JPH0516985Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to improving the sealing performance of the steam vent section of a rice cooker.

[Conventional technology]

A conventional rice cooker will be explained with reference to FIGS. 4 to 8.

In the figure, 1 is a rice cooker main case, 2 is an inner pot detachably housed in the rice cooker main case 1, and 3 is a lid body that opens and closes the top opening of the inner pot 2, which includes an outer lid 4 and an inner pot. It has a double structure with the lid 5. This outer cover 4 is formed by an outer cover 4a and an inner cover 4b, and is provided with a lever 6, a heat insulating material 7, and an operation board 8 inside. Reference numeral 9 designates a steam vent hole that penetrates the outer cover 4a and inner cover 4b, and 10 designates a steam vent valve that is detachably provided in the steam vent hole 9. The steam vent valve 10 has a small hole on its upper surface. It consists of an upper cylinder 11 and a lower cylinder 13 having a valve 12, and the upper cylinder 11 and the lower cylinder 13 are detachably connected. 14 is a knob protruding from the lower surface of the lower cylinder 13, 15 is a heat sink fixed to the inner cover 4b with screws 16, and the surface facing the steam vent hole 9 is provided with an opening 15a. 17 is the lid heater,
A thermistor 18 is bonded to the inner surface of the heat sink 5 with aluminum tape. Reference numeral 19 indicates a disk portion of the lower cylinder 13 which is connected to the upper cylinder 11 by contacting the opening end of the opening 15a, and 20 is a disk portion of the lower cylinder 13 which is pressed to the inner cover 4b by the entire circumference of the end 15b of the heat dissipation plate 15 and is curved to the outside thereof. This is a gasket in which a portion 21 is provided and the lid body 3 is brought into pressure contact with the open end of the inner pot 2 when closed. The steam vent hole packing 23 is integrally molded. This steam vent hole gasket 23 has a convex portion 24 on the surface on the heat sink 15 side.
The convex portion 24 presses against the heat sink 15 to prevent steam from entering. Screw receiving bosses 25 are provided on both sides of the steam vent hole 9 and at four other locations, and receive the screws 16 with the gasket 20 and the heat sink 15 sandwiched therebetween. 26 is a protruding pin provided at the center of the lower surface of the heat sink 15, and the inner lid packing 2
An inner lid 5 with a numeral 7 provided in the center is provided in a removable manner. 28 is a small hole formed in the inner lid 5. Arrows indicate steam flow.

The conventional rice cooker is constructed as described above, and when rice is cooked with the lid 3 closed, the water in the inner pot 2 turns into steam and tries to escape to the outside air. At this time, the inner pot 2 and outer lid 4 are in close contact with each other due to the curved portion 21 of the gasket 20, and the heat sink 15 and outer lid 4 are in close contact with each other due to the convex portion 24, so steam passes through the steam vent valve 10. It escapes to the outside air.

[The problem that the idea aims to solve]

In the conventional rice cooker as mentioned above, the heat sink 1
5 to the inner cover 4b with the screws 16, tighten the screws on the left and right sides of the steam vent hole 9.
However, the heat dissipation plate 15 may bend downward and create a gap, so the lower cylinder 13 of the steam vent valve 10 is fitted into the upper cylinder 11 as shown in FIG. When mating, the disk part 18 pushes up the heat sink 15 to correct the deflection, but when the lower cylinder 13 is not attached or is not installed properly, or when the screws of the heat sink 15 are not tightened properly. As shown in FIG. 6, the convex part 24 of the gasket 19 provided between the heat sink 15 and the inner cover 4b is separated from the heat sink 15, and steam enters from here and the electricity inside the outer cover 4 is This adversely affected the components such as the operation board 8, lid heater 17, and thermistor 18. In addition, as shown in FIG.
Lip part 2 whose part that contacts 5 is lip-shaped
There is also a method of providing a curvature of the heat dissipation plate 9 to accommodate the dimensional deviation caused by the bending of the heat dissipation plate 15, but since the lip portion 29 is constantly pressed, the lip portion 2
There was a problem that 9 easily deteriorated and ceased to perform its function after long-term use.

This idea was made to solve this problem, and even if the fitting between the heat sink and the lid is loose, it can be sealed normally and for a long time, and the electrical parts installed inside the outer lid can be heated by steam. The purpose is to obtain a more protective patchkin.

[Means to solve the problem]

The rice cooker according to this invention includes a rice cooker body case,
An outer lid that opens and closes the top opening of the rice cooker main case, an electrical component provided on the outer lid, a steam vent hole that passes through the outer lid in the vertical direction, and a steam vent hole provided on the bottom surface of the outer lid. a heat dissipation plate having an opening at a position opposite to the heat dissipation plate; a gasket provided between at least the lower end of the steam vent hole and the inner surface of the opening of the heat dissipation plate; Legs that come into contact with the inner surface of the opening of the heat sink and separate from the heat sink when the heat sink is loose, and are longer and more elastic than the legs on the lower surface of the packing, and are longer than the legs and have more elasticity when the heat sink is in a relaxed state. The heat sink is provided with a lip portion that comes into contact with the inner surface of the opening of the heat sink even when the heat sink is in a loosened state.

