JP4256376B2 - rice cooker - Google Patents

Description

  This invention relates to the rice cooker provided with the lid main body attached to the container which accommodates a rice cooking pan, and the inner lid which obstruct | occludes the said rice cooking pan.

  In this type of rice cooker, a steamer opening that connects the rice cooker and the outside of the rice cooker with the lid body attached to the body containing the rice cooker so that it can be opened and closed by a hinge mechanism and biased in the opening direction. Is provided.

  It is desirable that the inner lid be able to be washed with water because it becomes dirty with a rice pad. For this reason, conventionally, the inner lid has been made removable. For example, in a non-pressure cooking type or a rice cooker with a small rice cooking capacity, the lid size is relatively small, so a bush fitted into the mounting shaft protruding on the bottom surface of the lid body is provided on the inner lid, and the bush is attached A simple lid structure is adopted in which the inner lid can be attached to and detached from the lid body by close contact / detachment of the shaft (see Patent Document 1).

  In the rice cooker of the above-mentioned patent document 1, while the lid main body is closed, the inner lid and the flange of the rice cooking pan come into contact with each other, and the bush is pushed by the lid main body so as to be elastically repelled. . A contact pressure is generated between the inner lid and the flange due to the elastic repulsion of the bush, and leakage of steam and steam from between the inner lid and the flange is prevented. For this reason, the lid packing for sealing between the inner lid and the flange is not provided.

  However, in the lid structure as in Patent Document 1, the inner lid slightly fluctuates up and down along the mounting axis due to convection and steam pressure during rice cooking, and the rice cooking pot vibrates. A small amount of steam may leak from between the flanges. This leaked steam leaks out of the container from the joint between the lid body and the container. For this reason, the surface of the lid main body or the container body may become cloudy due to the vapor leaking outside the container.

  In view of this, it is conceivable that a lid packing is detachably provided on the outer periphery of the inner lid instead of a sealing structure by surface contact between the inner lid and the flange. Since this lid packing is contaminated with a towel or the like, it is desirable to provide the lid packing in a detachable manner.

JP-A-10-201619 (FIGS. 1 to 3, [0002], [0003])

  However, if both the inner lid and the lid packing are detachable, the user holds the inner lid in an arbitrary direction and attaches the lid packing, so that the inner lid is attached to the lid body with the mounting direction of the lid packing being wrong. There is a risk of wearing.

  Accordingly, an object of the present invention is to prevent both the inner lid and the flange from leaking from between the inner lid and the flange regardless of the mounting direction of the lid packing, while providing both the inner lid and the lid packing in a detachable manner. .

  In order to solve the above-described problems, the present invention provides a rice cooker including a lid body attached to a container body that accommodates a rice cooking pan so as to be opened and closed, and an inner lid that closes the rice cooking pan. A mounting portion for attaching to and detaching from the lid body is provided at a portion radially inward of the periphery, and an annular lid packing is provided in the outer periphery of the inner lid so as to be detachably grooved. An attachment direction in which one side peripheral portion with the center of the groove bottom of the joint groove is in close contact with the upper surface side of the inner lid and the other side peripheral portion is in close contact with the lower surface side of the inner lid, and the one side periphery The groove can be fitted to the outer peripheral edge of the inner lid in any of the mounting directions in which the portion is brought into close contact with the lower surface side of the inner lid and the other side peripheral portion is brought into close contact with the upper surface side of the inner lid. Even in the mounting direction, the side peripheral portion that is in close contact with the lower surface side of the inner lid is Adopting a structure which is pressed against the flange of the cooking pot by moving.

