JP5321265B2 - Electric rice cooker lid unit - Google Patents

Electric rice cooker lid unit Download PDF

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JP5321265B2
JP5321265B2 JP2009142083A JP2009142083A JP5321265B2 JP 5321265 B2 JP5321265 B2 JP 5321265B2 JP 2009142083 A JP2009142083 A JP 2009142083A JP 2009142083 A JP2009142083 A JP 2009142083A JP 5321265 B2 JP5321265 B2 JP 5321265B2
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lid
cover
rice cooker
end side
electric rice
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JP2010284401A (en
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尚輝 藤川
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Tiger Corp
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Description

本願発明は、外蓋および内蓋の２つの蓋部材を備えるとともに、外蓋の下面に蒸気シール用のパッキンを設け、該蒸気シール用のパッキンを介して外蓋の下面に内蓋を着脱可能に取り付けるようにした電気炊飯器の蓋ユニットの構成に関するものである。   The present invention comprises two lid members, an outer lid and an inner lid, and a gasket for steam seal is provided on the lower surface of the outer lid, and the inner lid can be attached to and detached from the lower surface of the outer lid through the gasket for steam seal. It is related with the structure of the cover unit of the electric rice cooker made to attach to.

最近の電気炊飯器では、例えば図６、図７に示すように、外蓋２６および内蓋２８の２つの蓋部材を備えるとともに、外蓋２６の下面に蒸気シール用のパッキン２３を設け、該蒸気シール用のパッキン２３を介して外蓋２６の下面に内蓋２８を着脱可能に取り付けるようにした蓋ユニット２を採用したものがある。   In recent electric rice cookers, for example, as shown in FIGS. 6 and 7, two lid members of an outer lid 26 and an inner lid 28 are provided, and a seal 23 for steam seal is provided on the lower surface of the outer lid 26, Some employ a lid unit 2 in which an inner lid 28 is detachably attached to the lower surface of an outer lid 26 via a seal 23 for steam sealing.

この蓋ユニット２は、蓋上部の外周面を形成する外カバー２１および該外カバー２１の外周部内側に位置して係合固定され、その内周側開口部２２ａ内に蒸気シール用のパッキン２３を介して蓋ヒータＨ2を備えた放熱板２４を嵌合一体化した内カバー２２よりなる外蓋２６と、一端側爪部材２８ｄを上記外蓋２６下面側の上記内カバー２２の一端側に設けた内蓋係止部２２ｅに係止する一方、同係止部２２ｅを支点として、その他端側を上記内カバー２２の他端側に回動させ、同内カバー２２の他端側に設けられた所定の係合部（図示省略）に係合することによって、上記蒸気シール用のパッキン２３を挟んで上記外蓋２６の下面に着脱可能に取り付けられる内蓋２８とを備え、図示しない内鍋を収納した電気炊飯器本体に対し、その上部を覆って開閉可能に取り付けられるようになっている（一例として特許文献１を参照）。 The lid unit 2 is engaged with and fixed to an outer cover 21 that forms an outer peripheral surface of the upper portion of the lid, and an inner peripheral portion of the outer cover 21, and a steam seal packing 23 is provided in the inner peripheral opening 22 a. An outer cover 26 comprising an inner cover 22 in which a heat radiating plate 24 provided with a lid heater H 2 is fitted and integrated with each other, and one end side claw member 28 d on one end side of the inner cover 22 on the lower surface side of the outer cover 26. While locking to the provided inner lid locking portion 22e, the other end side is rotated to the other end side of the inner cover 22 using the locking portion 22e as a fulcrum, and provided on the other end side of the inner cover 22 An inner lid 28 that is detachably attached to the lower surface of the outer lid 26 with the steam seal packing 23 interposed therebetween by engaging with a predetermined engagement portion (not shown). The top of the electric rice cooker containing the pot Overlying adapted to be mounted openably (see Patent Document 1 as an example).

特開２００７−３３０７６７号公報JP 2007-330767 A

ところが、以上のように内蓋２８を外蓋２６の内カバー２２部分に取り付けるに際し、例えば図６に示すように、内カバー２２の内蓋係止部２２ｅに対する内蓋２８の挿入角度θが所定の角度よりも大きい場合には、蒸気シール用のパッキン２３を捲ることはないが、同挿入角度θが所定角度よりも小さい場合、そのままでは、内蓋２８挿入時に、放熱板外周の蒸気シール用のパッキン２３のパッキン部分２３ｂを大きく捲ってしまい、同パッキン部分２３ｂがパッキンとして機能しない状態で内蓋２８が内カバー２２に固定されてしまう問題が生じる。その結果、良好な炊飯ができなくなる。   However, when the inner lid 28 is attached to the inner cover 22 portion of the outer lid 26 as described above, for example, as shown in FIG. 6, the insertion angle θ of the inner lid 28 with respect to the inner lid locking portion 22e of the inner cover 22 is predetermined. If the angle is larger than the above angle, the steam seal packing 23 is not covered, but if the insertion angle θ is smaller than a predetermined angle, the inner cover 28 is inserted as it is when the inner lid 28 is inserted. This causes a problem that the inner cover 28 is fixed to the inner cover 22 in a state in which the packing portion 23b of the packing 23 is not functioned as a packing. As a result, good cooking rice cannot be performed.

このような蒸気シール用パッキン２３の捲れ防止策として、例えば放熱板２４の直径を小さくすることにより、蒸気シール用パッキン２３の直径も小さくして外蓋２６の中央側に寄せ、内蓋２８の一端側と当接しないようにすることも考えられるが、そのように放熱板２４の直径を小さくすると、放熱板２４の蓋ヒータＨ2の配設面積および放熱面積が小さくなり、放熱量も低下するので、内蓋２８および内鍋開口部全体への均一な放熱が不可能となる。 As a measure for preventing the steam seal packing 23 from squeezing, for example, by reducing the diameter of the heat radiating plate 24, the diameter of the steam seal packing 23 is also reduced and brought closer to the center side of the outer lid 26. Although it is conceivable not to contact the one end side, if the diameter of the heat radiating plate 24 is reduced in this way, the arrangement area and the heat radiating area of the lid heater H 2 of the heat radiating plate 24 are reduced, and the heat radiation amount is also reduced. Therefore, uniform heat dissipation to the entire inner lid 28 and the inner pot opening is impossible.

その結果、内蓋や内鍋部分に露が発生しやすく、ご飯の白ボケ等の原因となる。   As a result, dew is likely to be generated on the inner lid and the inner pot portion, which causes white blurring of rice.

本願発明は、以上のような問題を解決するためになされたもので、外蓋の下面に蒸気シール用のパッキンを有し、該パッキンを介して外蓋の下面に内蓋を着脱可能に取り付ける場合の外蓋下面側パッキンの捲れを回避し、取付後の蒸気に対するシール性能を確保することができるようにした電気炊飯器の蓋ユニットを提供することを目的とするものである。   The present invention has been made to solve the above problems, and has a seal for steam sealing on the lower surface of the outer lid, and the inner lid is detachably attached to the lower surface of the outer lid via the packing. It is an object of the present invention to provide a lid unit for an electric rice cooker that can prevent the outer lid lower surface side packing from being twisted and ensure the sealing performance against steam after mounting.

本願発明は、上記の目的を達成するために、次のような課題解決手段を有して構成されている。   In order to achieve the above object, the present invention has the following problem solving means.

