JP4076993B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker including a heat radiating plate that is attached to and detached from a lower surface of a lid body.

  Conventionally, a heat sink that seals the inner pot is detachably provided on the lower surface of the lower plate that constitutes the lower surface of the lid body, and the lid hook that is engaged with the hook receiving portion on the rice cooker body side and the outer peripheral portion of the heat sink A rice cooker that is slidable in the same direction in a state in which engaging heat sink hooks are vertically stacked has been put into practical use (see Japanese Patent Application No. 2003-392574).

  In the lid hook, guide pieces formed on both sides of the advancing / retreating direction are inserted into guide grooves provided on the upper surface of the lower plate, and the lid hook is overlapped on the heat radiating plate hook. It is designed to move forward and backward.

  The heat radiating plate hook includes a plate portion that slides on the lower plate, and a hook portion that protrudes from the front end so as to be exposed on the lower surface of the lid body and faces in the backward direction. At the lower end of the hook portion, an inclined surface that is forwardly lowered in the vertical direction is formed.

  The heat sink hooks advance when the inclined surface is pushed upward by the outer peripheral portion, and simultaneously with the contact of the heat sink with the lower surface of the lid body, when the outer peripheral portion gets over the inclined surface, the heat dissipation The plate hook is retracted by an urging spring, and the outer peripheral portion is fitted and engaged with the hook portion.

  However, in the above rice cooker, in order to obtain a smooth slide, it is necessary to provide a slight vertical gap between the guide piece of the lid hook and the guide groove. Further, since the heat sink hook and the lid hook are provided so as to slide in a state where they overlap each other, a slight vertical gap is also generated between the heat sink hook and the cover hook.

  However, if there is such a gap, the lid hook will rattle upward and the radiator plate hook will rattle upward when the outer periphery of the radiator plate hits the inclined surface. Furthermore, since the hook portion is pushed upward by the heat radiating plate, an upward warp is generated. For these reasons, even if the heat sink comes into contact with the lower surface of the lid body, the outer peripheral portion does not reach the upper end of the inclined surface in the vertical direction of about 0.5 mm to 1 mm, and has still overcome the inclined surface. There was no case.

  In such a case, it is necessary to forcefully press the vicinity of the outer periphery of the heat sink from the state in which the heat sink is in contact with the lower surface of the lid body, and forcibly engage the outer periphery with the heat sink hook. Adversely affect.

  Accordingly, an object of the present invention is to provide a heat sink hook and a lid hook that are slidable in the same direction in a state where they are stacked one on top of the other, and when the outer periphery of the heat sink is pressed upward against the inclined surface of the hook portion When the heat sink is in contact with the lower surface of the lid main body, the outer peripheral portion has a structure for overcoming the inclined surface and engaging with the hook portion, while smoothly engaging the heat sink hook and the heat sink. Is to provide a cooker.

  In order to solve the above problems, the present invention comprises a lid body attached to a rice cooker body that accommodates an inner pot so as to be openable and closable, and a heat radiating plate attached to and detached from the lower surface of the lid body, A heat sink hook that engages with the outer peripheral portion of the heat sink and a lid hook that engages with a hook receiving portion on the rice cooker main body are slidably provided in the same direction in a state where they are vertically stacked. A hook portion having an inclined surface with respect to the vertical direction is provided on the lower surface of the hook so as to protrude downward. When the outer peripheral portion is pressed upward on the inclined surface, the heat radiating plate hook is advanced, and the heat radiating plate is moved to the lower surface of the lid body. In the rice cooker in which the outer peripheral portion gets over the inclined surface and engages with the hook portion, the heat sink hook comes into contact with the upper surface of the hook portion while the heat sink plate is advanced, and the hook portion At the same position in the vertical direction One hook support part employing the configuration provided. According to this configuration, even when the lid hook or the heat sink hook is rattled upward while the heat sink hook is advancing, contact of the hook support portion and the hook portion causes the hook portion to Upward displacement is reliably prevented. Further, since the hook portion is not displaced upward, it does not warp. Therefore, when the heat radiating plate comes into contact with the lower surface of the lid body, the outer peripheral portion of the heat radiating plate surely gets over the inclined surface, and the hook portion and the outer peripheral portion are smoothly engaged.

