Lid-equipped container

Abstract

To provide a lid-equipped container capable of further improving a lid attaching / detaching mechanism for detachably attaching a lid body rotatably attached to a container body via a hinge part to the container body.SOLUTION: A lid attachment / detachment mechanism 30 is provided for attaching and detaching an insulated lid, which is attached rotatably via a hinge part 20, to an insulated container in a manner that allows it to be attached and detached freely. When a connection part 31 is connected to a connection receiving part 32, the lid attachment / detachment mechanism 30 has one locking part 34 and the other locking part 35 lock together, thereby fixing the connection part 31 to the connection receiving part 32. By pressing a locking member 33 toward the other side of the rotation direction against a force of a biasing member 21, the engagement between the one locking part 34 and the other locking part 35 is released, and the connection part 31 becomes detachable from the connection receiving part 32.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a container with a lid. [Background technology]

[0002] For example, there is a thermal cooker that uses a lidded container, such as a cooking pot containing ingredients, which is heated to a boil on a stove or the like and then placed in a thermal container with a vacuum insulation structure, thereby trapping the heat applied to the cooking pot and cooking the ingredients while keeping them warm (see, for example, Patent Document 1 below).

[0003] Specifically, the heat-retaining cooker comprises an insulated outer container (heat-retaining container) having a vacuum insulation structure, an insulated outer container lid that closes the upper opening of the insulated outer container, an inner container (cooking pot) contained in the insulated outer container, and an inner container lid that closes the upper opening of the inner container.

[0004] This type of cooker eliminates the need for continuous heating when cooking food over long periods of time, making it safer and saving on energy costs. It also saves time and effort by eliminating the need to keep an eye on the cooking pot while cooking.

[0005] Furthermore, the following Patent Document 1 discloses an insulated cooking container comprising an outer container with insulating properties, an inner container housed in the outer container so as to be freely inserted and removed, and an insulating lid member that is attached to the outer periphery of the mouth of the outer container so as to be freely opened and closed and that closes the mouth opening of the outer container when the inner container is housed therein, characterized in that the lid member has a hinge shaft on its periphery, a hinge body rotatably attached to the hinge shaft, and a spring with one end protruding radially inward, one end of the spring engaged with the hinge member in a state that urges the lid member in the opening direction, a hook locking portion is provided on the periphery on the side opposite the hinge portion, and an annular shoulder member is provided on the periphery of the outer container, the shoulder member having a hinge receiving portion to which the hinge portion of the lid member is detachably attached and a hook provided on the side opposite the hinge receiving portion. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-206017 Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, the above-mentioned Patent Document 1 discloses a configuration in which, when removing the lid member from the outer container, the lid member is opened and then a push button provided on the elastic piece of the hinge portion is pressed toward the container side, thereby bending the elastic piece toward the container so that the locking protrusion can overcome the locking claw, and the lid member and hinge portion are lifted upward and removed from the outer container.

[0008] Furthermore, the above-mentioned Patent Document 1 discloses a configuration in which a pair of left and right locking protrusions engaged with the lower opening end of the passage of the hinge receiving part are pushed in with fingers, the pair of resilient pieces are bent to release the engagement of the respective locking protrusions, and the cover member is lifted, thereby removing the hinge part main body attached to the hinge receiving part.

[0009] However, in this type of configuration, the strength of the resilient piece needs to be increased to prevent it from breaking due to elastic fatigue caused by repeated use. On the other hand, if the strength of the resilient piece is increased, a large force is required to release the engagement between the locking protrusion and the locking claw. Therefore, the increased strength of the resilient piece makes it more difficult to remove the hinge body attached to the hinge receiving part.

[0010] Furthermore, in the configuration in which the above-mentioned pair of left and right resilient pieces are bent to release the engagement between the locking protrusion and the locking claw (the lower opening end of the passage in the hinge receiving portion), when the lid member is opened and swung left and right, the engagement between the locking protrusion and the locking claw may be released, causing the lid member to inadvertently come off the outer container.

[0011] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a lidded container that allows for further improvements to the lid attachment / detachment mechanism that detachably attaches a lid body, which is rotatably attached to the container body via a hinge portion, to the container body. [Means for solving the problem]

