JP2022017677A - Pressure-type cooker - Google Patents

Abstract

To minimize the production cost of a lid of a pressure-type cooker.SOLUTION: A pressure-type cooker 100 has a body 110, an inner container 130 that is stored in the body and is opened upward, and a lid 140 that includes a substrate member 144 having reinforcement parts TS, RS, is attached to the body openably/closably, and covers the opening of the inner container. The reinforcement part is made of resin and covers at least the half region of the opening of the inner container in planar perspective view when the lid is in a closed state.SELECTED DRAWING: Figure 4

Description

The present invention relates to a pressure cooker such as a pressure cooker.

In the past, "a cooker body that houses a pot, a lid that has an inner lid that closes the upper end opening of the pot, and a reinforcing body that prevents deformation of the lid due to the pressure of steam generated during cooking. A lid reinforcing body having an opening at a position corresponding to the inner lid is provided, and the lid body is supported by abutting against the central portion of the inner lid from above at least during cooking. A "heating cooker in which a support portion is provided" has been proposed (see, for example, Japanese Patent Application Laid-Open No. 2018-057535).

Japanese Unexamined Patent Publication No. 2018-057535

By the way, in a cooking device as described above, the lid reinforcing body of the lid is often a sheet metal member. In such a cooking device, the material cost of the lid reinforcing body becomes high, and it becomes necessary to provide a grounding structure for grounding. Therefore, in such a cooking device, the manufacturing cost of the lid is high.

An object of the present invention is to reduce the manufacturing cost of the lid of the pressure cooker as much as possible.

The pressure type cooker according to the present invention is
With the main body
An inner container housed in the main body and opened upward,
A substrate member having a reinforcing portion, a lid that is openable and closable to the main body and covers the opening of the inner container, is provided.
The reinforcing portion is made of resin and covers at least half the area of the opening of the inner container in plan perspective when the lid is closed.

According to the above configuration, a resin whose material cost is relatively cheaper than that of metal is used as the material of the reinforcing portion, and it is not necessary to provide a grounding structure for grounding. Therefore, in this pressure type cooker, the manufacturing cost of the lid can be suppressed as much as possible.

In the present invention
A hinge mechanism having a fixed portion fixed to the main body and a movable portion rotatably attached to the fixed portion is further provided.
It is preferable that the movable portion is fixed to the first end of the substrate member.

According to the above configuration, it is possible to prevent the hinge mechanism from being deformed or damaged due to the reinforcing effect of the reinforcing portion during pressure cooking in which a force is applied to the substrate member, and to prevent the substrate member from coming off from the movable portion. Therefore, in this pressure type cooker, it is possible to reduce the possibility that the lid body will be removed from the main body during pressure cooking.

In the present invention
It is preferable that the reinforcing portion extends from the fixed portion of the movable portion to at least the center of the opening of the inner container in plan perspective when the lid body is in the closed state.

As a result of diligent studies by the inventor of the present application, when the lid is in the closed state, the reinforcing portion is extended from the fixed portion of the movable portion to at least the center of the opening of the inner container in planar fluoroscopy, so that the reinforcing effect of the reinforcing portion is enhanced. It became clear.

In the present invention
The main body has a locking portion and has a locking portion.
A locked portion that is locked to the locking portion when the lid is closed is further provided.
It is preferable that the locked portion is attached to the second end, which is the opposite end of the first end of the substrate member.

According to the above configuration, it is possible to prevent the locked portion from being deformed or damaged due to the reinforcing effect of the reinforcing portion and to prevent the substrate member from coming off from the locked portion during pressure cooking in which a force is applied to the substrate member. Can be done. Therefore, in this pressure type cooker, it is possible to reduce the possibility that the lid will open during pressure cooking.

In the present invention
The reinforcing portion has an upper wall portion, a lower wall portion, and an erection portion erected between the upper wall portion and the lower wall portion.
It is preferable that the truss structure is formed by the upper wall portion, the lower wall portion, and the erection portion.

