JP3909279B2 - Jar rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice cooker / heat retaining jar rice cooker used for general household use and business use.
[0002]
[Prior art]
A conventional jar rice cooker of this type is known as shown in FIG.
[0003]
In FIG. 4, 1 is a main body of the rice cooker, 2 is an inner pot that is detachably accommodated in the upper surface opening of the main body 1, and 3 is a lid that covers the upper surface opening of the inner pot 2 and that can be opened and closed. Reference numeral 5 denotes a control unit for controlling the induction heating coil 9 which is a heating device, 4 denotes an operation unit for performing an input operation to the control unit 5, and 7 denotes a temperature detection device for detecting the temperature of the inner pot 2. Reference numeral 8 denotes an inner container. The induction heating coil 9 is arranged on the lower outer surface of the inner container 8, and a plurality of ferrite pieces 10 are attached to the induction heating coil 9 radially. Reference numeral 11 denotes a bottom plate that forms the outline of the bottom of the main body 1.
[0004]
The ferrite piece 10 has a built-in ferrite 10a, a convex portion 10b is provided on one side, a receiving portion 8a into which the inner container 8 is inserted is provided, and the other side is fixed to the inner vessel 8 with screws 13 is doing. Further, the inner container 8 is sandwiched between the main body ring 1 a and the bottom plate 11 and fastened together with screws 12.
[0005]
[Patent Document 1]
“JP-A-10-201612”
Therefore, in recent years, as disclosed in Japanese Patent Application Laid-Open No. 10-201612, the number of screws used for assembling the rice cooker is reduced, and the ferrite core and the sensor are attached at the same time, thereby reducing the number of parts and the number of assembling steps. What has been proposed.
[0006]
[Problems to be solved by the invention]
In the rice cooker having the configuration of the conventional example, at least one screw must be used to attach one ferrite piece, and a plurality of ferrite pieces are used per unit. Each attachment position must be attached separately to the inner container. Furthermore, since it is sandwiched between the main body ring and the bottom plate and fixed again with screws, there is a problem that the number of screws used increases, and the number of parts and assembly man-hours increase.
[0007]
And the said Unexamined-Japanese-Patent No. 10-201612 is for improving such a problem. However, in this publication, the shape of the receiving portion provided on the protective frame and the mounting portion provided on the ferrite core are complicated, and the unit cost is high. In addition, the ferrite core is to be pressed by the sensor mounting member, and until then it is hung from the receiving part of the protective frame, and when the sensor mounting member is mounted, the ferrite core is pressed and attached to the protective frame side. It took time to assemble and the workability was poor.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a receiving part for fixing a ferrite piece in the inner container, a convex part for mounting on the ferrite piece, and a through hole in the inner container on the other side. At the same time, the ferrite piece is provided with a boss, and after the convex portion of the ferrite piece is inserted into the receiving portion of the inner container, the boss is inserted into the through hole of the inner container and temporarily fixed. Thereafter, the inner container to which the ferrite piece is attached is sandwiched between the main body ring and the bottom plate and fastened together.
[0009]
According to the configuration of the present invention, the ferrite piece can be temporarily fixed to the inner container without using a screw, and the number of screws for fixing the ferrite piece, which has conventionally been required, can be reduced. The number of points can be reduced, and workability is improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The jar rice cooker of the present invention is provided for a main body, an inner pot that is detachably accommodated in the main body, an inner container that accommodates the inner pot, an induction heating coil that is disposed on the lower outer surface of the inner container, and an induction heating coil. In a jar rice cooker comprising a plurality of ferrite pieces arranged radially, a control unit that controls the induction heating coil, an operation unit for performing input operation to the control unit, and a bottom plate that forms the bottom outline of the main body, The inner container is provided with a receiving portion for attaching a ferrite piece on the center portion side and a through hole is provided on the side surface portion side, while one end side of the ferrite piece is provided with a convex portion fitted to the receiving portion and the other end The arm part is raised on the side, and a projecting boss that fits into the through hole is provided on the flat part at the tip. Further, when attaching the ferrite piece to the inner container, the ferrite piece After inserting the protruding portion into the receiving portion of the inner container is fitted to the boss of the ferrite pieces in the through-hole of the inner container, the ferrite pieces stop temporarily, in which so as to fix.
[0011]
Further, the arm portion of the ferrite piece has a spring property so that the above-mentioned boss can be easily fitted when fitted into the through hole of the inner container.
[0012]
Further, the end portion of the flat portion of the ferrite piece is sandwiched between the main body ring and the bottom plate and fastened together with a screw to be fixed.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a jar rice cooker showing an embodiment of the present invention. FIG. 2 is also a cross-sectional view of the main part, and is a state diagram in the middle of attaching the ferrite piece. FIG. 3 is also a cross-sectional view of the main part, and is a state diagram after the ferrite piece is attached.
[0014]
In the figure, 1 is a main body of the rice cooker, and 1a is a main body ring formed integrally with the main body 1. Reference numeral 2 denotes an inner hook that is detachably accommodated in the upper surface opening of the main body 1, and 3 is a lid that covers the upper surface opening of the inner hook 2 and that can be opened and closed. Reference numeral 5 denotes a control unit for controlling the induction heating coil 9 which is a heating device, 4 denotes an operation unit for performing an input operation to the control unit 5, and 7 denotes a temperature detection device for detecting the temperature of the inner pot 2. Reference numeral 8 denotes an inner container. The induction heating coil 9 is arranged on the lower outer surface of the inner container 8, and a plurality of ferrite pieces 10 are attached to the induction heating coil 9 radially. Reference numeral 11 denotes a bottom plate that forms the outline of the bottom of the main body 1.
[0015]
The ferrite piece 10 contains a ferrite 10a and is insert-molded by a resin mold. Since this ferrite piece 10 is fixed to the inner container 8, it has a convex portion 10b for insertion on one side, an arm portion 10d raised in a crank shape on the other side, and a flat portion 10e connected to the upper end thereof. A protruding boss 10c is provided in the portion 10e to be inserted into the through hole 8b of the inner container 8, and a punch hole 10f is further provided on the outside thereof. The arm portion 10d has a spring property and bends to the left and right when a force f shown in FIG. 2 is applied.
[0016]
Further, in order to fix the ferrite piece 10 to the inner container 8, a receiving portion 8a for inserting the convex portion 10b of the ferrite piece 10 is provided, and a through hole 8b for inserting the boss 10c of the ferrite piece 10 is provided on the other side. In addition, another punch hole 8c for fastening with the main body ring 1a and the bottom plate 11 is provided on the outside thereof.
[0017]
Here, a method of attaching the ferrite piece 10 will be described with reference to FIGS.
[0018]
First, the induction heating coil 9 is attached to the inner container 8. In this state, since the induction heating coil 9 is easily detached, the ferrite piece 10 is attached so as to sandwich the induction heating coil 9. In the ferrite piece 10, first, the protruding portion 10 b at the tip is inserted into the receiving portion 8 a provided in the inner container 8. Next, the boss 10 c of the ferrite piece 10 is inserted into the through hole 8 b of the inner container 8. If the boss 10c is normally attached, the boss 10c has a long dimension and cannot be inserted into the through hole 8b of the inner container 8. Therefore, by applying a force f in the direction of the arrow shown in FIG. 2, the arm portion 10 d of the ferrite piece 10 has a spring property, so that the boss 10 c enters the through hole 8 b of the inner container 8 easily. . It is preferable to round the tip of the boss 10c so that it can be easily inserted.
[0019]
As shown in FIG. 3, the boss 10c that has entered the through hole 8b of the inner container 8 receives the weight of the induction heating coil 9 due to gravity. However, the boss 10c is formed in the through hole 8b of the inner container 8 by the spring force of the arm portion 10d. By pushing the side surface, the boss 10c is caught by the side surface portion and cannot be easily detached.
[0020]
As can be seen from the above, the length of the boss 10c of the ferrite piece 10 is easily removed if it is short, and if it is too long, it cannot be inserted into the through hole 8b. It is necessary to set the length.
[0021]
As a result, the ferrite piece 10 can be fixed to the inner container 8 without a screw, and is finally sandwiched between the screw receiving portion of the main body ring 1a and the bottom plate 11 and securely fixed with the screw 12. At this time, the screw 12 is screwed and fixed to the screw receiving portion of the main body ring 1a from below the bottom plate 11 through the hole in the bottom plate 11, the hole 10f in the ferrite piece 10, and the hole 8c in the inner container 8. It is.
[0022]
【The invention's effect】
As described above, according to the present invention, the ferrite piece can be temporarily fixed to the inner container without using a screw, and the number of screws for fixing the ferrite piece, which has been conventionally required, can be reduced. Therefore, the number of parts can be reduced, and workability can be improved.
[Brief description of the drawings]
FIG. 1 is a sectional view of a jar rice cooker showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the main part of the same.
FIG. 3 is a cross-sectional view of the main part of the same.
FIG. 4 is a cross-sectional view of a conventional jar rice cooker.
[Explanation of symbols]
1: Main body, 1a: Main body ring, 2: Inner hook, 4: Operation part, 5: Control part, 8: Inner container, 8a: Receiving part, 8b: Through hole, 9: Induction heating coil, 10: Ferrite piece, 10b: convex part, 10c: boss, 10d: arm part, 10e: flat part, 10f: punched hole, 11: bottom plate.

