JP7217502B2 - rice cooker - Google Patents

Description

The present invention relates to a rice cooker.

In a rice cooker, there has been proposed a configuration for rotatably supporting a lid on a housing. For example, in a rice cooker disclosed in Patent Document 1, an outer cover is rotatably supported by a main body case about a support shaft. The support shaft is fixed to the main body case via the bearing side plate. The braking rotator is rotatably supported by the spindle and connected to the outer lid. As the braking rotator rotates about the support shaft, the outer cover connected to the braking rotator also rotates about the support shaft. Both ends of a kick spring wound around a support shaft are connected to the body case and the outer cover, respectively. The kick spring applies an urging force to the outer lid in a direction from the closed state to the open state. When the lock mechanism is released by pushing the operation button while the outer lid is in the closed state, the outer lid rotates according to the biasing force of the kick spring and switches from the closed state to the open state.

JP-A-2000-23835

As an example of a method of attaching a lid to a housing in a rice cooker, in a state in which the lid is assembled to the housing, a support shaft is passed through a through hole provided in each of the housing and the lid to make them rotatable. There is a way to concatenate. In this method, it is necessary to cover the through-hole of the cover with a cover that covers the spindle in order to avoid exposing both sides of the spindle in the axial direction. In this case, a seam is formed between the lid body and the cover, which is not preferable from the viewpoint of the appearance of the rice cooker.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rice cooker in which a lid can be easily attached to a housing while maintaining aesthetic appearance.

A rice cooker according to claim 1 comprises a housing having a housing portion for housing an inner pot, a lid capable of opening and closing the housing portion of the housing, and a lid capable of opening and closing the lid with respect to the housing. A rice cooker comprising a hinge portion supported by a shaft body, a first plate portion rotatably supported by the shaft body and fixed to the lid body, and the shaft body and a torsion coil spring wound around the shaft, wherein one end of the first plate faces the lid. the torsion coil spring, the other end of which is locked to the surface of the second plate portion opposite to the surface facing the housing; The body includes a cover cover covering both ends of the shaft from both sides in the axial direction, a shaft supporting part rotatably supporting both ends of the shaft inside the cover cover, and the second a first fixing portion for fixing one plate portion; the housing is provided on one side in an orthogonal direction extending horizontally perpendicular to the axial direction; and a receiving portion for receiving the shaft; a second fixing portion for fixing the plate portion; the receiving portion has at least a first concave portion recessed toward the other side in the orthogonal direction; and the first plate portion projects from the lid. and a first locking portion having a first hook-shaped portion at its tip; and a first through hole formed at a position facing the first hook-shaped portion. One end of the torsion coil spring, which has a first projecting portion inserted through one through-hole and is locked by the first locking portion, is sandwiched between the first hook-shaped portion and the first projecting portion. characterized by being

A rice cooker according to claim 2 includes a housing having a housing portion in which an inner pot is housed, a lid capable of opening and closing the housing portion of the housing, and a lid capable of opening and closing the lid with respect to the housing. A rice cooker comprising a hinge portion supported by a shaft body, a first plate portion rotatably supported by the shaft body and fixed to the lid body, and the shaft body and a torsion coil spring wound around the shaft, wherein one end of the first plate faces the lid. the torsion coil spring, the other end of which is locked to the surface of the second plate portion opposite to the surface facing the housing; The body includes a cover cover covering both ends of the shaft from both sides in the axial direction, a shaft supporting part rotatably supporting both ends of the shaft inside the cover cover, and the second a first fixing portion for fixing one plate portion; the housing is provided on one side in an orthogonal direction extending horizontally perpendicular to the axial direction; and a receiving portion for receiving the shaft; a second fixing portion for fixing the plate portion, wherein the receiving portion has at least a first concave portion recessed toward the other side in the orthogonal direction, and the second plate portion protrudes from the housing. and a second locking portion having a second hook-shaped portion at its distal end; and a second through hole formed at a position facing the second hook-shaped portion. The other end of the torsion coil spring, which has a second projecting portion inserted through the two through-holes and is locked by the second locking portion, is positioned between the second hook-shaped portion and the second projecting portion. It is characterized by being sandwiched.

A rice cooker according to claim 3 , in addition to the configuration of the invention according to claim 1 or 2 , is provided with a rotary damper provided with a first gear having a first tooth on the first plate portion, and the housing is , a second gear having a second tooth meshing with the first tooth, wherein the first tooth and the second tooth mesh with each other during the process of attaching the lid to the housing.

In the rice cooker according to claim 4 , in addition to the configuration of the invention according to claim 3 , it is preferable that the second gear is integrally molded with the receiving portion.

In the rice cooker according to claim 5 , in addition to the configuration of the invention according to claim 3 or 4 , the center of the arc extending along the second tooth may pass through the center of the shaft.

A rice cooker according to claim 6 , in addition to the configuration of the invention according to any one of claims 1 to 5 , wherein the receiving part is provided in the first recess and the bottom part of the first recess, and a recessed second recess.

A rice cooker according to claim 7 , in addition to the configuration of the invention according to any one of claims 1 to 6 , preferably further includes a housing cover provided on the housing and covering the shaft from the radial direction. .

According to the rice cooker of claim 1, the accommodating portion of the housing can be opened and closed by the lid by rotating the lid about the shaft. In the rice cooker, the lid can be attached to the housing by inserting the shaft of the hinge into the first recess of the receiving portion while the hinge is fixed to the lid. Therefore, both ends of the shaft can be previously covered with the lid covering portion, so that the rice cooker can attach the lid to the housing while maintaining the aesthetic appearance.

Moreover , the one end of the torsion coil spring can be prevented from being detached from the first plate portion by holding the one end between the first hook-shaped portion and the first projecting portion.

