JPS5854018Y2 - electric rice cooker - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of an electric rice cooker.

Conventionally, an outer pot has an inner bottom equipped with a rice cooking heater and a bulge with an open top, an inner pot is placed inside the outer pot and accommodates the food to be cooked, and the bottom of the inner pot is compressed by a spring. An electric rice cooker equipped with a heat sensitive body disposed within the bulge as shown in FIG.

In this conventional example, the lower end of the storage case constituting the heat sensitive element is bent outward, and this bent part is brought into contact with the opening edge of the bulging part, and the spring is received at this bent part. This prevents the heat-sensitive element from popping out, and the storage case functions as a waterproof cover.

However, with such a configuration, in order to facilitate the setting of the dimensional relationship between the operating distance of the heat sensitive element and the operating point of the rice cooking switch, and to reduce the space below the outer pot, it is difficult to fix the switch to the bottom surface of the storage case. The lower end of the storage case is bent outward, and the spring is received at this bent portion, so it cannot be easily fixed.

In view of the above-mentioned problems, the present invention allows a switch to be easily fixed to a heat sensitive element, makes it easy to attach a waterproof cover to the heat sensitive body, and prevents water from entering the inner pot etc. into the heat sensitive body. The purpose is to

To explain the drawings below, 1 is a cylindrical frame;
Reference numeral 2 denotes a bottomed cylindrical outer pot having a bulging portion 4 at the bottom, which is installed in the frame 1 with an IEF and a heat material 3 interposed therebetween, and 5 indicates a sheathed rice cooking heater installed at the inner bottom of the outer pot 2. It is.

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 11 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 bulge 4 formed in the center of the outer pot 2, and 23 a heat sensitive element, for example, a thermal element, which is attached in close contact with the outer wall of the power pot 2. It is a heat-sensitive element like a reed switch for controlling the heat retention temperature, and it is turned on from room temperature to around 70 degrees, which is considered the optimum temperature for heat retention, and turned off at temperatures higher than this 70 degrees.

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 1 of the frame 1; 29, an arbitrary part is pivotally supported, one end is positioned inside the switch cover 28, and an operation button 30 is attached; the other end is attached to the heat sensitive element 22; A switch lever 32 connects to the operating rod 31 to operate the respective ends in a seesaw operation;
It is a bottom cover that also serves as support and covers the bottom of the unit.

Next, the structure of the above-mentioned heat sensitive body will be explained. 33 is a circular heat receiving plate with good heat conduction, 34 is a pair of holding parts 35,
As shown in Fig. 5, the retaining plate 35 has a ferromagnetic material with a magnetic permeability (magnetic flux density) of 100%, and becomes weakly magnetic when it reaches a certain temperature (Curie temperature, about 140 degrees) as the temperature rises. The holding portions 35,
At 35, J: is held and fixed.

Reference numeral 37 denotes a substantially cylindrical storage case with its lower part bent inward and extending; 38 a waterproof cover with a wide bottom-shaped cross-section; The periphery of the heat receiving plate 33 is clamped and fixed by bending 33a in an inward L-shape as shown.

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 has 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.

45 is a screw (
A terminal board 4 having contact points 46 and 4γ facing each other on one side.
A movable contact plate 50 having elasticity and having a contact 4B and a hole 49, which is provided between the contacts 46 and 47 and the contacts 46 and 47, and which is electrically connected and fixed to the contact plate 50. A terminal plate 48' is provided, and the upper part is covered with an insulating cover 5.
It is covered by 1.

The contacts 46, 47° 48 and the terminal plates 46', 47', 4
8' and the movable contact plate 50 constitute the first switch (I), and the movable contact plate 50 closes the contact 48 due to its own elasticity.
The contact point 47 is always in contact with the contact point 47 side.

Reference numeral 52 denotes a cylindrical portion 53 that freely passes through the operating rod 31 and is provided at the bottom.
is a substantially funnel-shaped movable insulator that passes through the hole 49 of the movable contact plate 50; The second spring (n) is attached to the first switch (
A second switch separated from the first switch (I), which is connected only to the mechanical operation by vertical movement of the separating operation rod 31, has a common terminal 55 and two switching terminals 56.
57 is provided, and 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 part of screw 59 for installing the second switch (n).
60 is a fletching-shaped switch formed in a part of the above-mentioned gradual increase plate 58 for maintaining switching. This is a guide groove that has stepped steps.

