JP4182964B2 - Electric rice cooker - Google Patents

Description

  The present invention relates to an electric rice cooker provided with liquid crystal display means.

  Recent microcomputer-controlled electric rice cookers are equipped with liquid crystal display means, various rice menus such as white rice, brown rice, rice porridge, rice cake etc., current time, timer rice reservation time, rice cooking completion time, cooking completion time, normal heat retention Various information about cooking, warming, etc., such as warming menu such as low temperature warming, warming time (set time / elapsed time), its operating status (standby, setting, after setting, cooking or warming operation, etc.) It is displayed appropriately according to the

  In the conventional liquid crystal display means, generally, the character portion is fixedly set on the preliminarily display surface, and a predetermined marker portion is moved (lighted) to display correspondingly, while the time and time are displayed. For example, a segment display method using a seven-segment liquid crystal has been adopted for displaying numbers such as (see Patent Document 1).

  On the other hand, recently, in addition to the segment display type liquid crystal display means as described above, a dot matrix display type liquid crystal display means capable of displaying characters and pictures has been provided. A display that can be displayed has been proposed (for example, see Patent Document 2).

  In this way, combining dot segment display type liquid crystal display means in addition to segment display type liquid crystal display means, the current time, timer reserved time, heat retention elapsed time, various operating states, etc. Information content can be provided to users in an easy-to-understand manner.

JP 2002-202499 A (specification, page 1-10, FIG. 1-9) Japanese Patent Laying-Open No. 2004-222936 (Specification, page 1-8, FIG. 1-22)

  However, in the case of the latter conventional example, each of the segment display type liquid crystal display means and the dot matrix display type liquid crystal display means and the substrate on which the respective drive control circuits are provided are provided separately. Each has an independent dedicated microcomputer and control board, and is individually controlled for display.

  Therefore, the number of parts is large, the installation space is wide, the control is complicated, and the product cost is high.

  The present invention has been made based on such circumstances, and instead of a normal segment display type liquid crystal display means, or a segment display type liquid crystal display means and a dot matrix display type liquid crystal display means selectively. An object of the present invention is to provide an electric rice cooker that can be provided.

  The inventions of claims 1 to 4 of the present application have been made for the purpose of solving the above-described problems, and are configured to include the following problem solving means.

(1) Invention of Claim 1 In this invention, it comprises the microcomputer board | substrate provided with the microcomputer for rice cooking or heat insulation heating control, and the liquid crystal display means installed through this liquid crystal holder with respect to this microcomputer board | substrate. in the electric rice cooker, on the back side of the liquid crystal holder, the display control board having a microcomputer for separately driving controls the liquid crystal display device of the dot matrix display system and the microcomputer substrate provided, the liquid crystal holder by said display control board In this manner, the liquid crystal display means of the dot matrix display system can be mounted and driven.

According to such a configuration, the liquid crystal display means is installed via the liquid crystal holder on the microcomputer board provided with the microcomputer for cooking rice or maintaining heat and heating, while the empty space on the back surface of the liquid crystal holder is separated from the microcomputer board. it can be installed display control board having a microcomputer for controlling the driving of the liquid crystal display unit of Dots matrix display system utilized.

That is, by installing the liquid crystal display device of the dot matrix display mode on the liquid crystal holder over, can be easily dot matrix display of various information.

(2) Invention of Claim 2 In this invention, the microcomputer board provided with the microcomputer for rice cooking which can drive-control the liquid crystal display means of a segment display system, or a heat retention heating control, and a liquid crystal holder with respect to this microcomputer board A display control board comprising a microcomputer for driving and controlling the liquid crystal display means of the dot matrix display system on the back side of the liquid crystal holder. the provided, through the liquid crystal holder, it is characterized in that so as to arbitrarily mounted drive the liquid crystal display hand stage of the dot matrix display mode in place of the liquid crystal display unit of the segment display type.