According to the rice cooker of claim 2 , the accommodating portion of the housing can be opened and closed by the lid by rotating the lid about the shaft. In the rice cooker, the lid can be attached to the housing by inserting the shaft of the hinge into the first recess of the receiving portion while the hinge is fixed to the lid. Therefore, both ends of the shaft can be previously covered with the lid covering portion, so that the rice cooker can attach the lid to the housing while maintaining the aesthetic appearance. In addition, the second hook-shaped portion and the second protruding portion are arranged so that the other end portion of the torsion coil spring locked to the second locking portion of the second plate portion is detached from the second plate portion. can be suppressed by sandwiching the other end.

According to the rice cooker according to claim 3 , in addition to the effect of the invention according to claim 1 or 2 , the rotary damper can reduce the impact when the lid is opened by the biasing force of the torsion coil spring.

According to the rice cooker according to claim 4 , in addition to the effects of the invention according to claim 3 , it is possible to easily realize a configuration in which the housing is provided with the second gear. Also, the strength of the second gear can be maintained.

According to the rice cooker according to claim 5 , in addition to the effect of the invention according to claim 3 or 4 , the rice cooker can move the first gear of the first gear over the entire movement range when the lid is opened and closed. The tooth can be meshed with the second tooth of the second gear. Therefore, the rice cooker can reduce the impact when the lid is opened over the entire moving range of the lid.

According to the rice cooker according to claim 6 , in addition to the effect of the invention according to any one of claims 1 to 5 , the lid moves the shaft along the first recess to the other side in the orthogonal direction. Then, it is attached to the housing by moving downward along the second recess. In this case, it is possible to reduce the possibility that the lid will come off from the receiving portion.

According to the rice cooker of the invention according to claim 7 , in addition to the effect of the invention according to any one of claims 1 to 6 , the rice cooker covers the shaft from the axial direction with the cover covering part, The shaft can be radially covered by the body covering portion. Therefore, the aesthetic appearance of the rice cooker can be maintained even better.

The inventions of claims 1 to 7 described above can be combined arbitrarily. For example, the configuration of at least one of claims 3 to 7 may be provided without all or part of claim 1 or 2 . However, in particular, it is preferable to have the configurations of claims 1 and 2 and at least any one configuration and combination of claims 3 to 7 . Also, arbitrary components of claims 1 to 7 may be extracted and combined. The applicant of the present application intends to obtain patent rights for such configurations as well.

Fig. 3 is a perspective view of the gas rice cooker 1 with the lid 50 in the closed position. Fig. 3 is a perspective view of the gas rice cooker 1 with the lid 50 in the open position. 2 is a rear view of gas rice cooker 1. FIG. 2 is a perspective view of a housing 20; FIG. 4 is a perspective view of a lid body 50 and a hinge portion 70; FIG. 4 is a perspective view of a hinge portion 70; FIG. Fig. 3 is a perspective view of the gas rice cooker 1 with the upper surface portion 50S and the cover 22C removed; FIG. 4 is a cross-sectional view taken along the line II of FIG. 3 as viewed in the direction of the arrow;

Embodiments of the present invention will be described below. The device structures, flow charts, etc. described below are merely illustrative examples and not intended to be limiting unless specifically stated otherwise. The drawings are used to explain technical features that can be employed by the present invention. In the following description, left and right, front and rear, and top and bottom indicated by arrows in the drawings are used.

<Overview of gas rice cooker 1>
As shown in FIGS. 1 to 4, the gas rice cooker 1 includes a housing 20, a lid body 50, and a hinge portion 70 (see FIG. 5). The housing 20 accommodates the inner hook 2K (see FIG. 2) inside. The lid 50 can open and close the opening at the upper end of the housing 20 . The inner pot 2K can be taken out from the gas rice cooker 1 by opening the lid 50. - 特許庁The hinge part 70 supports the lid body 50 so as to be openable and closable with respect to the housing 20 .

<Case 20>
The housing 20 has a substantially cylindrical shape and extends vertically. The upper end of the housing 20 is open and the lower end is closed. The housing 20 has a front projecting portion 21, a rear projecting portion 22, a right curved portion 23R, a left curved portion 23L (see FIGS. 2 and 3), a bottom surface 24, and a hinge holding portion 2H (see FIG. 4). The right curved portion 23R extends along an arc that curves convexly to the right. As shown in FIGS. 2 and 3, the left curved portion 23L extends along an arc that curves convexly to the left. The right bending portion 23R and the left bending portion 23L are collectively referred to as the bending portion 23. As shown in FIG. The bottom surface 24 connects to the lower ends of the front protruding portion 21 , the rear protruding portion 22 , and the curved portion 23 .

A handle 11 is provided near the upper end of the curved portion 23 . The handle 11 has a bar shape and is curved in a substantially U shape. Both ends of the handle 11 are rotatably supported by the curved portion 23 . As shown in FIG. 4, a portion surrounded by the front protruding portion 21, the rear protruding portion 22, and the curved portion 23 is called a housing portion 20K. As shown in FIG. 2, the inner hook 2K is accommodated in the accommodating portion 20K. A burner (not shown) is held below the inner hook 2K in the housing portion 20K. A gas connection port 12 to which a gas hose is connected is provided at the lower end of the right curved portion 23R.

The front protruding portion 21 protrudes forward from the front end portion of the curved portion 23 . A portion of the front projecting portion 21 extending forward from the front end portion of the right curved portion 23R is referred to as a right wall 21R. A portion of the front projecting portion 21 extending forward from the front end portion of the left curved portion 23L is referred to as a left wall 21L. A portion of the front projecting portion 21 that extends between the front ends of the right wall 21R and the left wall 21L is called a front wall 21F. A display unit 6 for displaying information is provided at the lower end of the front wall 21F. A portion of the front projecting portion 21 that extends between the upper ends of the right wall 21R and the left wall 21L is called an upper wall 21S (see FIGS. 2 and 4). As shown in FIG. 2, a lock mechanism 210 is provided in the center of the upper wall 21S in the left-right direction to keep the lid 50 closed.

