JPH0242486B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure cooker in which the fitting and tightening of a pot and a pressure lid constituting the pressure cooker can be operated with a simple structure.

Conventionally, the operation of fitting the pot and the pressure lid requires regulation of the fitting position like a bayonet type fitting, which has disadvantages that the operation is not easy and the structure is complicated and cannot be easily disassembled. In order to eliminate the above-mentioned drawbacks, in the prior art, a fixing metal piece with a lip groove type cross-section and the outer edges of the pot and pressure lid are bent downward and upward to form a hook part, and the lip part and the hook part are fitted together. A structure has been invented that fits the two, but it has the disadvantage that the structure is somewhat complicated.

The present invention aims to eliminate the drawbacks of the prior art and to obtain a pressure cooker with a snap-fitting device of simpler construction.

The present invention will be explained based on the drawings.

In the figure, reference numeral 1 denotes a rice cooking heater in which a heater 1a is cast, and a through hole is provided in the center. 2 is a protective frame with a through hole in the center of the bottom, a rice cooking heater 1 attached to the inner bottom, and a heat retaining heater 3 for keeping warm at the outer top. Reference numeral 4 denotes a center thermostat incorporating a magnet 4a, which is fixed to a through hole in the center of the rice cooker heater 1 and housed in a heat sensitive case 5 that passes through a through hole in the protective frame 2. 6 is a switch lever that is linked to the center thermostat, and a rice cooking button 7 is inserted into the tip. Reference numeral 8 denotes a micro switch, which opens and closes an electric contact portion by the movement of a switch lever 6. Reference numeral 9 denotes an upper frame made of a ring-shaped resin material with a hook part and a hinge part integrally molded on the other side, a protective frame 2 is attached to the upper part of the inner periphery, and a body 10 constituting the outer shell of the main body is fitted to the lower part of the outer periphery. I am making it match. 11 is an insulating material that prevents heat radiation during cooking and keeping rice warm, increasing thermal efficiency. 12 is a display board on which a switch lever 6 and a micro switch 8 are attached.
13 and 14 are a cord reel and legs attached to the lower surface of the body 10. Reference numeral 15 denotes an outer lid made of a resin material with a handle portion integrally molded, and a support portion that fits into the hinge portion of the upper frame 9 is pivotally supported by a hinge shaft 16.
A hook lever 18 to which a hook button 17 is fixed is attached to the other end and is engaged with the hook portion of the upper frame 9 to lock the entire lid body. Reference numeral 19 denotes an outer lid cover for thermally protecting the lower side of the outer lid, and a fitting recess 19a is provided on the inner surface of the lower end as shown in FIG. Reference numeral 20 denotes a heat dissipation plate that constitutes the lower surface of the lid. A lid heater 21 for heat retention is pasted on the upper surface with double-sided tape, a holder gasket 22 is inserted into the through hole in the center, and the outer lid 15 and the heat dissipation plate 20 are connected. It is attached to the outer lid cover 19 via a heat dissipation gasket 23 so that the holder gasket 22 is sandwiched between the heat dissipation gaskets 23 and the holder gasket 22 is held therebetween. 24
is a pot removably placed on rice cooking heater 1,
A hook portion 24a is formed by bending the entire outer circumference of the upper end outer peripheral edge portion downward. 25 is Nabe Patsukin 26
A pressure lid is used to airtightly cover the upper opening of the pot 24 through a pressure lid, and a hook portion 25a is formed by bending the entire outer circumference of the lower end of the pot 24 upward, and a nozzle 27 is attached to the upper surface as shown in FIG. A pressure adjusting weight 28 is detachably set at the tip of the nozzle 27 to adjust the pressure inside the pot 24. Further, a safety device 29, which is a second pressure regulating device, is attached to the center of the pressure lid 25 to prevent the internal pressure from rising abnormally when the pressure regulating weight 28 does not operate due to clogging of the nozzle 27 or the like. As shown in FIG. 1, the upper end of the safety device 29 has a hook portion 29a with a reversely convex cross section that removably engages with the holder gasket 22, and the lower end has a hook portion 29b similar to the upper end. ing. Reference numeral 30 designates an inner lid, which is provided with several small holes on the lower surface of the pressure lid 25 to prevent "sticks" etc. from blowing out from the nozzle 27, and is detachably attached to the hook part 29b at the lower end of the safety device 29. A fitting inner lid gasket 31 is attached to the central through hole, and the outer peripheral wall is supported by the pot gasket 26.

