JP6699357B2 - rice cooker - Google Patents

Description

  The present invention relates to rice cooker technology.

  Conventionally, in a rice cooker, an inlet is provided as a member that supplies power to a rice cooker body by connecting a plug of a power cord (see, for example, Patent Document 1). In the rice cooker described in Patent Document 1, the inlet is fixed to the outer case that constitutes the rice cooker body.

JP, 2005-181663, A

  According to the above-mentioned conventional technique, the inlet is attached to the outer case and is electrically connected to the inside of the main body of the rice cooker by the harness. Therefore, when assembling the outer case inside the main body of the rice cooker, it is necessary to perform the assembling work with the inlet fixed to the outer case and the inlet connected to the inside of the main body by the harness. For this reason, the installation work becomes complicated, and the size of the rice cooker main body becomes large because it is necessary to secure a space for housing the harness inside the outer case.

  The present invention provides a rice cooker that can simplify the work of attaching the outer case to the inside of the main body and can make the rice cooker body compact.

  Next, means for solving this problem will be described.

That is, in claim 1, a rice cooker main body including an outer case and an inside of the main body accommodated in the outer case, and a lid body that is capable of opening and closing the rice cooker main body and connected to the rice cooker main body. A rice cooker including an inner pot housed in the rice cooker main body and a power cord for supplying electric power to the inside of the main body, wherein a case opening is formed in the outer case, A connecting member for connecting to the power cord is fixed inside the main body via a holding member, is held inside the main body, and is arranged facing the case opening of the outer case and fixed to the connecting member. The noise filter substrate further includes a noise filter substrate, and the side surface of the noise filter substrate on the case opening side is entirely covered with the holding member .

  Accordingly, when the outer case is assembled inside the main body of the rice cooker, the connecting member is held inside the main body, so that the mounting work can be simplified. Further, the harness for connecting the connection member and the inside of the main body becomes short, and the space for housing the harness can be made small, so that the rice cooker main body can be made compact.

  In the second aspect, the connection member is directly connected to the substrate inside the main body.

  Thereby, the connector and the harness for connecting the connecting member and the substrate can be omitted, so that the rice cooker body can be made more compact.

In claim 3, the front Symbol connecting member is intended to be directly connected to the noise filter substrate.

  Thereby, the connector and the harness for connecting the connecting member and the substrate can be omitted, and thus the electromagnetic noise radiated from the connector and the harness can be reduced.

  The effects of the present invention are as follows.

  INDUSTRIAL APPLICABILITY The rice cooker according to the present invention can simplify the work of attaching the outer case to the inside of the main body and can make the rice cooker main body compact.

Sectional drawing which shows the structure of a rice cooker. The rear perspective view of a rice cooker. The figure which showed the assembly state of the outer case. The figure which showed the assembly state of the noise filter board and the noise filter cover. An enlarged view of a noise filter substrate and a noise filter cover. FIG. 3 is a plan view showing a positional relationship between a control board and a noise filter board.

[Structure of rice cooker 20]
The configuration of the rice cooker 20 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view showing the configuration of the rice cooker 20. In this specification, the direction of the rice cooker 20 is defined by the direction of the arrow shown in FIGS. 1 and 2. In addition, although an IH type rice cooker 20 is described in the present specification, the present invention can also be applied to a heater type rice cooker or the like.

  The rice cooker 20 includes a rice cooker main body 21 having an opening on the upper side, and a lid body 40 connected to the upper part of the rice cooker main body 21 such that the opening can be opened and closed. The rice cooker main body 21 has an outer case 22 which is a steel plate case or a container made of synthetic resin and has an opening at the upper side, and an inside of the main body accommodated in the outer case 22. As shown in FIG. 3, a case opening 22a for inserting the plug 39a of the power cord 39 is formed through the outer case 22 at an intermediate portion in the vertical direction on the left side of the rear surface of the outer case 22. As shown in FIGS. 2 and 3, the case opening 22a is provided with an inlet cover 38 having a cover hole 38a.

  As will be described later, the inside of the main body is composed of an inner case 24, a bottom work coil 27, a side work coil 28, a coil support 29, a bottom shield plate 71, a side shield plate 72, and ferrite (not shown). ..

  Then, an inner pot 23 such as a metal pot or a clay pot is detachably set inside the main body and is housed in the rice cooker main body 21. On the outside of the inner pot 23, an inner case 24 that is a protective frame following the shape of the inner pot 23 is provided. The inner case 24 is formed of a heat-resistant synthetic resin such as polyethylene terephthalate, and has a sensor insertion hole 24a at the center of the bottom thereof for allowing the center sensor 138a formed of a thermistor to face the inside of the inner case 24. Be done.

