JP2013233361A - Electric rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a product which has fewer recesses and projections on the appearance of an electric rice cooker, is capable of maintaining a stable state even when a lid body is opened, and is safe even when water infiltrates into a rice cooker body.SOLUTION: An electric rice cooker includes: a rice cooker body 1 for freely detachably housing an inner pot 3 capable of storing water and rice; a lid body 2 attached through a hinge unit 11 to one side of an upper opening of the rice cooker body 1 so as to openably and closably cover the upper opening; and a heating means (work coils C1, C2) for heating the inner pot 3. At the bottom part of the rice cooker body 1, a cord reel 15 for pulling out or winding a power cord for power supply to the heating means is horizontally disposed, and is configured in such a way that the center position of the cord reel 15 is positioned on the opposite side of a hinge unit 11 rather than the center position of the rice cooker body 1, recesses and projections are reduced on the appearance of a product, the centroid of the product is positioned to an opposite hinge unit side, designability is improved, and a packing dimension when packing the product is reduced.

Description

  The present invention relates to an electric rice cooker, and more particularly to a cord reel mounting structure in an electric rice cooker.

  In an electric rice cooker having a cord reel, the cord reel is positioned vertically below and on the lower rear side of the hinge shaft for opening and closing the lid in the rice cooker body or in the vicinity of the hinge shaft (for example, a patent Reference 1).

JP 2012-19868 A

  By the way, in the case of the electric rice cooker currently disclosed by the said patent document 1, in order to arrange | position a cord reel in the lower back side of the hinge axis | shaft in a rice cooker main body, or the vicinity, an extra convex part is formed in the rear part of a rice cooker main body. As a result, the appearance of the electric rice cooker was impaired. Moreover, the dimension of the front-back direction will also become large. On the other hand, the formation of the convex part increases the support on the rear side and prevents the electric rice cooker from overturning when the lid is opened, but further impedes design freedom. To do.

  This invention is made in order to solve such a subject, there are few unevenness | corrugations in the external appearance of an electric rice cooker main body, it can maintain the stable state at the time of a lid body opening, and it is in a rice cooker main body. An object of the present invention is to provide a cord reel mounting structure that is safe even when water enters.

  In order to achieve the above object, the present invention is configured with the following problem solving means.

(1) Invention of Claim 1 The electric rice cooker of this invention covers the rice cooker main body which detachably accommodates the inner pot which can store water and rice, and the upper opening of this rice cooker main body so that opening and closing is possible. Thus, an electric rice cooker comprising a lid attached to one side of the upper opening via a hinge unit and a heating means for heating the inner pot, the heating means at the bottom of the rice cooker body The cord reel for supplying power to the hopper is arranged substantially horizontally, and the center of gravity of the cord reel is configured to be located on the opposite side of the hinge unit from the center of gravity of the rice cooker body. Yes.

  If the cord reel is arranged vertically in the vertical direction on the hinge unit side of the rice cooker body as in the past, an extra convex part is formed on the hinge unit side in the rice cooker body, and the appearance of the rice cooker body is impaired. When the cord reel is placed in the horizontal position at the bottom of the rice cooker body, the appearance of the rice cooker body becomes less uneven, the design is improved, the outer dimensions are reduced, and the product is When packing, the packing size can be reduced.

  In addition, since the center of gravity of the cord reel is separated from the center of gravity of the rice cooker body at a position opposite to the hinge unit, the center of gravity of the entire product is on the anti-hinge unit side, and the lid is opened. Even when the lid is covered, the position of the center of gravity of the rice cooker main body is not greatly biased toward the hinge unit, and it is possible to prevent the rice cooker body from falling even when the lid is opened.

(2) Invention of Claim 2 The electric rice cooker of this invention is the electric rice cooker concerning invention of Claim 1, The metal reel part which winds up the said cord reel and a power cord, One surface of this reel part And a cover portion made of a synthetic resin covering the metal, and the metal reel portion is arranged facing downward.

  In this way, since the distance between the reel portion of the cord reel and the heating means that is the heating source can be increased, the influence of heat can be minimized, and the reel portion is wound around the reel portion. The temperature rise of the power cord is suppressed, and a safer product can be provided.

(3) Invention of Claim 3 The electric rice cooker of this invention is the electric rice cooker concerning the invention of Claim 1 or 2, In the electric cooker concerning the invention of Claim 1 or 2, the waterproofing which was started up in the outer peripheral part of the said cord reel in the bottom part of the said rice cooker main body. A rib is formed, and a waterproof cover that covers the upper surface of the cord reel and is fitted on the outer side of the waterproof rib is provided.

