JP5243333B2 - Household appliances - Google Patents

Description

  The present invention relates to an electric appliance for home use in which a lid is disposed on a main body so as to be opened and closed.

  A rice cooker, which is one of household electric appliances, includes a main body that houses an inner pot and a lid that closes an upper end opening of the main body so as to be opened and closed. A heating means is disposed inside the main body, and the cooked rice set in the inner pot is cooked by heating the inner pot with this heating means. In addition, as this type of rice cooker, there is a pressure rice cooker in which a sealing means for closing the vent hole of the exhaust passage is provided in the lid body, and the inside of the inner pot can be boosted to a pressure higher than atmospheric pressure. is there.

  These rice cookers perform rice cooking processing and heat insulation processing according to a preset program. The rice cooking process was cooked with a preheating process for maintaining the temperature at a predetermined temperature, a medium heating (heating) process for boiling the inside of the inner pot, a boiling maintenance process for maintaining the boiling state, a cooking process for cooking rice, And an unevenness process for unevenly cooking rice. In the heat retention process, the temperature is adjusted to the heat retention temperature selected by the user. These processes are executed while adjusting the heating by the heating means by detecting the temperature of the inner pot.

  However, if the lid is opened during the execution of these processes, and then the lid is forgotten to close, the temperature in the inner pan will drop rapidly, so the temperature sensor detects the exact temperature of the inner pan. I can't do it. Therefore, it is not possible to accurately execute the preset process.

  On the other hand, Patent Documents 1 and 2 describe rice cookers that can detect the open / closed state of the lid. In these patent documents 1, the container which arrange | positions the spherical member which has the bottom which inclines upward toward the hinge connection part side so that rolling is possible is provided in a cover body, By detecting the rolling position of this spherical member, The open / closed state of the lid can be detected.

  However, in these patent documents, since the spherical member is configured to roll according to the opening and closing of the lid, the rolling operation is unstable due to the resistance between the bottom of the container and the spherical member, and the detection error is There is a problem that arises. That is, the bottom of the container is inclined upward toward the hinge connection portion because it is necessary to move the bottom of the container to a predetermined position with the lid closed. For this reason, even when the lid is opened, the spherical member does not roll until the hinge connecting portion side is tilted downward beyond the horizontal position, and thus the opening of the lid cannot be detected quickly. Moreover, since the spherical member contacts the end of the container when the lid is opened and closed, there is an inconvenience that abnormal noise is generated in association with the collision. Note that this problem is not limited to rice cookers, and similarly occurs in any household electrical appliance that needs to reliably close the lid.

Japanese Utility Model Publication No. 63-129521 JP-A-11-56624

  The present invention has been made in view of the conventional problems, and an object of the present invention is to provide a household electric appliance that can quickly detect the open / closed state of the lid and does not generate abnormal noise.

In order to solve the above-described problems, a household electrical appliance according to the present invention includes a main body having an opening at an upper end, a lid that is rotatably disposed on the main body and closes the upper end opening of the main body, and the lid And a swinging member pivotally supported by the holding mechanism and pivoted to the first movable position when the lid is closed and pivoted to the second movable position when the lid is open. , and a cover state detection means for outputting a signal indicating the open or closed state of the lid by detecting a rotation state of the swinging member, the cover state detection means, have a light-emitting portion and a light receiving portion The swinging member comprises a non-contact sensor that detects the pivoting state of the swinging member in a non-contact state when the swinging member enters the light receiving path of the light receiving unit, and the swinging member extends in a lateral direction. Enters the light receiving path of the light receiving unit at the first movable position and moves away from the light receiving path of the light receiving unit at the second movable position. An intelligent part, a balance part projecting downward from the detection part, and a separate body disposed in the balance part so as to be balanced in a state where the detection part enters the light receiving path of the light receiving part at the first movable position. And a weight .

Here , “output a signal indicating the open / closed state of the lid” means that the lid state detection means outputs an ON signal to indicate the closed state of the lid by detecting the swing member, and the lid state is detected. A configuration in which no signal is output to indicate the open state of the lid body because the means cannot detect the swinging member, and no signal is output to indicate the closed state of the lid body, to indicate the open state of the lid body Including a configuration for outputting an ON signal and a configuration for outputting different signals (for example, a Hi signal and a Low signal) to indicate the open / closed state of the lid.

This household electrical appliance is configured to detect the rotation state of the swinging member pivotally supported by the holding mechanism by the lid state detecting means, and the swinging member swings simultaneously with the opening of the lid. Therefore, the opening of the lid can be detected quickly. Moreover, since the swinging member does not collide with the holding mechanism when the lid is opened and closed, it is possible to reliably prevent the generation of abnormal noise.

The lid state detection means includes a non-contact sensor having a light emitting part and a light receiving part, and the swinging member includes a detection part extending in the lateral direction, a balance part protruding downward, and a first movable position. Since the detection unit has a separate weight disposed in the balance part so as to be balanced in a state in which the detection unit enters the light receiving path of the light receiving unit, the lid state detection unit can reliably rotate the swinging member. Can be detected.

In this household electrical appliance, the lid state detecting means is substantially U-shaped and is disposed in a guide frame in which the swinging member is movably disposed in the facing space. A stopper portion that contacts the swing member that swings from the first movable position to the second movable position in the open state of the lid, and the swing member is in contact with the stopper portion, It is preferable that the configuration is such that a state where a part of the light receiving unit enters a position excluding the detection region in the space facing the guide frame is maintained. In this case, the swinging member interferes with the guide frame when the swinging member swings from the second movable position to the first movable position by rotating the lid from the open state to the closed state. It is possible to prevent malfunction due to

Further, upon detecting a current from the commercial power source, and shifts from the execution state of the backup mode by the battery in a running state by a commercial power source, of the lid more engagement receiving portion of the body to the lid state detector immediately thereafter It is preferable to provide a control means for further detecting the engagement state with the engagement claw portion . Here, the state in which energization from the commercial power source is detected includes both when the user connects the power cord to the commercial power source and when the user recovers from the power failure. If the open / closed state of the lid is detected immediately after detecting the energization from the commercial power supply, the rice cooking process is temporarily stopped due to a power failure, and the user opens the lid and returns at this time. Thus, even when the control is resumed by the control means, it is possible to reliably execute the control as designed.