According to the above configuration, the reinforcing effect of the reinforcing portion can be increased.

In the present invention
The reinforcing portion includes polyphenylene sulfide (PPS), syndiotactic polystyrene (SPS), polysulfone (PSU), polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), and polytetrafluoroethylene. It is preferably formed from at least one resin selected from the group consisting of (PTFE) and polyamideimide (PAI).

The rigidity of the resin is relatively higher than that of general-purpose resins (polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), etc.). Therefore, in this pressure type cooker, the reinforcing effect of the reinforcing portion can be increased. Further, the heat resistance of the above resin is superior to that of the general-purpose resin. Therefore, in this pressure type cooker, it is possible to prevent the reinforcing portion from being thermally deformed and to ensure the safety of food.

It is a perspective view of the rice cooker which concerns on embodiment of this invention. It is a central vertical sectional view of the rice cooker which concerns on embodiment of this invention. It is a perspective view of the substrate member constituting the rice cooker which concerns on embodiment of this invention. In this figure, a claw member and a hinge mechanism are attached to the substrate member, and a pressure adjusting mechanism, a safety mechanism, a steam processing unit, and the like are mounted. It is a perspective view of the substrate member, the claw member, and the hinge mechanism constituting the rice cooker which concerns on embodiment of this invention. It is a side view of the substrate member constituting the rice cooker which concerns on embodiment of this invention. In this figure, a claw member and a hinge mechanism are attached to the substrate member, and a pressure adjusting mechanism, a safety mechanism, a steam processing unit, and the like are mounted.

<Structure of rice cooker according to the embodiment of the present invention>
The rice cooker 100 according to the embodiment of the present invention is an induction heating type pressure rice cooker, and as shown in FIGS. 1 and 2, mainly the main body 110, the inner pot 130, the lid 140 and the hinge. It is composed of a mechanism 150. Hereinafter, these components will be described in detail.

1. 1. Main body As shown in FIG. 2, the main body 110 mainly includes a housing 111, a heat insulating material (not shown), a heat insulating heater 112, an induction heating coil 113, a furnace member 122, and a ferrite core assembly (not shown). , Thermistor 114, blower fan 115, heat sink 116, power supply circuit board 118, self-winding power cord unit 120, and open / close lever mechanism 123. Hereinafter, these components will be described in detail.

(1) Housing As shown in FIGS. 1 and 2, the housing 111 is mainly composed of a side wall 111a, a bottom wall 111b, a shoulder member 111c, and a protective frame 111d, and is a heat insulating material (not shown). ), Insulation heater 112, induction heating coil 113, ferrite core assembly, thermistor 114, blower fan 115, heat sink 116, power supply circuit board 118, self-winding power cord unit 120, and the like. Hereinafter, each component of the housing 111 will be described in detail.

The side wall 111a is an enclosure wall that exhibits a substantially rectangular shape in a plan view, and covers the side surface of the main body 110 as shown in FIGS. 1 and 2. Further, as shown in FIGS. 1 and 2, an opening / closing lever mechanism 123 is arranged on the upper portion on the front side of the side wall 111a.

The bottom wall 111b is a substantially rectangular plate-like body, which is fitted under the side wall 111a as shown in FIGS. 1 and 2 and covers the opening under the side wall 111a. The bottom wall 111b has an intake port Os (see FIG. 2) for sucking in the air outside the housing 111 and an exhaust port for discharging the air inside the housing 111 to the outside (see FIG. 2). (Not shown) is formed. As shown in FIG. 2, a blower fan 115 is arranged directly above the intake port Os. When the blower fan 115 is driven, external air is sucked into the inside of the housing 111 through the intake port Os, and the heated air inside is discharged to the outside of the system from the exhaust port by the air flow generated thereby.

The shoulder member 111c is a frame body having a substantially rectangular shape in a plan view, is fitted on the upper side of the side wall 111a as shown in FIGS. 1 and 2, and covers the opening on the upper side of the side wall 111a. A flange member FP of the protective frame 111d is attached to the lower side of the shoulder member 111c. An opening for passing the inner pot 130 is formed in the central portion of the shoulder member 111c.