（１） 請求項１の発明
この発明の電気炊飯器の蓋ユニットは、外周面を形成する外カバーおよび該外カバーの外周部内側に位置して係合固定され、その内周側開口部に蒸気シール用のパッキンを介して放熱板を嵌合一体化した内カバーよりなる外蓋と、一端側を上記外蓋下面側の上記内カバーの一端側に設けた係止部に係止する一方、同係止部を支点として、その他端側を上記内カバーの他端側に回動させ、同内カバーの他端側に設けた所定の係合部に係合することによって、上記蒸気シール用のパッキンを挟んで上記外蓋の下面に着脱可能に取り付けられる内蓋とを備え、内鍋を収納した電気炊飯器本体に対し、その上部を覆って開閉可能に取り付けられる電気炊飯器の蓋ユニットであって、上記内カバー内周側の上記蒸気シール用パッキンと上記支点側係止部との間に、上記内蓋の一端側を上記支点側係止部に挿入係止する時の上記蒸気シール用パッキンの捲れを回避する所定の高さの凸状部を設けたことを特徴としていいる。 (1) Invention of Claim 1 The lid unit of the electric rice cooker according to the present invention is engaged and fixed on the inner side of the outer cover that forms the outer peripheral surface and the outer peripheral portion of the outer cover. An outer lid made of an inner cover with a heat sink fitted and integrated via a seal for steam sealing, and one end side locked to a locking portion provided on one end side of the inner cover on the lower surface side of the outer lid The steam seal is formed by rotating the other end side to the other end side of the inner cover with the locking portion as a fulcrum and engaging with a predetermined engaging portion provided on the other end side of the inner cover. An electric rice cooker lid that is attached to the lower surface of the outer lid so as to be detachable with a packing for use, and is attached to the electric rice cooker main body containing the inner pan so as to be openable and closable. A unit for steam sealing on the inner peripheral side of the inner cover. A convex shape with a predetermined height between the fulcrum side locking portion and the fulcrum side locking portion to prevent the steam seal packing from twisting when the one end side of the inner lid is inserted and locked into the fulcrum side locking portion. It is characterized by having a part.

このような構成によると、内蓋の取付時において、内蓋の一端側を内カバーの一端側内蓋係止部に向けて挿入係止しようとする時に、外蓋下面との間の傾斜角が小さく、内蓋が外蓋下面の蒸気シール用パッキンに接触する状態で挿入操作されたような場合にも、内蓋一端側が凸状部に当たって蒸気シール用パッキンよりも上方側に位置規制されるようになるので、従来のように蒸気シール用パッキンのパッキン片部分を捲るようなことがなくなる。   According to such a configuration, when the inner lid is attached, an inclination angle between the inner lid and the lower surface of the outer lid when one end of the inner lid is to be inserted and locked toward the inner lid locking portion on the one end side of the inner cover. Even when the inner lid is inserted and operated in contact with the steam seal packing on the lower surface of the outer lid, one end of the inner lid hits the convex portion and is positioned above the steam seal packing. As a result, the packing piece portion of the seal for steam sealing is not crushed as in the prior art.

また、放熱板を内鍋の開口に対応した十分に広い面積のものとすることができ、放熱板側の蓋ヒータの配設密度、配設面積を十分に大きく、かつ均一なものとすることができることから、上方から下方への加熱効果が向上し（均一かつ高効率になり）、内蓋や内鍋部分の露付きが生じにくくなる。   In addition, the heat sink can have a sufficiently wide area corresponding to the opening of the inner pan, and the density and area of the cover heater on the heat sink side must be sufficiently large and uniform. Therefore, the heating effect from the upper side to the lower side is improved (becomes uniform and highly efficient), and the inner lid and the inner pot portion are less likely to be exposed.

さらに、上記放熱板の径の拡大に対応して、蒸気シール用パッキンの直径をも十分に大きなものとすることができるので、炊飯時における内蓋との間のおねば収容空間も十分に大きなものとなり、おねばの吹きこぼれが生じにくくなる。   Furthermore, since the diameter of the steam seal packing can be made sufficiently large in response to the expansion of the diameter of the heat radiating plate, the accommodation space between the inner lid at the time of rice cooking is also sufficiently large. It becomes a thing, and it becomes difficult to produce a spill of rice crackers.

これらの結果、炊飯時のご飯の炊き上り、保温時のご飯の保温状態が良好となる。   As a result, the cooked rice at the time of cooking rice and the heat insulation state of the rice at the time of heat insulation become good.

（２） 請求項２の発明
この発明の電気炊飯器の蓋ユニットは、上記請求項１の発明の構成において、凸状部が、筒状壁構造のリブであることを特徴としている。 (2) Invention of Claim 2 The cover unit of the electric rice cooker of this invention is the structure of the said invention of Claim 1, The convex part is characterized by being a rib of a cylindrical wall structure.

このような構成によると、内蓋の取付時において、内蓋の一端側を内カバーの一端側内蓋係止部に向けて挿入係止しようとする時に、外蓋下面との間の傾斜角が小さく、内蓋が外蓋下面の蒸気シール用パッキンに接触する状態で挿入操作されたような場合にも、内蓋一端側が筒状壁構造のリブに当たって蒸気シール用パッキンよりも上方側に位置規制されるようになるので、従来のように蒸気シール用パッキンのパッキン片部分を捲るようなことがなくなる。   According to such a configuration, when the inner lid is attached, an inclination angle between the inner lid and the lower surface of the outer lid when one end of the inner lid is to be inserted and locked toward the inner lid locking portion on the one end side of the inner cover. Even when the inner lid is inserted and operated in contact with the steam seal packing on the lower surface of the outer lid, one end of the inner lid hits the rib of the cylindrical wall structure and is positioned above the steam seal packing. Since it becomes regulated, there is no longer a case where the packing piece portion of the packing for steam sealing is crushed.

また、放熱板を内鍋の開口に対応した十分に広い面積のものとすることができ、放熱板側の蓋ヒータの配設密度、配設面積を十分に大きく、かつ均一なものとすることができることから、上方から下方への加熱効果が向上し（均一かつ高効率になり）、内蓋や内鍋部分の露付きが生じにくくなる。   In addition, the heat sink can have a sufficiently wide area corresponding to the opening of the inner pan, and the density and area of the cover heater on the heat sink side must be sufficiently large and uniform. Therefore, the heating effect from the upper side to the lower side is improved (becomes uniform and highly efficient), and the inner lid and the inner pot portion are less likely to be exposed.

さらに、上記放熱板の径の拡大に対応して、蒸気シール用パッキンの直径をも十分に大きなものとすることができるので、炊飯時における内蓋との間のおねば収容空間も十分に大きなものとなり、おねばの吹きこぼれが生じにくくなる。   Furthermore, since the diameter of the steam seal packing can be made sufficiently large in response to the expansion of the diameter of the heat radiating plate, the accommodation space between the inner lid at the time of rice cooking is also sufficiently large. It becomes a thing, and it becomes difficult to produce a spill of rice crackers.

これらの結果、炊飯時のご飯の炊き上り、保温時のご飯の保温状態が良好となる。   As a result, the cooked rice at the time of cooking rice and the heat insulation state of the rice at the time of heat insulation become good.

