JPS6215203B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention makes it possible to cook delicious rice by controlling the steam generated during rice cooking and releasing it to the outside to regulate the pressure inside the rice bowl and adjust the moisture content. This invention relates to a pressure regulating device for a rice cooker.

This type of device is mainly used for electric heater-type rice cookers, and the rice cooker is housed inside the rice cooker, and the rice cooker lid is pressed against the rice cooker to create a sealed state inside the rice cooker. Then, a steam guide cylinder is attached to the rice bowl lid and exposed to the outside through the through hole of the rice bowl lid, and communicates the inside of the rice bowl with the outside of the rice bowl. is discharged to the outside under certain limits, and the pressure or water content is adjusted. On the other hand, it is convenient for the rice bowl lid to be opened and closed at the same time as the rice bowl lid, such as when scooping out rice. Either the rice cooker lid is detachably supported, or an elastic engagement portion at the center of the rice cooker lid is engaged with the lower end head of a support pin that is vertically disposed at the center of the back surface of the rice cooker lid. Both of these devices have complicated structures, have no commonality in their functions, and have traditionally been provided separately. Therefore, the body of the rice cooker and the lid structure of the rice cooker have become complicated with many parts.
It was not easy to assemble and was expensive. Furthermore, the rice bowl lid has the attachments in two places, which causes inconvenience in handling such as cleaning.

On the other hand, as is known from Japanese Utility Model Publication No. 51-18932, a steam release passage is provided in the knob of the rice bowl lid and the handle of the lid of the rice bowl, and these are communicated with each other when both lids are closed, so that steam can be released during cooking. There are also known devices that have a pressure regulating function by releasing air. But this one is
Although the knobs and handles on the rice bowl lid and the container lid are used as steam release passages, there is no connection between the rice bowl lid and the lid, and the rice bowl lid cannot be used to open and close the lid. Therefore, the above problem has not been resolved.

In order to solve the above-mentioned problems, this invention has a steam guide cylinder on the rice bowl lid of the rice bowl housed in the rice bowl, which releases the steam inside the rice bowl to the outside of the rice bowl to regulate the pressure. The rice bowl lid is fitted into the through hole of the container lid and protrudes so as to release the steam to the outside of the container, and the steam guide tube fitted into the through hole of the container lid is removably held. A rice bowl lid support means is provided for detachably supporting the rice bowl lid on the rice bowl lid.

Due to this structure, the steam guide cylinder of the rice bowl lid cooperates with the through hole of the rice bowl lid to perform a pressure regulating function by releasing the steam inside the rice bowl, and also cooperates with the rice bowl lid supporting means to perform a pressure regulating function. It has a support function that can be attached and detached to the lid of the rice bowl, and also functions as a knob part of the lid of the rice bowl.

To explain the embodiment shown in FIGS. 1 to 4, 1 is a container body, 2 is a lid of the container, 3 is a rice bowl accommodated in the container 1, and 4 is a lid of the rice bowl.
The container lid 2 is provided with a handle 5 on its upper diameter line, one end of the handle 5 is pivotally connected to the container body 1 by a shaft 6 so that it can be opened and closed freely, and a lock lever is pivotally connected to the other end of the handle 5 by a shaft 7. 8 is engaged with a locking portion 9 of the container body 1 by the bias of a spring (not shown) and locked in the closed state. The rice bowl lid 4 is pressed by a packing 10 provided on the back surface of the rice bowl lid 2 and is crimped onto the rice bowl 3, thereby bringing the rice bowl 3 into a sealed state. 11 is a heater inside the container body 1, and 12 is a heater inside the container lid 2.