A lock for attaching / detaching the inner lid to / from the lid body at the outer edge of the inner lid by adopting a configuration in which a mounting portion for attaching / detaching to the lid body is provided at a portion radially inward of the outer edge of the inner lid. The inner lid can be attached to and detached from the lid body without providing a structure.
Further, it is possible to employ a configuration including an annular lid packing that is detachably fitted to the outer peripheral edge of the inner lid by utilizing the absence of a lock structure on the outer peripheral edge of the inner lid.
Here, in this lid packing, one side peripheral portion with the center of the groove bottom of the fitting groove as a boundary is brought into close contact with the upper surface side of the inner lid, and the other side peripheral portion is brought into close contact with the lower surface side of the inner lid. The mounting direction and the one side peripheral portion are brought into close contact with the lower surface side of the inner lid, and the other side peripheral portion is brought into close contact with the upper surface side of the inner lid with respect to the outer peripheral edge of the inner lid. By adopting a configuration in which the groove can be fitted, the lid packing firmly bites along the outer peripheral edge of the inner lid in any mounting direction.
In any mounting direction, the side peripheral portion that is in close contact with the lower surface side of the inner lid adopts a configuration in which the lid body is pressed against the flange of the rice cooker by the closing movement of the lid main body, thereby the lid packing. In any of the mounting directions, the inner lid and the rice cooker are not moved by pressing when the side peripheral portion is pressed, and the side peripheral portion is in close contact with the lower surface side of the inner lid while the lid body is in the closed state. A sealed state is maintained between the pan.
Therefore, according to the configuration of the present invention, both the inner lid and the lid packing are provided in a detachable manner, and the toy and steam are not leaked from between the inner lid and the flange regardless of the mounting direction of the lid packing. Can do.

In the above configuration, the outer peripheral edge of the inner lid has a standing wall shape having a height on the upper surface side of the inner lid, and the one side peripheral portion has a cross-sectional hook shape that engages with the outer peripheral edge of the inner lid in the radial direction. By adopting such a configuration, the outer peripheral edge of the inner lid is formed into a standing wall shape having a height on the upper surface side, so that the rigidity of the outer peripheral edge of the inner lid is increased. For this reason, the outer peripheral edge of the inner lid is hardly deformed when the side peripheral portion is pressed, and as a result, the sealing effect of the lid packing can be more reliably exhibited.
Further, in the case of the mounting direction in which the one side peripheral portion is in contact with the upper surface side of the inner lid, the one side peripheral portion engages with the outer peripheral edge of the inner lid in the radial direction over the upper end. Since it is in a combined state, the mounting strength of the lid packing is higher than that in the case where it is simply in plane contact with the inner lid.
Also, in the case of the mounting direction in which the one side peripheral portion is in contact with the lower surface side of the inner lid, the one side peripheral portion hits against the lower surface of the inner lid, and the cross section protrudes downward from the bowl shape. Deforms into a lip shape. As a result, the contact pressure between the one side peripheral portion and the flange is higher than that in the case of planar contact, and the sealing effect in the mounting direction can be obtained more reliably.

  Further, in the configuration in which the outer peripheral edge of the inner lid has a standing wall shape and the one side peripheral portion has a bowl-like cross section, in the case of the mounting direction in which the one side peripheral portion is in close contact with the lower surface side of the inner lid, If the other side peripheral portion opposite to the one side peripheral portion is interposed between the inner lid and the lid main body and is in an elastic compression state by closing the lid main body, the other side peripheral portion is adopted. Also by the elastic repulsive force of the side peripheral portion, the one side peripheral portion is pressed against the flange, and the sealing effect in the mounting direction can be further enhanced.

In the above configuration, the configuration in which the side peripheral portion that is in close contact with the upper surface side of the inner lid and the lid main body are in contact with the lid main body closed is ideal in terms of preventing rattling of the inner lid.
However, actually, even if the above-mentioned contact is determined by design, a gap may be formed between the side peripheral portion and the lid body due to a molding error of each member.

  Therefore, in the above-described configuration, a part of the one side peripheral portion is a protruding portion facing the lid main body in the mounting direction in which the one side peripheral portion is in close contact with the upper surface side of the inner lid. If a structure is employ | adopted, the protrusion part will suppress the backlash of an inner cover by setting the attachment direction which closely contacts one side peripheral part to the upper surface side of an inner cover as a regular attachment direction. Of course, if a part of the other side peripheral portion is a similar protruding portion, backlash of the lid can be suppressed in any mounting direction.