The rear protruding portion 22 protrudes rearward from the rear end portion of the curved portion 23 . As shown in FIGS. 3 and 4, the portion of the rear projecting portion 22 that extends rearward from the rear end portion of the right curved portion 23R is called a right wall 22R. A portion of the rear projecting portion 22 that extends rearward from the rear end portion of the left curved portion 23L is referred to as a left wall 22L. A portion of the rear projecting portion 22 that extends between the respective rear end portions of the right wall 22R and the left wall 22L is called a rear wall 22B. A portion of the rear projecting portion 22 that extends between the upper ends of the right wall 22R and the left wall 22L is called an upper wall 22S (see FIG. 4).

As shown in FIG. 4, a recess 220 recessed forward is provided at the upper end of the rear wall 22B. The recess 220 is covered from behind with a cover 22C shown in FIG. As shown in FIG. 4, the bottom surface 22D of the recess 220 is perpendicular to the front-rear direction. The cover 22C is detachable with respect to the housing 20. As shown in FIG. As shown in FIG. 3, the cover 22C is provided with a rearwardly protruding handle base 11T. The handle base 11T receives the rotatable handle 11 from below.

As shown in FIG. 4, the hinge holding portion 2H is a portion for holding a later-described hinge portion 70 (see FIGS. 5 and 6) on the housing 20 side. The hinge holding portion 2H has a second fixing portion 25, receiving portions 26R and 26L (collectively referred to as receiving portions 26), and a housing covering portion 27. As shown in FIG. The second fixing portion 25 is provided on the bottom surface 22</b>D of the concave portion 220 . The receiving portion 26 and the housing covering portion 27 are provided on the upper wall 22S.

The second fixing portion 25 is provided at the rear end portion of the housing 20, and fixes a second plate portion 72 (see FIGS. 5 and 6) of the hinge portion 70, which will be described later. The second fixing portion 25 has second projecting portions 25R and 25L. Each of the second protrusions 25R and 25L has a bent plate shape and protrudes rearward from the bottom surface 22D of the recess 220 . The second protrusions 25R and 25L are arranged apart from each other in the left-right direction. The second projecting portion 25R is arranged on the right side with respect to the second projecting portion 25L. The shapes of the second protrusions 25R and 25L are symmetrical. The second projecting portion 25L has extending portions 251 and 252 that are aligned in the vertical direction and extend in the left-right direction, and one extending portion 253 that extends between the right ends of the two extending portions. The same reference numerals (extensions 251, 252, 253) as those of the second protrusion 25L are given to the components corresponding to the extensions 251, 252, 253 of the second protrusion 25L in the second protrusion 25R. . The second projecting portions 25R and 25L are collectively referred to as the second projecting portion 25A.

The receiving portion 26 is provided at the rear end portion of the housing 20 and receives a shaft body 73 of the hinge portion 70 to be described later. The receiving portion 26R is provided on the right side of the recess 220 in the upper wall 22S of the rear projecting portion 22. As shown in FIG. The receiving portion 26L is provided on the left side of the recess 220 in the upper wall 22S of the rear projecting portion 22. As shown in FIG. The shape of the receiving portions 26R and 26L is symmetrical. The receiving portion 26L has a projecting portion 261, an extending portion 262, and a second gear 266. As shown in FIG. The protrusion 261 protrudes upward from the upper wall 22S. The extending portion 262 extends rearward from the rear end portion of the projecting portion 261 . The extending portion 262 has a plate shape and is perpendicular to the left-right direction. A first concave portion 264 and a second concave portion 265 are formed in the extension portion 262 . The first recessed portion 264 is provided at the rear end portion of the extending portion 262 and is recessed forward. The second recess 265 is provided at the bottom of the first recess 264 and is recessed downward.

The second gear 266 is part of the spur gear and is integrally molded with the receiving portion 26L. The second gear 266 is provided on the left surface of the extending portion 262 above the first concave portion 264 . The second gear 266 has a second tooth 26A. The second tooth 26A is arranged along an arc that curves upward in a convex shape. The center of the arc extending along the second tooth 26A is called the center C2. The center C2 is arranged within the second recess 265 .

In the receiving portion 26R, the components corresponding to the projecting portion 261, the extending portion 262, the first recessed portion 264, the second recessed portion 265, and the second gear 266 of the receiving portion 26L are denoted by the same reference numerals as the receiving portion 26L (projecting portion 261, extension 262, first recess 264, second recess 265, second gear 266, second tooth 26A).

The housing covering portion 27 is provided at the rear end portion of the housing 20 and covers the shaft body 73 of the hinge portion 70 which will be described later. The housing covering portion 27 has a curved plate shape and is provided between the projecting portions 261 of the receiving portions 26R and 26L. The housing cover 27 is arranged along an arc that curves forward in a convex shape. The center of the arc extending along the housing cover 27 substantially coincides with the center C2 of the arc extending along the second tooth 26A.

<Lid 50>
As shown in FIGS. 1 and 2, the lid body 50 has a substantially columnar shape. The lid body 50 can open and close the housing portion 20K of the housing 20 . The lid 50 is movable between a closed position shown in FIG. 1 and an open position shown in FIG. As shown in FIG. 1 , the lid body 50 arranged at the closed position closes the accommodating portion 20K of the housing 20 . As shown in FIG. 2 , the lid body 50 arranged at the open position opens the housing portion 20K of the housing 20 . Hereinafter, on the premise that the lid 50 is placed in the closed position (see FIG. 1), the direction of the gas rice cooker 1 is applied to the lid 50 as well.

