JP5609438B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker used for general home use or business use.

  Conventionally, in order to make the rice cooker body compact, this type of rice cooker has installed structural components such as a control board in the rice cooker body in the lower rear part (see, for example, Patent Document 1).

  FIG. 6 shows a partially broken side view of a conventional rice cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 6, the upper frame 3, the inner pot 4, the bottom induction heating coil 6, the control board 18, the heat sink 23, the fan motor 24, and a protective frame 75 are included.

  In the conventional rice cooker described in Patent Document 1, a bottom induction heating coil 6 that is a heating means of the inner pot 4 is first attached to the upper frame 3 constituting the outer shell of the main body and below the rear portion of the upper frame 3. A protective frame 75 made of a flame retardant member is installed, and a control board 18 for controlling the bottom induction heating coil 6 is installed below the protective frame 75 so that its component surface and solder surface are in a substantially vertical direction. Below that, a heat sink 23 for cooling the control board 18 and a fan motor 24 are installed.

  By taking this configuration, since there are no structural parts in the front part and the width direction part in the rice cooker main body, a compact rice cooker having a clean design is realized.

  In addition, the above-mentioned configuration also considers the safety of the rice cooker body, and assumes that a crack has occurred in the upper frame above the control board due to an abnormal situation such as a product falling. Since the protective frame is configured to cover the upper side of the control board even when it enters the rice cooker body, water can be prevented from adhering to the control board.

  Further, the configuration in which the control board is installed so that the component surface and the solder surface are in a substantially vertical direction assumes that not only the upper frame but also the protective frame above the control board is cracked. Even when water intrudes into the control board from the control section, it is designed so that the water that has entered does not stagnate on the control board and flows downward. This configuration reduces the possibility of a short circuit.

  Moreover, comprising a protective frame with a flame-retardant member assumes the case where a control board breaks and it ignites, and a protective frame becomes a flame barrier and prevents the fire spread of a rice cooker.

  As mentioned above, the conventional rice cooker described in the said patent document 1 is the structure which has the compactness and safety | security of a product.

  Moreover, there are some which have installed structural components, such as a board | substrate, under the inner pot accommodating part of a rice cooker (for example, refer patent document 2).

  FIG. 7 shows a perspective sectional view of a conventional rice cooker described in Patent Document 2. As shown in FIG. As shown in FIG. 7, the control board 18, the board base 19, the water receiving part 19 a, the water sink part 19 b, the through hole 70, and the inner pot storage part 71 are configured.

The conventional rice cooker described in Patent Document 2 includes an inner pot storage portion 71 having a plurality of holes such as a bottom sensor set through hole 70 and a screw tightening hole on the bottom surface, and an inner pot storage portion. A substrate base 19 having a water receiving portion 19a and a water sink portion 19b on the surface facing the bottom surface of the inner pot storage portion below, and a control board on the back surface of the substrate base 19 having the water receiving portion 19a and the water sink portion 19b. 18 are installed so that the component surface and the solder surface are in a substantially horizontal direction.

  By adopting this configuration, since there are no structural parts in the left and right direction part of the rice cooker body, a compact rice cooker having a clean design is realized.

  In addition, the structure of the water receiving part and the water sink part of the base board is based on the assumption that water has entered the lower part of the inner pot storage part. This prevents water from adhering to the substrate.

  As mentioned above, the conventional rice cooker described in patent document 2 is the structure which has the compactness and safety | security of a product.

JP-A-11-56606 JP 2007-31845 A

  However, in the conventional configuration described in Patent Document 1, the protective frame has an induction heating coil for heating the inner pot at the front portion thereof, and a configuration in which a control board is installed at the rear portion thereof. It is equipped with a water receiving structure that prevents water from adhering to the control board just above the structure where the control board is installed, and is a large part that spans the entire middle layer of the rice cooker body, so it is a countermeasure against warping during molding. (Arrangement of warp countermeasure ribs, increase in basic wall thickness).

  Furthermore, because it is connected to the body that constitutes the lower layer of the rice cooker with a direct screw tightening configuration, it is also a component that the body is susceptible to impact from the floor when the product is dropped. Boss reinforcement, basic wall thickness increase).

  Furthermore, it is necessary to ensure both the electrical insulation of the bottom induction heating coil and the flame retardance of the control board, and it is made of a material whose material unit price is higher than that of a general resin material.

  For the above reason, the protective frame has a problem that it is a component having a large component volume and weight and a high material cost.