  The household electrical appliance of the present invention is configured to detect the rotation state of the swinging member pivotally supported by the lid state detecting means, and the swinging member starts swinging simultaneously with the opening of the lid. Therefore, it is possible to quickly detect the opening of the lid. In addition, since the swinging member does not collide with the holding mechanism when the lid is opened and closed, the generation of abnormal noise can be prevented.

It is sectional drawing which shows the rice cooker which is a household electrical appliance of embodiment which concerns on this invention. It is a perspective view which shows the rice cooker of FIG. It is a top view of the lower board which comprises a lid. It is principal part sectional drawing of FIG. It is a disassembled perspective view which shows the structure of the cover state detection means of FIG. (A), (B), (C), (D) is a side view which shows the relationship between the operation state of a rocking | swiveling member, and the detection state of a cover state detection means. (A), (B) is sectional drawing which shows the operation state of the cover state detection means accompanying opening of a cover body. (A), (B) is sectional drawing which shows the operating state of the cover state detection means accompanying the movement of a moving member. It is a top view which shows the state of FIG. It is a top view which shows the state of FIG.8 (B). (A) is a block diagram which shows the structure of a rice cooker, (B) is a graph which shows the judgment of the microcomputer by the relationship between the drive state of a solenoid, and the detection state of a photo interrupter. It is a flowchart which shows the control by a microcomputer. (A) is a flowchart which shows the 1st lid state inspection process of FIG. 12, (B) is a flowchart which shows the 2nd lid state inspection process of FIG. It is a flowchart which shows control of 2nd Embodiment by a microcomputer. 14 is a flowchart continued from FIG. 13 .

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

  FIG. 1 shows a pressure rice cooker that is a household electric appliance according to the first embodiment of the present invention. This rice cooker includes a rice cooker body 11 that removably accommodates an inner pot 10 that is electromagnetically heated, and a lid 23 that is rotatably attached to the rice cooker body 11. And this rice cooker makes it possible to detect the open / closed state and the engaged state of the lid 23 by one lid state detecting means.

  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, which is 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.

  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 able to be opened and closed (turned), and closes the upper end opening 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 71 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 pressure introduction means for boosting the inside of the inner pot 10 to a pressure higher than the atmospheric pressure in the exhaust passage. A relief valve 75 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 38, which will be described later, in the lock release direction. 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 49 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. A metal reinforcing plate 36 is disposed on the upper surface of the lower plate 35. Further, a hinge connection portion 37 is provided on the back portion of the lower plate 35 and is pivotally attached to the hinge receiving portion of the shoulder body 14 so as to be pivotable by a shaft. Further, a lock member 38 is rotatably attached to the front portion of the lower plate 35.

  The lock member 38 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 FIGS. . The lock member 38 is provided with shaft portions 39 on both side surfaces thereof for being pivotally attached to the lower plate 35. Further, on both sides of the lower end edge of the lock member 38, a pair of detachably engaged with the engagement receiving portion 16 of the shoulder body 14 and 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 40 is provided so as to form an L shape. Further, the lock member 38 is provided with a receiving portion 41 at the center of the upper end that extends obliquely upward on the back surface (hinge connecting portion 37) side and abuts the pressing portion 29 of the operation member 27. The lock member 38 is biased to the engagement position shown in FIG. 1 by a kick spring which is a biasing means (not shown).

  Further, as shown in FIG. 1, a lid heater 43 as a third heating means is disposed on the bottom of the lower plate 35 via a metal heater cover 42, and serves as a second temperature detection means. A lid temperature sensor (see FIG. 11A) 44 is provided. Further, the lower plate 35 is provided with a first accommodating portion 45 that accommodates the relief valve 75 disposed in the inner lid 71 and constitutes an inlet portion of the exhaust passage. The first accommodating portion 45 has a dome shape with a lower end opening. A driving opening 46 is provided on the front side, and a packing 47 is disposed in the driving opening 15. Further, in the present embodiment, a second accommodating portion 48 that accommodates the pressure regulating valve disposed in the inner lid 71 is provided beside the first accommodating portion 45. Furthermore, the lower plate 35 is provided with a connected portion 49 for detachably connecting the connecting portion 34 of the steam port unit 30 so as to be positioned below the arrangement recess 26.

  The lower plate 35 is provided with a first solenoid 50 serving as a driving means for the relief valve 75 on the front side of the first housing part 45, and a pressure regulating valve driving means on the front side of the second housing part 48. A second solenoid 51 is provided. These solenoids 50 and 51 are two-position solenoids and are provided with rods that advance and retreat depending on the presence or absence of energization. Further, the solenoids 50 and 51 are configured so that the rod moves backward in the left direction in FIG. 1 when energized, and advances rightward in FIG. 1 by the biasing force of the spring when the energization is interrupted. A pressing member 52 that presses the spherical member 80 of the relief valve 75 through the packing 47 is disposed at the tip of the rod of the first solenoid 50. In addition, a pressing member 53 capable of pressing the pressure regulating valve downward is disposed at the tip of the second solenoid 51.

  The pressing member 52 is provided with a moving member 54 that locks the lid 23 so that it cannot be opened using the driving force of the first solenoid 50. The moving member 54 is formed of a rectangular frame as shown in FIGS. 2 and 3, and when the first solenoid 50 is energized, the rod is retracted, whereby the side of the locking member 38 is interposed via the pressing member 52. On the other hand, when the energization to the first solenoid 50 is interrupted, the rod moves to move away from the lock member 38. An end portion of the moving member 54 on the side of the lock member 38 constitutes a lock portion 55 that is a part capable of moving forward and backward in the moving region of the lock member 38. In the present embodiment, since the first solenoid 50 is positioned at a predetermined interval in the lateral direction from the center, the lock portion 55 is formed so as to protrude toward the center.

  When the moving member 54 is locked by energizing the first solenoid 50, the moving member 54 is in a first moving position where a part of the moving member 54 enters the moving region of the locking member 38, that is, the rotating region below the receiving portion 41. It is moved to a certain lock position (see FIG. 9). Further, when the unlocking operation is performed by shutting off the energization of the first solenoid 50, the unlocking position (see FIG. 4), which is the second moving position completely retracted (separated) from the moving region of the locking member 38. Moved to. The moving member 54 is formed with a thickness such that only a slight gap (play) is formed with the receiving portion 41 of the lock member 38 in a state where the lock portion 55 has moved to the lock position. This gap is generated when the lock member 38 is moved to the lock position and the lock member 38 is rotated so that the receiving portion 41 is in contact with the lock portion 55 and the lock member 38 is engaged. The claw portion 40 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. That is, it is configured such that the engagement allowance between the engagement claw portion 40 and the engagement receiving portion 16 is sufficiently ensured in a state where the lock member 38 is rotated by the clearance.