（３） 請求項３の発明
この発明の電気炊飯器の蓋ユニットは、上記請求項１又は２の発明の構成において、筒状壁構造のリブは、蒸気シール用パッキンの外周部に隣接し、その全周を囲んで設けられていることを特徴としている。 (3) Invention of Claim 3 The cover unit of the electric rice cooker of this invention is the structure of the said invention of Claim 1 or 2, The rib of a cylindrical wall structure is adjacent to the outer peripheral part of the packing for steam seals, It is characterized by being provided around the entire circumference.

このような構成によると、内蓋の取付時において、内蓋の一端側を内カバーの一端側内蓋係止部に向けて挿入係止しようとする時に、外蓋下面との間の傾斜角が小さく、内蓋が外蓋下面の蒸気シール用パッキンに接触する状態で挿入操作されたような場合にも、内蓋一端側が、蒸気シール用パッキンの外周部に隣接し、その全周を囲んで設けられた筒状壁構造のリブに当たって蒸気シール用パッキンよりも上方側に位置規制されるようになるので、従来のように蒸気シール用パッキンのパッキン片部分を捲るようなことがなくなる。   According to such a configuration, when the inner lid is attached, an inclination angle between the inner lid and the lower surface of the outer lid when one end of the inner lid is to be inserted and locked toward the inner lid locking portion on the one end side of the inner cover. Even when the inner lid is inserted and operated in contact with the steam seal packing on the lower surface of the outer lid, one end of the inner lid is adjacent to the outer periphery of the steam seal packing and surrounds the entire circumference. Since the position of the cylindrical wall structure provided in the above is restricted to the upper side of the seal for the steam seal, the packing piece portion of the seal for the steam seal is not crushed as in the prior art.

また、同所定の高さの筒状壁構造のリブが蒸気シール用パッキンの外周に隣接し、その全周に亘って設けられていると、炊飯時、内鍋内の内圧の上昇により内蓋が上昇した時にも、全周に亘って傾きなく均一に上昇規制されるようになるので、リブがない場合に比べて一層蒸気シール用パッキンのシール性が良くなる。   In addition, if the rib of the cylindrical wall structure of the same predetermined height is adjacent to the outer periphery of the seal for steam seal and is provided over the entire periphery, the inner lid is increased due to the increase of the internal pressure in the inner pot during rice cooking. Even when the temperature rises, the rise is uniformly regulated without inclination over the entire circumference, so that the sealing performance of the steam seal packing is further improved as compared with the case without ribs.

さらに、またリブが有効な補強部材となり、内カバー部分の成型時の引け等による変形もなくなり、成型精度が向上する。   Further, the rib becomes an effective reinforcing member, and deformation due to shrinkage or the like at the time of molding of the inner cover portion is eliminated, and molding accuracy is improved.

以上の結果、本願発明によると、外蓋と内蓋との間のシール性が良好になり、炊飯性能、保温性能の高い電気炊飯器を提供できるようになる。   As a result, according to the present invention, the sealability between the outer lid and the inner lid is improved, and an electric rice cooker with high rice cooking performance and heat retention performance can be provided.

本願発明の実施の形態に係る電気炊飯器の蓋ユニットおよび同蓋ユニットを適用して構成した電気炊飯器全体の構成を示す前後方向の断面図である。It is sectional drawing of the front-back direction which shows the structure of the whole electric rice cooker comprised by applying the lid unit of the electric rice cooker which concerns on embodiment of this invention, and the lid unit. 同電気炊飯器全体の構成を示す左右方向の断面図である。It is sectional drawing of the left-right direction which shows the structure of the whole electric rice cooker. 同電気炊飯器の蓋ユニット部分の構成を示す下面図である。It is a bottom view which shows the structure of the cover unit part of the electric rice cooker. 同電気炊飯器の蓋ユニットの外蓋に対する内蓋の取付状態（取付時の挿入角が大きい状態）を示す説明用の断面図である。It is sectional drawing for description which shows the attachment state (state with a large insertion angle at the time of attachment) of the inner cover with respect to the outer cover of the cover unit of the electric rice cooker. 同電気炊飯器の蓋ユニットの外蓋に対する内蓋の取付状態（取付時の挿入角が小さい状態）を示す説明用の断面図である。It is sectional drawing for description which shows the attachment state (state where the insertion angle at the time of attachment is small) with respect to the outer cover of the cover unit of the electric rice cooker. 従来の電気炊飯器の蓋ユニットの外蓋に対する内蓋の取付状態（取付時の挿入角が大きい状態）を示す説明用の断面図である。It is sectional drawing for description which shows the attachment state (state with a large insertion angle at the time of attachment) of the inner cover with respect to the outer cover of the cover unit of the conventional electric rice cooker. 同軸従来の電気炊飯器の蓋ユニットの外蓋に対する内蓋の取付状態（取付時の挿入角が小さい状態）を示す説明用の断面図である。It is sectional drawing for description which shows the attachment state (state where the insertion angle at the time of attachment is small) with respect to the outer cover of the cover unit of the coaxial conventional electric rice cooker.

先ず図１〜図５は、本願発明の実施の形態に係る電気炊飯器の蓋ユニットの構成と同蓋ユニットを適用して構成される電気炊飯器本体の構成をそれぞれ示している。   First, FIGS. 1-5 has each shown the structure of the electric rice cooker main body comprised by applying the structure of the cover unit of the electric rice cooker which concerns on embodiment of this invention, and the cover unit.

（電気炊飯器の全体的な構成）
先ず本願発明の実施の形態における電気炊飯器の蓋ユニットを適用して構成される電気炊飯器の炊飯器本体１は、例えば内鍋（飯器）３として電磁誘導の可能な磁性金属板よりなるものが採用されている一方、当該内鍋３に対する炊飯時の加熱手段として、外ケース４内に所定の間隔を保って設けられた合成樹脂製の内ケース８を介して、当該内鍋３の底壁部３ａから側壁部３ｂの略全体を包み込むように当該内鍋３の底壁部３ａの中央部側と側方部側に対応する第１，第２の２組のワークコイルＣ1，Ｃ2が設けられ、また当該内鍋３に対する保温時等の加熱手段として、当該内鍋３の側壁部３ｂの全周に対応する保温ヒータＨ1が設けられている。 (Overall configuration of electric rice cooker)
First, a rice cooker body 1 of an electric rice cooker configured by applying the lid unit of the electric rice cooker in the embodiment of the present invention is made of, for example, a magnetic metal plate capable of electromagnetic induction as an inner pot (rice cooker) 3. On the other hand, as a heating means at the time of rice cooking with respect to the inner pot 3, the inner pot 3 of the inner pot 3 is provided through an inner case 8 made of synthetic resin provided at a predetermined interval in the outer case 4. First and second sets of work coils C 1 corresponding to the center side and the side of the bottom wall 3a of the inner pot 3 so as to wrap substantially the entire side wall 3b from the bottom wall 3a, C 2 is provided, and a heating heater H 1 corresponding to the entire circumference of the side wall portion 3 b of the inner pot 3 is provided as a heating means for keeping the inner pot 3 warm.