    Here, the said protrusion part can employ | adopt the structure pressed on the said flange of the said rice cooking pot in the case of the attachment direction which makes the said one side peripheral part closely_contact | adhere to the lower surface side of the said inner lid. According to this configuration, as a result of the reduction in the contact area between the one side peripheral portion and the flange, the contact pressure is further increased at the protruding portion as compared with the case where both portions are in contact with each other flatly. The effect can be further enhanced.

  In the above configuration, the attachment portion of the inner lid includes a bush for fitting a mounting shaft protruding on the lower surface of the lid body, and when the lid body is closed without attaching the lid packing, If the lid and the flange of the rice cooker are in contact with each other, and if the bush is in an elastically compressed state due to the closing movement of the lid body, rice cooking is carried out with the lid packing forgotten attached However, it is possible to suppress the leakage of steam and steam as much as possible.

  As described above, according to the present invention, both the inner lid and the lid packing are provided in a detachable manner, so that a toy and steam do not leak from between the inner lid and the flange regardless of the mounting direction of the lid packing. be able to.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment of the present invention will be described below with reference to the accompanying drawings.
The rice cooker shown in FIG. 1 includes a lid body 3 attached to a body 2 that houses a rice cooking pot 1 and an inner lid 4 that closes the rice cooking pot 1.

  The lid body 3 is provided so that it can be opened and closed by a hinge mechanism 5 at the rear of the container. When the lid hook 6 of the lid main body 3 is hooked on the hook receiver 7 of the body shoulder portion 2a, the lid body 6 closes against the body shoulder portion 2a against the urging in the opening direction by the kick spring 8.

  A mounting shaft 9 that protrudes at the center of the lower surface of the lid body 3 is provided, and a bush 10 (attachment portion for attachment / detachment) that fits the mounting shaft 9 is provided in a portion radially inward of the outer peripheral edge 4a of the inner lid 4. ing. When the mounting shaft 9 is fitted, the bush 10 is elastically adhered to the outer periphery of the mounting shaft 9. Thereby, the inner lid 4 is attached to the lid main body 3 on the radially inner side with respect to the outer peripheral edge 4a. When the inner lid 4 is pushed down by placing a finger between the annular lid packing 11 and the lid ring 3a that are detachably fitted to the outer peripheral edge 4a, the bush 10 is detached from the mounting shaft 9 and detached. Then, it comes off from the lid body 3.

  As shown in FIG. 1 and FIG. 2, the outer peripheral edge 4 a of the inner lid 4 has a standing wall shape having a height h on the upper surface side of the inner lid 4, and when the lid body 3 is closed, the flange 1 a of the rice cooker 1. It is provided so that it may be located above. A flat surface 4b is formed on the lower surface side of the inner lid 4 along the outer peripheral edge 4a.

  As shown in FIG. 3, the flat surface 4 b is provided so as to come into contact with the flange 1 a of the rice cooker 1 when the lid body 3 is closed without the lid packing 11 being attached. This surface contact occurs before the lid body 3 is in the closed state. For this reason, the lid body 3 is further closed with the surface contacted, and the upper telescopic wheel 10a of the bush 10 is pushed by the lid body 3 to be in a compressed state (see FIG. 1). That is, the upper telescopic wheel 10a generates an elastic repulsive force. The elastic repulsive force pushes the inner lid 4 downward as a whole, and the flat surface 4b and the flange 1a of the rice cooker 1 come into contact with each other with contact pressure. Therefore, even if rice cooking is started with the lid packing 11 not attached, most of the steam during cooking is discharged from the steam port pipe 12 provided so as to penetrate the inner lid 4 and the lid main body 3. No leakage from between the lid 4 and the flange 1a.