A steam guide cylinder 13 is provided in the center of the rice cooker lid 4. This cylinder 13 has a shoulder portion 14 as a border, a large-diameter inner projecting portion 15 at the lower portion, and a small-diameter external projecting portion 16 at the upper portion, which extends outward into the central hole 17 of the rice container lid 4. The shoulder portion 14 is applied to the lower surface of the rice bowl lid 4 by passing through the portion 16 from below, and is attached by a rivet 18. The external protruding portion 16 has a through hole 19 formed in the center of the container lid 2 so as to communicate the inside and outside of the container 1.
The steam release part 16a at the upper end projects outside the container body 1 from below. The steam guide tube 13 has the steam release portion 16a slightly protruding upward from the through hole 19, and a through hole 20 is formed in the protruding peripheral wall.
In addition, through holes 22 are provided in the peripheral wall to which a bottom cap 21 that closes the lower end of the rice bowl internal projection part 15 is screwed, and steam is released to the outside through each of the through holes 22, 20. The size of the steam restricts the release of steam and functions as a pressure regulator.

A downward engaging step portion 23 is formed in the middle of the outer circumference of the external protruding portion 16 of the steam guide tube 13, and the through hole 19 of the container lid 2 is connected to the outer cover 24 of the container lid 2, the inner cover 25, and upper and lower cylinders 28 and 29 that connect the heat dissipation plate 26 which is provided on the lower surface of the inner cover 25 and which holds the heater 12 therebetween, and the clamping plate 27, and the cylinders 28 and 29 are screwed together to connect the At the same time, on the inner periphery of the hole 19 formed by them,
A groove 30 is formed by the cylinders 28 and 29 facing each other. A split ring 31, as shown in FIG. The engagement step portion 2
3 to hold the steam guide cylinder 13 and to support the rice bowl lid 4 to be detachably attached to the lid 2 of the rice bowl.

As a result, the rice bowl lid 4 is supported on the container lid 2 simply by fitting the external protruding part 16 into the hole 19, and this work is performed by, for example,
Easy to hold and hold. To remove the rice bowl lid 4 from the bowl lid 2, pull the rice bowl inner protruding part 15 or press the outer protruding part 16 from the outer surface side of the rice bowl lid 2 to remove the above-mentioned engagement. This can be easily done by removing the elastic engagement of the stepped portion 23 with the split ring 31.

In addition, a pressure regulating valve 32 having a shape as shown in FIG. 4 is fitted into the large-diameter rice bowl inner projection part 15 between the opposing part of the shoulder part 14 and the bottom cap 21. . This valve 32 is made of a heat-resistant elastic material such as silicone rubber, and forms a narrow passage 33 leading from the through hole 22 to the external outlet 16, and receives the internal pressure of the rice bowl 3 as shown in the phantom line in FIG. A diameter reduction change occurs in which the diameter becomes smaller, and the lower passage 33 is also communicated from the isolated communication state of the upper passage 33, promoting the passage of steam as the internal pressure of the rice cooker 3 increases, and the through holes 20, 2
More accurate pressure regulation is performed than in the case of only 2. The packing 10 is held between the lower cylinder 29 and the cover 25 with its base fitted into the inner periphery of the heat sink 26 and the clamping plate 27, and the packing 10 and the heat sink A packing 34 sandwiched between the outer periphery of the plate 26 and the inner cover 25 and a packing 35 sandwiched between the inner peripheries of the outer cover 24 and the inner cover 25 connect the heater 12 mounting portion to the inside of the container lid 2. Both rooms are airtight to prevent moisture from entering.

The embodiment shown in FIG.
Among the upper and lower cylinders 28 and 29 forming the 9, the lower cylinder 29
An elastic engagement tongue piece 40 is provided on the inner periphery of the steam guide tube 13 and elastically engages with the downward engaging step 23 formed on the outer circumference of the external projecting portion 16 of the steam guide tube 13. It is intended to support the rice bowl lid 4 in a removably attachable manner to the container lid 2. The upper cylinder 28 is provided with a cover part 42 having a through hole 41 at its upper end, and has a through hole 1.
9, and a gap 4 is provided on the outside of the cover part 42.
The cap body valve 44 that covers the rice bowl 3 is attached so as to be movable up and down. Due to the steam pressure corresponding to the pressure, it is moved upward against the spring 45 to open the through hole 41, and separately from the through holes 20 and 22 of the steam guide cylinder 13, more accurate pressure regulation is performed as described above. On the other hand, the cap body valve 44 has a through hole 19 and a through hole 2.
It also serves to prevent dust from entering from the ground.