  Furthermore, as described above, the protective frame is a component that is susceptible to impact from below, so that the impact is not transmitted to the control board installed on the protective frame and is not damaged. Because there was a need to provide a vertical gap between the protective frame and the control board in the vertical direction between the protective frame and the upper frame in the vicinity of the part where the control board is installed as a countermeasure against the reaction force generated by dropping from above And the height direction of the rice cooker main body increased, and the rice cooker main body could not be made compact.

  On the other hand, in the conventional configuration described in Patent Document 2, in order to install components such as a control board below the inner pot storage unit, the configuration of the conventional rice cooker described in Patent Document 1 is the same. The problem was that the product could not be made compact in the height direction.

Furthermore, because it has a plurality of holes such as a through hole for the bottom sensor set and a screw tightening hole below the bottom of the inner pot storage section, rice and water in the inner pot accidentally overflow into the inner pot storage section. If this happens, water can easily enter the bottom of the inner pot storage part, and the component surface and solder surface of the control board are configured to be in a substantially horizontal direction. If a crack occurs in the water receiving part and the water sink part of the substrate base, water that has entered from the crack in the substrate base may stagnate on the control board, and the high current part of the control board may be short-circuited. It was a high configuration.

  Furthermore, even when the large current portion of the control board is shorted as described above, the control board is damaged, and as a result, the control board is ignited, the board base is not composed of a flame retardant member. It was a configuration that could cause the spread of fire to the vessel.

  For the reasons as described above, the configuration of the conventional rice cooker described in Patent Document 2 has a problem in the safety of abnormal situations.

  This invention solves the said conventional subject, and it aims at providing the rice cooker which reduced the cost of the rice cooker main body and implement | achieved compactness, ensuring the safety | security of a rice cooker main body.

  In order to solve the conventional problems, the rice cooker of the present invention includes a rice cooker body, an upper frame that forms an upper surface opening of the rice cooker body, an upper part of the rice cooker body, and the upper surface opening. A lid that is pivotally supported by a hinge portion and freely opens and closes, an inner pot that is detachably accommodated in the rice cooker body, and a food that is located below the upper frame and that heats the food in the inner pot A protective frame having a heating means for controlling, and a control board having a control device for controlling the heating means, the control board being located immediately below the hinge portion of the upper frame, The hinge part is provided with a hinge spring for biasing in the opening direction, and a through hole for locking the hinge spring is provided below the hinge shaft part. In order to guide water to the outside of the main unit, from directly under the hinge to the inner wall of the main unit By attaching a hinge reinforcing bracket having a downward drainage inclined surface by bending one end thereof from the lower side of the hinge shaft portion and having both ends of the mounting flat portion fixed to the back surface of the upper frame in a U-shaped cross section. While maintaining the strength of the hinge part of the frame, it has become possible to eliminate the conventional ribs provided around the hinge part on the back of the upper frame to reinforce the upper frame. The rice cooker body can be made compact. At the same time, even when water enters the rice cooker body from the hinge spring locking part of the upper frame above the control board, the water is attached to the hinge reinforcement bracket and the drainage structure is provided, so that water may adhere to the control board. There is no loss of safety.

  As described above, it is possible to achieve cost reduction and downsizing of the rice cooker body while ensuring the safety of the rice cooker body.

  The rice cooker of this invention can implement | achieve compactization of a product at low cost, ensuring the safety | security of the rice cooker main body.

Side sectional view of the rice cooker in Embodiment 1 of the present invention. Sectional drawing of the principal part of the state which installed the control board in the board | substrate base of the rice cooker in Embodiment 1 of this invention. The perspective view from the bottom face side of the state which installed the hinge reinforcement metal fitting of the rice cooker in Embodiment 1 of this invention (A) in Embodiment 1 of the present invention is a single-piece perspective view of the hinge reinforcing bracket (b) is a perspective view showing the flow of water. Sectional drawing which shows the principal hinge metal fitting attachment state in Embodiment 1 of this invention Partially broken side view of a conventional rice cooker Perspective cross-sectional view of a conventional rice cooker