As shown in FIG. 7, reference numeral 32 is an arc-shaped fixing fitting obtained by dividing a ring-shaped cross-section U-shaped fitting into six equal parts in the present invention, and a hook portion 32a with the upper and lower ends of the entrance bent inward. , 32b, and the third
As shown in the figure, a sliding shaft 33 is fixed to protrude from the upper and lower surfaces, and a through hole 32c is provided in the center of the side surface. Reference numeral 34 designates a ring-shaped guide ring, to which a guide plate 34a to be inserted into the opening 32c of the fixture 32 is fixed on the inner surface, and an operating lever 34b having one pressure knob 35 attached to the tip thereof is fixed to the outer surface. ing. Reference numeral 36 designates a ring-shaped lower storage case with an L-shaped cross section, which stores the fixing metal fitting 32 and the guide ring 34, and has an elongated hole 36a at the bottom on which the sliding shaft 33 of the fixing metal fitting 32 slides, inclined toward the center. A fitting recess 36b is provided at the upper end of the side portion, and a fitting protrusion 36c is provided on the outer surface. As shown in FIG. 4, reference numeral 37 is a ring-shaped storage cover with an inverted L-shaped cross section that fits into the upper part of the storage case 36, and has a long hole 37a on the top surface in the same shape as the long hole 36a of the storage case 36 and at a position opposite to the long hole 36a. insert the sliding shaft 33, provide a fitting protrusion 37b on the outer lower end, fit the fitting protrusion 37b into the fitting recess 36b of the storage case 36, and remove the fitting sliding device 3.
8.

The fitting protrusion 36c of the storage case 36 of the metal fitting sliding device 38 is fitted into the fitting recess 19a of the outer lid cover 19, so that it can be detachably attached to the lid. The shape of the fixing bracket 32 is changed by bending the upper and lower surfaces of the fixing bracket 32 inward as shown in FIG. The height of the inner circumferential side is an inclined surface that is lower than the height of the outer circumferential side, and an inclined surface is provided at the outer edge of the pan 124 and the pressure lid 125 so as to closely fit with this inclined surface, and the cross section of the edge Since the inclined surface is bent to form an expanded V-shape, the fixing fitting 132, the pot 124, and the pressure lid 125 can be fitted together.

Next, the movement and function of the metal fitting sliding device 38 will be explained.

As shown in FIG. 6, when the pressure knob 35 is moved in the closing direction, the guide plate 34a of the guide ring 34
guides the fixing fitting 32, and the sliding shaft 33 of the fixing fitting 32 connects the lower surface of the pot 24 or 124 and the pressure lid 25 along the long holes 36a and 37a inclined toward the center, which are provided on both sides of the storage case 36 and the storage cover 37. Alternatively, the fixture 32 or 132 slides to a position where it engages with the edge of the top surface of the fixture 125. Conversely, when the pressure knob 35 is moved in the opening direction, the fixing fitting 32 or 132 moves outward and comes off the edge of the pot 24 or 124 and the pressure lid 25 or 125, so that the pressure can be adjusted only by operating the pressure knob 35. Pot 24 or 124 and pressure lid 25 or 12 constituting the pot
5 can be easily attached and detached.

Next, the operation of the pressure cooker of the present invention will be explained.

As shown in Figure 1, when you press the rice cooking button 7,
In conjunction with the upward movement of the switch lever 6, the magnet 4a in the center thermostat 4 is attracted to the ferrite, the micro switch 8 is turned on, and the rice cooking heater 1 is energized to start cooking rice. The temperature inside the pot 24 rises, and the pot gasket 26 closes the pot 24 and the pressure lid 2.
When the temperature of the pot 24 or 124 rises to 100℃ or more, the pressure lid 25 or 125
The entire body moves upward, and the upper surface of the outer edge of the pressure lid 25 or 125 contacts the hook portion 32a or the end surface 132-1 at the upper end of the fixture 32 or 132, pushing up the fixture 32 or 132, and the fixture 32 or 132 is pushed up.
Alternatively, the hook portion 32b at the lower end of the pot 132 or the upper end surface 132-2 and the lower surface of the outer edge of the pot 24 or 124 or the lower surface of the outer edge of the pot 24 or 124 are fitted in contact with each other.
At this time, from the outer edge of the pot 24, pressure lid 25 or pot 124, pressure lid 125,
Each hook part 24a, 25 so that 2 does not come off.
a, 32a, 32b or the tapered inclined surface portions 132-1, 132-2 of the fixture 132, the pot 12
4. Upper and lower inclined surface portions 124 of the pressure lid 125
-1 and 125-1 are firmly fitted to withstand internal pressure. pot 24 or 12
When the internal pressure reaches the set pressure of the pressure adjusting weight 28, the pressure adjusting weight 28 is pushed up by the internal pressure and steam is released from the nozzle 27 to maintain the internal pressure constant and cook rice.