According to such a configuration, a microcomputer board provided with a rice cooking or heat retaining heating control microcomputer capable of driving and controlling the segment display type liquid crystal display means, and the microcomputer board is installed via the liquid crystal holder. In addition to the segment display type liquid crystal display means, a display control board having a microcomputer for driving and controlling the dot matrix display type liquid crystal display means is provided on the back side of the liquid crystal holder. Instead of the segment display type liquid crystal display means, a dot matrix display type liquid crystal display means can be arbitrarily mounted and driven.

Therefore, the liquid crystal holder for installing the liquid crystal can be shared by the segment display type liquid crystal display means and the dot matrix display type liquid crystal display means, and the two types of liquid crystal display means can be easily mounted.

(3) The invention described in claim 3 In the present invention, the dot matrix display type liquid crystal display means or the segment display type liquid crystal display means individually configured, and input / output display control of each of these liquid crystal display means are performed. A microcomputer substrate having a microcomputer, and the microcomputer substrate can be used in common for each of the liquid crystal display means, and either the liquid crystal display means of the dot matrix display method or the liquid crystal display means of the segment display method The liquid crystal display means can be configured by arbitrarily selecting the above.

In this way, the microcomputer substrate (base substrate) having the microcomputer for performing the input / output display control which is fundamental to each of the dot matrix display type liquid crystal display means or the segment display type liquid crystal display means, which are individually configured, is shared. When any one of the individual dot matrix display type liquid crystal display means or the segment display type liquid crystal display means is arbitrarily selected and the liquid crystal display means of the electric rice cooker can be configured, the microcomputer substrate itself The versatility increases, the number of parts decreases, and the product cost also decreases. Also, the installation pace can be small.

(4) Invention of Claim 4 In this invention, the microcomputer board which drives and controls the liquid crystal display means in relation to rice cooking or heat insulation heating control is used for the liquid crystal display means of the segment display system and the liquid crystal display means of the dot matrix display system. In an electric rice cooker that is commonly used for each, a dot matrix display type liquid crystal display means is connected to the microcomputer board by using a segment display type liquid crystal display means connection connector provided on the microcomputer board. It is characterized by doing so.

  According to such a configuration, it is not necessary to increase the number of connectors for connecting the liquid crystal display means on the microcomputer board side more than necessary, and the processing and connection of the board can be facilitated.

  As a result, according to the present invention, the liquid crystal display of the dot matrix display system can be realized with a low-cost and compact device structure. In addition, it is possible to share the base board (basic microcomputer control board) when configuring different models by selectively adopting dot matrix liquid crystal and conventional liquid crystal, reducing the number of parts and reducing the number of parts. It becomes cost.

  FIGS. 1-16 has each shown the structure and effect | action of the main body and the principal part of the electric rice cooker which concern on the best embodiment of this invention.

(Configuration of the rice cooker body)
The rice cooker body of the electric rice cooker is, for example, as shown in FIG. 1, an inner pot (rice cooker or heat insulation container) made of a magnetic metal plate such as a stainless steel plate capable of self-heating by an eddy current induced therein. 3, a synthetic resin bottomed cylindrical inner case (protective frame) 4 formed so that the inner pot 3 can be arbitrarily set, and a bottomed cylinder which is an outer casing for holding the inner case 4 The outer case 1 and a lid unit 2 that can be opened and closed at the top of a rice cooker body formed by integrating the outer case 1 and the inner case 4 are formed.

A coil base 7 is provided on the lower side of the bottom wall portion 4a of the inner case 4, and the upper portion thereof is provided with a ferrite core 7a via a central portion and a lateral portion of the bottom wall portion 3a of the inner pot 3. Two sets of bottom work coils C ₁ and C ₂ each having a litz wire wound concentrically corresponding to the position, and a side work coil C ₃ corresponding to the side wall 3b of the inner pot 3 3 is provided so as to wrap substantially the entire portion from the center portion of the bottom wall portion 3a to the side wall portion 3b, thereby inducing an eddy current in substantially the entire inner pot 3 when energized, thereby making the entire portion substantially uniform. To heat up.