外ケース４は、筒状の金属製の側壁部４ａと該側壁部４ａの下部側に嵌合一体化された皿状の合成樹脂製の底壁部４ｂとからなり、その側壁部４ａの上端側を合成樹脂製の肩部材５を介して上記内ケース８の側壁部８ａの上端側に連結することによって相互に一体化され、それによって上部側が開口された有底筒状の炊飯器本体１を形成している。   The outer case 4 includes a cylindrical metal side wall portion 4a and a dish-shaped synthetic resin bottom wall portion 4b fitted and integrated with a lower side of the side wall portion 4a. The upper end of the side wall portion 4a. The bottomed cylindrical rice cooker body 1 which is integrated with each other by connecting the sides to the upper end side of the side wall portion 8a of the inner case 8 through a shoulder member 5 made of synthetic resin, thereby opening the upper side. Is forming.

そして、該炊飯器本体１の上記上部側の開口部には、上記肩部材５の後端側に設けられたヒンジ部６を介して、前後方向に開閉する蓋ユニット２が着脱可能な状態で設けられている。   And in the opening part of the said upper side of this rice cooker main body 1, the cover unit 2 opened and closed in the front-back direction is removable via the hinge part 6 provided in the rear-end side of the said shoulder member 5. Is provided.

該蓋ユニット２は、その上部側外周面を構成するとともに中央部に調圧部材４０設置用の凹部２１ａを備えた合成樹脂製の外カバー２１と、該外カバー２１の外周部下面側に係合一体化して設けられ、その内周側円形の開口部２２ａ内に蒸気シール用パッキン２３を介して伝熱性の良い金属よりなる円形の放熱板２４が嵌合一体化された合成樹脂製の内カバー２５とからなる外蓋２６と、該外蓋２６の上記内カバー２５の下面側に一端側所定の係止部材および他端側所定の係合部材を介して着脱可能に係合一体化された金属製の内蓋２８とを備えて構成されている。上記外蓋２６の放熱板２４の上面には、蓋ヒータＨ2がその全周面に亘って波形に配設されている。 The lid unit 2 constitutes an outer peripheral surface of the upper side and has an outer cover 21 made of a synthetic resin provided with a recess 21a for installing the pressure adjusting member 40 at the center, and a lower surface side of the outer peripheral portion of the outer cover 21. A synthetic resin inner member provided with a circular heat sink 24 made of a metal having good heat conductivity through a steam seal packing 23 in a circular opening 22a on the inner peripheral side. An outer lid 26 composed of a cover 25 and a lower surface side of the inner cover 25 of the outer lid 26 are detachably engaged and integrated through a predetermined locking member on one end side and a predetermined engaging member on the other end side. And an inner lid 28 made of metal. The upper surface of the heat radiating plate 24 of the outer lid 26, the lid heater H 2 is disposed in the waveform over the entire peripheral surface thereof.

すなわち、この実施の形態の蓋ユニット２は、外カバー２１と、内カバー２２および放熱板２４との２つの構成部材よりなる閉断面断熱構造の外蓋２６と、該外蓋２６の下面側に着脱可能に取り付けて使用される平板構造の内蓋２８との２つの蓋体よりなっており、これらが適切に係合一体化された状態で、図１、図２のように上述の炊飯器本体１の上端側開口部に取り付けられて初めて適正な炊飯が可能となるように構成されている（詳細な構成については、後述する）。   That is, the lid unit 2 of this embodiment includes an outer cover 21, an outer cover 26 having a closed cross-section heat insulating structure made up of two components, an inner cover 22 and a heat sink 24, and a lower surface side of the outer cover 26. It consists of two lids with a flat-structured inner lid 28 that is used detachably, and in the state where these are properly engaged and integrated, the rice cooker described above as shown in FIGS. It is comprised so that proper rice cooking becomes possible only after attaching to the upper end side opening part of the main body 1 (it mentions later for a detailed structure).

一方、該電気炊飯器の上記炊飯／調理／保温の各機能に対するタイマー予約や炊飯および保温メニュー、加熱調理メニューの選択、それら各メニューに対応した加熱量、加熱パターン、保温温度、保温時間などの選択設定操作は、上記炊飯器本体１の前面側操作パネル部１０に設けられた各種入力スイッチ群（操作キー群）を介してユーザーにより行われ、その選択設定内容に応じて最終的に上記第１，第２のワークコイルＣ1，Ｃ2および保温ヒータＨ1、蓋ヒータＨ2が適切に駆動制御されるようになっている。 On the other hand, timer reservation, rice cooking and heat retention menu for each of the above rice cooking / cooking / heat retention functions of the electric rice cooker, selection of a heat cooking menu, heating amount corresponding to each menu, heating pattern, heat retention temperature, heat retention time, etc. The selection setting operation is performed by the user through various input switch groups (operation key groups) provided on the front side operation panel unit 10 of the rice cooker body 1, and finally the above-mentioned selection operation is performed according to the selection setting contents. The first and second work coils C 1 and C 2, the heat retaining heater H 1 , and the lid heater H 2 are appropriately driven and controlled.

また、上記操作パネル部１０には、炊飯、調理（例えばパン発酵／焼きなど）、保温の各メニュー、設定された保温温度、設定保温時間、保温経過時間、現在時刻、タイマー炊飯予約時刻、炊飯完了，調理完了までの残時間、その他の各種必要事項を表示する液晶表示部１１が設けられている。   In addition, the operation panel unit 10 includes rice cooking, cooking (for example, bread fermentation / baking), heat retention menu, set heat retention temperature, set heat retention time, heat retention elapsed time, current time, timer rice reservation time, rice cooking A liquid crystal display unit 11 is provided for displaying completion, the remaining time until completion of cooking, and various other necessary items.

また、上記外ケース１の上記操作パネル部１０の内側部分（裏側空間部分）には、後述する内ケース８側制御基板９の上端部側上方位置から斜め前方に下降する格好で、操作基板（表示基板）７を保持した操作基板カバー７ａが上記操作パネル１０に平行な形で傾斜状態に設置されている。   Further, an inner portion (back side space portion) of the operation panel portion 10 of the outer case 1 is configured to descend obliquely forward from an upper position on the upper side of the inner case 8 side control substrate 9 described later. An operation board cover 7 a holding the display board 7 is installed in an inclined state in parallel with the operation panel 10.

一方、上記内ケース８の底壁部８ｂの下方側には、フェライトコアを備えたコイルカバー（コイル台）１２が設けられ、その上部に各々リッツ線が同心状に巻成された第１，第２の２組のワークコイルＣ1，Ｃ2が設けられており、それら各第１，第２のワークコイルＣ1，Ｃ2への通電時に上記内鍋３にうず電流を誘起して加熱するようになっている。 On the other hand, on the lower side of the bottom wall portion 8b of the inner case 8, a coil cover (coil base) 12 having a ferrite core is provided, and first and second Litz wires are concentrically wound on the upper portion thereof. The second two sets of work coils C 1 and C 2 are provided, and when the first and second work coils C 1 and C 2 are energized, an eddy current is induced in the inner pot 3 and heated. It is supposed to be.