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 and ferrite 36 are attracted, 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 is a loose penetrating ring on the operating rod 31, and the group is a retaining ring 62.
and an operation button (not shown) of the second switch (II), a press fitting 69 is interposed between the press fitting 67 and the mounting plate 63. A third spring energized so as to separate them; 70 a stopper attached to the peripheral edge of the bulging portion 4 of the outer pot 2 so as to protrude downward; 71 and 71 a stopper 71 and 71 so that the other end of the switch lever 29 is moved upwardly and downwardly; These are washers that are attached and fixed to the operating rod 31 at the upper and lower portions thereof with a slight play.

The bulging portion 4 is composed of a heat shield plate attached and fixed to the outer pot 2 so as to surround the waterproof cover 38, and prevents the radiant heat from the rice cooking heater 5 from directly hitting the ferrite etc. Furthermore, the upper end is bent inward to form the 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 except the heat shield plate 4 and the stopper 70 described above is constructed integrally, and each 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 an appropriate number of rows of gaps 81 are formed at arbitrary locations between the lower end peripheral flange portion 91 of the bulging portion 4 and the outer pot 2. An annular projecting piece 83 is provided by bending the hole wall of the communication hole 82 upward, and an appropriate number of drainage holes are provided in the outer pot 2 located in the gap 81 at a low position relatively distant from the communication hole 82. 84 are drilled.

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. Water falls along the inner peripheral wall of the bulging part 4 through the space between the end of the bulging part 4 and the hooking part 72 of the bulging part 4, and the water falling down this inner peripheral wall is formed by the annular protruding piece 83. The water falls into the storage portion 85, passes through the gap 81, falls downward through the drain hole 84, and is prevented from entering into the heat sensitive element 22.

Further, the outer diameter of the flange portion 91 of the waterproof cover 38 is set to be smaller than the inner diameter of the opening 90 of the bulging portion 4, so that the heat sensitive element 22 is raised by the fourth spring T3 when the inner pot 6 is not placed. When the first and second switches (I) and (ff) are attempted to be opened, the flange portion 91 is held in place so that the heat sensitive element 22 is restricted from rising at a certain point. It comes into contact with the portion 72.

The present invention is constructed as described above, and the waterproof cover 38 is provided separately from the housing case 37 for the heat sensitive element 22, so that the waterproof cover receives the spring 73, and the lower end of the housing case 37 is bent inward. Since the switch (■) is fixed to this bent portion 37a, the switch (I) can be easily attached to the heat sensitive element 22, thereby making the connection between the heat sensitive body 22 and the operating point of the switch (I) Dimensional settings can be easily made, and the space below the outer pot 2 can be reduced.

Further, the waterproof cover 38 covers a heat receiving plate 33 that constitutes the heat sensitive body 22.
The waterproof cover 38 can be fixed together with other components at the inward single-shaped portion 33a on the periphery thereof, and the waterproof cover 38 can be fixed easily and reliably, and water droplets are difficult to enter into the heat sensitive body 22.

Furthermore, since the switch (I) is covered with the waterproof cover 38, there are great effects such as being able to prevent water droplets from reaching the switch (I).

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the electric rice cooker of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is a schematic sectional view of the main part showing the overflowing state when the inner pot is not stored. . 2...Outer pot, 4...Bulging part, 22...
...Thermosensitive body, 38 ... Waterproof cover, 73.
·····spring.

Claims (1)

[Scope of utility model registration request] An outer pot having a rice cooking heater and a bulging portion with an open top at the inner bottom, an inner pot placed inside the outer pot and accommodating the rice to be cooked, and the bottom of the inner pot being compressed by a spring. and a heat-sensitive member disposed within the bulging portion, the heat-sensitive member housing a heat-receiving plate in contact with the lower surface of the inner pot, a temperature-sensitive ferrite, and a magnet so as to be in contact with and separated from the temperature-sensitive ferrite. The cylindrical storage case is constructed by bending the periphery of the heat receiving plate into an inward L-shape to sandwich the temperature-sensitive ferrite and the periphery of the storage case, and stores the upper end of the waterproof cover with a wide hem. The inward L-shaped portion of the heat receiving plate on the outside of the case is integrally clamped and fixed to the storage case, and the lower end of the storage case is bent inward and the bent portion is interlocked with the magnet. A switch that is opened and closed by an operating lever is fixed, the spring is arranged inside the waterproof cover, and the lower edge of the waterproof cover has a diameter larger than the opening of the bulge. Electric rice cooker.