JPH0515860Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a rice cooker with an improved lid packing structure.

(Prior Art) As shown in FIG. 10, a conventional rice cooker of this type has a pot 3, which is a container, housed in an inner case 2 of a main body 1, and an opening on the top of the main body 1, which can be opened and closed. A lid 4 is provided on the bottom surface of the lid 4.
is provided, and the end of an annular packing 6 is clamped between the peripheral edge of the bottom plate 5 and the lid 4, and screws 7 are inserted.
Fixed by A flange portion 8 formed at the top opening of the pot 3 when the lid 4 is closed.
The tongue portion 6a of the gasket 6 protruding around the bottom plate 5 is brought into close contact with the pot 3 and the lid 4 to seal the space between the pan 3 and the lid 4.

(Problem to be solved by the invention) In the above conventional technology, when the lid 4 is closed, the pot 3
Since the tongue part 6a of the gasket 6 is configured to be in close contact with the flange portion 8 of the gasket 6, the airtightness of the gasket 6 is defective and it is difficult to seal the space between the pot 3 and the lid 4 from the atmosphere during cooking. There was a risk of steam leakage.

Therefore, an object of the present invention is to provide a rice cooker in which the gasket that seals between the container and the lid has good airtightness.

[Structure of the invention] (Means for solving the problem) In the present invention, a gasket 27 for sealing between the pot 15, which is a container, and the lid 16 is formed into an annular shape by joining both ends of a hollow extruded body 27a. hollow part 34
It has a ventilation hole 35 communicating with the pan 1.
The outer edge 36b of the surface 36 is positioned lower than the inner edge 36a of the surface 36 that comes into close contact with the flange 15b of No. 5.

(Function) With the above structure, when the lid 16 is closed, the annular hollow gasket 27 is expanded in the width direction and comes into close contact with the flange portion 15b so as to wrap around the flange portion 15b, thereby creating a space between the lid 16 and the pot 15. Seal well.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 8, 11 is a container body, and this container body 11 includes an outer case 13 connected by an upper frame 12 having a peripheral wall 12a on the upper surface, and an inner case 13 having a flange portion 14a on the upper edge. Case 1
4, of which a case 14 houses a pot 15, which is a container. Further, a stepped receiving portion 15a is formed around the entire upper portion of the pot 15, and a curved flange portion 15b is formed around the entire upper end. 16 is a lid provided on the upper part of the container body 11 so that it can be opened and closed by a hinge part 17 and can be fixed by a clamp part 18;
A circular lower plate 19 made of a metal such as aluminum is attached to the lower surface of the housing 6 with screws 20, and an upwardly extending protrusion 21 is bent at the periphery of the lower plate 19. Further, a heating element 22 is provided on the upper surface of the lower plate 19. 23 is a steam vent provided in the lid 16. 24 is the lower plate 1
This is a stud protruding from the center lower part of 9, and an inner lid 26 is connected to this stud 24 via a bush 25.
is suspended, and the inner lid 26 is pressed into contact with the receiving portion 15a so that the upper opening of the pot 15 can be elastically closed. Reference numeral 27 denotes an annular packing consisting of a hollow part 28 having a substantially trapezoidal cross-sectional shape and a mounting part 29 having a substantially U-shaped cross-sectional shape and connected inward to the upper part of the inner peripheral surface of the hollow part 28. This gasket 27 has a mounting portion 29 fitted into an annular recess 30 formed on the lower surface of the lid 16, and a protruding portion 21 of the lower plate 19 is press-fitted into the mounting portion 29, thereby attaching the lid 16. and the bottom plate 19. Furthermore, the mounting portion 29 of the packing 27 is
A receiving part 32 having a small annular protrusion 31 on the lower surface is arranged horizontally at the inner end of the housing, and as shown in FIGS. 6 and 7, the receiving part 32
is clamped between the lid 16 and the bottom plate 19, and the small protrusion 31
is in pressure contact with the upper surface of the lower surface plate 19.
The packing 27 is made by cutting a hollow and elongated extrusion molded body 27a of a heat-resistant elastic material such as silicone rubber or fluorocarbon rubber into predetermined dimensions as shown in FIG.
As shown in FIG. 4, this is formed into an annular shape and both ends are joined with an adhesive such as silicone rubber. Further, as shown in FIGS. 4 and 6, a ventilation hole 35 communicating with the cavity 34 is formed in the outer surface of the hollow portion 28 near the joint 33 of the gasket 27, and the gasket 27 has an eighth As shown in the figure, the joint part 33 and the ventilation hole 35 are connected to the clamp part 1.
8 side, and the joint part 33 is located at the center of the clamp part 18. In addition, the packing 27 is formed by joining both ends of an extrusion molded body 27a cut to a predetermined size to form an annular shape.
The surface 36 that is in close contact with the flange portion 15b of the pot 15, which is the lower surface of the pot 8, is closer to the outer edge 3 than the inner edge 36a.
It is formed to be inclined so that 6b is downward.