The lid body 50 has a base portion 50G (see FIG. 2), a right side portion 50R, a left side portion 50L, an upper surface portion 50S, and a hinge holding portion 5H (see FIG. 5). As shown in FIG. 5, the base 50G has a circular plate shape. The right side portion 50R and the left side portion 50L each have a substantially rectangular plate shape elongated in the front-rear direction. A portion of the right side surface portion 50R excluding the front and rear end portions extends along the right side surface of the base portion 50G. A portion of the left side surface portion 50L excluding the front and rear end portions extends along the left side surface of the base portion 50G. A front end portion of each of the right side portion 50R and the left side portion 50L protrudes forward from the base portion 50G. A rear end portion of each of the right side portion 50R and the left side portion 50L protrudes rearward from the base portion 50G. As shown in FIG. 1, the upper surface portion 50S spans between the respective upper end portions, front end portions, and rear end portions of the right side portion 50R and the left side portion 50L. The upper surface portion 50S covers the base portion 50G from above, front, and rear.

As shown in FIGS. 1 and 2, front end portions of the right side portion 50R, the left side portion 50L, and the upper surface portion 50S each form a front protruding portion 51 that protrudes forward with respect to the base portion 50G. A lock mechanism 510 is provided at the front end of the front projecting portion 51 to maintain the lid 50 at the closed position. The lock mechanism 510 prevents the lid body 50 from moving from the closed position to the open position while being engaged with the lock mechanism 210 (see FIG. 2) of the housing 20 . Rear end portions of the right side portion 50R, the left side portion 50L, and the upper surface portion 50S form a rear protrusion portion 52 that protrudes rearward with respect to the base portion 50G.

A hinge holding portion 5H (see FIG. 5) is arranged inside the rear projecting portion 52 and at the rear end portion of the base portion 50G. The hinge holding portion 5H is a portion for holding a later-described hinge portion 70 (see FIG. 5) on the lid body 50 side. As shown in FIG. 5, the hinge holding portion 5H includes a first fixing portion 55, lid body covering portions 56R and 56L (collectively referred to as the lid body covering portion 56), shaft support portions 57R and 57L (collectively , referred to as a shaft support portion 57). The first fixing portion 55 is provided on a portion of the upper surface of the base portion 50G. The lid covering portion 56 is provided on the right side portion 50R and the left side portion 50L. The shaft support portion 57 is provided on the lid cover portion 56 .

The first fixing portion 55 is provided near the rear end portion of the upper surface of the base portion 50G, and fixes the first plate portion 71 of the hinge portion 70, which will be described later. The first fixing portion 55 has first projecting portions 55R and 55L. The first protrusions 55R and 55L each have a bent plate shape and protrude upward from the upper surface of the base 50G. The first projecting portions 55R and 55L are arranged apart from each other in the left-right direction. The first projecting portion 55R is arranged on the right side with respect to the first projecting portion 55L. The shapes of the first protrusions 55R and 55L are symmetrical. The first protruding portion 55L has extending portions 551 and 552 that are aligned in the front-rear direction and extend in the left-right direction, and one extending portion 553 that extends between the left ends of the two extending portions. In the first projecting portion 55R, the components corresponding to the extending portions 551, 552, and 553 of the first projecting portion 55L are denoted by the same reference numerals (extending portions 551, 552, and 553) as those of the first projecting portion 55L. . The first projecting portions 55R and 55L are collectively referred to as the first projecting portion 55A.

The lid covering portion 56 corresponds to the rear end portion of each of the right side portion 50R and the left side portion 50L forming the rear projecting portion 52, and covers the shaft 73 of the hinge portion 70, which will be described later, from both left and right sides. A rear end portion of the right side surface portion 50R corresponds to the lid cover portion 56R. A rear end portion of the left side surface portion 50L corresponds to the lid covering portion 56L. The lid covering portions 56R and 56L are substantially perpendicular to the left-right direction and protrude rearward with respect to the base portion 50G.

The shaft support portion 57 is provided inside the lid covering portion 56 and supports a shaft body 73 of the hinge portion 70 to be described later. The shaft support portion 57R is provided on the left surface of the lid covering portion 56R and has a recess recessed rightward. The shaft support portion 57L is provided on the right surface of the lid covering portion 56L and has a concave portion recessed leftward.

<Hinge portion 70>
As shown in FIG. 5, the hinge portion 70 supports the lid body 50 so as to be openable and closable with respect to the housing 20 (see FIGS. 1 and 2). As shown in FIG. 6, the hinge portion 70 has a first plate portion 71, a second plate portion 72, a shaft 73, and torsion coil springs 74R and 74L (generically referred to as torsion coil springs 74). The shaft 73 has a columnar shape and extends in the left-right direction. The first plate portion 71 and the second plate portion 72 are rotatably supported by the shaft 73 . The torsion coil spring 74 is wound around the shaft 73 .

The first plate portion 71 has a bent plate shape and is fixed to the first fixing portion 55 of the lid 50 . The first plate portion 71 has plate-like first portions 711R and 711L, second portions 712R and 712L, and a bridging portion 710, respectively. The first parts 711R and 711L are perpendicular to the vertical direction. The first parts 711R and 711L are arranged apart from each other in the horizontal direction. The first portion 711R is arranged on the right side with respect to the first portion 711L. The shapes of the first parts 711R and 711L are symmetrical. A bridging portion 710 is bridging between the first portions 711R and 711L. The bridging portion 710 extends in the left-right direction.

A first through hole 762R is formed on the right side of the connecting portion with the bridging portion 710 in the first portion 711R. The shape of the first through hole 762R is square. The first locking portion 761R has a hook shape made of a bent plate. The first locking portion 761R extends upward from the right end of the four sides of the first through hole 762R, bends leftward, and extends further. Hereinafter, the portion of the first locking portion 761R that is closer to the distal end than the bent portion is referred to as the first distal hooked portion 76A. The first hook-shaped portion 76A vertically faces the first through hole 762R. A portion of the first locking portion 761R that is closer to the proximal end than the bent portion is referred to as a first proximal hooked portion 76B.