The bottom cap 21 attached to the lower end of the rice bowl protruding part 15 of the steam guide cylinder 13 is connected to the engagement hole 46 formed in the peripheral wall of the cap 21 through the engagement hole 46 formed in the outer periphery of the rice bowl protruding part 15. It is elastically engaged with the protrusion 47 and detachably attached. As a result, the first
Together with the bottom cap 21 of the illustrated embodiment, it can be removed to facilitate cleaning of the interior of the steam guide tube 13. The shoulder portion 14 in both embodiments is a portion 15 protruding into the rice bowl.
Since the steam entering from the through hole 22 collides with the steam on the way to the outside outlet part 16, the steam that is about to be blown out to the outside along with the steam is separated from the steam and flows into the rice bowl outlet part 15. It remains and is not blown out. Further, in the embodiment shown in FIG. 1, the pressure regulating valve 32 housed in the rice bowl outlet part 15 forms a bent narrow passage 33, thereby increasing the frequency of steam collisions. Excellent ability to prevent blowouts due to separation.

In the embodiment shown in FIGS. 6 and 7, the bottom cap 21 of the steam guide cylinder 13 is formed by recessing the center part of the rice cooker lid 4, and the large diameter lower end is screwed into the inner periphery of the cap 21. Together, they form a rice bowl inner protrusion part 15, and a downward engaging step part 2 is provided on the outer periphery of a small diameter external protrusion part 16 protruding from the shoulder part 14 which is flush with the rice bowl lid 4.
3, and the external protruding portion 16 forms the through hole 1 of the vessel lid 2.
9 and protrudes to the top thereof.
A through hole 20 is provided on the outer periphery of the rice bowl 6a, and a portion 15 is provided inside the rice bowl.
A large-diameter through hole 50 is opened at the bottom of the bottom cap 21, and a pressure regulating valve 51 that closes the through hole 50 to a minimum with its own weight is held by a pair of hook-shaped retainers bent at the edge of the through hole 50. When the notch 56, which is held movably up and down by a piece 52 and is normally positioned by engaging with the holding piece 52, opens the through hole 50 to a minimum, and the valve 51 moves upward due to steam pressure, The through hole 50 is further opened, and the steam is released to the outside while being restricted together with the through hole 20, thereby adjusting the pressure. On the inner periphery of the through hole 19 of the container lid 2, there are upper and lower cylinders 28, 29 that form the through hole 19.
A protruding engagement ridge 54 is formed on the inner periphery of a packing 53 made of silicone rubber or the like sandwiched between the two. downward engaging step part 2
3 engages, the rice bowl lid 4 is connected to the rice bowl lid 2.
It is supported in a removable manner. Note that the packing 34 between the heat sink 26 and the inner cover 25 of the container lid 2 is
It also has the function of pressing the rice bowl lid 4 onto the rice bowl 3. 55 is a single packing that seals between the inner periphery of the heat sink 26 and the lower cylinder 29.

In the embodiment shown in FIGS. 8 and 9, a hemispherical pressure regulating valve 60 made of silicone rubber or the like is provided in the large-diameter rice bowl outlet part 15 of the steam guide tube 13. The pressure valve 60 has its lower end fitted onto the outer periphery of the protrusion 21a at the bottom of the bottom cap 21, and the hemispherical outer surface is connected to the opening edge 61 of the shoulder 14 of the external projecting portion 16.
A plurality of radial grooves 62 are cut on the hemispherical outer surface of the hemispherical surface to be pressed against the opening edge 61 to form a steam passage. Initially, the outer surface of the pressure regulating valve 60 is in pressure contact with the opening edge 61, and steam is released through the groove 62, but as the steam pressure increases, the pressure regulating valve 60 is pushed away from the opening edge 61 as shown in the imaginary line. , expand the steam passage and adjust the pressure. The structure for supporting the rice cooker lid 4 via the steam guide tube 13 is the same as in the embodiment shown in FIG. 1, so the same reference numerals are given and the explanation thereof will be omitted.

