JP4884317B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker, and more particularly to a rice cooker equipped with a vibration device that vibrates an inner pot filled with rice or water.

  Electric rice cooker starts cooking rice according to the control program set in the control unit when the rice cooker and water are put in the rice cooker body, the lid is closed and the rice cooker is turned on. As shown in FIG. 22, first, the cooking process is finished through the preheating process, the rice cooking process, and finally the unevenness process, and the process proceeds to the heat retaining process. The preheating process takes about 15 to 20 minutes, the water temperature is raised to about 60 ° C, and then the temperature is controlled at a constant temperature. The sugar is absorbed by the rice and the action of saccharifying enzyme. Has the effect of increasing

  Next, the rice cooking process is started. In the rice cooking process, the heating power is increased to bring the water to a boiling state, and boiling is continued until there is no water in the inner pot. When the water in the inner pot disappears, the heat previously consumed by the latent heat of vaporization of water is used to raise the pot temperature, and the pot temperature rises rapidly. This is called dry-up, this temperature rise is detected by a temperature sensor provided at the bottom of the pot, the rice cooking process is terminated, and then the unevenness process starts. Then, after unevenness for about 10 to 15 minutes, rice cooking is finished and the process proceeds to a heat retaining step. In each of the above steps, thermal power control is performed by a microcomputer program so as to realize optimal fire control.

  In order to make starch into alpha rice in the rice cooking process and make it delicious rice, it is important that water penetrates enough to the core of the rice, and if it enters the rice cooking process, the surface of the rice will gelatinize Water absorption into the rice becomes difficult. Therefore, it is important to sufficiently absorb water up to the core of the rice in the preheating process. That is, the deliciousness varies depending on the water absorption in the preheating process. In addition, temperature unevenness in the inner pot in the preheating process is also an element relating to the deliciousness.

  The saccharifying enzyme during the preheating process produces sugar, which is a component of the delicious taste of rice. The temperature range in which this saccharifying enzyme works best is about 40 ° C to 60 ° C. The temperature is 55 ° C to 60 ° C, and the enzyme is said to be inactivated when the temperature exceeds 60 ° C. If the temperature unevenness is large, the time spent in this temperature range varies depending on the location in the inner pot. As a result, the sweetness may vary depending on the location, and in some cases the location may exceed 60 ° C. As a result, a portion with a low sugar content was produced, and as a whole, the rice had a low sugar content. In other words, it can be seen that by suppressing temperature unevenness in the preheating process as much as possible, the saccharification enzyme works sufficiently in any part of the inner pot and cooks delicious rice as a whole.

  From the above, it can be seen that the enhancement of water absorption and the suppression of temperature unevenness in the preheating step are important factors for cooking delicious rice. In order to improve such a problem, it is known that an effect is acquired by giving a vibration to a rice cooker in a preheating process.

  As means for vibrating the rice cooker, there are an ultrasonic vibration device using an ultrasonic vibrator and a low-frequency vibration device using an eccentric motor. The ultrasonic vibration device has a problem that the element and the power supply unit for driving the element are expensive and expensive. In addition, the low-frequency vibration device has an advantage that an eccentric motor and a power supply unit for vibration can be realized at low cost, and a large amplitude can be obtained with small electric power, as compared with the case of an ultrasonic vibration device.

  However, in the case of a low-frequency vibration device using an eccentric motor, there is a problem that the life of the eccentric motor is short. In general, the life of an eccentric motor is several hundred hours, and when the life of a rice cooker is designed to be 10 years, it is considered that there is no life. If the same performance can be obtained, a product that can be manufactured at a lower cost can be provided to consumers at a lower cost. This is especially important for products such as rice cookers. It is desirable to overcome the drawbacks of low frequency vibration devices that have been installed and to install them in rice cookers.

  In the rice cooker equipped with the conventional vibration device, an ultrasonic oscillator that applies vibration to the inner pot in the water absorption process at the time of rice cooking is arranged through a fixed plate at the center of the inner surface of the bottom member constituting the bottom of the rice cooker body. Attach a vibration transmitter between the ultrasonic oscillator and the bottom plate of the inner pan to transmit the vibration generated by the ultrasonic oscillator to the bottom of the inner pan, penetrating the bottom of the electromagnetic induction coil and inner case There is one in which vibration is applied to the inner pot to increase the water absorption rate by shortening the time required for water absorption of rice in the water absorption process during rice cooking (for example, see Patent Document 1).

