JP5752491B2 - Pressure cooker - Google Patents

Description

  The present invention particularly relates to a pressure rice cooker having a plurality of pressure regulating valves and capable of regulating pressure in multiple stages.

  Generally, a rice cooker has a plurality of heating means such as a work coil, a heat retaining heater, and a lid heater, and automatically cooks and heats using these heating means to provide the user with optimal rice and the like. Widely known.

  By the way, if you cook rice with the inner pot in a pressurized state during each rice cooking process, heat conduction and water absorption speed into the rice will be accelerated, resulting in sufficient water absorption and shortening more delicious rice without uneven cooking. You can cook it in time. Pressure-type rice cookers that meet such demands are already known.

  By the way, the thing of a postscript patent document 1 is known as what provides two pressure regulation valves in a pressure type rice cooker, and performs pressure regulation in multiple steps. In this prior art, the first pressure regulating valve is composed of a first solenoid and a spherical valve that is the first valve, and the spherical valve is moved horizontally by the first solenoid to open and close the first opening, The second pressure regulating valve is composed of a poppet-like valve that is a second solenoid and a second valve, a pressing member 55 that is movable in the horizontal direction, a trapezoidal protrusion 56 having an inclined portion that is a cam member, and a vertical direction. A movable vertical pressing member 57, a spring receiving portion 93, a shaft portion 85, and a valve packing 90 are interposed, and the valve packing 90 is moved in the vertical direction by a second solenoid so that the second opening is closed. Can be switched between a low state and a high state.

  Then, the first opening is open and the second opening is non-pressurized rice with a low cutoff pressure, the first opening is closed and the second opening is low pressure cooking with a low cutoff pressure, and the first opening is closed and the second is closed. The opening has a 3 rice cooking function of high pressure rice cooking with a high deadline pressure, and rice cooking is performed by selecting a necessary rice cooking function.

  By the way, since the said conventional thing uses the poppet-shaped thing as a 2nd pressure regulation valve, as above-mentioned, six types of parts are needed, and a structure becomes complicated so much and cost increases.

  Moreover, although a safety valve is required for a pressure rice cooker, the above-mentioned conventional one uses both the first valve and the second valve as pressure regulating valves in a high pressurization state (see paragraph 0052). For this reason, a separate safety valve is required, and the provision of the safety valve increases the cost.

  Further, transmission of force from the conventional second solenoid to the poppet-like second valve is performed between the trapezoidal protrusion 56 having an inclined portion as a cam member and the vertical pressing member 57 movable in the vertical direction. Therefore, the tip of the vertical pressing member 57 inevitably swings in the left-right direction, and it is difficult to transmit force smoothly.

Japanese Patent No. 4350680

  The object of the present invention is to regulate the pressure of a part of a plurality of pressure regulating devices with a rotating member, and further to have a function as a safety valve, thereby simplifying the structure of the pressure regulating device, smoothing the transmission of force, and It is to provide a rice cooker that reduces costs.

  In order to achieve the above object, the present invention adopts the following configuration.

In the invention which concerns on Claim 1, it is a pressure type rice cooker which can perform the non-pressurized rice cooker which has a rice cooker main body, and the cover body located above the said rice cooker main body, low pressure rice cooking, and high pressure rice cooking. The rice cooker body includes an inner pot and a heating means for heating the inner pot, and the lid includes a first pressure adjustment device and a second pressure adjustment device, and the first pressure adjustment. The device has a spherical first valve body that opens and closes the first vent hole, and the second pressure adjusting device has a spherical second valve body that opens and closes the second vent hole, and the first valve body The first vent hole is opened and closed by being pressed in the horizontal direction, and the second valve body is pressed in the vertical direction through the rotating member to increase the closing force with respect to the second vent hole. acts as a safety valve, wherein during non-pressurized圧炊rice, the first valve body opens the first vent hole, like that the second valve body is not pressed And closing the second vent hole, and during the low pressure rice cooking, the first valve element closes the first vent hole, and the second valve element is closed without closing the second vent hole. In the high pressure rice cooking, the first valve body closes the first vent hole, and the second valve body closes the second vent hole while being pressed .

In the invention which concerns on Claim 2, it is a pressure type rice cooker which has a rice cooker main body and the cover body located above the said rice cooker main body, Comprising: The said rice cooker main body heats an inner pot and the said inner pot. Heating means, and the lid includes a first pressure adjusting device and a second pressure adjusting device, and the first pressure adjusting device includes a spherical first valve body that opens and closes the first vent hole. The second pressure adjusting device has a spherical second valve body that opens and closes the second vent hole, a plunger, an elastic member, and a rotating member that presses the second valve body in a vertical direction. The plunger and the rotating member are linked via the elastic member, and the first valve body opens and closes the first vent hole by being pressed in the horizontal direction, and the second valve body Closes the second vent hole only by its own weight when the plunger is not operating, and when the plunger is operating When pressed in the vertical direction via the rotating member, it increases the closing force on the second vent hole and functions as a safety valve. When the internal pressure is abnormal, the elastic member deforms to deform the rotating member. A configuration that allows rotation in a direction to reduce the closing force .

  In the present invention, the spherical first valve body is pressed in the horizontal direction to open and close the first vent hole, and the spherical second valve body is pressed in the vertical direction via the horizontal moving member and the rotating member. By increasing the closing force with respect to the second vent hole and causing it to function as a safety valve, the structure of the pressure adjusting device can be simplified, force transmission can be smoothed, and as a result, the pressure adjusting function can be enhanced. In addition, the number of parts can be reduced, and the production cost can be reduced.

  Furthermore, the second valve body can be used as a safety valve, and the number of parts and production cost can be further reduced.

