 12. The heating state indicators 20 and 20 are integrally attached to the induction heating coils 13 and 13 as will be described later.

FIG. 2 is a perspective view showing the overall configuration of the heating state indicator 20, and FIG. 3 is an exploded perspective view showing the components of the heating state indicator 20. As shown in FIGS. 2 and 3, the heating state indicator 2
0 is a long arc-shaped case 21, a light guide 40 accommodated in the case 21, and a case 2
1 is provided with a light source unit (light source component) 41 attached to one longitudinal end 21a. The case 21 is a molded product made of a white synthetic resin material, and is entirely white. The case 12 has a substantially rectangular cross-sectional shape, has a long arc shape along the outer periphery of the induction heating coil 13, and is formed of a concave portion having a substantially rectangular cross section whose upper surface opens over substantially the entire length thereof. A light body storage unit 22 is provided. A flat plate-like fixing piece 23 is integrally formed on the inner surface of the inner side wall 21c of the arc-shaped case 21 so as to protrude from the upper end of the side wall 21c toward the center of the arc. The fixing piece 23 is formed in a substantially rectangular flat plate shape extending in parallel with the upper surface of the case 21. The fixed piece 23 is integrally formed with a cylindrical shaft-shaped fixed pin 24 protruding downward from the lower surface thereof. The fixing pieces 23 and the fixing pins 24 are provided at a plurality of locations along the longitudinal direction of the side wall 21c. In this embodiment, the fixing pieces 23 and the fixing pins 24 are provided at equal intervals in a total of three locations near both ends and the center of the side wall 21c. ing.

The light guide 40 housed in the light guide housing portion 22 of the case 21 is a molded product made of a transparent or translucent synthetic resin material such as acrylic resin or polycarbonate resin, and has a cylindrical bar shape with a circular cross section. The longitudinal direction is formed in an arc shape along the longitudinal direction of the case 21. The light guide 40 is configured such that when light is incident from the end face in the longitudinal direction, the incident light is diffused inside, so that substantially the entire side surface emits light.

The light source unit 41 includes a flat board portion 42 and an LED attached to one surface of the board portion 42.
And a small circuit component 44 attached to the other surface of the substrate portion 42, and a wiring 45 extending from the circuit component 44. The substrate portion 42 is formed in a substantially rectangular shape whose outer shape is slightly larger than the longitudinal section of the case 21. On the other hand, a light source unit mounting portion 25 for mounting the light source unit 41 is provided at one end 21 a in the longitudinal direction of the case 21.

The light source unit mounting portion 25 includes a mounting plate 26 formed integrally with one end 21 a of the case 21, an engagement piece 28 provided at the upper end of the mounting plate 26, and engagement pieces 27, 27 provided at the lower end. And a snap-in engagement portion 29. The mounting plate 26 has a surface arranged perpendicular to the longitudinal direction of the case 21 and is formed in a substantially rectangular flat plate shape that follows the outer shape of the substrate portion 42 of the light source unit 41. Is formed with an opening 26 a penetrating the light guide housing part 22. The light emitter 43 of the light source unit 41 is arranged in the opening 26a. Further, the engagement piece 28 provided at the upper end of the mounting plate 26 is formed in a substantially U-shaped projection protruding along the upper end side of the mounting plate 26, and the engagement piece provided at the lower end of the mounting plate 26. Piece 27,
27 is formed in a strip shape protruding downward from both sides of the lower end of the mounting plate 26.
Small projecting claw portions 27 a and 27 a for snap-in engagement with the substrate portion 42 of the light source unit 41 are integrally formed on the outer surfaces of the tips of the engagement pieces 27 and 27.

Further, the other end 21 b in the longitudinal direction of the case 21 is provided with a reflecting surface 31 that is a part of the inner surface 22 a of the light guide housing portion 22. The reflecting surface 31 is a flat surface facing the inside of the light guide housing portion 22 in a state orthogonal to the longitudinal direction of the light guide housing portion 22 and is disposed so as to cover the end surface of the light guide housing portion 22.

That is, the light source unit mounting portion 25 is formed at one end 21a in the longitudinal direction of the case 21, and the reflecting surface 31 is formed at the other end 21b. A light guide housing portion 22 is disposed between the light source unit mounting portion 25 and the reflecting surface 31 in the longitudinal direction of the case 21.

In order to assemble the heating state indicator 20 having the above configuration, first, the light source unit 41 is attached to the light source unit attachment portion 25 of the one end 21 a of the case 21. For this purpose, the upper end side of the substrate part 42 is brought into contact with the upper engagement piece 28, and the lower end side of the substrate part 42 is moved to the lower engagement pieces 27, 2 in this state.
7 is snap-in engaged. As a result, as shown in FIG.
It is fixed in a close contact state. Then, the light guide 40 is stored in the light guide storage portion 22 of the case 21. Thus, the assembly of the heating state indicator 20 is completed.

In the heating state indicator 20, one end 40 a of the light guide 40 stored in the light guide storage unit 22.
The light emitting body 43 is opposed to the light guide body 40, and the reflecting surface 31 is opposed to the other end 40 b of the light guide body 40. Therefore, the light incident from the one end 40a of the light guide 40 by the light emission of the light emitter 43 and the light guide 4
Both the light coming out from the other end 40b of 0 and reflected by the reflecting surface 31 are diffused inside the light guide 40, and the entire side surface of the light guide 40 emits light substantially uniformly. The light emitter 43 is
Light emission in at least three colors of green, orange, and red is possible, and it is guided according to the heating temperature (output) of the induction heating coil 13 such as low fire-green, medium fire-orange, and high fire-red. Light body 40
The emission color can be switched.