Further, the side wall portion 4b of the inner case 4 is kept heater H ₁ is provided which serves as a heating means at the time of incubation, so as effectively and uniformly heat the whole of the inner bowl 3 at the time of insulation ing.

Further, on the front side of the inner case 4, the IGBT, the heater driving circuit, and the diode for power supply voltage rectification for driving and controlling the work coils C ₁ , C ₂ , C ₃ , the heat retaining heater H ₁ , the shoulder heater H _2, etc. A control circuit board 91 including a bridge, a smoothing circuit, and the like is provided so as to extend in the vertical direction via the board support bracket 9.

  Under the control circuit board 91, for example, a heat sink 19 for radiating heat is provided in contact with the IGBT, and a cooling fan 17 is provided under the lower side. The cooling fan 17 causes the air sucked from the air suction grille 49 formed at the bottom of the outer case 1 to flow to the outer periphery of the inner case 4 through the heat sink 19 and the control circuit board 91 to cool the necessary heat generating part. I do.

  The outer case 1 is integrally formed with a cylindrical metal cover member 1a in the vertical direction, a shoulder member 11 made of a synthetic resin coupled to the upper end portion of the cover member 1a, and a lower end portion of the cover member 1a. The bottom member 1b made of a synthetic resin, and a tubular body with a bottom as a whole in which a heat insulation and ventilation space portion having a predetermined width is formed between the bottom wall portion 4a of the inner case 4 It is configured. An operation panel portion 20 having a substantially half moon shape as shown in FIG. 5 is provided above the front portion of the outer case 1, for example.

  A liquid crystal display unit 21 having a sufficiently large and large display area is provided inside the operation panel unit 20, and around the operation surface 22a of the rice cooking switch 26a, the operation surface 22b of the timer reservation switch 26b, and the cancel switch 26c. Operation surface 22c, heat retention switch 26d operation surface 22d, course selection switch 26e operation surface 22e, menu selection switch 26f operation surface 22f, cooking switch 26g operation surface 22g, hour switch 26h operation surface 22h, minute switch Various operation switch operation surfaces (touch surfaces) such as an operation surface 22i of 26i are provided.

  A microcomputer board 51 is provided at a predetermined angle in the front-rear direction via the board mounting bracket 5 below the inner side of the operation panel 20 (lower side on the back side).

  For example, as shown in detail in FIGS. 2 and 3, the microcomputer board mounting bracket 5 is supported by fixing the lower part 5 a side thereof to the lower part of the front side frame member 11 a extending downward from the main body side shoulder member 11. The microcomputer board 51 is attached to the front surface on the upper part 5b side inclined to the rear side.

  On the microcomputer board (master board) 51, for example, as shown in FIGS. 15 and 16, a microcomputer control unit (heating control function such as rice cooking / cooking / bread / heat insulation and the like, as shown in FIG. A master microcomputer 32 having a display control function of the panel 53B, an EEPROM 45, and a backup power source 48 are provided. As shown in FIGS. 2 to 8, for example, a liquid crystal holder 55 made of a synthetic resin is used as a liquid crystal panel mounting member. It is to be installed.

  The liquid crystal holder 55 has a grooved liquid crystal panel fitting portion 55a on the upper surface side, a display control board mounting portion 55b on the lower surface side, and elastic support pieces 23a to 23i on the outer peripheral portion. The operating rods 24a to 24i of the input switches 26a to 26i are provided, and in addition, LED covers 28a, 28b, 28d and mounting legs 25, 25,.

  The liquid crystal holder 55 includes a liquid crystal panel 53A (see FIGS. 2 and 11) of a dot matrix system or a liquid crystal panel 53B of a segment display system (see FIGS. 3 and 12). Any one of these is arbitrarily selected and installed. The display control board 52 corresponding to the dot matrix display type liquid crystal panel 53A is attached to the lower surface side display control board attachment portion 55b.

