JPH0242484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tightening device for a pressure cooker that can tighten the fitting between a pot and a pressure lid that constitute a pressure cooker 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 the disadvantage that the operation is not easy and the structure is complicated and cannot be easily disassembled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure cooker tightening device which can easily fit and tighten a pot and a pressure lid, has a simple structure, and is easy to disassemble.

The present invention will be explained based on the 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 adjusting weight portion, and Figs. 6 is a local 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. The figure shows a sectional view showing a state in which the pressure lid and the upper end of the fixture are in contact with each other, and FIG. 9 shows a sectional view showing a state in which the fixture fits into the pressure lid and the pot.

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. Reference numeral 2 denotes a protective frame, which has 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 upper part. 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'm 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. 1
3 and 14 are a cord reel and legs attached to the lower surface of the body 10. Reference numeral 15 denotes an outer cover made of a resin material with a handle part integrally molded; a support part that fits into the hinge part of the upper frame 9 is pivotally supported by a hinge shaft 16, and a hook lever 1 has a hook button 17 fixed to the other end.
8 is fitted to the hook portion of the upper frame 9 to lock the entire lid. 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. The outer lid cover 19 is attached 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. Reference numeral 24 denotes a pot removably placed on the rice cooking heater 1, and a hook portion 24a is formed by bending the entire outer circumference of the outer peripheral edge portion of the upper end downward. Reference numeral 25 designates a pressure lid that airtightly covers the upper opening of the pot 24 via a pot gasket 26, and has a hook portion 25a formed by bending the entire outer periphery of the lower end upward, as shown in FIG. A nozzle 27 is attached to the top surface, and a pressure adjustment 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 an inverted convex cross section that removably engages with the holder gasket 22, and the lower end also has a hook portion 29b similar to the upper end. ing. Reference numeral 30 is an inner cover with several small holes on the bottom surface of the pressure cover 25 to prevent sticky substances from blowing out from the nozzle 27, and is removably fitted to the hook 29b at the lower end of the safety device 29. A matching inner lid gasket 31 is attached to the through hole in the center, and the outer peripheral wall is supported by the pot gasket 26.

As shown in FIG. 7, reference numeral 32 denotes a fixing metal fitting which is a ring-shaped cross-sectional lip groove type metal fitting divided into six equal parts in the present invention. As shown in FIG. 3, a sliding shaft 33 is fixedly protruding from the upper and lower surfaces, and an opening 32c is provided in the center of the side surface. 3
Reference numeral 4 denotes a ring-shaped guide ring, and a guide plate 34a is inserted into the opening 32c of the fixing fitting 32 on the inner surface.
A control lever 34b having one pressure knob 35 attached to the tip is fixed to the outer surface. 3
6 is a ring-shaped lower storage case with an L-shaped cross section.
A long hole 36 that accommodates the fixing fitting 32 and the guide ring 34, and on the bottom of which the sliding shaft 33 of the fixing fitting 32 slides.
a is inclined toward the center, a fitting recess 36b is provided at the upper end of the side, and a fitting protrusion 36c is provided on the outer surface.
has been established. As shown in FIG. 4, reference numeral 37 designates a ring-shaped storage cover with an inverted L-shaped cross section that fits into the upper part of the storage case 36.
A long hole 37a is provided in the same shape and at a position opposite to that, into which the sliding shaft 33 is inserted, a fitting protrusion 37b is provided at the outer lower end, and the fitting protrusion 37b is fitted into the fitting recess 36b of the storage case 36. Together, they constitute a metal fitting sliding device 38. Storage case 3 for this metal fitting sliding device 38
The fitting protrusion 36c provided at 6 is fitted into the fitting recess 19a of the outer lid cover 19 to be detachably attached to the lid.