  If it does in this way, the outer peripheral part and upper surface of a cord reel will be covered with a waterproof rib and a waterproof cover, the penetration | invasion of the water to a cord reel can be prevented effectively, and the water inside the main body of an electric rice cooker can be prevented. Even if there is an intrusion, it will be safe.

  As a result of the above, according to the present invention, an extra convex portion is formed on the hinge unit side of the rice cooker body as in the conventional case where the cord reel is arranged vertically on the hinge unit side of the rice cooker body. The problems such as the appearance of the rice cooker body being damaged and the outer dimensions being increased are eliminated.

  That is, by arranging the cord reel in the horizontal position at the bottom of the rice cooker body, the appearance is less uneven, the design is improved, and the packaging dimensions can be reduced when packaging the product. .

  Moreover, since the center position of the cord reel is located on the opposite side of the hinge unit from the center position of the rice cooker body, the center of gravity of the entire rice cooker moves to the anti-hinge unit side, and the product falls when the lid is opened. This can also be prevented.

It is a longitudinal cross-sectional view of the electric rice cooker concerning embodiment of this invention. It is sectional drawing which shows the bottom member in the electric rice cooker shown in FIG. It is a disassembled perspective view which shows the structure of the bottom member in the electric rice cooker concerning embodiment of this invention. It is a perspective view which shows the bottom member in the electric rice cooker concerning embodiment of this invention. It is a top view which shows the bottom member in the electric rice cooker concerning embodiment of this invention. It is a top view which shows the usage example of the electric rice cooker concerning embodiment of this invention. It is a top view which shows the usage example of the conventional electric rice cooker.

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

  1 to 6 show an example of an electric rice cooker configuration according to an embodiment of the present invention.

<Composition of rice cooker body and main parts>
A rice cooker body 1 in an electric rice cooker according to an embodiment of the present invention is, for example, an inner pot 3 made of a non-metallic material containing rice and water as shown in FIG. 1 (for example, an earthen pot, a ceramic pot, charcoal). And an inner case made of a lower synthetic resin dish-shaped bottom wall portion 4a and an upper-side cylindrical side wall portion 4b formed so that the inner pot 3 can be arbitrarily set. (Protective frame) 4 and a bottomed cylindrical outer case 5 that is an outer casing for holding the inner case 4, and one side (rear part) of the upper opening edge 1 a of the rice cooker body 1 ) Is attached via a hinge unit 11 to cover the upper opening edge 1a so as to be openable and closable.

  Further, the outer peripheral surface of the bottom wall portion 3a of the inner pot 3 and the outer peripheral surface of the curved surface extending from the bottom wall portion 3a to the side wall portion 3b can be self-heated by an eddy current induced therein. The first and second induction heating elements G1 and G2 made of metal such as silver paste are individually attached.

  A coil base 9 is provided below the bottom wall (bottom) 4 a of the inner case 4, a ferrite core 7 is disposed below the coil base 9, and the lower side of the bottom wall 4 a of the inner case 4 is disposed above. Litz wires are concentrically wound between the coil base 9 and the induction heating elements G1 and G2 on the lower surface side and the side curved surface side of the bottom wall portion 3a of the inner pot 3, respectively. The first and second sets of work coils C1 and C2 are provided to induce eddy currents in the first and second induction heating elements G1 and G2 of the inner pot 3 when energized, The inner pot 3 is indirectly heated. The first and second work coils C1 and C2 are connected to each other in series, for example.

  The bottom wall 4a of the inner case 4 is formed with a sensor part fitting opening for installing a center sensor at the center thereof. Further, a flange-shaped step portion 4c projecting outward in the radial direction of a predetermined width is provided on the upper end side of the outer peripheral edge portion of the bottom wall portion 4a of the inner case 4, and an annular member and a shielding member are provided on the step portion 4c portion. The lower end side of the upper side cylindrical side wall 4b of the inner case 4 is engaged and placed through the heat plate edge.

  On the other hand, the upper end portion of the upper cylindrical side wall 4b is connected and fixed to the shoulder member 8 at the upper end of the rice cooker main body via an inner frame member.

  One end of each of the first and second work coils C1 and C2 is connected to a power supply line through a rectifier circuit and a smoothing circuit (not shown), and the other end is connected to a collector of an IGBT (power transistor) (not shown). ing.

  Further, a metal cylindrical body is provided on the inner peripheral side of the upper cylindrical side wall portion 4b of the inner case 4, and the outer periphery of the cylindrical body functions as a heating means during rice cooking and heat insulation. For example, a heater H1 made of, for example, a cord heater is provided, and the entire side portion of the inner pot 3 is effectively and uniformly heated during cooking and warming.