The protective frame 111d has a role of accommodating the inner pot 130 and holding the shape of the shoulder member 111c, and is made of a material such as polyethylene terephthalate (PET) resin that easily keeps the shape. As shown in FIG. 2, the protective frame 111d is mainly composed of three members, a flange member FP, an intermediate member MP, and a bottom member BP. As shown in FIG. 2, the flange member FP constitutes an upper portion of the protective frame 111d. Then, the flange member FP is attached to the upper side of the intermediate member MP as shown in FIG. Further, as shown in FIG. 2, the opening / closing lever mechanism 123 is inserted in the front portion of the flange member FP so that the rotation shaft 123a of the opening / closing lever mechanism 123 is inserted into the bearing portion (not shown) of the flange member FP. Is attached. An opening for passing the inner pot 130 is formed in the central portion of the flange member FP. As shown in FIG. 2, the intermediate member MP is a substantially cylindrical member, constitutes an intermediate portion of the protective frame 111d, and is fastened to the bottom member BP. As shown in FIG. 2, the bottom member BP constitutes a lower portion of the protective frame 111d. As shown in FIG. 2, a kamado member 122 is attached to the inside of the bottom member BP. Further, although not shown, a ferrite core assembly is attached to the outside of the bottom member BP. Further, an opening for passing the thermistor 114 is formed in the central portion of the bottom wall of the bottom member BP.

(2) Insulation material The heat insulating material is wound around the side wall of the intermediate member MP of the protective frame 111d, the side wall of the bottom member BP of the protective frame 111d, and the outer periphery of the induction heating coil 113, and heats the induction heating coil 113 during rice cooking. Plays a role of suppressing the outflow to the outside of the intermediate member MP of the protection frame 111d and the outside of the bottom member BP of the protection frame 111d.

(3) Heat Insulation Heater The heat insulation heater 112 is a heating source for keeping the inner pot 130 warm after cooking rice, and is arranged between the intermediate member MP and the inner pot 130 as shown in FIG. .. In addition, the heat retaining heater 112 may be used together with the induction heating coil 113 in order to heat the inner pot 130 not only at the time of heat retention but also at the time of cooking rice.

(4) Induction heating coil The induction heating coil 113 is an induction heating source for inductively heating the inner pot 130, and is located outside the bottom wall and the lower end of the side wall of the bottom member BP of the protective frame 111d as shown in FIG. It is arranged.

(5) Kamado member The kamado member 122 has a role of efficiently storing heat in the inner pot 130, and as shown in FIG. 2, between the inner pot 130 and the bottom member BP of the protective frame 111d. It is arranged. As shown in FIG. 2, the bottom wall of the intermediate member MP of the protective frame 111d is located directly above the upper end of the kamado member 122. That is, the kamado member 122 is attached to the inside of the bottom member BP of the protection frame 111d before the intermediate member MP of the protection frame 111d is fastened to the bottom member BP of the protection frame 111d. Therefore, after the rice cooker 100 according to the embodiment of the present invention is assembled, the kamado member 122 cannot be freely removed from the protective frame 111d like the inner pot 130. Further, as shown in FIG. 2, an opening for passing the thermistor 114 is formed in the central portion of the bottom wall of the kamado member 122.

(6) Ferrite core assembly The ferrite core assembly is arranged around the induction heating coil 113. Then, as described above, the ferrite core assembly is attached to the outside of the bottom member BP of the protective frame 111d. A ferrite core is housed in the ferrite core assembly, and the ferrite core plays a role of suppressing leakage of electromagnetic waves generated from the induction heating coil 113 when energized.