In the embodiment shown in FIGS. 10 and 11, the steam guide cylinder 13 has an annular groove 70 formed on the outer periphery of the continuous portion of the external projecting portion 16 to the shoulder portion 14, and the groove 70 is connected to the lid of the rice bowl. It is attached to the rice bowl lid 4 by fitting it to the inner peripheral edge 72 of a packing 71 made of silicone rubber or the like attached to the mouth edge of the center hole 17 of the rice bowl 2. It also has the function of pressing the rice bowl lid 4 against the rice bowl 3 by pressing against the lower surface of the rice bowl. Further, the downward step portion 23 formed on the outer periphery of the externally projecting portion 16 of the steam guide tube 13 is connected to an elastic engaging tongue piece 4 provided on the upper tube 28.
The rice bowl lid 4 is removably supported by the rice bowl lid 2 by being elastically engaged with the rice bowl lid 2. External appearance part 16
A funnel-shaped valve hole 73 is formed in the lower part of the rice bowl by a bottom cap 21 screwed onto the inner periphery of the lower end of the rice bowl inner projection part 15 and an auxiliary ring body 77 sandwiched between the shoulder part 14. The pressure regulating valve 7 is seated in the valve hole 73 by its own weight.
4, a weight 75 is embedded therein, and a groove 76 is formed in the seating surface for the valve hole 73. The valve hole 73 is located between the through holes 20 and 22 of the steam guide cylinder 13, and when the pressure regulating valve 74 is seated, the steam is released through the groove 76 and is pushed upward as the steam pressure increases. Pressure regulation is performed by increasing the opening degree of the valve hole 73. The weight of the pressure regulating valve 74 can be arbitrarily set depending on its material and size, and the weight 75 can also be omitted.

Note that if a through hole 78 is formed at the bottom of the bottom cap 21 as shown by the imaginary line, the oneba separated and remaining in the rice bowl outlet part 15 will naturally flow down into the rice bowl 3. You can put it back.

In the embodiment shown in FIGS. 12 and 13, the steam guide cylinder 13 is divided into two parts, a small-diameter external projecting part 16 and a large-diameter internal projecting part 15, and the external projecting part 16 is divided into two. The lower end is screwed onto the outer periphery of the protruding part 80 on the central upper surface of the rice bowl lid 4, and the rice bowl inner protruding part 15 has a bottom cap 21 having a through hole 22 on the peripheral wall, and a daruma-shaped engagement hole with its flange 82. 83 is formed by being detachably attached to a support pin 84 protruding from the back surface of the rice cooker lid 4, and is formed by attaching it detachably to the support pin 84 protruding from the back surface of the rice cooker lid 4.
In order to regulate the pressure, a through hole 20 is provided on the outer periphery, and a valve hole 85 and a pressure regulating valve 86 which closes the valve hole 85 by its own weight are provided in the top plate portion of the protruding portion 80 of the rice cooker lid 4. A through hole 78 for returning the rice to the rice bowl 3 is also provided at the bottom of the cap 21.
Further, it is provided on the inner periphery of the through hole 19 of the container lid 2, and engages with a downward engaging step portion 23 formed on the outer periphery of the external projecting portion 16 of the steam guide tube 13 to support the rice bowl lid 4. The split ring 31 is fitted into the groove 30 between the upper and lower cylinders 28 and 29, and has an upward fitting wall 88 that fits into a retaining wall 87 vertically installed on the inner periphery of the lower end of the upper cylinder 28. Even if the external projecting portion 16 is pulled out from the through hole 19, the split ring 31 does not easily fall off.

