JPS5849697Y2 - Cooking device - Google Patents

Description

[Detailed description of the invention] This invention relates to cooking appliances such as heat-retaining rice cookers and electric heat insulators, and in particular to a heat transfer assembly that is installed at the center of the inner surface of the outer lid so as to be movable up and down and supports the inner lid in a removable manner. This relates to the mounting structure.

Embodiments of the present invention shown in the drawings will be described in detail below.

First, FIG. 1 is a schematic cross-sectional view of the proposed cooking device, and the heat-retaining rice cooker is roughly divided into a main body 1, an inner pot 2, an inner lid 3, an outer lid 4, and the like.

The container body 1 includes an outer body 5, a bottom lid 6 that constitutes an exterior body with the body 5, an outer pot 7 located inside the outer body 5, and an outer pot 7 disposed between the upper ends of the outer body 5 and the outer pot 7. It consists of an upper ring 8, and a heat insulating material (not shown) loaded between the outer body 5, the outer pot 7, and the upper ring 8.

The outer circumferential body 5 is equipped with a hinge angle 9 and a hinge receiver 10 on the upper side, and a dew receiver 12 is detachably provided below a flow hole 11 formed by vertically penetrating the hinge receiver 10. , this dew receptor 12 is connected to the upper ring 8
The dew that is received by the drain hole 11 and drips down through the flow hole 11 is accommodated.

Additionally, the outer body 5 has a hook angle 13 and a latch hook 1 at an upper position opposite to the position of the hinge angle 9, etc.
4 and hook cover 15 are installed.

The bottom cover 6 is made of a synthetic resin molded product, and the upper end of the outer periphery is fitted into the lower end opening of the outer periphery body 5.

This bottom cover 6 has a plurality of supporting legs 16 projecting downward at the peripheral edge of the lower surface, a cord reel storage recess 17 formed on the lower surface with the central portion bulging upward, and a central portion of the recess 17. Furthermore, a terminal storage portion 18 formed to bulge upward and a plurality of attachment bosses 19 formed to bulge upward at the peripheral edge of the storage recess 17 are integrally formed at the bottom.

A cord reel 20 is placed in the storage recess 17, and the cord (not shown) drawn from the cord reel 20 is led out through a notch 21 in the peripheral wall of the storage recess 17. .

Therefore, the cord reel 20 is installed by inserting a plurality of mounting tongues 24 erected on the periphery of the lid 23 of the storage case 22 into the long holes 25 formed in the bottom lid 6, and then twisting the cord reel 20. When the lid 23 is installed, the lid 23
The connection terminal 26 is set to face inside the terminal storage section 18.

The connection terminal 26 is used to electrically connect the cord to the electrical components on the device body 1 side, and a lead wire (not shown) on the device body 1 side is wired in a part of the terminal housing 18. A connection port 27 is formed for this purpose.

In addition, a large number of small holes 28 for heat dissipation are bored in appropriate places on the lower surface of the bottom cover 6 except for the storage recess 17.

Further, a switch panel 29 is attached at a suitable location where the outer body 5 and the bottom cover 6 are joined.

This switch panel 29 is made of synthetic resin,
An operation port 30 of a switch mechanism to be described later, three display holes 31 arranged vertically on one side of the operation port 30, a flange 32 located at the periphery of the lower half, and a flange 32 located at the periphery of the upper half. It has a plurality of locking ribs 33 located at a predetermined interval from each other.

On the other hand, notches 34 and 35 are formed in both the outer peripheral body 5 and the bottom cover 6, and the notches 34 and 35 form an opening into which the switch panel 29 is fitted when the two are connected and fitted.

A fitting groove 36 is formed on the periphery of the notch 35 of the bottom cover 6, and a plurality of rattling prevention tabs 37 are formed on the outer wall surface of the fitting groove 36.
form.

Of course, the fitting groove 36 and the rib 37 are integrally molded into the bottom cover 6 when it is molded.

Thus, the switch panel 29 has a front upper half periphery 29.
a and the locking rib 33 sandwich the periphery of the notch 34 of the outer body 5, and the flange 32 is fitted into the fitting groove 36 of the bottom cover 6. In this attached state, the outer body 5 and the bottom cover 6
It is securely held by the joint fitting with.

