JP5656767B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker having an annular lid packing that seals between an inner pot accommodated in a main body and a lid.

  Generally, a rice cooker has a main body, an inner pot having a flange and detachably housed in the main body, a lid that covers the upper surface opening of the main body so as to be opened and closed, and an annular seal between the lid and the flange of the inner pot With a lid packing. As the lid packing, a base part attached to the lid side, extending from the base part toward the outer peripheral side, folded back from the outer peripheral side to the lower inner peripheral side, the distal end side of the folded part is extended upward, and the distal ends thereof are opposed to each other A configuration that abuts on the lower surface of the lid has been proposed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-087123 (FIG. 2)

  However, in the structure in which the front end side of the folded portion of the lid packing is extended upward and the front end abuts against the opposite lid lower surface, the aspect of the contact portion of the lid packing with the flange of the inner hook is a line. When the internal pressure rises as a result of contact, the extension piece acts in a direction away from the inner flange portion, the pointed portion of the contact portion is pushed up and separated from the flange, a gap is generated, and the sealing performance is deteriorated. There was a problem.

  In addition, if the wrap at the tip of the folded part of the lid packing (the part that touches the lower surface of the lid) is enlarged, the lid packing needs to be crushed when closing the lid, and the lid closing force becomes heavy. .

  The present invention has been made to solve the above-described problems, and can improve the sealing performance of the inner hook flange portion by the lid packing and can reduce the condensation amount of the lid packing. An object is to provide a rice cooker that does not increase the force of closing the lid.

  A rice cooker according to the present invention seals between a main body, an inner pot having a flange and detachably housed in the main body, a lid that covers the upper surface opening of the main body so as to be opened and closed, and a lid and a flange of the inner pot. In the rice cooker having a flexible annular lid packing, the lid packing extends from the base portion toward the outer peripheral side and is folded from the outer peripheral side to the lower inner peripheral side. A lower oscillating piece in which a first cavity is formed on the inner peripheral side of the folded portion, and a branch position formed by branching from a portion that is formed smaller than the lower oscillating piece and extends from the base toward the outer peripheral side. And an upper swinging piece formed with a second cavity that is always opened inward on the inner peripheral side of the folded part, and when the lid is opened, A gap is formed between the tips, and when the lid is closed, the tip of the lower swinging piece becomes the tip of the upper swinging piece. It is obtained by the contact configuration.

In the rice cooker of the present invention, since the upper swinging piece of the lid packing is formed in a lip shape that always opens inward, when the internal pressure (vapor pressure) of the inner pot rises, the upper swinging piece In response, the lower swinging piece acts in a direction in which it is pressed against the flange of the inner hook. For this reason, the sealing performance between the lid by the lid packing and the flange of the inner hook can be improved by utilizing the steam pressure.
Further, since the upper swinging piece of the lid packing is formed smaller than the lower swinging piece and arranged on the inner peripheral side of the lower swinging piece, the area exposed to the vapor of the lid packing can be reduced. it can. For this reason, the amount of dew condensation on the lid packing can be reduced.
In addition, a two-stage swing piece structure consisting of an upper swing piece and a lower swing piece of the lid packing is adopted, and when the cover is closed, the lower swing piece is pressed against the flange of the inner hook and bent. Since the tip of the moving piece comes into contact with the tip of the upper swing piece, the force for closing the lid is light. Furthermore, production errors can be absorbed, and yield is improved.

It is a perspective view which shows the external appearance of the rice cooker which concerns on Embodiment 1 of this invention. It is the longitudinal cross-sectional view seen from the side of the rice cooker which concerns on Embodiment 1 of this invention. It is a perspective view which shows the rice cooker which concerns on Embodiment 1 of this invention in the state which opened the lid | cover. It is a perspective view which shows the inner cover assembly to which the cover packing of the rice cooker which concerns on Embodiment 1 of this invention was attached. It is principal part sectional drawing at the time of the case without an inner pot of the rice cooker which concerns on Embodiment 1 of this invention (packing free state similar to the time of lid opening). It is principal part sectional drawing at the time of the inner pot presence of the rice cooker which concerns on Embodiment 1 of this invention (packing compression state similar to the time of a lid closing). It is explanatory drawing of the item of the lid packing of the rice cooker which concerns on Embodiment 1 of this invention. It is explanatory drawing of the item of the lid packing of the rice cooker which concerns on Embodiment 1 of this invention. It is a perspective view which shows the inner cover assembly to which the cover packing of the rice cooker which concerns on Embodiment 2 of this invention was attached. It is principal part sectional drawing at the time of the case without an inner pot of the rice cooker which concerns on Embodiment 2 of this invention (packing free state similar to the time of a lid opening). It is principal part sectional drawing at the time of the inner pot presence of the rice cooker which concerns on Embodiment 2 of this invention (packing compression state similar to the time of a lid closing).