上記内ケース８の側壁部８ａ（およびコイルカバー１２）の前方部側には、上記第１，第２のワークコイルＣ1，Ｃ2や駆動用のＩＧＢＴを備えたＩＨ回路、該ＩＨ回路のＩＧＢＴを駆動するＩＧＢＴ駆動回路、上記保温ヒータＨ1、蓋ヒータＨ2等を駆動制御するヒータ駆動回路、電源電圧整流用のダイオードブリッジおよびＣＲ回路よりなる整流平滑回路などの各種の回路を備えた制御基板９および該制御基板９を保持した制御基板カバー９ａが、上記内ケース８の側壁部８ａと略同等の高さで、上記外ケース４の左右両側壁部４ａ，４ａ間に位置して上下垂直方向に立設されている。 An IH circuit including the first and second work coils C 1 and C 2 and a driving IGBT on the front side of the side wall 8a (and the coil cover 12) of the inner case 8, and the IH circuit Various circuits such as an IGBT drive circuit for driving the IGBT, a heater drive circuit for driving and controlling the heat retaining heater H 1 , the lid heater H 2, etc., a diode bridge for power supply voltage rectification and a rectifying / smoothing circuit comprising a CR circuit are provided. A control board 9 and a control board cover 9a holding the control board 9 are located between the left and right side wall parts 4a, 4a of the outer case 4 at a height substantially equal to the side wall part 8a of the inner case 8. Stands vertically in the vertical direction.

上記内ケース８の皿状の底壁部８ｂの中央部には、その底面部の中央部に内鍋３の温度を検出する温度検出手段であるサーミスタを内装したセンターセンサーＳが設けられている。   At the center of the dish-shaped bottom wall 8b of the inner case 8, there is provided a center sensor S having a thermistor as temperature detecting means for detecting the temperature of the inner pot 3 at the center of the bottom. .

また、同炊飯器本体１の外ケース底壁部４ｂの前部側には格子構造の冷却風の導入口１３が形成されており、該冷却風の導入口１３の上部側には、電装品等冷却用のファン（短軸のプロペラファン）１４が設けられており、該電装品等冷却用のファン１４からの冷却風を炊飯器本体内の必要な部分に導入するようになっている。   In addition, an inlet 13 for cooling air having a lattice structure is formed on the front side of the outer case bottom wall 4b of the rice cooker body 1, and an electrical component is provided on the upper side of the inlet 13 for the cooling air. An equal cooling fan (short axis propeller fan) 14 is provided, and cooling air from the electric component cooling fan 14 is introduced into a necessary portion in the rice cooker body.

この電装品等冷却用のファン１４は、図示のように、その羽根車部の直径の略１／２部分を、上記制御基板カバー９部分を中心として、第１，第２のワークコイルＣ1，Ｃ2側の空間に対応させて設置されている一方、その他の略１／２部分を、上記制御基板９上のＩＧＢＴ等発熱部品放熱冷却用のヒートシンク１５および操作基板７側に対応させて設置されている。 As shown in the figure, the electric component cooling fan 14 has a first half and a second work coil C 1 centered on the control board cover 9 portion about a half of the diameter of the impeller portion. while being placed in correspondence with the space C 2 side, the other substantially half portion of, so as to correspond to the heat sink 15 and the operation panel 7 side of the IGBT for such heat generating component radiator cooling on the control board 9 is set up.

（蓋ユニットの具体的な構成）
次に、本願発明の特徴とする蓋ユニット２の外蓋２６および内蓋２８部分の具体的な構成について、さらに詳細に説明する。 (Specific configuration of lid unit)
Next, a specific configuration of the outer lid 26 and the inner lid 28 of the lid unit 2 that is a feature of the present invention will be described in more detail.

（１） 外蓋２６の構成
上記外蓋２６は、上述のように炊飯器本体１の上端側開口部の全体を覆うに適した大きさと形状の合成樹脂成形品よりなる外カバー２１と、該外カバー２１の外周面部内側に嵌合一体化された枠型の合成樹脂成形品よりなり、その内側の円形の開口部２２ａ内にラバー製の蒸気シール用パッキン２３を介して円形の放熱板２４を嵌合一体化した内カバー２２とからなっている。 (1) Configuration of the outer lid 26 The outer lid 26 includes an outer cover 21 made of a synthetic resin molded product having a size and shape suitable for covering the entire upper end side opening of the rice cooker body 1 as described above, It is made of a frame type synthetic resin molded product fitted and integrated on the inner side of the outer peripheral surface portion of the outer cover 21, and a circular heat radiating plate 24 is inserted into a circular opening 22a on the inner side through a rubber steam seal packing 23. And an inner cover 22 integrated with each other.

外カバー２１は、その略中央部に位置して調圧部材４０を設置するための調圧部材設置用凹部２１ａを備えて構成されており、同調圧部材設置用凹部２１ａ内には、炊飯時において内鍋３内の蒸気圧をコントロールするための調圧部材４０が、そのパッキン４０ｆを外装した筒状の嵌合口部４０ｇ部分を同調圧部材設置用凹部２１ａ内底部に設けた嵌合口部（開口部）２１ｂ内に着脱可能に嵌合する形で設置されている。   The outer cover 21 is provided with a pressure-regulating member installation recess 21a for installing the pressure-control member 40 at a substantially central portion thereof, and the synchronized pressure member installation recess 21a is provided during rice cooking. The pressure adjusting member 40 for controlling the steam pressure in the inner pot 3 has a fitting port portion (a fitting port portion provided with a cylindrical fitting port portion 40g with an outer packing 40f provided on the inner bottom portion of the tuning pressure member installation recess 21a). (Opening) 21b is detachably fitted into the opening 21b.

調圧部材４０は、頂部側傘型のキャップ部材４０ａと、該キャップ部材４０ａの中央部側下部にあって蒸気ボール４０ｂを昇降可能に収納した開放型の蒸気ボール収納ケース４０ｃと、該蒸気ボール収納ケース４０ｃの外周にあって、おねばと蒸気を分離し、おねばを内鍋３側（内蓋２８側）に戻すとともに蒸気を上記キャップ部材４０ａの蒸気穴４０ｄ，４０ｄ・・・から逃がす摺鉢型の下部ケース４０ｅとからなり、上記下部ケース４０ｅの上端側筒状の側壁部を上記キャップ部材４０ａ外周の下部側筒状の側壁部内側にヘリコイド係合することにより、以上の各々が図示のように調圧部材４０として結合一体化されている。   The pressure adjusting member 40 includes a top-side umbrella-type cap member 40a, an open-type steam ball storage case 40c that is located at the lower part of the center of the cap member 40a and stores the steam ball 40b so as to be movable up and down, and the steam ball It is on the outer periphery of the storage case 40c, separates the rice cake and steam, returns the rice cake to the inner pan 3 side (inner lid 28 side), and releases the steam from the steam holes 40d, 40d, ... of the cap member 40a. Each of the above is achieved by helicoidally engaging the upper side cylindrical side wall of the lower case 40e with the inner side of the lower side cylindrical side wall on the outer periphery of the cap member 40a. As shown in the figure, the pressure adjusting member 40 is combined and integrated.

上記外カバー２１の調圧部材設置用の凹部２１ａ内の調圧部材嵌合口部２１ｂ内に圧入嵌合される調圧部材４０側筒状の嵌合口部４０ｇは、上記下部ケース４０ｅの下端に形成されており、同筒状の嵌合口部４０ｇの下面側開口部には、下端外周におねば受け用の縁部４０ｈを備えた断面ハット形のラバー製パッキン４０ｉが下方側から嵌合係止されている。   The pressure adjusting member 40 side cylindrical fitting opening 40g press-fitted into the pressure adjusting member fitting opening 21b in the recess 21a for installing the pressure adjusting member of the outer cover 21 is formed at the lower end of the lower case 40e. A rubber packing 40i having a hat-shaped cross section having a receiving edge 40h on the outer periphery of the lower end is fitted into the opening on the lower surface side of the cylindrical fitting opening 40g. It has been stopped.