When rice cooking is complete, the temperature at the bottom of the pot 24 or 124 rises, the magnet 4a in the center thermometer 4 moves away from the ferrite, the switch lever 6 moves downward, and in conjunction with this movement, the micro switch 8 is activated.
It is turned off, and the electricity is switched to the heat retention heater 3 and the lid heater 21 to keep them warm.

As described above, the fitting structure of the present invention is simpler than that of the prior art. Similar to the prior art, fixing metal fittings are attached to the outer edges of the pot and pressure lid that make up the pressure cooker, and can be removably fitted by simply moving the pressure knob, with easy-to-operate hooks that prevent them from coming off, or simply fixed. By providing sloped surfaces on the metal fittings, pot, and pressure lid, the pot and pressure lid can be fitted more reliably, and the engagement will not come loose even when pressurized, so there is no fear of pressure cookers and you can use it with confidence. In addition, since it has a shape that is easy to work harden, the thickness of each part can be made to the best possible thickness without waste, and the structure can be made to withstand processing.Therefore, it can be made into a low-priced product. arise.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a pressure jar rice cooker that can maintain heat for a long time, showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the pressure adjustment weight portion, and Fig. 3 is a cross-sectional view of the lower part of the metal fitting sliding device of the present invention. A perspective view showing the procedure for storing the guide ring and fixing metal fittings in the storage case, Fig. 4 is a perspective view showing the state in which the storage case with the parts shown in Fig. 3 assembled and stored is fitted with the storage cover, and Fig. 5 is a perspective view showing the storage case. FIG. 6 is a partial plan view showing the movement of the guide ring and the fixing fitting; FIG. 7 is a sectional view showing the movement range of the fixing fitting; Fig. 8 is a sectional view showing a state in which the pressure lid and the upper end of the fixing fitting are in contact with each other, Fig. 9 is a sectional view showing a state in which the fixing fitting is fitted to the pressure cover and the pot, and Fig. 10 is a sectional view of another embodiment. A sectional view of a fitting device for fixing fittings, a pot, and a pressure lid is shown. 1: Rice cooking heater, 2: Protective frame, 3: Heat retention heater, 4: Center thermo, 6: Switch lever,
8: Micro switch, 15: Outer lid, 19: Outer lid cover, 20: Heat sink, 24, 124: Pot, 24
a: Hook part on pot rim, 25, 125: Pressure lid, 2
5a: Hook part on pressure lid edge, 28: Pressure adjustment weight, 32, 132: Fixing metal fitting, 32a: Hook part on upper end of fixing metal fitting, 32b: Hook part on lower end of fixing metal fitting, 32c: Opening hole in fixing metal fitting. Part, 33: sliding shaft,
34: Guide ring, 34a: Guide plate, 34b:
Operation lever, 35: Pressure knob, 36: Lower storage case, 36a: Long hole in storage case, 36b:
Fitting recess of storage case, 36c: Fitting protrusion of storage case, 37: Storage cover, 37a: Long hole of storage cover, 37b: Fitting protrusion of storage cover, 3
8: Metal fitting sliding device.

Claims (1)

[Claims] 1. A split fixture with a circular arc shape and a U-shaped cross section is formed to removably fit into the outer edges of the pot and pressure lid that constitute the pressure cooker, and this fixture has a sliding shaft protruding from its upper and lower surfaces. The fixing fitting is arranged on the inner periphery of a ring-shaped guide ring which has a guide plate on the inner surface to be inserted into the opening provided on the outer peripheral side of the fixing fitting and has an operating lever on the outer surface. A ring-shaped storage cover and a storage case are provided for storing the metal fittings and a guide ring, and a long hole inclined toward the center is provided on the top surface of the storage cover and the bottom surface of the storage case, and the sliding shaft of the fixing metal fitting is inserted into the long hole. The tightening device for a pressure cooker is configured such that the fixing fitting is moved inward by inserting the control lever and rotating the operating lever to position the outer edges of the pot and the pressure lid within the fixing fitting. The outer edges of the pot and the pressure lid are bent so that the cross section becomes a V-shape with the ends widened, and the upper and lower surfaces of the fixing fittings are narrowed at their openings so that the height of the inner circumferential side is A pressure cooker characterized in that the slope surface is lower than the height of the outer circumferential side and has a shape that matches the outer edge of the pot and the pressure lid.