(7) Thermistor Thermistor 114 is a temperature sensor, and as shown in FIG. 2, an opening formed in the central portion of the bottom wall of the bottom member BP of the protective frame 111d and the central portion of the bottom wall of the kamado member 122. It projects upward through the opening formed in. The thermistor 114 is urged upward by an urging member such as a coil spring. That is, the thermistor 114 is in a state where it can freely appear and disappear along the vertical direction. Further, the thermistor 114 is incorporated in an inner pot detection sensor (not shown). The inner pot detection sensor is for determining whether or not the inner pot 130 exists in the rice cooker, and when the thermistor 114 is lowered to the lower end position, a detection signal is transmitted to the microcomputer of the control circuit board 119. do. Upon receiving the detection signal, the microcomputer determines that the inner pot 130 exists in the rice cooker. If the microcomputer determines that the inner pot 130 does not exist in the rice cooker 100, the rice cooking operation is not started.

(8) Blower fan As described above, the blower fan 115 is arranged directly above the intake port Os formed on the bottom wall 111b of the housing 111 so that the rotation axis is substantially along the vertical direction (FIG. FIG. 2). That is, when the blower fan 115 is driven, external air is sucked in from the intake port Os, flows into the housing, and is sent upward as it is. The external air sent upward is supplied to the power supply circuit board 118 and the like through the heat sink 116 to cool those members and the like.

(9) Heat sink The heat sink 116 is a component that efficiently exchanges heat with external air, and is attached to a power supply circuit board 118 as shown in FIG.

(10) Power supply circuit board The power supply circuit board 118 is a board constituting the power supply circuit, and mounts heat-generating components, various electronic components, circuit elements, and the like. As shown in FIG. 2, the power supply circuit board 118 is housed in the lower space on the rear side of the housing 111.

(11) Automatic winding type power cord unit The automatic winding type power cord unit 120 is composed of a power cord (not shown), an automatic winding mechanism (not shown), and the like, as shown in FIG. It is housed in the space behind the housing 111. As shown in FIG. 1, a plug PL is arranged at the tip of the power cord.

(12) Open / Close Lever Mechanism The open / close lever mechanism 123 is attached to the front portion of the flange member FP of the protective frame 111d as described above. At this time, as shown in FIG. 2, the rotation shaft 123a of the opening / closing lever mechanism 123 is inserted through the bearing portion of the flange member FP of the protective frame 111d, and the opening / closing lever mechanism 123 is the rotating shaft 123a. It is configured to be rotatable up and down around the center. When the lid 140 is opened, the user rotates the opening / closing lever mechanism 123 downward with the rotation shaft 123a as the center. Then, the locked state (that is, the closed state of the lid 140) between the claw portion (not shown) of the opening / closing lever mechanism 123 and the claw portion 146b of the claw member 146 is released, and the torsion spring 150d of the hinge mechanism 150 is attached. The lid 140 is lifted upward by the force, and the lid 140 is opened. When the user closes the lid 140, the user does not need to operate the opening / closing lever mechanism 123. If the user tilts the lid 140 toward the main body 110 as it is against the urging force of the torsion spring 150d of the hinge mechanism 150, the claw portion of the opening / closing lever mechanism 123 and the claw portion 146b of the claw member 146 are locked. , The closed state of the lid 140 is maintained.

2. 2. Inner pot The inner pot 130 is a bowl-shaped pot that opens upward, and is inserted through the opening of the shoulder member 111c, the opening of the flange member FP of the protective frame 111d, and the opening of the intermediate member MP of the protective frame 111d, and FIG. As shown in the above, the protective frame 111d is accommodated with a predetermined gap via the flange member 122. The inner pot 130 can be freely removed from the protective frame 111d even after it is housed in the protective frame 111d. Here, the inner pot 130 is a multilayer body (clad material) of various aluminum alloys and stainless alloys, and can be heated by the induction heating coil 113 or the heat retaining heater 112.

3. 3. As shown in FIGS. 1 to 3, the lid 140 mainly includes an upper exterior body 141, a lower exterior body 142, a pressure adjusting mechanism 143, a substrate member 144, an inner lid 145, a claw member 146, and safety. It is composed of a mechanism 147 and a steam processing unit 148, and is rotatably attached to the main body 110 via a hinge mechanism 150. Hereinafter, each component of the lid 140 will be described in detail.