  In the original use state, as shown in FIGS. 2 and 4, the lid packing 11 is detachably fitted to the outer peripheral edge 4 a of the inner lid 4 through the fitting groove 11 a. For this reason, it becomes possible to remove the lid packing 11 and wash with water or soak, and to ensure good cleanability.

  Of the lid packing 11, one side peripheral portion 11 b with the groove bottom center C of the fitting groove 11 a as a boundary has a bowl-shaped cross section that engages with the outer peripheral edge 4 a of the inner lid 4 in the radial direction. A part of the other side peripheral portion 11c opposite to the one side peripheral portion 11b is a tongue-like protruding portion 11d that protrudes to the other side and radially inward from the outer peripheral edge of the inner lid. .

  As shown in FIG. 5A, the lid packing 11 has one side peripheral portion 11 b in close contact with the upper surface side of the inner lid 4 and the other side peripheral portion 11 c in close contact with the lower surface side of the inner lid 4. (Hereinafter, simply referred to as a regular mounting direction), and as shown in FIG. 5B, one side peripheral portion 11b is brought into close contact with the lower surface side of the inner lid 4, and the other side peripheral portion 11c is connected to the inner lid 4. In any case of the mounting direction (hereinafter simply referred to as the reverse attachment direction) in close contact with the upper surface side of the inner cover 4, it has flexibility to be fitted to the outer peripheral edge 4 a of the inner lid 4 while being gradually extended in the diameter increasing direction.

  A case where the lid packing 11 is in the normal mounting direction will be described with reference to FIG. One side peripheral portion 11 b is in close contact with the upper end of the outer peripheral edge 4 a of the inner lid 4 so as to be hooked in the radial direction, and the other side peripheral portion 11 c is in close contact with the flat surface 4 b of the inner lid 4. The protruding portion 11d protrudes from the outer peripheral edge 4a of the inner lid 4 to the other side, that is, the lower side and the radially inner side. In FIG. 5A, the natural state of the protruding portion 11d is indicated by an imaginary line.

  When the lid body 3 is closed, as described above, the flat surface 4b of the inner lid 4 is provided so as to contact the flange 1a of the rice cooker 1, so that the protruding portion 11d has the inner lid 4 and the flange 1a. The lid body 3 is pressed against the flange 1a. This reliably prevents leakage of rice balls and steam from between the inner lid 4 and the flange 1a.

  Next, the case where the lid packing 11 is in the reverse direction will be described with reference to FIG. One side peripheral portion 11 b is in close contact with the flat surface 4 b of the inner lid 4, and the other side peripheral portion 11 c is hooked on the upper end of the outer peripheral edge 4 a of the inner lid 4. Here, since the one side peripheral portion 11b has a bowl-shaped cross section as described above, when it hits the flat surface 4b, it collapses into a convex lip shape below its flexibility.

  When the lid body 3 is closed, as described above, the flat surface 4b of the inner lid 4 is provided so as to come into contact with the flange 1a of the rice cooker 1, so that one side peripheral portion 11b is in contact with the flange 1a. The lid body 3 is pressed against the flange 1a. This reliably prevents leakage of rice balls and steam from between the inner lid 4 and the flange 1a.

  As described above, regardless of the direction in which the lid packing 11 is attached, one of the side peripheral portions 11b and 11c is always pressed against the flange 1a by the lid body 3, so that the inner lid 4 and the rice cooker 1 are fine. Even if it fluctuates, it is possible to prevent leakage of steam and steam from between the inner lid 4 and the flange 1a.

  In this embodiment, since the one side peripheral part 11b is provided in a cross-sectional shape, the outer peripheral edge 4a of the inner lid 4 is formed as a standing wall having a height on the upper surface side while increasing the rigidity of the outer peripheral edge 4a. When the side peripheral portion 11b is in the normal mounting direction, the outer peripheral edge 4a of the inner lid 4 is engaged with the outer peripheral edge 4a in the radial direction, and the mounting strength of the lid packing 11 is more than that in the case where the side peripheral portion 11b is simply in plane contact with the upper surface of the inner lid 4. (See FIG. 5A).