Whole sectional view in the state where the lid top member of the pressure type rice cooker was removed (A-A line sectional view of Drawing 2) The perspective view which looked at the cover body of the state which removed the cover upper member from diagonally upward Exploded perspective view of components such as the first pressure regulator The exploded perspective view of each part of the 2nd pressure regulation device The perspective view which looked at the rotation member unit of the 2nd pressure regulator from diagonally upward. The perspective view which looked at the rotation member unit of the 2nd pressure regulator from diagonally downward. Assembly perspective view of each component such as the first and second pressure regulators in the absence of a lid lower member The expanded sectional view which shows the state at the time of non-operation (at the time of solenoid off) and operation (at the time of solenoid on) of the 1st pressure regulation device, and the state where steam is discharged beforehand when the lid is opened during pressurized rice cooking The expanded sectional view which shows the state at the time of non-operation (at the time of solenoid OFF) of the 2nd pressure regulator The expanded sectional view which shows the state at the time of operation | movement (at the time of solenoid ON) of the 2nd pressure regulator.

  1 shows a longitudinal cross-sectional view taken along line AA of FIG. 2 with the lid upper member removed, and FIG. 2 shows a perspective view of the lid body with the lid upper member removed obliquely from above. Shows an exploded perspective view of each part such as the first pressure regulator, FIG. 4 shows an exploded perspective view of each part such as the second pressure regulator, and FIGS. 5 and 6 show part of the second pressure regulator. FIG. 7 shows an assembly perspective view of the first and second pressure adjusting devices and the like with the lid lower member removed. In addition, let the hinge axis | shaft 58 side of the pressure type rice cooker 20 be a back side, let the lock lever 50 side of the other side of the hinge axis | shaft 58 be a front side, and let the side orthogonal to the front-back direction be the left-right direction side.

  The whole of the pressure rice cooker 20 is shown in FIG. The pressure rice cooker 20 includes a rice cooker body 21 and a lid 40. The rice cooker main body 21 has an outer case 22 made of a steel plate case or a synthetic resin, and an inner pan 23 such as a metal pan or an earthen pan is detachably set in the outer case 22. On the outside, an inner case 24 that is a protective frame along the shape of the inner pot 23 is provided. The inner case 24 is made of a heat-resistant synthetic resin such as polyethylene terephthalate, for example, and a sensor insertion hole is provided in the center of the bottom portion for allowing the temperature sensor 25 made of a thermistor to face.

  The upper end of the inner case 24 is integrally coupled to the upper end of the outer case 22 via the shoulder member 26. A bottom work coil 27 and a side work coil 28 which are heating means for induction heating the inner pot 23 are provided on the bottom outer surface of the inner case 24 and the curved outer surface from the bottom to the side. The bottom work coil 27 and the side work coil 28 are provided concentrically around the center of the bottom of the inner case 24 at each position of the bottom and curved portions of the inner case 24.

  A coil support base 29 made of synthetic resin is provided outside the bottom work coil 27 and the side work coil 28. By attaching the coil support base 29 to the inner case 24 with screws or the like, the bottom work coil 27 is provided. The side work coil 28 is positioned and fixed at a predetermined position shown in the figure.

  A bottom member 31 is attached to the lower end portion of the outer case 22 with a screw or the like, and the outer case 22 and the bottom member 31 form a container having an opening upward. A control board 32 is provided inside the rear of the outer case 22 so as to hang from the shoulder member 26.

  On the control board 32, electric parts such as a microcomputer and a power supply circuit for controlling heating means such as the bottom work coil 27 and the side work coil 28 are mounted. Since some of these electrical components generate heat, a cooling fin 33 for cooling the heating elements and the like and a cooling fan 34 for radiating heat from the cooling fin 33 are provided in the vicinity of the control board 32. A cord winder 35 is provided on the rear side of the control board 32.

  The lid body 40 includes a resin lid upper member that forms an outer peripheral surface (not shown) and a lid lower member 42. The lid lower member 42 is a resin-made member like the lid upper member, and a U-shaped notch 43 in plan view in which the hinge shaft 58 and the hinge spring 59 are disposed is provided in the rear part thereof.

  Further, a circular steam discharge cylinder 44 is provided at the center and rear of the lid lower member 42, and the steam in the inner pot 23 passes through a steam passage provided in the lid upper member from the steam discharge cylinder 44 and is covered. It is discharged to the outside through a steam port provided on the upper surface of the upper member.

  On the lower lid member 42, a metal reinforcing member 46 for increasing the strength of the lid 40 is provided as shown in FIG. The reinforcing member 46 includes a first reinforcing member 46a located on the front side and a second reinforcing member 46b located on the rear side, and is screwed to the lid lower member 42 in a form extending in the front-rear direction.

  The first reinforcing member 46a and the second reinforcing member 46b are separated from each other on the rear side, the overall durability of the reinforcing member 46 is lower than that of the integrated reinforcing member 46, and the pressure adjusting device breaks down. When the abnormality occurs, the deformation is caused in the vicinity of the dividing position, and the cover 40 is suddenly opened by releasing the steam from the deformed portion, or the adverse effect such as the steam suddenly ejecting from the front side is prevented.

  A bearing hole 47 for supporting the lever shaft 57 of the lock lever 50 is provided at the front end of the first reinforcing member 46a, and a hinge shaft 58 is supported at the rear end of the second reinforcing member 46b. The bearing hole 48 is provided.

  A metallic lock lever 50 that is a lid opening / closing member is provided on the front side of the lid lower member 42. As shown in FIG. 3, the lock lever 50 is a metal member having an L-shaped cross section including a horizontal portion 51 and a vertical portion 52.

  The horizontal part 51 includes a first horizontal part 51a, a second horizontal part 51b, and a third horizontal part 51c, and the first horizontal part 51a is bent at a substantially right angle above the first sliding member 70 to be in contact with. The second horizontal portion 51b is formed with a circular insertion port 55a for inserting a pressing member 55 (see FIGS. 1 and 2), and the third horizontal portion 51c is provided with a lock lever. A locking port 56 that locks one end of a lever spring 57a (see FIG. 8) for rotating 50 is formed.

  The pressing member 55 is a member having a T-shaped cross section composed of a horizontal disk and a rod-shaped portion, and is inserted into the circular insertion port 55a of the second horizontal portion 51b in a state where the coil spring 55b (see FIG. 1) is inserted into the rod-shaped portion. The nut is inserted and screwed into the lower end of the nut so as to be swingable. Even when a force is applied obliquely from above, the lock lever 50 is properly rotated.

