JPS5856575Y2 - rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric rice cooker that prevents spillage of water, juice, etc. from reaching the switch installed inside the heat-sensitive body even if water or juice spills inside the outer pot.

In this type of rice cooker, a through hole is formed in the bottom surface of the outer pot in which the inner pot is arranged so as to be freely stored, through which a heat sensitive element that comes into elastic contact with the outer bottom surface of the inner pot is penetrated, and an annular protrusion is provided on the periphery of the through hole. A cylindrical body is provided between the annular protrusion and the bottom surface of the outer pot along the outer periphery of the heat sensitive body, an annular rice cooking heater is provided on the outer periphery of the cylindrical body, and a cylindrical body is provided on the outside of the cylindrical body. If the drain hole is located at the bottom of the outer pot and the drain hole is communicated with the inside of the cylindrical body to drain water, juice, etc. to the outside of the outer pot, an annular rice cooking heater may be used. Because of this, solid matter such as rice grains can easily reach the drain hole when the inner pot is removed, and there is a risk of blocking the drain hole.

The present invention has been made to solve the above problems.

To explain the drawings below, 1 is a cylindrical frame;
Reference numeral 2 designates a bottomed cylindrical outer pot having a cylindrical body 4 at the bottom, which is installed inside the frame 1 with a heat insulating material 3 interposed therebetween, and 5 is a sheathed rice cooking heater installed at the inner bottom of the outer pot 2.

Reference numeral 6 denotes an inner pot which is suspended from the outer pot 2 with a slight interval so that it can be stored freely, and an upper opening flange portion 7 is placed on the upper flange portion 8 of the outer pot 2.

Reference numeral 9 denotes an inner lid that covers the opening of the inner pot 6, and has an insertion hole 10 and a steam return hole 11 in the center, and a steam hole 12 on the outside.

Reference numeral 13 denotes a heat-insulating lid with good heat conduction, whose outer periphery is placed on the inner lid 9 to form the space A, and 14 a handle that is pivotally supported on one side to the frame 1 and can be hung on the other side. It is a dual-purpose outer lid, with a heat insulating material 15 inside and a cord-shaped top lid heater 16 attached to the inside of the back side.

Reference numeral 17 denotes a pressure locking mechanism provided at the center of the back surface of the outer lid 14, which is comprised of a spring 18, an elastic engagement body 19 that is always urged downward by the spring, and a locking rod 20 that is installed vertically. configured.

21 is a steam guide tube provided on one side of the heat-insulating lid 13;
Reference numeral 2 denotes a heat sensitive element which is energized so as to always protrude upward from the upper surface of the cylindrical body 4 formed in the center of the outer pot 2, and 23 a thermal lead, for example, which is attached closely to the outer wall of the outer pot 2. It is a heat-sensitive element like a switch for controlling the heat retention temperature, and it is turned on from room temperature to around 70 degrees, which is considered the optimal temperature for heat retention.
It turns off at temperatures higher than 70°.

24 is a ring-shaped frame cover in which the outer pot 2 and the upper periphery of the frame 1 are fitted and fixed at a constant interval;
Reference numeral 25 denotes a cord-shaped side heater closely attached to the upper outer wall of the outer pot 2, which is composed of a first auxiliary heater 26 for temperature control and a second auxiliary heater 27 for continuous energization.

Reference numeral 28 denotes a switch cover attached to one side of the frame 1; 29, an arbitrary part is pivotally supported, one end is positioned inside the switch cover 28, an operation button 30 is attached; the other end is used to operate the heat sensitive element 22; A switch lever 32 is connected to the rod 31 and allows each end to operate in a seesaw manner, and is a bottom cover that also serves as a support leg that covers the bottom of the frame 1.

Next, the structure of the above-mentioned heat sensitive body will be explained. 33 is a circular heat receiving body with good heat conduction, 34 is a pair of holding parts 35.
As shown in Figure 5, the holding plate 36 is a ferromagnetic material with high magnetic permeability (magnetic flux density) at room temperature, and as the temperature rises, it reaches a certain temperature (Curie temperature...approximately 140°). Then, the holding part 3 is made of temperature-sensitive ferrite composed of Mn, Cu, and Zn ferrite, which are weakly magnetic and have low magnetic permeability.
It is held and fixed by 5.35.

