JP2638455B2 - Rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker, and more particularly to a rice cooker in which an inner pot is provided with a lid for opening and closing the mouth of the inner pot and the inner pot. It is about.

[0002]

2. Description of the Related Art In a rice cooker, rice cooked in an inner pot is heated slightly from the surroundings to keep the temperature warm, so that the rice is kept warm.

When the rice is kept warm from the surroundings, if a temperature difference is generated, steam condenses on the low-temperature portion, and the condensed water locally wets the rice in the inner pot to make it sticky or whiten, which is preferable. Absent.

Accordingly, Japanese Patent Application Laid-Open No. 49-9367 discloses
An arm that is pivotally supported on one side of the container housing the inner pan, a lid that is detachably supported on the arm and that opens and closes the mouth of the container, and a lid heater provided on the arm. With
It discloses a structure in which a steam passage is provided between an arm body and a lid to allow steam in an inner pot to escape to the outside.

[0005]

However, in the above configuration, since there is a steam passage between the arm body and the lid, the outside air reaches the peripheral portion of the inner lid during heat insulation, and the temperature of this portion is changed by the outside air. It is robbed and causes temperature unevenness with the central portion of the inner lid with which the lid heater of the arm abuts. Further, since the lead wires of the arm body and the lid heater need to extend to the center of the lid body, the structure formed by the lid body and the inner lid is further complicated.

According to the present invention, a rice cooker is provided in which a lid can be attached to and detached from a body with a simple lid structure and a lid heater is employed to prevent temperature unevenness at the time of warming, thereby solving the above-mentioned conventional problems. It is an object to provide a jar.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an arm which is pivotally supported on one side of a container housing an inner pot, and which is detachably mounted on the arm. In a rice cooker provided with a lid that opens and closes the mouth of the vessel and the mouth of the inner pan, the lid has a heat sink that forms the back of the inner pan and forms the back of the lid, A lid heater provided on the arm body is brought into contact with a portion of the radiator plate near the arm body pivot, and the lid heater is provided around a steam port for allowing steam in the inner pan to escape to the outside. It is.

[0008]

According to the above construction of the present invention, both the mouth of the vessel and the mouth of the inner pan can be opened and closed by the lid which is detachably supported on the arm pivotally supported on one side of the vessel. And, if the arm heater is provided with the lid heater provided in contact with a portion of the heat sink forming the back surface of the lid body near the arm pivot portion, the arm body and the lid heater can be extended as compared to the case where the arm heater extends to the center. By making the lead wire short, there is an advantage that the lid structure including the arm body and the lead wire is simplified, cost and weight can be reduced, and the removable lid portion, that is, the round portion of the lid is increased.
A lid heater is applied to a portion of the heat sink near the arm body pivot, and a steam port is provided in a portion to which the lid heater is applied so that the steam in the inner pan is released to the outside. In addition, it is possible to prevent the heat from being taken away by the outside air to lower the temperature, and to minimize the temperature unevenness due to the influence of the outside air through the steam port.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. The opening 1a, 3a of the container 1 and the inner pot 3 can be simultaneously opened and closed by the lid 5 pivotally supported by.

The vessel 1 is formed of a metal inner case 7 and a resin outer case 8 so as to be hollow. Exterior case 8
Is formed from a bottomed main body 8a and a shoulder member 8b which are joined together by a forced fitting portion 8c, and the inner case 7 has an outer flange 7a at the upper end formed by the shoulder member 8b. 2 and is screwed with a screw 10 in a state of being fitted to the positioning projection 8d. As shown in FIG. To connect the inner case 7
Is firmly integrated with the entire exterior case 8.

In the bottom of the inner case 7, first and second hot plates 13, 1 having first and second rice cooking heaters 11, 12 are built.
The first hot platen 13 provided directly below the inner pan 3 is received at the bottom of the inner case 7 and fixed with screws 15 as shown in FIG. , A temperature sensor 16 for controlling the heat generation of the second rice cooker heaters 11 and 12 is provided by commonly attaching the screw 15, which protrudes from the upper surface of the first hot platen 13. In contact with the bottom of the inner pot 3 received on the first hot platen 13, the temperature of rice cooked by the inner pot 3 and the temperature of heat retention are detected.

The second hot platen 14 is supported on the bottom of the inner case 7 via a spring 17 so as to be able to move up and down, and its own downward projection 14a fits into the bottom hole 7a of the inner case 7 and moves up and down. While being guided, the inner peripheral edge 14b abuts on the outer peripheral edge 13a of the first hot platen 13, and the upper limit position is regulated. As a result, the second hot platen 14 is normally held at the upper limit position by the spring 17, but the first hot platen 13
When the inner pot 3 is received, the inner pot 3 is pushed down and comes into close contact with the bottom of the inner pot 3.

