JP3795430B2 - Lid brake structure in pressure rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid brake structure in a rice cooker that urges a lid attached to a main body in a direction in which the lid is opened by a hinge spring.
[0002]
[Prior art]
In rice cookers, a hinge spring is attached to the hinge portion at the back of the main body so that the lid can be opened quickly. However, simply urging the lid in the opening direction by the hinge spring will open the lid vigorously and be shockedly stopped at the maximum open position. For this reason, Japanese Patent Application Laid-Open No. 11-56614 and Japanese Patent Application Laid-Open No. 2000-350655 disclose a structure that prevents a shocking lid from being opened and stopped by providing a brake structure at the hinge portion.
In the brake structure disclosed in Japanese Patent Application Laid-Open No. 11-56614, a fitting portion is formed in a part of a lid, and this fitting portion is locked to a hinge cover fixed to the main body. Also, in the brake structure disclosed in Japanese Patent Application Laid-Open No. 2000-350655, a plate-like elastic body is attached to either the main body or the lid, and this plate-like elastic body is brought into contact with either the main body or the lid. ing.
[0003]
[Problems to be solved by the invention]
In the brake structure described in Japanese Patent Laid-Open No. 11-56614, since a hinge cover molded from a synthetic resin material is engaged in the same manner as a part of a cover molded from a synthetic resin material, it is There is a disadvantage that wear and strength are weak. In particular, in the pressure-type rice cooker that has recently become popular, the lid itself is heavy on the structure, and the impact on the brake structure also increases. In addition, the brake structure disclosed in Japanese Patent Laid-Open No. 2000-350655 can eliminate the above-mentioned drawbacks of the prior art by using a metal as a plate-like elastic body. Since it is attached, the number of parts increases and the number of assembly steps increases, resulting in a cost increase.
In view of the above drawbacks of the prior art, an object of the present invention is to provide a lid brake structure which is excellent in strength and has a small number of parts.
[0004]
[Means for Solving the Problems]
As for the rice cooker, the lid | cover and the main body are normally shape | molded with the synthetic resin material. In such a rice cooker, what has improved rice cooking efficiency and cooked delicious rice by recently cooking in a high-pressure state is widely used as a pressure rice cooker. In this pressure rice cooker, a large load acts on the main body and the lid, and therefore, for example, a reinforcing member made of sheet metal is often disposed on a part of the main body.
The present invention is to form the hinge reinforcement portion 11 is raised up the back of the sheet metal part 2 that disposed in the body for the purpose of reinforcement of the body 1 is molded in such a synthetic resin material, the upper hinge reinforcement 11 The brake structure is configured such that the brake piece 3 protrudes toward the front and the brake piece 3 is brought into contact with a part of the cover 4 when the cover 4 is opened at a certain angle or more , thereby preventing the cover from being opened excessively. Thereby, the lid brake structure in the pressure type rice cooker with few parts and excellent strength can be realized.
The tip portion of the brake piece 3 that protrudes upward from the hinge reinforcing portion is curved toward the back surface, and a contact portion 5 that contacts the brake piece 3 is formed on a part of the lid 4. It is preferable to leave. The shape of the contact portion 5 is configured as an inclined surface that approaches the brake piece 3 as the opening angle of the lid 4 increases and contacts the brake piece 3 at a predetermined lid opening angle, thereby stopping the opening of the lid. The impact will be as low as possible.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a lid brake structure in a pressure rice cooker according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view of the entire pressure rice cooker with a part cut away, and FIG. 2 is a perspective view of a sheet metal part which is a reinforcing part of the main body.
[0006]
The pressure-type rice cooker shown in FIG. 1 covers the upper surface of the pot 6 disposed inside the main body 1 with an openable / closable lid 4 and heats the pot 6 by heating means such as induction heating or a heater, although not shown. And cooking rice. The lid 4 covering the upper surface of the hook 6 is pivotally supported on the main body by a shaft 7 at the back, and serves as a hinge portion that opens and closes around the shaft 7. The hinge portion between the main body 1 and the lid 4 is covered by a hinge cover 8. A hinge spring 9 is attached to the hinge portion between the main body 1 and the lid 4, the lid 4 is urged in the opening direction with respect to the main body 1, and the locked state by the lock button 10 on the front side is released. The lid 4 is automatically opened by the force of the hinge spring 9.
[0007]
A steam passage 12 is provided in the lid that covers the upper surface of the pot 6, and the steam generated in the pot 6 is discharged outside the container. By adjusting the discharged steam pressure, the inside of the pot is kept at a high pressure, Cooking rice can be cooked under high pressure. In such a pressure rice cooker, a relatively large force acts on both the lid 4 and the main body 1 due to the internal pressure. Therefore, in a pressure rice cooker, a reinforcing member made of metal and a reinforcing member made of normal sheet metal are arranged on both the main body 1 and the lid 4 which are usually molded with a synthetic resin material to improve the strength.
[0008]
As a result of reinforcing the lid 4 with a sheet metal reinforcing member or the like, the lid of the pressure rice cooker is heavier than the non-pressure rice cooker, and the inertia when the lid is opened increases. On the other hand, a reinforcing member as shown in FIG. 2 is arranged as a sheet metal part 2 on the back of the top wall of the main body 1 around the outer periphery of the hook 6 to improve the strength. On the back of the sheet metal part 2, there is provided a hinge reinforcing portion 11 which is vertically raised, and the brake pieces 3 and 3 are projected upward from the upper edge of the hinge reinforcing portion 11 in two places in the drawing. As shown in FIG. 3, the two brake pieces 3, 3 formed on the sheet metal part 2 project only the tip of the brake pieces 3, 3 upward on the upper surface of the main body 1, specifically, the hinge structure part. When the lid 4 that opens and closes around the shaft 7 opens more than a certain angle, a part of the lid abuts against the brake piece 3 and functions as a brake.