  The upper end of the inner case 24 is integrally connected to the upper end of the outer case 22. A bottom work coil 27 and a side work coil 28, which are heating coils for inductively heating the inner pot 23, are provided on the outer surface of the bottom of the inner case 24 and the outer surface of the curved portion extending from the bottom to the side. The bottom work coil 27 and the side work coil 28 are provided concentrically around the center of the bottom of the inner case 24 at each position of the bottom and the curved portion of the inner case 24. Specifically, the bottom work coil 27 is disposed below the inner pot 23, and when the bottom work coil 27 is energized, an eddy current is induced at the bottom of the inner pot 23 to perform induction heating. Further, the side work coil 28 is disposed outside the lower curved portion of the inner pot 23, and by applying a high frequency current to the side work coil 28, an eddy current is induced in the side portion of the inner pot 23. Induction heating.

  A coil support base 29, which is a coil holding member made of synthetic resin, is provided below the bottom work coils 27. By attaching the coil support base 29 to the inner case 24 with a screw or the like, the bottom work coil 27 is provided. The side work coil 28 and the side work coil 28 are positioned and held at the predetermined positions shown in the figure.

  Around the bottom work coil 27 and the side work coil 28, a bottom shield plate 71 and a side shield plate 72 made of aluminum are arranged. Specifically, the bottom shield plate 71 is arranged below the bottom work coil 27, and the side shield plate 72 is arranged outside the side work coil 28. The bottom shield plate 71 and the side shield plate 72 are held by the coil support base 29. That is, since the heating coil including the bottom work coil 27 and the side work coil 28 and the shield plate including the bottom shield plate 71 and the side shield plate 72 are integrally held on the coil holder 29. is there. The bottom shield plate 71 and the side shield plate 72 can be made of another metal material.

  Further, in the present embodiment, from the outer peripheral side surface to the bottom surface of the coil support base 29, between the bottom work coil 27 and the bottom shield plate 71 and between the side work coil 28 and the side shield plate 72 are shown. Not Installed ferrite (magnetic material). Thereby, of the magnetic force lines generated when a high-frequency current is passed through the bottom work coil 27 and the side work coil 28, the magnetic force lines generated outside the inner pot 23 are guided to the inside of the ferrite to prevent leakage of the magnetic force lines. At the same time, the inductive coupling with the inner pot 23 is enhanced.

  An output control board 32 and a noise filter board 35 are provided on the rear side inside the outer case 22. The output control board 32 includes an IH circuit including the bottom work coil 27 and the side work coil 28 and an IGBT, an IGBT drive circuit that drives the IGBT of the IH circuit, a heater drive circuit that drives and controls a heat retention heater and a lid heater, and a power supply. Various circuits such as a rectifier circuit including a diode bridge for voltage rectification and a CR circuit, and a microcomputer control unit for controlling these circuits are provided. The output control board 32 is disposed behind the inner pan 23 in a posture in which the thickness direction of the output control board 32 is directed forward and backward. A control board cover 32c is disposed behind the output control board 32.

  In the rice cooker 20, the output control board 32 outputs a signal from the microcomputer control unit to energize the bottom work coil 27 and the side work coil 28 via the IH circuit, so that the eddy current flows in the inner pot 23. Is induced to heat. That is, the output control board 32 controls the heating of the inner pot 23 by the bottom work coil 27 and the side work coil 28, which are heating means.

  The noise filter board 35 includes a noise filter circuit in the power supply circuit section from the power supply cord 39. The noise filter substrate 35 is arranged in parallel with the output control substrate 32 and adjacent to the rear of the output control substrate 32 and the control substrate cover 32c in a posture in which the thickness direction is directed forward and backward. As shown in FIGS. 5 and 6, the noise filter substrate 35 includes an inlet portion 35a in which the inlet 36 is arranged and a coil portion 35b in which the coil 35e is arranged. The base material 35c of the inlet portion 35a is arranged on the front side, and the base material 35d of the coil portion 35b is arranged on the rear side. In other words, the inlet portion 35a and the coil portion 35b are arranged 180 degrees inverted from each other.

  An inlet 36, which is a connecting member for electrically connecting the inside of the main body and the power cord 39, is connected to the noise filter substrate 35 by directly soldering. In other words, the inlet 36 is connected to the noise filter substrate 35 without a connecting member such as a connector or a harness. This can prevent electromagnetic wave noise from being radiated from a connecting member such as a connector or a harness.

