JP4950128B2 - Pressure cooker - Google Patents

Description

  The present invention relates to a pressure cooker.

  A rice cooker, which is one of the cookers, includes a main body that houses an inner pot and a lid that is attached to the main body so as to be openable and closable, and heats the inner pot by heating means disposed inside the main body. The rice cooked in the inner pot is cooked. In addition, this type of rice cooker is provided with a sealing member that closes the vent hole of the exhaust passage so as to be located in the exhaust passage, so that the inner pot can be pressurized to a pressure higher than atmospheric pressure. There is a built-in pressure rice cooker.

  And in this pressure-type rice cooker, when the inside of the inner pot is pressurized and the lid is configured to be openable, when the user unexpectedly performs an opening operation, the lid opens vigorously, Steam may spout out. Therefore, in this type of pressure rice cooker, in the state in which the inside of the inner pot can be pressurized to a pressure higher than atmospheric pressure, the lock member of the lid engaged with the main body moves in the disengagement direction, or the lock member There is provided a moving member (lock mechanism) for disabling the operation of the unlocking operation unit that moves the lever in the disengagement direction (see Patent Document 1).

  However, this pressure rice cooker also serves as the drive means for the sealing member as the drive means for the moving member. Therefore, in order to balance the inner pressure of the inner pot with the atmospheric pressure, immediately after releasing the sealing of the inner pot by the sealing member, the lid body is in a state where the inner pressure of the inner pot is higher than the atmospheric pressure. Can be opened. In this case, the user can open the lid immediately after the completion of cooking, immediately after the user stops cooking, or immediately after the cooking is ended (interrupted) due to a power failure. It cannot be said that measures are taken.

  Moreover, in the rice cooker described in patent document 1, the operation of a lock release operation part is made impossible by making the moving member which operates a sealing member approach into the movement area | region of a locking member. Therefore, when the lid is deformed in a state where the inner pot is set to a pressure higher than the atmospheric pressure by the sealing member, the moving member cannot be detached from the state sandwiched between the locking member and the sealing member. In some cases, it may not be possible to release the pressure due to (see Patent Document 2).

  Therefore, in Patent Document 2, the blocking member that enters the movement region of the lock member and prevents the lock member from moving in the disengagement direction is configured by a separate link mechanism. Thereby, even if a cover body deform | transforms with the internal pressure and temperature of an inner pot, it is comprised so that a sealing member can operate | move reliably reliably and can cancel | release pressure.

  However, this patent document 2 does not intentionally deform the lid body in a state where the inner pressure of the inner pot is higher than the atmospheric pressure, but operates the sealing member reliably even if it is deformed. . Therefore, if the lid is not deformed in a state where the sealing by the sealing member is released, there is a problem that the lock member is unlocked and the lid can be opened as in Patent Document 1. . Further, it is impossible to realize a configuration in which the lid body is intentionally deformed when the internal pressure of the inner pan reaches a predetermined pressure and the deformation disappears when the pressure falls below the pressure, without variation among products.

JP 2001-137110 A JP 2007-042423 A

  The present invention has been made in view of conventional problems, and it is an object of the present invention to provide a pressure cooker that can reliably maintain the locked state of the lid even when the pressure is released by the sealing member. .

  In order to solve the above-described problems, a pressure cooker according to the present invention includes a main body having an inner pot that accommodates an object to be heated, a heating unit that is disposed in the main body and heats the inner pot, and opens and closes to the main body. A lid that closes the inner pot, and an engaging claw that is provided on the lid and detachably engages with an engagement receiving portion of the main body. A lock member that is moved in a direction in which the engagement between the engagement receiving portion and the engagement claw portion is released by an operation, an exhaust passage that is provided in the lid body and communicates the inside and outside of the inner pot, By closing the vent hole that constitutes a part of the exhaust passage, the inner pot can be pressurized to a pressure higher than atmospheric pressure, while the inner pot is opened by opening the vent hole. A sealing member capable of being balanced with atmospheric pressure, and the sealing member in a non-energized state with respect to the driving means. Therefore, the moving member moves to the first moving position so as to open the vent hole, and moves to the second moving position so as to close the vent hole by the sealing member in the energized state with respect to the driving means, and the sealing In a pressure cooker provided with a pressurizing means that pressurizes the inner pot sealed by a member to a pressure higher than atmospheric pressure, in conjunction with the movement of the moving member from the first moving position to the second moving position, A lock actuating portion having a displacement member that alternately repeats a protruding state and an immersive state every time the operation is performed, and in a state where the moving member has moved to the first movement position, The movement of the lock member in the disengagement direction by the operation of the lock release operation unit can be prevented.

  In the pressure cooker of the present invention, the movable member is operated from a state where the movable member is located at the first movable position and the movement of the lock member or the unlocking operation unit is not prevented. In this state, when the driving means is energized, the moving member moves to the second moving position, whereby the displacement member of the lock operating portion is changed from one of the protruding state and the immersed state to the other. As a result, the inside of the inner pot can be boosted to a pressure higher than atmospheric pressure by the sealing member, and the lid cannot be opened by the displacement member.

  Next, when the energization to the driving means is interrupted, the moving member moves to the first movement position. At this time, the displacement member of the lock operating portion is not changed between the protruding state and the immersive state. As a result, the blocking of the vent hole by the sealing member is released, and the inner pressure of the inner pot can be balanced with the atmospheric pressure, but the locking member is engaged by the operation of the unlocking operation part due to the protrusion or immersion of the displacement member. Since the movement in the release direction is prevented, the locked state in which the lid cannot be opened is maintained.

  Thereafter, when the drive means is energized again, the moving member moves to the second moving position, whereby the displacement member of the lock operating portion is changed from the projecting state and the immersion state to the other. Next, when the energization to the driving means is interrupted, the moving member moves to the first moving position. As a result, the inside of the inner pan is in a state where it is balanced with the atmospheric pressure, and the lid can be opened by the displacement member.

Specifically, in this pressure cooker, in a state where the moving member has moved to the first moving position, a part of the moving member moves into the moving region of the locking member or the unlocking operation unit to disengage the locking member. A blocking member that is movable from a blocking position that blocks movement in a direction to a non-blocking position that retreats from the movement region of the lock member or the unlocking operation unit and allows the lock member to move in the disengagement direction. It is possible to maintain the movement state of the blocking member to the blocking position by immersing or projecting the displacement member of the lock operating portion, and to move the blocking member to the non-blocking position by protruding or immersing the displacement member. It is preferable that
In this case, the blocking member is rotatably arranged at the front end side in the moving direction from the first moving position to the second moving position of the moving member, and is blocked by the movement of the moving member. And an operating part for operating the displacement member of the lock operating part.
If it does in this way, when the lock release operation part is pressed in the state which made it possible to prevent the movement of the lock member in the disengagement direction, a load is applied to the blocking member. In addition, the locking operation can be performed with high accuracy by providing the blocking member separately from the locking operation unit that needs to operate the protrusion and the immersion state accurately.

Alternatively, the lock actuating portion is disposed at a distal end in the movement direction from the first movement position to the second movement position in the movement member, and the displacement member protrudes in a state where the movement member has moved to the first movement position. By being positioned in a state, a part of the locking member or the unlocking operation portion moves into a moving region to prevent the locking member from moving in the disengagement direction, and the displacement member is positioned in the immersive state. It is preferable to allow the movement of the lock member in the disengagement direction away from the movement region of the lock member or the unlock operation portion.
In this case, it is preferable that a contact portion for operating the displacement member is provided on the lock member.
In this way, there is no need to provide a separate blocking member, so that the cost can be reduced.