  1st invention forms a rice cooker main body, the upper frame which formed the upper surface opening part of the said rice cooker main body, and the upper part of the said rice cooker main body, and the said upper surface opening part is pivotally supported by the hinge part, and is free. A lid that opens and closes hinges, an inner pot that is detachably stored in the rice cooker body, and a protective frame that is located below the upper frame and includes a heating means for heating the food in the inner pot. A control board provided with a control device for controlling the heating means, the control board is located immediately below the hinge part of the upper frame, and a hinge spring is attached to the hinge part of the upper frame in the opening direction. The rice cooker is provided with a through-hole for locking the hinge spring below the hinge shaft portion, and is fixed to the rear surface of the upper frame in a U-shaped cross-section, toward the inner surface of the main body. Bend drain slope surface by bending one end of the hinge shaft from the lower side In addition, by providing a hinge reinforcing bracket formed so as to close the lower side of the through hole, a number of ribs are conventionally used to reinforce the upper frame while maintaining the strength of the upper frame hinge portion. What was provided in the periphery can be abolished, the cost can be reduced, the space in the height direction of the rice cooker body can be reduced, and the rice cooker body can be made compact. At the same time, when water intrudes into the inside of the rice cooker body from the hinge spring locking portion of the upper frame above the control board, the water is attached to the hinge reinforcing bracket and the drainage configuration is provided, so that water may adhere to the control board. There is no loss of safety. As described above, it is possible to achieve cost reduction and downsizing of the rice cooker body while ensuring the safety of the rice cooker body.

  In particular, the second invention is the drainage structure of the first invention, in which both side ends of the descending drainage inclined surface of the hinge reinforcing bracket are bent into a U-shaped cross section to provide a rising portion. The flow path of the infiltrated water can be limited to the inner wall of the main body, water can be prevented from adhering to the control board, and the strength of the hinge reinforcing bracket can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side sectional view of a rice cooker according to the first embodiment of the present invention, and FIG. 2 is a diagram showing a state in which a control board is installed on the substrate base of the rice cooker according to the first embodiment of the present invention. FIG. 3 is a partial cross-sectional view, FIG. 3 is a perspective view from the bottom side of the rice cooker according to the first embodiment of the present invention, and FIG. 4 is a first embodiment of the present invention. (A) is a perspective view of a single piece of the hinge reinforcing bracket, (b) is a perspective view showing the flow of water, and FIG. 5 is a main portion showing the hinge reinforcing bracket mounting state in the first embodiment of the present invention. A sectional view is shown.

  In FIG. 1, the rice cooker main body 1 is comprised from the upper frame 3 which has the body 2 and the upper surface opening part 3a, The protective frame 5 which accommodates the inner pot 4 is provided in the inside, Below the protective frame 5 Are provided with a bottom induction heating coil 6 which is an inner pot heating means for heating the inner pot 4 and a bottom sensor 7 which is an inner pot temperature detecting means for detecting the temperature of the inner pot 4. The lower part of the protective frame 5 is connected to the body 2 by a screw tightening structure, and the upper part is connected to the upper frame 3 by a screw tightening structure.

The configuration area of the protective frame 5 in the rice cooker main body 1 stays in the vicinity of the connecting portion between the lower part of the inner pot 4 and the body 2 and the upper frame 3, and to the rear part of the rice cooker main body 1 (right side in FIG. 1). Not reached. The inner pot 4 is placed on the upper frame 3 by the inner pot flange portion 15 and keeps a distance from the bottom induction heating coil 6. A side induction heating coil 9, which is an inner pot side surface heating means for heating the side surface of the inner pot 4, is installed on the side surface portion of the inner pot 4.

  The lid 12 forms the upper part of the rice cooker body 1 and freely opens and closes the upper surface opening 3 a of the upper frame 3. In the state where the lid 12 is closed, it is supported by the rice cooker body 1 by engaging with the hook lever 10. A lid heating plate 11 is installed below the lid body 12, and a lid induction heating coil 14 that is a lid heating plate heating means for heating the lid body 12 and a lid sensor 13 that is a lid temperature detection means are provided inside. In the upper part, an operation unit 40 which is an input device of the rice cooker body 1 is disposed.

  The lid heating plate 11 is provided with an inner pot seal packing 16 that comes into contact with the inner pot flange portion 15 to seal the steam generated by heating the food 17 in the inner pot 4 from leaking. .

  The control board 18 includes a control device (not shown) that controls the amount of current supplied to each heating means based on the temperature information of the bottom sensor 7 and the lid sensor 13 and adjusts the amount of heating to the inner pot 4. Based on the signal emitted from the control board 18, the cooked food 17 in the inner pot 4 is cooked and kept warm. The cooked food 17 is rice before cooking rice, water, cooked rice, or the like. Each heating means may be a heater.