JP 2000-23840 (page 2-4, FIG. 7)

In the rice cooker of Patent Document 1, the inner pot is vibrated by the ultrasonic oscillator using the ultrasonic vibrator. As described above, the ultrasonic vibration device drives the ultrasonic vibration element and the ultrasonic vibration element. A rice cooker that can cook delicious rice with rice that is sufficiently water-absorbed by vibration, because both the ultrasonic vibration element and the DC power supply are expensive for the cost of the rice cooker There was a problem that could not be provided at a low price.
Further, since the operation by the ultrasonic vibration device has a high frequency and a small amplitude, it is difficult to confirm by visual observation or bodily sensation.

  The present invention has been made to solve the above problems, and by giving mechanical vibration due to low frequency current to the inner pot of the rice cooker, it is possible to cook delicious rice with a simple structure and low cost. The purpose is to provide a rice cooker.

The rice cooker according to the present invention includes an inner pot in which a food is put, a rice cooker body in which the inner pot is detachably accommodated, heating means for the inner pot, and an inner pot support case of the rice cooker body . comprising a vibrating device for vibrating said internal pot attached to the lower surface of the supporter, and a controller for controlling the heating means and vibrating device, and a lid for opening and closing the opening of the rice cooker body, wherein A vibrating member, an electromagnet driven by a low-frequency current, a connecting member made of a magnetic material, having a permanent magnet facing the iron core of the electromagnet at the upper end, and a support plate provided near the center in the vertical direction, A vibration mechanism portion made of a non-magnetic material between the electromagnet and the support plate of the connecting member and interposed between the electromagnet and the lower portion of the support plate and made of first and second elastic bodies; A storage part having an attachment arm attached to the supporter on the outer periphery of the upper end part, and the lower part of the storage part Consists topped upper lid having a mounting portion in alignment with the mounting portion of the paid portion, it said those constituted by the case vibration mechanism is accommodated.

  According to the present invention, in the preheating process of cooking rice, since the inner kettle is mechanically vibrated by a vibration device having a simple structure driven by a low-frequency current, delicious rice can be cooked at low cost. Moreover, since vibration can be confirmed visually or by a bodily sensation, an easy-to-use rice cooker can be obtained.

[Embodiment 1]
1 is a longitudinal sectional view of a rice cooker according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of FIG.
The rice cooker according to the present embodiment includes a main body case 2, a supporter 4 provided on the outer periphery of the upper end portion, and a substantially cylindrical inner pot support case 3 installed in the main body case 2 with a gap therebetween, and an inner pot support A rice cooker body 1 having a substantially deep dish-like coil base 6 provided at the lower portion of the case 3 and provided with an induction heating coil 7 as a heating means on the lower surface and the corner portion, and an inner lid 9a. , A removably mounted inner lid 9b, a cartridge 10 having a steam outlet, etc., one end of which is mounted on the rear side (right side in the figure) of the rice cooker body 1 via the hinge portion 11, A lid 8 that opens and closes the opening of the main body 1, and a flange 16 on the outer periphery of the upper end, and is detachable from an inner pot accommodating portion formed by the inner pot support case 3 and the coil base 6 of the rice cooker main body 1. The flange 16 is supported by the inner hook support case 3 It is made from the inner hook 15 which is engaged with the 4. In addition, 12 is a handle | steering-wheel provided in the rice cooker main body 1 so that rotation was possible.

  Reference numeral 17 denotes a temperature sensor installed at the central portion of the coil base 6 and is located in contact with or close to the bottom when the inner hook 15 is received in the inner hook receiving portion. Reference numeral 18 includes a power switch, a rice cooker switch, a menu switch, a switch for a vibration device described later, an operation unit provided on the front side (left side of the figure) of the rice cooker body 1, and 19 a coil on which a microcomputer is mounted. A control unit 20 installed on the lower front side of the base 6 is a power cord. Although not shown, a blower for cooling the heat generating parts such as the induction heating coil 7 and the control part 19 is provided in the vicinity of the control part 19.

  Reference numerals 21 denote support legs provided at four locations on the bottom surface of the bottom of the rice cooker body 1, and elastic legs 22 made of an elastic material are attached to the bottom surfaces thereof. The elastic legs 22 may be provided at the center of the support legs 21, but as shown in FIG. 3, if provided on the diagonal line outside the center, the bottom of the rice cooker body 1 warps due to thermal deformation or the like. In this case, the rice cooker can be supported more stably because it is in contact with the floor surface.