  In the pressure cooker of the present invention, there is provided a lock operating unit having a displacement member that interlocks with the movement of the moving member from the first movement position to the second movement position and alternately repeats the protruding state and the immersive state each time the movement member moves. The movement of the lock member that opens the lid body in the disengagement direction is prevented by the protruding state or the immersed state of the displacement member of the lock operating portion. Therefore, the locked state of the lid can be maintained in a state where the energization to the driving means is interrupted in order to balance the internal pressure of the inner pot with the atmospheric pressure. And the lock | rock of a cover body can be cancelled | released by ON / OFF of the electricity supply to the following drive means. Therefore, safety in use can be ensured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a rice cooker that is a pressure cooker according to a first embodiment of the present invention. This rice cooker includes a rice cooker body 11 that detachably houses an inner pot 10 that is electromagnetically heated, and a lid 23 that is rotatably attached to the rice cooker body 11.

  The rice cooker body 11 includes an exterior body including a cylindrical body 12, a bottom body 13 that closes a lower end opening of the body 12, and a shoulder body 14 that is attached to cover the upper end opening of the body 12. ing. This shoulder body 14 is provided with an opening 15 for detachably placing the inner pot 10 at its approximate center, and the closed state of the lid body 23 is maintained on the front side (left side in FIG. 1) of the opening 15. An engagement receiving portion 16 made of a hole is provided. In addition, a cylindrical inner cylinder 17 and a saucer-shaped protective frame 18 made of a non-conductive material are disposed in the opening 15 of the shoulder body 14.

  An induction heating coil 19 as a first heating means is disposed on the lower outer peripheral surface of the protective frame 18 via a ferrite core 20. A cylinder heater 21 as a second heating means is disposed on the outer peripheral portion of the inner cylinder 17. Further, the protective frame 18 is provided with a temperature sensor 22 for the inner pot that is a temperature detection means for detecting the temperature of the inner inner pot 10 through the protective frame 18. In addition, the induction heating coil 19 and the body heater 21, particularly the induction heating coil 19 of the present embodiment are operated by closing the exhaust passage, which will be described later, with the relief valve 77 and sealing the inner pot 10 inside. The water in the pan 10 is boiled, and serves as a pressurizing means for pressurizing the inner pan 10 to a pressure higher than the atmospheric pressure by the steam.

  The lid body 23 is attached to a hinge receiving portion formed on the back portion of the shoulder body 14 so as to be openable and closable, and closes the opening 15 of the rice cooker body 11. The lid body 23 is detachably mounted on an upper plate 24 that constitutes an outer surface material together with the exterior body of the rice cooker body 11, a lower plate 35 that closes the bottom of the upper plate 24, and a lower surface of the lower plate 35. The inner lid 73 is provided. An inside of the lid 23 is provided with an exhaust passage communicating the inside of the inner pot 10 with the outside, and is a sealing means for increasing the pressure in the inner pot 10 to a pressure higher than the atmospheric pressure in the exhaust passage. A relief valve 77 is provided.

  The upper plate 24 is provided with a mounting hole 25 for rotatably mounting an operation member 27 for opening the lid 23 at the front portion thereof. Further, an arrangement recess 26 of the steam port unit 30 is provided on the back of the upper plate 24. The operation member 27 includes a lock release operation portion 28 exposed from the mounting hole 25, and a pressing portion 29 for rotating a lock member 37 described later in the lock release direction is provided on the inner surface thereof. The operation member 27 is biased upward by a kick spring (not shown). The steam port unit 30 includes a tray-like lower case 31, an upper case 32 that is detachably attached to the lower case 31, and a steam port packing 33 that seals between the cases 31 and 32. . And it arrange | positions in the arrangement | positioning recessed part 26 of the upper board 24, and connects the connection part 34 provided in the lower case 31 to the to-be-connected part 47 of the lower board 35 mentioned later so that attachment or detachment is possible.

  As shown in FIGS. 1 and 2, the lower plate 35 has a shape corresponding to the concave depression shape on the upper side of the shoulder body 14. On the back of the lower plate 35, a hinge connection portion 36 is provided that is pivotally attached to the hinge receiving portion of the shoulder body 14 so as to be rotatable about the shaft. A lock member 37 is rotatably attached to the front portion of the lower plate 35.

  The lock member 37 is for maintaining the lid 23 in a closed state with respect to the rice cooker body 11, and is formed by bending a metal plate as shown in FIG. The lock member 37 is provided with shaft portions 38 on both side surfaces for axially attaching to the lower plate 35. Further, on both sides of the lower end edge of the lock member 37, a pair that is detachably engaged with the engagement receiving portion 16 of the shoulder body 14 and is engaged with the flange portion of the inner pot 10 with the resin wall of the shoulder body 14 interposed therebetween. The engaging claw portion 39 is provided in an L shape. Further, the lock member 37 is provided with a receiving portion 40 that extends in an upwardly inclined manner toward the back side at the center of the upper end and contacts the pressing portion 29 of the operation member 27. The lock member 37 is biased to the engagement position shown in FIG. 1 by a kick spring which is a biasing means (not shown). The lock member 37 is moved in a direction in which the engagement between the engagement receiving portion 16 and the engagement claw portion 39 is released when the receiving portion 40 is pressed by the pressing portion 29 by the operation of the lock release operation portion 28. When the operation of the lock release operation unit 28 is released, the lock spring is returned to the lockable state before the rotation by the urging force of the kick spring.

  Further, as shown in FIG. 1, a lid heater 42 as a third heating means is disposed on the bottom of the lower plate 35 via a metal heater cover 41, and serves as a second temperature detecting means. A lid temperature sensor 43 (see FIG. 6) is provided. In addition, the lower plate 35 is provided with a housing portion 44 that houses the relief valve 77 disposed in the inner lid 73 and constitutes the inlet portion of the exhaust passage. The accommodating portion 44 has a dome shape with a lower end opening. A driving opening 45 is provided on the front side, and a packing 46 is disposed in the driving opening 45. Further, a connected portion 47 for detachably connecting the connecting portion 34 of the steam port unit 30 is provided so as to be positioned below the arrangement recess 26.

  The lower plate 35 is provided with a solenoid 48 that is a driving means for the relief valve 77 on the front side of the housing portion 44. The solenoid 48 is a two-position solenoid, and a pressing member 50 that presses the spherical member 82 of the relief valve 77 through the packing 46 is disposed at the tip of a rod 49 that advances and retreats depending on the presence or absence of energization. The solenoid 48 of the present embodiment is moved against the urging force of the spring 51 in the energized state while the rod 49 is moved to the first moving position in which the rod 49 is retracted to the right in FIG. Move to the second movement position that has advanced to the left in 1. As shown in FIG. 2, a slide member 52 made of a rectangular frame is connected to the pressing member 50. When the slide member 52 is energized to the solenoid 48, the rod 49 moves to move from the first movement position to the second movement position via the pressing member 50, while the solenoid 48 is de-energized. The rod 49 moves backward from the second movement position to the first movement position. That is, the rod 49, the pressing member 50, and the slide member 52 constitute a moving member that is operated by the solenoid 48.

  In the lower plate 35 of the present embodiment, a blocking member 53 that constitutes a lock mechanism rotates on the side of the sliding member 52 located at the first movement position in the movement direction from the first movement position to the second movement position. It is arranged to be possible. Further, in the vicinity of the blocking member 53, a lock actuating portion 59 on which a latch mechanism is mounted is disposed to restrict the movement of the blocking member 53.