(1) Upper exterior body As shown in FIGS. 1 and 2, the upper exterior body 141 is a substantially rectangular parallelepiped member having an opening on the lower side, and covers the upper side of the substrate member 144 and the like.

(2) Lower exterior body The lower exterior body 142 is a substantially rectangular plate-like body in a plan view. As shown in FIGS. 2, 3 and 5, a substrate member 144 is arranged on the upper side of the lower exterior body 142, and an inner lid 145 is arranged on the lower side of the lower exterior body 142. A through hole (not shown) is formed at the front end portion of the lower exterior body 142, and the claw portion 146b of the claw member 146 is inserted through this through opening.

(3) Pressure Adjusting Mechanism The pressure adjusting mechanism 143 is arranged on the upper side of the central portion of the substrate member 144 as shown in FIGS. 3 and 5. The pressure adjusting mechanism 143 adjusts the pressure inside the inner pot 130 to 1.03 to 1.3 atm while the lid 140 is closed and the pressure rice cooking operation is performed. Further, the pressure adjusting mechanism 143 controls the pressure inside the main body 110 so that the lid 140 is not opened by the operation of the opening / closing lever mechanism 123 during the pressure rice cooking operation. In the present embodiment, the pressure adjusting mechanism 143 is not particularly limited, and the conventional pressure adjusting mechanism 143 may be adopted.

(4) Substrate member The substrate member 144 is a substantially rectangular plate member that supports parts / members such as a pressure adjusting mechanism 143, a safety mechanism 147, and a steam processing unit 148, and is formed of polyphenylene sulfide (PPS). ing. Further, as shown in FIGS. 3 and 4, the claw member 146 is attached to the front end portion of the substrate member 144 (more specifically, the front end portion of the central wall portion 144L described later), and the hinge is attached to the rear end portion. The mechanism 150 is attached. Further, the substrate member 144 is arranged on the upper side of the lower exterior body 142 as described above, and is attached to the lower exterior body 142 by screwing. In a plan view, the front-rear dimension and the left-right dimension of the substrate member 144 are substantially the same as the front dimension and the left-right dimension of the lower exterior body 142, respectively. Further, as shown in FIG. 3, a pressure adjusting mechanism 143 and a safety mechanism 147 are arranged on the upper side of the central portion of the substrate member 144. As shown in FIGS. 3 to 5, the substrate member 144 mainly includes a central wall portion 144L, a side edge upper wall portion 144a, a side edge lower wall portion 144b, an erection portion 144c, a step portion 144d, and a first reinforcing rib. It is formed from 144e, a second reinforcing rib 144f, a third reinforcing rib 144g, and a rear end inner side wall portion 144h. The central wall portion 144L is a wall portion having a substantially rectangular shape in a plan view, and as shown in FIGS. 3 and 4, the central portion in the left-right direction of the substrate member 144 (in other words, the side edge lower wall portion). It is formed between 144b). As shown in FIG. 4, a through port 144j and a screw receiving portion 144k are formed at the front end portion of the central wall portion 144L. Then, after the claw portion 146b of the claw member 146 is inserted into the through opening 144j, the screw is screwed into the screw receiving portion 144k and the screw receiving portion 146c of the main body portion 146a of the claw member 146. In this way, as shown in FIG. 3, the claw member 146 is attached to the front end portion of the central wall portion 144L. Further, as shown in FIGS. 3 and 4, a central wall portion 144M is formed near the center of the central wall portion 144L, and an annular recess 144N is formed on the outer side of the central wall portion 144M in the central wall portion 144L. Is formed. As shown in FIGS. 3 to 5, the side edge upper wall portion 144a is formed on the left and right side edge portions of the substrate member 144. The side edge upper wall portion 144a is arranged above the side edge lower wall portion 144b as shown in FIGS. 3 to 5. As shown in FIGS. 3 to 5, the side edge lower wall portion 144b is formed on the left and right side edge portions of the substrate member 144. As shown in FIGS. 3 to 5, the erection portion 144c is a rib extending in the vertical direction and the diagonal direction, and is between the side edge upper wall portion 144a and the side edge lower wall portion 144b and the side edge upper wall. It is erected between the portion 144a and the step portion 144d. As shown in FIGS. 3 to 5, the step portion 144d is a portion formed one step higher than the side edge lower wall portion 144b in the central portion of the side edge lower wall portion 144b. Then, as shown in FIGS. 3 to 5, in the left and right side edge portions of the substrate member 144, the truss structure TS is formed from the side edge upper wall portion 144a, the side edge lower wall portion 144b, the erection portion 144c, and the step portion 144d. It has been built. As shown in FIGS. 3 and 4, the first reinforcing rib 144e is an arcuate rib, and is formed on the upper surface of the recess 144N from the vicinity of the front end to the vicinity of the rear end. As shown in FIGS. 3 and 4, the second reinforcing rib 144f is a rib extending in the front-rear direction and the left-right direction, and is formed near the front end and the center on the upper surface of the recess 144N. As shown in FIGS. 3 and 4, the third reinforcing rib 144g is a rib extending radially from the central wall portion 144M, and is formed from the vicinity of the front end to the vicinity of the rear end on the upper surface of the recess 144N. Then, as shown in FIGS. 3 and 4, in the recess 144N, the reinforcing structure RS is constructed from the central wall portion 144L, the first reinforcing rib 144e, the second reinforcing rib 144f, and the third reinforcing rib 144g. As shown in FIGS. 4 and 5, the rear end inner side wall portion 144h is formed between the rear end inner side portion of the side edge upper wall portion 144a and the rear end inner side portion of the side edge lower wall portion 144b. Has been done. As shown in FIG. 4, a screw receiving portion 144i is formed on the rear end portion inner side wall portion 144h. Then, a screw is screwed into the screw receiving portion 144i and the screw receiving portion 150e of the movable portion 150b of the hinge mechanism 150. In this way, as shown in FIGS. 3 and 5, the movable portion 150b of the hinge mechanism 150 is fixed to the rear end portion of the substrate member 144.