  As shown in FIGS. 1, 2, and 3, the substrate base 19 is formed of a flame retardant member, has a prismatic shape with one surface opened, and the rear of the rice cooker body 1 so that the opening surface is a substantially vertical surface. The protective frame 5 is fixed immediately below the upper frame 3.

  The control board 18 is installed such that the solder side 20 faces the control board installation surface 21 of the board base 19. In addition, a constant space 22 is provided between the solder surface side 20 of the control board 18 and the board base 19, and this constant space 22 is a lead terminal (on the board component mounted on the control board 18 ( It serves to prevent direct contact between the substrate base 19 and a pattern (not shown) or a pattern (not shown).

  The control board 18 is securely fixed by claw fitting, hooking, screw fixing or the like so that the control board 18 is securely fixed to the control board installation surface 21 of the board base 19 without floating. Yes. The configuration described above is intended to prevent the spread of fire from the solder surface 20 of the control board 18 to the rice cooker body 1 even when the control board 18 is ignited due to an abnormal situation such as adhesion of water or cracking of the board. Yes.

  In addition, the control board 18 includes a heat sink 23 for cooling the board components below it and a fan motor 24 for sending air outside the rice cooker body 1 into the inside of the rice cooker body 1 immediately below the heat sink 23. ing. A control board 25 that controls the rotation of the fan motor 24 is provided at a substantially central portion of the fan motor 24.

  As described above, the control board 18, the board base 19, the heat sink 23, the fan motor 24, and the control board 25 are integrated with each other at the rear part of the rice cooker main body 1, and the hinge part 28 (described later) of the upper frame 3. ).

  As shown in FIG. 5, the hinge portion 28 of the upper frame 3 is provided with a hinge spring 29 that is urged in the opening direction and is pivotally supported by the hinge shaft portion 30. A through hole 31 for locking the hinge spring 29 is provided below the hinge shaft portion 30.

A rib wall 32 is provided below the through-hole 31 for locking the hinge spring 29 so as to surround the through-hole 31, substantially vertically downward in the extending direction of the side wall of the through-hole 31, and an opening on the lower side of the rib wall 32 is provided. The hinge reinforcing bracket 33 is arranged so as to be closed.

  As shown in FIGS. 4 and 5, the hinge reinforcing bracket 33 is on the lower surface of the hinge portion 28 of the upper frame 3, and the plane portion 37 having a U-shaped cross section from the vicinity of the inner pot 4 to the vicinity of the through hole 31. The upper frame 3 is fixed to the upper frame 3 with two screws.

  The hinge reinforcing metal fitting 33 is bent at one end toward the inner wall 2a of the main body from the lower side of the hinge shaft portion 30, that is, immediately below the through hole 31 to form a downwardly inclined drainage inclined surface 34, and toward the inner surface of the rice cooker main body 1. By extending, the lower side of the rib wall 32 below the through hole 31 is closed, and a drainage passage is formed between the rib wall 32 and the rib wall 32.

  By raising both sides of the drainage inclined surface 34 of the hinge reinforcing bracket 33 so as to have a U-shaped cross section, it is possible to improve the strength of the bracket and serve as a drainage basin.

  A vertical rising portion 38 is provided at the lowermost end portion of the drainage inclined surface 34 of the hinge reinforcing bracket 33, and is engaged with and fixed to the fitting portion 3 b provided at the lower portion of the upper frame 3. Moreover, the notch 35 is provided in the both sides of the lowest end part, and the drainage channel is comprised.

  About the rice cooker comprised as mentioned above, the operation | movement and effect | action when water penetrate | invades from the through-hole 31 for hinge spring latching of the upper frame 3 by a vibration and how to handle at the time of opening of a rice cooker etc. Is described below.

  The water that has entered the through hole 31 of the upper frame 3 drops on the hinge reinforcing bracket 33 directly or through the rib wall 32 that extends in the side wall direction of the through hole 31 so as to surround the through hole 31.

  Since the hinge reinforcing bracket 33 is a drain sloped surface 34 that is a downward slope from directly below the hinge portion, the dripped water flows along the drain sloped surface 34 in the direction of the inner wall 2a as shown by the arrow in FIG. Led to. It is discharged from a hole (not shown) provided in the lower surface of the main body through the inner wall 2a of the main body from the notch 35 of the hinge reinforcing bracket 33, and water does not adhere to the control board 18 and the like.

