JPH0337540Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application and overview of the invention) The present invention relates to a lid structure for a rice cooker, and in particular to a pressure regulating device that maintains the pressure inside the rice cooker constant and discharges steam to the outside. By incorporating the pressure regulating device into the entire lid, each part of the pressure regulating device can be easily cleaned.

(Prior art and its problems) As the above-mentioned pressure regulating device, the above-mentioned pressure regulating device has already been developed
There is a device disclosed in Japanese Patent No. 137420, and this conventional device employs a configuration as shown in FIG.

According to this, a flat empty space 1 is located around the inner lid 1.
0 and a plurality of large openings 1 in its peripheral wall.
3 and 13, and a small hole 12 is formed in the center of the bottom.
Further, this empty space is communicated with a cylindrical body 20 provided through the outer cover 2, and the pressure regulating valve 3 is inserted into this cylindrical part.

In this conventional method, during rice cooking, a mixture of rice and steam enters the cavity 10 from the opening 13, and is separated into rice and steam in this cavity 10, and the rice and steam are separated into rice and steam. Return to the rice cooker 4 through the hole 12,
The steam passes through the cylindrical body 20 and is discharged to the outside.
Further, the inside of this cylinder 20 is shut off by the pressure regulating valve 3, and the closing force is applied by the pressure regulating valve's own weight, so the steam discharge pressure is set to a constant pressure by this valve closing force. Therefore, the pressure inside the rice cooker 4 is maintained at a constant level.

However, in this conventional device, the cavity 10 provided in the inner lid 1 and the outside of the outer lid 2 are communicated with each other by the above-mentioned cylinder 20, so that the inner lid 1 and the outer lid 2 are connected to each other. become integrally connected,
There was a problem that cleaning the inner lid 1 was troublesome.

In addition, since the cavity 10 is provided on the inner surface of the inner lid 1, the cavity 10 for separating the slime and steam must be small, and this cavity is also difficult to clean and wasteful. If the cleaning is not done thoroughly, some of the sticky substance may remain in the empty chamber and block the small hole 12.
This caused a problem in that the separation of slime and steam was insufficient.

These problems arise because the inner lid 1 and the outer lid 2 are connected integrally and the pressure regulating device is fixedly provided at the connecting portion.

(Technical Problem) The present invention provides a pressure regulating valve 3 on the lid of a rice cooker, forms a cavity 10 on the upstream side of the pressure regulating valve 3 for separating slime and steam, and separates the steam from steam. is discharged to the outside of the lid via the pressure regulating valve 3, and in order to facilitate cleaning of the inner and outer lids, the inner lid can be easily attached and removed from the outer lid,
Moreover, the technical problem is to make the space between the outer cover 2 and the inner cover the above-mentioned space.

(Means) The technical means of the present invention for solving the above-mentioned technical problem is to make a cylindrical part 21 protrude downward from the center of the outer cover 2, and to provide a cylindrical shaft 22 at the bottom center of the lower end of the cylindrical part. A cap 24 having openings 23, 23 in the peripheral wall is removably fitted, and the lower end outer periphery of the cylindrical shaft is made into an enlarged diameter part 25, and the upper end inner periphery is made into a reduced diameter part 26, and the cylindrical part A shaft portion 31 is made to protrude downward from the lower surface of the pressure regulating valve 3 that closes the upper end opening of the shaft portion 21, and a head portion 32 formed at the lower end of the shaft portion is removably press-fitted and loosely fitted into the upper portion of the cylindrical shaft 22. A holding hole 14 is formed in the center of the inner lid 1, which has openings 13, 13 facing inward at the periphery and is lowered at the center, and a holding hole 14 is provided with a tension packing 5, and the lower end of the cylindrical shaft is inserted into this holding hole. When the outer lid 2 and the inner lid 1 are placed on the rice cooker, the peripheral edges of the outer lid 2 and the inner lid 1 are shaped so that the empty space between these two lids becomes the empty space 10. A small hole 15 is formed in the lowest part of the inner lid 2 so as to make them close together.
was formed.

(Operation) The above technical means of the present invention operates as follows.

The steam generated in the rice cooker 4 is removed from the inner lid 1.
Outer lid 2 and inner lid 1
The rice reaches the cavity formed by the steam, where it is separated into rice and steam, and the rice collects in the central lower part 16 and flows down into the rice cooker 4 through the small hole 15. On the other hand, the steam reaches the inside of the cylindrical part 21 from the mouth part 23 of the cap 24 and pushes up the pressure regulating valve 3. Since the shaft portion 31 of this pressure regulating valve is loosely fitted to the cylindrical shaft 22, this pressure regulating valve will open when a pressing force commensurate with the load of this pressure regulating valve is applied.
The inside of the rice cooker 4 is maintained at a predetermined pressurized state.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

Since the space between the inner lid 1 and the outer lid 2 becomes a cavity for separating the sticky liquid and steam, there is no need to separately form this cavity as in the conventional case, and the structure can be simplified accordingly. In addition, since the inner lid 1 and the outer lid 2 are removably connected only through the cylindrical shaft 22, the inner lid 1 can be completely washed by removing it, and the inner lid, which is most likely to have sticky residue, can be washed. Cleaning becomes easy.