[0009]
The shape and structure of the brake piece 3 protruding above the main body 1 and the lid of the portion where the brake piece 3 hits may be any shape and structure as long as it functions as a brake. However, in order to realize a stable braking action with less impact as a brake structure, in the illustrated embodiment, as shown in FIGS. 2 and 4, the upper end of the brake piece 3 is curved in an arc shape toward the back surface, A contact portion 5 is formed in a part of the lid with which the brake piece abuts.
[0010]
The abutting portion 5 formed on the lid 4 is formed so as to protrude from a portion of the lid so as to be thick, and has excellent strength and wear resistance, and the shape thereof is formed as an inclined surface. The brake structure is designed to reduce impact. That is, the brake piece 3 is positioned on the rotation locus of the contact portion 5 with the shaft 7 as the center, and the contact portion 5 is formed on an inclined surface. This inclined surface is an inclined surface in which the upper part of the contact portion is located outside the locus and the lower part enters the inside of the locus with respect to the locus X having the axis 7 as the center and the radius to the brake piece 3 as the radius. is there. And the contact part 5 formed in a part of cover is arrange | positioned in the positional relationship contact | abutted to the brake piece 3 which protrudes from the main body 1 in a predetermined cover open angle.
[0011]
With the above configuration, when the lid is unlocked in the closed state shown in FIG. 4A, the lid 4 is opened quickly and vigorously by the elastic force of the hinge spring 9, and the lid 4 is moved to a predetermined level. When the opening angle is reached, the brake piece 3 comes into contact with the contact portion 5 formed as an inclined surface as shown in FIG. In this contact state, since the synthetic resin contact portion 5 contacts the metal brake piece 3 curved in an arc shape with an inclined surface, the brake is applied to open the cover and the opening of the cover 4 is stopped. The At this time, an appropriate braking action is realized by the flexibility of the contact portion which is a synthetic resin material and the elasticity of the metal brake piece 3. That is, by adopting the configuration of the illustrated embodiment, the collision phenomenon between the lid and the main body is avoided when the lid is opened, and the impact due to the rapid stop is absorbed.
[0012]
In the illustrated example, the sheet metal member formed as the brake piece 3 is formed as an integral reinforcing member disposed on the entire top wall of the main body 1, but does not extend over the entire top wall of the main body as a reinforcing member, for example, a hinge In some cases, it is arranged only in the structure portion. Therefore, you may form the brake piece 3 in a sheet-metal member smaller than the example of illustration .
[0013]
In the case where a part of the lid is in contact with the upper end of the brake piece 3 that protrudes largely upward with a narrow width as in the illustrated example, the brake piece itself functions as a spring to some extent, and exhibits a buffering effect. The brake piece 3 does not necessarily function as a spring. For example, the sheet metal member does not need to be formed of spring steel. Depending on the type of the sheet metal member that forms the brake piece 3, it is assumed that the rigidity is large and does not elastically deform, and the strength can be further improved.
[0014]
【The invention's effect】
According to the lid brake structure of the pressure rice cooker of the present invention as set forth in claim 1, the back part of the sheet metal part disposed in the main body is raised to form the hinge reinforcing part, and the brake piece is directed upward from the hinge reinforcing part. the Ru is projected. Therefore, the brake structure is a structure in which the brake piece, which is a part of the metal sheet metal member , and the lid come into contact with each other, so that the strength is excellent and the wear resistance is also excellent. This is extremely effective in the pressure rice cooker according to the present invention in which the structural lid itself is heavy. And this metal brake piece does not use an independent part as a brake piece, but is formed on a member to be mounted for another purpose, thus reducing the number of parts and processes and reducing the cost. There is an effect that can be measured.
[0015]
According to the second aspect of the present invention, when implementing the first aspect of the present invention, it is possible to realize a brake structure in which the braking action is smoothly performed with less impact.
[Brief description of the drawings]
FIG. 1 is a side view of the whole rice cooker, with a part cut away,
FIG. 2 is a perspective view of the entire reinforcing part of the main body, which is an example of a sheet metal part;
FIG. 3 is a rear view of a hinge structure portion of the main body,
FIG. 4 is a schematic cross-sectional view showing a positional relationship between a brake piece of a main body and a contact portion of a lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Sheet metal part, 3 ... Brake piece, 4 ... Cover, 5 ... Contact part, 6 ... Hook, 7 ... Shaft, 8 ... Hinge cover, 9 ... Hinge spring, 10 ... Lock button, 11 ... Hinge reinforcement Department.

Claims (2)

In a pressure rice cooker that places a sheet metal part in the main body as a reinforcing member of the main body molded with a synthetic resin material and biases it in the direction to open the lid by attaching a hinge spring, the back of the sheet metal part to be placed in the main body The hinge reinforcement is raised to form a hinge reinforcement, and the brake piece protrudes upward from the hinge reinforcement, and the lid is brought into contact with a part of the lid when the lid opens more than a certain angle. The lid brake structure in the pressure-type rice cooker characterized by preventing excessive opening of rice. The tip of the brake piece that protrudes upward from the hinge reinforcing part is curved toward the back side, and a contact part that contacts the brake piece is formed on a part of the cover, 2. The lid brake structure in a pressure rice cooker according to claim 1 , wherein the lid brake structure is formed as an inclined surface that approaches the brake piece as the opening angle increases and contacts the brake piece at a predetermined lid opening angle.

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