FIG. 4 is a perspective view showing a configuration example of the induction heating coil 13 to which the heating state indicator 20 is attached. As shown in the figure, the induction heating coil 13 includes a coil body 14 mounted on a coil tray 15. The coil body 14 is formed in a substantially disk shape by winding a linear conductive material concentrically, and the coil tray 15 is formed in a substantially disk shape having a diameter on which the coil body 14 can be placed. . Near the end 15a on the near side of the coil tray 15, a fixing hole 15b made of a through hole is provided. The fixing holes 15b are cylindrical through-holes for inserting and fixing the fixing pins 24 of the heating state indicator 20, and have the number and arrangement corresponding to the fixing pins 24. The heating state indicator 20 is fixed in a state where there is a slight gap between the coil tray 15 and the end side 15a along the end side 15a on the near side. The fixing pin 24 of the case 21 is inserted into the fixing hole 15b from above, and the tip of the fixing pin 24 protruding to the lower surface side of the coil tray 15 is crushed with heat caulking or the like, so that the fixing pin 24 is fixed to the fixing hole 15b. Being
A heating state indicator 20 is attached to the coil tray 15. In the present embodiment, in addition to the three fixing holes 15 b corresponding to the fixing pins 24 of the case 21, one fixing hole 15 b is also provided on each side thereof, so that a total of five are provided. Thereby, the heating state indicator 20
Can be selected from a plurality of locations (three locations in the present embodiment) in the circumferential direction of the coil tray 15.

And in the induction heating cooking appliance 1 of this embodiment, as shown in FIG. 1, the heating condition indicator 20 and 20 is installed in each of the left and right induction heating coils 13 and 13. As shown in FIG. In this case, the shape and arrangement of the left and right heating state indicators 20 and 20 are symmetrical with respect to each other in consideration of the routing of the wirings 45 and 45 connected to the left and right heating state indicators 20 and 20. Therefore, in the left and right heating state indicators 20 and 20, the shape of the case 21 is formed symmetrically, and the light source units 41 attached to the case 21 are attached symmetrically to each other.

And the induction heating cooking appliance 1 of this embodiment made the case 21 with which the heating condition indicator 20 is provided white, and the inner surface of the light guide housing part 22 is a white surface. Therefore, the reflectance of light by the reflecting surface 31 is increased, and the light introduced into the light guide 40 can be effectively diffused. In particular, in the present embodiment, the reflecting surface 3 that is a part of the inner surface of the light guide housing portion 22.
Since 1 is a white surface, the reflectance of light at the other end 40b of the light guide 40 can be increased. Therefore, the light introduced into the light guide 40 can be more effectively diffused without installing a light source unit or a reflecting plate facing the other end 40b of the light guide 40.

Therefore, the light source unit 4 conventionally provided one by one so as to face both ends of the light guide 40.
Even if only one is installed opposite the one end 40a of the light guide 40, the light guide 40 can be sufficiently illuminated. Therefore, the number of installed light source units 41 can be reduced, and there is no need to add other components such as a reflector, so that the number of components of the heating state indicator 20 can be reduced, and the induction heating cooker 1 The manufacturing cost can be reduced.
Moreover, since the assembly of the heating state indicator 20 can be easily performed by reducing the number of parts, the manufacturing process of the induction heating cooker 1 can be facilitated.

In the above-described embodiment, the case 21 is a molded product made of a white synthetic resin material, and the entire case 21 is configured to be white. However, in addition to this, the case 21 itself is made of another color. It may be made of a material, and only the surface may be processed into white. In that case, the surface of the case 21 may be processed so that the surface becomes white by applying a white paint or applying a white seal. In that case, at least the inner surface of the storage portion 22 of the case 21 may be white, and the other portions may be colors other than white.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above-described embodiment, the case where the light emitter 43 having an LED is used as the light source of the heating state indicator 20 is described. However, the light source is not limited to this, and other fluorescent lamps, halogen A light emitter made of a lamp or the like may be used. In addition, the specific shapes and configurations of the case 21, the light guide 40, and the light source unit 41 that constitute the heating state indicator 20 shown in the above embodiment are all examples, and other shapes and configurations are adopted. Is also possible. So, for example,
The light guide 40 may have a shape other than a cylindrical rod shape such as a prismatic shape, or the fixing pin 24 of the case 21.
May be formed in a shape other than a columnar shape such as a prismatic shape.

DESCRIPTION OF SYMBOLS 1 Induction heating cooker 11 Main-body part 12 Top plate 12a Transmission window 13 Induction heating coil 20 Heating state indicator 21 Case 22 Light guide storage part 23 Fixing piece 24 Fixing pin 25 Light source unit attachment part 26 Attachment plate 26a Opening part 29 Snap In engagement part 31 Reflecting surface (white surface)
40 Light guide 41 Light source unit (light source member)
42 Substrate part 43 Light emitter 44 Circuit component 45 Wiring

Claims (2)

Induction provided with a top plate on which the cooking container is placed, a substantially disc-shaped induction heating coil disposed below the top plate, and a heating state indicator for displaying a heating state by the induction heating coil A cooking device,
The heating state indicator is attached to the case, a long case installed on the side of the induction heating coil, a long light guide housed along the longitudinal direction of the case, and the case. And a light source component facing one end in the longitudinal direction of the light guide,
The said case is equipped with the groove-shaped light guide storage part surrounding the said light guide, The inner surface of the said light guide storage part of the said case was made into white, The induction heating cooking appliance characterized by the above-mentioned. The induction heating cooker according to claim 1, wherein the case is a molded product made of a white synthetic resin material.

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