次に上記内カバー２２内周側の放熱板２４にも、その略中央部に位置して、上記外カバー２１の調圧部材嵌合口部２１ｂの径よりも少し大きい円形の開口２４ａが設けられており、上記内カバー２２が上記外カバー２１の外周部内側に係合一体化された状態では、同開口２４ａ部分をパッキン２５を介して上記外カバー２１の嵌合口２１ｂの外周部分に嵌合することにより、図１、図２に示すように係合一体化されている。   Next, the heat sink 24 on the inner peripheral side of the inner cover 22 is also provided with a circular opening 24a that is located substantially in the center and is slightly larger than the diameter of the pressure adjusting member fitting opening 21b of the outer cover 21. In the state where the inner cover 22 is engaged and integrated inside the outer peripheral portion of the outer cover 21, the opening 24 a portion is fitted to the outer peripheral portion of the fitting port 21 b of the outer cover 21 via the packing 25. By doing so, the engagement is integrated as shown in FIGS.

そして、同放熱板２４の上面側には、その開口２４ａを囲む形で蓋ヒータＨ2が全周方向に波形に配設されているとともに、さらに、その上面側にはアルミホイール等を介して所望の断熱材４１が配設されている。断熱材４１は、放熱板２４の上面から内カバー２２の上面の略全体に亘って設けられ、内カバー２２の後端部側に位置して、左右幅方向に延びるバインディング部材４２によって係止固定されている。 Then, the upper surface of the heat radiating plate 24, together with lid heater H 2 is provided to the waveform in the entire circumferential direction in a manner to surround the opening 24a, further, on its upper surface through an aluminum wheels and the like A desired heat insulating material 41 is disposed. The heat insulating material 41 is provided from the upper surface of the heat radiating plate 24 to substantially the entire upper surface of the inner cover 22, and is fixed by a binding member 42 that is positioned on the rear end side of the inner cover 22 and extends in the left-right width direction. Has been.

内カバー２２の後端は、左右幅方向に亘ってヒンジ軸６ａを取り付けるための左右一対のブラケット壁４３，４３が所定の間隔を保って設けられており、それらの間に架け渡される形でヒンジ軸６ａが挿通されており、同ヒンジ軸６ａには、一端４４ａ側を内カバー２２本体側の係止部４４ｂに係止する一方、他端側中間部４４ｃをヒンジ軸６ａにコイル状に巻装し、同巻装部側他端を上述の炊飯器本体１側ヒンジ部６の肩部材５の係合穴４４ｅ部分に係止し得るＵ字形の突出片４４ｄとした蓋開放用のバネ部材４４が設けられている。   The rear end of the inner cover 22 is provided with a pair of left and right bracket walls 43, 43 for attaching the hinge shaft 6a in the left-right width direction so as to be spanned between them. A hinge shaft 6a is inserted into the hinge shaft 6a. One end 44a of the hinge shaft 6a is engaged with the engagement portion 44b of the inner cover 22 main body, while the other end side intermediate portion 44c is coiled to the hinge shaft 6a. A spring for opening the lid which is wound and has a U-shaped protruding piece 44d which can be engaged with the engagement hole 44e portion of the shoulder member 5 of the above-described hinge portion 6 of the rice cooker body 1 side. A member 44 is provided.

内カバー２２の内周側円形の開口２２ａの内側には、上述のように蒸気シール用パッキン２３を介して放熱板２４が嵌合一体化されているわけであるが、同放熱板２４の嵌合部は次のように構成されている。   As described above, the heat sink 24 is fitted and integrated inside the inner peripheral circular opening 22a of the inner cover 22 through the steam seal packing 23. The joint section is configured as follows.

すなわち、内カバー２２内周の放熱板嵌合用の円形の開口２２ａの開口縁部２２ｂは、その外周側よりも少し段階状に低く形成されており、その内端面側に蒸気シール用パッキン２３の肉厚で筒状の本体部２３ａが当接され、同本体部２３ａ部分に放熱板２４外周の断面コ字形（ｈ形）に折り曲げられた嵌合部２４ｂに衝合されることにより、同本体部２３ａが、図示仮想線の起立状態から、図示実線のコの字状態に圧縮変形されて最終的に嵌合固定され、同固定状態において、その下方側断面くの字のパッキン部２３ｂが後述する内蓋２８の外周縁部２８ａの内端側に適切に当接して蒸気をシールするようになっている。   That is, the opening edge 22b of the circular opening 22a for fitting the heat sink on the inner periphery of the inner cover 22 is formed to be slightly lower than the outer peripheral side, and the steam seal packing 23 is formed on the inner end face side thereof. A thick and cylindrical main body portion 23a is brought into contact with the main body portion 23a, and the main body portion 23a is brought into contact with a fitting portion 24b which is bent into a U-shaped cross section (h shape) on the outer periphery of the heat radiating plate 24. The portion 23a is compressed and deformed from the standing state of the illustrated phantom line to the U-shaped state of the illustrated solid line and is finally fitted and fixed. In this fixed state, the packing portion 23b having a lower-side cross-sectional shape is described later. The steam is sealed by properly contacting the inner end side of the outer peripheral edge portion 28a of the inner lid 28.

上記外カバー２１および内カバー２２は、それぞれ外周縁側がスカート状に曲成されており、例えば外カバー２１外周縁部の内側面には第１の係合用凸部２１ｄが、また内カバー２２外周縁部の外側面には同第１の係合用凸部２１ｄに対応した第２の係合用凸部２２ｃが、それぞれ必要な位置に必要な数だけ相互に対応する形で設けられており、外カバー２１の内側に内カバー２２を嵌合した時の圧入方向の弾性変形力を利用して、それらを相互に摺動係合させて一体化するようになっている。   Each of the outer cover 21 and the inner cover 22 is curved in a skirt shape on the outer peripheral side. For example, a first engaging convex portion 21d is provided on the inner side surface of the outer peripheral portion of the outer cover 21, and On the outer surface of the peripheral edge portion, the second engaging convex portions 22c corresponding to the first engaging convex portions 21d are provided corresponding to the required number at the necessary positions, respectively. Using the elastic deformation force in the press-fitting direction when the inner cover 22 is fitted inside the cover 21, they are integrated by sliding engagement with each other.

この場合、第１の係合用凸部２１ｄ、第２の係合用凸部２２ｃ各々の対向面側は、それぞれ相互に摺動しやすいテーパー面となっており、スムーズに係合する。   In this case, the opposing surface side of each of the first engaging convex portion 21d and the second engaging convex portion 22c is a tapered surface that can easily slide relative to each other, and smoothly engages.

（２） 内蓋の構成
他方、内蓋２８は、図示のように、内鍋３の開口部に対応する中央部２８ｂの全体が、その外周縁部２８ａよりも低い皿形の構造を有して形成されており、同高さが高い外周縁部２８ａの下面側に内鍋シール用のパッキン２８ｃを嵌合して構成されている。 (2) Structure of inner lid On the other hand, as shown in the figure, the inner lid 28 has a dish-like structure in which the entire central portion 28b corresponding to the opening of the inner pot 3 is lower than the outer peripheral edge portion 28a. The inner pot seal packing 28c is fitted to the lower surface side of the outer peripheral edge portion 28a having the same height.