[Effect]

In this device, in a normal state, the legs and the lip contact the inner surface of the opening of the heat sink, and when the heat sink is loose, the lip comes into contact even if the legs are separated from the inner surface of the heat sink. This prevents steam from entering the outer lid.

〔Example〕

An embodiment of this invention will be explained with reference to FIGS. 1 to 3.

In the figure, 1 to 19, 22, and 25 to 28 are the same as conventional rice cookers. 30 is a heat sink 15
A large ring-shaped first packing part 31 having a curved cross section and a large ring shape is pressed to the inner cover 4b by the entire circumference of the end 15b, and the lid body 3 is brought into pressure contact with the open end of the inner pot 2 when the lid body 3 is closed. Lower end 22 of hole 9
and a small ring-shaped second packing part 32 disposed between the inner surface of the open end of the heat sink 15, and the second packing part 32 has an H-shaped cross section. and the upper recess 33
The lower end 22 of the steam vent hole 9 is placed in close contact with the lower recess 34 , and the open end of the opening 17 of the heat sink 15 is placed close to the steam vent valve 10 side, and the upper end thereof is placed in the lower recess 34 . It is arranged so as to be in contact with the bottom surface 34a. Further, a lip-shaped lip portion 35 having more elasticity than the bottom surface of the recess is formed in the lower recess 34, and the tip of this lip portion 35 is pressed against the inner surface of the opening 17 of the heat sink 15. This lip portion 35 is curved in a concave manner with respect to the steam vent valve 10. Also, this lip portion 35
The length of the leg portion 36 is longer than the leg portion 36 which is in perpendicular contact with the inner surface of the heat sink plate 15 and is one leg of the lower recessed portion. Arrows indicate steam flow.

In the rice cooker configured as described above, when rice is cooked with the lid 3 closed, the water in the inner pot 2 turns into steam and tries to escape to the outside air. At this time Patsukin 30
Due to the curved shape of the first packing part 31, the inner pot 2 and the outer lid 4 are in close contact with each other, and as shown in FIG. Since the heat sink 15 and the outer cover 4 are in close contact with each other, steam escapes to the outside air through the steam vent valve 10.

Furthermore, when the lower cylinder 13 is loosened from the upper cylinder 11, the heat sink 15 bends downward as shown in FIG. Since the portion 35 loosens its curvature in response to the loosening, it maintains close contact and can prevent steam from entering the outer lid 4.

In the above embodiment, the first packing part 31 and the second packing part 32 are provided integrally, but they may be provided separately.

Further, in the above embodiment, the lip portion is concave at the base, but it may be widened at the base. Further, although one lip portion is provided in the above embodiment, a plurality of lip portions may be provided.

[Effect of idea]

As explained above, according to this invention, a leg part and a longer elastic lip part are provided on the lower surface of the packing, and in a normal state, the leg part and lip part close the opening of the heat sink. When the heat sink is in contact with the inner surface and the heat sink is loose, the lip is provided so that it will come into contact even if the legs are separated, so the lip will not deteriorate under normal conditions and will continue to function for a long time when the heat sink is loose. This has the effect of more reliably protecting the electrical components installed inside the outer lid from steam.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of a rice cooker showing an embodiment of this invention, Fig. 2 is a sectional view of the gasket in a normal state, Fig. 3 is a sectional view of the gasket with the heat dissipation plate loosened, and Fig. 4 Figure 5 is a sectional view of the main parts of a conventional rice cooker, Figure 5 is a sectional view of the gasket in a normal state, Figure 6 is a cross-sectional view of the gasket with the heat dissipation plate loosened, and Figures 7 and 8 are views of the lid body. The exploded perspective view and FIG. 9 are sectional views of main parts showing another conventional rice cooker. In the figure, 1 is the rice cooker main case, 4 is the outer lid,
8, 17, 18 are electrical parts, 9 is a steam vent hole, 1
5 is a heat sink, 15a is an opening, 22 is a lower end, 30
35 is a lip part, and 36 is a leg part. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A rice cooker body case, an outer lid that opens and closes the top opening of the rice cooker body case, an electrical component provided on this outer lid, a steam vent hole that penetrates the outer lid in the vertical direction, and a steam vent hole provided on the lower surface of the outer lid. , a heat sink having an opening at a position opposite to the steam vent hole, a gasket provided between at least the lower end of the steam vent hole and the inner surface of the opening of the heat sink, and a gasket formed on the lower surface of the gasket. , a leg that comes into contact with the inner surface of the opening of the heat sink in a normal state and separates from the heat sink when the heat sink is loosened, and a leg that is longer and more elastic than the leg on the lower surface of the gasket. 1. A rice cooker comprising a lip portion which is formed in the heat sink and comes into contact with the inner surface of the opening of the heat sink even in a normal state and in a loosened state of the heat sink.