JPH0574366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to an improvement in a rice cooker, particularly a rice cooker having an automatic opening lid mechanism.

[Conventional technology]

7 to 9 are cross-sectional views of a conventional rice cooker disclosed in, for example, Japanese Unexamined Patent Publication No. 59-232519, in which 1 is the rice cooker main body, 2 is a lid body, 3 is a shaft portion, and the lid is A body bearing 3a is provided on one side of the lid body 2, and a body bearing 3b is provided on one side of the lid body 2.
is provided on one side of the rice cooker main body 1, a shaft 3c is passed between both bearings, and the lid body 2 is rotatably supported on the rice cooker main body 1. 4 is a lock part provided on the other side of the rice cooker main body 1; 5 is a latch provided on the lid body 2 facing this lock part 4; energized. 7 is the lock release button, 8 is the shaft 3c
It is a torsion spring whose spiral portion 8a is fitted into the rice cooker main body 1 side, and the other end is brought into contact with the inner surface of the lid body 2. 9 is a rib that supports the other end of the torsion spring.

Next, the operation will be explained. As shown in FIG. 9, when the lid body 2 is in the closed state, the latch 5 is engaged with the lock portion 4. To open the lid 2, the lock release button 7 is pressed, and the latch 5 is released from the lock portion 4. At this time, the twist spring 8 rebounds and pushes the lid 2 upward.

[Problem to be solved by the invention]

In the conventional rice cooker as described above, when the lid 2 is in the closed state, the elastic force of the twist spring 8 is always concentrated on one point on the lid 2, causing the lid 2 to deform or crack. There was a problem.

Also, when assembling, pass the shaft 3c through the lid body 2 and the rice cooker body 1.
When the torsion spring 8 is engaged with the lid body 2, the other end side of the torsion spring 8 is
While supporting the torsion spring 8 with your hand, remove the shaft 3 more easily.
c had to be inserted into the cylindrical portion 7c and guided to the lid bearing 3a, resulting in poor workability.

This invention was made in order to solve the above-mentioned problems, and aims to provide a rice cooker whose lid body is not deformed by the elastic force of the torsion spring.

Another object is to improve workability when engaging and disengaging the lid and the rice cooker main body during assembly or repair.

[Means to solve the problem]

The rice cooker according to the present invention includes a main body including an outer case in which a heater for heating an inner pot is provided and a storage section for storing the inner pot; A support frame connected to the outer case of the main body and near the inner periphery to which the outer pot is fixed, a hook that covers the opening of the inner pot by engaging with the support frame, and a lock that locks the lid in the closed state. a mechanism, a lock release operation part for releasing the lock mechanism, a hinge part provided on the support frame at a position apart from the lock mechanism and rotatably supporting the lid, and facing the inner upper surface part of the lid. A reinforcing plate having an upper surface portion and a peripheral edge portion opposite to a peripheral edge portion continuous to the upper surface portion, one end of which is opposite to the peripheral edge portion of the upper surface portion of the reinforcing plate so as to bias the lid in the opening direction. It is provided with a biasing member that engages with an engaging portion formed at the other end of the different portion and whose other end is attached to the support frame.

[Effect]

The reinforcing plate in this invention receives the elastic force applied to the other end of the torsion spring and distributes it to the lid body. Further, the bent shape of the reinforcing plate absorbs the bending stress applied to the lid body by the elastic force of the torsion spring.

Further, the reinforcing plate supports the torsion spring on the lid body side provided with the bent portion. The shaft cylinder also supports the helical portion of the torsion spring. Further, the shaft cylinder supports the spiral portion of the torsion spring, and the reinforcing plate supports the torsion spring on the lid side.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the figure, 10 is the rice cooker main body,
11 is a lid body (lid), 12 is a shaft part and is a lid body (lid)
11 is rotatably supported on the rice cooker main body 10. This shaft portion 12 is formed by fitting a bearing 12a formed on one side of the lid body 10, a shaft cylinder 12b removably provided on this bearing, and a shaft cylinder 12b and the bearing 12a into one part of the rice cooker main body 10. The shaft 12d is supported by a main body bearing 12c formed on the side.

13 is a block part provided on the other side of the rice cooker main body 1, and 14 is a lid body 2 facing this lock part 13.
It is a latch provided on the latch, and is always biased by a spring 15 in a direction to be engaged with the lock portion 13.
16 is a lock release button (generally a lock release operation part), 17 is a torsion spring having a spiral portion 17a that is supported by being inserted into and removed from the shaft cylinder 12b, and one end 17b is supported on the side of the rice cooker main body 10. is,
The other end 17c is provided on the inner surface of the lid 11 through the elongated hole 11a. A metal reinforcing plate 18 is fixed by a screw 19 to the curve between the other end 17c of the torsion spring 17 and the inner surface of the lid 11, and extends over the bent portion 11a of the lid 11 formed on the upper side of the shaft portion 12. It is bent. 18a is this reinforcing plate 1
8 is a bent corner that protrudes convexly by pressing and bending, 20 is an L-shaped bent part where the inner edge of the reinforcing plate 18 is bent into an L-shape, and 21 is an L-shaped bent part of this L-shaped bent part. This is an opening that is a support part provided across the corner, and is connected to the pilot hole part 21a and the horizontal hole part 2.
1b. This opening 21 is the torsion spring 1
The tip portion 17d of the other end 17c of 7 is fitted therethrough. 22 is a reinforcing plate 18 formed on the inner surface of the lid body 11.
It has multiple ribs that support it.