  As described above, according to the present invention, when the heat radiating plate comes into contact with the lower surface of the lid main body, the outer peripheral portion of the heat radiating plate surely gets over the inclined surface. Provided to be slidable in the same direction in a state where they are stacked vertically, when the outer periphery of the heat sink is pressed upward on the inclined surface of the hook part, the heat sink hook advances, and when the heat sink touches the lower surface of the lid body, It is possible to provide a rice cooker that can smoothly engage the heat radiating plate hook and the heat radiating plate while having a structure in which the outer peripheral portion gets over the inclined surface and engages with the hook portion.

  Hereinafter, the rice cooker which concerns on embodiment of this invention is demonstrated based on an accompanying drawing.

  As shown in FIGS. 1-3, a rice cooker is provided with the lid main body 20 attached to the rice cooker main body 10 which accommodates the inner pot 11 so that opening and closing is possible via a hinge part (illustration omitted).

  The lid body 20 is configured to close the inner pot accommodating opening that opens to the upper surface of the shoulder portion 12 of the rice cooker body 10, and includes an upper plate 21 that constitutes the upper surface and a lower plate 22 that constitutes the lower surface. It has an outer shell integrated vertically.

  The upper plate 21 is provided with a steam port 23 that communicates with the inner pot 11.

  On the lower surface of the lower plate 22, a flat circular region including the lower portion of the steam port 23 is recessed upward, and the recessed portion 24 is substantially horizontal. Further, a vertical wall portion 25 that is fitted to the front edge of the upper plate 21 is provided at the front end of the lower surface of the lower plate 22.

  The recessed portion 24 is provided with an opening 26 corresponding to the steam port 23, and this opening 26 constitutes a steam passage connecting the inner pot 11 and the steam port 23. In addition, the recessed portion 24 is provided with an opening 27 corresponding to the opening 26, and a heater cover 29 with a lid heater 28 is attached around the opening 27. A protrusion 30 is formed on the heater cover 29 so as to surround the periphery of the opening 27. A seal 31 fitted to the lower edge of the opening 26 and the edge of the opening 27 seals between the lower plate 22 and the heater cover 29.

  Furthermore, around the heater cover 29 of the recessed portion 24, a heat radiating plate 40 that seals the inner pot 11 in a state where the lid body 20 is closed is detachably mounted in the vertical direction. The heat radiating plate 40 includes a disc-shaped heat radiating plate main body 42 provided with a steam hole 41 corresponding to the opening 27 of the heater cover 29, a heat radiating plate packing 44 attached to the outer peripheral flange 43 of the heat radiating plate main body 42, The heat-radiating plate packing 44 is fixed, and the heat-radiating plate 40 includes a heat-radiating plate ring 45 that constitutes the outer peripheral portion of the heat-radiating plate 40. Further, a pair of projecting piece portions 46 are provided at the rear end portion of the heat sink plate 45. The heat radiating plate 40 was pressed upward with its projecting end portions 46, 46 inserted into the insertion ports 24 a, 24 a provided on the inner periphery of the recessed portion 24, with its front end facing the lower surface of the recessed portion 24. At this time, the upward movement is restricted by the heat sink main body 42 coming into contact with the protrusion 30 of the heater cover 29.

  Further, a horizontal portion 50 is formed on the upper surface of the recessed portion 24 toward the vertical wall portion 25. As shown in FIGS. 4 to 6, the horizontal portion 50 includes an angle wall 51 having a pair of opposed front and rear wall surfaces, two guide rails 52 extending between the angle walls in parallel in the front and rear direction, and a guide. Between the rails, there are provided a support rail 53 that is parallel to these, and a guide rail 52 and a through hole 54 that passes through the lower plate 22 vertically between the support rail 53 and the vertical wall portion 25.

  On the horizontal portion 50, a heat radiating plate hook 60 that engages with the heat radiating plate ring 45 of the heat radiating plate 40 and a lid hook 70 that engages with the hook receiving portion 13 on the rice cooker main body 10 side are stacked one above the other. They are slidable in the same direction (in this embodiment, the front-rear direction).