Although not shown, the truss structure TS and the reinforcing structure RS extend from the fixed portion of the movable portion 150b of the hinge mechanism 150 to the vicinity of the fixed portion of the claw member 146 in the plan perspective when the lid 140 is closed. Further, although not shown, the entire area of the opening of the inner pot 130 is covered by the truss structure TS and the reinforcing structure RS in the plan perspective when the lid 140 is closed.

(5) Inner lid As shown in FIG. 2, the inner lid 145 is a member for covering and sealing the upper opening of the inner pot 130. As described above, the inner lid 145 is arranged on the lower side of the lower exterior body 142.

(6) Claw member The claw member 146 is a metal member formed of sheet metal, and is formed of a main body portion 146a and a claw portion 146b as shown in FIGS. 3 to 5. The main body portion 146a is a portion of a plate-shaped body as shown in FIGS. 3 to 5. As shown in FIG. 4, screw receiving portions 146c are formed at the left and right portions of the main body portion 146a. As described above, the screw is screwed into the screw receiving portion 146c and the screw receiving portion 144k of the central wall portion 144L of the substrate member 144. As shown in FIGS. 3 to 5, the claw portion 146b extends downward from the left and right portions on the front side of the main body portion 146a and then extends forward. As described above, the claw portion 146b is inserted into the through opening 144j of the central wall portion 144L of the substrate member 144 and the through opening of the lower exterior body 142, and is inserted into the claw portion of the opening / closing lever mechanism 123 when the lid 140 is closed. Locked.

(7) Safety mechanism The safety mechanism 147 is for releasing the pressure inside the inner pot 130 in the event of a power failure such as a power failure or disconnection of the plug, and as shown in FIG. 3, the substrate member 144 It is arranged on the upper side of the central portion and in the vicinity of the pressure adjusting mechanism 143.