The outer pot 7 has a wide upper recessed groove 38 and a narrow lower recessed groove 39 located below the upper groove 38 all around the outer surface thereof, and a seam plate 40 is formed in the upper recessed groove 38. An integrated cooking heater 41 and a heat-retaining heater 42 are provided and fixed by tightening both ends with fastening means such as screws 43. The heater 44 is similarly fixed by fastening.

Furthermore, a mounting surface 45 is formed on the outer surface of the outer flange 7 at a suitable location between the upper and lower concave grooves 38 and 39, and a heat-retaining heat-sensitive element, such as a thermal reed switch 47, is mounted on this mounting surface 45 via a heat-sensitive element mounting angle 46. is installed.

On the other hand, a through hole 48 is bored in the center of the bottom surface of the outer pot 7, and a plurality of bulging attachment parts 49 are formed around the through hole 48 as a center.

The bulging mounting portion 49 has one side open to form a locking hole 50, and has a through hole 51 in the center.

A ring-shaped hot plate 52 and a heater angle 54, which are integrally cast with a rice-cooking heater 53, are attached to the bulging attachment portion 49 of the outer pot 7 (not shown in detail).

The heating plate 52 has a threaded hole 55 facing the through hole 51 of the bulging mounting portion 49, and the heater angle 54 has a tenth hole.
As shown in the figure, the upper and lower ends are bent in opposite directions to form upper and lower mounting pieces 56 and 57, and the locking claw 5 is attached to the tip of the upper mounting piece 56.
8 is provided protrudingly, a through hole 59 is bored, and a screw hole 60 is formed in the lower mounting piece 57.

The hot plate 52 is placed on the inner bottom surface of the outer pot 7 so that the round hole 55 and the through hole 51 match, and the upper mounting piece 56 of the heater angle 54 is placed on the lower surface of the bulging mounting portion 49. The locking pawl 58 is brought into contact with the engaging hole 50, and the through holes 51, 59 are
With the outer pot 7. aligned, the outer pot 7. The hot plate 52 and heater angle 54 are fixed.

The lower mounting piece 57 of the heater angle 54 comes into contact with the mounting boss 19 of the bottom cover 6 (not shown in detail) for mounting.

That is, the bottom cover 6 is fixed to the heater angle 54 with a screw that passes through the mounting boss 19 and is screwed into the screw hole 60.

At this time, although the heater angle 54 is attached to the outer pot 7 side with a single screw, it is prevented from rotating and positioned by the engagement of the locking pawl 58 and the engagement hole 50, so the lower mounting piece of the heater angle 54 is The attachment boss 19 of the bottom cover 6 can be easily matched with the attachment boss 19 of the bottom cover 6, and the attachment work of the bottom cover 6 can be easily performed.

The terminal portion of the rice-cooking heater 53 cast into the hot plate 52 is led out to the outer bottom surface side through a lead-out hole 61 formed in the bottom surface of the outer pot 7.

Further, a rice cooking thermostat 62 protruding from the upper surface of the hot plate 52 passes through the through hole 48 so as to be vertically movable, and is elastically supported by the outer pot 7 by a spring 63.

Furthermore, a heat-sensitive element for cooking, such as a thermal reed switch 64, is installed on the outer bottom surface of the outer pot 7.

A switch mechanism assembly 65 is installed in the space between the bottom cover 6 and the outer bottom surface of the outer pot 7.

The assembly 65 consists of a base plate 66 having a shape of 3, a rice cooking lever 68 whose intermediate portion is rotatably supported on a shaft 67 between opposing side walls of the base plate 66, and a side wall of the base plate 66. A power supply lever 69 is arranged in parallel with the rice-cooking lever 68 and is rotatably supported at its intermediate part by a shaft 67, and a common fixed contact is attached between the free edge of the side wall of the board 66. 71 and 2
An insulating plate 70 having two movable contact plates 72 and 73 is interposed between the substrate 66 and the power lever 69, and the biasing direction of the power lever 69 is reversed during rotation of the power lever 69.
Reversing spring 74 for selectively holding 9 in the upper position and lower position
The rice-cooking lever 68 is protruding from the insulating plate 70, and as the rice-cooking lever 68 rotates, the movable contact plate 7
2 toward and away from the fixed contact plate 71 (not shown);
an actuator (not shown) that moves the movable contact plate 73 toward and away from the fixed contact plate 71 as the contact plate 9 rotates; The handles 77 and 78 are attached to the ends of the same side of both levers 68 and 69, respectively, and the other end of the rice cooking lever 68 is connected to the rod 7 of the rice cooking thermostat 62.
It is linked to 9.