  Further, the outer case 5 is formed of a cylindrical cover member in the vertical direction formed of, for example, a synthetic resin material, and the upper end portion of the cover member (that is, the outer case 5) is made of the synthetic resin. The annular shoulder member 8 is combined as described above to form the outer peripheral edge of the opening edge 1a of the rice cooker body 1 described above. In addition, a synthetic resin bottom case 10 is coupled to the lower end of the cover member (ie, the outer case 5), and heat insulation and ventilation with a predetermined width are formed between the bottom wall portion 4a of the inner case 4. A space is formed.

  A center sensor fitting opening (center sensor storage space) penetrating concentrically in the vertical direction is formed at the center of the coil base 9 below the inner case 4, and the center sensor storage space A center sensor including an inner pot temperature detection sensor and an inner pot detection switch, each of which is a thermistor, is provided in a state in which it can be moved up and down in a vertical direction and is always upwardly biased by a coil spring.

  Each of the inner case 4, the outer case 5, the shoulder member 8, and the bottom case 10 has a sufficiently reinforced structure in consideration of the characteristics of a pressure-type electric rice cooker that cooks rice in a high-pressure state. .

  On the other hand, the lid body 2 includes an upper plate 21 made of synthetic resin that constitutes an upper outer peripheral surface thereof, a lower plate 22 made of the same synthetic resin provided on the inner side (lower side) of the upper plate 21, A metal heat radiating plate 23 having a lid heater (not shown) that is superposed and fixed to the inner side (lower side) of the main body of the plate 22 via a rubber first packing 25, and below the heat radiating plate 23 It is formed from a metal inner cover 24 provided with a rubber-made second packing 26 via a detachable frame member 27 made of synthetic resin at the outer peripheral edge portion. In order to increase the pressure resistance strength, the outer periphery of the rear end portion of the lower plate 22 main body serving as the center is locked to the hinge unit 11 side. The cover 2 is entirely formed into a high-strength structure by providing a plate thickness, a metal reinforcing plate having a predetermined structure, and a large number of reinforcing ribs on the left and right and front and rear.

  That is, the lower plate 22 has an intermediate portion of the rear end side outer periphery 22a of the main body portion bent upward in the shape of a U, houses the above-described hinge unit 11 on the inner side, and has an outer peripheral end side. The descending portion 22b covers the back of the hinge unit 11.

  The lower plate 22 has a rear end side outer periphery 22a provided with a connecting portion 22c that is located below the U-shaped portion and extends in a crank shape. The connecting portion 22c with the hinge unit 11 is bent in the direction of the main body side shoulder member 8 and faces the stepped portion 8b surface of the rice cooker main body side shoulder member 8.

  And each part 22b, 22c part of these lower-plate 22 rear end side outer periphery 22a is made into a mounting bracket, The said cover body 2 is the shoulder which forms the opening edge part 1a of the rice cooker main body 1 upper part at the rear end side. The member 8 is pivotably attached to the member 8 via a hinge unit 11, and is engaged with a predetermined position of the lid 2 on the open end side (front end side) of the lid 2 in the vertical direction. A lock and unlock mechanism 12 that opens and closes is provided.

  Further, in the substantially central part of the lid body 2, the steam is allowed to escape to the outside while collecting the Neva component, and the pressure in the inner pot 3 is adjusted to two levels of normal pressure and high pressure according to the rice cooking process. A pressure unit 28 is provided.

  The pressure adjusting unit 28 includes a steam escape passage 30 that detours from the inside of the inner pot 3 to the outside and a pressure adjustment mechanism provided in the steam escape passage 30. The pressure adjusting mechanism is located on the inner cover 24 of the steam escape passage 30 and on the downstream side (upper part) of the steam inlet 30a of the heat radiating plate 23, and is provided with a spherical valve B. The pressure regulation pressure is set in the above-described two stages by opening and closing the passage 30.

  On the other hand, in the center of the front part (on the side opposite to the hinge unit) of the upper plate 21 of the lid 2, an operation panel 13 constituting an operation part and a display part of the electric rice cooker is provided (see FIG. 6). The operation panel 13 includes a substrate having a predetermined depth and a liquid crystal panel storage box on the back side of the panel, and an electric substrate (microcomputer substrate) 6B including a microcomputer as a control means of the pressure adjusting mechanism and a liquid crystal panel. Is fitted into the opening of the upper plate 21 and stored. And in the center part, while having a transparent window corresponding to the display surface of a liquid crystal panel, the rice cooking reservation switch SW1, the rice cooking switch SW2, the heat retention switch SW3, and the cancellation switch SW4 for timer rice cooking are provided around the transparent window. Menu selection switch SW5, hour switch SW6, minute switch SW7, rice cake selection switch SW8, heat insulation OFF control mode selection switch SW9 for specifying a rice cooking menu (for example, white rice, quick cooking, rice cake, rice porridge, brown rice and other course menus) Is provided.