Here, the first and second hot plates 13 and 14 incorporate the first and second rice cooking heaters 11 and 12 separately and operate over a wide range of the bottom of the inner pan 3. , The high capacity heater concentrates on the narrow part of the bottom of the inner pot 3,
It avoids causing partial overheating and partial melting. In this case, if both the first and second rice-cooking heaters 11 and 12 provided in a wide range are built in one hot plate and brought into contact with the bottom of the inner pan 3, the influence of the warp of the hot plate becomes large. A gap is formed between the hot platen and the bottom portion of the inner pan 3 to lower the heating efficiency. However, the first and second hot platen 13 and 14 are separately built and built in to make contact with the bottom portion of the inner pan 3. Therefore, such a problem caused by the warpage of the hot plate can be solved.

However, in this case, the first and second hot plates 13,
It is difficult to obtain the positional accuracy of the attachment in which both of the members 14 properly contact the bottom of the inner pot 3. Therefore, the side of the first hot platen 13 having the built-in first rice cooker 11 for heating which is in contact with the lower surface of the inner pot 3 from directly below is fixed to the bottom of the inner case 7 as described above. Since the side of the hot platen 14 having the sub second rice cooker 12 built therein for heating from around the bottom portion of the inner pot 3 in contact with the outer peripheral portion of the bottom portion is supported so as to be able to float as described above, the floating support is provided. The structure can be simplified, and the effect of the floating support on the electrical connection can be reduced by half.

A body heater 17 for keeping heat is wrapped around the body of the inner case 7 of the container 1 to heat the inner case 7, and the inner pot 3 is moved by the radiant heat from the entire inner case 7. Heat from the bottom and around the body to keep warm. At this time, the first and second rice cooker 11, 1
2 can also be energized at an appropriate ratio to participate in heat retention. Around the body of the inner case 7 is covered by a heat insulating wall 20 from the outside of the body heater 17 so as to prevent heat from escaping to the outside during cooking and keeping the temperature.

A control board 18 is provided in the front space between the body part of the inner case 7 and the body part of the outer case 8 of the case 1, and the operation board 18 is located inside the operation panel 19 provided at the front part of the shoulder member 8b. Along with the substrate 21, various mode settings and control corresponding thereto, and control for displaying an operation state and an operation state are performed. A cord reel 25 wound up and stored so as to be able to draw out a power cord for connecting electric equipment in the body 1 to a power source in a downwardly opened concave portion 24 formed below the bottom of the outer case 8 of the body 1. Is provided.

The control board 18 and the operation board 21 are held by a resin-made control holder 22, and are attached to the lower surface of the front portion of the shoulder member 8b by screws 23 as shown in FIGS. 4 (a) and 4 (b). . On the outer periphery of the rear half of the body 1 to which the shoulder member 8b is locked, a stepped portion 81 is provided with a stepped-down handle 82, and the handle 82 is provided with an inward pivot provided integrally at both ends thereof. As shown in FIGS. 2 and 5, 82a is inserted into a bearing hole 83 of the shoulder member 8b and pivotally supported. Axis 8
A stopper piece 82b protrudes from the outer periphery of the distal end of the handle 2a so that the handle 82 can be attached to and detached from the notch 84 of the bearing hole 83 only in a predetermined rotation posture in which the handle 82 is not used. .

As shown in FIGS. 1, 5 to 9,
The body 1 is pivotally supported on one side of the body 1 by the hinge shaft 4.
An arm 31 extending toward the center of the mouth 1a of the inner pot 3; the arm 1 is integrally fitted with the arm 31 so as to be detachably supported. It is formed of a lid body 32 which is a lid according to the present invention, which is opened and closed together with the portion 3a.

At least a rear surface area of the lid body 32 facing the mouth 3a of the inner pot 3 is formed by a heat sink 34, and the arm body 31 is supported by the arm body 31 fitted with the lid body 32. FIG. 1 of the radiator plate 34 of the lid body 32
Is provided with a lid heater 37 that abuts from the outside on the portion of the arm 31 close to the pivot, and is electrically connected to the container 1 by a lead wire 36 that bypasses the pivot of the arm 31 to the container 1. The heat of the lid heater 37 is connected to the heat radiating plate 34 via the heat conductive plate 35 provided on the arm body 31, so that heat can be radiated to the entire area of the opening 3 a of the inner pan 3.