  The vertical portion 52 is cut substantially in the shape of a tunnel from below, and a locking portion 52a having a substantially rectangular shape in plan view bent at a right angle to the rear side is formed at the lower ends of the remaining left and right vertical portions. Is done. The locking portion 52a is locked to a locking piece 26a (see FIG. 8) formed on the shoulder member 26, thereby closing the lid 40.

  The lock lever 50 is fitted with a rod-like lever shaft 57 into which a coiled lever spring 57a is inserted, and both ends of the lever shaft 57 are provided on the left and right bearing holes 47, 47 of the first reinforcing member 46a. Inserted into the shaft and supported by the shaft. After the lever shaft 57 is inserted into the bearing holes 47, 47, one end of the lever spring 57a is locked to the locking port 56 of the third horizontal portion 51c, and the other end is locked to the lid lower member 42 side. As a result, the lock lever 50 is attached in the state shown in FIGS. 2 and 3 with a counterclockwise spring force applied.

  When a pressing button (not shown) provided on the upper surface of the lid upper member is pressed from above or by a slide lever or the like, the force is transmitted to the pressing member 55, and when the pressing member 55 is moved downward, the lock lever 50 is As a result, the lid 40 is opened by the spring force of the hinge spring 59.

  A hinge shaft 58 and a hinge spring 59 which are hinge portions are provided in a notch 43 on the rear side of the lid lower member 42. Both ends of the hinge shaft 58 are inserted and supported in bearing holes 48 and 48 at the rear end of the second reinforcing member 46b. A coiled hinge spring 59 is inserted into the hinge shaft 58, one end 59a of the hinge spring 59 is locked to the first reinforcing member 46a (see FIG. 2), and the other end 59b is a shoulder member. 26, and a spring force is always applied to the lid 40 in the opening direction.

  At the center of the lid lower member 42, a valve cover 60 having a rectangular shape in plan view that is open downward and protrudes upward is provided. The valve cover 60 includes a first valve cover 60a and a second valve cover 60b. The second valve cover 60b is a rectangular portion having a small height but a large area in plan view. The valve storage chamber 95 and the like are stored, and the first valve cover 60a is a rectangular portion in plan view that protrudes further upward from a substantially quarter portion of the second valve cover 60b. The chamber 94 is stored.

  A first solenoid 68, which is a component of the first pressure adjusting device, is disposed horizontally and in the front-rear direction on the front side of the first valve cover 60a. A second solenoid 75, which will be described later, which is a component of the two-pressure adjusting device, is disposed horizontally and in the front-rear direction. As a result, the first solenoid 68 and the second solenoid 75 are arranged close to and in parallel. The first solenoid 68 and the second solenoid 75 are two-position ones, but other ones may be used.

  As shown in FIGS. 2 and 3, a resin-made support member 63 having a substantially rectangular shape in plan view is disposed on the upper surface of the lid lower member 42 in front of the valve cover 60. The support member 63 is a shallow dish-shaped member on which the pressure adjusting device or the like is placed, and a flange 63a that protrudes in the left-right direction and has one screw hole 63a1 is provided on the upper end of the side wall. At the front end thereof, a shaft through-hole 63b (see FIG. 3) through which the lever shaft 57 of the lock lever 50 is inserted is provided. The support member 63 is attached to the upper surface of the first reinforcing member 46a by inserting the lever shaft 57 into the shaft through-hole 63b and screwing the screw into the lower lid member 42 from the screw hole 63a1.

  On the upper surface of the support member 63, a first solenoid storage chamber 64 having a rectangular shape in plan view for storing the first solenoid 68 described later, and an elongated rectangular shape in plan view for storing a part of the first sliding member 70 described later. The first sliding member storage chamber 65, the second solenoid storage chamber 66 having a rectangular shape in plan view for storing the second solenoid 75 described later, and the L shape in plan view for storing the second sliding member 77 described later. The second sliding member storage chamber 67 is provided.

  A first solenoid 68 is housed horizontally and in the front-rear direction in the first solenoid housing chamber 64 on the support member 63. At the upper end and the lower end of the side wall surface of the first solenoid 68, there is provided a mounting flange 68a having a rectangular shape in plan view extending in the left-right direction and having a screw hole 68b at the center thereof. The first solenoid 68 is fixed to the lid lower member 42 by screwing together.

  The first solenoid 68 is provided with a first plunger 69 that moves forward and backward by turning the first solenoid 68 on and off.

  The front end of the first plunger 69 is provided in the front-rear direction so as to face the first valve cover 60a having a high height, and a spring support 69a having a C-shape in front view is attached to the front end. A coil spring 69b is inserted between the first solenoid 68 and the spring support 69a so as to be inserted into the outer periphery of the first plunger 69, and the first plunger 69 is in the first state when the first solenoid 68 is turned off. It is pulled out from the solenoid 68 to the rear side.

  As shown in FIG. 3, the first sliding member 70, which is a sliding portion, is integrally formed in a substantially fishhook shape in plan view having a longitudinally elongated portion 71, a laterally elongated portion 73, and a longitudinally elongated portion 72. This resin member is disposed so as to be movable in the front-rear direction along the first solenoid housing chamber 64 having a rectangular shape in plan view.

  The front / rear direction elongated portion 71 is an elongated rectangular portion in plan view that extends long in the front / rear direction, and protrudes upward on the upper surface of the front end thereof, and has a rectangular shape in front view inclined upward from the front to the rear. The inclined protrusion 71a is integrally provided, and a front side hanging part 71b and a rear side hanging part 71c are provided in parallel on the lower surface thereof with a gap therebetween.

  A rear side of the front side hanging part 71b of the longitudinally extending part 71 in the front-rear direction is housed in the first sliding member housing chamber 65 on the support member 63, the rear wall surface of the rear side hanging part 71c, and the first sliding part. A coil spring 74 is interposed between the inner end wall surface 65a (see FIG. 3) of the member storage chamber 65, and always biases the first sliding member 70 forward.