  The blocking member 53 blocks movement of the lock member 37 in the engagement release direction by the operation of the lock release operation unit 28. Further, when the slide member 52 is moved to the first movement position, the state in which the movement of the lock member 37 in the disengagement direction is prevented by the immersion of the displacement member 61 of the lock operating portion 59 is maintained. Specifically, the blocking member 53 includes a blocking portion 55 that protrudes radially outward from the rotating shaft portion 54. A part of the blocking portion 55 enters the movement region of the receiving portion 40 of the lock member 37 in a state where the slide member 52 has moved to the first movement position, and the movement of the lock member 37 in the disengagement direction is prevented. A non-blocking position (see FIG. 2) allowing the movement of the lock member 37 in the disengagement direction by retreating from the movement region of the receiving portion 40 of the lock member 37 from the blocking position (see FIG. 10B). ). Specifically, the blocking portion 55 includes a protruding portion 56 positioned at the tip and a contact portion 57 positioned on the rotating shaft portion 54 side. The protruding portion 56 is for adjusting a space formed between the locking portion 37 and the receiving portion 40 in a state where the protruding portion 56 has entered the lower side of the receiving portion 40. The abutting portion 57 abuts on the front end frame 52 a of the slide member 52 and obtains a stable pressure by the movement of the slide member 52. Further, the blocking member 53 is provided with an operating portion 58 that protrudes in the radially opposite direction with respect to the blocking portion 55 with the rotating shaft portion 54 interposed therebetween. The space formed between the protruding portion 56 and the receiving portion 40 is an engagement claw of the locking member 37 in a state where the receiving portion 40 is in contact with the protruding portion 56 as the locking member 37 is rotated. The portion 39 and the engagement receiving portion 16 of the shoulder body 14 are set to dimensions that can secure a sufficient engagement allowance that the lid body 23 does not open.

  The lock actuating portion 59 is interlocked with the movement of the slide member 52 from the first movement position to the second movement position via the blocking member 53, and alternately changes between a protruding state and an immersive state by the latch mechanism. A displacement member 61 that repeats is provided. Specifically, as shown in FIG. 4, the lock operating portion 59 includes a displacement member case 60 having an opening at one end. In the displacement member case 60, a displacement member 61 and a spring 62 that is a biasing unit are provided. A guide pin 63 is provided.

  The displacement member 61 is accommodated in a state of being urged in a protruding direction by a spring 62 with respect to the displacement member case 60, and protrudes by the urging force of the spring 62 and the fitting of a guide pin 63 having a substantially concave shape. It is held in the position or immersive position. The displacement member 61 is provided with a mounting hole 61 a for mounting one end of the spring 62. The displacement member 61 is provided with an endless guide groove 64 into which the fitting portion 63a at one end of the guide pin 63 is fitted. The other end of the guide pin 63 serves as a rotation shaft 63b that is rotatably mounted on a mounting portion (not shown) in the displacement member case 60.

  The guide groove 64 has a first groove portion 65 extending in a counterclockwise arc shape from the rear end in the protrusion direction of the displacement member 61 toward the front end in the protrusion direction, and the left side rearward from the front end of the first groove portion 65. A second groove portion 66 extending in the direction from the rear end of the second groove portion 66 to the same left laterally forward direction, and a protruding direction that is the base end of the first groove portion 65 from the distal end of the third groove portion 67 And a fourth groove 68 extending in a counterclockwise arc shape toward the rear end. A first step portion 69 is provided at a boundary portion between the first groove portion 65 and the second groove portion 66 so that the second groove portion 66 is positioned on the lower side. Further, a second step portion 70 is provided at a boundary portion between the second groove portion 66 and the third groove portion 67 so that the third groove portion 67 is positioned on the lower side. Furthermore, a third step portion 71 is provided at a boundary portion between the third groove portion 67 and the fourth groove portion 68 so that the fourth groove portion 68 is positioned on the lower side. A fourth step portion 72 is provided at the boundary portion between the fourth groove portion 68 and the first groove portion 65 so that the first groove portion 65 is positioned on the lower side. By these step portions 69 to 72, the guide pin 63 is configured to be movable in only one direction from the first groove portion 65 to the fourth groove portion 68 through the second groove portion 66 and the third groove portion 67.

  As shown in FIG. 5A, the lock actuating portion 59 configured as described above pushes the displacement member 61 in the immersive direction with the fitting portion 63a of the guide pin 63 located in the proximal end of the first groove portion 65. By (moving), the guide pin 63 moves along the first groove portion 65 and is positioned at the tip of the second groove portion 66 as shown in FIG. When the pressing in the immersion direction is released in this state, the displacing member 61 is moved in the protruding direction by the urging force of the spring 62, and the guide pin 63 has a substantially V-shape as shown in FIG. It is located at the intersection of the second groove 66 and the third groove 67. As a result, the displacement member 61 is kept immersed in the displacement member case 60 with the urging force of the spring 62. In this state, when the displacement member 61 is pressed in the immersion direction, the guide pin 63 moves along the third groove portion 67 and is positioned at the tip of the fourth groove portion 68 as shown in FIG. Then, when the pressing in the immersion direction is released in this state, the displacement member 61 is moved in the protruding direction by the urging force of the spring 62, and the guide pin 63 is connected to the proximal end of the first groove portion 65 as shown in FIG. It is located at (intersection of the first groove part 65 and the fourth groove part 68). Accordingly, the displacement member 61 is maintained in a state of protruding from the displacement member case 60 with the urging force of the spring 62.

  In the present embodiment, as shown in FIG. 2, the lock actuating portion 59 is in a protruding state, the slide member 52 is located at the first movement position, and the blocking member 53 is positioned at the non-blocking position. Thus, the blocking portion 53 of the blocking member 53 is disposed so as to come into contact with the tip. As a result, when the slide member 52 moves from the first movement position toward the second movement position, the displacement member 61 is pressed via the blocking member 53, so that the protruding state and the immersive state are alternated each time the operation is performed. It is configured to repeat.

  On the other hand, the inner lid 73 includes a metal inner lid body 74, a lid packing 75, and a resin frame 76, and is detachably disposed at the lower portion of the heater cover 41. The inner lid 73 is integrally provided with a relief valve 77 disposed in the housing portion 44 of the lower plate 35.

  The inner lid main body 74 serves as a heat radiating plate, and an opening communicating with the inside of the inner pot 10 is provided at a position corresponding to the accommodating portion 44. The lid packing 75 is in close contact with the inner periphery of the opening of the inner pot 10 for sealing. The resin frame 76 is attached to the inner lid body 74 so as not to be detached by being sandwiched between the outer peripheral portions of the inner lid body 74.

  The relief valve 77 includes a valve seat member 78 having a trapezoidal cylindrical shape, a cover 80 covering the valve seat member 78, and a spherical member 82 accommodated therein. The valve seat member 78 includes a vent hole 79 having an open area that can be evacuated so that the inner pot 10 is in a boiling state and the inner pressure of the inner pot 10 is equal to the atmospheric pressure. The cover 80 includes an insertion hole 81 that corresponds to the driving opening 45 of the housing portion 44 and that allows the pressing member 50 of the solenoid 48 to be inserted and retracted through the packing 46. The spherical member 82 is a hermetically sealed member, and the air hole 79 that constitutes a part of the exhaust passage is blocked to prevent the air in the inner pot 10 from being exhausted to the outside. It is possible to pressurize to a higher pressure. Further, the inner pressure of the inner pot 10 is returned to the atmospheric pressure (equilibrium) by being released by the pressing member 50 to release (open) the blockage of the exhaust passage. In this embodiment, when the pressure in the inner pot 10 is increased to 1.30 atm, the spherical member 82 is of a weight that rolls away from the top of the vent hole 79 at that pressure.

