JPH0588416U - Electric rice cooker - Google Patents

Abstract

(57) [Summary] [Purpose] The structure, assembly, and disassembly are simple and convenient for repairing and replacing the operation panel. [Structure] The storage box 61 is attached to the operation panel 37.
A seal packing 93 is formed integrally with the shoulder member 14 so as to open toward the side, and the lead wire outlet 91 of the storage box 61 closes the lead wire outlet 91.
Through this seal packing 93, the operation unit circuit board 62
The lead wire 78 is drawn out of the storage box 61.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric rice cooker, and more particularly to an electric rice cooker in which an operation panel is provided on a shoulder member of a body and a storage box for accommodating an operation unit circuit board is arranged on the back side of the operation panel.

[0002]

[Prior Art]

 Some electric rice cookers have an operation panel on the shoulder of the body. In recent years, the operation panel has been flattened, and various operation units and display units have been provided on the operation panel so as to be flush with each other.

Therefore, on the back surface of the operation panel, various switches operated by a flat and flush operation section, or an operation section in which a lamp or an element for illuminating a flat and flush display section is mounted A circuit board is arranged.

By storing this operation part circuit board in a storage box as a unit, it is possible to simplify the assembly into the body and to keep it safe from heat, water, dust, etc. Was thought.

By the way, a peripheral wall of the container body is formed to be hollow, and various electric devices and circuits are housed therein in order to insulate the inner pan housing portion from the outside. The storage box is one of them, and like the others, it is inserted from the opening provided at the bottom of the body and assembled by screwing or the like.

[0006]

[Problems to be solved by the device]

 However, the space inside the body of the body is narrow and the depth from the bottom to the back of the shoulder member is almost equal to the height of the body.

For this reason, it is difficult to insert the storage box into the back side of the shoulder member and fasten it with a screw, and the workability is poor.

Also, it is difficult to remove the operation part circuit board after assembly as in the case of mounting and it is necessary to attach and detach a large bottom member, which is inconvenient for repair and replacement.

Therefore, the present invention simplifies the assembly structure in which the operation unit circuit board is housed in the storage box and is located on the back side of the operation panel without impairing the isolation from the others necessary for the storage box. The problem is to provide an electric rice cooker that can solve such problems.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the electric rice cooker in which an operation panel is provided on the surface of the shoulder member of the body, and a storage box for storing the operation unit circuit board is arranged on the back side of the operation panel, the storage box Is integrally formed on the shoulder member so as to open to the side of the operation panel, and a seal packing for closing the lead wire outlet is provided at the lead wire outlet of the storage box, and the seal of the operation unit circuit board is provided through this seal packing. It is characterized in that the lead wire is drawn out of the storage box.

[0011]

[Action]

 According to the above configuration of the present invention, since the storage box is formed integrally with the shoulder member of the body, the mounting of the storage box can be omitted and the number of parts to be handled can be reduced.

The storage box has an opening on the side of the operation panel provided on the surface of the shoulder member, so that the operation section circuit board can be directly inserted and removed from the outside of the body with the operation panel removed, and It can be screwed in and released from it, and the operation part circuit board stored in the storage box and attached is directly exposed to the back side of the operation panel provided on the surface of the shoulder member. It is possible to satisfy the required positional relationship between them.

[0013]

【Example】

 Hereinafter, an electric rice cooker as an embodiment of the present invention will be described with reference to FIGS.

The electric rice cooker of the present embodiment has a body 3 including an outer case 1 made of metal and an inner container 2 made of metal, as shown in FIGS. 3 includes a metal rice cooker 4 and a container cover 6 made of resin, which is pivotally attached to a rear portion of the container 3 by a hinge pin (not shown) so as to be openable and closable.