[0012] In order to achieve the above object, the present invention provides the following means. [1] A container body with an open top; a lid that is rotatably attached to the container body via a hinge portion, and that opens and closes the top opening of the container body while being biased in a direction that opens the top opening of the container body by a biasing member provided on the hinge portion; a lid attachment / detachment mechanism for detachably attaching the lid to the container body, The lid attachment / detachment mechanism includes a connection portion protruding from the hinge portion provided on the lid body side toward the container body side; a connection receiving portion provided on the container body side and connected to the connection portion when inserted therein; a locking member rotatably provided on the connection portion in a state where the locking member is biased in one direction of the rotation by the biasing member; one of the locking portions provided on the locking member; the other locking portion provided on the connection receiving portion, When the connection portion is connected to the connection receiving portion, the one locking portion and the other locking portion are locked to each other, thereby fixing the connection portion to the connection receiving portion, A lidded container characterized in that by pressing the locking member toward the other side of the rotation direction against the force of the biasing member, the engagement between the one engaging portion and the other engaging portion is released, making the connection portion removable from the connection receiving portion. [2] The lid attaching / detaching mechanism includes an accommodating recess and one of the guide portions provided in the connecting portion, a rotation fulcrum portion provided on the locking member and another guide portion, With the locking member accommodated in the accommodation recess, the locking member is rotated around the rotation fulcrum portion that is in contact with the inner surface of the accommodation recess, and The container with lid described in [1] above, characterized in that the one guide portion and the other guide portion engage with each other, and the locking member is guided so as to be freely rotatable. [3] The hinge portion has an inner hinge bearing portion provided on the connection portion side, a pair of outer hinge bearing portions provided on the cover body side, and a hinge shaft journaled in a shaft hole penetrating these hinge bearing portions in a rotation axis direction with the inner hinge bearing portion positioned between the pair of outer hinge bearing portions, The lidded container described in [1] is characterized in that the biasing member is a coil-shaped spring member and is arranged inside the inner hinge bearing portion with the hinge shaft passing through the spring member. [4] The spring member has an elastic displacement portion that protrudes toward the connection portion, The container with lid described in [3] above is characterized in that the locking member has a hook portion that hooks onto the elastically deformable portion. [5] The lidded container according to [3], wherein the locking member has an axial hole through which the hinge shaft passes and is supported so as to be rotatable around the axis of the hinge shaft. [6] The container body is an insulated container having a vacuum insulation layer between an outer container and an inner container, the lid body is a heat-insulating lid having a heat-insulating layer provided between an outer casing and an inner casing, a cooking container with a lid that is accommodated inside the insulated container; The lidded container described in [1] is characterized in that it is a heat-retaining cooker that keeps the ingredients in the lidded cooking container warm by placing the lidded cooking container inside the insulated container in a heated state and then closing the top opening of the insulated container with the insulated lid. [Effects of the Invention]

[0013] As described above, according to the present invention, a lidded container is provided that allows for further improvements to the lid attachment / detachment mechanism that detachably attaches a lid body, which is rotatably attached to the container body via a hinge portion, to the container body. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing the configuration of a heat-retaining cooker according to an embodiment of the present invention; [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the heat-retaining cooker shown in FIG. [Figure 3] 2 is a perspective view showing a state in which the insulating lid is removed from the insulating container of the heat-retaining cooker shown in FIG. 1. FIG. [Figure 4] 2 is a cross-sectional view showing the heat-retaining cooker shown in FIG. 1 with the insulating lid in an open position. [Figure 5] 2 is a cross-sectional view showing the heat-retaining cooker shown in FIG. 1 with the insulating lid in a closed position. [Figure 6] 2 is a perspective view showing the configuration of a lid attaching / detaching mechanism of the heat-retaining cooker shown in FIG. 1. FIG. [Figure 7] FIG. 7 is a cross-sectional view showing the configuration of the lid attaching / detaching mechanism shown in FIG. [Figure 8] FIG. 7 is a cross-sectional perspective view showing the configuration of the lid attaching / detaching mechanism shown in FIG. [Figure 9] 7 is a cross-sectional view showing a state in which a locking member of the lid attaching / detaching mechanism shown in FIG. 6 is pressed. [Figure 10] 7 is a cross-sectional perspective view showing a state in which a locking member of the lid attaching / detaching mechanism shown in FIG. 6 is pressed. FIG. [Figure 11] 1A is a perspective view of the locking member as seen from the rear side, and FIG. 1B is a perspective view of the locking member as seen from the front side. [Figure 12] FIG. 10 is a cross-sectional perspective view showing a state before the locking member is assembled to the connecting portion. [Figure 13] 10 is a cross-sectional view of a modified lid attachment / detachment mechanism taken in a direction perpendicular to the hinge axis. FIG. [Figure 14] 14 is a cross-sectional perspective view of the lid attachment / detachment mechanism shown in FIG. 13 in a direction along the hinge axis. FIG. [Figure 15]14 is a cross-sectional view showing a state in which a locking member of the lid attaching / detaching mechanism shown in FIG. 13 is pressed. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As one embodiment of the present invention, a heat-retaining cooker 1 shown in, for example, Figs. 1 to 15 will be described.