In addition, when the handle 77 side of the rice cooking lever 68 is pushed down, the power lever 69 rotates in the same direction, and in this rotation position, the lever 68 and the lever 69 turn to the 78 side of the power lever 69. When the rice cooking lever 68 is pushed up, the rice cooking lever 68 is set to return to rotation in the same direction, and the rain levers 68 and 69 are rotated independently during operations other than those mentioned above.

Thus, the switch mechanism assembly 65 configured in this way is attached to the outer bottom surface of the outer pot 7, and in the attached state, the legitimate children 77, 78 are exposed to the operation port 30 of the switch panel 29.

In other words, the mounting angle 75 is fixed to the mounting surface 80 formed on the outer bottom surface of the outer pot 7 with a thread (not shown) that is inserted through the through hole 76 and screwed onto the outer pot 7.

The fixed contact plate 71 and the movable contact plate 72 constitute a rice cooking switch to be described later, and the fixed contact plate 71 and the movable contact plate 73 constitute a power switch to be described later.

The inner lid 3 closes the opening by bringing its outer peripheral edge into close contact with the opening step of the inner pot 2, and is curved upward so that the center is higher as shown in FIG.

The reason for this curve is to prevent the inner lid 3 from curving downward and lifting the periphery when the temperature inside the inner pot 2 drops and the internal pressure drops after rice cooking is completed. Lid 3
This prevents hot air and steam from escaping from the periphery.

In addition, the inner lid 3 has a flat heat-receiving surface 81 in the center,
A retaining ring 82 is fixed to surround the heat receiving surface 81.

This retaining ring 82 is partially equipped with a locking means consisting of a locking body 83 that can freely appear and retract from the heat-receiving surface 81 and a spring 84 that always biases the locking body in the outward direction.

Furthermore, the inner lid 3 has a mounting surface 85 formed at a position closer to the side than the heat receiving surface 81, and a valve hole 86 is formed in the center of this mounting surface 85, and a steam cylinder is formed surrounding the valve hole 86. 87
erected.

This steam cylinder 87 is fixed to the inner lid 3 so as to form a small gap between the lower end and the upper surface of the inner lid 3, that is, the mounting surface 85. It is equipped with a ball valve 88 that opens and closes.

The mounting surface 85 is flat so that the steam cylinder 87 can be vertically installed.

The outer lid 4 consists of a lid main body 89, a lid cover 90 in which a heat insulating material (not shown) is inserted between the main body 89, and a handle cover 91, and a lid hinge 92 fixed to one side is attached to a hinge receiver. By rotatably supporting the inner cover 10 with a shaft 93, the upper part of the inner cover 3 can be opened and closed.

In addition, a latch metal fitting 94 is fixed to the outer lid 4 at a position opposite to the lid hinge 92, and a latch lever 96 is rotatably supported on the latch metal fitting 94 with a shaft 95, so that the tip of the latch lever 96 is rotated. The operation button 97 of the latch lever 96 penetrates through the handle cover 91 and projects outward.

The lid cover 90 has a center portion bulged upward to form an assembly storage portion 98 on the lower surface, that is, the inner surface thereof, and a heat transfer assembly 99 is disposed in the storage portion 98.

The heat transfer assembly 99 has a cylindrical shape and has an assembly main body 10 whose interior is divided into an upper chamber 102 and a lower chamber 103 by a partition wall 101.
0, a thermistor 104 acting as a heat-retaining heater housed in the lower chamber 103 of the main body 100, and the lower chamber 103
and a heat transfer plate 105 that closes the opening on the lower surface and holds the thermistor 104.

The assembly main body 100 has two through holes 106 formed in the partition wall 101 at an interval of 180° from each other, and a fitting portion 107 of, for example, a hexagonal nut, at the end of the through hole 106 on the upper chamber 102 side. Form.

Therefore, the thermistor 10 is placed in the lower chamber 103 of the assembly main body 100.
4 is housed, the heat exchanger plate 105 is attached through the through hole 106 with a screw 108 that is screwed into a hexagonal nut (not shown) in the fitting part 107.

Further, a thermistor 10 is installed on the partition wall 101 of the assembly main body 100.
Terminal hole 109 for allowing the terminal No. 4 to emerge to the upper chamber 102 side
, and an arcuate rib 110 is provided protruding from the outside of the terminal hole 109 on the upper chamber 102 side.