Embodiment 1. FIG.
FIG. 1 is a perspective view showing an appearance of a rice cooker according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view seen from the side of the rice cooker according to Embodiment 1 of the present invention. FIG. 3: is a perspective view which shows the rice cooker which concerns on Embodiment 1 of this invention in the state which open | released the lid | cover.
The rice cooker according to the first embodiment of the present invention has a main body 1 in which an inner pot 2 having a flange 2a as shown in FIGS. 1 to 3 is removably accommodated, and steam generated during cooking is diffused outside the main body. And a lid 4 that is hinged to the rear of the main body 1 so as to close the upper opening of the inner pot 2 so as to be openable and closable. It has a steam passage 5 that guides steam generated from an object to be heated in the pot 2 to the steam port 3. An engagement release button 6 for the lid 4 is provided on the front surface of the main body 1. A heating coil 7 for induction heating the inner hook 2 is provided below the inner hook 2 in the main body 1. A temperature sensor 8 is attached to the center of the bottom of the main body 1 to detect the heat generation temperature near the center by being urged upward and in contact with the bottom surface of the inner hook 2. The inner side of the lid 4 is constituted by an inner lid assembly 11. The inner lid assembly 11 is provided with an inner lid 13 that is heated by a lid heater 12 attached to the partition plate 14. The lid heater 12 is heated in order to prevent dew from condensing on the inner lid 13 at the time of cooking and keeping the rice. On the outer periphery of the inner lid 13 of the inner lid assembly 11, an annular lid packing 21 having flexibility for sealing between the lid 4 and the flange 2a of the inner hook 2 is attached.

FIG. 4 is a perspective view showing the inner lid assembly to which the lid packing of the rice cooker according to Embodiment 1 of the present invention is attached. FIG. 5: is principal part sectional drawing at the time of the case without an inner pot of the rice cooker which concerns on Embodiment 1 of this invention (packing free state similar to the time of a lid opening). FIG. 6: is principal part sectional drawing at the time of the inner pot presence of the rice cooker which concerns on Embodiment 1 of this invention (packing compression state similar to the time of lid closing).
The lid packing 21 attached to the inner lid assembly 11 includes a base portion 22 attached to the lid side as shown in FIGS. 4 to 6, and extends from the base portion 22 toward the outer peripheral side of the lid 4 and from the outer peripheral side to the lower inner periphery. The lower oscillating piece 26 is formed in a lip shape on the side, and a first cavity, that is, a cavity 24 is formed on the inner peripheral side of the folded portion. The lower oscillating piece 26 is formed smaller than the lower oscillating piece 26. A second cavity that is branched from the portion extending toward the outer peripheral side, folded back in a lip shape from the branch position to the lower inner peripheral side, and is always opened inward to the inner peripheral side of the folded portion. The upper swing piece 25 is formed. That is, the upper swing piece 25 is disposed on the inner peripheral side of the lower swing piece 26. In addition, a gap g is formed between the tips of the upper swing piece 25 and the lower swing piece 26, and when the cover is closed, the lower swing piece 26 is pressed against the flange 2a of the inner hook 2 to bend and lower swing. The tip of the piece 26 comes into contact with the tip of the upper swing piece 25 (FIG. 6). In FIG. 6, the tip of the lower swing piece 26 is in contact with the inner side of the tip of the upper swing piece 25. However, since the upper swing piece 25 itself is bent, the lower swing piece 26 slides. Because. Moreover, this is because the inner hook 2 has a thicker wall as an example, and when the inner hook 2 is thinner than that, the state shown in FIG. The lower oscillating piece 26 and the upper oscillating piece 25 abut on the tip side. As described above, the lid packing 21 can be provided with versatility by adopting the two-stage swinging piece structure including the upper swinging piece 25 and the lower swinging piece 26 in the lid packing 21.

  7 and 8 are explanatory diagrams of specifications of the lid packing of the rice cooker according to Embodiment 1 of the present invention. That is, the lip-shaped height dimension of the lower oscillating piece 26 in the free state as shown in FIG. 7 is A, the dimension of the gap g between the upper oscillating piece 25 and the tip of the lower oscillating piece 26 is C, As shown in FIG. 8, when the height of the lip shape of the lower swing piece 26 in the compressed state is B, the compression stroke (AB) of the lower swing piece 26 when the lid is closed is (A- B) It is set so that ≧ C.

  As described above, the rice cooker according to the first embodiment of the present invention is formed in a lip shape in which the upper swing piece 25 is always opened inward, so that the internal pressure (steam pressure) of the inner pot 2 increases. The upper rocking piece 25 receives the pressure and acts in the direction in which the lower rocking piece 26 is pressed against the flange 2 a of the inner hook 2. For this reason, the sealing performance between the lid 4 by the lid packing 21 and the flange 2a of the inner hook 2 can be improved by utilizing the steam pressure.