  The moving member 54 configured as described above is a state in which the engagement claw portion 40 of the lock member 38 is engaged with the engagement receiving portion 16 of the shoulder body 14 with a sufficient engagement margin (hereinafter referred to as “normal engagement state”). .) Can be moved to the locked position. Then, by moving to this lock position, movement of the lock member 38 in the disengagement direction by the operation of the lock release operation unit 28 is prevented. In addition, the moving member 54 has an engagement margin between the engagement claw portion 40 and the engagement receiving portion 16 that is less than the normal engagement state and is insufficient, and the lid 23 may be opened when the internal pressure of the inner pot 10 increases. In a certain state (hereinafter referred to as “abnormal engagement state”), movement to the lock position is prevented by interfering with the receiving portion 41 of the lock member 38 (see FIGS. 10 and 8B). The In addition, if the lock release operation part 28 is operated in the state which moved to the half lock position which is this 3rd movement position, the movement to the engagement releasing direction of the lock member 38 will be permitted.

  In the lid body 23 of the present embodiment, a swing member 61 is provided as a detection member, and the proximity and separation of the swing member 61 are detected by a photo interrupter 67 that is a non-contact sensor. Thus, the open / close state of the lid body 23 can be detected from the output signal of the photo interrupter 67. In the present embodiment, the moving member 54 is provided with a holding portion 56 arranged in a state where the swinging member 61 can swing, so that the moving state of the moving member 54 can be changed by one photo interrupter 67. Further, it can be detected.

  As shown in FIGS. 3 and 5, the swing member 61 is disposed in a swingable state on a holding portion 56 that is a holding mechanism provided integrally with the moving member 54. The holding portion 56 protrudes from the side portion of the moving member 54 and includes a pair of support walls 57A and 57B. A mounting hole 58 is provided in the upper part of the support walls 57A and 57B, and a swinging member 61 is swingably mounted by inserting a separate pin 59 therethrough. In addition, a stopper portion 60 that stops the rotation of the swinging member 61 is provided on the support walls 57A and 57B on the rear side of the upper end of the mounting hole 58.

  The oscillating member 61 includes a rod-shaped detection unit 62 that extends and is positioned below the stopper unit 60 at a predetermined interval. At the tip of the detection unit 62, it protrudes to a position excluding the detection region in the facing space between the light emitting unit 68 and the light receiving unit 69 of the photo interrupter 67 at the locked position (see FIG. 6B) and remains in the facing space. The protruding portion 63 is provided so as to achieve the above state. The swinging member 61 is provided with a balance portion 64 that protrudes downward, and a mounting hole 65 corresponding to the mounting hole 58 is provided above the balance portion 64. A separate weight 66 is disposed at the lower end of the balance portion 64 so that the detector 62 is balanced in a state of extending in the horizontal direction. And this rocking | fluctuation member 61 maintains the state which one part approached into the position except the detection area in the space where the detection part 62 opposes the photo interrupter 67 in the state which the detection part 62 contact | abutted to the stopper part 60. (See FIG. 6C).

  When the swing member 61 is swingably held by the holding portion 56, the detection portion 62 is stopped from the first movable position where the detection portion 62 extends in the orthogonal (horizontal) direction with respect to the support walls 57A and 57B. It is possible to move to the second movable position in contact with 60. Then, when the moving member 54 is moved to the locked position by the first solenoid 50 with the lid 23 closed, the swinging member 61 holds the first movable position via the holding portion 56. It moves to the lock member 38 side. Further, when the lid body 23 is opened, the swinging member 61 rotates to the second movable position with the pin 59 as a fulcrum by trying to maintain the state in which the weight 66 is positioned on the lower side. However, this rotation stops in a state where the detection unit 62 is in contact with the stopper unit 60.

  The photo interrupter 67 detects the proximity and separation of the detection unit 62 of the swinging member 61 in a non-contact state, and includes a light emitting unit 68 provided with a light emitting element and a light receiving unit 69 provided with a light receiving element. I have. The light emitting portion 68 and the light receiving portion 69 are disposed in the opposing wall portion of the guide frame having a substantially U shape. The guide frame guides the swing member 61 to be movable in the facing space. Therefore, a part of the facing space constitutes a detection area. The photo interrupter 67 can receive the light of the light emitting element in a state where the detection unit 62 that is a shield is not present in the detection region, and can detect the light of the light emitting element when the detection unit 62 enters the detection region. The light receiving element cannot receive light. Then, the light receiving state or the non-light receiving state, which means the detection state of the detection unit 62, is output to the microcomputer 82 as a predetermined signal.

The photo interrupter 67 is mounted on the detection substrate 70 and is installed at a height corresponding to the detection unit 62 of the swing member 61. Here, the substantial detection part of the light receiving part 69 is located inside the exposure hole 69a provided in the facing surface. Therefore, the same shape area in the axial direction of the exposure hole 69a constitutes a detection area. As shown in FIG. 6B, the exposed hole 69a is positioned above the protruding portion 63 of the swinging member 61 in a state where the moving member 54 is in the locked position. The light receiving path is not cut off. Further, as shown in FIG. 6C, the exposure hole 69 a is located at a second movable position where the detection unit 62 is in contact with the stopper unit 60 and below the lower end of the detection unit 62. It is configured not to block the light path by detecting unit 62 in position. The photo interrupter 67 is configured such that the light receiving path is blocked by the detection unit 62 when the lid 23 is closed and the moving member 54 is moved to the unlocked position and the half-locked position. In the state where it is moved to the lock position, the protruding portion 63 is positioned below the light receiving path, and is installed at a position where the detecting section 62 does not block the light receiving path. That is, assuming that the moving distance (interval) from the unlocked position to the half-locked position is S1, and the moving distance from the unlocked position to the locked position is S2, these are S1 <S2. For this reason, the region where the moving distance is less than or equal to S <b> 1 is set to be a non-detection region of the photo interrupter 67. That is, the non-detection region means a region in which the light receiving unit 69 of the photo interrupter 67 cannot receive light from the light emitting element of the light emitting unit 68 because the detection unit 62 is blocking the light receiving path. To do. Thereby, when the swinging member 61 moves beyond the distance S1 via the moving member 54, the detection unit 62 deviates from the non-detection region, and the state can be detected.