  The liquid crystal holder 55 is engaged by inserting the mounting legs 25, 25... Into the mounting holes on the microcomputer board 51 side in a state in which any of the liquid crystal panels 53A or 53B is fitted. By doing so, the microcomputer board 51 is attached with a predetermined interval (see FIGS. 2 and 3). Reference numeral 56 denotes a liquid crystal cover.

  By the way, each of the dot matrix display type liquid crystal panel 53A and the segment display type liquid crystal panel 53B is electrically connected to the microcomputer substrate 51 as follows.

(1) Installation of a dot matrix display type liquid crystal panel 53A (see FIG. 9)
For example, as shown in FIG. 11, the dot matrix display type liquid crystal panel 53 </ b> A includes two harnesses, a connection harness 61 for connection to the display control board 52 and a connection harness 62 for connection to the microcomputer board 51. For example, as shown in FIG. 9, the microcomputer board 51 is connected via the display control board 52 as shown in FIG. Reference numeral 63 in FIG. 9 is a harness for connecting the display control board 52 to the microcomputer board 51.

(2) Installation of segment display type liquid crystal panel 53B (see FIG. 10)
For example, as shown in FIG. 12, the segment display type liquid crystal panel 53B is provided with a pin 60 for connection with the microcomputer board 51. For example, as shown in FIG. 10, the display control board 52 is not used. 16 is directly connected to the microcomputer board 51 as shown in FIG.

  In each of these cases, the connection connector 70 on the microcomputer board 51 side is used for connecting the connection part 71 with the harness 63 of the display control board 52 and the segment display type liquid crystal panel 53B as shown in FIG. 14, for example. The connection part 72 with the pin 60 is provided, and is connected in common through the connector 70.

  The microcomputer control unit 32 shown in FIGS. 15 and 16 on the microcomputer board 50 is provided with desired recognition means for determining the contents of the user's instructions input via the input switches 26a to 26i. A desired rice cooking / cooking or heat retaining function, a desired rice cooking / cooking or heat retaining menu, and a predetermined heating pattern corresponding to the rice cooking / cooking or heat retaining menu are set according to the user instruction recognized by the recognition means. The rice cooking heating control means or the heat retaining heating control means is appropriately operated to perform desired rice cooking / cooking or heat retaining.

  Therefore, the user can use the above input switches 26a to 26i to cook rice / cooking or keep warm, timer reservation, reservation time setting, white rice or brown rice, early cooking, rice porridge, sushi, rice cooking, normal mode or energy saving. If the selection setting contents of various other rice cooking / cooking or heat insulation functions are input, the corresponding function contents are automatically sent to the rice cooking / cooking and heat insulation heating pattern setting section via the recognition means in the microcomputer control unit 32. Therefore, the corresponding rice cooking / cooking or heat insulation heating control is appropriately performed with a desired control pattern (normal / energy saving).

  On the other hand, reference numeral 2 denotes a lid unit. The lid unit 2 includes an outer cover 12 made of synthetic resin that constitutes an outer peripheral surface thereof, an inner cover 13 having a vacuum double wall structure that constitutes an inner peripheral surface thereof, It is comprised from the metal heat sink 16 provided in the lower side of the cover 13 so that attachment or detachment was possible. In addition, the code | symbol 14 is the rubber packing for sealing provided inside the outer peripheral edge part of the said heat sink 16 so that it may correspond to the opening edge part 3c of the inner pot 3, 2a is the steam cap of a steam discharge port. .

  The lid unit 2 is attached to the shoulder member 11 at the rear portion of the outer case 1 so as to be pivotable in the vertical direction via a hinge mechanism, and on the open end side, a predetermined position of the lid unit 2 is provided. A lock / unlock mechanism 18 is provided that engages with and opens and closes the lid unit 2 in the vertical direction.

  As described above, in the preferred embodiment of the present invention, the microcomputer substrate 51 provided with the microcomputer for cooking rice or keeping warming heating, and the liquid crystal display means installed on the microcomputer substrate 51 via the liquid crystal holder 55 Is provided on the back side of the liquid crystal holder 55 with a display control board 52 provided with a microcomputer for driving and controlling the liquid crystal display means 53A of the dot matrix display system. The dot matrix display type liquid crystal display means 53A can be mounted and driven.