Then, when the pot 15 is accommodated in the inner case 14 and the lid 16 is closed by the hinge portion 17 and fixed by the clamp portion 18, the pot 15 is closed by the inner lid 26.
is elastically closed, and the surface 36 of the hollow part 28 of the gasket 27 attached to the lid 16 side is closed to the pot 15.
It is pressed into close contact with the curved flange portion 15b of. In this case, the packing 27 has a hollow portion 28, and the surface 36 is wider than the inner edge 36a and the outer edge 36b.
Since the hollow part 2 is tilted downward, the hollow part 2
8 presses against the flange portion 15b, the hollow portion 28 is expanded in the width direction as shown in FIG. As a result, the space between the lid 16 and the pot 15 is sealed, and the space between the lid 16 and the pot 15 is well sealed from the atmosphere, preventing steam leakage during rice cooking and improving rice cooking performance. do. In addition, since the gasket 27 is provided with a ventilation hole 35, the outside and the cavity 3
4, the gasket 27 expands due to the heating caused by cooking rice, breaks the weak adhesive part and forms a pinhole, and the air inside the hollow part is pushed out through the pinhole due to internal pressure. Even after the internal pressure drops, the hollow part does not return to the inside, and the internal pressure of the hollow part remains lower than the external pressure, which prevents the hollow part from remaining crushed by the external pressure and losing its elasticity as a packing. Furthermore, since the packing 27 is formed of an extrusion molded product, it can be provided at low cost.

Further, in this embodiment, the joint portion 33 of the packing 27
Since the ventilation hole 35 is arranged on the side of the clamp part 18, the joint part 33 and the ventilation hole 35 are hidden behind the clamp part 18 and are difficult to see from the outside, which is preferable in terms of appearance. Furthermore, when the lid 16 is opened, the ventilation hole 35 is located at the upper part of the lid 16, so that sticky liquid, i.e., a sticky liquid made of rice soup, does not easily enter the cavity 34 through the ventilation hole 35. The ventilation hole 35 can be prevented from being blocked by the sticky substance, and as a result, the ventilation effect can be maintained well to cope with the shrinkage of the gasket 27 due to cooling when the lid 16 is opened.

FIG. 9 shows another embodiment of the present invention, in which the gasket 27 is attached to the lid 16 with the joint 33 disposed on the hinge section 17 side and the ventilation hole 35 disposed on the clamp section 18 side. . Since the ventilation hole 35 is located on the clamp part 18 side, it has the same effect as in the above embodiment, and since the joint part 33 is located on the hinge part 17 side, the adhesive formed on the outer surface of the joint part 33 The pressure force of the packing 27 against the flange portion 15b is increased by the unevenness caused by the
A good sealing state between the lid 16 and the pot 15 on the side of the hinge portion 17 can be achieved.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the cross-sectional shape, dimensions, and material of the hollow part and mounting part of the packing may be selected appropriately.
Further, the number and size of the ventilation holes may be selected as appropriate.

[Effects of the invention] The present invention improves the airtightness of the packing that seals between the container and the lid by forming a packing from an extrusion molded body, which has a hollow part with a surface where the outer edge is located lower than the inner edge. It is possible to provide a rice cooker with good quality.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention,
Figures 1 and 2 are longitudinal cross-sectional views showing the upper part of the rice cooker, Figure 3 is a partially cutaway perspective view of the extruded body forming the packing, and Figure 4 is an annular shape formed using the extruded body. Fig. 5 is a partially cutaway perspective view of the main part of the packing shown in Fig. 4;
Fig. 6 is a partially cutaway perspective view of the main part showing the state in which the protruding part of the bottom plate is press-fitted into the mounting part of the gasket, and Fig. 7 is an enlarged sectional view of the main part showing the sealed state of the gasket when the lid is closed. , Fig. 8 is a front view showing the state in which the gasket is attached to the lid, Fig. 9 is a front view showing another embodiment of the present invention, and Fig. 10 is an enlarged view of the main part showing the sealed state of the gasket of the conventional example. FIG. 11... device body, 14... inner case, 15...
Pot (container), 15b...flange part, 16...lid,
27...Packkin, 27a...Extrusion molded product, 33
...Joint part, 35...Vent hole, 36...Surface, 36
a...inner edge, 36b...outer edge.

Claims (1)

[Scope of utility model registration request] a container body having an inner case for accommodating the container; a lid provided to open and close the container body; and a lid attached to the lid in correspondence with the top opening of the container;
The container is provided with an annular packing that can be tightly attached to a flange formed at the top opening of the container, and the packing is formed into an annular shape by joining both ends of a hollow extrusion molded body, and has a passage communicating with the cavity. 1. A rice cooker having pores and an outer edge of a surface that comes into close contact with the flange portion, the outer edge being located below the inner edge.