Next, the movement and function of the metal fitting sliding device 38 of the present invention 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 fixture 32, and the sliding shaft 33 of the fixture 32 connects to the lower surface of the hook 24a of the pot 24 along the elongated holes 36a and 37a that are inclined towards the center and are provided on both sides of the storage case 36 and the storage cover 37. Pressure lid 25
The fixing metal fitting 32 slides to the position indicated by the two-dot chain line in FIG. 7, where it fits into the edge of the upper surface of the hook portion 25a. Conversely, when the pressure knob 35 is moved in the opening direction, the fixing metal fitting 32 moves outward and comes off the edges of the hooks 24a and 25a of the pot 24 and pressure cooker 25, so that only the pressure knob 35 can be operated. , the pot 24 and the pressure lid 25 constituting the pressure cooker can be easily attached and detached.

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

As shown in Fig. 1, when the rice cooking button 7 is pressed, the magnet 4a in the center thermostat 4 is attracted to the ferrite in conjunction with the upward movement of the switch lever 6, and the micro switch 8 is turned on, and the rice cooking heater 1 is energized. Cooking begins. 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 rises to 100°C or more, the entire pressure lid 25 moves upward, and the pressure lid 2
5 Hook part 32 on the upper surface of the outer edge and the upper end of the fixing fitting 32
a and push up the fixing metal fitting 32, and the hook portion 32b at the lower end of the fixing metal fitting 32 and the lower surface of the outer edge of the pot 24 contact and fit together. At this time, the pot 24, the pressure lid 2
Each hook 24a, 25a, 32a, 32b prevents the fixing fitting 32 from coming off from the outer edge of the outer edge of the fitting 5, and is firmly fitted to withstand internal pressure.

When the internal pressure of the pot 24 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, thereby keeping the internal pressure constant and cooking rice.

When rice cooking is complete, the temperature at the bottom of the pot 24 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 turns OFF, and the heat retention heater 3 , the electricity is switched to the lid heater 21 to keep it warm.

Although the pressure cooker of the present invention can cook delicious rice in a shorter time than conventional cooking utensils as described above, it is difficult to fit the pot and pressure lid together and is difficult to handle. By installing a metal fitting sliding device that allows the fixing metal fittings that fit on the outer edges of the pot and pressure lid to be slid and tightened in a removable manner with a single operation of the pressure knob, there are no restrictions on the fitting position.
The mating operation is extremely easy and anyone can handle it.
It produces effects such as ease of use.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a pressure jar rice cooker showing an embodiment of the present invention, Fig. 2 is a sectional view of the main parts thereof, and Fig. 3 is a guide ring attached to the storage case at the bottom of the metal fitting sliding device of the present invention. FIG. 4 is a perspective view showing the procedure for storing the fixing metal fittings, FIG. 4 is a perspective view showing the state in which the storage case in which the parts shown in FIG. 3 are assembled and stored is fitted with the storage cover, and FIG. 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, and Fig. 8 is the pressure cover. A cross-sectional view showing a state in which the upper end of the fixing fitting and the upper end of the fixing fitting are in contact with each other, No. 9
The figure shows a sectional view showing a pressure lid and a fixing fitting fitted to a pot. 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 radiation plate, 24: Pot, 24a: Hook on pot edge, 25: Pressure lid, 25a: Hook on pressure lid edge, 28 : Pressure adjustment weight, 32: Fixing metal fitting, 32a: Hook part at upper end of fixing fitting, 32b:
Hook part at lower end of fixing bracket, 32c: Opening part of fixing bracket, 33: Sliding shaft, 34: Guide ring, 34
a: Guide plate, 34b: Operation lever, 35: Pressure knob, 36: Lower storage case, 36a: Long hole of storage case, 36b: Fitting recess of storage case, 3
6c: Fitting protrusion of storage case, 37: Storage cover, 37a: Long hole of storage cover, 37b: Fitting protrusion of storage cover, 38: 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, which are vertically separable for storing metal fittings and a guide ring, and a long hole inclined toward the center is provided on the upper surface of the storage cover and the lower surface of the storage case, and the fixed metal fitting is inserted into the long hole. By inserting the sliding shaft and rotating the operating lever, the fixing metal fitting is moved inward, and the outer edges of the pot and the pressure lid are positioned within the fixing metal fitting. Tightening device for pressure cookers.