A hot platen 8 in which a rice cooking heater 7 is embedded is applied to the upper surface of the bottom of the inner container 2 of the body 3 and is attached by screws 9. Rice is cooked by placing the rice cooking pot 4 on the heating plate 8 and heating it. Further, a center sensor 12 is provided in the central hole 11 of the heating plate 8 so as to be pressure-bonded to the bottom of the rice cooking pot 4 placed on the heating plate 8 by a spring (not shown). To sense. A heat-retaining heater 13 is attached to the outer peripheral surface of the body of the inner container 2 so that the rice in the rice cooking pot 4 is warmed from around the rice cooking pot 4 via the inner container 2 to keep it warm. The outer case 1 and the inner container 2 are connected to each other by a shoulder member 14 made of resin, and the heat of the inner container 2 is suppressed from being conducted to the outer case 1.

An inner lid 15 made of metal is provided inside the body lid 6 so as to close the opening of the rice cooking pot 4. The vessel lid 6 has a hollow structure made of resin, and has a steam vent 16 at the center. A perforated flange 17 is attached to the upper opening of the steam outlet 16. A steam vent port 18 is provided in the peripheral portion of the inner lid 15, and a resin-made pressurized steam vent pipe 19 provided on the central upper surface of the inner lid 15 is provided so as to face the outside from the center of the perforated flange 17. A steam vent 118 is also provided on the peripheral wall of the base of the pressurized steam vent pipe 19. The pressurizing vapor vent pipe 19 also has a downward annular step 19a at the upper end of its outer periphery elastically engaged with an inner peripheral projection 22a of an annular seal packing 22 mounted on the inner periphery of the lower portion of the vapor vent 16. The inner cover 15 is detachably connected to the steam outlet 16 so that the inner cover 15 is detachably supported by the body cover 6 and is opened and closed integrally with the body cover 6. The pressurized steam removing pipe 19 has a pressure adjusting hole 21 so that the steam leaving the steam removing ports 18 and 118 can be directly supplied to the outside or through the perforated flange 17 while keeping the inside of the rice cooking pot 4 at a predetermined pressure. discharge.

The seal packing 22 has a seal lip 22 b which is pressed against the shoulder portion 19 b of the pressurized steam vent pipe 19, and the pressurized steam vent pipe 19 is inserted into the steam vent port 16 to attach an inner lid to the body lid 6. When the body lid 6 is closed and the inner lid 15 comes close to the body lid 6 with the 15 attached, the degree of crimping to the shoulder portion 19b is increased so that the steam vent port 16 and the pressurized steam vent pipe 19 are connected to each other. The gaps are firmly sealed to prevent steam and oneva from entering between the vessel lid 6 and the inner lid 15, and the inner lid 15 is easily pressed against the rice cooking pot 4. A seal packing 23 is provided in a portion of the inner lid 15 which is crimped to the rice cooking pot 4. The vessel lid 6 is provided with a seal packing 24 located at the back of the portion of the inner lid 15 that is crimped to the rice cooking pot 4, and pressing the inner lid 15 toward the rice cooking pot 4 side, together with the seal packing 22, the vessel lid 6. The reflector plate 25 applied to the inner surface of the plate 6 holds it between the cover 6 and the body cover 6. The seal packing 24 presses the inner lid 15 downward against the body lid 6 and press-fits it to the rice cooking pot 4 at a predetermined pressure at the portion of the seal packing 23.

The body lid 6 is urged in the opening direction by a spring (not shown) that is exerted between the body lid 6 and the body 3 around the pivot portion.

Correspondingly, a stopper 34 biased so as to project to the inner circumference of the body 3 is provided at a portion of the shoulder member 14 facing the free end which is the front portion of the body lid 6. It is provided so that the body lid 6 can be locked in the closed state.

For this locking, an engagement recess 35 facing the stopper 34 is provided on the side peripheral surface of the free end portion of the body lid 6, and when the body lid 6 is closed, the engagement recess 35 is formed. It engages with the stopper 34, and the body lid 6 is locked in the closed state by the stopper 34. The operation button 36 of the stopper 34 is provided on the shoulder member 14 so as to be exposed in the vicinity of an operation panel 37 provided upward on the front portion of the shoulder member 14, and when the operation button 36 is pushed down, the stopper 34 is released. By retracting and unlocking the body lid 6, the body lid 6 is automatically opened by the biasing of the spring.