The first engaging portion 761L and the first through hole 762L of the first portion 711L respectively correspond to the first engaging portion 761R and the first through hole 762R of the first portion 711R. The first locking portions 761R and 761L are collectively referred to as the first locking portion 761. As shown in FIG. The first through holes 762R and 762L are collectively referred to as the first through holes 762. As shown in FIG. In the first locking portion 761L, the components corresponding to the first distal hooked portion 76A and the first proximal hooked portion 76B of the first locking portion 761R are denoted by the same reference numerals as those of the first locking portion 761R. (First distal hooked portion 76A, first proximal hooked portion 76B) are attached.

The second portion 712R extends downward from the rear end portion of the first portion 711R. The second portion 712L extends downward from the rear end portion of the first portion 711L. The second parts 712R and 712L are orthogonal to the left-right direction. The shaft 73 is inserted through through-holes provided at the rear end portions of the second portions 712R and 712L. The second parts 712R and 712L are rotatable with respect to the shaft 73. As shown in FIG. Therefore, the first plate portion 71 is rotatably supported with respect to the shaft 73 . A right end portion of the shaft 73 protrudes to the right from the second portion 712R. A left end portion of the shaft 73 protrudes leftward from the second portion 712L.

A rotary damper 78R is provided on the left surface of the second portion 712R. The rotary damper 78R has a first gear 781. The first gear 781 is a spur gear and is rotatable about an axis extending in the left-right direction. A brake (not shown) is provided on the rotating shaft of the first gear 781 . Rotation of the first gear 781 is restrained by a brake. The first gear 781 has a first tooth 78A. A rotary damper 78L is provided on the right surface of the second portion 712L. The rotary damper 78L has the same configuration as the rotary damper 78R. Components of the rotary damper 78L corresponding to the first gear 781 and the first tooth 78A of the rotary damper 78R are denoted by the same reference numerals as the rotary damper 78R (first gear 781, first tooth 78A). The rotary dampers 78R and 78L are collectively referred to as a rotary damper 78.

The second plate portion 72 is fixed to the second fixing portion 25 (see FIG. 4) of the housing 20 . The second plate portion 72 has a plate shape and is perpendicular to the front-rear direction. The second plate portion 72 has a symmetrical shape centered on an axis of symmetry extending vertically from the center in the left-right direction. The shaft 73 is inserted through the through-holes respectively provided at the upper left end and the upper right end of the second plate portion 72 . The second plate portion 72 is rotatably supported with respect to the shaft 73 .

A second engaging portion 771R and a second through hole 772R are formed on the right side of the center of the second plate portion 72 in the left-right direction. The shape of the second through hole 772R is square. The second locking portion 771R has a hook shape made of a bent plate. The second locking portion 771R extends upward from the left end of the four sides of the second through hole 772R, bends rightward into a hook shape, and further extends. Hereinafter, the portion of the second locking portion 771R that is closer to the distal end than the bent portion will be referred to as the second distal hooked portion 77A. The second hook-shaped portion 77A faces the second through hole 772R in the front-rear direction. A portion of the second locking portion 771R that is closer to the proximal end than the bent portion is referred to as a second proximal hooked portion 77B.

A second engaging portion 771L and a second through hole 772L are formed on the left side of the center of the second plate portion 72 in the left-right direction. The second locking portion 771L and the second through hole 772L correspond to the second locking portion 771R and the second through hole 772R, respectively. The second locking portions 771R and 771L are collectively referred to as a second locking portion 771. As shown in FIG. The second through holes 772R and 772L are collectively referred to as the second through holes 772. As shown in FIG. In the second locking portion 771L, the components corresponding to the second distal hooked portion 77A and the second proximal hooked portion 77B of the second locking portion 771R are denoted by the same reference numerals as those of the second locking portion 771R. (Second distal hooked portion 77A, second proximal hooked portion 77B) are attached.

The torsion coil spring 74</b>R is wound around a portion of the shaft 73 that is to the right of the center of the second plate portion 72 in the horizontal direction and to the left of the upper right end of the second plate portion 72 . The torsion coil spring 74</b>L is wound around a portion of the shaft 73 on the left side of the center of the second plate portion 72 in the horizontal direction and on the right side of the upper left end portion of the second plate portion 72 . One end portion 741R of the torsion coil spring 74R is arranged below the first hooked end portion 76A of the first locking portion 761R. One end 741L of the torsion coil spring 74L is arranged below the first hooked end portion 76A of the first locking portion 761L. Thereby, one end portions 741R and 741L of the torsion coil springs 74R and 74L are locked to the first plate portion 71 by the first locking portions 761R and 761L, respectively. The one end portions 741R and 741L are collectively referred to as the one end portion 741. As shown in FIG.

The other end portion 742R of the torsion coil spring 74R is arranged on the front side with respect to the second hooked end portion 77A of the second locking portion 771R. The other end portion 742L of the torsion coil spring 74L is arranged on the front side with respect to the second hooked end portion 77A of the second locking portion 771L. Thereby, the other end portions 742R and 742L of the torsion coil spring 74R are locked to the second plate portion 72 by the second locking portions 771R and 771L. The other end portions 742R and 742L are collectively referred to as the other end portion 742. As shown in FIG.

The one end portion 741 and the other end portion 742 of the torsion coil spring 74 are arranged along substantially the same plane in a state where no external force is applied. Therefore, the first plate portion 71 to which the one end portion 741 is locked and the second plate portion 72 to which the other end portion 742 is locked are also arranged substantially on the same plane in a state where no external force is applied. be done. On the other hand, as shown in FIGS. 5 and 6, for example, when a force acts in a direction to rotate the first plate portion 71 and the second plate portion 72 about the shaft body 73, the torsion coil spring 74 moves the first plate portion 71 and the second plate portion 72. The portion 71 and the second plate portion 72 are biased toward their original positions. The torsion coil spring 74 applies an urging force to the lid 50 in the direction from the closed position to the open position with respect to the housing 20 .