[0016] FIG. 1 is a perspective view showing the configuration of the heat-retaining cooker 1. FIG. 2 is an exploded perspective view showing the configuration of the heat-retaining cooker 1. FIG. 3 is a perspective view showing the heat-retaining cooker 1 with the insulated lid 3 removed from the insulated container 2. FIG. 4 is a cross-sectional view showing the heat-retaining cooker 1 with the insulated lid 3 in the open position. FIG. 5 is a cross-sectional view showing the heat-retaining cooker 1 with the insulated lid 3 in the closed position. FIG. 6 is a perspective view showing the configuration of the lid attachment / detachment mechanism 30 of the heat-retaining cooker 1. FIG. 7 is a cross-sectional view showing the configuration of the lid attachment / detachment mechanism 30. FIG. 8 is a cross-sectional view showing the configuration of the lid attachment / detachment mechanism 30. FIG. 9 is a cross-sectional view showing the state in which the locking member 33 of the lid attachment / detachment mechanism 30 has been pressed. FIG. 10 is a cross-sectional view showing the state in which the locking member 33 of the lid attachment / detachment mechanism 30 has been pressed. FIG. 11(A) is a perspective view of the locking member 33 as seen from the front, and FIG. 11(B) is a perspective view of the locking member 33 as seen from the rear. Figure 12 is a cross-sectional perspective view showing the state before locking member 33 is assembled to connecting portion 31. Figure 13 is a cross-sectional view in a direction perpendicular to hinge shaft 20c of modified lid attachment / detachment mechanism 30. Figure 14 is a cross-sectional perspective view in a direction along hinge shaft 20c of modified lid attachment / detachment mechanism 30. Figure 15 is a cross-sectional view showing the state when locking member 33 of modified lid attachment / detachment mechanism 30 has been pressed.

[0017] In the following description, the side where the insulated lid 3 is attached to the insulated container 2 (described later) via the hinge portion 20 (the right side in FIG. 4) will be referred to as the "rear side (back side) or rear" of the heat-retaining cooker 1, and the opposite side (the left side in FIG. 4) will be referred to as the "front side (front side) or front" of the heat-retaining cooker 1, with the direction connecting these being referred to as the front-to-rear direction. The side where the insulated lid 3 is located relative to the insulated container 2 will be referred to as the "upper side," and the side where the insulated container 2 is located relative to the insulated lid 3 will be referred to as the "lower side," with the direction connecting these being referred to as the "up-to-down direction." The direction perpendicular to the up-to-down direction will be referred to as the radial direction, and the radial direction perpendicular to the front-to-rear direction will be referred to as the "left-to-right direction." Unless otherwise specified, the following terms refer to directions when the insulated lid 3 is in the closed position (closed position) as shown in FIG. 5.

[0018] As shown in Figures 1 to 5, the heat-retaining cooker 1 of this embodiment comprises an insulated container 2 with an open top, an insulated lid 3 that opens and closes the top opening 2a of the insulated container 2, and a lidded cooking pot 4 that is contained inside the insulated container 2.

[0019] The insulated container 2 has a bottomed cylindrical outer container 5 and inner container 6 made of, for example, stainless steel as a container body with a vacuum insulation structure, and is configured as a double-structure container in which the mouths of the outer container 5 and inner container 6 are joined together with the inner container 6 housed inside the outer container 5. A vacuum insulation layer 7 is provided between the outer container 5 and inner container 6. The vacuum insulation layer 7 can be formed, for example, by blocking a vent hole provided in the bottom of the outer container 5 in a chamber that has been reduced to a high vacuum (evacuated).

[0020] The outer periphery of the insulated container 2 may be painted or printed. Although the present embodiment illustrates an insulated container 2 having a vacuum insulation structure, the insulated container 2 may have an insulation structure other than a vacuum insulation structure. Furthermore, the external shapes of the heat-retaining cooker 1 and the lidded cooking pot 4 are not particularly limited and can be modified as appropriate to suit the size, design, etc.

[0021] The insulated container 2 has a substantially circular bottom 2b, a substantially cylindrical body 2c that stands up from the outer periphery of the bottom 2b, and a flange 2d that protrudes from the upper end of the body 2c in the radially expanding direction around the entire circumference. The upper end of the body 2c opens in a circular shape as an upper opening 2a of the insulated container 2.

[0022] The heat-insulating container 2 has a structure in which a bottom member 8 is attached to the bottom portion 2b side, and a shoulder member 9 is attached to the upper side of the body portion 2c. Both the bottom member 8 and the shoulder member 9 are made of a resin molded body.

[0023] The bottom member 8 is formed into a flat, bottomed cylindrical shape overall. The bottom member 8 is attached in a state where it covers the bottom 2b of the insulated container 2. A plurality of legs 8a that support the insulated container 2 are provided on the lower surface of the bottom member 8 and aligned in the circumferential direction.

[0024] The shoulder member 9 is formed into a generally flat, cylindrical shape overall. The shoulder member 9 is attached to the insulated container 2 by fitting onto the outer periphery of the upper side of the body portion 2c while in contact with the flange portion 2d. A pair of handles 9a, each protruding like a flat plate in the radially expanding direction, are provided on both the left and right sides of the shoulder member 9, and a user can grasp the handles 9a to carry the heat-retaining cooker 1 (insulated container 2). Note that the shape and arrangement of the handles 9a are not necessarily limited to those described above and can be modified as appropriate.

[0025] The insulated lid 3 has an outer casing 10 made of, for example, a heat-resistant resin as a lid body having a thermal insulating structure, and an inner casing 11 also made of a heat-resistant resin, and is configured as a double-structure lid in which the outer casing 10 and the inner casing 11 are fitted together. The inside of the insulated lid 3 is configured such that air or a thermal insulating material (thermal insulating material in this embodiment) is arranged as a thermal insulating layer 12.