この内蓋２８は、上記外周縁部２８ａの後端側（一端側）左右２つの位置に所定の間隔を置いて、上記内カバー２２の爪部材係合用凹部（内蓋係止部）２２ｅ，２２ｅに対応した断面Ｖ字構造をなす爪部材２８ｄ，２８ｄを備えるとともに、前端側（他端側）左右の２つの位置に上記内カバー２２前端側（他端側）の左右の係合凹部２２ｆ，２２ｆに係合する一対の係合部材２８ｅ，２８ｅを備えて支持されている。   The inner lid 28 has a claw member engaging recess (inner lid engaging portion) 22e of the inner cover 22 at predetermined intervals at two positions on the rear end side (one end side) of the outer peripheral edge portion 28a. And claw members 28d, 28d having a V-shaped cross section corresponding to 22e, and left and right engaging recesses 22f on the front end side (the other end side) of the inner cover 22 at two positions on the front end side (the other end side). , 22f and a pair of engaging members 28e, 28e.

上記爪部材２８ｄ，２８ｄは、ホルダー２８ｆ，２８ｆ内に外方に突出付勢するバネ部材を有して弾性的に構成されている。   The claw members 28d and 28d are elastically configured to have spring members that project and urge outward in the holders 28f and 28f.

また、係合部材２８ｅ，２８ｅは、半径方向の内外方向に弾性変形可能な下方側へ向いた起立片よりなり、下端側に操作片２２ｈ，２２ｈ、中間部に内カバー２２の係合凹部２２ｆ，２２ｆへの係合用の凸部２８ｇ，２８ｇを備えて構成されている。   Further, the engaging members 28e, 28e are formed of standing pieces facing downward that can be elastically deformed radially inward and outward, operating pieces 22h, 22h on the lower end side, and engaging recesses 22f of the inner cover 22 on the intermediate part. , 22f is provided with convex portions 28g, 28g for engagement.

そして、該内蓋２８は、上記後端側爪部材２８ｄ，２８ｄを、例えば図５、図６に示すように上記内カバー２２後端側の対応する支点側爪部材係合用凹部２２ｅ，２２ｅ内に挿入し、同挿入部分を支点として、その前端側を上記内カバー２２の前端側に向けて回動し、同前端側の係合部材２８ｅ，２８ｅの係合用凸部２８ｇ，２８ｇを内カバー２２側の係合凹部２２ｆ，２２ｆに係合させることによって、図１〜図３のように一体化する。   The inner lid 28 is arranged so that the rear end side claw members 28d, 28d are disposed in the corresponding fulcrum side claw member engaging recesses 22e, 22e on the rear end side of the inner cover 22 as shown in FIGS. The front end side of the inner cover 22 is turned toward the front end side of the inner cover 22 with the insertion portion as a fulcrum, and the engaging projections 28g and 28g of the engaging members 28e and 28e on the front end side are used as the inner cover. By engaging with the engagement recesses 22f and 22f on the 22 side, they are integrated as shown in FIGS.

（本願発明の要旨）
ところで、以上のように内蓋２８を外蓋２６下面の内カバー２２部分に取り付けるに際し、すでに図６、図７の従来例の説明で述べたように、内カバー２２の爪部材係合用凹部２２ｅ，２２ｅに対する内蓋２８後端側爪部材２８ｄ，２８ｄの挿入角度θが所定角度以上に小さい場合（図６の場合）、そのままでは、爪部材２８ｄ，２８ｄ挿入時に、放熱板２４外周の蒸気シール用パッキン２３のパッキン部分２３ｂを大きく捲ってしまい、同パッキン部分２３ｂがパッキンとして機能しない状態で内蓋２８が内カバー２２に固定されてしまう問題が生じる。 (Summary of the Invention of the Present Application)
By the way, when the inner lid 28 is attached to the inner cover 22 portion on the lower surface of the outer lid 26 as described above, the claw member engaging recess 22e of the inner cover 22 as already described in the description of the conventional example of FIGS. , 22e, when the insertion angle θ of the rear end side claw members 28d, 28d of the inner lid 28 is smaller than a predetermined angle (in the case of FIG. 6), the steam seal on the outer periphery of the heat radiating plate 24 is left as it is. The packing portion 23b of the packing 23 is greatly wound, and the inner lid 28 is fixed to the inner cover 22 in a state where the packing portion 23b does not function as a packing.

ところが、図１〜図５の各々に示すように、本実施の形態では、上記内カバー２２には、その開口縁部２２ｂの蒸気シール用パッキン２３の外周に沿う部分に（沿って隣接する部分に）、そのパッキン部分２３ｂの略中間部（くの字状の変曲点位置付近）に至る高さの筒壁状のリブＬが一体に成型されている。   However, as shown in each of FIGS. 1 to 5, in the present embodiment, the inner cover 22 has a portion along the outer periphery of the steam seal packing 23 of the opening edge 22 b (a portion adjacent to the inner cover 22. In addition, a cylindrical wall-like rib L having a height reaching a substantially middle portion (near the position of the inflection point of the U-shape) of the packing portion 23b is integrally formed.

したがって、例えば図４に示すように、内蓋２８後端側爪部材２８ｄ，２８ｄの内カバー２２の爪部材係合用凹部２２ｅ，２２ｅに対する挿入角θが大きい場合はもちろん、例えば図５に示すように所定値以上に小さい場合にも、その先端側が同リブＬにより、蒸気シール用パッキン２３のパッキン部分２３ｂのくの字状の変曲点部分付近の高い位置でガイドされて、蒸気シール用パッキン２３のパッキン部分２３ｂを捲ることなく、スムーズに内蓋２８が取り付けられるようになる。   Therefore, for example, as shown in FIG. 4, the insertion angle θ of the inner lid 28 rear end side claw members 28d, 28d with respect to the claw member engaging recesses 22e, 22e is large as shown in FIG. Even if it is smaller than a predetermined value, the tip end side is guided by the rib L at a high position near the arcuate inflection point portion of the packing portion 23b of the steam seal packing 23, and the steam seal packing The inner lid 28 can be smoothly attached without squeezing the 23 packing portion 23b.

その結果、良好な炊飯性能が確保される。   As a result, good rice cooking performance is ensured.

特に、同構成では、放熱板２４を内鍋３の開口に対応した十分に広い面積のものとすることができ、蓋ヒータＨ2の配設密度、配設面積を十分に大きく、かつ均一なものとすることができることから、上方から下方への加熱効果が向上し（均一かつ高効率になり）、内蓋２８や内鍋３部分の露付きが生じにくくなる。 In particular, in this configuration, can be of sufficiently large area that corresponds to the heat radiating plate 24 to the opening of the inner bowl 3, the density of arrangement of the lid heater H 2, sufficiently large arranged area, and uniform Therefore, the heating effect from the upper side to the lower side is improved (becomes uniform and highly efficient), and the inner lid 28 and the inner pot 3 are less likely to be exposed.