  It is more effective if a vertical water guide rib or the like is provided in this portion of the body side wall 2a.

  As described above, even if water intrudes from the through hole 31 for locking the hinge spring of the upper frame 3, the rice cooker main body 1 can safely be attached without adhering to the electrical components such as the control board 18 and the fan motor 24. Is discharged outside.

  On the other hand, as shown in FIGS. 1 and 5 and described above, the lid 12 is urged in the opening direction by the hinge spring 29 provided in the hinge portion 28 of the upper frame 3. In a state where the lid 12 is closed, the lid 12 is closed against the biasing force of the hinge spring 29 due to the engagement with the hook lever 10, but during that time, one end of the hinge spring 29 is locked. A reaction force is applied to the through-hole 31 of the upper frame 3 provided in.

  Further, when the engagement with the hook lever 10 is released from the closed state, the cover body 12 is biased in the opening direction by the hinge spring 29 and stops in the released state of the hinge spring 29. At this time, the cover body 12 is opened. Inertial force in the direction is applied to the through hole 31 through the hinge spring 29.

  By repeatedly applying these forces to the upper frame 3 having the through holes 31, the upper frame 3 is warped due to secular change, and the lid 12 and the hook lever 10 cannot be engaged with each other. May open or close badly.

  Therefore, the cross-section of the flat portion 37 of the hinge reinforcing bracket 33 extending from the position immediately below the hinge portion 28 that is most likely to be deformed due to the most external force applied when the lid is opened and closed, and that is most likely to be deformed even with aging, is U-shaped. By adopting a flat fixed part of the shape, it is possible to eliminate many reinforcing ribs that have been provided on a part of the upper frame in the past, or to reduce the height of the ribs and to compress the dimensions in the height direction. Further, the rice cooker body 1 can be made more compact.

  Further, by forming both sides of the drainage inclined surface 34 of the hinge reinforcing bracket 33 in a U-shaped cross-section and making it into a bowl shape, it is possible to increase the strength as a bracket and to achieve the effect of a drainage bowl. .

  As described above, in the present embodiment, even if water enters from the through hole 31 of the hinge portion of the upper frame 3, the water adheres to the control board 18 and the control board 25 of the fan motor 24. It is possible to ensure safety as a product.

  As described above, the rice cooker according to the present invention can be reduced in cost and compact in the rice cooker main body while ensuring the safety of the rice cooker main body, and therefore can be applied to other uses such as cooking equipment. .

DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Body 2a Main body side wall 3 Upper frame 3a Upper surface opening part 3b Insertion part 4 Inner pan 5 Protective frame 6 Bottom induction heating coil 7 Bottom sensor 9 Side induction heating coil 10 Hook lever 11 Lid heating plate 12 Lid 13 Lid sensor 14 Lid induction heating coil 15 Inner pan flange part 16 Inner pan seal packing 17 Cooked food 18 Control board 19 Substrate base 20 Solder surface side 21 Control board installation surface 22 Constant space 23 Heat sink 24 Fan motor 25 Control board 28 Hinge part DESCRIPTION OF SYMBOLS 29 Hinge spring 30 Hinge shaft part 31 Through-hole 32 Rib wall 33 Hinge reinforcement metal fitting 34 Drainage inclined surface 35 Notch 37 Plane part 38 Vertical rise part 40 Operation part

Claims (2)

A rice cooker body, an upper frame that forms an upper surface opening of the rice cooker body, a lid that forms an upper part of the rice cooker body and is pivotally supported by a hinge portion to freely open and close the hinge , An inner pot that is detachably stored in the rice cooker body, a protective frame that is located below the upper frame and has heating means for heating the food in the inner pot, and controls the heating means A control board having a control device for controlling the control board, the control board being positioned substantially directly below the hinge part of the upper frame, and a hinge spring for urging the hinge spring in the opening direction on the hinge part of the upper frame. A rice cooker provided with a through-hole for latching the hinge spring below the hinge shaft part, which is plane-fixed to the rear surface of the upper frame in a U-shaped cross section, and has one end facing the inner side surface of the main body hinged Bend from near the lower part of the shaft part to form a downward drainage inclined surface. Cooker, characterized in that it comprises a hinge reinforcement bracket having formed so as to close the lower side of the hole. The rice cooker according to claim 1, wherein the descending drainage inclined surface is constituted by an inclined surface having a U-shaped water receiving portion, and a drainage gap is formed at a lowermost end portion.