  In addition, in the central portion of the operation panel 13, there is a liquid crystal display unit 14 for displaying each menu of rice cooking and warming, a set warming temperature, a set warming time, a current time, a remaining time until cooking is completed, and other necessary items. Is provided.

  In the case of the pressure-type electric rice cooker having the above-described configuration, the weight of the lid 2 is increased as compared with a normal electric rice cooker due to the arrangement of the pressure mechanism and the operation unit (operation panel, operation board, etc.). Become.

  By the way, in the conventional electric rice cooker, the extra convex part for arrange | positioning a cord reel in the back side or the vicinity of the hinge unit in the rice cooker main body 1 was formed (refer FIG. 7). As a result, there is a problem that the appearance of the electric rice cooker is impaired and the packaging dimensions are increased during product packaging.

  Then, in order to solve such a problem, in this Embodiment, as shown, for example in FIGS. 1-5, a heating means is provided in the inner surface side of the bottom case 10 which comprises the bottom part of the said rice cooker main body 1. As shown in FIG. The cord reels 15 for supplying power to the work coils C1 and C2 and the heater H1 and other parts constituting the are arranged horizontally. The cord reel 15 is disposed such that the center of gravity of the cord reel 15 is displaced from the center of gravity of the rice cooker body 1 in the bottom case 10 on the side opposite to the hinge unit 11 (that is, the front side). ing.

  The cord reel 15 includes a metal reel portion 15a provided with a winding spring for winding the power cord 16, and a synthetic resin cover portion 15b covering the opening surface side of the reel portion 15a. In particular, the reel portion 15a is arranged facing downward.

  That is, in the vicinity of the center portion on the inner surface of the bottom case 10, the hinge unit 11 side (that is, the rear side of the rice cooker body 1) and the opposite side of the hinge unit 11 (that is, the front side of the rice cooker body 1). The cord is located at a position that is a predetermined dimension ahead of the middle portion in the front-rear direction of the bottom case 10 and closer to the right side than the middle portion in the left-right direction with respect to the direction connecting the rice cooker body 1 (ie, the front-rear direction of the rice cooker body 1) A substantially annular waterproof rib 17 is integrally formed on the outer periphery of the reel 15 so as to rise upward by a predetermined dimension. The waterproof rib 17 has a part where a rib is not formed so as not to obstruct when the power cord 16 is pulled out or pulled into the cord reel 15.

  A cord passage 18 serving as a passage (opening) when the power cord 16 is pulled out or drawn from the cord reel 15 is provided on one side (that is, the rear side) of the waterproof rib 17. It is formed so as to extend to the rear side of the main body 1.

  If comprised in this way, like the conventional electric rice cooker, the cord reel is arranged in the vertical direction on the hinge unit side of the rice cooker body, whereby the drawing direction of the power cord from the cord reel is shown by a solid line in FIG. However, as shown in the present embodiment, the cord reel 15 is arranged in a horizontal position at the bottom of the rice cooker body 1 and the power cord 16 is limited. Is configured to be pulled out toward the rear side of the rice cooker body 1, for example, as shown in FIG. 6, the direction in which the power cord 16 is pulled out from the cord reel 15 is also indicated by a dotted line in the direction indicated by the solid line. The direction of the power cord 16 can be arbitrarily set, and there is an advantage that the degree of freedom in the direction in which the power cord 16 is pulled out is increased.

  At the center of the waterproof rib 17, a circular concave groove 32 for accommodating the take-up shaft of the reel portion 15 a and the power supply terminal in the cord reel 15 is formed, and at the appropriate position on the bottom of the concave groove 32. Has a small notch 32a for draining water. If it does in this way, even if water should invade into the waterproof rib 17, it can be discharged | emitted quickly and water will not accumulate in the waterproof rib 17, and it will become a safe product.

  Further, a waterproof cover 19 that covers the upper surface of the cord reel 15 and is fitted on the outer side of the waterproof rib 17 is provided on the upper surface side of the cord reel 15, and the waterproof cover 19 is provided on the upper surface of the waterproof cover 19. A guide wall 19a that guides the water that has dropped onto the side where the waterproof ribs 17 are not formed so as not to leak down is integrally formed.