30 is a vibration device which is a vibration means of the inner hook 15 attached to the lower surface of the supporter 4 of the inner hook support case 3, and details thereof are shown in FIGS.
The vibration device 30 includes a vibration mechanism unit 31 and a case 45 in which the vibration mechanism unit 31 is accommodated. As shown in the exploded perspective views of FIGS. 5 and 6, the vibration mechanism unit 31 includes an electromagnet 32, a connecting member 36, and first and second spring members 40 a and 40 b that are elastic bodies.

  The electromagnet 32 includes an iron core 33 having an upper end formed in a large diameter, and an excitation coil 35 wound around a bobbin 34 around the iron core 33, and the iron core 33 is held by an upper plate of the bobbin 34.

  The connecting member 36 is made of a magnetic material such as iron, and is integrally formed with a cylindrical main body portion 37 that is shorter than the total length of the natural lengths of the first and second spring members 40a and 40b, and substantially at the center in the vertical direction. A permanent magnet 39 is attached to the upper end portion of the main body portion 37. The permanent magnet 39 may be attached to the main body portion 37 only by a magnetic force, or may be attached using an adhesive or a double-sided tape. As shown in FIG. 7, a concave portion 37a may be provided at the upper end portion of the main body portion 37, and the lower portion of the permanent magnet 39 may be inserted and attached to the concave portion 37a, thereby preventing the horizontal displacement of the permanent magnet 39. can do.

  The first and second spring members 40a and 40b, which are elastic bodies, are formed in a conical and coiled shape by a nonmagnetic material such as nonmagnetic stainless steel or phosphor bronze, and the small diameter side thereof is a connecting member 36. The outer diameter of the support plate 38 is smaller than the outer diameter, and the larger diameter side is formed substantially equal to the outer diameter of the bobbin 24 of the electromagnet 32.

  The case 45 is made of, for example, a synthetic resin molded product, and has a ceiling and cylindrical storage portion 46 in which the vibration mechanism portion 31 is stored, and screw mounting holes 48 provided on both sides of the upper end portion of the storage portion 46. It consists of an arm 47 and a lid 49 that closes the lower opening. Reference numeral 50 denotes a lead wire outlet provided in the upper portion of the storage portion 46 and from which a lead wire (not shown) of the exciting coil 25 of the stored electromagnet 35 is drawn.

  To assemble the vibration device 30 as described above, first, the electromagnet 32 is inserted into the housing portion 46 from the lower opening of the case 45, and the lead wire of the exciting coil 35 is pulled out from the lead wire outlet 50. Next, the first spring member 40 a is inserted into the storage portion 46 with the large diameter portion first, and the large diameter portion is brought into contact with the lower surface of the electromagnet 32. Next, the connecting member 36 is inserted into the first spring member 40a with the permanent magnet 39 first, and the support plate 38 is brought into contact with the small diameter portion of the first spring member 40a. Next, the second spring member 40 b is fitted into the connecting member 36 with the small diameter portion first, and is inserted into the storage portion 36, and the small diameter portion is brought into contact with the support plate 38.

  In this state, the vertical natural length (height) obtained by combining the electromagnet 32, the connecting member 36, and the first and second spring members 40a and 40b is the length (depth) of the storage portion 46 of the case 45. ) Is longer, the lower portion of the second spring member 40 b is exposed from the opening of the case 45.

  Next, the lid 49 is brought into contact with the large diameter portion of the second spring member 40b and pushed into the accommodating portion 46, and the lid 49 is joined by, for example, ultrasonic welding to close the opening. Instead of welding, the opening may be closed by other means such as providing a female screw at the lower portion of the storage portion 46 of the case 45 and screwing a male screw provided on the lid 49. This completes the assembly.

  At this time, the first and second spring members 40 a and 40 b are compressed and biased, the upper surface of the electromagnet 32 is pressed against the top plate of the case 45, and the large diameter portion of the second spring member 40 b is attached to the lid 49. The vibration exciting mechanism 31 is fixed in the case 45 by pressure bonding. The connecting member 36 is supported by the first and second spring members 40a and 40b, and the permanent magnet 39 provided at the upper end thereof opposes the iron core 33 of the electromagnet 32 with a predetermined gap therebetween, and the lower end portion. A predetermined gap is formed between the lid 49 and the lid 49 so as to float. In the above description, the first to second spring members 40a and 40b, which are elastic bodies, are shown as having a conical to coiled spring, but a cylindrical coil spring may be used. .