<Assembly>
A procedure for assembling the housing 20, the lid body 50, and the hinge portion 70 will be described. First, the hinge portion 70 is attached to the lid body 50 from which the upper surface portion 50S is removed. As shown in FIG. 5 , the first plate portion 71 of the hinge portion 70 is arranged along the vicinity of the rear end portion of the base portion 50</b>G of the lid body 50 while the hinge portion 70 is attached to the lid body 50 . The first locking portion 761 of the first plate portion 71 extends in a direction protruding from the upper surface of the base portion 50</b>G of the lid 50 . One end portion 741 of the torsion coil spring 74 is locked by a first locking portion 761 on the upper surface side of the first plate portion 71 opposite to the lower surface facing the base portion 50</b>G of the lid 50 .

The first protruding portion 55A of the lid 50 is inserted from below into the first through hole 762 (see FIG. 6) of the first plate portion 71 of the hinge portion 70 and protrudes upward. One end portion 741 of the torsion coil spring 74 is sandwiched between the first proximal hook-shaped portion 76B (see FIG. 6) of the first locking portion 761 and the extended portion 553 of the first projecting portion 55A in the left-right direction. be done. Detachment of the one end portion 741 of the torsion coil spring 74 from the first locking portion 761 is suppressed by the first projecting portion 55A. Thereby, the first plate portion 71 is fixed to the lid body 50 by the first fixing portion 55 (the first projecting portion 55A).

The lid covering portion 56 of the lid 50 is a portion of the shaft 73 of the hinge portion 70 that protrudes outward beyond the second portions 712R and 712L (see FIG. 6) of the first plate portion 71, that is, the shaft 73. are arranged on the outside with respect to the left and right ends of the The lid covering portion 56 covers the left and right ends of the shaft 73 from both the left and right sides. The left and right ends of the shaft 73 of the hinge portion 70 are fitted to the shaft support portions 57 provided inside the lid covering portion 56 of the lid 50 . The shaft support portion 57 rotatably supports the shaft 73 inside the lid covering portion 56 .

Next, the hinge portion 70 attached to the lid 50 is attached to the housing 20 in the following procedure. The hinge part 70 attached to the lid 50 is brought horizontally closer to the housing 20 with the cover 22C removed from the rear. The left and right ends of the shaft 73 of the hinge portion 70 enter the first recess 264 (see FIG. 4) of the receiving portion 26 of the housing 20 and move forward along the first recess 264 . At this time, the second projecting portion 25A of the housing 20 does not pass through the second through hole 772 of the second plate portion 72 of the hinge portion 70 . The reason is that the second projecting portion 25A is arranged at a position slightly shifted downward with respect to the second through hole 772 during the movement.

After the left and right ends of the shaft body 73 reach the bottom of the first concave portion 264, the hinge portion 70 is moved downward. The shaft 73 of the hinge portion 70 moves downward along the second recess 265 (see FIG. 4). When the left and right ends of the shaft 73 reach the bottom of the second recess 265, the receiving portion 26 receives the shaft 73 from below. At this time, the vertical positions of the second projecting portion 25A of the housing 20 and the second through hole 772 of the second plate portion 72 of the hinge portion 70 match. Therefore, the second protruding portion 25A is inserted through the second through hole 772 from the front side and protrudes rearward. Therefore, the operator can confirm that the second protruding portion 25A is inserted into the second through hole 772 while the shaft 73 of the hinge portion 70 is moving downward along the second concave portion 265, thereby allowing the housing to be opened. It is possible to reduce the possibility that the hinge part 70 is attached to the body 20 in an incorrect state.

As shown in FIG. 8, the position of the center C1 of the shaft body 73 received by the receiving portion 26 (see FIG. 4) and the second tooth 26A of the second gear 266 provided on the receiving portion 26 (see FIG. 4) reference) coincides with the position of the center C2 of the arc extending along. The housing covering portion 27 of the housing 20 covers the front of the shaft 73 received by the receiving portion 26 . The direction in which the shaft body 73 is covered by the housing covering portion 27 corresponds to the substantially front half portion of the shaft body 73 in the radial direction.

As shown in FIG. 7, the first gear 781 of the rotary damper 78 of the hinge portion 70 is provided on the receiving portion 26 of the housing 20 in the process of moving the hinge portion 70 relative to the housing 20 as described above. The second gear 266 is approached from behind. More specifically, while the shaft 73 of the hinge portion 70 moves forward along the first recess 264 of the receiving portion 26 of the housing 20, the first teeth 78A of the first gear 781 (see FIG. 6) , the second tooth 26A (see FIG. 4) of the second gear 266 is slightly separated. On the other hand, while the shaft 73 of the hinge portion 70 moves downward along the second concave portion 265, the first tooth 78A (see FIG. 6) of the first gear 781 moves the second tooth 26A of the second gear 266 (see FIG. 6). (See FIG. 4). Note that if the shaft 73 of the hinge portion 70 moves downward along the second recess 265 while the first tooth 78A and the second tooth 26A are in an incorrect positional relationship, the first tooth 78A It does not mesh with the second tooth 26A. For this reason, the operator confirms that the first teeth 78A mesh with the second teeth 26A while the shaft 73 of the hinge portion 70 moves downward along the second recesses 265, thereby allowing the housing 20 to move. It is possible to reduce the possibility that the hinge part 70 is attached in an erroneous state.

With the hinge portion 70 attached to the housing 20 , the second plate portion 72 of the hinge portion 70 is arranged along the bottom surface 22</b>D (see FIG. 4 ) of the recess 220 of the housing 20 . The second locking portion 771 of the second plate portion 72 extends in a direction protruding from the bottom surface 22</b>D of the housing 20 . The other end portion 742 of the torsion coil spring 74 is locked by a second locking portion 771 on the rear surface side of the second plate portion 72 , which is the surface opposite to the front surface facing the bottom surface 22</b>D of the housing 20 .