  Since some of the above-mentioned electric parts generate heat, a cooling fin 33 for cooling the heat generating elements and the like is provided on the lower front side of the output control board 32. Further, in order to dissipate heat from the output control board 32, the cooling fins 33, and the noise filter board 35, a cooling fan 34 is provided on the left side below each of them. More specifically, as shown in FIG. 6, the cooling area by the cooling fan 34 is divided into a portion F1 for cooling the output control board 32 and the cooling fins 33 and a portion F2 for cooling the noise filter board 35. The cooling efficiency of each is improved.

  In the present embodiment, as shown in FIG. 6, a gap C is provided between the output control substrate 32 and the control substrate cover 32c and the noise filter substrate 35 so that the cooling air from the cooling fan 34 passes through the gap C. Thus, the gap C is configured as a cooling passage. Further, the base material 35c of the inlet portion 35a, the coil 35e of the coil portion 35b, and other components that easily generate heat are disposed on the side of the gap C (on the front side), thereby increasing the cooling efficiency.

  As shown in FIGS. 3 and 5, the inlet 36 is held inside the main body by being fixed to the noise filter cover 37 which is a holding member (see FIG. 5). In this way, by configuring the inlet 36 to be held inside the main body, the amount of extension of the plug 39a of the power cord 39 from the rice cooker main body 21 can be reduced. Moreover, even if a spillage or the like occurs when rice is cooked by the rice cooker 20, it is configured so that the bean does not easily enter the inlet 36. The noise filter cover 37 is arranged so as to entirely cover the rear side of the noise filter substrate 35. Accordingly, the noise filter cover 37 functions as a waterproof/dustproof cover for the noise filter substrate 35 and the inlet 36.

  A cover opening 37a is formed in a portion of the noise filter cover 37 corresponding to the inlet 36. As shown in FIG. 1, the inlet 36 is arranged so as to face the case opening 22 a of the outer case 22. That is, the inlet 36 is inserted into the cover hole 38a of the inlet cover 38, the case opening 22a of the outer case 22, and the cover opening 37a of the noise filter cover 37 by inserting the plug 39a of the power cord 39 into the plug 36a. 39a can be inserted.

  The inlet portion 35 a of the noise filter substrate 35 is supported by the noise filter cover 37 via the inlet 36. In other words, the inlet portion 35a is so-called floating retained by the inlet 36. In this way, by having the configuration in which the inlet portion 35a is held by the inlet 36, the inlet portion 35a can be moved integrally with the inlet 36. That is, even if the inlet 36 moves when the plug 39a is inserted into or removed from the inlet 36, the inlet portion 35a is not fixed to a member other than the inlet 36, so that no stress is generated in the soldered portion of the inlet 36, and the solder is not soldered. It is possible to prevent peeling.

  The lid 40 has an upper lid member 41 and a lower lid member 42 made of resin that form an outer peripheral surface. The under-lid member 42 is a resin member similar to the over-lid member 41, and a hinge shaft 58 and a hinge spring 59 are arranged at the rear portion thereof. A coil-shaped hinge spring 59 is attached to the hinge shaft 58, one end of the hinge spring 59 is locked to the lid 40, and the other end is locked to the cat 26, so that the hinge 40 is always attached to the lid 40. A spring force is applied in the opening direction.

  A vapor discharge tube (not shown) is provided in the center and rearward of the lower lid member 42. Then, the steam in the inner pot 23 is discharged to the outside from the steam discharge tube through the steam passage provided in the upper lid member 41, and from the steam port provided in the upper surface of the upper lid member 41. The temperature of the steam discharged through the steam passage is detected by the steam sensor 138c. Further, on the front side of the upper lid member 41, a lock mechanism (not shown) that allows the lid 40 to be opened and closed by pressing the pressing member 50 is provided.

  Timer reservation for each function of rice cooking/cooking/heat retention of the rice cooker, selection of rice cooking and heat retention menu, heating cooking menu, selection setting operation such as heating amount, heating pattern, heat retention temperature, heat retention time corresponding to each menu Is performed by the user through various input switch groups (operation key groups) provided on the operation panel section 51 of the rice cooker body, and finally the bottom work coil 27 and the side work pieces are selected according to the selected setting contents. The coil 28, the heat retention heater, the lid heater, and the like are appropriately controlled.

  Further, in the central portion of the operation panel section 51, rice cooking, cooking (for example, bread fermentation/baking, etc.), heat retention menus, set heat retention temperature, set heat retention time, heat retention elapsed time, current time, timer rice reservation A liquid crystal display is provided to display the time, the completion of rice cooking, the remaining time until the completion of cooking, and other various necessary items.

  The lid 40 includes a pressure adjusting device that adjusts the air pressure inside the inner pot 23 during rice cooking in the internal space formed when the rice cooker main body 21 is closed by the lid 40. Specifically, a valve cover 60 having a rectangular shape in a plan view, which opens downward and protrudes upward, is provided at a central portion of an upper side of the under-cover member 42, and a valve cover 60 is provided on the front side of the valve cover 60. A solenoid 68, which is a component, is arranged.