  Further, in the rice cooker according to Embodiment 1 of the present invention, the upper swing piece 25 is formed smaller than the lower swing piece 26 and is disposed on the inner peripheral side of the lower swing piece 26, so the lid packing 21. The area exposed to the steam can be reduced. For this reason, the amount of dew condensation on the lid packing 21 can be reduced.

  Further, the rice cooker according to the first embodiment of the present invention adopts a two-stage oscillating piece structure including an upper oscillating piece 25 and a lower oscillating piece 26, and when the lid 4 is closed, the lower oscillating piece 26. Is pressed against the flange 2a of the inner hook 2 and bent, and the tip of the lower swing piece 26 comes into contact with the tip of the upper swing piece 25. Therefore, the tip of the lid packing on the lower surface (fixed portion) of the conventional lid Thus, it is not necessary to crush the lid packing as in the abutting method, and the force for closing the lid 4 is light. Furthermore, production errors can be absorbed, and yield is improved.

  In addition, the rice cooker according to the first embodiment of the present invention is provided with cavities 23 and 24 inside the upper swing piece 25 and the lower swing piece 26, respectively, and when the lid is opened, the upper swing piece 25 and the lower swing piece 26 are provided. Since the gap g is formed between the upper swing piece 25 and the dew overflowing from the upper swing piece 25 when the lid 4 is opened, this dew can be received by the lower swing piece 26. It is possible to prevent the main body from being exposed to dew.

Embodiment 2. FIG.
FIG. 9 is a perspective view showing an inner lid assembly to which a lid packing of a rice cooker according to Embodiment 2 of the present invention is attached. FIG. 10: is principal part sectional drawing at the time of the case without an inner pot of the rice cooker which concerns on Embodiment 2 of this invention (packing free state similar to the time of a lid opening). FIG. 11: is principal part sectional drawing at the time of the inner pot presence of the rice cooker which concerns on Embodiment 2 of this invention (packing compression state similar to the time of lid closing). In each figure, the same reference numerals are given to portions corresponding to those of the first embodiment. In the description, reference is made to FIGS. 1 to 3 described above.
The rice cooker according to the second embodiment of the present invention has a periphery of a contact portion where the upper swing piece 25 and the lower swing piece 26 contact the lid packing 21A when the cover 4 is closed as shown in FIGS. The contact prevention convex portions 27 are provided at a plurality of locations in the direction (here, a plurality of locations in the circumferential direction of the upper swing piece 25). The close-up preventing convex portion 27 may be provided on the lower swinging piece 26 side. The other configuration is the same as that of the first embodiment described above, and has the same function as that of the first embodiment.

  In the rice cooker according to Embodiment 2 of the present invention, due to the adhesiveness of the lid packing 21A itself, the upper rocking piece 25 and the lower rocking piece 26 are prevented from coming into close contact with each other by the adhesion preventing convex portion 27. it can. For this reason, even when dew overflows and hangs down from the upper rocking piece 25 when the lid 4 is opened, this dew can be reliably received by the lower rocking piece 26 to prevent dew dripping on the main body. Can do.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Inner hook, 2a flange, 3 Steam port, 4 Cover, 5 Steam passage, 6 Disengagement button, 7 Heating coil, 8 Temperature sensor, 11 Inner cover assembly, 12 Cover heater, 13 Inner cover, 14 Partition plate, 21, 21A Lid packing, 22 Base, 23, 24 Cavity, 25 Upper swing piece, 26 Lower swing piece, g Gap, 27 Protrusion for preventing adhesion.

Claims (3)

A main body, an inner hook having a flange and detachably housed in the main body, a lid that covers the upper surface opening of the main body so as to be openable and closable, and a flexible seal that seals between the lid and the flange of the inner hook In the rice cooker having an annular lid packing with the properties,
The lid packing is
A base attached to the lid side;
A lower swinging piece extending from the base portion toward the outer peripheral side, folded back from the outer peripheral side to the lower inner peripheral side, and forming a first cavity on the inner peripheral side of the folded portion;
It is formed smaller than the lower swing piece, branches from a portion extending from the base portion toward the outer peripheral side, folded back from the branch position to the lower inner peripheral side, and is always inward on the inner peripheral side of the folded portion. An upper swinging piece formed with an open second cavity,
When the lid is opened, a gap is formed between the ends of these vertical swing pieces,
A rice cooker characterized in that when the lid is closed, the tip of the lower swing piece abuts on the tip of the upper swing piece. The lip height dimension of the lower swinging piece when the lid is open, the lip height dimension of the lower swinging piece when the lid is closed, and the lip height dimension of the lower swinging piece when the lid is closed, When the gap dimension of C is C,
The rice cooker according to claim 1, wherein (A−B) ≧ C is set.   The contact prevention convex part is provided in the several location of the circumferential direction of the contact part which the said upper rocking piece and the said lower rocking piece contact when a cover is closed, The claim 1 or Claim 2 characterized by the above-mentioned. rice cooker.

Images