37 is a substantially cylindrical storage case whose lower part is bent inward, 38 is a waterproof cover with a wide cross section, and the peripheral edges of the holding plate 34, the storage case 37, and the waterproof cover 38 are respectively It is clamped and fixed by heat receiving plates 33.

39 is a magnet fixed to the upper part of the operating rod 31;
0 is a metal fitting that penetrates the operating rod 31 and fixes the magnet 39, and is provided with a concave groove 41 on the outside and a protrusion 42 projecting downward on the inside.

43 is a ring that prevents the magnet holder from removing the metal fitting 40;
Reference numeral 44 denotes a first spring interposed between the groove 41 and the holding plate 34, which constantly presses the magnet 39 downward so as to separate it from the ferrite 36.

The first spring 44, the magnet 39, the magnet holder, and the metal fitting 40 are stored in a storage case 37, and the magnet 39 is connected to the operating rod 31 by operating the switch lever 29.
It moves up and down in the storage case 37 by means of the upper and lower parts.

Reference numeral 45 denotes a circular insulating base fixed to the lower part of the storage case 37 with screws (not shown), and terminal plates 46' and 47' each having contacts 46 and 47 facing each other on one side.
and a movable contact 50 having elasticity and having a contact 48 and a hole 49 provided between the contacts 46 and 47 and making switching contact with one of the contacts, and a terminal plate 48' electrically connected and fixed to the contact plate 50. is provided, and the upper part is covered with an insulating lid body 51.

Said contacts 46, 47, 48 and terminal plates 46', 47', 4
8' and movable? The contact plate 50 constitutes the first switch 1, and the movable contact plate 50 is constructed so that the contact 48 is always in contact with the contact 47 side due to its own elasticity.

Reference numeral 52 denotes a cylindrical portion 53 that freely passes through the operating rod 31 and is provided at the bottom.
1 is a substantially funnel-shaped movable insulator that passes through the hole 49 of the movable contact 50; a second spring 11 interposed in the first switch I;
A second switch separated from the first switch (1) and (2), which is associated only with the mechanical operation by the vertical movement of the operating rod 31, has a common terminal 55 and two switching terminals 56, 57.
Normally (when the temperature-sensitive ferrite 36 and the magnet 39 are attracted to each other).

) is configured such that the common terminal 55 and one terminal 56 are in contact with each other, and when the operation button A is pressed, the common terminal 55 and the other terminal 57 are brought into contact with each other.

58 is a relatively thick synthetic resin L-shaped mounting plate on which the second switch II is partially attached and fixed to the insulating base 45 with screws 59; 60 is a part of the L-shaped mounting plate 58; This is a feather-shaped switching guide groove for maintaining switching, which is formed in a step-like manner.

Reference numeral 61 denotes a push ring that comes into contact with the cylindrical portion 53 of the movable insulator 52 attached to the appropriate position of the operating rod 31 when the magnet 39 attracts the ferrite 36, and 62 is located below the push ring 61 for operation. Reference numeral 63 denotes a retaining ring attached and fixed to the rod 31, and 63 is a mounting plate for a switching guide rod, which will be described later, with one side fixed relatively below the operating rod 31 with a screw 64 and the other side extended, and 65, one end of which is fixed. It is pivotally supported on the mounting plate 63, and the other end is shaped like a pin and fitted into the switching guide groove 60.
The switching guide rod is configured to come into sliding contact with the guide groove 60, and is always biased by a return spring 66 so that one end comes into elastic contact with the bottom wall of the guide groove 60 and moves to the right in the drawing.