  The heat radiating plate hook 60 has a flat plate portion 61 and a hook portion 62 extending downward from the front end of the plate portion 61. The plate portion 61 has a rear end side having the same width as that between the angle walls 51, and a pair of guide ribs 61 a project from the lower surface of the rear end side. The plate portion 61 is guided in the advancing and retreating direction when the angle wall 51 and both side edges on the rear end side are in contact with each other, and each outer surface of the guide rib 61 a is in sliding contact with each inner surface of the guide rail 52. . The guide rail 52 and the support rail 53 position the plate portion 61 in the downward direction.

  Further, on the rear end side of the plate portion 61, a hooking portion 64 of a torsion spring 63 for urging the heat radiating plate hook 60 in the backward direction is erected, and each spring piece portion of the torsion spring 63 is respectively The corresponding angle wall 51 is locked in the notch 51a.

  Further, the plate portion 61 is provided with a rectangular hole 65 in the forward / backward direction, and the rear end edge of the rectangular hole 65 is located on the rear end side of the coil spring 66 that urges the lid hook 70 in the advance direction. It is set as the spring mounting part 65a to fit.

  The hook portion 62 connected to the front end of the plate portion 61 has a hook-like portion 62a that extends downward from the through hole 54 of the horizontal portion 50 and is directed backward. The hook-like portion 62a is engaged with a hook receiving portion 47 formed on the outer periphery of the heat sink plate 45 in the backward direction, and supports the lower surface of the hook receiving portion 47 upward in the engaged state.

  At the lower end of the hook-shaped portion 62a, there is an inclined surface 62b that is forwardly lowered with respect to the vertical direction, and triangular plate-shaped reinforcing ribs 62c that are provided on both sides of the upper surface of the inclined surface 62b in a direction parallel to the advancing and retracting direction. Is formed.

  When the heat sink 40 is mounted, the inclined surface 62b causes the heat sink plate 60 to advance when the hook receiving portion 47 is pressed upward, and the heat sink main body 42 of the heat sink 40 is moved to the protrusion 30 of the heater cover 29. When contact is made, the hook receiving portion 47 gets over the inclined surface 62b, and the heat radiating plate hook 60 moves backward so that the hook-shaped portion 62a and the hook receiving portion 47 are engaged.

  The reinforcing rib 62c has a horizontal surface 62d that protrudes forward from the upper surface of the inclined surface 62b. The horizontal surface 62d is in horizontal contact with the lower surface of the hook support portion 25a formed by notches provided in both side widths corresponding to the hook portions 62 of the vertical wall 25, even when the heat radiating plate hook 60 is in the forward or backward position. It is provided to do. As a result, the horizontal surface 62d of the reinforcing rib 62c reliably makes horizontal contact with the lower surface of the hook support portion 25a while the radiator plate hook 60 is advanced or retracted, and keeps the hook portion 62 at the same position in the vertical direction. ing.

  On the other hand, the lid hook 70 is bent downward from the flat plate portion 71 that overlaps the plate portion 61 of the heat radiating plate hook 60, the taper portions 72 provided on both sides of the flat plate portion 71 on the front side. The hook portion 73 has an alignment hole 74 that opens between the tapered portion 72 and the hook portion 73 and into which the hook portion 62 of the heat sink hook 60 is inserted.

  The flat plate portion 71 has guide pieces 71a protruding from both sides on the rear side. The guide piece 71 a is provided so as to have the same width on both sides as the tapered portion 72, and is inserted into a guide groove 55 provided between the angle wall 51 of the horizontal portion 50 and the through hole 54. The guide groove 55 includes a guide wall 55a that is slidably brought into sliding contact with each outer surface of the guide piece 71a, an inverted T-shaped rib 55b that regulates the upward movement of the flat plate portion 71 with a slight margin, and an inverted T-shape. It consists of a front wall 55c provided between the rib 55b and the through hole 54, and a support wall 55d provided at the same height as the guide rail 53 in the vertical direction. The front wall 55c is provided so as to contact the front surface of the guide piece 71a in a state where the lid hook 70 is in the advanced position.