As shown in FIG. 3 and FIGS. 5 to 9, the arm body 31 has a resin upper cover 4 having a disk portion 31a at the tip end.
5 and a lower plate 43 applied to the upper cover 41 from below and attached by screws 42 as shown in FIG. 5, and a slightly smaller opening similar to the disk portion 31a of the lower plate 43. A spring which has the opening 43a and which is fitted from above so as to be able to move up and down the heat conducting plate 35, and which is supported from below by the edge of the opening 43a, and which is operated between the heat conducting plate 35 and the upper cover 41; By 44, it is urged to be always at the lowermost position. As shown in FIGS. 1, 3, and 9, the pivotal support of the body 1 by the hinge shaft 4 is a downwardly bent base of the mounting plate 43b extending rearward from the edge of the opening 43a of the lower plate 43. 43c on both sides 43d
Is carried out by clamping the hinge shaft 4 inserted between the holding arms 8e and 8f of the fixed bearing portion 8c provided on the shoulder member 8b, which is opened rearward, and the bearing lid member 8d fitted to the rear from the fixed bearing portion 8c. Along with this clamping, the rear opening of the fixed bearing portion 8c is covered.

The bearing lid member 8d fits downward projections 8g provided on the left and right sides of the lower side portion into the engaging holes 8h on the upper surface of the shoulder member 8b, and connects the tips of a pair of left and right holding arms 8f to the fixed bearing portion 8c. By being fitted into the engagement hole 8i formed at the upper end, it is securely connected to the fixed bearing portion 8c,
The arm body 31 can be pivotally supported on the container 1 stably.

An attachment portion between the upper cover 41 and the lower plate 43 of the arm body 31 by the screw 42 has an upper cover 4
1. Both ends 45a of a spring 45 wound along two inner sides of the hinge shaft 4 in a state along the inner surface of the hinge shaft 4.
As shown in FIGS. 3 and 9, a metal spring receiving plate 48 is interposed as shown in FIGS. 3 and 9, and a central projecting portion 45 b extending in a direction opposite to the opposite end portions 45 a of the spring 45 is fixed to the shoulder member 8 b. The arm 8 is urged in a direction in which the lid 5 formed together with the lid main body 32 opens by engaging the hole 8j formed in the portion where the base of the portion 8c is located. Therefore, the lid 5 is closed against the spring 45, but as shown in FIG.
In this closed state, the locking portion 32a at the front end of the lid body 32 is provided at the front of the shoulder member 8b in this closed state, and the lock lever 4 biased by the spring 47 so as to be always in the locked position is provided.
6, and the lid 5 is locked in the closed state. In this closed state, the lock lever 46 is pushed against the spring 47 and is rotated counterclockwise about the pivot 48 to unlock the lid 5. The lid 5 is automatically opened by a spring 45. In order to appropriately limit the opening speed of the lid 5 at this time, the free lower end portion 48a of the spring receiving plate 48 slides against the back of the fixed bearing portion 8c by its own spring property,
The opening operation of the lid 5 is braked.

As shown in FIGS. 1 and 3, the lead wire 36 passes through the hole 8j of the shoulder member 8b and enters the body 1 from the lid 5 side.

The lid body 32 is formed by forcibly fitting the resin upper cover 51 and the lower plate 52 together as shown in FIG.
3 and a heat insulator 54 is built in. The lid main body 32 has a concave portion 32a in which the arm body 31 is fitted from above, provided on the pivotal support side of the lid main body 32 to the container body 1. The disk portion 31a of the arm body 31 and a circular concave portion 32a1 that fits the disk portion 31a. And the fitting of the arm-shaped base 31b, which is smaller in width than the disk portion 31a of the arm 31, and the groove-shaped recess 32a2 having a width suitable for this, causes the arm 31 and the lid body 32 to move up and down. It can be attached and detached only in the direction, fits without play in the fitted state,
The heat conduction plate 35 is provided with the opening 4 of the lower plate 43 of the arm-shaped base 31b.
3a and the heat sink 34 through the bottom opening 32a3 of the circular recess 32a1 formed by the upper plate 51 of the lid body 32. A seal packing 84 is provided between the openings 43a and 32a3, and is attached to the edge of the opening 32a3.

As shown in FIG. 8 (a), the fitting state is such that the engagement recess 54 provided at the front side of the disk portion 31a, which is the free end of the arm 31, as shown in FIG. The engagement with the engagement protrusion 55 provided on the inner peripheral portion of the circular concave portion 32a1 and the protrusion and retreat on both side surfaces of the arm-shaped base portion 31b of the arm body 31 as shown in FIGS. Lock member 5 provided and biased by spring 56 in the protruding direction
7 and engaging recesses 58 provided on the inner surfaces on both sides of the groove-shaped recess 32a2.
The arm 31 and the lid main body 32 are firmly integrated as one lid 5 by being locked by the engagement at the front, rear, left, and right three positions.