FIG. 14 shows a steam guide cylinder 13 formed as shown in FIG. An auxiliary cylinder 90 that is a double cylinder is provided in the portion 15 and is sandwiched between the shoulder portion 14 and the bottom of the bottom cap 21, and the upper end protrusion 91 of the auxiliary cylinder 90 is connected to the lower end of the external projecting portion 16. A valve hole 92 is fitted into the top plate of the protruding portion 91, and a pressure regulating valve 94 is provided which is always closed by an elastic lip portion 93. A slit 95 cut from the lower end is formed in the peripheral wall, which makes the steam passage more complicated and improves the steam separation function. Reference numeral 96 indicates a mounting pin of the pressure regulating valve 94. The pressure regulating valve 94 is made of an elastic material such as silicone rubber, and usually releases steam from a through hole 97 formed in a part thereof, and as the steam pressure increases, the lip portion 93 is pushed up as shown in the imaginary line. The valve hole 92 is opened to adjust the pressure.

The embodiment shown in FIG. 15 has a steam guide tube 13 similar to that of FIG. 13, but with a bottom cap 21.
A through hole 22 formed in the peripheral wall of the inner protruding portion 15 of the rice bowl
A lower flange 100 is formed to open the through hole 2.
The oneva that is about to enter with the steam from 2 is returned into the rice bowl 3, and the oneba is returned to the steam guide cylinder 13.
You can prevent it from going inside. In addition, the steam guide tube 13
Inside, there is provided an auxiliary cylinder 101 with a part of its outer circumference screwed to a part of the inner circumference of the external protruding part 16, and its lower end opening is located halfway inside the rice bowl protruding part 15, and the upper end top plate part a valve hole 102 and a pressure regulating valve 1 for opening and closing it;
03, and the pressure regulating valve 103 has a steam discharge part 16a in which the through hole 20 of the steam guide cylinder 13 is provided on the outer periphery.
The spring 104 is applied between the valve hole 1 and the top plate of the valve hole 1.
02 is always closed, and the pressure regulating valve 103 is pushed up against the spring 104 according to the steam pressure, thereby opening the valve hole 102 appropriately and releasing steam according to the steam pressure to regulate the pressure. . The lower end opening of the auxiliary cylinder 101 is located in the rice bowl outlet part 15 and serves as a barrier against which the released steam collides,
Together with the shoulder 14, it serves to separate the oneba.

Note that 105 is a packing provided between the lower cylinder 29 and the inner circumference of the inner cover 25.

The embodiment shown in FIG. 16 and FIG.
As shown in the figure, the bottom cap 2 is integrally formed with the rice bowl lid 4.
The large-diameter lower end of the steam guide cylinder 13 is screwed onto the inner periphery of the rice cooker 1 to form the rice bowl internal discharge part 15, and the upper end steam discharge part 16a of the external discharge part 16 A large through hole 20 is opened in the vessel lid 2.
The upper end of the upper cylinder 28 forming the through hole 19 covers the steam release part 16a and has a horizontal steam release port 11.
A cover portion 111 having a diameter of 0 is formed to prevent dust from entering. A pressure regulating valve 112 made of silicone rubber or the like is fitted into a large diameter through hole 50 provided at the bottom of the bottom cap 21.
is a radial cut 11 from the center as shown in Figure 16.
3, a plurality of elastic tongue pieces 114 are formed, and each tongue piece 114 usually comes together to close the through hole 50, but as steam is generated, each tongue piece 114 moves along the imaginary line according to the pressure. It is pushed up and opened appropriately, releasing steam and regulating the pressure.

Also, as in FIG. 6, the rice bowl lid 4 is supported by elastically engaging with the downwardly facing engagement step 23 formed on the outer periphery of the external projecting portion 16 of the steam guide tube 13.
A packing 115 made of silicone rubber or the like is attached to the inner periphery of the through hole 19 of the container lid 2. The upper and lower cylinders 28, 29 forming the through hole 19 The packing 115 is individually screwed together to sandwich necessary members.
An engagement lip 116 that is sandwiched between the lower cylinder 29 and the inner cover 25 and elastically engages with the engagement step 23, and a rice bowl lid that extends in a U-shape from the through hole 19 to the back surface of the container lid 2. The pressing part 117 has the function of pressing the rice bowl lid 4 against the rice bowl 3, and the end of the pressing part 117 has a pressing part 117 at the bottom of the seam between the lower cylinder 29 and the heat dissipation plate 26. An abutting sealing lip 118 is formed to seal the seam. If the sealing lip 118 is inserted into the seam, the sealing effect of the seam will be improved.

