JPS6312614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker having a pressure increasing structure that increases the pressure inside the pot in order to cook delicious rice.

Conventional configurations and their problems In recent years, there has been a lot of research into ways to cook delicious rice using rice cookers. In order to achieve the same effect as accumulating steam and increasing the pressure inside the pot, rice cookers have begun to utilize a pressure increasing structure that accumulates steam within the pot.

Hereinafter, the conventional rice cooker as described above will be explained with reference to the drawings.

1 to 3 show a pressure increasing structure attached to a lid of a conventional rice cooker that covers the upper opening of a bottomed cylindrical pot housed in the main body.

In Figures 1 to 3, 1 is the lid of the rice cooker, 1a is a rectangular discharge hole made in the lid 1 for discharging steam, and 2 is a weight slidably inserted into the discharge hole 1a. The discharge hole 1a is closed.

The operation of the pressure increasing structure of the rice cooker configured as above will be explained below. When the pot 3 housed in the main body of the rice cooker is heated, the temperature of the rice and water inside rises, and when steam is generated, the lid 1 that covers the upper opening of the pot 3 blocks the discharge of steam. As a result, the pressure inside the pot 3 increases. In order to discharge the steam while keeping this pressure constant, the operations shown in FIGS. 2 and 3 are repeated.

That is, when the pressure of the steam in the pot 3 increases, an upward force is applied to the weight 2, causing the weight 2 to move upward in the direction of the arrow 4. Then, the state as shown in Fig. 3 is reached, and the steam is discharged from the weight discharge port 2a formed in the lower side of the weight 2 to the upper part of the lid 1 as shown by the arrow 5, the pressure decreases, and the weight 2 descends.
The state returns to the state shown in Figure 2 again. Therefore, the second
This results in repeated vertical movements as shown by arrow 4 in the figure.

However, in the above configuration, the lid 1 is generally made of sheet metal, and the part that is thin and guides the vertical movement of the weight 2 is a rectangular discharge hole 1a.
The edge is flat, and the discharge hole 1a must be made even slightly larger than the weight 2, and the upper part of the weight 2 must be larger than the discharge hole 1a, so the center of gravity is relatively upper. There is. Therefore, as shown by the chain line in Fig. 3, the weight 2 becomes tilted to a large extent and its operation becomes unstable, and when the steam pressure inside the pot 3 rises rapidly in the tilted state, the operating force applied to the weight 2 increases upward. Instead, the weight is in the direction of arrow 6, and may be fixed at a fixed position, causing problems such as steam being discharged from a location other than the predetermined weight discharge port 2a.

In addition, even when the weight 2 is moving up and down normally, the weight discharge port 2a is closed or opened, so that moisture attached to the weight is removed from the weight discharge port 2a.
Create bubbles like when making soap bubbles using a. For this reason, if this weight 2 is attached to the top surface of the lid 1, not only will a large amount of bubbles be generated on the lid 1, but it will also burst due to the force of the steam discharged from the inside, and the droplets will stain the floor outside the appliance. Become. To do this, it is necessary to provide an inner lid on the underside of the lid and attach the weight shown in the conventional example to this, but if this is done, the operation of the weight cannot be seen from the outside, and the product loses its appeal. It had the following drawbacks.

OBJECTS OF THE INVENTION In view of the above drawbacks, the present invention provides a rice cooker that cooks rice by increasing the pressure inside the pot, which operates stably and does not stain the outside of the appliance.

Composition of the Invention To achieve this object, the rice cooker of the present invention includes a main body that houses a pot, an outer cover that covers the upper opening of the pot, and a weight slide guide hole and a weight guide hole formed in the outer cover. and a weight having the slide part inserted into the weight slide guide hole and the lower slide part fitted into the weight guide hole, and which opens and closes the steam exhaust port. It is becoming.

With this structure, the weight repeatedly moves up and down in order to keep the pressure inside the pot constant, and the weight moves into the upper and lower guide holes, which have a double structure with the steam outlet of the outer lid. The steam outlet on the outer cover has a double structure, and the valve seat is formed by the lower outlet and the ring on the lower sliding part of the weight. As a result, bubbles such as soap bubbles generated here do not directly reach the top surface of the outer lid, and only steam is discharged from the upper exhaust port, preventing droplets from splashing outside the container.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 shows the configuration of a rice cooker that also serves as heat insulation in one embodiment of the present invention.

In FIG. 4, 10 is a main body with a double structure, and 11 is a bottomed cylindrical pot housed in the main body 10. Reference numeral 12 denotes an outer lid with a double structure, in which a steam exhaust port 13 with a double structure is provided in a part thereof, and a rubber-like elastic gasket 14 is provided on the outer periphery of the lower surface. The upper opening of the pot 11 is sealed by being brought into pressure contact with the flange portion of the upper portion of the pot 11. 15 is hole 1 in the outer flange part
5a, and a shaft 1 at the center of the lower surface of the outer lid 12.
6 via a holder 17, and is adapted to be interlocked with the outer lid 12. Although not shown in the drawings, the outer lid 12 is connected to the main body by a hinge shaft, and the upper part of the main body is locked by a lid lever when closed. Reference numeral 18 denotes a weight for increasing the internal pressure of the instrument to a certain degree.