67 loosely penetrates the operating rod 31, and a retaining ring 62 is provided at the rear.
and an operation button (not shown) of the second switch II;
68 is a third spring interposed between the press fitting 67 and the mounting plate 63 and energized so as to separate them; 70 is a stopper attached to the peripheral edge of the cylindrical body 4 of the outer pot 2 so as to protrude downward; 71 .71 is a washer which is attached and fixed to the operating rod 31 so that the other end of the switch lever 29 is positioned above and below the switch lever 29 with some play in the vertical direction.

The cylindrical body 4 is attached to the outer pot 2 so as to surround the waterproof cover 38.
It is made up of a heat shield plate attached and fixed to the rice cooker heater 5 to prevent the radiant heat from the rice cooking heater 5 from directly hitting the ferrite etc. Furthermore, the upper end is bent inward and has a hook part 72. An opening 90 is formed.

A fourth spring 73 is interposed between the waterproof cover 38 and the outer pot 2, and is energized so that the heat receiving plate 33 is always in close contact with the outer bottom surface of the inner pot 6.

Each part of the cylindrical body 4 except for the stopper 70 mentioned above is constructed integrally, and each part is constructed to be vertically movable by the fourth spring 73.

FIG. 3 shows a structure for preventing water from entering the heat sensitive element 22, in which a gap 81 is formed at an arbitrary location between the outer flange 91 of the lower end of the cylindrical body 4 and the outer pot 2, and the outer pot 2 is transparent. Hole 8
An annular protrusion 83 is provided by bending the hole wall of No. 2 upward, and the gap 81 is provided at a low position relatively apart from the through hole 82.
An appropriate number of drainage holes 84 are bored in the outer pot 2 located inside.

If water is accidentally spilled into the outer pot 2 while the inner pot 6 is removed, some of it will fall along the outer peripheral wall of the bulge 4 as shown in the figure, and some of it will spill onto the waterproof cover 38. The water falls along the inner peripheral wall of the cylinder 4 through the space between the end of the cylinder 4 and the hooking part 72 of the cylinder 4.
The water falls into the reservoir 85 formed by the above-mentioned gap 81 and falls downward through the water drain hole 84, thereby preventing water from entering into the heat sensitive element 22.

Therefore, since the drain hole is formed inside the gap, the drain hole is not visible from the outside even when the inner pot is removed from the outer pot, which is aesthetically pleasing.

As mentioned above, a through hole is formed in the bottom surface of the outer pot in which the inner pot of the present invention is arranged so as to be freely stored, through which the heat sensitive element that comes into elastic contact with the outer bottom surface of the inner pot is penetrated, and an annular protrusion is erected around the periphery of the hole. and a cylindrical body that stands outside the annular protrusion and along the outer periphery of the heat sensitive body, and an annular rice cooking heater is provided on the outer peripheral layer of the cylindrical body. This is because an outward flange is formed on the lower edge, a gap is formed between the outward flange and the bottom of the outer pot, and a drain hole is formed in the bottom of the outer pot located within the gap. Since the upper part of the drain hole is completely covered by the outward flange, the drain hole is prevented from being blocked by solid matter, and water etc. can be smoothly drained out of the outer pot, which is highly effective.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the rice cooker of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1, and FIG. 3 is a schematic cross-sectional view of the main part showing the overflowing state when the inner pot is not in line. 2... Outer pot, 4... Cylindrical body, 22...
・・・Thermosensitive body, 81... Gap, 83...
- Annular protrusion.

Claims (1)

[Scope of utility model registration request] A through hole is formed in the bottom surface of the outer pot in which the inner pot is disposed so as to be freely stored therein, through which a heat-sensitive element that is in elastic contact with the outer bottom surface of the inner pot is passed, and an annular protrusion is erected around the periphery of the through hole, and the annular protrusion a cylindrical body standing upright along the outer periphery of the heat-sensitive body on the outside of the cylindrical body, and an annular rice cooking heater provided on the outer periphery of the cylindrical body, the cylindrical body having an outward flange portion on the lower end periphery of the cylindrical body. and a gap is formed between the outward flange portion and the bottom surface of the outer pot, and a drain hole is formed in the bottom surface of the outer pot located within the gap.