  Further, the flat plate portion 71 is provided with a rectangular hole 75 at a position corresponding to the rectangular hole 65 of the heat radiating plate hook 60, and a spring mounting portion 65 a of the heat radiating plate hook 60 is inserted therein. The front end edge of the rectangular hole 75 is a spring mounting portion 75a that fits the front end side of the coil spring 66, whereby the coil spring 66 expands and contracts according to the forward and backward movement of the lid hook 70 and the heat sink hook 60. The lid hook 70 is urged in the advance direction.

  When the taper portion 72 is pushed by the pushing portion 81 protruding from the lower surface of the operation button 80 pivotally supported by the upper plate 21 of the lid body 20, the hook portion 73 and the hook receiving portion 13 of the shoulder portion 12 are engaged. The lid hook 70 is provided to be retracted until it is released.

  The hook portion 73 is provided in a straight line so that the front end edge protrudes more forward than the front end edge of the upper plate 21 with the lid hook 70 in the advanced position. As the lid body 20 is closed, the hook portion 73 comes into contact with the upper edge of the shoulder portion 12 and moves backward by the bias of the coil spring 66. When the lid body 20 reaches the closed position, the hook receiving portion 13 is moved forward. To be engaged.

  When the lid hook 70 is retracted, the mating hole 74 opened between the taper portion 72 and the hook portion 73 contacts the hook portion 62 of the heat sink hook 60 to position the lid hook 70 in the retracting direction. It is provided to do.

  The operation of the heat sink hook 60 and the lid hook 70 in the above configuration will be described. As shown in FIGS. 7A and 8A, when the heat sink 40 is not attached to the lid body 20, the hook receiving portion 47 is not engaged with the hook portion 62. Reference numeral 60 denotes a position in which the horizontal surface 62 d of the hook portion 62 is in a position retracted by the urging force of the torsion spring 63 in a state where the horizontal surface 62 d is in horizontal contact with the lower surface of the hook support portion 25 a of the vertical wall portion 25. The lid hook 70 is also slid to the retracted position by following it through the coil spring 66, and the hook portion 73 is in a position retracted from the front edge of the upper plate 21. Here, when the heat radiating plate 40 is attached to the lid main body 20, the hook receiving portion 47 presses the inclined surface 62 b of the hook portion 62 upward, and accordingly, the heat radiating plate hook 60 is connected to the horizontal surface of the hook portion 62. 62d advances against the urging force of the torsion spring 63 while maintaining a state in which it horizontally contacts the hook support portion 25a.

  Then, as shown in FIGS. 7B and 8B, when the heat radiating plate 40 comes into contact with the protruding portion 30 of the heater cover 29, the hook receiving portion 47 gets over the inclined surface 62b and engages with the hook portion 62. Match. By this engagement, the radiator plate hook 60 maintains the advanced state against the urging force of the torsion spring 63. The lid hook 70 is driven by the advancement of the heat sink hook 60 via the coil spring 66 and slides to the advance position. In this state, the hook portion 73 protrudes forward from the front end edge of the upper plate 21, and can be engaged with the hook receiving portion 13 of the shoulder portion 12.

  Here, when the lid body 20 is closed, the hook portion 73 comes into contact with the upper edge of the shoulder portion 12, and the lid hook 70 moves backward with respect to the heat radiating plate hook 60 against the urging force of the coil spring 66. When the lid body 20 is completely closed, the lid hook 70 is advanced by the urging force of the coil spring 66, and the hook portion 73 is engaged with the hook receiving portion 13. And when removing the heat sink 40, if the heat sink hook 60 is pushed in the advancing direction with a finger, the engagement of the hook part 62 and the hook receiving part 47 will be released.

  As shown in FIG. 9, the hook receiving portion 13 is formed in a hollow shape that is slightly wider than the width on both sides of the hook portion 73 at a corresponding position of the shoulder portion 12, and its upper wall portion. The inverted T-shaped portion 14 that is a contact portion with the hook portion 73 is provided on the center in the width direction of 13a. Thus, if the contact part with the hook part 73 is made into an inverted T shape, since the continuous part of the inverted T shape part 14 and the upper wall part 13a will become thin, it will become difficult to produce a sink mark in the shoulder part 12. FIG. Further, since the inverted T-shaped portion 14 is provided with a width on the center in the width direction, the lid main body 20 is compared with the case where a plurality of rib portions are provided on both sides of the hook receiving portion 13 as in the prior art. The hook portion 73 is unlikely to become one-sided when the side shifts to the closed position.