  The lid 23 with the inner lid 73 is attached to the inner lid body 74 from the gap between the valve seat member 78 having the vent hole 79, the cover 80 having the insertion hole 81, and the cover 80 and the accommodating portion 44. A gap between the heater cover 41, the inside of the connected portion 47, and the path through the steam port unit 30 constitutes an exhaust passage that communicates the inside of the inner pot 10 and the outside.

  In the rice cooker, an operation panel 83 for the user to input rice cooking conditions and to display the operation state of the rice cooker is disposed on the front upper portion of the shoulder body 14. As shown in FIG. 6, the operation panel 83 includes a liquid crystal display panel 84 as a display means at the center. A numerical segment 85 indicating the reservation time, the remaining time required for cooking rice, and the like is provided in the middle of the liquid crystal display panel 84. In addition, an upper portion of the numerical segment 85 is provided with a non-washed rice segment 86 that indicates whether or not the non-washed rice is selected, and the numerical segment 85 is displayed next to the remaining time (minutes) required for cooking rice. ), An at-segment 87 is provided. In addition, a reservation segment 88 is provided at the lower part of the numerical value segment 85. The reservation segment 88 indicates the two types of reserved rice cooking with the characters “reservation”, “1”, and “2”. Further, a pressure segment 89 that is a pressure display portion that indicates in a letter a pressure state that the inside of the inner pot 10 is pressurized and the internal pressure is higher than a preset reference pressure is provided next to the reserved segment 88. Further, a minute segment 90 is provided beside the pressure segment 89 and indicates the unit of time required for cooking the numerical value segment 85 to be cooked. A plurality of mark segments 91 having a triangular shape are provided around the liquid crystal display panel 84 in order to indicate a selection state of the rice cooking menu.

  In addition, the operation panel 83 includes a plurality of rice cooking menus such as “normal”, “mochimochi”, “shakuri” of white rice, and others, so as to be positioned next to the mark segment 91 around the liquid crystal display panel 84. "Mature cooked", "Rapid rice rapid", "Cooked rice", "Sushimeshi", "Okayu", "Okowa", "Brown rice", "Brown rice activity" is provided. Further, in order to display the selection state of the two types of heat insulation temperatures, a heat insulation display section 93 indicated by the characters “standard” and “high” is provided on the lower side of the liquid crystal display panel 84 and corresponds to each. LED 94 is provided.

  Further, the operation panel 83 includes a plurality of switches 95a to 95h that are input means. On the right side of the liquid crystal display board are a rice cooking switch 95a which is a rice cooking process execution switch, a reservation switch 95b which is a reservation rice selection switch, an up switch 95c and a down switch 95d for changing the current time, rice cooking time and the like. And are provided. In addition, on the left side of the liquid crystal display panel 84, there is a barge switch 95e for canceling (stopping) the rice cooking and heat retaining treatment and the selection state, a menu switch 95f for selecting the rice cooking menu, and whether or not the rice is washed. A non-washing rice switch 95g for selecting the temperature and a heat retention selection switch 95h for selecting a heat retention process mode as well as a heat retention process execution switch.

  In the pressure rice cooker configured in this way, a control board (not shown) is disposed between the body 12 of the exterior body and the protective frame 18, and the microcomputer 96 serving as control means mounted on the control board is used in advance. Rice cooking and heat insulation processing are executed according to the set program.

  Specifically, the microcomputer 96 includes a voltage determination unit 96a at the power supply port. A commercial power supply 97 is connected to a power supply line connected to the power supply port via a power cord and a power circuit (not shown), and a primary battery 98 as a backup power supply is connected. The commercial power supply 97 outputs 5V drive power to the microcomputer 96 via the power supply circuit, the induction heating coil 19, the heaters 21 and 42, the solenoid 48 as the drive means, and the sensor as the detection means. Driving power is supplied to 22, 43 and the like. The primary battery 98 supplies 3V drive power to the microcomputer 96 in a state where power from the commercial power source 97 is cut off. Then, the microcomputer 96 can recognize whether the driving power is 5V or 3V by the voltage determination unit 96a, so that the operation is based on the power from the commercial power source 97 or the power from the primary battery 98.

  The microcomputer 96 is connected to a ROM 99 which is a nonvolatile storage means. The ROM 99 is capable of retaining (not erasing) stored information even when the power from the commercial power source 97 is cut off. The ROM 99 includes a plurality of execution programs including the rice cooking and heat retaining processes, and setting data (data) used in each execution program. Table) and arithmetic expressions are stored. The execution programs are roughly classified into those executed in the power supply state from the commercial power source 97 (normal mode) and those executed in the power supply state from the primary battery 98 (backup mode). In the normal mode, the execution program of the original pressure rice cooker such as the rice cooking and the heat retaining process is executed. In the backup mode, the voltage discriminating unit 96a, a timer which is a timekeeping means for measuring time (time), the display of the liquid crystal display panel 84, and unlocking by temporarily energizing the solenoid 48, etc. Only the backup program is executed.

  In the present embodiment, when the operation of the rice cooking switch 95a is detected in the normal mode, preheating, medium cooking, boiling maintenance, and according to the rice cooking program stored in the ROM 99 based on the rice cooking conditions set by the liquid crystal display panel 84, and After performing the rice cooking process which consists of each process of the potty including twice cooking, the heat retention process which heats the cooked rice to predetermined temperature is performed continuously. In the rice cooking process, energization of the solenoid 48 is started at the same time as the start of the inside-puffing process, the inside of the inner pot 10 can be boosted to a pressure higher than atmospheric pressure, and the lid 23 cannot be opened. Locked. Moreover, based on the rising gradient of the temperature detected by the temperature sensor 22 for the inner pot, the rice cooking capacity at that time is determined. Further, in the unevenness process, the energization to the solenoid 48 is cut off, the release of the pressure into the inner pot 10 is released, and then the energization is performed again to the solenoid 48, whereby the lid 23 can be opened. And

  On the other hand, in the backup mode, the elapsed time is measured by a timer, and the current time is displayed on the liquid crystal display panel 84. In addition, during the execution of the rice cooking process in the normal mode, when the power from the commercial power source 97 is interrupted and the mode is changed to the backup mode, the rice cooking process is interrupted. And if this power failure time is measured and electric power returns in less than 10 minutes, a rice cooking process will be performed continuously, but if 10 minutes or more pass, a rice cooking process will be stopped even if electric power returns.

  In the backup mode, when the rice cooking process is being performed before the power failure, the inner pot 10 is opened so that the pressure in the inner pot 10 is balanced with the atmospheric pressure, and after a predetermined waiting time has elapsed, A pressure release process for changing the display of the pressure segment 89 is performed while the lid 23 is brought into an unlocked state in which the lid 23 can be opened. Here, this waiting time is a time until the inner pot 10 is lowered to a reference pressure (for example, 1.05 atm) that does not cause any inconvenience even when the lid 23 is opened. Specifically, pressure and temperature have a correlation with each other. Therefore, in this embodiment, the pressure is converted into temperature, and the temperature detected in the inner pan 10 by the lid temperature sensor 43 when the pressure is released, and the calculation formula based on the preset temperature decrease gradient, The time to decrease to the temperature corresponding to the reference pressure is set (estimated), and after the time has elapsed, the lock by the blocking member 53 is released and the display of the pressure segment 89 is changed.

  Next, the control by the microcomputer 96 will be specifically described.