  Further, since the one side peripheral portion 11b is crushed into a lip shape in the reverse attachment direction, the contact pressure between the one side peripheral portion 11b and the flange 1a is increased as compared with the case of planar contact (FIG. 5). (See (b)). That is, if the one side peripheral portion 11b has a bowl shape in cross section, the sealing effect by the one side peripheral portion 11b can be further enhanced. The reason why the upper end side of the outer peripheral edge 4a of the inner lid 4 is rounded is to prevent the cut when the lid packing 11 is attached and detached and to further increase the rigidity.

  In this embodiment, the other side peripheral portion 11c and the protruding portion 11d are interposed between the inner lid 4 and the lid body 3 in the reverse direction, and the lid body 3 is closed. It is provided so as to be in an elastically compressed state (see FIG. 5B). Specifically, the protruding portion 11d of the other side peripheral portion 11c has a shape that protrudes to the other side, that is, the upper side, and radially inward from the outer peripheral edge 4a of the inner lid 4 in the reverse attachment direction. Therefore, it is interposed between the inner lid 4 and the lid body 3. When the lid body 3 is closed between the lower surface of the lid body 3 and the flange 1a, the protruding portion 11d is bent radially inward by the closing operation of the lid body 3 after one side peripheral portion 11b hits the flange 1a. Is provided. When the lid body 3 is in the closed state, the projecting portion 11d generates an elastic repulsive force having a vertical component in the gap between the outer peripheral edge 4a of the inner lid 4 and the lid main body 3, and the inner lid 4 is moved to the outer peripheral edge 4a. Along the flange 1a. As a result, one side peripheral portion 11b is pressed against the flange 1a by the elastic repulsive force of the protruding portion 11d in addition to the elastic repulsive force of the upper telescopic ring 10a of the bush 10, so that the sealing effect is more reliably exhibited. It becomes like this.

  Further, in this embodiment, between the lower surface of the lid body 3 and the flange 1a, the other side peripheral portion 11c is in close contact with the upper end of the outer peripheral edge 4a of the inner lid 4 in the reverse direction. Although the space is sufficient for interposing the protruding portion 11d, the outer peripheral edge 4a of the inner lid 4 and the lid main body 3 are separated in the case of the normal mounting direction (see FIG. 5A). . Therefore, a part of the one side peripheral portion 11b is a protruding portion 11e that faces the lid main body 3 in the case of the regular attachment direction. Thereby, the vertical movement of the inner lid 4 in the regular attachment direction is suppressed by the protruding portion 11e.

  Moreover, the protrusion part 11e is provided so that it may be pressed on the flange 1a of the said rice cooking pot 1 in the said reverse direction (refer FIG.5 (b)). Thereby, the contact area of said one side peripheral part 11b and the flange 1a reduces compared with the case where both parts contact flatly. As a result, the contact pressure is further increased at the protruding portion 11e, so that the sealing effect by the one side peripheral portion 11b is further enhanced.

  The protrusion 11d on the other side peripheral portion 11c side is interposed between the lid body 3 and the inner lid 4 in the reverse attachment direction and is in an elastic compression state. Further, the vertical movement of the inner lid 4 is suppressed by the protruding portion 11d (see FIG. 5B). Further, in the case of the normal mounting direction, the protruding portion 11d seals between the inner lid 4 and the flange 1a to prevent vapor leakage (see FIG. 5A).

  Further, in this embodiment, the flat surface 4b of the inner lid 4 and the flange 1a are in a positional relationship in which they contact each other before the lid main body 3 is closed when the lid packing 11 is not attached. It is also possible to adopt a positional relationship that results in a non-contact closed state. For example, the protrusion 11d may be pressed against the flange 1a in the normal mounting direction, and the one side peripheral portion 11b may be pressed against the flange 1a due to elastic repulsion of the protrusion 11d in the reverse direction. .