(8) Steam processing unit The steam processing unit 148 traps the steam rising from the inner pot 130 during rice cooking and returns it to the inner pot 130, and is a substrate member 144 as shown in FIGS. 3 and 5. It is arranged on the upper side of the rear part.

4. Hinge mechanism As described above, the hinge mechanism 150 attaches the lid 140 to the main body 110 so that the lid 140 is rotatable with respect to the main body 110. As shown in FIGS. 2 to 5, the hinge mechanism 150 is formed of a fixed portion 150a, a movable portion 150b, a rotating shaft 150c, and a torsion spring 150d. The fixing portion 150a is a metal member formed of sheet metal, and as shown in FIG. 2, is fixed to the flange member FP of the protective frame 111d at the upper portion of the rear portion of the main body 110. Although not shown, the fixed portion 150a is formed with a bearing portion (not shown) through which the rotating shaft 150c is inserted. The movable portion 150b is a metal member formed of a sheet metal, and a bearing portion (not shown) through which the rotating shaft 150c is inserted is formed. The movable portion 150b is pivotally supported by the fixed portion 150a by the rotating shaft 150c, and is rotatable with respect to the fixed portion 150a. Further, as shown in FIG. 4, a screw receiving portion 150e is formed on the outer wall of the movable portion 150b. As described above, the movable portion 150b is fixed to the rear end portion of the board member 144 by screwing the screw into the screw receiving portion 150e and the screw receiving portion 144i of the rear end portion inner side wall portion 144h of the board member 144. Will be done. The rotating shaft 150c is inserted through the bearing portion of the fixed portion 150a and the bearing portion of the movable portion 150b, and connects the fixed portion 150a and the movable portion 150b. By doing so, the movable portion 150b becomes rotatable with respect to the fixed portion 150a (that is, the movable portion 150b becomes rotatable about the rotation shaft 150c). As shown in FIG. 4, the torsion spring 150d is attached to the rotating shaft 150c so as to surround the outer peripheral surface of the rotating shaft 150c, and urges the lid 140 toward the opening direction.

<Characteristics of the rice cooker according to the embodiment of the present invention>
(1)
In the rice cooker 100 according to the present embodiment, a truss structure TS is constructed from the side edge upper wall portion 144a, the side edge lower wall portion 144b, the erection portion 144c, and the step portion 144d at the left and right side edge portions of the substrate member 144. ing. Therefore, in the rice cooker 100, the reinforcing effect at the left and right side edges of the substrate member 144 can be increased.

(2)
In the rice cooker 100 according to the present embodiment, the substrate member 144 (including the truss structure TS and the reinforcing structure RS) is formed of polyphenylene sulfide (PPS), and no sheet metal is used. Therefore, in the rice cooker 100, not only the material cost for forming the reinforcing structure of the substrate member 144 can be reduced, but also the grounding structure for grounding can be omitted. Therefore, in this rice cooker 100, the manufacturing cost of the lid 140 can be suppressed as much as possible.

(3)
In the rice cooker 100 according to the present embodiment, the movable portion 150b is fixed to the rear end portion of the substrate member 144. Therefore, in this rice cooker 100, it is possible to prevent the substrate member 144 from coming off from the movable portion 150b due to the reinforcing effect of the truss structure TS and the reinforcing structure RS during pressure cooking in which a force is applied to the substrate member 144. .. Therefore, in this rice cooker 100, it is possible to reduce the possibility that the lid 140 can be removed from the main body 110 during pressure cooking.

(4)
In the rice cooker 100 according to the present embodiment, the truss structure TS and the reinforcing structure RS are present from the fixed portion of the movable portion 150b of the hinge mechanism 150 to the vicinity of the fixed portion of the claw member 146 in a plan view when the lid 140 is closed. It is extended. Therefore, in this rice cooker 100, the reinforcing effect of the substrate member 144 can be increased.