  First, in a state in which the user has purchased a pressure rice cooker, the microcomputer 96 is operating in the backup mode with power from the primary battery 98.

  In this state, as shown in FIG. 7, the microcomputer 96 first detects whether or not it is connected to a commercial power source in step S1 using the voltage determination unit 96a. If the connection to the commercial power source 97 is not detected, the process proceeds to step S2, a power failure process (backup mode) described in detail later is executed, and the process returns to step S1. If connection to the commercial power source 97 is detected, the process proceeds to step S3.

  In step S3, a power failure recovery process based on the state before the power failure and the state at the time of power failure recovery is executed, and the process proceeds to step S4. Specifically, in this power failure recovery process, if the state before the power failure was during the rice cooking process and the power failure time was less than 10 minutes, continue the rice cooking process from the state before the power failure. Execute. Moreover, in the state other than that before a power failure, it is set as the standby state (state of step S4) which is not performing both the rice cooking process including reservation rice cooking, and a heat retention process.

  In step S4, it is detected whether any of the switches 95a to 95h is operated. When the operation of any of the switches 95a to 95h is detected, the process proceeds to step S5, the switch reception process corresponding to the detected switches 95a to 95h is executed, and the process returns to step S1. If no operation of any of the switches 95a to 95h is detected, the process directly returns to step S1.

  And when operation of the rice cooking switch 95a is detected, the rice cooking process shown in FIG. 8 is performed. Note that the reserved rice cooking is determined by operating the rice cooking switch 95a after detecting the operation of the reservation switch 95b. And the difference with the following rice cooking process differs only in the point which waits until it becomes the rice cooking start time which divided the rice cooking time from the rice cooking start time or the cooking time. In addition, the processes from step S1 to step S5 are always performed in parallel even during execution of the rice cooking process and the heat insulation process described below.

  In the rice cooking process, as shown in FIG. 8, first, the microcomputer 96 inputs 1 to a flag fa which means that the rice cooking process is being executed in step S <b> 10.

  Thereafter, in step S11, energization of the induction heating coil 19 is started, and a preheating step is performed in which the temperature is adjusted so that the temperature of the inner pot 10 is about 50 ° C. and heated.

  And when a pre-heating process is complete | finished when preset time passes, it will be in the state which can pressurize the inside pot 10 by starting energization to the solenoid 48 and turning on the relief valve 77 by step S12. To do. Thereafter, after the pressure segment 89 is turned on in step S13, 1 is input to the flag fb indicating that the pressure is applied in step S14, and the process proceeds to steps S15 and S16.

  In steps S15 and S16, the temperature raising step and the capacity determination step are performed in parallel. In the temperature raising step in step S15, the induction heating coil 19 is energized with 100% (full power) to boil water containing cooked rice in the inner pot 10. Moreover, the capacity | capacitance discrimination | determination process of step S16 discriminate | determines the rice cooking capacity accommodated in the inner pot 10 with the rising gradient of the temperature of the inner pot 10 during heating, and memorize | stores the determined rice cooking capacity. Note that the pressure injection start in step S12 and the temperature raising step in step S15 are executed substantially simultaneously.

  When the temperature raising step is completed, the boiling maintaining step is executed by controlling the induction heating coil 19 based on the input value of the lid temperature sensor 43 in step S17. When the boiling maintenance process is completed by elapse of a preset time, in step S18, the energization amount for the induction heating coil 19 is increased and the cooking process is executed.

  If the dry-up in the inner pot 10 is detected based on the detected temperature in the cooking process, the uneven process in step S19 and the first pressure release process in step S20 are processed in parallel. In the unevenness process, energization of the body heater 21 and the lid heater 42 is started, while the energization of the induction heating coil 19 is interrupted. The first pressure release process is for releasing the pressure applied by the relief valve 77 and then releasing the lock of the lid 23 and turning off the display of the pressure segment 89, which will be described in detail later.

  When the unevenness process is finished by elapse of a preset time, in step S21, 0 is input to fa so as to mean that the rice cooking process is finished, the rice cooking process is finished, and then the heat retaining process. Migrate to

  Next, the first pressure release process in step S20 will be described. The first pressure release process is performed when operating with power from the commercial power source 97 (normal mode).

  In this first pressure release process, as shown in FIG. 9, the microcomputer 96 first cuts off the energization to the solenoid 48 and turns off the relief valve 77 in step S20-1, and then proceeds to step S20-2. Thus, the temperature in the inner pot 10 is detected by the lid temperature sensor 43. In step S20-3, it is determined whether or not the detected temperature T is lower than a reference temperature T0 corresponding to the reference pressure P0 stored in the ROM 99 in advance. If T ≧ T0, the process proceeds to step S20-4, and the detection count n is set to 0, and the process returns to step S20-2. On the other hand, if T <T0, the process proceeds to step S20-5, 1 is added to the number of detections n, and the process proceeds to step S20-6.

  In step S20-6, it is detected whether or not the number of detections n is 3. If n = 3, the process proceeds to step S20-7. If n = 3, the process returns to step S20-2. That is, in this embodiment, when T <T0 is detected three times in succession, the process proceeds to step S20-7.

  In step S20-7, energization of the solenoid 48 is started and the relief valve 77 is turned on. Then, in step S20-8, the process waits until the 1-second timer counts up. When the 1-second timer counts up, in step S20-9, the solenoid 48 is de-energized and the relief valve 77 is turned off. In step S20-10, the pressure segment 89 is turned off. Thereafter, in step S20-11, 0 is input to the flag fb so as to mean that the pressure in the inner pot 10 is lower than the reference pressure, and the process returns.

  Next, the operation | movement by the on / off of electricity supply to the solenoid 48 of step S12, step S20-1, step S20-7, and step S20-9 is demonstrated concretely.

  First, in the state before starting energization of the solenoid 48 in step S12, as shown in FIG. 2, the rod 49 is retracted by the urging force of the spring 51, and the slide member 52 is also positioned at the first movement position. . Further, in the lock operating portion 59, the displacement member 61 is in a protruding state and the operating portion 58 of the blocking member 53 is pressed, so that the blocking portion 55 at the tip of the blocking member 53 is separated from the receiving portion 40 of the locking member 37. Located in the non-blocking position.

  In this state, energization of the solenoid 48 is started in step S12, whereby the slide member 52 moves to the second movement position via the rod 49 and the pressing member 50. As a result, the blocking member 53 with which the contact portion 57 contacts is pressed and rotated to the blocking position as shown in FIG. Further, due to the rotation of the blocking member 53, the displacement member 61 of the lock operating portion 59 is pressed into the displacement member case 60, and is brought into an immersion state (see FIG. 5B).

  In this state, the protrusion 56 at the tip of the blocking portion 55 of the blocking member 53 is positioned below the movement region of the receiving portion 40 of the lock member 37. Therefore, even if the user operates the lock release operation part 28 of the operation member 27 and presses the receiving part 40 with the pressing part 29, the lock member 37 cannot be rotated in the disengagement direction. In this state, the pressing member 50 that is a moving member moves to the second moving position, releases the pressing of the spherical member 82, and closes the vent hole 79. Therefore, the inside of the inner pot 10 can be boosted to a pressure higher than the atmospheric pressure with heating by the induction heating coil 19.

  In this locked state, the cooking process in step S18 is completed, and when the energization of the solenoid 48 is interrupted in step S20-1, the slide is performed via the rod 49 and the pressing member 50 as shown in FIG. The member 52 moves to the first movement position. As a result, the pressure on the displacement member 61 via the blocking member 53 by the slide member 52 is released. In this state, the displacement member 61 has a lock pin connected to the second groove 66 as shown in FIG. By being located at the intersection of the third groove portion 67 and the third groove portion 67, the immersion state is maintained.