Further, a pair of upper and lower flanges 111 are formed at the upper end of the outer peripheral surface of the assembly main body 100, and an annular packing 112 is fitted between the upper and lower flanges 111.

As shown in FIG. 18, this annular packing 112 has a seal portion 113 projecting obliquely downward on the outer periphery of the upper end.

The heat transfer assembly 99 is fitted into the assembly storage portion 98 of the lid cover 90 so as to be able to move up and down, and is held in this fitted state by a retainer ring 114 attached to the lid cover 90.

Also, in this state, the heat transfer assembly 99 is located on the outer periphery of the rib 110 and has a spring 13 compressed between it and the lid cover 90.
2, it is always urged downward, that is, in the protruding direction.

On the other hand, a lead wire to be connected to the terminal of the thermistor 104 is wired through a connection port 115 formed in the upper wall of the assembly housing portion 98 and biased toward the hinge side.

Here, the advantages associated with the shape of the annular packing 112 will be described.

Since the seal portion 113 of the annular packing 112 protrudes diagonally downward, it is very easily deformed, and the resistance is small when the heat transfer assembly 99 is inserted into the assembly storage portion 98 and moved up and down.
The fitting operation can be easily performed and the vertical movement is smooth, and the elastic contact of the seal portion 113 with the wall surface of the assembly storage section 98 is ensured, and moisture intrusion into the heat transfer assembly 99 is ensured. It can be prevented.

The presser ring 114 is attached to the assembly storage part 9 of the lid cover 90.
Three through holes 117 are formed opposite to the three screw holes 116 formed around the screw hole 116 at intervals of 120°, and the screw 11 is inserted through the through holes 117 and screwed into the screw hole 116.
8 is fixed to the lid cover 90.

A rotation preventing means is interposed between this presser ring 114 and the assembly main body 100.

This anti-rotation means is composed of a plurality of ribs 119 formed vertically on the outer peripheral surface of the assembly main body 100, and a groove 120 formed on the inner peripheral edge of the presser ring 114 opposite to the ribs 119. All the ribs 119 and grooves 120 fit together only at one location in the circumferential direction.

That is, when all the ribs 119 and the grooves 120 are fitted together, the assembly main body 100 and the presser ring 114 are always in a constant positional relationship, and the rotation preventing means is fixed to the assembly main body 10.
In other words, it also functions to position the heat transfer assembly 99.

Therefore, by marking both the lid cover 90 and the retaining ring 114 and determining in advance the through holes 117 that match the respective screw holes 116, when the outer lid 4 is opened around the shaft 93, The heads of the screws 108 and 118 that appear can be arranged in an orderly manner as shown in Figure 19, and the screws 1
Although 08 and 118 are exposed, the appearance can be made relatively good.

In FIG. 19, arrow A indicates the latch side, and arrow opening indicates the hinge side.

Of course, since the heat transfer assembly 99 is prevented from rotating, the internal lead wires will not be twisted.

Thus, the inner cover 3 is removably fitted to the lower end of the heat transfer assembly 99 attached to the outer cover 4 as described above.

A locking protrusion 121 is formed on the outer periphery of the flat end of the assembly main body 100 to engage with the locking body 83 when the retaining ring 82 of the inner lid 3 is fitted to the lower end. Locking protrusion 121
Attach the inner cover 3 to the outer cover 4 side.

In this attached state, the heat transfer plate 105 and the heat receiving surface 8
1 comes into contact with the thermistor 104 and transfers the heat from the thermistor 104 to the inner lid 3.

In addition, a steam cylinder 8 is provided on the lid main body 89 and the lid cover 90 of the outer lid 4.
7 pass through and protrude outward through guide tubes 122 and 123, respectively.

A flange 124 extending inward is formed on the opening edge of the guide tube 122 of the lid main body 89, and the flange 124 allows the steam tube 87 to
This is to make the gaps around the area appear as small as possible.

Therefore, even if the inner diameter of the guide tubes 122, 123 is increased, a large gap will not be created around the steam tube 87 on the outer surface, and the guide tubes 122, 123 will not have large gaps around the steam tube 87.
By making the inner diameter of the inner cover 3 larger, even if the steam cylinder 87 is slightly inclined when attaching the inner cover 3, it can be easily inserted into the guide cylinders 122 and 123.
3. There is also less risk that the attachment part to the inner lid 3 will break due to it hitting the wall.

The heat-retaining rice cooker is constructed as described above, and its electric circuit is shown in FIG. 21.