  The front / rear direction short extension portion 72 is a rectangular portion in plan view that extends short in the front / rear direction, and moves in the front / rear direction in a form along the outer wall portion of the first solenoid housing chamber 64.

  The laterally elongated portion 73 is a portion connecting the longitudinally elongated portion 71 and the longitudinally elongated portion 72, and a semicircular arc space 73a (see FIG. 3) is integrally formed, and a rod-like valve pressing protrusion 73b protruding rearward is integrally formed on the rear side wall surface.

  A spring support 69a of the first plunger 69 is accommodated in the semicircular arc space 73a. When the first solenoid 68 is turned off, the spring support 69a is moved by the spring force of the coil spring 69b. Is pushed backward.

  When the first solenoid 68 is on, the first plunger 69 is pulled forward together with the spring support 69a. However, since the spring support 69a and the semicircular space 73a are not connected, the first sliding member 70 does not move forward. However, in this case, since the coil spring 74 is interposed between the first sliding member 70 and the support member 63, the first sliding member 70 is moved by the spring force of the coil spring 74. It moves forward as soon as it moves forward.

  The valve pressing protrusion 73b is disposed so as to face the first spherical valve 99 described later, and when the first solenoid 68 is turned off, the first spherical valve 99 is pressed to open the first vent hole 97 described later. When the first solenoid 68 is turned on, it is separated from the first spherical valve 99. As a result, the first spherical valve 99 moves by its own weight directly above the first vent hole 97 and closes the first vent hole 97.

  A second solenoid 75 is housed horizontally and in the front-rear direction in the second solenoid housing chamber 66 on the support member 63. At the upper and lower ends of the side wall surface of the second solenoid 75, there are provided mounting flanges 75a having a rectangular shape in plan view and extending in the left-right direction in the same manner as the first solenoid 68, and having a screw hole 75b at the center. 4 (shown from the right side of FIG. 2). The second solenoid 75 is fixed to the lid lower member 42 by screwing a screw through the screw hole 75b.

  The second solenoid 75 is provided with a second plunger 76 that is a horizontal moving member that moves forward and backward when the second solenoid 75 is turned on and off.

  The distal end of the second plunger 76 is provided in the front-rear direction so as to face the second valve cover 60b having a low height, and a C-shaped spring support 76a in front view is attached to the distal end. A coil spring 76b is inserted between the second solenoid 75 and the spring support 76a so as to be inserted into the outer periphery of the second plunger 76, and the second plunger 76 is in the second state when the second solenoid 75 is off. It is pulled out from the solenoid 75 to the rear side.

  As shown in FIG. 4, the second sliding member 77 that is a sliding portion is a resin member that is integrally formed in an L shape in a plan view and includes a left-right direction extending portion 78 and a front-rear direction extending portion 79. The L-shaped second sliding member storage chamber 67 is disposed so as to be movable in the front-rear direction.

  The front-rear direction extending portion 79 is a rectangular portion in plan view that extends in the front-rear direction, and moves in the front-rear direction in a form along the outer wall portion of the second solenoid housing chamber 66.

  The left-right direction extending part 78 is a part that is orthogonally connected to the front-rear direction extending part 79, and a semicircular arc groove space 78a (FIG. 4) having a semicircular arc shape with an opening at the front and a part of the front. Reference) is integrally formed, and two cylindrical protrusions 80 protruding rearward are formed at the lower end of the rear wall surface 78b so as to be separated in the left-right direction.

  A spring support 76a of the second plunger 76 is accommodated in the semicircular groove space 78a. When the second solenoid 75 is turned off, the spring support 76a is moved by the spring force of the coil spring 76b to the second sliding member 77. The whole is pushed backward.

  When the second solenoid 75 is on, the second plunger 76 is pulled forward together with the spring support 76a. However, since the spring support 76a and the semicircular groove space 78a are engaged, the second sliding member 77 is also moved forward at the same time.

  A spring groove 80a is provided on the inner upper end of each of the two cylindrical projections 80, and a stainless steel rod-shaped spring bar 81 engaged with a rotating member 87, which will be described later, is fitted in the spring groove 80a. Is done.

  A rotating member unit 85 is provided on the rear side of the second sliding member 77 so as to face the rear wall surface 78b. The rotation member unit 85 includes a storage casing 86, a rotation member 87, an interlocking member 88, and a spring 89. FIG. 5 shows a perspective view from above, and FIG. 6 shows a perspective view from below (note that 4 and 5 are reversed in the left and right directions.)

  The housing casing 86 is a resin member having a rear circular shape in front plan view, and a rectangular portion on the front side thereof is open on the upper side and is opposed to both side walls thereof. A bearing groove 86a for pivotally supporting 87c is formed.

  The circular portion on the rear side is open in the up-down direction, and a roof portion 86b having a cross-sectional gate shape pointed in the left-right direction is formed above, and opposed to both side surfaces thereof. Thus, a sliding groove 86c for sliding the interlocking member 88 in the vertical direction is formed.

  Further, two mounting flanges 86d having screw holes 86d1 are provided on the side wall surface of the storage casing 86 so as to face each other. By screwing screws through the screw holes 86d1, the storage casing 86 is attached to the lid lower member 42. Secure to.

  The rotating member 87 is a rectangular resin member that is elongated in the front-rear direction in plan view and includes a front flat plate portion 87a and a rear flat plate portion 87b. The rear flat plate portion 87b is slightly longer than the front flat plate portion 87a. At the same time, it has a cross-sectional shape bent at a substantially right angle with the two flat plate portions as a boundary, the front flat plate portion 87a is attached in a substantially downward form, and the rear flat plate portion 87b is attached in a substantially horizontal form. The rotating member 87 has a seesaw structure and has a function of converting a horizontal force into a vertical direction.