  As shown in FIG. 1, the inner lid 71 includes a metal inner lid body 72, a lid packing 73, and a resin frame 74, and is detachably disposed at the lower portion of the heater cover 42. . The inner lid 71 is integrally provided with a relief valve 75 disposed in the first housing portion 45 of the lower plate 35 and a pressure regulating valve (not shown) disposed in the second housing portion 48. Has been.

  The inner lid main body 72 serves as a heat radiating plate, and an opening 15 communicating with the inside of the inner pot 10 is provided at a position corresponding to each of the accommodating portions 45 and 48. The lid packing 73 is in close contact with the inner periphery of the opening of the inner pot 10 for sealing. The resin frame 74 is attached to the inner lid body 72 so as not to be detached by being sandwiched between the outer peripheral portions of the inner lid body 72.

  The relief valve 75 includes a valve seat member 76 that has a trapezoidal cylindrical shape, a cover 78 that covers the valve seat member 76, and a spherical member 80 that is housed inside these. The valve seat member 76 includes a vent hole 77 having an opening area that can be exhausted 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 78 corresponds to the driving opening 15 of the first housing portion 45 and includes an insertion hole 79 through which the pressing member 52 of the first solenoid 50 is inserted via the packing 47 so as to be able to advance and retract. The spherical member 80 rolls and closes the vent hole 77 to prevent the air in the inner pot 10 from being exhausted to the outside, and the inner pot 10 can be pressurized to a pressure higher than atmospheric pressure. To do. Further, the inner pressure of the inner pot 10 is returned to the atmospheric pressure (equilibrium) by being released by the pressing member 52 to release (open) the blockage of the exhaust passage. In the present embodiment, when the pressure in the inner pot 10 is increased to 1.30 atm, the spherical member 80 is of a weight that rolls away from the top of the vent hole 77 at that pressure.

  The pressure regulating valve includes a valve body biased downward by a spring, and the vent hole is closed by the valve body. In this pressure regulating valve, the force for closing the vent hole is changed by changing the biasing force of the spring by the pressing member 53. Thereby, the pressure which can pressurize the inside of the inner pot 10 in the range of 1.15 atm to 1.20 atm can be changed.

  Note that the lid body 23 to which the inner lid 71 is attached is formed in the relief valve 75 and the pressure regulating valve, from the gap between them and the housing portions 45 and 48, from the gap between the inner lid body 72 and the heater cover 42, to the connected portion. 49 and the path through the steam port unit 30 constitute an exhaust passage that communicates the inside of the inner pot 10 with the outside.

  In this rice cooker, an operation panel 81 having a switch for a user to input rice cooking conditions and a liquid crystal display panel for displaying a selection state and an operation state is disposed on the front upper portion of the shoulder body 14. . A control board (not shown) is disposed between the exterior body and the protective frame 18. And this rice cooker is controlled according to the program set beforehand by the microcomputer 82 which is a control means mounted in the control board, as shown to FIG. 11 (A).

  In the present embodiment, when the operation of the rice cooking switch disposed on the operation panel 81 is detected, preheating, medium cooking, boiling maintenance, and twice cooking are performed according to the rice cooking program based on the rice cooking conditions set by the liquid crystal display panel. After performing the rice cooking process which consists of each process of including, the heat retention process which heats the cooked rice to predetermined temperature is performed continuously. Then, in the rice cooking process, the open / closed state of the lid body 23 is detected based on the signal from the photo interrupter 67 with the drive of the first solenoid 50 immediately after the reception of the rice cooking switch and at the start of the centering process ( After the determination), a lid state inspection step of detecting (determining) the engagement state of the engagement receiving portion 16 of the rice cooker body 11 and the engagement claw portion 40 of the lock member 38 is executed. Then, when it is determined that the lid 23 is in the closed state and it is determined that the engagement receiving portion and the engagement claw portion 40 are in the normal engagement state, the rice cooking process is executed (continue). 1 treatment). On the other hand, when it is determined that the lid 23 is in the open state, and when it is determined that the engagement receiving portion 16 and the engagement claw portion 40 are in the abnormal engagement state, the first solenoid 50 is energized. It stops, the moving member 54 is unlocked, and the rice cooking process is stopped. And the alerting | reporting process which notifies a user by the piezoelectric buzzer mounted in the control board or the display part provided in the liquid crystal display board is performed (2nd process).

  Next, the opening / closing state determination of the lid body 23 by the microcomputer 82 and the engagement state determination of the engagement receiving portion 16 and the engagement claw portion 40 will be described.

  In the lid state detection process, first, the open / close state of the lid body 23 is determined based on the signal from the photo interrupter 67 in the unlocked operation state where the first solenoid 50 is deenergized. When it is determined that the lid 23 is in the open state, the rice cooking process is stopped, and when it is determined that the lid 23 is in the closed state, the engagement receiving portion 16 and the engagement claw portion 40 are engaged. Make a state judgment. This engagement state determination is based on a signal from the photo interrupter 67 in a lock operation state in which the first solenoid 50 is energized.

  Specifically, the lid 23 is closed so as to be positioned substantially in the horizontal direction with respect to the rice cooker body 11, and the movable member 54 is moved to the unlock position via the first solenoid 50. The moving member 61 is in the state shown in FIGS. 3, 4, and 6 (A). In this state, since the detection unit 62 of the swinging member 61 located at the first movable position has entered the detection area of the photo interrupter 67, the photo interrupter 67 is off. Therefore, as shown in FIG. 11 (B), the microcomputer 82 closes the lid 23 by detecting a state in which the photo interrupter 67 is turned off while the first solenoid 50 is not driven. The state can be judged. In the state where the moving member 54 is unlocked, the spherical member 80 of the relief valve 75 is separated from the vent hole 77 and the inside of the inner pot 10 is opened to the atmosphere.