[0026] The outer housing 10 has a substantially disc-shaped upper wall portion 10a, an outer peripheral wall portion 10b that rises down from the outer periphery of the upper wall portion 10a in a substantially cylindrical shape, and a fitting recess 10c that cuts out the inner peripheral surface of the outer peripheral wall portion 10b along the entire circumference. The inner housing 11 has a substantially disc-shaped lower wall portion 11a, an inner peripheral wall portion 11b that rises up from the outer periphery of the lower wall portion 11a in a substantially cylindrical shape, a fitting protrusion 11c that protrudes along the entire circumference from the outer peripheral surface of the inner peripheral wall portion 11b, a central recess 11d that is a substantially truncated cone-shaped recess formed by recessing the center of the lower wall portion 11a upward, and outer peripheral recesses 13 that are recessed upward near the outer peripheries of both left and right ends of the lower wall portion 11a.

[0027] The outer housing 10 and the inner housing 11 are combined together to form the insulating lid 3 by fitting the inner peripheral wall portion 11b inside the outer peripheral wall portion 10b and fitting the fitting protrusion portion 11c into the fitting recess portion 10c.

[0028] The insulated lid 3 is rotatably attached to the rear side of the shoulder member 9 (insulated container 2) via a hinge portion 20. The insulated lid 3 is rotatably attached between a position where it closes the upper opening 2a (hereinafter referred to as the "closing position") and a position where it opens the upper opening 2a (hereinafter referred to as the "opening position") while being biased in a direction where the upper opening 2a of the insulated container 2 is opened (hereinafter referred to as the "opening direction") by a biasing member 21 provided on the hinge portion 20.

[0029] As shown in Figures 1, 6, 7 and 9, the hinge portion 20 has a pair of outer hinge bearing portions 20a provided on the side of the insulated lid 3, an inner hinge bearing portion 20b located between the pair of outer hinge bearing portions 20a, a hinge shaft 20c supported in an axial hole that passes through these hinge bearing portions 20a, 20b in the rotation axis direction (left and right direction), and a spring locking portion 20d formed in a concave shape at the rear of the inner housing 11 of the insulated lid 3.

[0030] 7 and 8, the biasing member 21 is a coil-shaped spring member, and is disposed inside the inner hinge bearing portion 20b with the hinge shaft 20c passing through the spring member. Meanwhile, the inner hinge bearing portion 20b is provided with a notched recess 20e for disposing the biasing member 21 inside. In this embodiment, the inner hinge bearing portion 20b and a connecting portion 31, which will be described later, are configured as two integrated parts, but this can be modified as appropriate, for example, by molding them as a single part.

[0031] 1, 6, 7 and 9, the spring locking portions 20d are provided at two locations on the left and right along the hinge shaft 20c in the hinge portion 20 of the inner housing 11 (insulating lid 3). The biasing member 21 has both ends thereof locked to the left and right spring locking portions 20d, respectively, and biases the insulating lid 3 in the opening direction.

[0032] As shown in Figures 1, 2, 4, and 5, the warming cooker 1 is provided with a lid locking mechanism 22 that secures the insulated lid 3 to the insulated container 2 in the closed position. The lid locking mechanism 22 has a container-side magnet 22a provided in front of the shoulder member 9 and a lid-side magnet 22b provided in front of the insulated lid 3, and the magnetic attraction between these magnets 22a and 22b secures the insulated lid 3 to the insulated container 2 in the closed position. Note that the lid locking mechanism 22 is not necessarily limited to this configuration and can be modified as needed as long as it is a mechanism that can secure the insulated lid 3 in the closed position. For example, one of the magnets 22a and 22b can be a magnetic metal piece.

[0033] As shown in FIGS. 1 to 5, lidded cooking pot 4 has pot body 14 with an open top and pot lid 15 that closes top opening 14a of pot body 14.

[0034] Pot body 14 is a metal container made of, for example, stainless steel. Pot body 14 has a substantially circular bottom 14b, a body 14c that stands up from the outer periphery of bottom 14b in a substantially spindle-cylindrical shape, and a substantially cylindrical neck 14d whose diameter is reduced at the top of body 14c. The upper end of neck 14d opens in a circular shape as upper opening 14a of pot body 14. However, pot body 14 is not necessarily limited to this shape and can be modified as appropriate.

[0035] A pair of handles 16 are attached to pot body 14, projecting upward and in the radial direction from both the left and right sides of neck portion 14d. Handle 16 is made of the same metal as pot body 14 and is joined to neck portion 14d. Handle 16 has handle stem 16a projecting upward and in the radial direction from both the left and right sides of neck portion 14d, and a handle cover 16b made of heat-resistant resin. Handle cover 16b is fixed integrally to handle stem 16a with screws so as to cover the top and bottom and the outer periphery of handle stem 16a.

[0036] The pot body 14 can be hooked onto the insulated container 2 via the handle stalk 16a of the handle 16. This prevents the bottom 14b from coming into direct contact with the inside bottom surface of the inner container 6 of the insulated container 2, suppressing heat conduction and contributing to improved heat retention. The user can also carry the pot body 14 by grasping the handle cover 16b of the handle 16.