Note that the heat dissipation plate 26 has the tip of a hook-shaped edge wrap 119 formed on its outer periphery elastically engaged with a holding piece 120 formed on the inner cover 25, so that the outer periphery is also firmly held on the inner cover 25. has been done.

The embodiment shown in FIG.
as a thick-walled integrally molded product made of synthetic resin, etc.
The lower end is fitted into the bottom cap 21 formed by recessing the center of the rice bowl lid 4 to form the rice bowl protruding part 15, and the flange 130 applied to the top surface of the rice bowl lid 4 is riveted 18. It is attached by fastening to the rice bowl lid 4, and the upper part from the flange 130 is an external projecting part 16, and the upper end of the steam releasing part 16 is attached.
a projects upward from the through hole 19 of the container lid 2, opens the through hole 20 laterally, and opens the bottom cap 21.
A through hole 78 for returning oneba is provided at the bottom of the rice bowl, and a through hole 22 is provided in the peripheral wall of the outflowing part 15 in the rice bowl, and both outflowing parts 15 and 16 have the same diameter, which is the simplest one. It is.

Although the pressure is regulated only by restricting the passage of the released steam through the through holes 20, 22, and 78, it goes without saying that a pressure regulating valve as described above may be provided. Each hole 2
Although there is no barrier section with which the steam entering from each of the through holes 22, 78 collides, since both the through holes 22, 78 are formed elongated to give straightness to the passing steam and increase its speed, the steam from each through hole 22, 78 is The incoming steam collides with each other within the diameter of its entrance into the steam guide tube 13, and the steam is suddenly released from the small diameter passage into the wide steam guide tube 13, causing a so-called flash phenomenon. Since the hot steam is separated and left in the rice bowl discharge part 15 of the steam guide tube 13, the steam is prevented from blowing out to the outside, and the steam is returned to the rice bowl 3 through the through hole 78.

An annular engagement groove 131 is formed on the outer periphery of the base of the externally projecting portion 16 of the steam guide tube 13, and the vessel lid 2
Of the upper and lower cylinders 28 and 29 that are individually screwed together to the inner cover 25 to form a through hole 19, a packing 132 sandwiched between the lower cylinder 29 and the inner cover is inserted from the through hole 19 to the lower surface of the container lid 2. An annular protrusion 134 that elastically engages with the engagement groove 131 is provided on the inner periphery of the lower end of the rice bowl lid pressing part 133 extending in a U-shape.
4, the rice bowl lid 4 is detachably supported on the container lid 2.

In the embodiment shown in FIGS. 19 and 20, the steam guide cylinder 13 has an inner outlet part 15 and an outer outlet part 1.
6 to the lower surface of the rice bowl lid 4, and the annular groove formed on the outer periphery of the base of the externally protruding portion 16 is fitted into the inner periphery of the center hole 17 of the rice bowl lid 4. It is attached to the rice bowl lid 4, and has a double inner and outer peripheral wall 141,
The inner circumferential wall 141 of the bottom cap 21 with 142
is screwed to the inner periphery of the large diameter lower end below the shoulder 14 of the steam guide tube 13, and a slit-shaped through hole 22 is provided in the peripheral wall 141, so that the outer peripheral wall 142 prevents the steam from entering through the through hole 22. It is arranged to be returned to the container 3. The steam release part 16a is a through hole 19 of the container lid 2.
A through hole 20 is opened laterally in the outer periphery protruding from the periphery. Further, a pressure regulating valve 145 made of silicone rubber or the like is sandwiched between the inner peripheral wall 141 and the shoulder portion 14, and has an elastic tongue piece 144 formed by a notch 143 similar to that in FIG. This pressure regulating valve 1
45 performs the same pressure regulating function as in the case of FIG. 16 at the opening of the external projecting portion 16 to the shoulder portion 14.