  Further, when the user performs an opening operation of the lid body 23 on the rice cooker body 11, the lid body 23 extends substantially upward as shown in FIG. 7B through an inclined state shown in FIG. Rotate to position. Then, until the swinging member 61 comes into contact with the stopper portion 60 of the holding portion 56, as shown in FIG. 7A, the detection unit 62 of the swinging member 61 maintains a state of extending in the horizontal direction. In the opened state of the lid 23, as shown in FIGS. 6C and 7B, the detection unit 62 of the swinging member 61 moves away from the detection area of the photo interrupter 67, and the photo interrupter 67 An on signal is output. Therefore, as shown in FIG. 11B, the microcomputer 82 detects the state in which the photo interrupter 67 outputs the ON signal in the OFF state in which the first solenoid 50 is not driven, thereby the lid body 23. Can be determined.

  Furthermore, when the lid 23 is closed with respect to the rice cooker main body 11 and the engaging claw portion 40 and the engagement receiving portion 16 are in the normal engagement state, the first solenoid 50 is locked and moved. The swinging member 61 is located in the state shown in FIG. 6B, FIG. In this state, since the detection unit 62 of the swinging member 61 is separated from the detection area of the photo interrupter 67, the photo interrupter 67 outputs an on signal. Therefore, as shown in FIG. 11B, the microcomputer 82 detects the state in which the photo interrupter 67 is outputting the ON signal in the ON state in which the first solenoid 50 is being driven. It can be determined that the part and the engagement receiving part 16 are in a normal engagement state. In the state in which the moving member 54 is locked, the relief valve 75 can increase the pressure in the inner pot 10 to a pressure higher than the atmospheric pressure by rolling the spherical member 80 onto the vent hole 77.

  When the lid 23 is closed with respect to the rice cooker body 11 and the engagement claw portion 40 and the engagement receiving portion 16 are in the abnormal engagement state, the first solenoid 50 is locked and moved. The swinging member 61 is located in the state shown in FIG. 6D, FIG. 8B, and FIG. In this state, the detection unit 62 of the swing member 61 has entered the detection area of the photo interrupter 67 (not in a state of being detached from the detection area), and thus the photo interrupter 67 is off. Therefore, as shown in FIG. 11 (B), the microcomputer 82 detects the state in which the photo interrupter 67 is turned off while the first solenoid 50 is being driven. It can be detected that the engagement receiving portion 16 is in an abnormal engagement state. Even in this abnormal engagement state, the spherical member 80 of the relief valve 75 rolls on the vent hole 77, and the inside of the inner pot 10 can be increased to a pressure higher than the atmospheric pressure. Of course, by changing the configuration of the pressing member 52, the spherical member 80 can be configured not to roll on the vent hole 77 in the abnormal engagement state.

  Thus, the rice cooker of this embodiment can determine the open / closed state of the lid body 23 and the engaged state between the engagement claw portion 40 and the engagement receiving portion 16 with one sensor 67. Therefore, an increase in product cost can be suppressed and an increase in size can be prevented. In addition, since the moving member 54 provided with the swing member 61 also serves as the driving means of the first solenoid 50 that opens and closes the relief valve 75, the number of parts can be reduced and the cost can be reduced. .

  In addition, the swinging member 61 is provided with a protruding portion 63 that protrudes to a position excluding the detection region in the facing space between the light emitting portion 68 and the light receiving portion 69 with the moving member 54 moved to the locked position. . Further, the swinging member 61 is configured to maintain a state in which a part of the swinging member 61 enters the position excluding the detection region in the facing space between the light emitting unit 68 and the light receiving unit 69 in a state of being in contact with the stopper unit 60. Yes. Therefore, when the moving member 54 moves from the first moving position to the second moving position, and when the swinging member 61 swings from the second movable position to the first movable position, the detection unit of the swinging member 61 is detected. It is possible to prevent 62 from interfering with the casing of the light emitting unit 68 or the light receiving unit 69. As a result, malfunction of the swing member 61 can be prevented.

  Further, since the detection member is constituted by the swing member 61 that is pivotally supported so as to be swingable, the opening of the lid body 23 can be detected reliably and quickly. That is, when the detection member is constituted by a spherical member as in Patent Documents 1 and 2, even if the lid is opened due to the resistance between the container and the spherical member and the inclination of the container, the lid is quickly opened. Cannot be detected. However, in the present embodiment, since the swing member 61 is used, the swing is started simultaneously with the opening of the lid 23, and the opening can be detected quickly. Moreover, in Patent Documents 1 and 2, an abnormal noise is generated when the spherical member collides with the container when the lid is opened and closed. However, in this embodiment, no abnormal noise is generated due to such a collision.

  Next, the control (rice cooking process) by the microcomputer 82 will be specifically described.

  First, in a state in which the user has purchased a rice cooker, the microcomputer 82 operates in a backup mode using a voltage of 3 V by a primary battery (not shown). In this state, when the commercial power supply is turned on by connecting the power cord, a zero cross pulse is input through the power supply circuit, and the operation starts with the voltage from the commercial power supply. And it waits until the switch of the operation panel 81 is operated, and when any operation is detected, the input process is performed.

  And if operation of a rice cooking switch is detected, as shown in FIG. 12, the microcomputer 82 will perform a 1st cover state test | inspection process first by step S1. In the first lid state inspection step, as shown in FIG. 13A, in step S1-1, in the unlocking operation state where the first solenoid 50 is de-energized, the lid is detected by a signal from the photo interrupter 67. 23 is determined. If it is determined in step S1-2 that the lid 23 is in the closed state, the process proceeds to step S1-3. If it is determined that the lid 23 is in the open state, the process proceeds to step S1-8. In step S1-3, the first solenoid 50 is energized (turned on), and then in step S1-4, the engagement receiving portion 16 and the engagement claw portion 40 are received by a signal from the photo interrupter 67. The engagement state is determined. Thereafter, in step S1-5, the first solenoid 50 is de-energized (off) and unlocked, and if it is determined in step S1-6 that the normal engagement state is established, step S1- If it is determined that the engagement state is abnormal, the process proceeds to step S1-8. If the lid 23 is closed and is in a normal engagement state, a flag fa indicating whether the lid 23 is in a normal state or an abnormal state is set to 0 (normal state) in step S1-7. Enter and return. If the lid 23 is opened or the lid 23 is in an abnormal engagement state, 1 (abnormal state) is input to fa in step S1-8, and the process returns. In addition, in the case of reservation rice cooking which starts rice cooking after predetermined time or predetermined time, a lid state inspection process is similarly performed also at the time of operation of the rice cooking switch which is the time of reservation start.