  As a result, the blocking portion 55 of the blocking member 53 maintains the state of entering the rotation region of the receiving portion 40 of the lock member 37. Therefore, the lid body 23 maintains a locked state that cannot be opened even when the operation member 27 is operated. However, in this state, the pressing member 50 that is a moving member moves to the first moving position, and the spherical member 82 is pressed and separated from the vent hole 79. Therefore, since the inside of the inner pot 10 and the atmosphere communicate with each other, the inner pressure of the inner pot 10 can be quickly balanced with the atmospheric pressure.

  And when energization is started to solenoid 48 at Step S20-7 by waiting time until the inside pan 10 pressure-lowers, similarly to the above, slide member 52 goes through rod 49 and pressing member 50. Move to the second movement position. As a result, the slide member 52 contacts and presses against the contact portion 57 of the blocking member 53, thereby moving the displacement member 61 in the immersion direction via the blocking member 53 (see FIG. 5D).

  Thereafter, in step S20-9, when the energization to the solenoid 48 is interrupted, the slide member 52 moves to the first movement position via the rod 49 and the pressing member 50 as shown in FIG. Thereby, the pressing of the displacement member 61 via the blocking member 53 by the slide member 52 is released. As a result, the displacement member 61 enters a protruding state by the urging force of the spring 62. Thereby, the operation part 58 of the blocking member 53 is pressed, and the blocking member 53 is rotated from the blocking position to the non-blocking position.

  As a result, the blocking portion 55 of the blocking member 53 is separated from the rotation region of the receiving portion 40 of the lock member 37. Therefore, the lid 23 is in an unlocked state in which the lock member 37 can be rotated and opened by operating the operation member 27. Further, the spherical member 82 of the relief valve 77 is pressed by the pressing member 50 and is separated from the air hole 79.

  Thus, the rice cooker of this embodiment is disengaged by the lock member 37 from the blocking position that prevents the lock member 37 from moving in the disengagement direction while the slide member 52 is positioned at the first movement position. A blocking member 53 that is movable to a non-blocking position that permits movement in a direction, and a lock actuating unit 59 that maintains the blocking position of the blocking member 53 by the immersing state of the displacement member 61 and moves to the non-blocking position by the protruding state. ing. Therefore, the locking of the lock member 37 by the blocking member 53 can be maintained in a state where the energization of the solenoid 48 is interrupted in order to balance the internal pressure of the inner pot 10 with the atmospheric pressure. Further, the lock of the lid 23 by the lock member 37 can be released by turning on / off the energization of the next solenoid 48. Therefore, it is possible to quickly equilibrate with the atmospheric pressure while maintaining the locked state in which the lid 23 cannot be opened when the inner pot 10 is higher than the atmospheric pressure. And it can be made the state which can open | close the cover body 23 by operating the solenoid 48 again in the state which the inside of the inner pot 10 was balanced with atmospheric pressure. Therefore, safety in use can be ensured.

  In a state where the blocking member 53 prevents the lock member 37 from moving in the disengagement direction, a load is applied to the blocking member 53 when the lock release operation unit 28 is pressed. Further, since the blocking member 53 is provided separately from the lock actuating portion 59 that needs to accurately operate the protruding and immersive states, the locking operation can be performed with high accuracy. In addition, since the distance from the fulcrum to the lock operating part 59 is smaller than the distance from the fulcrum (rotating shaft part 54) to the blocking part 55, the spring 62 of the lock operating part 59 gives the spring 51 of the solenoid 48. The impact is small. Therefore, adverse effects on the operation of the slide member 52 can be prevented.

  Next, the power failure process (backup mode) in step S2 will be described. The power failure process is performed with the power of the primary battery 98 when the power from the commercial power source 97 is interrupted and the remaining capacity of the primary battery 98 satisfies the reference value. The interruption of the electric power from the commercial power source 97 may be due to a general power failure due to a natural disaster or the like and an artificial action by the user pulling out the power cord.

  In this power failure process, as shown in FIG. 11, first, the microcomputer 96 executes a time counting process in which the elapsed time is measured by a timer and the current time of the liquid crystal display panel 84 is updated in step S30.

  Next, in step S31, whether or not a power failure has occurred during the rice cooking process is detected based on whether or not 1 is input to fa. If fa is 1, i.e., if a power failure occurs during the rice cooking process, the process proceeds to step S <b> 32, and if fa is 0, i.e., if the rice cooking process is not executed at the time of a power failure, the process returns. .

  In step S33, the rice cooking process at the time of a power failure, that is, the stage where the rice cooking process is completed is stored in the ROM 99. Thereafter, in step S34, the power failure time measurement timer is reset and started, and then in step S35, 1 is input to fc in order to store that the power failure time is being measured, and the process proceeds to step S36.

  In step S36, it is detected whether or not 1 is input to fb as to whether or not the inside of the inner pot 10 can be increased to a pressure higher than the atmospheric pressure before the power failure. If fb is 1 (pressure input state), the process proceeds to step S37 to execute the second pressure release process and return. On the other hand, when fb is 0 (non-pressure input state), the process returns as it is.

  Next, the second pressure release process in step S37 will be described. Note that the second pressure release process is performed when operating with power from the primary battery 98 (backup mode).

  In the second pressure release process, as shown in FIG. 12, the microcomputer 96 first sets a time for releasing the lock of the lid 23 and measures the set time in step S37-1. It is detected whether or not a flag fd meaning “0” is zero. If fd is 0 (not measuring), the process proceeds to step S37-2, and if fd is 1 (measuring), the process proceeds to step S37-8.

  In step S37-2, the energization of the solenoid 48 is interrupted and the relief valve 77 is turned off. Then, in step S37-3, the pressure segment 89 is blinked. Thereafter, in step S37-4, the rice cooking capacity determined during the rice cooking process and the temperature detected immediately before the power failure are read from the ROM 99, and in step S37-5, the detected temperature and the temperature drop corresponding to the rice cooking capacity are detected. Based on the calculation formula of the gradient, the lock release time, that is, the time until the inside of the inner pot 10 falls below the reference temperature (pressure) is calculated (estimated) and set. Next, in step S37-6, a measurement timer for measuring the passage of the set time is started, and in step S37-7, 1 is input to fd and the state where the set time is being measured is stored.

  Next, in step S37-8, it is detected whether or not the display time measurement timer being measured has been counted up (elapsed). If the count is up, the process proceeds to step S37-9. If the count is not up, the process returns.

  In step S37-9, energization of the solenoid 48 is started and the relief valve 77 is turned on. Then, in step S37-10, the process waits until the 1-second timer counts up. When the 1-second timer counts up, in step S37-11, the solenoid 48 is de-energized to turn off the relief valve 77, and in step S37-12, the pressure segment 89 is turned off. Thereafter, in step S37-13, 0 is input to fb and 0 is input to fd, and the process returns.

  Thus, in this embodiment, at the time of a power failure in which the temperature corresponding to the internal pressure of the inner pot 10 cannot be detected by the lid temperature sensor 43, the temperature detected immediately before the power failure and the preset temperature decrease gradient corresponding to the pressure are applied. Based on this, the time until the internal pressure of the inner pot 10 becomes lower than the reference pressure is set. Then, until this set time has elapsed, in step S37-2 similar to step S20-1, the energization of the solenoid is interrupted to quickly equilibrate the inner pot 10 with atmospheric pressure, while the lid 23 The locked state is maintained. Moreover, if the internal pressure of the inner pot 10 falls to a safe pressure, the lock | rock of the cover body 23 will be cancelled | released by operating the solenoid 48 again by step S37-9, 11 similar to step S20-7,9. Therefore, the inside of the inner pot 10 can be quickly reduced to a safe pressure while ensuring the safety of the user. Moreover, the set time for unlocking the lid 23 is configured to change based on the rice cooking capacity determined at the time of rice cooking. Therefore, unnecessary waiting time is not included.