  The pressure adjusting device has a solenoid 68, a plunger 69, a spherical valve 99, and the like. When the pressure cooked rice is not selected and the solenoid 68 is inactive (OFF), the plunger 69 is pushed backward and pushes the spherical valve 99. Open the pores 97.

  Then, when the solenoid 68 is selected for pressure cooked rice (ON), the plunger 69 is pulled forward and separated from the spherical valve 99, so that the spherical valve 99 moves to the position right above the ventilation hole 97 by its own weight. Block 97.

  As a result, rice is cooked at a pressure corresponding to the weight of the spherical valve 99, and when the pressure in the inner pot 23 becomes higher than that, excess steam pushes up the spherical valve 99 and is discharged from the vent hole 97. The opening pressure of the spherical valve 99 is set to a predetermined atmospheric pressure, and when the vapor pressure reaches that pressure, it is lifted to open the vent hole 97.

  In the pressure adjusting device configured as described above, when the atmospheric pressure inside the inner pot 23 is adjusted to the atmospheric pressure during rice cooking (when the pressure control is stopped), the operation of the solenoid 68 is stopped and the plunger 69 causes the spherical valve. Press 99 to open vent 97.

  Next, when the pressure adjusting means is operated to adjust the internal pressure of the inner pot 23 to a predetermined atmospheric pressure during rice cooking, the solenoid 68 is operated to move the plunger 69 away from the spherical valve 99 and the spherical valve 99. The vent hole 97 is closed by its own weight.

  As described above, according to the rice cooker 20 according to the present embodiment, the case opening 22a is formed in the outer case 22, and the inlet 36 is held inside the main body and is disposed so as to face the case opening 22a. There is. Thus, in the present embodiment, as shown in FIG. 3, when the outer case 22 is assembled inside the main body of the rice cooker 20, the inlet 36 is held inside the main body, so Is not connected with a harness or the like. That is, since the assembling work can be performed with the outer case 22 completely separated from the inside of the main body, the attaching work of the outer case 22 can be simplified. When actually assembling the outer case 22, the outer case 22 is covered from above the inside of the main body which is turned upside down, but in FIG. 3, for convenience of description, the inside of the main body is on the upper side and the outer case is on the lower side. 22 is described.

  Further, in the present embodiment, since the inlet 36 is directly connected to the noise filter substrate 35, a connector and a harness for connecting the inlet 36 and the noise filter substrate 35 can be omitted, so that the rice cooker can be omitted. The body can be made more compact. Specifically, it is possible to reduce the protrusion amount corresponding to the size of the connector for connecting the inlet 36 and the noise filter substrate 35.

  Even when the inlet 36 is connected to the noise filter substrate 35 via the connector or the harness, the inlet 36 is held inside the main body according to the present embodiment, and it is not necessary to connect the inside of the main body to the outer case 22. Therefore, the harness for connecting the inlet 36 and the inside of the main body can be shortened. That is, since the space for housing the harness can be reduced, the rice cooker body 21 can be made compact.

  In this embodiment, the inlet 36 is connected to the noise filter substrate 35, but the inlet 36 and another substrate housed inside the rice cooker body 21 may be directly connected. Is. For example, the inlet 36 may be connected to the output control board 32 instead of the noise filter board 35, or may be connected to the power supply board in the heater type rice cooker. Even in such a case, the connector and the harness for connecting the inlet 36 and various substrates can be omitted, so that the rice cooker body can be made compact.

20 Rice Cooker 21 Rice Cooker Main Body 23 Inner Pan 35 Noise Filter Substrate 36 Inlet

Claims (3)

A rice cooker body including an outer case and an inside of the body housed in the outer case;
A lid body that is capable of opening and closing the rice cooker body and is connected to the rice cooker body,
An inner pot housed in the rice cooker body,
A rice cooker comprising a power cord for supplying electric power to the inside of the main body,
A case opening is formed in the outer case,
A connection member for connecting to the power cord inside the main body is fixed inside the main body via a holding member, is held inside the main body , and is disposed so as to face a case opening portion of the outer case ,
Further comprising a noise filter substrate fixed to the connecting member,
The noise filter substrate is
Inside the main body, the side surface on the case opening side is entirely covered by the holding member,
A rice cooker characterized by that. The connection member is directly connected to the substrate inside the main body,
The rice cooker according to claim 1, wherein: Before SL connecting member is directly connected to the noise filter substrate,
The rice cooker according to claim 1, wherein:

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