The lock is released by releasing the engagement of the left and right lock members 57 with the engagement recesses 58, so that the lid body 32 can be separated from the arm body 31. For this separation, each of the left and right lock members 57 is formed with an operation portion 57a facing the hole 59 on the upper surface of the arm body 31. The left and right operation portions 57a can be operated so as to be sandwiched between both sides with fingers. Can be unlocked.

However, as shown in FIG. 10, the lid main body 32 is turned around the engaging portion as a fulcrum in the direction of the arrow in FIG. By moving, the circular concave portion 32a1 and the groove-shaped concave portion 32a2 are fitted to the disk portion 31a and the lever-shaped base portion 31b of the arm body 31 from below. By the urging, the lock body is automatically engaged with the engagement concave portion 58 to be in the above-mentioned locked state, and the lid body 32 is firmly integrated with the arm body 31. The mouths 1a and 3a of the inner pot 3 are simultaneously opened and closed.

In order to remove the lid main body 32 from the arm body 31, after the lock by the lock member 57 is released as described above, the lid main body 32 is disengaged from the engaging projection 55 and the engaging concave part 5.
The circular concave portion 32a1 and the groove-shaped concave portion 32a2 can be connected to the disk portion 31a and the arm-shaped base portion 31b of the arm body 31 by rotating the engagement portion 4 with the support member 4 in a direction opposite to the arrow. Since the fitting is released as shown in FIG. 10, the lid body 32 can be removed from the arm body 31.

As shown in FIGS. 1 and 4, the lid body 32 has an opening 52a at a portion of the lower plate 52 facing the mouth 3a of the inner pot 3, and the heat sink 34 is fitted into the opening 52a. The opening 52a and the heat sink 34 are attached by screws 62.
An annular seal member 63 is sandwiched and held at the boundary between the heat sink 3 and the heat sink 3 when the cover member 5 is in the closed state and the lid member 5 is in contact with the edge of the opening 3 a of the inner pan 3.
4 is configured so that the mouth 3a of the inner pan 3 is closed. At this time, the lid main body 32 covers the mouth 1a of the body 1 and approaches the shoulder member 8b so as to form a predetermined gap. It becomes a closed state in which it is covered in a state where it is closed.

Opening and closing of the lid 5 and the lid body 32
By utilizing the fact that the arm body 31 remains pivotally supported by the vessel body 1 even after removal, the lid heater 37 and the body body 1 are connected to each other by the fixed bearing portion 8c and the hinge shaft 4. A lead wire 36 bypassing the pivot portion 31 and passing through the hole 8j
Electrically connected to each other, so that the electrical connection does not affect the opening and closing of the lid 5 and the removal of the lid main body 32.

In the above-described configuration of the present embodiment, the container 1
The lid 5 is fitted to an arm 31 pivotally supported on one side by a hinge shaft 4 and extending toward the center of the mouth 1a of the container 1 so that the lid main body 32 can be attached and detached. Due to the formation, the arm 31 and the lid main body 32 are integrally pivotally supported by the container 1, and the entire mouth 1a of the container 1 is covered so as to be opened and closed together with the mouth 3a of the inner pan 3, Vessel 1
The opening and closing of both the mouth 1a and the mouth 3b of the inner pot 3 can be performed at the same time.

Further, in a state where the lid main body 32 and the arm body 31 are integrated, a heat conductive plate 35 which forms the lower surface of the disk portion 31a of the arm body 31 and has a lid heater 37 attached to the upper surface thereof is provided.
The arm body 31 extends toward the center of the mouth 1a of the body 1 on the upper surface of the heat sink 34 provided at least at the portion of the lid main body 32 which faces and closes the mouth 3a of the inner pot 3. The heat from the lid heater 37 is supplied to the rice in the inner pot 3 from the substantially central portion or a portion close to the lid 5 via the heat radiating plate 34 in contact with a position near the center of the lid 5. As a result, the temperature can be maintained evenly by uniform heating from above as in the case of the conventional lid heater, thereby preventing dew condensation.

Further, while the arm 31 provided with the lid heater 37 is pivotally supported by the container 1, the electrical connection structure of the lid heater 37 to the container 1 can be simplified. The lid body 32, which constitutes most of the lid body 5 including the area where the tongue adheres and is opposed to the opening 3 a of the lid body 3, is removed from the arm body 31.
It can be handled independently and washed in a circle without being affected by the presence of the lid heater 37 provided on the side and its electrical connection structure with the container 1 side. Therefore, it is easy to keep the whole area including the partial area where rice and the like generated by cooking rice in the inner pot 3 adheres clean.