[0037] In this embodiment, handle 16 is formed in a generally arcuate shape to fit the shape of neck opening 14d of pot body 14 and insulated lid 3, with both ends attached to opposing positions on the outer periphery of neck opening 14d (pot body 14) via a pair of handle stalks 16a. Handle 16 is not necessarily limited to this configuration and can be modified as appropriate.

[0038] Pot lid 15 is a lid made of heat-resistant glass surrounded by a metal such as stainless steel. Pot lid 15 has an approximately spherically curved, generally circular shape with convex surface 15a on the top surface (one surface) and concave surface 15b on the bottom surface (the other surface).

[0039] Pot lid 15 has a handle 17 in the center of its top surface. Handle 17 is made of, for example, heat-resistant resin. Handle 17 is the part with which the user grips pot lid 15, and has, for example, a flange shape with a gradually increasing diameter from the base end to the tip end, with the base end being screwed to the top surface of pot lid 15 and attached as one unit. Note that handle 17 is not necessarily limited to this shape and can be modified as appropriate.

[0040] In the heat-retaining cooker 1 of this embodiment, after the lidded cooking pot 4 containing ingredients is heated on a stove or the like to boiling, the pot lid 15 closes the upper opening 14a of the pot body 14. From this state, the lidded cooking pot 4 is placed inside the insulated container 2, and then the upper opening 2a of the insulated container 2 is closed with the insulated lid 3.

[0041] At this time, the handle portion 17 of the pot lid 15 is positioned inside the central recess 11d of the inner housing 11 (insulated lid 3), the handle portion 16 faces the outer peripheral recess 13, and the bottom wall portion 11a of the inner housing 11 (insulated lid 3) faces the flange portion 2d of the insulated container 2 and the lidded cooking pot 4 (pot lid 15). This creates an insulated space inside the insulated container 2, trapping and retaining the heat of the lidded cooking pot 4, allowing ingredients to be cooked while keeping them warm. Therefore, the heat-retaining cooker 1 of this embodiment does not require continuous heating, for example, when cooking food over a long period of time, which has the advantages of safety and saving on utility costs. Furthermore, the effort and time required to keep an eye on the lidded cooking pot 4 during warm cooking is eliminated.

[0042] Incidentally, the heat-retaining cooker 1 of this embodiment is provided with a lid attaching / detaching mechanism 30 for attaching the insulated lid 3 to the insulated container 2 in a detachable manner, as shown in FIGS.

[0043] As shown in Figures 6 to 8, the lid attachment / detachment mechanism 30 has a connection portion 31 protruding from the inner hinge bearing portion 20b of the hinge portion 20 toward the insulated container 2, a connection receiving portion 32 provided on the rear side of the shoulder member 9 and connected when the connection portion 31 is inserted inside, a locking member 33 provided rotatably on the connection portion 31 while being biased to one side in the rotation direction by the biasing member 21, one engaging portion 34 provided on the locking member 33, and the other engaging portion 35 provided on the connection receiving portion 32.

[0044] The connecting portion 31 is formed in a generally rectangular tubular shape and protrudes from below the inner hinge bearing portion 20b. On the other hand, the connection receiving portion 32 is located on the rear side of the shoulder member 9 and is formed in a generally rectangular tubular shape that opens in the vertical direction corresponding to the connecting portion 31.

[0045] The connection part 31 has a storage recess 31a which is a storage space that is open downward, and a rectangular opening 31b which exposes the stored locking member 33 to the outside (rear) by inserting it from the bottom side of the storage recess 31a to the inside. On the other hand, the connection receiving part 32 has a rectangular opening 32a at a position opposite the opening 31b of the connection part 31.

[0046] 7, 8, and 11(A) and (B), the locking member 33 is made of, for example, a resin molded body and is formed into a generally rectangular flat plate shape as a whole. The locking member 33 has a hook portion 36 protruding from the surface facing inward toward the accommodating recess 31a (the front in this embodiment). Meanwhile, the biasing member 21 has an elastic displacement portion 21a that extends from its center portion toward the inside of the accommodating recess 31a in a U-shaped manner in the vertical direction.

[0047] 12, the locking member 33 is inserted upward (in the direction of the arrow) from the lower side of the connecting portion 31 toward the inside of the accommodating recess 31a, and is assembled to the connecting portion 31 so that the elastic displacement portion 21a is hooked in the up-down and left-right directions relative to the hook portion 36, as shown in FIGS. 7 and 8. As a result, the locking member 33 is easily assembled to the connecting portion 31 inside the accommodating recess 31a in the manufacturing process and is prevented from coming off, and the locking member 33 abutting against the elastic displacement portion 21a is biased to one side in the rotation direction (rearward in this embodiment) by the elastic displacement portion 21a.

[0048] As shown in Figures 7, 8, 11(A), (B), and 12, the locking member 33 has a pressing portion 33a exposed outward (rearward) from the openings 31b, 32a of the connecting portion 31 and the connection receiving portion 32, an outer peripheral plane 33b which is a flat surface facing outward (rearward) and is positioned so as to surround the outer periphery on the upper side and both the left and right sides, and an assembly protrusion 33c which protrudes rearward in a stepped manner from the lower end of the upper outer peripheral plane 33b.