Next, the operation will be explained. When the lid body 11 is closed, a strong elastic force acts on the other end 17c of the twist spring 17 and always transmits a strong elastic force to the inner surface of the lid body 11. At this time, the other end 17c of this torsion spring and the lid body 1
There is a reinforcing plate 18 between the inner surface of the lid body 11 and the reinforcing plate 18, and this reinforcing plate 18 disperses the elastic force applied to the other end 17c of the torsion spring to the plurality of ribs 22, so that no local elastic force is applied to the lid body 11. Therefore, deformation of the lid body 11 can be prevented. Furthermore, since the reinforcing plate 18 is provided across the bent portion 11a of the lid 11, this lid 1
Since the bending stress acting in the direction of opening the first bent portion 11a is suppressed, deformation and cracking of the bent portion 11a can be prevented.

Furthermore, as shown in FIG. 3, when fitting the barrel b into the bearing 12a, by fitting and supporting the helical portion 17a, the torsion spring 17 is supported by the lid 11, so that it does not fall off. There is no need to support the torsion spring 17 by hand during assembly, which makes work easier, and when repairing a defective spring, simply pull out the shaft 12d, remove the shaft cylinder 12b from the bearing 12a, and release the support of the spiral portion 17a. You can easily attach the twist spring 17 to the lid 1 without disassembling the lid 11.
It can be removed from 1.

In addition, the spiral portion 17 of the twisting spring 17
a, the other end 17c of the torsion spring 17 is fitted into the opening 21 of the reinforcing plate 18, so that the torsion spring 17 does not fall off from the lid 11, and rotational vibration in the vertical direction is prevented. Since the lid body 11 and the rice cooker main body 10 can be engaged with each other very easily.

Further, as shown in FIG. 4, by bending the inner edge of the reinforcing plate 18 into a U-shape and inserting the other end 17c of the torsion spring 17 therein, the third
The same effects as the embodiment shown in the figure can be achieved.

Further, as shown in FIG.
7e, sandwiched by side ribs 22a from both sides, and a rib wall 22b provided in front of the L-shaped bent portion 20, the twist spring 17 is inserted before the reinforcing plate 18 is fixed to the lid body 11 with the screws 19 during assembly. By inserting the bent portion 17e into the pilot hole 21a and sliding it sideways, it passes through the horizontal hole 21b and opens the opening 2.
Penetrate to 1. Then, the reinforcing plate 18 is attached to the lid body 11.
This bent portion 17e is placed in a fixed position with
is inserted into the space formed by the side rib 22a and the wall rib 22b. This causes the twist spring 17
Since the movement of the other end 17c is restricted by the upper, lower, right, left, and rear sides, the torsion spring 17 does not come off from the lid body 11, and rotational wobbling can be prevented, so that workability during assembly is improved.

Further, as shown in FIG. 6, if the reinforcing plate 18 is formed into a concave shape along the bent portion 17e of the torsion spring 17, the same effect as the embodiment shown in FIG. 5 can be obtained.

Furthermore, the bent portion 17e of the torsion spring 17 shown in FIG. 5 is bent at a substantially right angle, but by making this bend into a predetermined obtuse angle and pulling it with a predetermined tensile force, it can be removed, and when a predetermined pushing force is applied. By twisting and pushing in, the bending portion 17e can be bent to allow attachment and detachment, improving workability during assembly and repair.

In addition, since the reinforcing plate 18 is made of metal, it will not soften or deteriorate even if exposed to high temperatures during cooking, and can withstand long-term use and has the rigidity to withstand strong elastic forces. The reinforcing plate 18 itself will not be deformed.

Furthermore, when the lid 11 is opened, a stress opposite to that when it is closed is applied to the other end 17, but since the opening 21 supports this stress, no force is applied to parts such as an inner case (not shown) provided on the inner surface of the lid 11. Therefore, parts such as the inner case can also be prevented from being deformed.

Further, in the above embodiment, metal is used for the reinforcing plate 18, but it goes without saying that the same effect can be achieved by using other materials with excellent rigidity.

〔Effect of the invention〕

As explained above, according to the present invention, by providing the reinforcing plate on the upper surface portion facing the inner upper surface portion of the lid and the peripheral edge portion facing the peripheral edge portion continuous to this upper surface portion, other than the urging member. The reinforcing plate receives the elastic force applied to the edge and disperses this elastic force, thereby preventing damage such as local deformation and cracking of the lid.

Furthermore, since the bending stress applied to the lid is suppressed, damage such as changes in the bent portion of the lid and cracks can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the invention, FIG. 2 is an exploded perspective view of the shaft, FIG. 3 is an assembled perspective view of the shaft, and FIGS. 4 to 6 show other embodiments. Fig. 7 is a sectional view showing a conventional rice cooker; Fig. 8 is a perspective view of main parts shown;
The figure is a perspective view of the shaft part, and FIG. 9 is an external view. In the figure, 10 is the rice cooker body, 11 is the lid body,
12 is a shaft portion, 12a is a bearing, 12b is a shaft cylinder, 17
is a torsion spring, 17a is a spiral portion, 17b is one end,
17c is the other end, 17e is a bent portion, and 18 is a reinforcing plate. The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A main body including an outer case in which a heater for heating an inner pot is provided and a storage section for accommodating the inner pot; a support frame connected to the outer case and around which the outer pot is fixed near its inner periphery; a lid that covers the opening of the inner pot by engaging with the support frame; a lock mechanism that locks the lid in the closed state. , a lock release operation part for releasing the lock mechanism, a hinge part provided on the support frame at a position apart from the lock mechanism and rotatably supporting the lid, an upper surface facing the inner upper surface part of the lid. a reinforcing plate having a peripheral edge portion opposite to a peripheral edge portion continuous with the upper surface portion, and one end of which is opposite to the peripheral edge portion of the upper surface portion of the reinforcing plate so as to bias the lid in the opening direction; A rice cooker comprising: a biasing member that engages with an engaging portion formed at the other end of the portion and whose other end is attached to the support frame.