  FIG.13 and FIG.14 (A), (B) shows the rice cooker of 2nd Embodiment. In the second embodiment, the actuating portion 58 of the blocking member 53 is constituted by the root portion of the rotating shaft portion 54 in the blocking portion 55, and the blocking member 53 is brought into the non-blocking position by the urging force of the displacement member 61 in the protruding state. This is largely different from the first embodiment in that the lock actuating portion 59 is disposed on the lock member 37 side so as to be moved.

  In the second embodiment configured as described above, when energization is started to the solenoid 48 in order to put pressure into the inner pot 10 and the slide member 52 is moved to the second movement position, the same as in the first embodiment. The blocking member 53 is rotated clockwise by the slide member 52. As a result, as shown in FIG. 14A, the displacement member 61 maintains the immersive state by pressing the displacement member 61 of the lock operating portion 59 in the immersive direction by the blocking member 53.

  Then, when the energization of the solenoid 48 is interrupted to balance the pressure in the inner pot 10 with the atmospheric pressure, the slide member 52 moves to the first movement position as shown in FIG. However, since the displacement member 61 of the lock operating portion 59 is in an immersive state, the blocking member 53 maintains a blocking position at which the rotation of the locking member 37 is blocked.

  Next, when energization of the solenoid 48 is started, the slide member 52 moves to the second movement position, thereby pressing the displacement member 61 of the lock operating portion 59 via the blocking member 53. As a result, the displacement member 61 can be protruded by the biasing force of the spring 62. In this state, the energization of the solenoid 48 is interrupted and the slide member 52 is moved to the first movement position, whereby the blocking member 53 is rotated to the non-blocking position by the protrusion of the displacement member 61 as shown in FIG. Moved.

  Therefore, the rice cooker of 2nd Embodiment comprised in this way is spherical with the internal pressure of the inner pot 10 higher than atmospheric pressure, maintaining the locked state of the cover body 23 similarly to 1st Embodiment. The member 82 can be separated from the air hole 79 and can be balanced with the atmospheric pressure.

  FIGS. 15A to 17B show a rice cooker according to the third embodiment. In the third embodiment, as in the second embodiment, the operating portion 58 of the blocking member 53 is configured by the root portion of the rotating shaft portion 54 in the blocking portion 55, while the lock operating portion 59 is the same as that of the first embodiment. Similarly, it is different from the first embodiment in that it is arranged on the back side of the blocking member 53.

  Specifically, the lock operating portion 59 of the third embodiment is configured to urge the displacement member 61 in the immersion direction by a spring 62. Further, the guide groove 64 of the displacement member 61 is rotated 180 degrees with respect to the first embodiment, and the first groove portion 65 is configured to extend from the front end in the protruding direction toward the rear end.

  Further, the displacement member 61 of the present embodiment is provided with a connecting portion 100 for connecting to the blocking member 53. Further, the operating portion 58 of the blocking member 53 is provided with a connected portion 101 having a long groove (not shown) for connecting the connecting portion 100 so as to be rotatable and slidable.

  In the third embodiment configured as described above, when energization of the solenoid 48 is started in order to put pressure into the inner pot 10 and the slide member 52 is moved to the second movement position, the state shown in FIG. Thus, the blocking member 53 is rotated clockwise by the slide member 52. Accordingly, the displacement member 61 is maintained in the protruding state by being pulled in the protruding direction by the blocking member 53 by the blocking member 53 (see FIG. 16B).

  Then, when the energization to the solenoid 48 is interrupted in order to balance the pressure in the inner pot 10 with the atmospheric pressure, the slide member 52 moves to the first movement position as shown in FIG. However, since the displacement member 61 of the lock operating portion 59 maintains the protruding state (see FIG. 16C), the blocking member 53 maintains a blocking position that blocks the rotation of the lock member 37.

  Next, when energization of the solenoid 48 is started, the slide member 52 moves to the second movement position, thereby pulling the displacement member 61 of the lock operating portion 59 via the blocking member 53. As a result, the displacement member 61 becomes immersible by the urging force of the spring 62 (see FIG. 16D). In this state, the energization of the solenoid 48 is cut off, and the slide member 52 is moved to the first movement position, so that the blocking member 53 is rotated to the non-blocking position by the immersion of the displacement member 61 as shown in FIG. Moved.

  Therefore, the rice cooker of 3rd Embodiment comprised in this way is spherical with the internal pressure of the inner pot 10 higher than atmospheric pressure, maintaining the locked state of the cover body 23 similarly to 1st Embodiment. The member 82 can be separated from the air hole 79 and can be balanced with the atmospheric pressure. In addition, since the connection part 100 and the to-be-connected part 101 of this 3rd Embodiment can maintain the state which moved the blocking member 53 to the blocking position or the non-blocking position reliably, it is provided also in 1st and 2nd embodiment. Is preferred.

  FIGS. 18 to 20A and 20B show a rice cooker of the fourth embodiment. The fourth embodiment is greatly different from the above embodiments in that the blocking member 53 is not provided. Specifically, the displacement member 61 of the lock operating portion 59 is configured to protrude by the urging force of the spring 62 as in the first embodiment.

  In the fourth embodiment, the lock operating portion 59 is disposed on the frame 52a at the tip of the slide member 52 in the moving direction from the first moving position to the second moving position. The displacement member 61 is in the protruding state with the slide member 52 positioned at the first movement position, so that part of the displacement member 61 enters the rotation region of the receiving portion 40 of the lock member 37 and is in the immersed state. By doing so, it is configured to move away from the rotation region of the receiving portion 40. In the fourth embodiment, a housing portion that houses the displacement member 61 may be provided in the distal end frame 52 a of the slide member 52 without providing the dedicated displacement member case 60.

  Further, as shown in FIG. 19, the lock member 37 of the present embodiment is provided with a contact portion 102 that operates the displacement member 61 so as to hang downward by being cut and raised in the receiving portion 40. However, it is preferable that the position where the contact portion 102 is formed be positioned in the vicinity of the shaft portion 38 because a rotational force against the lock member 37 is not applied at the time of contact.

  In 4th Embodiment comprised in this way, when electricity will be started to the solenoid 48 in order to inject | pour a pressure in the inner pot 10, and the slide member 52 will be moved to a 2nd movement position, it will show to FIG. 20 (A). As described above, when the displacement member 61 of the lock operating portion 59 comes into contact with the contact portion 102, the displacement member 61 can project (see FIG. 5D).

  Then, when the energization to the solenoid 48 is interrupted to balance the pressure in the inner pot 10 with the atmospheric pressure, the slide member 52 moves to the first movement position as shown in FIG. However, since the displacement member 61 of the lock operating portion 59 is in the protruding state (see FIG. 5A), the state where the displacement member 61 enters the lower side, which is the rotation region of the receiving portion 40, is maintained. As a result, even if the lock release operation portion 28 of the operation member 27 is operated, the lock member 37 can be prevented from rotating in the engagement release direction.