An engaging portion 146 with a corrugated cross section that extends upward from the groove 140 is provided on the outer periphery of the externally projecting portion of the steam guide tube 13.
A packing 147 made of silicone rubber or the like is sandwiched between the upper and lower tubes 28 and 29 forming the through hole 19 of the container lid 2, and extends in a U-shape from the through hole 19 to the lower surface of the container lid 2. A cross-sectionally corrugated engaging portion 1 that elastically engages with the engaging portion 146 is provided on the outer periphery of the rice cooker lid pressing portion 148.
The rice bowl lid 4 is detachably supported by the rice bowl lid 4 by the same portion 149.

In FIG. 21, a bottom cap 21 having a large diameter through hole 50 formed at the bottom is screwed onto the outer periphery of the large diameter lower end portion of the steam guide tube 13, which is the same as that in FIG. 15, a through hole 22 is formed in the peripheral wall of the same part 15, and the same pressure regulating valve 14 as described above is inserted into the large diameter through hole 50.
5 is fitted, and the pressure regulating valve 145 is the 15th one.
Similar to the one in the figure, the large-diameter through hole 50 performs the pressure regulating function.

The embodiment shown in FIG. 22 and FIG.
The steam guide tube 13 fitted to the rice cooker lid 4 in the same way as the one in FIG.
The L-shaped groove 161 formed on the inner surface of the circumferential wall of the bottom cap 21 is engaged to form the inner protruding part 15 of the rice cooker to which the cap 21 is attached, and the steam release part 16a at the upper end of the outer protruding part 16 is A pressure regulating valve 1 which has a through hole 20 in the top plate that protrudes above the through hole 19 of the container lid 2, and closes the through hole 20 by its own weight.
62 is provided by fitting an elastic leg 163 vertically divided at several places into a holding hole 164 in the top plate part of the steam discharge part 16a so as to be able to move up and down. The pressure regulating valve 162 has a weight 163 buried therein, which normally closes the through hole 20 due to its own weight, but when steam is generated, it is lifted according to the pressure, and the through hole 20 is opened appropriately to regulate the pressure. A downward engaging stepped portion 23 is formed on the outer periphery of the external projecting portion 16, and a packing 164 made of silicone rubber or the like is sandwiched between the upper and lower cylinders 28 and 29 forming the through hole 19 of the container lid 2.
A protrusion 165 having a U-shaped cross section is formed to elastically engage with the engagement step 23 to support the rice bowl lid 4 to the vessel lid 2. A rice bowl lid pressing part 166 extending in a U-shape to the lower surface of the body lid 2 is provided, and a seal lip 167 at the tip thereof is sandwiched between the outer periphery of the lower cylinder 29 and the heat sink 26 to seal the space between them. There is.

In addition, in all of the above embodiments, the steam guide cylinder 13 has a rice bowl protrusion part 15 that protrudes into the rice bowl 3, but the part 15 does not necessarily have to protrude into the rice bowl 3, Any structure that can receive steam from inside the vessel 3 may be used. In addition, the various holes and pressure regulating valves may be provided in any part, and the structure of the lid 2, its through-hole, and the lid supporting the rice bowl that engages with the steam guide tube may be arbitrary. It goes without saying that the combinations of the partial structures of the embodiments can be mutually changed, and various other modifications are also possible. Further, the pressure regulating structure of the steam guide tube is also arbitrary, and it can be provided at several locations instead of being provided at one location in the center of the rice cooker lid as in the embodiment.