FIG. 5 is a cross-sectional view showing details of the weight 18. In FIG. 5, 18a is an upper slide portion projecting upward, 18b is a lower slide portion,
A flexible ring 19 made of silicone rubber, for example, is fixed to the upper part of the lower slide part 18b, and the ring 19 has a cylindrical shape with an opening at the bottom, and a communication port 18c is provided at the lower part of the ring 19.

FIG. 6 is a sectional view showing details of the steam outlet 13 into which the weight 18 shown in FIG. 5 is press-fitted.

In FIG. 6, a steam plate 21 fixed to the outer lid 12 via a rubber-like cylindrical gasket 20 is provided with a discharge port 21a on its outer periphery, and has an upper slide portion 18a of a weight 18 guided in its center. , a weight slide guide hole 21b is provided. 2
Reference numeral 2 designates a heat dissipation plate constituting the lower surface of the outer lid 12, and is provided with a weight guide hole 22a for guiding the lower slide portion 18b of the weight 18. In this way, the steam exhaust port 13 has a double structure as a whole.

The upper slide portion 18a has a slightly smaller diameter than the weight slide guide hole 21b, and the lower slide portion 18b has a diameter slightly smaller than that of the weight slide guide hole 22a.
The ring 19 is formed to have a slightly larger diameter than the weight guide hole 22a.

The operation of the pressure increasing structure configured as above will be explained below. As shown in Figure 4,
The pot 11 housed in the main body 10 is heated by a heater provided at the bottom of the main body (not shown in the drawing), and the water and rice placed in the pot 11 are heated to generate steam. The generated steam is removed from the inner lid 15.
The steam is introduced into the upper part from the hole 15a around it as shown by the arrow 23, and is sealed with the pot 11 by the double structure outer lid 12 and the elastic packing 14 on the lower surface of the lid to restrict the discharge of steam to the outside of the appliance. This creates steam pressure and increases the pressure inside the pot.

When the pressure inside the pot increases, the weight 18 is lifted to the position shown by the chain line in FIG. As the ring 19 moves upward from the valve seat, which is made up of the ring 19 and the weight guide hole 22a, steam flows through the communication port 18c from the double-structured steam outlet interior 13a to the outlet 21a of the steam plate 21. The weight 18 is ejected out of the device through the body, and the weight 18 descends downward again. This operation will be repeated when steam is generated, and the weight 18 will move in the direction of arrow 2 in Fig. 6.
This results in a vertical movement as shown in step 3.

In addition, the bubbles generated due to the discharge of steam can be removed from the inside of the steam exhaust port 13 which has a double structure of the outer lid 12.
3a, but due to the discharged steam, the bubbles burst inside the steam outlet 13a and the steam plate 21
Only steam is discharged from the discharge port 21a.

As described above, according to this embodiment, by using the weight 18 set in the steam outlet 13 of the outer lid 12 having a double structure, it is possible to keep the pressure inside the pot constant and to control the pressure increase stably, and the control state It is possible to visually observe the vertical movement of the weight that indicates this from the exterior of the outer lid, and it is also possible to prevent the generation of droplets to the outside of the instrument due to bubbles generated when steam is discharged.

Effects of the Invention As described above, the present invention has a double structure for the steam discharge part of the outer lid, each of which is provided with a guide hole for a weight that controls the pressure inside the pot, and the weight is inserted into the guide hole. By being composed of an upper slide part and a lower slide part that pass through the device, it is possible to move the weight up and down in a stable manner, thereby achieving a stable internal pressure increase structure, and at the same time preventing dirt such as splashes from entering the outside of the device. The weights can be easily removed from the outer cover and washed, making them easy to use, and the effects are great.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the weight section of a conventional rice cooker, FIGS. 2 and 3 are sectional views showing the operation of the weight section, and FIG. 4 is a rice cooker according to an embodiment of the present invention. FIG. 5 is an enlarged sectional view of the weight, and FIG. 6 is an enlarged sectional view of the weight. 10... Main body, 11... Pot, 12... Outer lid, 1
3... Steam exhaust port, 18... Weight, 18a...
Upper slide part, 18b...Lower slide part, 1
9...Ring, 21b...Weight slide guide hole, 22a...Weight guide hole.

Claims (1)

[Scope of Claims] 1. A main body that houses a pot, an outer lid that covers the upper opening of the pot, a steam outlet having a weight slide guide hole and a weight guide hole formed in the outer cover, and the weight A rice cooker comprising a weight that opens and closes the steam exhaust port, the rice cooker having an upper slide part inserted into the slide guide hole and a lower slide part fitted into the weight guide hole. 2. The rice cooker according to claim 1, wherein the lower sliding portion of the weight is fitted into the guide hole via a flexible ring.