  Next, when the lid main body 20 is opened, when the operation button 80 is pushed downward, the taper portion 72 of the lid hook 70 is pushed backward by the pushing portion 81. Along with this, the lid hook 70 retracts with respect to the heat sink hook 60 while contracting the coil spring 66. Thereby, the hook part 73 is retracted from the front end edge of the upper plate 21, and the engagement with the hook receiving part 13 is released (see FIG. 6).

The partial expansion vertical side view of the heat sink hook vicinity of the rice cooker which concerns on embodiment. The whole perspective view which shows the front right diagonal upper view of a rice cooker same as the above. The perspective view which shows the front right diagonal upper direction of the state which removed the heat sink of the rice cooker same as the above. The disassembled perspective view which shows the front right diagonal upward view of a heat sink hook and lid | cover hook same as the above. (A) The perspective view which shows the front right diagonal upper view of a heat sink hook and lid hook same as the above. (B) The top view which shows the upper surface view of the same heat sink hook and lid hook by notching the upper plate. The partial expanded vertical side view which shows the heat sink hook vicinity at the time of operation | movement of the operation button same as the above. (A) The perspective view which shows the front right diagonal upper direction vicinity of the heat sink hook of the cover main body of the state which has mounted | wore with the heat sink same as the above. (B) The perspective view which shows the front right diagonal upper view near the heat sink hook of the lid body of the state which mounted | wore with the heat sink same as the above. (A) The partial expanded vertical side view which shows the heat sink hook vicinity of FIG. 7 (a) figure. (B) The partial expanded vertical side view which shows the heat sink hook vicinity of FIG.7 (b) figure. (A) The partial expansion perspective view which shows the hook receiving part vicinity of a shoulder part same as the above. (B) The partial expanded rear view which shows the rear view of the hook receiving part vicinity of a figure. (C) The elements on larger scale which show the top view of a mode that a hook part engages with the hook receiving part of a figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rice cooker body 11 Inner pan 12 Shoulder part 13 Hook receiving part 13a Upper wall part 14 Reverse T-shaped part 20 Lid body 21 Upper plate 22 Lower plate 23 Steam port 24 Recessed part 24a Insertion port 25 Vertical wall part 26 Opening 27 Opening 28 Lid heater 29 Heater cover 30 Protruding part 31 Seal 40 Heat sink 41 Steam hole 42 Heat sink main body 43 Outer peripheral flange 44 Heat sink packing 45 Heat sink ring 46 Projection piece 47 Hook receiving part 50 Horizontal part 51 Angle wall 51a Notch 52 Guide rail 53 Support rail 54 Through hole 55 Guide groove 55a Guide wall 55b Reverse T-shaped rib 55c Front wall 55d Support wall 60 Heat sink plate 61 Plate part 61a Guide rib 62 Hook part 62a Hook-like part 62b Inclined surface 62c Reinforcement Rib 62d Horizontal surface 63 Torsion spring 64 Hook 65 Rectangular Hole 65a Spring mounting portion 66 Coil spring 70 Lid hook 71 Flat plate portion 71a Guide piece 72 Taper portion 73 Hook portion 74 Matching hole 75 Rectangular hole 75a Spring mounting portion 80 Operation button 81 Extruding portion

Claims (1)

  A lid body attached to the rice cooker body that accommodates the inner pot is detachably attached to the lower surface of the lid body, and engages with an outer peripheral portion of the heat sink in the lid body. A heat sink hook and a lid hook that engages with a hook receiving portion on the rice cooker body side are provided so as to be slidable in the same direction, and the lower surface of the heat sink hook has an inclined surface with respect to the vertical direction. When the outer peripheral portion is pressed upward on the inclined surface, the heat sink hook is advanced, and when the heat sink touches the lower surface of the lid body, the outer peripheral portion is inclined to the inclined surface. In the rice cooker that gets over and engages with the hook part, a hook support part that contacts the upper surface of the hook part while the radiator plate hook is advanced to the lid body and keeps the hook part at the same position in the vertical direction. It is characterized by having established Rice cooker.

Images