The shoulder member 14 is made of a general-purpose resin such as polypropylene or ABS resin. On the upper surface of the shoulder member 14, as shown in FIG. 1, a shoulder ring 38 made of heat-resistant resin such as nylon or engineering resin is used. A shoulder heater 39 is provided via the.

The inner lid 15 extends further outward from the pressure contact with the rice cooking pot 4, and is pressed against the upper surface of the shoulder heater 39 to receive heat conduction. At the time of heat retention, the heat retention heater 13 and the shoulder heater 39 are operated and the rice cooking heater 7 is used at a low temperature. However, since the heat of the shoulder heater 39 is mainly conducted to the inner lid 15, the three heaters are used. It is possible to heat the rice in the rice cooking pot 4 from around it uniformly to keep it warm.

A bottom member 51 made of resin is attached to the lower end of the outer case 1 in a forcefully fitted state. A downward recess 52 is provided in the rear half of the bottom member 51, and a cord reel 53 for storing a power supply code is provided in the recess 52. A downward-facing circuit box 54 is integrally formed in the front half of the bottom member 51, and houses a power circuit board 55.

The entire lower surface of the bottom member 51 is closed by a lid plate 56 made of metal.

At the front part of the body 3 in which the operation panel 37 is provided on the shoulder member 14, the space between the outer case 1 and the inner container 2 is designed to be larger than the others, and thereby the required size is obtained. The operation panel 37 has a sufficient area to form the operation surface.

A storage box 61 made of resin is provided by utilizing the space on the back side of the operation panel 37, and is arranged opposite to the back side of the operation panel 37 so as to perform various operations and display of these operations and operations related to the operations. The operation box circuit board 62 for displaying the above state and the control circuit board 71 on which a microcomputer for controlling the operation is mounted are housed in the housing box 61.

As a result, the complicated circuit configuration is integrated in the storage box 61, the wiring inside the body 3 is simplified, and the heat effect from the rice cooking heater 7 is mitigated, which is safe.

The storage box 61 is formed integrally with the shoulder member 14 as shown in FIGS. 1 and 6, and the opening 61 a faces the back side of the operation panel 37. Then, the operation panel 37 is fitted to the step portion 61b at the edge of the opening 61a and fixed by the screw 72. On the surface of the operation panel 37, a seat cover 101 showing an explanation of the operation unit and the display unit is attached.

As shown in FIG. 6, the operation panel 37 has a main display window 73 into which a liquid crystal display member 81 for displaying necessary information such as time and setting menu is fitted, and menu setting, rice cooking, input of heat retention / cancellation, It has various keys 74 for setting the timer and the like, and various display windows 75 for displaying that the timer is being set, rice is being cooked, or heat is being kept, depending on various setting modes and operating conditions.

The operation panel 37 is made of a flexible resin, the key 74 is located in the operation hole 37a of the operation panel 37, and is integrated with the operation panel 37 through a thin and thin resin spring portion 37b. It is formed so that it can be pressed.

As shown in detail in FIGS. 4 and 5, the main display window 73 of the operation panel 37 has a support edge 37c on the front side of the window edge and an L-shaped support piece 37d on the back side of the short side window edge. The display member 81 is fitted between the support edge 37c and the support piece 37d so that the display member 81 can be supported. In this concrete work, first, one end of the display member 81 is sandwiched between the support edge 37c and the one support piece 37d on the back side of the main display window 73 as shown in phantom in FIG. Next, when the other end of the display member 81 is pressed in the direction of the arrow to temporarily push away the other support piece 37d, it is fitted between the other support piece 37d and the support edge 37c which is elastically restored after being pushed away. finish.

The operation circuit board 62 is attached to the projection 37e formed on the back surface of the operation panel 37 with a screw 63 and faces the operation panel 37 at a predetermined positional relationship and at a predetermined interval.

Various switches 64 facing the various keys 74, a light emitting diode 65 as a display lamp facing the various display windows 75, an adjusting resistor 66, and the like are mounted on the operation circuit board 62 by a printed circuit (not shown). It is connected to the lead wire 68.