  Next, when energization of the solenoid 48 is started, the slide member 52 moves to the second movement position, whereby the displacement member 61 of the lock operating portion 59 is pressed again (see FIG. 5B). In this state, the energization of the solenoid 48 is interrupted, and the slide member 52 is moved to the first movement position, so that the displacement member 61 maintained in the immersed state is rotated by the receiving portion 40 as shown in FIG. The lock member 37 is moved away from the moving region in the disengagement direction.

  Therefore, the rice cooker of 4th Embodiment comprised in this way is spherical with the internal pressure of the inner pot 10 higher than atmospheric pressure, maintaining the locked state of the cover body 23 similarly to 1st Embodiment. The member 82 can be separated from the air hole 79 and can be balanced with the atmospheric pressure. Further, since the blocking member 53 shown in the first to third embodiments is unnecessary, the number of parts can be reduced and the cost can be reduced.

  In addition, the pressure cooker of this invention is not limited to the structure of the said embodiment, A various change is possible.

  In the above-described embodiment, the locking member 37 is prevented or allowed to rotate by the protruding state or the immersed state of the displacement member 61. However, the protruding portion 56 of the blocking member 53 or a part of the displacement member 61 is unlocked. It is good also as a structure which is located in the lower part of the operation part 28, and prevents or accept | permits operation of the operation member 27 itself.

It is sectional drawing which shows the rice cooker which is a pressure cooker of 1st Embodiment which concerns on this invention. It is a top view which shows the lower board of 1st Embodiment which comprises a cover body. It is a perspective view which shows the structure of a locking member. It is a disassembled perspective view which shows the structure of a lock | rock action | operation part. (A), (B), (C), (D) is a top view which shows operation | movement of a lock | rock action | operation part. It is a block diagram which shows the structure of the rice cooker containing an operation panel. It is a flowchart which shows the control by a microcomputer. It is a flowchart which shows the rice cooking process by a microcomputer. It is a flowchart which shows the 1st pressure cancellation | release process of FIG. (A), (B) is a top view which shows the action | operation by the energization and interruption | blocking to a drive means. It is a flowchart which shows the power failure process of FIG. It is a flowchart which shows the 2nd pressure cancellation | release process of FIG. It is a top view which shows the lower board of 2nd Embodiment. (A), (B) is a top view which shows the action | operation by the electricity supply to the drive means of 2nd Embodiment, and interruption | blocking. It is a top view which shows the lower board of 3rd Embodiment. (A), (B), (C), (D) is a top view which shows operation | movement of the lock | rock action | operation part of 3rd Embodiment. (A), (B) is a top view which shows the action | operation by the electricity supply and interruption | blocking to the drive means of 3rd Embodiment. It is a top view which shows the lower board of 4th Embodiment. It is a perspective view which shows the structure of the locking member of 4th Embodiment. (A), (B) is a top view which shows the action | operation by the electricity supply to the drive means of 4th Embodiment, and interruption | blocking.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inner pan 11 ... Rice cooker main body 19 ... Induction heating coil (heating means and pressurizing means)
DESCRIPTION OF SYMBOLS 23 ... Lid 27 ... Operation member 28 ... Lock release operation part 37 ... Lock member 39 ... Engagement claw part 40 ... Reception part 48 ... Solenoid (drive means)
49 ... Rod 50 ... Pressing member (moving member)
52 ... Slide member (moving member)
53 ... Blocking member 55 ... Blocking portion 58 ... Actuating portion 59 ... Locking operating portion 60 ... Displacement member case 61 ... Displacement member 62 ... Spring 63 ... Guide pin 64 ... Guide groove 65 ... First groove portion 66 ... Second groove portion 67 ... First 3 groove part 68 ... 4th groove part 73 ... Inner lid 77 ... Relief valve 79 ... Ventilation hole 82 ... Spherical member (sealing member)
96 ... Microcomputer (control means)

Claims (6)

A main body having an inner pot for accommodating an object to be heated;
A heating means disposed in the main body for heating the inner pot;
A lid that is attached to the main body so as to be openable and closable, and closes the inner pot;
An engagement claw portion provided on the lid body and detachably engaged with the engagement reception portion of the main body is provided, and the engagement reception portion and the engagement claw portion are engaged with each other by an operation of a lock release operation portion. A locking member that is moved in the direction in which the connection is released;
An exhaust passage which is provided in the lid and communicates the inside and outside of the inner pot;
By closing the vent hole that constitutes a part of the exhaust passage, the inner pot can be pressurized to a pressure higher than atmospheric pressure, while the inner pot is opened by opening the vent hole. A sealing member capable of being balanced with atmospheric pressure;
In a non-energized state with respect to the driving means, the sealing member moves to the first moving position so as to open the vent hole, and in the energized state with respect to the driving means, the second hole so as to close the vent hole with the sealing member. A moving member that moves to a moving position;
In a pressure cooker provided with a pressurizing means for pressurizing the inside pot sealed by the sealing member to a pressure higher than atmospheric pressure,
In conjunction with the movement of the moving member from the first moving position to the second moving position, a lock actuating portion having a displacement member that alternately repeats the protruding state and the immersive state for each operation is provided,
With the movement member moved to the first movement position, the movement of the lock member in the disengagement direction by the operation of the lock release operation part can be prevented by the protrusion or the immersion of the displacement member of the lock operation part. A pressure cooker characterized by that. In a state where the moving member is moved to the first moving position, from a blocking position where a part enters the moving region of the lock member or the unlocking operation portion and prevents the lock member from moving in the disengagement direction, A blocking member that is movable back to a non-blocking position that allows the locking member or the unlocking operation unit to move backward from the moving region and allows the locking member to move in the disengagement direction;
The movement state of the blocking member to the blocking position is maintained by the immersion or protrusion of the displacement member of the lock operating portion, and the blocking member can be moved to the non-blocking position by the protrusion or immersion of the displacement member. The pressure cooker of Claim 1 characterized by the above-mentioned.   The blocking member is rotatably disposed at a distal end side in the movement direction from the first movement position to the second movement position of the moving member, and the blocking portion pressed by the movement of the moving member; The pressure cooker according to claim 2, further comprising an operation unit that operates a displacement member of the lock operation unit. The lock actuating portion is disposed at a distal end in the movement direction from the first movement position to the second movement position in the moving member,
When the moving member is moved to the first moving position, when the displacement member is in the protruding state, a part of the moving member moves into the moving region of the locking member or the unlocking operation portion to release the engagement of the locking member. The movement of the lock member is allowed to move away from the moving region of the lock member or the unlocking operation portion by preventing the movement in the direction and the displacement member is located in the immersion state. The pressure cooker according to claim 1, wherein   The pressure cooker according to claim 4, wherein the lock member is provided with a contact portion that operates the displacement member. The lock actuating portion includes an urging means for urging the displacement member in a protruding direction or an immersion direction, an endless guide groove provided in the displacement member, and a guide pin fitted in the guide groove. With
The guide groove is
A first groove extending from the rear end or front end of the displacement member toward the front end or rear end in the protrusion direction;
A second groove extending laterally backward or forward from the front or rear end of the first groove,
A third groove portion extending from the rear end or the front end of the second groove portion in the same laterally forward or backward direction;
A fourth groove portion extending from the front end or rear end of the third groove portion to the rear end or front end in the protruding direction, which is the base end of the first groove portion,
The guide pin can be moved only in one direction from the first groove part to the fourth groove part through the second and third groove parts, and the guide pin is located at the intersection of the first groove part and the fourth groove part so as to protrude. Alternatively, the immersion state is maintained, and the guide pin is positioned at the intersection of the second groove portion and the third groove portion to maintain the immersion state or the protruding state. The pressure cooker according to item 1.

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