  When this first lid state inspection step is completed, as shown in FIG. 12, in step S2, when fa is 0, that is, the lid body 23 is closed, and the engagement receiving portion 16 and the engagement claw portion If No. 40 is in the normal engagement state, the process proceeds to step S3. When fa is 1, that is, when the lid body 23 is opened, or when the engagement receiving portion 16 and the engagement claw portion 40 are in the abnormal engagement state, the process proceeds to step S11. .

  In step S3, 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.

  Then, when the preheating process is finished by elapse of a preset time, the second lid state inspection process is executed in step S4. In the second lid state inspection step, the lid 23 is closed and is in a normal engagement state after determining the open / close state of the lid 23 and the engagement state of the engagement receiving portion 16 and the engagement claw portion 40. Is different from the first lid state inspection step in that the power supply to the first solenoid 50 is not cut off. That is, in the second lid state inspection step, as shown in FIG. 13 (B), in step S4-1, in the unlocking operation state in which the first solenoid 50 is de-energized, a signal from the photo interrupter 67 is used. The open / close state of the lid 23 is determined. If it is determined in step S4-2 that the lid 23 is in the closed state, the process proceeds to step S4-3. If it is determined that the lid 23 is in the open state, the process proceeds to step S4-7. In step S4-3, after the first solenoid 50 is energized, the lock operation state is set, and in step S4-4, the engagement receiving portion 16 and the engagement claw portion 40 are engaged by a signal from the photo interrupter 67. Determine the status. Thereafter, if it is determined in step S4-5 that the engagement state is normal, the process proceeds to step S4-6. If it is determined that the engagement state is abnormal, the process proceeds to step S4-7. If the lid 23 is closed and is in a normal engagement state, 0 is input to fa in step S4-6 and the process returns. If the lid 23 is opened or the lid 23 is in an abnormal engagement state, 1 is input to fa in step S4-7, and then the first solenoid 50 is entered in step S4-8. Shut off the power and return.

  When the second lid state inspection process is completed, as shown in FIG. 12, in step S5, if fa is 0, the process proceeds to steps S6 and 7, and if fa is 1, the process proceeds to step S11.

  In steps S6 and S7, the temperature raising process and the capacity determination process are performed in parallel while the energization of the first solenoid 50 in step S4-3 in FIG. 13B is maintained. In the temperature raising step in step S6, the induction heating coil 19 is energized with 100% (full power) to boil water containing cooked rice in the inner pot 10. In this temperature raising step, the first solenoid 50 is kept energized. Further, the spherical member 80 rolls on the air hole 77 and closes the air hole 77. As a result, the pressure in the inner pot 10 is gradually increased to a pressure state higher than the atmospheric pressure. The capacity | capacitance discrimination | determination process of step S7 discriminate | determines the rice cooking capacity accommodated in the inner pot 10 with the rising gradient of the temperature of the inner pot 10 under heating.

  When the temperature raising process ends, in step S8, the boiling heating maintaining process is executed by controlling the induction heating coil 19 based on the input value of the lid temperature sensor 44. And if the boiling maintenance process is complete | finished when preset time passes, in step S9, the energization amount with respect to the induction heating coil 19 will be raised, and a cooking process will be performed. In the boiling maintenance step, the inside of the inner pot 10 may be temporarily depressurized by power control, and may be lower than atmospheric pressure. At this time, the energization to the first solenoid 50 is interrupted and the atmosphere is temporarily released. Then, immediately after the air is released, the relief valve 75 is closed by energizing the first solenoid 50 immediately. Also at this time, the lid state inspection step is executed in the same manner as described above.

  If the dry-up in the inner pot 10 is detected based on the detected temperature in the cooking process, the unevenness process is executed in step S10. In this unevenness process, the power supply to the first solenoid 50 is cut off, and the pressure input to the inner pot 10 is released. The energization of the body heater 21 and the lid heater 43 is started, while the energization of the induction heating coil 19 is interrupted.

  When the preset time elapses, the rice cooking process is terminated when the unevenness process is completed, and then the process proceeds to a heat retaining process.

  On the other hand, if it is determined in the first and second lid state inspection steps that the state of the lid 23 is abnormal, in step S11, the rice cooking process is terminated, and in step S12, the piezoelectric buzzer is activated. Alternatively, a notification process for informing the user through the liquid crystal display panel is executed. In the present embodiment, both the case where it is determined that the lid 23 is in the open state and the case where it is determined that the lock member 38 is in the abnormal engagement state are stored by the same flag fa. These may be stored with different flags.

  Thus, in the rice cooker of this embodiment, the energization state to the 1st solenoid 50 is detected, and the opening / closing of the cover body 23 is detected by detecting the rotation position of the rocking member 61 by one photo interrupter 67. The state and the engagement state of the engagement receiving part 16 and the engagement claw part 40 can be detected. And when the cover body 23 is open | released and when the engagement receiving part 16 and the engagement nail | claw part 40 are an abnormal engagement state, a rice cooking process is stopped and a notification process is performed.

  Therefore, it can prevent that rice cooking processing is performed in the state where lid 23 was opened. Therefore, the temperature sensor 22 and 44 can detect the temperature in the inner pot 10 reliably, and can perform the rice cooking process as designed. Moreover, it can prevent that a rice cooking process is performed in the abnormal engagement state of the engagement receiving part 16 and the engagement nail | claw part 40. FIG. Therefore, by performing the rice cooking process in the abnormal engagement state, it is possible to reliably prevent sudden opening of the lid body 23 due to an increase in the internal pressure of the inner pot 10. Further, when there is an abnormality in the closed state of the lid body 23, the energization to the first solenoid 50 is interrupted and the unlocking operation is performed, so that useless power consumption can be prevented.