Sectional drawing which shows the whole rice cooker structure which concerns on embodiment. (A) Bottom view of the inner lid of FIG. 1, (b) Cross-sectional view of the inner lid of (a) 1 is an enlarged cross-sectional view showing the outer peripheral edge portion of the inner lid in a state where the lid packing of FIG. 1 is not attached. 1 is an enlarged cross-sectional view of the lid packing of FIG. (A) Operation diagram when the lid main body is closed in the normal mounting direction of the lid packing of FIG. 1, (b) Operation diagram when the lid main body is closed in the reverse direction of the lid packing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rice cooker 1a Flange 2 Body 2a Body shoulder 3 Lid body 4 Inner lid 4a Outer peripheral edge 4b Flat surface 5 Hinge mechanism 6 Lid hook 7 Hook receiver 8 Kick spring 9 Mounting shaft 10 Bush 10a Upper telescopic ring 11 Lid packing 11a Fitting groove 11b One side peripheral part 11c The other side peripheral part 11d, 11e Protruding part 12 Steam port pipe

Claims (5)

In a rice cooker comprising a lid body attached to a container housing a rice cooking pan so as to be openable and closable, and an inner lid for closing the rice cooking pot, the lid body on a portion radially inward of the outer peripheral edge of the inner lid And an annular lid packing that is detachably fitted to the outer peripheral edge of the inner lid, and this lid packing is one of which is centered on the groove bottom center of the fitting groove. The side circumference is brought into close contact with the upper surface side of the inner lid, the mounting direction in which the other side circumferential portion is brought into close contact with the lower surface side of the inner lid, and the one side circumferential portion is brought into close contact with the lower surface side of the inner lid, The groove can be fitted to the outer peripheral edge of the inner lid in any of the mounting directions in which the other side peripheral portion is in close contact with the upper surface side of the inner lid. The side peripheral part that is in close contact with the side is pressed against the flange of the rice cooker by closing the lid body. Is as on the outer periphery of the inner lid and the upright wall shape having a height on the upper surface side of the inner lid, the lower surface of the inner lid to form a flat surface along the outer peripheral edge, said one side of the In the case of the mounting direction in which the peripheral portion is in close contact with the upper surface side of the inner lid, the outer peripheral edge of the inner lid and a cross-sectional hook shape that engages in the radial direction over the upper end , and the one side peripheral portion is the inner lid In the case of the mounting direction in close contact with the lower surface side, when the one side peripheral portion hits the flat surface, a corner portion that bends downward in a cross-sectional shape due to its flexibility is projected downward at the position pressed against the flange. Rice cooker characterized by being transformed into a lip shape . The mounting portion of the inner lid includes a bush for fitting a mounting shaft protruding on the lower surface of the lid main body. When the lid main body is closed without mounting the lid packing, the flatness of the inner lid is The rice cooker according to claim 1 , wherein the surface and the flange of the rice cooker come into contact with the surface, and the bush is in an elastically compressed state by the closing movement of the lid body. Some of one side periphery above, the side peripheral portion of one the can toward the lid body in the case of a mounting direction to be close contact with the upper surface of the inner lid, and suppress the vertical movement of the inner lid The rice cooker according to claim 2 , wherein the rice cooker is a protruding portion, and steam is discharged from a steam port pipe provided so as to penetrate the lid body and the inner lid . 4. The rice cooker according to claim 3 , wherein the protruding portion is pressed against the flange of the rice cooker in an attachment direction in which the one side peripheral portion is in close contact with the lower surface side of the inner lid. In the mounting direction in which the one side peripheral portion is in close contact with the lower surface side of the inner lid, the other side peripheral portion opposite to the one side peripheral portion is interposed between the inner lid and the lid body. And the rice cooker in any one of Claim 1 to 4 which will be in an elastic compression state by the closing movement of the said lid body.

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