  According to such a configuration, it is possible to install the display control board 52 including a microcomputer for driving and controlling the dot matrix display type liquid crystal display means 53A effectively using the empty space on the back surface of the liquid crystal holder 55. .

  Accordingly, if the dot matrix display type liquid crystal display means 53A is provided on the surface of the liquid crystal holder 55, it is possible to easily display a dot matrix of various information.

  Further, in this configuration, a microcomputer board 51 having a microcomputer 32 for rice cooking or thermal insulation heating control capable of driving and controlling the segment display type liquid crystal display means 53B, and a liquid crystal holder 55 for the microcomputer board 51. In the electric rice cooker comprising the segment display type liquid crystal display means 53B installed on the back side, the display control is provided with a microcomputer for driving and controlling the liquid crystal display means 5A of the dot matrix display type on the back side of the liquid crystal holder 55. A substrate 52 is provided so that any one of the segment display type liquid crystal display means 53B and the dot matrix display type liquid crystal display means 53A can be mounted and driven through the liquid crystal holder 55.

  According to such a configuration, the liquid crystal holder 55 for installing the liquid crystal display means can be shared by the segment display type liquid crystal display means 53B and the dot matrix display type liquid crystal display means 53A. Can be easily installed.

  Of course, in that case, the microcomputer substrate 51 that drives and controls the liquid crystal display means in connection with the rice cooking or heat insulation heating control is provided for each of the segment display type liquid crystal display means 53B and the dot matrix display type liquid crystal display means 53A. Commonly used.

  As described above, the microcomputer substrate (base substrate) 51 including the microcomputer control unit 32 that performs input / output display control which is the basis of each of the dot matrix display type liquid crystal display means 53A and the segment display type liquid crystal display means 53B is shared. Then, the versatility of the microcomputer board itself increases, and the product cost also decreases. Also, the installation space can be small.

  Further, in such a case, in this configuration, the dot matrix display type liquid crystal display means 53A is connected to the microcomputer by using the connection connector 70 of the segment display type liquid crystal display means 53B provided on the microcomputer substrate 51. A connection to the substrate 51 is made.

  According to such a configuration, it is not necessary to increase the number of liquid crystal display means connection connectors 70 on the microcomputer substrate 51 side more than necessary, and the processing and connection of the substrate is facilitated.

  As a result, according to the configuration, the liquid crystal display of the dot matrix display system can be realized with a low-cost and compact device structure. In addition, it is possible to share the base board (basic microcomputer control board) in the case of configuring different models by selectively adopting dot matrix liquid crystal and conventional liquid crystal, reducing the number of parts and reducing the number of parts. It becomes cost.

(Other embodiments)
In the electric rice cooker as described above, the model (capacity) is generally switched by a jumper switch provided on the microcomputer board 51.

  By the way, at the time of development, it is necessary to facilitate switching of the size (capacity), and it is convenient to arrange a jumper socket and a jumper switch side by side. On the other hand, the liquid crystal holder 55 may be different in mass production. The jumper switch is unnecessary because it cannot be shared.

  Therefore, it is conceivable to devise a pattern in order to satisfy these two conditions, and to connect a jumper socket (2.5 mm) and a jumper switch (2.5 mm) in series to obtain a common pitch.

  By doing so, the jumper socket cost is reduced. During development, it can be reused on a common board.