The tip end portion 87b1 of the rear side flat plate portion 87b is formed in a shape that is lowered by one step, and the interlocking member 88 is inserted therein. In addition, a rotating shaft 87c is integrally provided in the vicinity of the root of the rear flat plate portion 87b so as to project in the left-right direction. And the front-end | tip part 87b1 of the back side flat plate part 87b is inserted in the interlocking member 88 inserted under the roof part 86b of the storage casing 86, and the rotating shaft 87c is inserted in the bearing groove 86a of the storage casing 86. It is fitted and pivotally supported.

  The interlocking member 88 is a resin member having a frame body 88a and a valve pressing projection 88b, and the frame body 88a is a portion having a B-shape at the center and having a B-shaped through-hole 88a1, and the through-hole 88a1. The tip end portion 87b1 of the rotating member 87 is inserted into the inside. The width of the frame 88a is slightly shorter than the sliding groove 86c of the storage casing 86, and the whole is inserted into the sliding groove 86c.

  Further, the valve pressing projection 88b is integrally provided so as to hang from the lower end of the frame body 88a, and when the frame body 88a is inserted into the sliding groove 86c of the storage casing 86, it is shown in FIG. In this manner, the storage casing 86 protrudes downward.

  The spring 89 is a coil spring having a circular portion 89a at the center as shown in FIG. 4, a U-shaped portion 89b at one end, and an L-shaped portion 89c at the other end, and the circular portion 89a as a rotating member as shown in FIG. 87, the U-shaped portion 89b is locked to the upper surface of the rear flat plate portion 87b of the rotating member 87, and the L-shaped portion 89c is locked to the front wall 85a of the storage casing 86. As a result, the spring 89 is mounted with a displacement in the rewinding direction, and the rotating member 87 is imparted with a clockwise rotation with respect to the storage casing 86. That is, the valve pressing protrusion 88b is always pressed to the lowest position. In this case, the downward movement of the rotation member 87 is restricted by the upper circular end on the rear side of the storage casing 86, and the upward movement of the rotation member 87 is restricted by the lower end of the roof portion 86 b of the storage casing 86.

  The attachment of the rotating member unit 85 will be described. First, the storage casing 86 is placed in the reverse direction, and the interlocking member 88 is inserted into the sliding groove 86c of the storage casing 86 so that the valve pressing projection 88b faces upward.

  Next, the rotating member unit 85 is erected, and the distal end portion 87b1 of the rotating member 87 is pushed below the roof portion 86b while moving the interlocking member 88 with a finger, and the distal end portion 87b1 is inserted into the through-hole 88a1 of the interlocking member 88. Insert inside. In that case, the circular portion 89a of the spring 89 is inserted into the rotating shaft 87c of the rotating member 87, and the U-shaped portion 89b is locked to the upper surface of the rear side flat plate portion 87b.

Next, the rotation shaft 87 c of the rotation member 87 is fitted into the bearing groove 86 a (see FIG. 5 ) of the storage casing 86. As a result, the rotating member unit 85 shown in FIGS. 5 and 6 is completed. The assembled turning member unit 85 is screwed onto the second valve cover 60b as shown in FIG. 2 by screwing screws through screw holes 86d1 of two mounting flanges 86d formed on the side wall surface of the storage casing 86. Fixed to.

When the rotating member unit 85 is fixed on the second valve cover 60 b, the front side flat plate portion 87 a of the rotating member 87 is inserted between the rear wall surface 78 b of the second sliding member 77 and the spring bar 81. At the same time, as shown in FIG. 9, when the second solenoid 75 is off, the second plunger 76 protrudes rearward and moves the front flat plate portion 87 a of the rotating member 87 rearward through the rear wall surface 78 b of the second sliding member 77. To the side, the rotating member 87 is rotated counterclockwise. As a result, the valve pressing protrusion 88b is pulled upward from the second spherical valve 102 described later. The spring bar 81 is a kind of elastic member, and when a sudden force is applied to the rotating member 87 from the second solenoid 75 side or the valve pressing projection 88b side, the force can be absorbed and relieved. The spring 89 is set weaker than the coil spring 76b.

Then, as shown in FIG. 10, when the second solenoid 75 is turned on, the second plunger 76 is pulled forward to move the second sliding member 77 forward. Then, the front flat plate portion 87a of the rotating member 87 is pushed forward by the spring bar 81, and the entire rotating member 87 is given a clockwise spring force by the spring 89. The valve pressing protrusion 88b rotates the second spherical valve 102, which will be described later, from above and further increases the force with which the second spherical valve 102 opens.

  A circular opening (not shown) is provided on the front side surface of the first valve cover 60a having a high height provided at the center of the lid lower member 42, and the opening has a fitting groove 62a around the opening. As a whole, a circular packing 62 (see FIG. 3) having a circular sealing film 62b is fitted therein, and seals the inside and outside of the first valve cover 60a. The valve pressing protrusion 73b of the first sliding member 70 is fitted in the center of the circular sealing film 62b of the packing 62, and the circular sealing film 62b moves in the front-rear direction together with the valve pressing protrusion 73b. To do.

  A circular opening 60b1 (see FIG. 9) is provided on the upper surface of the second valve cover 60b having a low height provided at the center of the lid lower member 42, and a fitting groove 90a is formed around the opening 60b1. A circular packing 90 (see FIG. 4) as a whole having a circular sealing film 90b is fitted therein and seals the inside and outside of the second valve cover 60b. A valve pressing protrusion 88b provided at the lower end of the frame body 88a is fitted in the center of the circular sealing film 90b of the packing 90, and the circular sealing film 90b is vertically moved together with the valve pressing protrusion 88b. Moving.

  An inner lid 91 is detachably attached to the lower side of the lid 40 so as to face the inner pot 23. A valve unit 92 is attached to the upper surface of the inner lid 91 in a form located below the valve cover 60. When the inner lid 91 is attached to the lower surface of the lid lower member 42, a steam chamber 93 (see FIG. 1) is formed between the upper surface of the valve unit 92 and the lower surface of the first valve cover 60a.

