JPS5934410Y2 - pressure cooker - Google Patents

Description

[Detailed description of the invention] This invention relates to a pressure cooker in which the opening of the pot is sealed with a lid via an annular backing, and cooking is performed in a sealed state.
In particular, the present invention relates to a structure for preventing negative internal pressure due to liquefaction of internal water vapor after heating and cooking.

The embodiment of the present invention shown in the drawings will be explained in detail below.

First, in the embodiments shown in FIGS. 1 and 2, 1 is the handle 2.
A plurality of outward locking claws 3 are formed at appropriate intervals in the circumferential direction on the upper periphery.

Reference numeral 4 denotes a lid equipped with a pressure regulating valve, etc., and a plurality of inward locking claws 5 are formed on the periphery at appropriate intervals in the circumferential direction. engage the locking claws 3 and 5 of.

6 is an annular main body part 7 interposed between the pot 1 and the lid 4, an upper tongue part 8 that is on the inner periphery of the main body part 7 and curves upward, and a lower tongue part 6 that is on the inner periphery of the main body part 7. The annular backing is made up of a lower tongue portion 9 which is curved in a direction, and the upper and lower tongue portions 8 and 9 are brought into close contact with the inner surface of the lid 4 and the inner surface of the pot 1, respectively, by receiving internal pressure.

Therefore, the thickness B of the main body portion 7 is set to be smaller than the distance A formed between the pot 1 and the lid 4 when the upper surface of the locking claw 5 engages and contacts the lower surface of the locking claw 3. Due to the dimensional difference, there are gaps c and c' between the main body part 7, the pot 1, and the lid 4.

10 is the gap c, c' (dimensional difference between gap A and thickness B)
This is a movement restricting part that restricts the movement of the lid 4 due to the movement of the lid 4, and is provided protruding from the top surface of the handle 2, and when it comes into contact with the locking pawl 5, the amount of movement of the lid 4 is determined by the dimensional difference between the distance A and the thickness B. Set it to a small range.

That is, the dimensional relationship of each part is D<A-B=C+C'.

The present invention has the above configuration, and when the gold tin 1 and the lid 4 are rotated relative to each other to engage each other's locking claws 3 and 5 to start cooking,
As the internal pressure increases, the lid 4 rises and the locking claws 3 and 5 come into contact with each other, while the upper and lower tongue portions 8 and 9 of the annular backing 6 receive internal pressure, causing the lid 4, They are brought into close contact with the inner surface of the pot 1, respectively, and seal the gap between the pot 1 and the lid 4 (as shown in the first diagram).

Thereafter, predetermined cooking is performed in such a closed state.

After cooking, when the temperature drops due to leaving the container in a sealed state, the internal pressure also decreases due to liquefaction of the internal water vapor, and the lid 4 eventually descends or moves due to the relationship between the internal pressure and the external pressure.

However, as shown in FIG.
This prevents the upper and lower surfaces of the main body portion 7 from moving to the position where they come into close contact with the pot 1 and the lid 4, respectively.

Therefore, the main body 7 of the annular backing 6 and the pot 1 or the lid 4
There is a gap between the lid 4 and the lid 4, allowing outside air to flow into the interior, and even if the internal water vapor continues to liquefy, the internal pressure will not become negative and the lid 4 can be opened easily. can.

Generally, both upper and lower surfaces of the main body 7 of the annular backing 6 are connected to the pot 1.
If the lid 4 is in close contact with the lid 4 and the internal water vapor liquefies while the lid is in a sealed state, there is a risk that the internal pressure will drop to a pressure lower than the external pressure (negative pressure). In some cases, the lid 4 cannot be opened easily, and the lid cannot be opened easily until the internal pressure and external pressure are equalized by operating a pressure regulating valve or the like. According to the present invention, the lid can be easily opened without operating the valve.

FIG. 3 shows another embodiment of the present invention, in which a movement restricting portion 10' is directly provided on the outer surface of the pot 1, and the same effects as in the above-mentioned embodiment can be achieved.

As described above, in the pressure cooker according to the present invention, even if the pressure cooker is left in a closed state after cooking, the internal pressure does not become negative due to liquefaction of internal steam, and the lid can be easily closed without operating valves etc. It is practically useful because it can be opened to the outside, and it is extremely simple in structure without providing a special valve device for preventing negative pressure or adopting a special structure.

[Brief explanation of the drawing]

1 and 2 are sectional views of main parts showing different states of one embodiment of the pressure cooker of the present invention, and FIG. 3 is a sectional view of main parts showing another embodiment of the same. 1: Pot, 3: Locking claw, 4: Lid, 5: Locking claw, 6: Annular backing, 7 Double body part, 8: Upper tongue piece part, 10.10':
Movement Regulation Department.

Claims (1)

[Scope of utility model registration request] A pot having locking claws on the periphery, a lid having locking claws on the periphery and engaging each other by rotating relative to the pot, and an annular lid interposed between the pot and the lid. It has a main body and an annular backing consisting of upper and lower tongue pieces that are placed on the inner periphery of the main body and are in close contact with the lid and the inner surface of the pot when subjected to internal pressure. In the case where the gap hole between the pot and the lid is set to be larger than the thickness B of the main body part at the time of joint abutment with the locking pawl, there is a gap hole between the lid and the lid due to the dimensional difference between the gap hole and the thickness B on the chain side. A pressure cooker characterized by being provided with a movement regulating part that regulates movement within a range smaller than the dimensional difference.