The second protruding portion 25A of the housing 20 is inserted from the front side into the second through hole 772 of the second plate portion 72 of the hinge portion 70 and protrudes rearward. The other end portion 742 of the torsion coil spring 74 is sandwiched between the second proximal hook-shaped portion 77B of the second locking portion 771 and the extending portion 253 of the second projecting portion 25A in the left-right direction. Separation of the other end portion 742 of the torsion coil spring 74 from the second locking portion 771 is suppressed by the second projecting portion 25A. Thereby, the second plate portion 72 is fixed to the housing 20 by the second fixing portion 25 (second projecting portion 25A).

Next, the upper surface portion 50S (see FIG. 3) is attached to the lid body 50, and the cover 22C (see FIG. 3) is attached to the housing 20. As shown in FIG. The hinge portion 70 is covered with the upper surface portion 50S and the cover 22C. As described above, the assembly of the housing 20, the lid body 50, and the hinge portion 70 is completed.

<Actions and effects of the present embodiment>
The gas rice cooker 1 can open and close the housing portion 20</b>K of the housing 20 with the lid 50 by rotating the lid 50 around the shaft 73 . In the gas rice cooker 1 , the lid 50 is attached to the housing 20 by inserting the shaft 73 of the hinge 70 into the first concave portion 264 of the receiving portion 26 while the hinge 70 is fixed to the lid 50 . can be installed. Therefore, since the lid 50 can be attached to the housing 20 in a state in which both ends of the shaft 73 are covered in advance by the lid covering portion 56, it is not necessary to add a member to cover both ends of the shaft 73 later. do not have. Therefore, in the gas rice cooker 1, the lid covering portion 56 can be integrally formed with the right side portion 50R and the left side portion 50L of the lid 50, so that the lid 50 can be attached to the housing 20 while maintaining the aesthetic appearance. can be done.

The torsion coil spring 74 urges the lid body 50 from the closed position toward the open position. The user can switch the lid 50 to the open position using the biasing force of the torsion coil spring 74 by operating the lock mechanism 510 with the lid 50 arranged at the closed position. One end portion 741 of the torsion coil spring 74 is engaged with the surface of the first plate portion 71 of the hinge portion 70 opposite to the surface facing the base portion 50G of the lid body 50 . The other end portion 742 of the torsion coil spring 74 is engaged with the surface of the second plate portion 72 of the hinge portion 70 opposite to the surface facing the bottom surface 22</b>D of the housing 20 . In this case, in the process of assembling the gas rice cooker 1 , the torsion coil spring 74 can be easily locked to each of the first plate portion 71 facing the lid 50 and the second plate portion 72 facing the housing 20 .

The gas rice cooker 1 is configured such that the one end portion 741 of the torsion coil spring 74 that is locked by the first locking portion 761 of the first plate portion 71 is detached from the first plate portion 71 with a first base end hook-like shape. This can be suppressed by sandwiching the one end portion 741 from both the left and right sides with the portion 76B and the first projecting portion 55A. The gas rice cooker 1 is configured such that the other end portion 742 of the torsion coil spring 74 locked to the second locking portion 771 of the second plate portion 72 is separated from the second plate portion 72 by the second base end hook. This can be suppressed by sandwiching the other end portion 742 from both the left and right sides with the shaped portion 77B and the second projecting portion 25A.

The first plate portion 71 is provided with a rotary damper 78 having a first gear 781 having first teeth 78A. The housing 20 includes a second gear 266 having second teeth 26A that mesh with the first teeth 78A. In this case, the rotary damper 78 can reduce the impact when the lid body 50 is opened by the biasing force of the torsion coil spring 74 . Also, the first teeth 78A and the second teeth 26A mesh with each other during the process of attaching the lid body 50 to the housing 20 . Therefore, the gas rice cooker 1 can facilitate the operation of attaching the lid 50 to the housing 20 . Furthermore, the second gear 266 is integrally molded with the receiving portion 26 of the housing 20 . In this case, a configuration in which the housing 20 is provided with the second gear 266 can be easily realized. Also, the strength of the second gear 266 can be maintained.

The position of the center C2 of the arc extending along the second tooth 26A of the receiving portion 26 coincides with the position of the center C1 of the shaft 73. As shown in FIG. In this case, the gas rice cooker 1 can mesh the first teeth 78A of the first gear 781 with the second teeth 26A of the second gear 266 over the entire range of movement when the lid 50 is opened and closed. . Therefore, the gas rice cooker 1 can reduce the impact when the lid 50 is opened by the rotary damper 78 over the entire moving range of the lid 50 .

The lid 50 is attached to the housing 20 by moving the shaft 73 forward along the first recess 264 and then downward along the second recess 265 . In this case, the possibility of the lid detaching from the receiving portion 26 can be reduced. In the gas rice cooker 1 , the lid covering portion 56 covers the shaft 73 from both left and right sides, and the housing covering portion 27 covers the shaft 73 from the radial direction. Therefore, the aesthetic appearance of the gas rice cooker 1 can be maintained even better.

<Modification>
The present invention is not limited to the above embodiments, and various modifications are possible. The present invention can also be applied to other rice cookers other than the gas rice cooker 1 (for example, an electric rice cooker). The first fixing portion 55 that fixes the first plate portion 71 of the hinge portion 70 of the lid body 50 may have a configuration different from that of the first protruding portion 55A. For example, the first fixing portion 55 may have a hook-shaped portion that engages with the first plate portion 71 . The second fixing portion 25 that fixes the second plate portion 72 of the hinge portion 70 of the housing 20 may have a configuration different from that of the second projecting portion 25A. For example, the second fixing portion 25 may have a hook-shaped portion that engages with the second plate portion 72 .