That is, a rice cooking circuit that is connected to a power source and is made up of a series circuit of a rice cooking heater 53, a rice cooking switch 125, a power switch 126, and a temperature fuse 127, a series circuit of a thermal reed switch 47, a heat retention heater 42, a heat retention heater 44, and a thermistor. 104 connected in parallel to each other and connected in parallel to the rice cooking switch 125 via a current fuse 128, and a series circuit of the rice cooking heater 41 and the thermal reed switch 64. A rice cooking display circuit having a cooking circuit connected in parallel to the series circuit of the switch 125, a rice cooking lamp 129 connected in parallel to the rice cooking heater 53, and a heat retention display having a heat retention lamp 130 connected in parallel to the heat retention circuit. The circuit and a cooking indicator circuit having a cooking lamp 131 connected in parallel to the cooking heater 41 form an electric circuit of a heat-retaining rice cooker.

Incidentally, each of the lamps 129, 130, 131 is arranged in each display hole 31 of the switch panel 29.

The thermal reed switch 47 controls the supply of electricity to the warming heater 42 to keep the cooked rice at a temperature suitable for keeping it warm.

Further, the thermal reed switch 64 is closed at a predetermined temperature or higher to cause the rice finishing heater 41 to perform uneven heating at a high temperature after rice cooking is completed.

As described above, according to the cooking device of the present invention, rotation of the heat transfer assembly with respect to the outer cover is prevented, and accidents such as wire breakage are eliminated by eliminating twisting of the lead wire of the heater built into the assembly. Moreover, since the heat transfer assembly and the retaining ring are securely held in a predetermined relationship by the anti-rotation means, by positioning the retaining ring when attaching it to the outer cover, the heat conductive assembly can be adjusted in consideration of the wiring of the lead wires, etc. This makes it possible to place the outer lid in the most favorable condition, making it extremely excellent in practice.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of the cooking device according to the invention, Fig. 2 is a bottom view of the top and bottom lid, Fig. 3 is a sectional view of ABCDEFGHIJ in Fig. 2, and Fig. 4 is a configuration explanation showing the mounting structure of the cord reel. Fig. 5 is a sectional view showing the terminal storage part of the upper bottom cover,
Fig. 6a is a front view of the same switch panel as above, Fig. 6 is a sectional view along line AA of Fig. 6a, Fig. 7 is a plan view of the same outer pot as above, Fig. 8
The figure is a cross-sectional view of ABCODEFGH in Fig. 7, Fig. 9 is a configuration explanatory diagram showing the tightening structure of the heater for cooking and keeping warm, Fig. 10 a, l) is a plan view and a longitudinal sectional view of the heater angle as above, Figures 11a and 11) are side and bottom views showing the switch mechanism assembly, Figures 12 and 13 are bottom views and sectional views of the inner lid, and Figures 14 and 15 are the upper cover. 16a, cross-sectional views at different positions showing
, l) and c are a plan view, left half cross-sectional side view and bottom view of the assembly body, Figures 17a and l) are a plan view and cross-sectional view of the right half of the presser ring, and Figure 18 is a FIG. 19 is an explanatory diagram showing the installed state of the heat transfer assembly, FIG. 20 is a sectional view showing a part of the main body of the upper lid, and FIG. 21 is an electric circuit diagram of the same. . 1: Vessel body, 2: Inner pot, 3: Inner lid, 4: Outer lid, 98: Assembly storage section, 99: Heat transfer assembly, 104: Thermistor (thermal heater), 114: Presser ring, 119: rib, 1
20: Cut groove, 132 spring.

Claims (1)

[Scope of utility model registration request] A container body, an inner pot that can be moved in and out of the container body, an outer lid that closes the opening of the container body, an assembly storage part formed at the center of the inner surface of the outer lid, and a container that can be moved up and down inside the storage part. a heat transfer assembly that is fitted into a housing and has a built-in heater; a retaining ring that is fitted onto the outer periphery of the assembly and attached to the inner surface of the outer lid to hold the heat transfer assembly within the assembly housing; The heat transfer assembly has a spring that is compressed between the assembly storage parts and always urges the heat transfer assembly downward, and an inner lid that is detachably attached to the lower end of the heat transfer assembly and closes the opening of the inner pot. A cooking appliance characterized in that a rotation preventing means is interposed between the assembly and the presser ring at one position in the circumferential direction of the assembly to allow insertion and insertion of the two and to prevent the heat transfer assembly from rotating.