[0049] 9 and 10, the locking member 33 can be operated by pressing the pressing portion 33a toward the other side in the rotation direction (forward in this embodiment) against the bias of the elastic displacement portion 21a. Furthermore, due to the bias of the elastic displacement portion 21a, the outer peripheral flat surface 33b of the locking member 33 abuts against the inner (front) surface surrounding the opening 31b of the connecting portion 31, and the elastic displacement portion 21a is hooked in the vertical direction relative to the hook portion 36, so that the assembly protrusion 33c is engaged with the upper portion of the opening 31b, and the locking member 33 is assembled to the connecting portion 31.

[0050] In this embodiment, the biasing member 21 has both ends that bias the insulated lid 3 and an elastic displacement portion 21a in the center, but this is not necessarily limited to this configuration and can be modified as appropriate. For example, two biasing members 21 may be arranged, one on the left and one on the right, with one end biasing the insulated lid 3 and the other end biasing the locking member 33.

[0051] Furthermore, as shown in Figures 7, 8, and 11(A) and (B), the lid attachment / detachment mechanism 30 has one guide portion 37 provided on the connection portion 31, and a rotation fulcrum portion 38 and the other guide portion 39 provided on the locking member 33 to freely rotate the assembled locking member 33 by storing it inside the storage recess 31a.

[0052] In this embodiment, one guide portion 37 is formed by a pair of protrusions that protrude rearward in a substantially horizontal direction from the surface of the inside of the accommodating recess 31a that faces the locking member 33, and that are inclined downward toward the rear. The pivot fulcrum portion 38 is formed by the apex of a pair of inclined protrusions that are located near the upper end portions of both left and right sides of the hook portion 36 of the locking member 33, and that protrude downward and rearward. The other guide portion 39 is formed by a pair of protrusions that are aligned in the left-right direction below the hook portion 36 and that protrude forward in a substantially horizontal direction from the surface of the locking member 33 that faces inward toward the accommodating recess 31a (the front in this embodiment).

[0053] 9 and 10 , in the lid attachment / detachment mechanism 30 of this embodiment, when the locking member 33 is assembled to the connecting portion 31 and housed in the housing recess 31a, pressing the pressing portion 33a of the locking member 33 causes the lower side of the locking member 33 to rotate in the other direction in the rotation direction around the upper rotation fulcrum portion 38 that abuts from the rear on the inner wall surface of the housing recess 31a. Furthermore, this rotation of the locking member 33 causes the lower surface of the other guide portion 39 to move forward so as to ride up against the inclination of the upper surface side of one guide portion 37, whereby the one guide portion 37 and the other guide portion 39 engage with each other, and the locking member 33 is appropriately guided in the rotation direction. Furthermore, one guide portion 37 functions as a rotation stopper, and the lower side of locking member 33 rotates until the inner surface (rear) end of one guide portion 37 of accommodating recess 31a abuts against the inner surface (front) of accommodating recess 31a of locking member 33. The inclined surface on the lower side of rotation fulcrum portion 38 is inclined at an angle not to abut against the inner surface of accommodating recess 31a so as not to hinder the rotation of locking member 33.

[0054] Here, if the locking member 33 slides horizontally forward without rotating when the pressing portion 33a is pressed, it is expected that the locking member 33 will shift upward and forward relative to the connecting portion 31 and become detached. In contrast, the locking member 33 rotates correctly with its upper side as a fulcrum, which prevents the locking member 33 from becoming detached. In addition, by providing a pair of rotation fulcrum portions 38 near the upper end portions on both the left and right sides of the locking member 33, it is possible to prevent the locking member 33 from rattling when the pressing portion 33a is pressed.

[0055] Note that the one guide portion 37, the pivot portion 38, and the other guide portion 39 are not necessarily limited to the configurations described above, and may have any configuration that prevents the locking member 33 housed inside the housing recess 31a from coming off and guides it to rotate freely, and the shape, arrangement, number, etc. may be changed as appropriate. For example, one pair of one guide portion 37 and one pair of other guide portions 39 are provided, but one pair of each may be provided, or three or more may be provided.

[0056] 6 to 8 and 11(A) and (B), one of the locking portions 34 is composed of an inner locking wall surface 34a, which is a flat surface extending in the vertical direction and formed on the opening 31b side (rear) of the locking member 33, and a locking protrusion portion 34b that protrudes in a stepped manner rearward from the lower end of the inner locking wall surface 34a. The other locking portion 35 is composed of an outer locking wall surface 35a formed on the accommodating recess 31a side (front) above the opening 32a of the connection receiving portion 32, and a horizontal locking portion 35b that extends rearward from the lower end of the outer locking wall surface 35a by the plate thickness of the connection receiving portion 32.