  In addition, in this embodiment, since the lid state inspection process is executed at the start of reservation for reserved rice cooking, the preheating process immediately after the start of rice cooking, and the operation of the relief valve 75 (such as the temperature rising process), Abnormal cooking with use can be prevented. In other words, when “cooking” is selected, the user may open the lid 23 and put the ingredients in the inner pot 10 during the rice cooking process. Even when the normal white rice menu is selected, it may be possible to open the lid 23 in the middle and then forget to close the lid 23 or to lock the lid 23 securely. However, in this embodiment, since the internal pressure of the inner pot 10 in which the user can open and close the lid body 23 is equal to or lower than the atmospheric pressure and the lid body 23 can be opened, the lid state inspection process is performed. Abnormal rice cooking can be reliably prevented.

  14 and 15 show control by the microcomputer 82 of the rice cooker of the second embodiment. In the second embodiment, when the lid body 23 is determined to be opened and closed and the closure of the lid body 23 is detected in a state where the rice cooking process has been interrupted, the engagement receiving portion 16 and the engagement claw portion 40 The engagement state is determined. And in the open state or the abnormal engagement state of the cover body 23, while stopping a rice cooking process, the condition is alert | reported. Further, when the lid body 23 is determined to be opened and closed in the standby state where the rice cooking process and the heat retaining process are not performed, and the closure of the lid body 23 is detected, the engagement state between the engagement receiving portion 16 and the engagement claw portion 40 Judging. And in the open state or abnormal engagement state of the lid 23, when the user operates the rice cooking switch of the operation panel 81, it is greatly different from the first embodiment in that the situation is notified. Yes.

  Next, the control of the second embodiment by the microcomputer 82 will be specifically described.

  The microcomputer 82 operates in a backup mode (step S <b> 21 below) based on a voltage of 3 V using a primary battery (not shown) when the user has purchased a rice cooker.

  In this state, as shown in FIG. 14, in step S20, the microcomputer 82 detects whether or not the commercial power source is connected based on whether or not a zero cross pulse is input via the power circuit. And when connection to a commercial power source is not detected, the power failure process of step S21 is continued. If the commercial power supply is turned on and the energization from the commercial power supply is detected by inputting the zero cross pulse, the process proceeds to step S22.

  In step S22, a power failure recovery process based on the state before the power failure and the state at the time of power failure recovery and a lid state inspection step are executed, and the process proceeds to step S23. Specifically, in the 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, the rice cooking process continued from the state before the power failure. To do. Moreover, in the state other than that before a power failure, it is set as the standby state which is not performing both the rice cooking process including a reserved rice cooking, and a heat retention process. Further, the lid state inspection step is a closed state in which the open / close state of the lid body 23 is detected by the photo interrupter 67 when the first solenoid 50 is in an inoperative state, as in the first lid state inspection step of the first embodiment. In this case, as the operating state of the first solenoid 50, the engagement state between the engagement receiving portion 16 and the engagement claw portion 40 is determined by the photo interrupter 67. When the lid body 23 is in an open state, or when the lid body 23 is closed but the engagement receiving portion 16 and the engagement claw portion 40 are in an abnormal engagement state, a notification process is executed. .

  In step S23, it is detected whether or not a flag fb indicating whether or not the lid body 23 is open is zero. If fb is 0 (closed state), the process proceeds to step S24, and if fb is 1 (open state), the process proceeds to step S26.

  In step S <b> 24, the state where the first solenoid 50 is deenergized is maintained, and it is detected by the signal from the photo interrupter 67 whether or not the lid 23 has been opened. If the opening of the lid 23 is detected by inputting the ON state of the photo interrupter, the process proceeds to step S25, and 1 is stored in fb to store the fact that the lid 23 is opened. Proceed to step S26. If the opening of the lid 23 is not detected, the process proceeds to step S34 shown in FIG.

  In step S <b> 26, the state where the power supply to the first solenoid 50 is cut off is maintained, and it is detected whether or not the lid body 23 is closed by a signal from the photo interrupter 67. Then, when the OFF state of the photo interrupter is inputted, the process proceeds to step S27 when the cover 23 is detected to be closed, and when the cover 23 is not detected, the process directly proceeds to step S34 shown in FIG. move on.

  In step S27, 0 is input to fb to store that the lid 23 is closed. Thereafter, in step S28, the movable member is locked by energizing the first solenoid 50 for a predetermined time. In step S29, it is determined from the signal from the photo interrupter 67 whether the engagement receiving portion 16 and the engagement claw portion 40 are in a normal engagement state or an abnormal engagement state. Thereafter, in step S30, the energization of the first solenoid 50 is interrupted, and the moving member 54 is unlocked. If it is determined in step S31 that the lid body 23 is in the normal engagement state, the process proceeds to step S32, and 0 (normal engagement state) is input to the flag fc indicating the engagement state of the lid body 23. The process proceeds to step S34 shown in FIG. If it is determined that the lid 23 is in the abnormal engagement state, the process proceeds to step S33, 1 (abnormal engagement state) is input to fc, and the process proceeds to step S34 shown in FIG.

  As shown in FIG. 15, in step S34, it is detected whether or not the switch of the operation panel 81 has been operated. If any switch operation is detected, the process proceeds to step S35. If any switch operation is not detected, the process proceeds to step S39.

  In step S35, it is judged whether the switch which detected operation is a rice cooking switch. And when it is not a rice cooking switch, it progresses to step S36, the switch reception process corresponding to the switch which detected operation is performed, and it progresses to step S39. Moreover, when it is a rice cooking switch, it progresses to step S37.

  In step S37, it is read whether or not the lid is in an open state in which 1 is input to fb, and whether or not the engagement is abnormal in which 1 is input to fc. And when the cover body 23 is obstruct | occluded and it is a normal engagement state (fb, fc = 0), it progresses to step S36 and receives operation of a rice cooking switch. Thereby, the rice cooking process including reservation rice cooking is performed in parallel with this switch reception process. In addition, when the lid 23 is opened and when it is in the abnormal engagement state, the process proceeds to step S38, and a notification process for notifying the user with the piezoelectric buzzer or the liquid crystal display panel without accepting the operation of the rice cooking switch is performed. After execution, the process proceeds to step S39.

  In step S39, it is detected whether or not the supply of electric power from the commercial power source is interrupted when the input of the zero cross pulse signal is interrupted. And when electricity supply from a commercial power supply is interrupted | blocked, it returns to step S20 shown in FIG. On the other hand, when the energization from the commercial power source is not interrupted, the process returns to step S23 shown in FIG.