  The valve unit 92 is provided with a first valve storage chamber 94, a second valve storage chamber 95, and a safety valve 96 as required.

  The first valve storage chamber 94 is an inverted U-shaped section having an opening 94a in the front-rear direction, and a mortar-shaped first valve mounting portion 98 having a first vent hole 97 in the center therein (FIG. 1 and 3), and a first spherical valve 99, which is a valve body, is disposed above the first spherical valve 99.

  The first vent hole 97 communicates with the inner pot 23. When the first spherical valve 99 opens the first vent hole 97, the steam in the inner pot 23 flows into the steam chamber 93, and then the steam. It is discharged to the outside through a steam port provided on the upper surface of the lid upper member through a steam passage provided in the discharge cylinder 44 and the lid upper member.

  When the inner lid 91 is inserted into the lower surface of the lid lower member 42, the first valve storage chamber 94 enters the first valve cover 60 a formed so as to protrude upward from the lower surface of the lid lower member 42. At the same time, the first spherical valve 99 is positioned to face the valve pressing protrusion 73b.

  The second valve storage chamber 95 is an inverted U-shaped section having an opening 95a in the upper direction, and a mortar-shaped second valve mounting portion 101 (second mortar-shaped valve mounting portion 101 having a second vent hole 100 in the center is provided inside the second valve storage chamber 95. 3) is provided, and a second spherical valve 102, which is a valve body, is disposed above the second spherical valve 102. The second valve storage chamber 95, the second valve mounting portion 101, and the second spherical valve 102 are smaller and lighter than the first valve storage chamber 94, the first valve mounting portion 98, and the first spherical valve 99. It is done.

  The second vent hole 100 is also communicated with the inner pot 23. When the second spherical valve 102 opens the second vent hole 100, the steam in the inner pot 23 similarly flows into the steam chamber 93, and then The steam is discharged to the outside from a steam port provided on the upper surface of the lid upper member through a steam passage provided in the steam discharge cylinder 44 and the lid upper member.

  Then, when the inner lid 91 is inserted into the lower surface of the lid lower member 42, the second valve storage chamber 95 enters the second valve cover 60b formed so as to protrude upward from the lower surface of the lid lower member 42. In addition, the second spherical valve 102 is positioned to face the valve pressing protrusion 88b.

  The first pressure adjusting device includes the first solenoid 68, the first plunger 69, the first sliding member 70, and the first spherical valve 99, and the first solenoid 68 that does not select pressurized rice cooking is not activated (off). Sometimes, the first plunger 69 is pushed outward, and the first spherical valve 99 is pushed to open the first vent hole 97 (non-pressurized rice cooking described later).

  When the first solenoid 68 for which pressurized rice cooking is selected is activated (turned on), the first plunger 69 is pulled in and the valve pressing projection 73b is separated from the first spherical valve 99, so the first spherical valve 99 is under its own weight. The first vent hole 97 is closed by moving directly above the first vent hole 97.

  As a result, rice cooking is performed at a pressure corresponding to the weight of the first spherical valve 99, and when the pressure in the inner pot 23 is higher than that, excess steam pushes up the first spherical valve 99 and from the first vent hole 97. It is discharged (high pressure cooked rice described later). The opening pressure of the heavy first bulb valve 99 is set to, for example, 1.25 atm. When the vapor pressure reaches that pressure, the opening pressure is raised to open the first vent hole 97.

  The second pressure adjusting device includes the second solenoid 75, the second plunger 76, the second sliding member 77, the rotating member 87, and the second spherical valve 102, and the second solenoid 75 that does not select pressurized rice cooking. At the time of non-operation (off), the second plunger 76 is pushed outward, the turning member 87 is turned counterclockwise, and the valve pressing projection 88b is positioned above the second spherical valve 102.

  As a result, the second vent hole 100 is closed by the weight of the second spherical valve 102 (non-pressurized rice cooking or low-pressure rice cooking described later). Note that the opening pressure of the second spherical valve 102 having a light weight is set to, for example, 1.05 atm. When the vapor pressure reaches that pressure, the opening pressure is raised to open the second vent hole 100.

  When pressurized rice cooking is selected, the second solenoid 75 is activated (turned on), the second plunger 76 is retracted, the rotating member 87 is rotated clockwise, and the valve pressing protrusion 88b is the second spherical valve. 102 is pressed from above.

  As a result, the second vent hole 100 is closed by the weight of the second spherical valve 102 and the pressing force from above. The opening pressure of the second spherical valve 102 to be pressed is set to be greater than, for example, 1.25 atm. When the vapor pressure reaches that pressure, the opening pressure is raised to open the first vent hole 97.

  In this case, when the pressed second spherical valve 102 is opened, for example, the first spherical valve 99 is abnormally closed and is set to function as a safety valve.

  The safety valve 96 is opened at a pressure higher than the opening pressure of the pressed second spherical valve 102, for example, a pressure of 1.30 atm or more, and the first spherical valve 99 and the second spherical valve 102 are opened. It is opened in the event of further abnormalities such as no.

  A liquid crystal panel (not shown) and various switch buttons (not shown) are provided on the front side of the lid 40, and normal rice (non-pressurized rice), low-pressure rice and high-pressure rice are set in the menu. If non-pressurized rice cooking is selected, the first solenoid 68 is off (the first vent hole 97 is open) and the second solenoid 75 is off (the second vent hole 100 is closed by the weight of the second spherical valve 102). When the low pressure rice cooking is selected, the first solenoid 68 is on (the first vent hole 97 is closed) and the second solenoid 75 is off (the second vent hole 100 is the weight of the second spherical valve 102). When the high pressure rice cooking is selected, the first solenoid 68 is turned on (the first vent hole 97 is closed) and the second solenoid 75 is turned on (the second vent hole 100 is the second spherical shape). Rice cooks under the weight of valve 102 and closed by pressing force from above It is.