[0057] In the lid attachment / detachment mechanism 30 of this embodiment, as shown in Fig. 6, the connection portion 31 is inserted into the connection receiving portion 32 from above, and when the connection portion 31 is connected to the connection receiving portion 32, one locking portion 34 and the other locking portion 35 are locked together, thereby fixing the connection portion 31 to the connection receiving portion 32. The connection portion 31 has a flat expanded diameter portion 31c that expands in the diameter direction above the portion that is inserted into the connection receiving portion 32. The connection portion 31 is inserted into the connection receiving portion 32 until the expanded diameter portion 31c abuts against the upper end of the connection receiving portion 32.

[0058] The lid attachment / detachment mechanism 30 of this embodiment will be described in more detail. The locking member 33 is formed so that its thickness in the front-to-rear direction is thinner at its lower end, and the position of its lower rear end is aligned with the position of the lower rear end of the portion of the connecting portion 31 that is inserted into the connection receiving portion 32. Therefore, when the connecting portion 31 is inserted into the connection receiving portion 32, the locking member 33, which is assembled integrally with the connecting portion 31, can also be smoothly inserted. In addition, a pressing portion 33a located at the rear of the locking member 33 extends obliquely upward from the lower end, and the upper end of the pressing portion 33a is continuous with the rear end of the locking protrusion 34b.

[0059] In the lid attachment / detachment mechanism 30, when the connection part 31 is inserted from above into the connection receiving part 32, as the connection part 31 moves downward, the locking member 33 is gradually biased forward by the outer locking wall surface 35a of the connection receiving part 32 along the inclination of the pressing part 33a. When the connection part 31 is fully inserted into the connection receiving part 32 and the connection is completed, as shown in FIGS. 7 and 8, the locking member 33 is biased toward one side (rearward) in the rotation direction by the biasing member 21, so the locking protrusion 34b overcomes the lower end of the outer locking wall surface 35a. This produces a clicking sensation, allowing the user to recognize that the connection part 31 (insulated lid 3) has been securely attached to the connection receiving part 32 (insulated container 2). Furthermore, the abutment of the inner locking wall surface 34a and the outer locking wall surface 35a prevents the locking member 33 from rotating any further and maintains the fixed state. Furthermore, since the locking projections 34b are locked to the horizontal locking portions 35b at the top and bottom, it is possible to prevent the insulating lid 3 from coming off even if the insulating lid 3 is pulled upward.

[0060] 1 and 4, when the insulated lid 3 is in the open position, as shown in Fig. 6, by pressing the pressing portion 33a of the locking member 33 to the other side in the rotation direction against the biasing force of the biasing member 21 as shown in Fig. 9 and 10, the inner locking wall surface 34a and the outer locking wall surface 35a are separated, and the vertical locking state between the locking protrusion 34b and the horizontal locking portion 35b is also released, thereby releasing the locking state between one locking portion 34 and the other locking portion 35. This allows the connection portion 31 to be removed upward from the connection receiving portion 32, making it possible to remove the insulated lid 3 from the insulated container 2 as shown in Fig. 3.

[0061] The connection portion 31 and the connection receiving portion 32 in the lid attachment / detachment mechanism 30 are not necessarily limited to the configuration described above, and may be configured in any way that allows the insulated lid 3 to be attached and detached freely to the insulated container 2 (shoulder member 9), and their shape, arrangement, etc. may be changed as appropriate.

[0062] Furthermore, the one locking portion 34 and the other locking portion 35 are not necessarily limited to the configuration described above, and any configuration is sufficient as long as, when the connection portion 31 is connected to the connection receiving portion 32, the one locking portion 34 and the other locking portion 35 are locked to each other, and the locked state between the one locking portion 34 and the other locking portion 35 is released by pressing the locking member 33 toward the other side in the rotation direction against the force of the biasing member 21, and the shape, arrangement, number, etc. of the configuration can be changed as appropriate.

[0063] As described above, in the heat-retaining cooker 1 of this embodiment, by being equipped with the above-mentioned lid attachment / detachment mechanism 30, the insulated lid 3, which is attached so as to be freely rotatable via the hinge portion 20, can be attached so as to be freely detachable to the insulated container 2.

[0064] Furthermore, in the heat-retaining cooker 1 of this embodiment, the biasing member 21 provided on the hinge portion 20 described above is used to bias the insulated lid 3 in the opening direction relative to the insulated container 2, and the elastic displacement portion 21a of the biasing member 21 can bias the locking member 33 in one direction of rotation. That is, the biasing member 21 can bias the insulated lid 3 in the opening direction and bias the locking member 33 to one side, and the opening direction of the insulated lid 3 and the one direction of the locking member 33 are biased in opposite directions by the biasing member 21. This makes it possible to use one biasing member 21 to bias two separate components with different functions in opposite directions, thereby saving space and reducing parts costs.

[0065] Furthermore, by using a coil-shaped spring member for the biasing member 21, there is no need to rely on the strength of conventional resin spring pieces, and therefore, damage due to repeated use can be prevented, and by adjusting the elastic force (spring force) of the elastic displacement portion 21a, it is possible to adjust in a balanced manner the connection strength of the connection portion 31 with the connection receiving portion 32 and the pressing force required to press the pressing portion 33a of the locking member 33.