In particular, both the mouth 1a of the body 1 and the mouth 3a of the inner pan 3 can be opened and closed by the lid body 32 which is detachably supported on the arm 31 pivotally supported on one side of the body 1. And the arm body 31 is provided with a lid heater 3 provided thereon.
7 is brought into contact with a portion of the heat sink 34 that forms the back surface of the lid body 32 near the pivot portion of the arm body 31, the lead wire 36 of the arm body 31 and the lid heater 37 is smaller than when extending to the center. By being short, the arm body 31
And the lid body 3 including the lead wires 36 can be simplified, cost reduction and weight reduction can be achieved, and the removable lid body 3
There is an advantage that the two parts, that is, the round part of the lid 5 are increased.

In this embodiment, as shown in FIGS. 1, 3 and 8, the heat sink 34 of the lid main body 32 passes through the center of the disk portion 31a of the arm body 31 upward, and the inner pot 3 Is provided so that the heat conducting plate 35 is positioned around the steam port 72 together with the lid heater 37 thereon so that the steam can escape to the outside. Since the heat of the lid heater 37 is transmitted in contact with the portion where the steam port 72 is provided, the steam port 72 of the lid 5 is locally affected by the outside air passing through the steam port 72. It is easy to prevent the temperature from dropping, and it is possible to guarantee the uniform heat retention and to avoid the occurrence of dew condensation. Further, the front end of the lid 5, that is, the lid body 32
A drain port 73 for discharging a drain that may accumulate between the upper cover 51 and the lower plate 52 is provided as shown in FIG.

In particular, a portion of the radiator plate 34 near the pivotal portion of the arm 31 is covered with a lid heater 37, and the lid heater 37 receives the heat of the lid heater 37 more easily than the opposite side. A steam port 72 is provided in the portion to which the steam is applied so that the steam in the inner pot 3 is released to the outside,
It is possible to prevent the heat from being taken away by the outside air and to prevent the temperature from lowering, and to minimize the temperature unevenness due to the influence of the outside air through the steam port 72.

[0037]

According to the present invention, both the mouth of the body and the mouth of the inner pan can be opened and closed by the lid which is detachably supported on the arm body pivotally supported on one side of the body. When the lid heater provided on the arm body is brought into contact with a portion of the heat sink that forms the back surface of the lid body near the arm pivot portion, the lead of the arm body and the lid heater is extended as compared with the case where it extends to the center. By making the wire short, there is an advantage that the lid structure including the arm body and the lead wire can be simplified, the cost and the weight can be reduced, and the removable lid portion, that is, the round portion of the lid can be increased. Also,
A cover heater is applied to a portion of the heat sink near the arm body pivot, and a steam port is provided in a portion to which the cover heater is applied so that the steam in the inner pan is released to the outside. Prevents heat from being deprived of heat and lowering the temperature,
Temperature unevenness due to the influence of outside air through the steam port can be minimized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rice cooker according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a half part of the rice cooker of FIG. 1 shown in a different direction from FIG. 1;

FIG. 3 is a cross-sectional view showing a lid pivoting portion of the rice cooker of FIG. 1;

FIG. 4 is a cross-sectional view showing a lid lock portion of the rice cooker of FIG.

FIG. 5 is a cross-sectional view showing a pivotal portion of a handle of the rice cooker of FIG. 1;

FIG. 6 is a perspective view showing an appearance of the rice cooker of FIG. 1;

FIG. 7 is a plan view excluding a part of the rice cooker of FIG. 1;

8 is an exploded perspective view and a partial sectional view of a lid of the rice cooker of FIG. 1;

FIG. 9 is an exploded perspective view of a pivot portion of the lid of the rice cooker of FIG. 1;

FIG. 10 is an explanatory view of a lid body attaching / detaching operation of the lid of the rice cooker of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument body 3 Inner pot 1a, 3a mouth part 4 Hinge axis 5 Lid body 31 Arm body 32 Lid body 34 Heat sink 35 Heat conductive plate 36 Lead wire 72 Steam port

Claims (1)

(57) [Claims] Claims: 1. An inner pot is accommodated in one side of a container body .
The arm is supported so that it can be attached to and detached from this arm.
Te unit body mouth and of a lid member for opening and closing the mouth of Uchinabe
In the rice cooker, the heat dissipation plate forming a lid, the lid of the inner bowl to form a rear surface of the lid
The provided a lid heater provided in the arm body, the heat radiating plate A
Abutting the part near the pivoting body, and the lid heater is
A rice cooker characterized by being provided around a steam port for allowing steam inside to escape to the outside .