The first protruding portion 55A may be arranged below the first hooked end portion 76A of the first locking portion 761 . The one end portion 741 of the torsion coil spring 74 may be sandwiched from both sides in the vertical direction by the first hooked end portion 76A and the first projecting portion 55A. The second protruding portion 25A may be arranged on the front side of the second hooked portion 77A of the second locking portion 771 . The other end portion 742 of the torsion coil spring 74 may be sandwiched from both sides in the front-rear direction by the second distal hook-shaped portion 77A and the second projecting portion 25A. The rotary damper 78 may be provided on the lid 50 . The second tooth 26A may be provided on the second plate portion 72 . The second gear 266 does not have to be integrally molded with the receiving portion 26 of the housing 20 . For example, the second gear 266 may be detachable from the receiving portion 26 . The center C2 of the arc extending along the second tooth 26A of the receiving portion 26 and the center C1 of the shaft 73 may not coincide. The receiving portion 26 may have only the first recess 264 and may not have the second recess 265 . The first recess 264 may extend while curving forward and obliquely downward. The first recess 264 may be provided with a projection that prevents the shaft 73 from coming off. The housing cover 27 may be provided on the lid 50 instead of the housing 20 .

<Others>
The horizontal direction is an example of the "axial direction" in the present invention. The front-back direction is an example of the "perpendicular direction" of the present invention. The rear side is an example of the "perpendicular side" of the present invention. The front side is an example of the "other side in the orthogonal direction" of the present invention.

1: gas rice cooker 2K: inner pot 10: housing 20: housing 20K: housing portion 25: second fixing portions 25A, 25L, 25R: second projecting portions 26, 26L, 26R: receiving portion 26A: second teeth 27: housing covering portion 50: lid 55: first fixing portions 55A, 55L, 55R: first projecting portions 56, 56L, 56R: lid covering portions 57, 57L, 57R: shaft supporting portion 70: hinge portion 71 : First plate portion 72 : Second plate portion 73 : Shafts 74, 74L, 74R : Torsion coil spring 76A : First distal hooked portion 76B : First proximal hooked portion 77A : Second distal hooked portion 77B : Second proximal hook-shaped portions 78, 78L, 78R: Rotary damper 78A: First tooth 264: First recess 265: Second recess 266: Second gears 741, 741L, 741R: One end 742, 742L, 742R: Others End portions 761, 761L, 761R: First locking portions 762, 762L, 762R: First through holes 771, 771L, 771R: Second locking portions 772, 772L, 772R: Second through holes 781: First gear C1 , C2: center

Claims (7)

a housing having an accommodating portion in which the inner pot is accommodated;
a lid capable of opening and closing the housing portion of the housing;
A rice cooker comprising a hinge portion that supports the lid so as to be openable and closable with respect to the housing,
The hinge portion
a shaft;
a first plate portion rotatably supported by the shaft and fixed to the lid;
a second plate portion rotatably supported by the shaft and fixed to the housing;
A torsion coil spring wound around the shaft, one end of which is engaged with the surface of the first plate opposite to the surface facing the lid, and the other end of which is engaged with the second plate. the torsion coil spring engaged with the surface of the plate portion opposite to the surface facing the housing;
The lid is
a lid covering portion that covers both ends of the shaft from both sides in the axial direction;
a shaft supporting portion that rotatably supports both end portions of the shaft inside the lid covering portion;
A first fixing portion that fixes the first plate portion,
The housing is
a receiving portion provided on one side of the orthogonal direction extending horizontally perpendicular to the axial direction and receiving the shaft;
A second fixing portion that fixes the second plate portion,
The receiving part is
Having at least a first recess recessed toward the other side in the orthogonal direction,
The first plate portion is
a first locking portion extending in a direction protruding from the lid body and having a first hook-shaped portion at its tip;
a first through hole formed at a position facing the first hook-shaped portion;
with
The first fixing part is
Having a first protrusion that is inserted into the first through hole,
A rice cooker , wherein one end of the torsion coil spring locked by the first locking portion is held between the first hook-shaped portion and the first projecting portion . a housing having an accommodating portion in which the inner pot is accommodated;
a lid capable of opening and closing the housing portion of the housing;
A rice cooker comprising a hinge portion that supports the lid so as to be openable and closable with respect to the housing,
The hinge portion
a shaft;
a first plate portion rotatably supported by the shaft and fixed to the lid;
a second plate portion rotatably supported by the shaft and fixed to the housing;
A torsion coil spring wound around the shaft, one end of which is engaged with the surface of the first plate opposite to the surface facing the lid, and the other end of which is engaged with the second plate. the torsion coil spring engaged with the surface of the plate portion opposite to the surface facing the housing;
The lid is
a lid covering portion that covers both ends of the shaft from both sides in the axial direction;
a shaft supporting portion that rotatably supports both end portions of the shaft inside the lid covering portion;
A first fixing portion that fixes the first plate portion,
The housing is
a receiving portion provided on one side of the orthogonal direction extending horizontally perpendicular to the axial direction and receiving the shaft;
A second fixing portion that fixes the second plate portion,
The receiving part is
Having at least a first recess recessed toward the other side in the orthogonal direction,
The second plate portion is
a second locking portion extending in a direction protruding from the housing and having a second hook-shaped portion at its tip;
a second through hole formed at a position facing the second hook-shaped portion;
with
The second fixing part is
Having a second protrusion that is inserted into the second through hole,
The rice cooker, wherein the other end of the torsion coil spring locked by the second locking part is held between the second hook-shaped part and the second projecting part. a rotary damper having a first gear having a first tooth is provided on the first plate;
the housing comprises a second gear having a second tooth that meshes with the first tooth;
3. The rice cooker according to claim 1, wherein the first teeth and the second teeth mesh with each other during the process of attaching the lid to the housing. 4. The rice cooker according to claim 3 , wherein said second gear is integrally formed with said receiving portion. 5. The rice cooker according to claim 3 , wherein the center of the arc extending along the second tooth passes through the center of the shaft. The receiving part is
the first recess; and
6. The rice cooker according to any one of claims 1 to 5 , further comprising a second recess provided in the bottom of the first recess and recessed downward. 7. The rice cooker according to any one of claims 1 to 6 , further comprising a housing cover provided on the housing and covering the shaft from the radial direction.

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