(5)
In the rice cooker 100 according to the present embodiment, the claw member 146 is attached to the front end portion of the central wall portion 144L of the substrate member 144. Therefore, in this rice cooker 100, it is possible to prevent the substrate member 144 from coming off from the claw member 146 due to the reinforcing effect of the truss structure TS and the reinforcing structure RS during pressure cooking in which a force is applied to the substrate member 144. .. Therefore, in this rice cooker 100, the risk of the lid 140 opening during pressure cooking can be reduced.

<Modification example>
(A)
In the rice cooker 100 according to the previous embodiment, the substrate member 144 was formed of polyphenylene sulfide (PPS). However, the substrate member 144 includes syndiotactic polystyrene (SPS), polysulfone (PSU), polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE) and It may be formed from any one of the resins selected from the group consisting of polyamideimide (PAI), polyphenyllensulfide (PPS), syndiotactic polystyrene (SPS), polysulfone (PSU), polyethersulfone (PES). , Polyetherketone (PEK), polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE) and polyamideimide (PAI) may be formed from at least two resins selected from the group.

(B)
In the rice cooker 100 according to the previous embodiment, the entire area of the opening of the inner pot 130 is covered with the truss structure TS and the reinforcing structure RS, but more than half of the area of the opening of the inner pot 130 is the truss structure TS and the reinforcing structure. It may be covered with RS. This is because even in such a case, a sufficient reinforcing effect can be obtained.

(C)
In the rice cooker 100 according to the previous embodiment, the truss structure TS and the reinforcing structure RS extend from the fixed portion of the movable portion 150b of the hinge mechanism 150 to the vicinity of the fixed portion of the claw member 146, but the truss structure TS and the reinforcing structure RS are extended. May extend from the fixed portion of the movable portion 150b of the hinge mechanism 150 to a position beyond the center of the opening of the inner pot 130. This is because even in such a case, a sufficient reinforcing effect can be obtained.

(D)
Although the present invention has been applied to the rice cooker 100 in the previous embodiment, the present invention may be applied to other cookers such as a home bakery.

The modified examples (A) to (D) may be applied individually to each example, or may be applied in combination of a plurality of examples.

100 rice cooker (pressure cooker)
110 Main body 130 Inner pot (inner container)
140 Closure 144 Board member 144a Side edge upper wall part (upper wall part)
144b Side edge lower wall part (lower wall part)
144c Elevation part 146 Claw member (locked part)
150 Hinge mechanism 150a Fixed part 150b Movable part RS Reinforcing structure (reinforcing part)
TS truss structure (reinforcement part)

Claims (6)

With the main body
An inner container housed in the main body and opened upward,
A substrate member having a reinforcing portion, a lid that is openable and closable to the main body and covers the opening of the inner container, is provided.
The reinforcing portion is made of resin, and when the lid is in the closed state, the pressure type cooker covers at least half of the area of the opening of the inner container in plan perspective. Further comprising a hinge mechanism having a fixed portion fixed to the main body and a movable portion rotatably attached to the fixed portion.
The pressure-type cooker according to claim 1, wherein the movable portion is fixed to the first end of the substrate member. The pressure cooker according to claim 2, wherein the reinforcing portion extends from the fixed portion of the movable portion to at least the center of the opening of the inner container in a plan view when the lid is in the closed state. The main body has a locking portion and has a locking portion.
Further provided with a locked portion that is locked to the locking portion when the lid is in the closed state.
The pressure-type cooker according to claim 2 or 3, wherein the locked portion is attached to a second end, which is an end opposite to the first end of the substrate member. The reinforcing portion has an upper wall portion, a lower wall portion, and an erection portion erected between the upper wall portion and the lower wall portion.
The pressure-type cooker according to any one of claims 1 to 4, wherein a truss structure is formed by the upper wall portion, the lower wall portion, and the erection portion. The reinforcing portion includes polyphenylene sulfide (PPS), syndiotactic polystyrene (SPS), polysulfone (PSU), polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), and polytetrafluoroethylene. The pressure cooker according to any one of claims 1 to 5, which is formed from at least one resin selected from the group consisting of (PTFE) and polyamide-imide (PAI).

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