JP2005058385A - Packing structure of pressure rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable packing members 7 and 11 to carry out a proper function of sealing without dropping out from between members 6 and 14 or 12 and 13 which apply pinching pressure or without deviation of the points of pinching pressure even when an external force is applied to projecting parts 18 and 28 of the packing members 7 and 11. <P>SOLUTION: A protruding part 23 is provided for one of members 6 and 14 which apply pinching pressure to the packing member 7 and the protruding part 23 is allowed to bite into the packing member 7. A protruding part 24 of one of the members 6 and 14 applying pinching pressure is fitted to a concave part 25 formed in the packing member 7. An anti-come-off part 21 which is thicker than a pinched and pressed part 20 is formed. In another way, the packing member 11 is brought into contact with a member 12 over an enough length. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a packing structure in a pressure rice cooker, and relates to a structure in which, when an external force is applied to the packing, the packing does not come out of the pinched portion and cannot maintain airtightness.

  FIG. 1 shows a pressure rice cooker 1, in which an inner pot 3 is accommodated in an exterior body 2, the inner pot 3 is heated by heating means 4 such as an electromagnetic heating device, and is accommodated in the inner pot 3. Cooking rice with water.

  Reference numeral 5 denotes a lid. A heat sink 6 provided on the lower surface of the cover covers the upper opening of the inner pot 3, and the inside of the inner pot 3 is kept airtight with a packing 7 formed to protrude from the peripheral edge of the heat sink 6. In addition, rice is cooked while applying pressure to the inner pot 3.

Further, the heat radiating plate 6 is provided with a pressure valve 8 for adjusting the pressure in the inner pot 3, and the vapor discharged from the pressure valve 8 separates the liquid component in the chamber 9 from the cap 10. It is supposed to be discharged. The cap 10 is sealed with a packing 11 with respect to the lid 5.
JP-A-11-262445 Utility Model Registration No. 2553854

  By the way, in this kind of pressure rice cooker 1, although the said heat sink 6 can be removed with respect to the lid | cover 5 for cleaning, in many cases, the packing 7 protruding from the heat sink 6 is pinched and pulled for the removal. There is a possibility that the packing 7 may come off or shift. If packing 7 shifts, adhesiveness with inner pot 3 will fall, the pressure in inner pot 3 may become insufficient, and the function as pressure rice cooker 1 may be spoiled.

  Further, the packing 11 of the chamber 9 not only projects from the inner surface of the bottom member 12 to seal the cap 10, but also has a function of sealing between the bottom member 12 and the upper member 13 of the chamber 9. If the packing 11 is displaced while the cap 10 is repeatedly attached and detached to clean the inner tongue, steam enters the lid 5 from between the bottom member 12 and the upper member 13, and the electrical equipment in the lid 5 There is a risk of disturbing the insulation of the part.

  This invention is made | formed in view of this situation, Comprising: It aims at providing the packing structure which hold | maintains the packings 7 and 11 in such a pressure rice cooker 1 reliably, and does not slip | deviate or come off with external force. It is what.

  Thus, the first invention of the present application is a pressure rice cooker in which the inner pot is accommodated in the exterior body, the inner pot is heated by a heating means, and the upper opening of the inner pot is covered airtight with a lid. A packing structure, in which an elastic packing is clamped and fixed between two members, a part of the packing projects from between the members, and the projecting part is pressed against other members to be airtight In the structure for sealing, the protruding portion is formed on at least one of the members that sandwich the packing, and the protruding portion is bitten into the packing to prevent the packing from coming off.

  The second invention of the present application also includes a packing structure in a pressure rice cooker in which an inner pot is housed in an exterior body, the inner pot is heated by a heating means, and the upper opening of the inner pot is covered with a lid. The elastic packing is clamped and fixed between the two members, a part of the packing projects from between the members, and the projecting part is pressed against the other members to be airtightly sealed. In this structure, a protruding portion is formed on one of the members that sandwich the packing, and the protruding portion is fitted into a recess formed in the packing to prevent the packing from coming off. is there.

  Further, the third invention of the present application contains an inner pot in the exterior body, the inner pot is heated by heating means, and the packing structure in the pressure rice cooker in which the upper opening of the inner pot is covered with a lid in an airtight manner. The elastic packing is clamped and fixed between the two members, a part of the packing projects from between the members, and the projecting part is pressed against the other members to be airtightly sealed. In the structure, the packing is prevented from coming off by making the thickness of the packing opposite to the protruding portion from the overhanging portion larger than the interval between the two members holding the holding portion. It is what.