Furthermore, since the pressure regulating valve 3 and the cap 24, which perform the pressure regulating function, are removable, it is easy to clean these parts, and it is possible to prevent deterioration of the pressure regulating performance due to poor cleaning.

(Example) Hereinafter, an example of the present invention will be described based on FIG. 10.

The lid part of this embodiment is the main body case 6 of the rice cooker.
It is attached in a single-opening manner to the upper end of the outer lid 2.
An arm protruding from one side is pivotally supported on the upper part of the main body case 6, and the opposite side corresponds to an engaged part provided on the upper part of the main body case 6 by a hook provided on the outer cover 2,
With the lid closed, the hook engages with the engaged portion, and the outer lid 2 is locked in the closed state.

The outer lid 2 is an injection molded product, and a cylindrical portion 21 projecting downward from the center is integrally molded with the outer lid 2.
Further, a gasket 28 is provided at the lower end of the hanging piece 27 provided on the outer periphery of the outer lid 2, and when the lid is closed, this gasket comes into contact with the entire periphery of the inner lid 1. As a result, the peripheral edges of the inner lid 1 and the outer lid 2 come into close contact with each other.

Next, the cap 24, which has openings 23, 23 formed on the peripheral wall, and the cylindrical part 21 are removably fitted together using a screw fitting structure, and as a result, the outer lid 2 and the cap 24 are integrated. Ru.

Further, in this embodiment, the cylindrical shaft 22 protrudes both upward and downward from the bottom of the cap 24, and the shaft portion 31 of the pressure regulating valve 3 is forcibly fitted into the upwardly protruding portion of the cylindrical shaft. Ru. The length of this shaft portion is set to a predetermined value, and in this forcibly fitted state, there is a predetermined distance between the head 32 and the reduced diameter portion 26 at the upper end of the cylinder shaft 22. The pressure regulating valve 3 moves up and down by a stroke corresponding to the interval.

Next, the inner lid 1 has an elastic packing 5 equipped with an upwardly projecting cylindrical elastic tongue piece 51 in the central holding hole 15, and the enlarged diameter portion 25 at the lower end of the cylindrical shaft 22 is attached to this elastic packing 5. When the elastic packing is penetrated, the inner lid 1 and the cylindrical shaft 22 are connected in a manner that prevents them from coming off, and the elastic tongue piece 51 comes into contact with the bottom of the cap 24. Therefore, even when the lid is open, the cylinder shaft 2
2 and the inner lid 1 can be connected without any play.

Next, an annular groove 16 is formed on the outer periphery of the portion of the inner lid 1 where the elastic packing 5 is attached, and this becomes the lowest part of the inner lid 1, and a small hole 15 is formed at the bottom of this groove. The outer circumferential side of this groove is a slope rising toward the outer circumference, and openings 13, 13 are formed near the periphery of this slope.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the embodiment of the present invention, and Fig. 2 is an explanatory view of the conventional example.
Vacant chamber, 13...Opening, 2...Outer lid, 21...Cylinder part, 22...Cylinder shaft, 25...Enlarged diameter part, 3...Pressure regulating valve, 31...Shaft part.

Claims (1)

[Scope of utility model registration request] A pressure regulating valve 3 is provided on the lid of the rice cooker, and a cavity 10 is formed upstream of the pressure regulating valve 3 to separate slime and steam, and the steam is discharged to the outside of the lid via the pressure regulating valve 3. In the case where the outer lid 2
A cylindrical portion 21 is made to protrude downward from the center of the cylindrical portion, and a cap 24 having a cylindrical shaft 22 at the center of the bottom and openings 23 in the peripheral wall is removably fitted to the lower end of the cylindrical portion. The outer periphery of the lower end of the cylindrical shaft is an enlarged diameter part 25, the inner periphery of the upper end is a reduced diameter part 26, and the shaft part 31 is made to protrude downward from the lower surface of the pressure regulating valve 3 that closes the upper end opening of the cylindrical part 21. A head 32 formed at the lower end of this shaft is removably press-fitted into the upper part of the cylinder shaft 22, and an inner lid 1 is provided with openings 13, 13 facing inward at the periphery and lowered at the center.
A holding hole 14 is formed in the center of the rice cooker with a tension packing 5 attached thereto, and the lower end of the cylindrical shaft is press-fitted into this holding hole. This rice cooker has the peripheral edges of the outer lid 2 and the inner lid 1 brought into close contact with each other so that the empty space between the two lids becomes the empty space 10, and a small hole 15 is formed in the lowest part of the inner lid 2. Pressure regulating device.