さらに、上記放熱板２４の径の拡大に対応して、蒸気シール用パッキン２３の直径をも十分に大きなものとすることができるので、炊飯時における内蓋２８との間のおねばの収容空間も十分に大きなものとなり、おねばの吹きこぼれが生じにくくなる。   Furthermore, since the diameter of the steam seal packing 23 can be made sufficiently large in response to the increase in the diameter of the heat radiating plate 24, a space for accommodating a space between the inner lid 28 and the rice lid during cooking is provided. Will be large enough, and it will be difficult for spills to occur.

また、同所定の高さのリブＬが蒸気シール用パッキン２３の全周に亘って設けられていることから、炊飯時、内鍋３内の内圧の上昇により内蓋２８が上昇した時にも、全周に亘って傾きなく均一に上昇規制されるようになるので、リブＬがない場合に比べて一層蒸気シール用パッキン２３のシール性が良くなる。   In addition, since the rib L of the predetermined height is provided over the entire circumference of the steam seal packing 23, during cooking, when the inner lid 28 rises due to an increase in internal pressure in the inner pot 3, Since the rise is regulated uniformly without inclination over the entire circumference, the sealing performance of the steam seal packing 23 is further improved as compared with the case without the rib L.

これらの結果、炊飯時のご飯の炊き上り、保温時のご飯の保温状態がともに良好となる。   As a result, both the cooked rice at the time of cooking and the warmed state of the cooked rice are good.

さらに、またリブＬが有効な補強部材となり、内カバー２２部分の成型時の引け等による変形もなくなり、成型精度が向上する。   Further, the rib L becomes an effective reinforcing member, and deformation due to shrinkage or the like at the time of molding of the inner cover 22 portion is eliminated, and molding accuracy is improved.

（他の実施の形態）
以上の実施の形態では、リブＬを筒状壁構造のものとし、同リブＬが蒸気シール用パッキン２３の全周に亘って設けられるようにしたが、該リブＬは、例えば内蓋２８後端側爪部材２８ｄ，２８ｄの内カバー２２の爪部材係合用凹部２２ｅ，２２ｅに対する挿入角θが所定値以上に小さい場合に、その先端側が同リブＬにより、蒸気シール用パッキン２３のパッキン部分２３ｂのくの字状の変曲点部分付近の高い位置でガイドされて、蒸気シール用パッキン２３のパッキン部分２３ｂを捲ることなく、スムーズに内蓋２８が取り付けられるようにすることのみを考えるのであれば、同ガイド作用を果す部分に必要な形状の凸状部を部分的に設けるようにすれば足りる。 (Other embodiments)
In the above embodiment, the rib L has a cylindrical wall structure, and the rib L is provided over the entire circumference of the steam seal packing 23. When the insertion angle θ of the end side claw members 28d, 28d with respect to the claw member engaging recesses 22e, 22e of the inner cover 22 is smaller than a predetermined value, the tip side thereof is the packing portion 23b of the steam seal packing 23 by the rib L. It is only considered that the inner lid 28 can be attached smoothly without being swung around the packing portion 23b of the steam seal packing 23, being guided at a high position in the vicinity of the inflection point portion of the square shape. For example, it suffices if a convex portion having a necessary shape is partially provided in a portion that performs the guide action.

１は炊飯器本体、２は蓋ユニット、２１は外カバー、２２は内カバー、２３は蒸気シール用パッキン、２３ａは本体部分、２３ｂはパッキン部分、２４は放熱板、２６は外蓋、２８は内蓋、Ｈ2は蓋ヒータ、Ｌはリブである。 DESCRIPTION OF SYMBOLS 1 is a rice cooker main body, 2 is a lid unit, 21 is an outer cover, 22 is an inner cover, 23 is a packing for steam seals, 23a is a main body part, 23b is a packing part, 24 is a heat sink, 26 is an outer lid, 28 is An inner lid, H 2 is a lid heater, and L is a rib.

Claims (3)

外周面を形成する外カバーおよび該外カバーの外周部内側に位置して係合固定され、その内周側開口部に蒸気シール用のパッキンを介して放熱板を嵌合一体化した内カバーよりなる外蓋と、一端側を上記外蓋下面側の上記内カバーの一端側に設けた係止部に係止する一方、同係止部を支点として、その他端側を上記内カバーの他端側に回動させ、同内カバーの他端側に設けた所定の係合部に係合することによって、上記蒸気シール用のパッキンを挟んで上記外蓋の下面に着脱可能に取り付けられる内蓋とを備え、内鍋を収納した電気炊飯器本体に対し、その上部を覆って開閉可能に取り付けられる電気炊飯器の蓋ユニットであって、上記内カバー内周側の上記蒸気シール用パッキンと上記支点側係止部との間に、上記内蓋の一端側を上記支点側係止部に挿入係止する時の上記蒸気シール用パッキンの捲れを回避する所定の高さの凸状部を設けたことを特徴とする電気炊飯器の蓋ユニット。   An outer cover that forms the outer peripheral surface and an inner cover that is engaged and fixed inside the outer peripheral portion of the outer cover, and a heat sink is fitted and integrated into the inner peripheral opening through a steam seal packing. And the other end side of the inner cover is the other end of the inner cover, with one end side being locked to a locking portion provided on one end side of the inner cover on the lower surface side of the outer lid. The inner lid is detachably attached to the lower surface of the outer lid with the steam seal packing interposed therebetween by rotating to the side and engaging with a predetermined engaging portion provided on the other end side of the inner cover And an electric rice cooker body housing the inner pot, covering the upper part of the electric rice cooker lid unit, and being attached so as to be openable and closable, the steam seal packing on the inner peripheral side of the inner cover and the above Between the fulcrum side locking part, the one end side of the inner lid is connected to the fulcrum The lid unit of the electric rice cooker, characterized in that a convex portion of the predetermined height to avoid the curling of the steam seal packing when inserting locking the engaging portion. 凸状部が、筒状壁構造のリブであることを特徴とする請求項１記載の電気炊飯器の蓋ユニット。   2. The lid unit for an electric rice cooker according to claim 1, wherein the convex portion is a rib having a cylindrical wall structure. 筒状壁構造のリブは、蒸気シール用パッキンの外周部に隣接し、その全周を囲んで設けられていることを特徴とする請求項２記載の電気炊飯器の蓋ユニット。   The lid unit for an electric rice cooker according to claim 2, wherein the rib of the cylindrical wall structure is provided adjacent to the outer peripheral portion of the packing for steam seal and surrounding the entire periphery thereof.
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KR20180060656A (en) * 2016-11-29 2018-06-07 주식회사 대유위니아 Electric pressure cooker

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JPH02234720A (en) * 1989-03-09 1990-09-17 Mitsubishi Electric Corp Electric rice cooker
JP3082642B2 (en) * 1995-11-06 2000-08-28 タイガー魔法瓶株式会社 Electric rice cooker
JPH09313341A (en) * 1996-05-29 1997-12-09 Matsushita Electric Ind Co Ltd Rice cooker
JP3498699B2 (en) * 2000-11-13 2004-02-16 タイガー魔法瓶株式会社 rice cooker
JP3899901B2 (en) * 2001-11-07 2007-03-28 松下電器産業株式会社 rice cooker
JP4649424B2 (en) * 2006-05-17 2011-03-09 パナソニック株式会社 rice cooker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180060656A (en) * 2016-11-29 2018-06-07 주식회사 대유위니아 Electric pressure cooker
KR102492361B1 (en) 2016-11-29 2023-01-30 주식회사 위니아 Electric pressure cooker

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