  Furthermore, the fourth invention of the present application contains an inner pot in the exterior body, the inner pot is heated by heating means, and the packing structure in the pressure rice cooker in which the upper opening of the inner pot is covered with a lid in an airtight manner. The elastic packing is clamped and fixed between the two members, a part of the packing projects from between the members, and the projecting part is pressed against the other members to be airtightly sealed. In the structure, the opposite side of the packing that is spaced from the overhanging portion by the clamping portion is brought into contact with one of the two members that clamp the clamping portion over a sufficiently long distance. It is characterized by preventing the packing from coming off.

  FIG. 2 shows a structure for attaching the packing 7 to the heat sink 6, 14 is a ring body provided along the outer periphery of the heat sink 6, and a hanging part 15 formed on the outer periphery of the heat sink 6 The ring body 14 is fitted in the concave groove 16.

  Further, the packing 7 has a horizontal portion 17 covering the lower surface of the ring body 14, and a protruding portion 18 is formed at the lower outer periphery of the horizontal portion 17, and the protruding portion 18 is formed at the upper opening of the inner pot 3. It is designed to be pressed and sealed. A vertical portion 19 extending upward is formed on the inner periphery of the horizontal portion 17, and the pressing portion 20 extends outward from the upper end of the vertical portion 19 along the lower surface of the heat radiating plate 6. The retaining portion 21 hangs downward from the outer periphery of the 20. The pinching portion 20 is pinched and fixed between the pressing portion 22 formed on the ring body 14 and the lower surface of the heat radiating plate 6.

  FIGS. 3A and 3B show a structure in which the first invention of the present application is applied to the structure for attaching the packing 7 to the heat radiating plate 6. Protrusions 23 are formed at the corners, and the protrusions 23 are bitten inside the corners of the pinching part 20 and the retaining part 21 of the packing 7, thereby preventing the protrusions 23.

  In the example of FIG. 3A, the protrusion 23 is a substantially right-angled edge, and in the example of FIG. 3B, the protrusion 23 is a protrusion bulging from the pressing portion 22. Each projecting portion 23 bites into the packing 7.

  FIG. 3C shows a structure in which the second invention of the present application is applied to the structure for attaching the packing 7 to the heat radiating plate 6. Thus, the protrusion 24 is fitted into a recess 25 formed in the packing 7 to prevent the packing from coming off.

  FIG. 3D shows a structure in which the third invention of the present application is applied to a structure for attaching the packing 7 to the heat radiating plate 6, and the thickness b of the retaining portion 21 in the packing 7 is determined by the clamping pressure. The distance a between the lower surface of the heat radiating plate 6 sandwiching the portion 20 and the front end surface of the pressing portion 22 of the ring body 14 is larger, so that the retaining portion 21 passes between the heat radiating plate 6 and the pressing portion 22. This prevents the packing 7 from coming off.

  FIG. 4 (a) shows a structure in which the fourth invention of the present application is applied to a structure for attaching the packing 11 to the chamber 9, and the packing 11 has a substantially inverted U shape, and the upper horizontal Is sandwiched between the upper end of the bottom member 12 and the lower end of the upper member 13. A seal portion 27 hangs down from the inner end of the pinching portion 26, and an overhang portion 28 formed on the seal portion 27 is pressed against the cap 10 and sealed. A retaining portion 29 is suspended from the outer end of the pinching portion 26.

  In the present invention, the retaining portion 29 of the packing 11 is brought into contact with the side surface of the bottom member 12 which is one of the two members sandwiching the clamping portion 26 over a sufficiently long distance. The friction prevents the packing 11 from coming off. The contact distance c of the retaining portion 29 with respect to the bottom member 12 is preferably larger than the distance d between the bottom member 12 and the upper member 13 that pinches the pinching portion 26, and is preferably 2 to 3 times the distance d.

  FIG. 4B shows a structure in which the third invention of the present application is applied to a structure for attaching the packing 11 to the chamber 9. In the present invention, the thickness e of the retaining portion 29 of the packing 11 is larger than the distance d between the bottom member 12 and the upper member 13 that sandwich the clamping portion 26, so that the retaining portion 29 is The packing 11 is prevented from coming off between the bottom member 12 and the upper member 13.

  In the present invention, even when an external force is applied to the overhang portions 18 and 28 of the packings 7 and 11, the packings 7 and 11 come out from between the members 6, 14, 12, and 13 that pinch it, and there is no clamping pressure. An appropriate sealing function can be performed without shifting.

  In the first invention, when the packing 7 is clamped between the heat sink 6 and the ring body 14, the protrusion 23 formed on the ring body 14 bites into the packing 7, thereby preventing the movement of the packing 7. , Prevent omission and slipping.

  In the second invention, the protrusion 24 formed on the ring body 14 is fitted in the recess 25 formed in the packing 7, so that the movement of the packing 7 is prevented by the protrusion 24 and the recess 25. , Omission and displacement are prevented.