Claims (3)

A main body (1), an inner hook (2) detachably accommodated in the main body (1), an inner container (8) for accommodating the inner hook (2), and a lower outer surface of the inner container (8). An induction heating coil (9), a plurality of ferrite pieces (10) arranged radially with respect to the induction heating coil (9), a control unit (5) for controlling the induction heating coil (9), and a control unit (5 ) And a bottom plate (11) that forms the bottom outline of the main body (1), the inner container (8) has a ferrite piece (10). The mounting receiving portion (8a) is provided on the center portion side, and the through hole (8b) is provided on the side surface portion side, while one end of the ferrite piece (10) is a convex portion that fits into the receiving portion (8a). (10b) is provided, and the arm (10d) is raised on the other end side. When a flat boss (10e) at the tip is provided with a protruding boss (10c) that fits into the through hole (8b), and when the ferrite piece (10) is attached to the inner container (8), ferrite After inserting the convex part (10b) of the piece (10) into the receiving part (8a) of the inner container (8), the boss (10c) of the ferrite piece (10) is inserted into the through hole (8b) of the inner container (8). A jar rice cooker characterized by being fitted and temporarily fixing and fixing the ferrite piece (10). The jar rice cooker according to claim 1, wherein the arm portion (10d) of the ferrite piece (10) has a spring property. The end portion of the flat portion (10e) of the ferrite piece (10) is configured to be fixed by being fastened together with a main body ring (1a) and a bottom plate (11) with a clamping screw (12). The jar rice cooker according to claim 1.

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