  At the time of high pressure rice cooking, when the pressure in the inner pot 23 becomes 1.25 atm, the first spherical valve 99 opens the first vent hole 97 so that the pressure in the inner pot 23 does not exceed 1.25 atm. . If the pressure does not cause the first spherical valve 99 to open the first vent hole 97 (that is, when there is an abnormality) and the pressure in the inner pot 23 becomes 1.30 atm or higher, the second spherical valve is in a pressed state. 102 is pushed up, and the second vent hole 100 is opened.

  The rice cooking is performed by controlling the energization amount to the bottom work coil 27 and the side work coil 28 by a control circuit provided on the control board 32 or the like.

  The non-pressurized rice cooking will be described. When non-pressurized rice cooking is selected, the first solenoid 68 and the second solenoid 75 are turned off. When the first solenoid 68 is turned off, the first plunger 69 is pushed rearward together with the first sliding member 70, and the valve pressing projection 73b of the first sliding member 70 is moved horizontally in the first spherical valve 99. Push to open the first vent 97.

  When the second solenoid 75 is turned off, the second plunger 76 pushes the turning member 87 and turns counterclockwise, pulling the valve pressing projection 88b of the interlocking member 88 upward from the second spherical valve 102, The force for closing the second vent hole 100 is set to the weight of the second spherical valve 102 only. As a result, the inside of the inner pot 23 is always communicated with the atmosphere via the first vent hole 97.

  The low pressure rice cooking time is demonstrated. When low pressure rice cooking is selected, the first solenoid 68 is turned on and the second solenoid 75 is turned off. When the first solenoid 68 is turned on, the first plunger 69 is pulled forward together with the first sliding member 70, and the valve pressing projection 73 b of the first sliding member 70 is separated from the first spherical valve 99, One vent hole 97 is closed by a first spherical valve 99.

  When the second solenoid 75 is turned off, the second plunger 76 pushes the turning member 87 and turns counterclockwise, pulling the valve pressing projection 88b of the interlocking member 88 upward from the second spherical valve 102, The force for closing the second vent hole 100 is set to the weight of the second spherical valve 102 only.

  As a result, when the pressure in the inner pot 23 becomes 1.05 atm or more, the second spherical valve 102 is lifted, the second vent hole 100 is opened and excess steam is discharged, and the inside of the inner pot 23 is near 1.05 atm. Adjust the pressure to.

  The high pressure rice cooking time is demonstrated. When high pressure rice is selected, the first solenoid 68 and the second solenoid 75 are turned on. When the first solenoid 68 is turned on, the first plunger 69 is pulled forward together with the first sliding member 70, and the valve pressing projection 73 b of the first sliding member 70 is separated from the first spherical valve 99, One vent hole 97 is closed by a first spherical valve 99.

  When the second solenoid 75 is turned on, the second plunger 76 is pulled forward together with the second sliding member 77, and the rotating member 87 is rotated clockwise by the action of the spring bar 81 and the spring 89. Then, the valve pressing projection 88b presses the second spherical valve 102 from above.

  As a result, when the pressure in the inner pot 23 becomes 1.25 atm or more, the first spherical valve 99 is lifted, the first vent hole 97 is opened and excess steam is discharged, and the inside of the inner pot 23 is near 1.25 atm. Adjust the pressure to. In this way, the first pressure adjusting device and the second pressure adjusting device are separately made to operate differently to perform multi-stage pressure adjustment.

  Note that when the first spherical valve 99 does not open the first vent hole 97 and the pressure in the inner pot 23 becomes 1.30 atm or higher, the second spherical valve 102 in the pressed state is pushed up and the second The vent hole 100 is opened. In this case, the second solenoid 75 is in the on state, and both the second plunger 76 and the second sliding member 77 are pulled forward, but the rotating member 87 is engaged via the spring bar 81. When a pressure of 1.30 atm or more is applied to the lower part of the second spherical valve 102, the rotating member 87 can be rotated counterclockwise by pushing and extending the spring bar 81 rearward. The two-spherical valve 102 is pushed upward together with the valve pressing projection 88b to open the second vent hole 100.

  Further, when a further abnormal state occurs in which the first spherical valve 99 does not open the first vent hole 97 and the second spherical valve 102 does not open the second vent hole 100, the safety valve 96 is provided. Abnormalities can be avoided. In any case, by ensuring that the second spherical valve 102 in the pressed state functions as a safety valve, and further by allowing the safety valve 96 to function as a second safety valve, the safety of the pressure rice cooker can be ensured more reliably. Will be able to.

  FIG. 8 shows the relationship between the first spherical valve 99 and the first vent hole 97 when the first solenoid 68 serving as the first pressure adjusting device is turned on and off, and the other action of the first sliding member 70, that is, during pressurized rice cooking. Next, a description will be given of the operation of discharging the steam before the lid 40 is opened when the lid 40 is opened.

  The figure (A) is the time of the locked state which is not performing pressure rice cooking. In this state, the first solenoid 68 is in an off state, the first plunger 69 and the first sliding member 70 are pushed backward, and the valve pressing projection 73b pushes the first spherical valve 99 to the first vent hole. 97 is open. The coil spring 74 is set weaker than the coil spring 69b.

  FIG. (B) shows a locked state during pressurized rice cooking. In this state, the first solenoid 68 is in the ON state, the first plunger 69 and the first sliding member 70 are pulled forward, and the valve pressing projection 73b is separated from the first spherical valve 99, and as a result, One vent hole 97 is closed.

  Drawing (C)-(E) shows opening operation in pressure rice cooking in order. As shown in FIG. 3C, when the lock lever 50 is rotated clockwise, which is the opening direction, the bent portion 53 of the lock lever 50 comes into contact with the inclined protrusion 71a. When the lock lever 50 is further rotated in the opening direction, the bent portion 53 of the lock lever 50 presses the inclined protrusion 71a rearward. Then, the first sliding member 70 is pushed rearward against the coil spring 74, and the valve pressing projection 73b of the first sliding member 70 pushes the first spherical valve 99 to the state shown in FIG. In this case, since the first solenoid 68 is in the ON state, the first plunger 69 remains pulled forward.