  In the third invention, since the retaining portions 21 and 29 having large thicknesses are formed adjacent to the sandwiching portions 20 and 26 in the packings 7 and 11, the retaining portions 21 and 29 are the sandwiching portions. It is impossible to pass between the members sandwiching 20 and 26, and even if force is applied to the overhanging portions 18 and 28, the packings 7 and 11 do not move, and it is possible to prevent them from coming off or shifting. it can.

  Further, in the fourth invention, since a part of the packing 11 is in contact with the bottom member 12 over a sufficiently long distance, a large frictional force acts between them, and the packing is supported by the frictional force. 11 does not move, and slipping and shifting are prevented.

Center vertical section of pressure cooker Partially enlarged central longitudinal sectional view of the attachment part of the packing to the heat sink in the pressure cooker Partially enlarged central longitudinal sectional view of a state in which the first to third inventions are applied to the mounting portion of the packing to the heat sink Partially enlarged central longitudinal sectional view of the state in which the fourth and third inventions are applied to the attachment part of the packing to the chamber

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressure rice cooker 2 Exterior body 3 Inner pan 4 Heating means 5 Lid 6 Heat sink 7 and 11 Packing 9 Chamber 10 Cap 12 Bottom member 13 Upper member 14 Ring body 18, 28 Overhang | projection part 20, 26 Nipping part 21, 29 Detachment Stop part 23 Projection part 24 Projection part 25 Concave part

Claims (4)

The inner pot (3) is accommodated in the outer body (2), the inner pot (3) is heated by the heating means (4), and the upper opening of the inner pot (3) is covered with the lid (5). It is a packing structure in the pressure rice cooker (1) that is airtightly covered, and the elastic packing (7, 11) is sandwiched between two members (6, 14, 12, 13) and fixed, Part of the packing (7, 11) projects from between the members (6, 14, 12, 13), and the projecting portions (18, 28) are pressed against the other members (3, 10) to be airtight. In this structure, a protrusion (23) is formed on at least one of the members (6, 14, 12, 13) for sandwiching the packing (7, 11), and the protrusion (23) is connected to the packing ( 7, 11) prevents the packing (7, 11) from slipping out. It characterized the door, a packing structure in a pressure cooker The inner pot (3) is accommodated in the outer body (2), the inner pot (3) is heated by the heating means (4), and the upper opening of the inner pot (3) is covered with the lid (5). It is a packing structure in the pressure rice cooker (1) that is airtightly covered, and the elastic packing (7, 11) is sandwiched between two members (6, 14, 12, 13) and fixed, Part of the packing (7, 11) projects from between the members (6, 14, 12, 13), and the projecting portions (18, 28) are pressed against the other members (3, 10) to be airtight. The projecting portion (24) is formed on one of the members (6, 14, 12, 13) for clamping the packing (7, 11), and the projecting portion (24) is connected to the packing (7 , 11) and the packing (7, 11) is removed by fitting into the recess (25) formed in Wherein the preventing the packing structure in a pressure cooker The inner pot (3) is accommodated in the outer body (2), the inner pot (3) is heated by the heating means (4), and the upper opening of the inner pot (3) is covered with the lid (5). It is a packing structure in the pressure rice cooker (1) that is airtightly covered, and the elastic packing (7, 11) is sandwiched between two members (6, 14, 12, 13) and fixed, Part of the packing (7, 11) projects from between the members (6, 14, 12, 13), and the projecting portions (18, 28) are pressed against the other members (3, 10) to be airtight. The thickness of the packing (7, 11) on the opposite side of the overhanging portion (18, 28) from the overhanging portion (18, 28) is the same as the pressing portion (20, 26). By making it larger than the distance between the two members (6, 14, 12, 13) Characterized in that to prevent loss of Kkin (7,11), a packing structure in a pressure cooker The inner pot (3) is accommodated in the outer body (2), the inner pot (3) is heated by the heating means (4), and the upper opening of the inner pot (3) is covered with the lid (5). It is a packing structure in the pressure rice cooker (1) that is airtightly covered, and the elastic packing (7, 11) is sandwiched between two members (6, 14, 12, 13) and fixed. Part of the packing (7, 11) projects from between the members (6, 14, 12, 13), and the projecting portions (18, 28) are pressed against the other members (3, 10) to be airtight. In the structure for sealing, the opposite side of the packing (7, 11) with the pressing part (20, 26) separated from the overhanging part (18, 28) is sandwiched by the pressing part (20, 26). A sufficiently long distance with respect to one of the two members (6, 14, 12, 13) to be pressed Characterized in that to prevent loss of the packing (7, 11) by brought into contact, the packing structure in the pressure cooker

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