It is sectional drawing which shows the structure of the whole rice cooker main body of the electric rice cooker which concerns on best embodiment of this invention. It is an expanded sectional view of the operation panel part centering on the liquid crystal display part of the dot matrix display system of the electric rice cooker. It is an expanded sectional view of the operation panel part centering on the liquid crystal display part of the segment display system of the electric rice cooker. It is a front view which shows the structure of the display state in the standard display pattern of the liquid crystal panel of the dot matrix display system of the same electric rice cooker. It is a front view which shows the structure in the skeleton state at the time of the liquid crystal panel installation of the dot matrix display system of the liquid crystal holder of the operation panel part of the electric rice cooker. It is a front view which shows the structure in the skeleton state at the time of the liquid crystal panel installation of the segment display system of the liquid crystal holder of the operation panel part of the electric rice cooker. It is a perspective view which shows the structure in the liquid crystal panel non-mounting state of the liquid crystal holder of the electric rice cooker. It is a perspective view which shows the structure in the state which mounted the liquid crystal panel of the dot matrix display system of the liquid crystal holder of the electric rice cooker. It is a disassembled side view which shows the structure at the time of mounting the liquid crystal panel of the dot matrix display system of the electric rice cooker. It is a disassembled side view which shows the structure at the time of mounting the liquid crystal panel of the segment display system of the electric rice cooker. It is a perspective view which shows the structure of the liquid crystal panel of the dot matrix display system of the same electric rice cooker. It is a perspective view which shows the structure of the liquid crystal panel of the segment display system of the same electric rice cooker. It is a perspective view which shows the structure of the display control board corresponding to the liquid crystal panel of the dot matrix display system of the electric rice cooker. It is a perspective view which shows the structure of the microcomputer board | substrate of the electric rice cooker. It is a figure which shows the control circuit structure at the time of mounting the liquid crystal panel of the dot matrix display system of the electric rice cooker. It is a figure which shows the control circuit structure at the time of mounting the liquid crystal panel of the segment display system of the electric rice cooker.

Explanation of symbols

C ₁ , C ₂ , C ₃ are work coils, H ₁ is a warming heater, H ₂ is a shoulder heater, 1 is an outer case, 2 is a lid unit, 3 is an inner pan, 20 is an operation panel, 21 is a liquid crystal display, Reference numeral 51 denotes a microcomputer board, 52 denotes a display control board, 53A denotes a dot matrix display type liquid crystal panel, 53B denotes a segment display type liquid crystal panel, and 55 denotes a liquid crystal holder.

Claims (4)

In an electric rice cooker comprising a microcomputer board equipped with a microcomputer for rice cooking or thermal insulation heating control, and a liquid crystal display means installed on the microcomputer board via a liquid crystal holder, on the back side of the liquid crystal holder, In addition to the microcomputer board, a display control board having a microcomputer for driving and controlling the liquid crystal display means of the dot matrix display type is provided, and the liquid crystal display means of the dot matrix display type is mounted and driven by the display control board via the liquid crystal holder. An electric rice cooker characterized by being able to do so. Microcomputer board provided with a rice cooking or heat retaining heating control microcomputer capable of driving and controlling a segment display type liquid crystal display means, and a segment display type liquid crystal display means installed on the microcomputer board via a liquid crystal holder An electric rice cooker provided with a display control board having a microcomputer for driving and controlling a liquid crystal display means of a dot matrix display system on the back side of the liquid crystal holder, and the segment display via the liquid crystal holder. electric rice cookers, characterized in that to be able to arbitrarily mounted drive the liquid crystal display hand stage of the dot matrix display mode in place of the liquid crystal display unit of the system. A dot matrix display type liquid crystal display means or a segment display type liquid crystal display means each configured individually, and a microcomputer board having a microcomputer for controlling input / output display of each of the liquid crystal display means. The liquid crystal display means can be used in common for each of the liquid crystal display means, and any one of the dot matrix display type liquid crystal display means and the segment display type liquid crystal display means can be arbitrarily selected. An electric rice cooker characterized in that An electric rice cooker configured to commonly use a microcomputer substrate for driving and controlling liquid crystal display means in connection with rice cooking or thermal insulation heating control for each of the segment display type liquid crystal display means and the dot matrix display type liquid crystal display means. in the segment display mode liquid crystal display unit of the liquid crystal display unit air electrodeposition characterized in that to be connected to the microcomputer board cooking of dot matrix display type by utilizing the connector for connection provided on the microcontroller board vessel.

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