  In the state shown in FIG. (D), the steam in the inner pot 23 is discharged. For this reason, even when the lid 40 is opened as shown in FIG. (E), the high-pressure steam inside has already been ejected, so that no steam is ejected when the lid 40 is opened. Thus, the convenience of a pressure-type rice cooker can be improved more by using the 1st sliding member 70 as a means for discharging | emitting steam in the middle of the opening operation | movement during pressure rice cooking.

  And the 2nd pressure regulation apparatus of this invention is 4 members, the 2nd sliding member 77, the spring bar 81, the rotation member 87, and the interlocking member 88, and can reduce a number of parts from the said conventional thing. In addition, since the rotating member 87 is used, the force can be transmitted smoothly, and as a result, the convenience of the pressure rice cooker can be enhanced. In addition, since it is not necessary to provide a safety valve, the number of parts can be further reduced.

  The present invention is not limited to the configuration of the embodiment described above, and can be appropriately changed in design without departing from the gist of the invention. For example, the heating means may be a heater, and the inner pot is made of metal. The set pressure of the first spherical valve 99 and the second spherical valve 102 may be other than the above values.

DESCRIPTION OF SYMBOLS 20 ... Pressure type rice cooker 21 ... Rice cooker main body 22 ... Outer case 23 ... Inner pan 24 ... Inner case 25 ... Temperature sensor 26 ... Shoulder member 26a ... Locking piece 27 ... Bottom work coil 28 ... Side work coil 29 ... Coil Support base 31 ... Bottom member 32 ... Control board 33 ... Cooling fin 34 ... Cooling fan 35 ... Cord winder 40 ... Cover body 42 ... Under lid member 43 ... Notch 44 ... Vapor discharge tube 46 ... Reinforcement member 46a ... First reinforcement Member 46b ... 2nd reinforcement member 47, 48 ... Bearing hole 50 ... Lock lever 51 ... Horizontal part 51a ... 1st horizontal part 51b ... 2nd horizontal part 51c ... 3rd horizontal part 52 ... Vertical part 52a ... Locking part 53 ... Bending portion 55 ... Pressing member 55a ... Insertion port 56 ... Locking port 57 ... Lever shaft 57a ... Lever spring 58 ... Hinge shaft 59 ... Hinge spring 60 ... Valve cover 60a ... First valve cover 60b 2nd valve cover 62 ... Packing 63 ... Supporting member 63a ... Flange 64 ... 1st solenoid storage chamber 65 ... 1st sliding member storage chamber 65a ... Inner end wall surface 66 ... 2nd solenoid storage chamber 67 ... 2nd sliding member storage Chamber 68 ... 1st solenoid 69 ... 1st plunger 69a ... Spring support 70 ... 1st sliding member 71 ... Longitudinal elongate part 71a ... Inclined protrusion 71b ... Front side hanging part 71c ... Back side hanging part 72 ... Front and back Directional short extension 73 ... Short horizontal extension 73a ... Semi-circular space 73b ... Valve pressing projection 74 ... Coil spring 75 ... Second solenoid 76 ... Second plunger 76a ... Spring support 77 ... Second sliding member 78 ... Left / right Direction extension part 78a ... Semi-circular groove space 78b ... Back wall 79 ... Front and rear direction extension part 80 ... Cylindrical protrusion 80a ... Spring groove 81 ... Spring bar 85 ... Rotating member unit 86 ... Storage box Sing 86a ... bearing groove 86b ... roof part 86c ... sliding groove 86d ... mounting flange 87 ... rotating member 87a ... front side flat plate part 87b ... rear side flat plate part 87b1 ... tip end part 87c ... rotating shaft 88 ... interlocking member 88a ... Frame body 88a1 ... Through port 88b ... Valve pressing member 89 ... Spring 90 ... Packing 91 ... Inner lid 92 ... Valve unit 93 ... Steam chamber 94 ... First valve storage chamber 95 ... Second valve storage chamber 96 ... Safety valve 97 ... First Vent hole 98 ... first valve mounting part 99 ... first spherical valve 100 ... second vent hole 101 ... second valve mounting part 102 ... second spherical valve

Claims (2)

It is a pressure rice cooker capable of non-pressurized rice, low pressure rice and high pressure rice having a rice cooker body and a lid positioned above the rice cooker body,
The rice cooker body has an inner pot and heating means for heating the inner pot,
The lid includes a first pressure adjusting device and a second pressure adjusting device,
The first pressure adjusting device has a spherical first valve body that opens and closes the first vent hole,
The second pressure adjusting device has a spherical second valve body that opens and closes the second vent hole,
The first valve body opens and closes the first vent hole by being pressed in the horizontal direction,
The second valve body functions as a safety valve by increasing the closing force with respect to the second vent hole by being pressed in the vertical direction via the rotating member ,
During the non-pressurized rice cooking, the first valve body opens the first vent hole, the second valve body closes the second vent hole in a state where it is not pressed,
During the low pressure rice cooking, the first valve body closes the first vent hole, the second valve body closes the second vent hole in a state where it is not pressed,
At the time of the high pressure rice cooking, the first valve body closes the first vent hole, and the second valve body closes the second vent hole in a pressed state . . A pressure rice cooker having a rice cooker body and a lid located above the rice cooker body,
The rice cooker body has an inner pot and heating means for heating the inner pot,
The lid includes a first pressure adjusting device and a second pressure adjusting device,
The first pressure adjusting device has a spherical first valve body that opens and closes the first vent hole,
The second pressure adjusting device has a spherical second valve body that opens and closes the second vent hole, a plunger, an elastic member, and a rotating member that presses the second valve body in a vertical direction,
The plunger and the rotating member are interlocked via the elastic member,
The first valve body opens and closes the first vent hole by being pressed in the horizontal direction,
The second valve body closes the second vent hole only by its own weight when the plunger is not operated, and is pressed in the vertical direction via the rotating member when the plunger is operated. It functions as a safety valve by increasing the closing force on the vents,
When the internal pressure is abnormal, the elastic member is deformed to allow rotation of the rotating member in a direction to reduce the closing force.

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