The lead wire 68 is connected to an operation control circuit mainly composed of the microcomputer 76 on the control circuit board 71 through a print circuit (not shown) formed on the control circuit board 71.

The control circuit on the control circuit board 71 is also connected to the display member 81 via a lead wire 77, and the lead wire 78 is drawn out of the storage box 61, so that the power supply circuit board 55 and other Makes the necessary electrical connections to and from.

As shown in FIG. 6, the control circuit board 71 receives the lower edge of the support recesses 82 formed in the bottom two places of the storage box 61 and faces both sides of the main display window 73 of the operation panel 37. The pair of pressing recesses 83 provided on the upper side of the storage box 61 are sandwiched from above and below by being fitted from above, and are held in contact with the vertical ribs 84 provided on the left and right of the inner surface of the back wall of the storage box 61.

As a result, the control circuit board 71 is stabilized in the storage box 61.

A drawer hole 91 for drawing the lead wire 78 to the outside is formed on the bottom wall of the storage box 61, and a recess 92 a surrounded by a peripheral wall 92 is formed on the lower surface around the drawer hole 91. A pair of seal pads 93 are formed in the recess 92a such that their joints 93a cross the central portion of the extraction hole 91, and the lid member 95 is applied to the opening end of the recess 92a. The seal pad pair 93 is attached to prevent the seal pad pair 93 from coming off.

The lead wire 78 is drawn out to the outside through the seam 93 a in the pressure contact state of the seal pad pair 93 in addition to the drawing hole 91. As a result, the lead-out portion of the lead wire 78 is sealed by the seal pad pair 93, and the isolation from the rest of the storage box 61 is guaranteed. Therefore, the operation circuit board 62 and the control circuit board 71 can be sufficiently protected from heat, water, and humidity.

Although the storage box 61 exhibits sufficient isolation as described above, the storage box 61 has an opening on the upper surface of the shoulder member 14, so that the operation panel 37 can be simply removed. The operation circuit board 62 and the control circuit board 71 can be directly attached / detached, and the work of attachment / detachment can be performed immediately.

[0041]

[Effect of the device]

 According to the present invention, since the storage box is formed integrally with the shoulder member of the body, the mounting of the storage box can be omitted and the number of parts to be handled can be reduced. By opening on the operation panel side provided on the surface, it is possible to directly insert and remove the operation circuit board from the outside of the body with the operation panel removed, and to perform screwing and release from the closest position. In addition, the operation part circuit board stored in the storage box and attached can be directly exposed to the back side of the operation panel provided on the surface of the shoulder member to satisfy the required positional relationship with the operation panel. As a result, the structure, assembly, and disassembly can be simplified, which is inexpensive and convenient for repairing and replacing the operation circuit board.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a substantially half portion of an electric rice cooker showing an embodiment of the present invention.

2 is a plan view of the rice cooker of FIG. 1. FIG.

FIG. 3 is a cross-sectional view of an operation panel unit.

FIG. 4 is a cross-sectional view showing a procedure for attaching the display member to the main display window portion of the operation panel.

FIG. 5 is a perspective view of the main display window section as viewed from the back side.

FIG. 6 is an exploded perspective view showing an operation panel attachment portion of the body.

[Explanation of symbols]

 3 Instrument body 37 Operation panel 37e Protrusion 61 Storage box 61a Opening 61b Stepped portion 62 Operation part Circuit board 63 Screw 71 Control circuit board 72 Screw 78 Lead wire 82 Support recess 83 Presser recess 84 Vertical rib 91 Drawout hole 93 Seal pad pair 93a Matching Eye

Claims (1)

[Scope of utility model registration request] 1. An electric rice cooker in which an operation panel is provided on a surface of a shoulder member of a body, and an accommodation box for accommodating an operation unit circuit board is arranged on the back side of the operation panel, wherein the accommodation box is provided on the operation panel side. The shoulder member is integrally formed so as to open, and a seal packing for closing the lead wire outlet is provided at the lead wire outlet of the storage box, and the lead wire of the operation unit circuit board is drawn out of the storage box through the seal packing. An electric rice cooker characterized by that.