[0066] As a result, in the heat-retaining cooker 1 of this embodiment, when the insulated lid 3 is in the open position, even if the insulated lid 3 is swung left and right, the engagement between one locking portion 34 and the other locking portion 35 is released, preventing the insulated lid 3 from accidentally coming off the insulated container 2.

[0067] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the lid attachment / detachment mechanism 30 can be modified as shown in Figures 13 to 15. Specifically, in this modification, the rotation fulcrum portion 38 and the other guide portion 39 for rotatably guiding the locking member 33 housed inside the housing recess 31a are omitted, and the locking member 33 has a shaft hole 33d through which the hinge shaft 20c passes, and is supported rotatably around the axis of the hinge shaft 20c. Note that, when the pressing portion 33a of the locking member 33 is pressed, one guide portion 37 abuts at the end point of the forward rotation, and functions as a stopper to prevent the locking member 33 from rotating any further.

[0068] This makes it possible to reliably prevent the locking member 33 from coming off the connecting portion 31 when the pressing portion 33a of the locking member 33 is pressed. Furthermore, in this modified example, the locking member 33 will not come off the connecting portion 31. For this reason, as shown in Fig. 14, the lower end side of the hook portion 36 is not hooked to the elastic displacement portion 21a in the vertical direction, but is hooked only in the horizontal direction for positioning purposes when the locking member 33 is assembled to the connecting portion 31.

[0069] The lidded container to which the present invention is applied is not limited to those constituting the heat-retaining cooker 1 described above, but the present invention can be widely applied to lidded containers equipped with a lid attachment / detachment mechanism that allows an insulated lid, which is attached rotatably via a hinge portion, to be attached and detached freely to the insulated container. [Explanation of symbols]

[0070] DESCRIPTION OF SYMBOLS 1...Insulated cooking appliance (container with lid) 2...Insulated container (container body) 3...Insulated lid (lid body) 4...Cooking pot with lid (cooking container with lid) 5...Outer container 6...Inner container 7...Vacuum insulation layer 8...Bottom member 9...Shoulder member 10...Outer casing 11...Inner casing 12...Insulation layer 13...Outer peripheral recess 20...Hinge portion 21...Biasing member (spring member) 30...Lid attachment / detachment mechanism 31...Connection portion 32...Connection receiving portion 33...Locking member 34...One locking portion 35...Other locking portion 36...Hook portion 37...One guide portion 38...Pivot fulcrum portion 39...Other guide portion

Claims

1. A container body having an open top; a lid that is rotatably attached to the container body via a hinge portion, and that opens and closes the top opening of the container body while being biased in a direction that opens the top opening of the container body by a biasing member provided on the hinge portion; a lid attachment / detachment mechanism for detachably attaching the lid to the container body, The lid attachment / detachment mechanism includes a connection portion protruding from the hinge portion provided on the lid body side toward the container body side; a connection receiving portion provided on the container body side and connected to the connection portion when inserted therein; a locking member rotatably provided on the connection portion in a state where the locking member is biased in one direction of the rotation by the biasing member; one of the locking portions provided on the locking member; the other locking portion provided on the connection receiving portion, When the connection portion is connected to the connection receiving portion, the one locking portion and the other locking portion are locked to each other, thereby fixing the connection portion to the connection receiving portion, A lidded container characterized in that by pressing the locking member toward the other side of the rotation direction against the force of the biasing member, the engagement between the one engaging portion and the other engaging portion is released, making the connection portion removable from the connection receiving portion.

2. The lid attaching / detaching mechanism includes an accommodating recess and one of the guide portions provided in the connecting portion; a rotation fulcrum portion provided on the locking member and another guide portion, With the locking member accommodated in the accommodation recess, the locking member is rotated around the rotation fulcrum portion that is in contact with the inner surface of the accommodation recess, and 2. The container with lid according to claim 1, wherein the one guide portion and the other guide portion are engaged with each other to guide the locking member rotatably.

3. the hinge portion has an inner hinge bearing portion provided on the connection portion side, a pair of outer hinge bearing portions provided on the cover body side, and a hinge shaft journaled in a shaft hole penetrating these hinge bearing portions in a rotation axis direction with the inner hinge bearing portion positioned between the pair of outer hinge bearing portions, 2. The container with lid according to claim 1, wherein the biasing member is a coil-shaped spring member and is arranged inside the inner hinge bearing portion with the hinge shaft passing through the spring member.

4. the spring member has an elastically deformable portion that protrudes toward the connection portion, 4. The container with lid according to claim 3, wherein the locking member has a hook portion for hooking the elastically deformable portion.

5. 4. The container with lid according to claim 3, wherein the locking member has a shaft hole through which the hinge shaft passes, and is supported so as to be rotatable about the axis of the hinge shaft.

6. The container body is an insulated container having a vacuum insulation layer between an outer container and an inner container, the lid body is a heat-insulating lid having a heat-insulating layer provided between an outer casing and an inner casing, a cooking container with a lid that is accommodated inside the insulated container; The lidded container according to claim 1, characterized in that the lidded cooking container is placed inside the insulated container in a heated state, and then the insulated lid closes the top opening of the insulated container, thereby keeping the ingredients in the lidded cooking container warm while cooking them.

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