According to this invention, the steam guide cylinder protruding from the rice cooker lid not only has a steam release pressure regulating function by cooperating with the rice cooker lid through hole, but also functions as a knob for the rice cooker lid itself, and also functions as the rice cooker lid through hole. By fitting the rice bowl into the rice bowl and working with the rice bowl lid supporting means, the rice bowl lid can be supported in a manner that is detachable from the lid of the rice bowl.
Supporting the rice bowl cover detachably from the vessel lid for convenience in use is achieved with an extremely simple structure by using the knob portion of the rice bowl lid.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a main part of a rice cooker according to an embodiment; Fig. 2 is an enlarged sectional view of a part thereof;
The figure is a slope view of the split ring, Figure 4 is a slope view of the pressure regulating valve, Figure 5 is a sectional view of the main part of another embodiment, Figure 6 is a sectional view of the main part of yet another embodiment, and Figure 7 is a perspective view of the pressure regulating valve, FIG. 8 is a half-sectional view of the main part of one embodiment, FIG. 9 is a perspective view of the pressure regulating valve, and FIG. 10 is a half-sectional view of the main part of another embodiment. Fig. 11 is a perspective view of the pressure regulating valve, Fig. 12 is a sectional view of the main part of another embodiment, Fig. 13 is a perspective view of the bottom cap, and Fig. 14 is a perspective view of the pressure regulating valve.
Fig. 15 is a sectional view of the main part showing a modification of the one shown in Fig. 12, Fig. 16 is a sectional view of the main part showing another embodiment, and Fig. 17 is a slope view of the pressure regulating valve. 18 and 19 are sectional views of main parts showing modifications of the one shown in FIG. 16, FIG. 20 is a perspective view of the pressure regulating valve of the one shown in FIG. 19, and FIG.
FIG. 22 is a sectional view of the main part showing a further modification of the one in FIG. 9; FIG. 22 is a sectional view of the main part showing another modification;
Figure 3 is a partially slanted view of the bottom cap. 1... vessel body, 2... vessel lid, 3... rice bowl, 4...
...Rice bowl lid, 13...Steam guide tube, 16...External exit part, 16a...Steam release part, 19...Through hole, 2
0, 22, 50, 78...Through hole, 95...Slit, 23...Engagement step, 131...Engagement groove, 1
46...Wave-shaped engaging portion, 31...Split ring, 40
...Engaging tongue piece, 53, 115, 132, 147,
164...Patsuking, 54,134,165...
... Protrusion, 116 ... Engagement lip, 149 ... Waveform engagement part, 32, 51, 60, 74, 86, 94,
103, 112, 145, 162...pressure regulating valve, 4
4...Cap body valve, 41...Through hole, 73, 85, 9
2,102...Valve hole, 10,34,117,13
3,148,166...Patsuking.

Claims (1)

[Scope of Claims] 1. A steam guide cylinder is fitted into a through-hole in the rice bowl lid to regulate the pressure by discharging the steam inside the rice bowl to the outside of the rice bowl, so that the steam can be The rice bowl is provided in a protruding manner so as to release water to the outside of the rice bowl, and the rice bowl lid is removably supported by holding a steam guide cylinder fitted in the through hole of the rice bowl lid in a detachable manner. A pressure regulating device for a rice cooker, characterized in that a lid supporting means is provided. 2. The rice cooker according to claim 1, wherein the rice cooker lid supporting means holds the steam guide cylinder by elastically engaging with an engaging part formed on the outer periphery of the external projecting part of the steam guide cylinder. pressure regulating device. 3. The pressure regulating device for a rice cooker according to claim 2, wherein the support means comprises a split ring loosely fitted into a groove formed in the inner periphery of the through hole of the container lid. 4. The pressure regulating device for a rice cooker according to claim 2, wherein the support means comprises an elastic engagement tongue provided on the inner periphery of the through hole of the container lid. 5. The pressure regulating device for a rice cooker according to claim 2, wherein the support means is an annular packing made of rubber or the like provided on the inner periphery of the through hole of the container lid. 6. The pressure regulating device for a rice cooker according to claim 5, wherein the annular packing serving as the support means is provided with a rice bowl lid pressing portion that presses the rice bowl lid against the rice bowl. 7. The pressure regulating device for a rice cooker according to claim 1, wherein the steam guide cylinder has an appropriately sized through hole that restricts the passage of steam released outside the container. 8. The pressure regulating device for a rice cooker according to claim 7, wherein the through hole is formed at the inner and outer exit portions of the steam guide tube, or in the middle thereof. 9. The pressure regulating device for a rice cooker according to claim 1 or 7, wherein the steam guide cylinder is provided with a pressure regulating valve that automatically changes the passage opening degree of the steam to be released according to the internal pressure of the rice cooker.