  In addition, in 2nd Embodiment, after receiving operation of a rice cooking switch, you may perform the rice cooking process containing the cover state test | inspection process similar to 1st Embodiment. Moreover, in 2nd Embodiment, even when switches other than a rice cooking switch are operated, it is good also as a structure which performs an alerting | reporting process.

  As described above, in the second embodiment, when energization from the commercial power source is detected in the battery backup mode execution state, the operation starts with the power from the commercial power source, and immediately after the lid state inspection process is performed, The photo interrupter 67 is configured to further detect the engagement state between the engagement receiving portion 16 and the engagement claw portion 40. Therefore, when the user enters an abnormal engagement state by opening and closing the lid 23 in a state where the rice cooking process is temporarily stopped due to a power failure, the state can be reliably detected. As a result, it is possible to reliably prevent forgetting to close the lid 23 after the unintended opening of the lid 23 and cooking rice in a state where the lid 23 is not securely locked, and control as designed (rice cooking process). Can be executed.

  Further, when the opening / closing of the lid body 23 is detected during normal use, the lid body is closed to the user substantially simultaneously with the operation of the rice cooker switch in order to execute an engagement state inspection process between the engagement receiving portion 16 and the engagement claw portion 40. It is possible to recognize whether there is an abnormality in the 23 closed states. For this reason, it is possible to improve the convenience of use for the user and to surely execute the control designed in advance.

  In addition, the household electrical appliance of this invention is not limited to the structure of said each embodiment, A various change is possible.

  For example, in the above-described embodiment, the holding portion 56 of the swing member 61 is disposed on the movable member 54 so that the engagement receiving portion 16 of the rice cooker body 11 and the engagement claw portion 40 of the lock member 38 are engaged. Although the combined state is configured to be detectable, it may be configured to detect only the open / closed state of the lid body 23 by being disposed on the lower plate 35 of the lid body 23.

  Further, in the embodiment, the photo interrupter 67 in which the light emitting unit 68 and the light receiving unit 69 are arranged to face each other is used as the lid state detecting means, and the swinging member 61 as a detection member transmits light from the light emitting unit 68 to the light receiving unit 69. Although it is configured to detect the proximity and separation states by blocking, the oscillating member 61 is made of a reflective material using a reflective photoreflector, or is subjected to a surface treatment by painting. It may be configured such that light can be received by entering the light receiving path of the light receiving unit 69 and an ON signal is output. However, in this case, the light emitting portion 68 and the light receiving portion 69 are disposed on the same wall portion of the guide frame.

  In the above-described embodiment, the photo interrupter 67 is configured to output an on signal by detecting the swinging member 61 and to be in an off state in which no signal is output in a state where no detection is performed. An off state in which no signal is output may be used, and an on signal may be output in a state where no signal is detected. Of course, different signals (for example, a Hi signal and a Low signal) may be output when detected and not detected.

Furthermore, in the above embodiment, the detection portion 62 extending the swing member 61 in the horizontal direction, have been formed into an inverted L-shape consisting of balancing unit 64. extending in the vertical direction, detecting section 62, the horizontal direction It is good also as a structure which is not restricted to the structure extended and inclines at a predetermined angle.

  Furthermore, in each embodiment, the moving member 54 is disposed on the rod of the first solenoid 50 that operates the relief valve 75, and the lock member 38 is locked and unlocked in conjunction with the opening / closing operation of the relief valve 75. However, a dedicated solenoid (drive means) may be provided. Of course, you may drive with a motor instead of a solenoid.

  Further, in each of the above embodiments, the moving state of the swing member 61 that is a detection member is detected by the photo interrupter 67 that is a non-contact type sensor, but may be detected by a switch that is a mechanical sensor. The configuration of the sensor can be changed as desired. In addition, the swing member 61 is not limited to the configuration that is detected by the single sensor 67, and may be configured to be detected by two or more sensors.

  In each embodiment, the rice cooker has been described as an example of household electrical appliances. However, the present invention is also applicable to other household electrical appliances having an automatic bread maker, an electric pot, and a lid 23 that can be opened and closed. It is.

DESCRIPTION OF SYMBOLS 10 ... Inner pan 11 ... Rice cooker main body 19 ... Induction heating coil 22 ... Inner pan temperature sensor 23 ... Cover body 37 ... Hinge connection part 54 ... Moving member 56 ... Holding part (holding mechanism)
60 ... Stopper 61 ... Oscillating member (detection member)
62 ... detection part 63 ... protruding part
64 ... Balance section
66 ... weight 67 ... photo interrupter (lid state detecting means)
68 ... Light emitting part 69 ... Light receiving part 82 ... Microcomputer (control means)

Claims (3)

A body having an opening at the upper end;
A lid that is pivotally disposed on the main body and closes an upper end opening of the main body;
A holding mechanism provided on the lid;
A swinging member pivotally supported by the holding mechanism, pivoted to the first movable position when the lid is closed, and pivoted to the second movable position when the lid is open;
A lid detecting means which outputs a signal indicating the open or closed state of the lid by detecting a rotation state of the swinging member,
Equipped with a,
The lid state detection means has a light emitting part and a light receiving part, and detects the rotation state of the swinging member in a non-contact state when the swinging member enters the light receiving path of the light receiving part. Type sensor,
The swinging member extends in a lateral direction and enters a light receiving path of the light receiving unit at a first movable position, and protrudes downward from the detection unit at a second movable position and separated from the light receiving path of the light receiving unit. A balance portion, and a separate weight disposed in the balance portion so as to be balanced at a first movable position in a state where the detection portion enters the light receiving path of the light receiving portion.
Household appliances characterized by that. The lid state detecting means has a substantially U shape and is disposed in a guide frame that movably disposes the swinging member in the facing space.
The holding mechanism is provided with a stopper portion that comes into contact with a swinging member that swings from the first movable position to the second movable position in the open state of the lid,
The swinging member is configured to maintain a state in which a part of the swinging member enters a position excluding a detection region of the light receiving unit in a facing space of the guide frame in a state where the swinging member is in contact with the stopper unit. The household electrical appliance according to claim 1 . Upon detection of the power from the commercial power source, and shifts from the execution state of the backup mode by the battery in a running state by a commercial power source, the engagement of the engagement receiving portion and the lid member of more the body to the lid state detector immediately thereafter The household electrical product according to claim 1 or 2, further comprising a control means for further detecting an engagement state with the claw portion .

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