  In FIG. 3, reference numeral 18 a is an opening formed at the inlet portion of the cord passage 18, and 19 b is a cover portion integrally projecting on one side of the waterproof cover 19. The cord passage 18 is attached when the waterproof cover 19 is attached. The inlet opening 18a is closed. Reference numeral 20 denotes a screw cylinder provided at an appropriate position of the waterproof rib 17 and the cover portion 19b. The screw cylinders 20 and 20 include mounting ribs 15b1 provided on the outer periphery of the cord reel 15 (cover portion 15b). The mounting rib 19c provided on the outer periphery of the waterproof cover 19 and the mounting rib 19b1 provided on the cover portion 19b are attached using screws 31, 31.

  By configuring as described above, when the cord reel is arranged in the vertical direction on the hinge unit side of the rice cooker body as in the past, an extra convex part is formed on the hinge unit side in the rice cooker body, and the rice cooker body However, when the cord reel 15 is arranged in the horizontal position at the bottom of the rice cooker body 1 as in the present embodiment, the appearance becomes less uneven, the design is improved, and the product The packaging dimensions can also be reduced when packing.

  In addition, since the center position of the cord reel 15 is located on the opposite side of the hinge unit 11 from the center position of the rice cooker body 1, the center of gravity of the entire product is on the anti-hinge unit side, and the lid 2 is Even when the lid is opened, the position of the center of gravity of the product is not biased toward the hinge unit 11, and the product can be prevented from falling over when the lid 2 is opened. The cord reel 15 includes a metal reel portion 15a around which the power cord 16 is wound, and a synthetic resin cover portion 15b that covers one surface of the reel portion 15a. The distance between the reel portion 15a of the cord reel 15 and the heating means (work coils C1, C2) as the heating source can be increased, and the reel portion 15a is provided with the work coils C1, C2. The influence of heat can be minimized.

  As a result, the temperature rise of the power cord 16 wound around the reel portion 15a is suppressed, and a safe product can be provided. Further, by providing a waterproof cover 19 that covers the upper surface of the cord reel 15 and is fitted on the outer side of the waterproof rib 17, the outer peripheral portion and the upper surface of the cord reel 15 are covered with the waterproof rib 17 and the waterproof cover 19. As a result, water can be effectively prevented from entering the cord reel 15.

  As a result, even when water enters the inside of the electric rice cooker body, it is safe.

  Furthermore, the guide wall 19a is formed integrally on the upper surface of the waterproof cover 19 so as to guide the water dropped on the waterproof cover 19 from leaking to the side where the waterproof rib 17 is not formed. It is possible to almost completely prevent water from entering the portion where the reel 15 is disposed (that is, inside the prevention rib 17), and even safer when water enters the electric rice cooker. It becomes.

<Modification>
In addition, the electric rice cooker of this invention is not limited to the thing of the structure demonstrated in the above embodiment, Of course, it can change suitably in the range which does not deviate from the summary of the invention.

  For example, in the above description and drawings, the inner pot 3 is made of a non-metallic material such as an earthen pot, but it goes without saying that it may be made of a metal such as stainless steel or aluminum. Yes.

1 is a rice cooker body 2 is a lid 3 is an inner pot 10 is a bottom case 11 is a hinge unit 15 is a cord reel 15a is a reel portion 15b is a cover portion 16 is a power cord 17 is a waterproof rib 19 is a waterproof cover C1 and C2 are heated Means (work coil)

Claims (3)

  A rice cooker body for detachably storing an inner pot capable of storing water and rice, and a hinge unit attached to one side of the upper opening to cover the upper opening of the rice cooker body so as to be openable and closable An electric rice cooker provided with a lid and a heating means for heating the inner pot, and at the bottom of the rice cooker body, a cord reel for supplying power to the heating means is disposed substantially horizontally, An electric rice cooker configured such that the center of gravity of the cord reel is located on the opposite side of the hinge unit from the center of gravity of the rice cooker body.   The cord reel is composed of a metal reel portion around which the power cord is wound and a synthetic resin cover portion that covers one surface of the reel portion, and the metal reel portion is disposed facing downward. The electric rice cooker of Claim 1 characterized by these.   At the bottom of the rice cooker body, a waterproof rib raised at the outer periphery of the cord reel is formed, and a waterproof cover that covers the top surface of the cord reel and is fitted on the outside of the waterproof rib is provided. The electric rice cooker as described in any one of Claim 1 and 2 characterized by the above-mentioned.

Images