  When the commercial AC power supply 60 is connected to the excitation coil 35 of the electromagnet 32 and energized in the vibration device 30 configured as described above, as shown in FIG. 8A, as shown in FIG. Since the direction of the current changes according to the AC frequency, the polarity of the iron core 33 excited by this changes alternately according to the AC frequency. At this time, since the permanent magnet 39 attached to the connecting member 36 is positioned facing the iron core 33, the permanent magnet 39 is repeatedly attracted and repelled between the iron core 33 and the polarity of the iron core 33. Along with this, the connecting member 36 moves up and down, and the first and second spring members 40a and 40b engaged with the connecting member 36 repeat compression and extension.

  When the permanent magnet 39 is attracted and the connecting member 36 is raised, the first spring member 40a is compressed and the second spring member 40b is expanded, and the permanent magnet 39 is repelled and the connecting member 36 is lowered. The first spring member 40a expands and the second spring member 40b is compressed. By repeating the up and down movement of the connecting member 36 in this way, the first and second spring members 40a and 40b vibrate smoothly and gently by repeatedly compressing and expanding, and this vibration is generated in the case. 45.

  In this case, as shown in FIG. 6 and FIG. 11 described later, the upper end portion of the iron core 33 is formed with a large diameter, and the large diameter portion is pressed against the top plate of the case 45 when housed in the case 45. Therefore, when the iron core 33 attracts the permanent magnet 39, it does not come out upward. As shown in FIG. 6, if the large diameter portion of the iron core 33 is embedded in the upper plate of the bobbin 34, the planarity of the upper surface of the electromagnet 32 can be further increased. , The stability of the vibration mechanism 31 can be increased.

  As shown in FIGS. 1, 2, and 4, the vibration device 30 as described above abuts the upper surface of the case 45 against the lower surface of the supporter 4 of the inner pot support case 3 of the rice cooker body 1. The screw 55 inserted into the screw insertion hole 48 provided in is inserted into the screw hole 4a provided in the supporter 4 and attached so that the vibration direction is substantially perpendicular to the bottom surface of the rice cooker body 1.

FIG. 9 shows the mounting position of the vibration device 30. In general, rice cookers, when viewed from above, are almost egg-shaped as shown in FIG. 9 (a) or nearly square as shown in FIG. 9 (b).
In the case of the oval shape of FIG. 9 (a), there are a hinge part 11, an inner hook 15 and a control part 19 as large members, but there are space parts 23a to 23d extending in the vertical direction at the corners of the four corners. To do. Further, in the case of the square shape in FIG. 9B, since the control unit is usually provided on the lid, there are a hinge unit 11 and an inner hook 15 as large members, which are also spaces in the corners at the four corners. There exist parts 23a-23d.

  Therefore, the vibration device 30 may be attached to any one of these space portions 23a to 23d. FIG. 2 shows a case where the vibration exciter 30 is attached to the space 23a. Note that the mounting position of the vibration exciter 30 is an example. For example, vibration may be transmitted to the inner hook 15 such as by making a hole in the supporter 4 and directly contacting the inner hook 15. For example, the position is not limited.

Next, an example of the rice cooking effect of the rice cooker according to the present embodiment will be described.
Rice and water as cooking products are put into the inner pot 15 and set in the inner pot accommodating portion, and the lid 8 is closed. At this time, a slight space exists between the bottom of the inner hook 15 and the coil base 6. Next, when the rice cooking switch of the operation unit 18 is turned on, rice cooking is started in accordance with a control program incorporated in the control unit 19. At this time, a commercial alternating current is simultaneously supplied to the vibration device 30 to vibrate the vibration device 30 as described above, and the vibration is transmitted to the inner hook 15 during the preheating process via the supporter 4. 15 is subjected to longitudinal vibration. Thereby, water can be sufficiently absorbed up to the core of the rice, and temperature unevenness in the inner pot 15 can be eliminated.

  When the predetermined time has elapsed and the preheating process is finished, the rice cooking process is started. At this time, the energization to the vibration exciter 30 is stopped. When the rice cooking process is over, the process starts, and when a predetermined time elapses, the process proceeds to the heat retaining process. The controller 19 controls the energization, stop, and preheating process, the rice cooking process, the unevenness process, and the heat-retaining process time and heating power of the vibration exciter 30.

In this case, if an air outflow hole (not shown) is provided in the storage portion 46 of the case 45, the cooling air that has cooled the control unit 19 and the like by the blower flows in the direction of the vibrating device 30 and is stored from the lead wire outlet 50. Since the air flows into the portion 46 and flows out from the air outlet, the electromagnet 32 that is the heat generating portion of the vibration device 30 can be cooled.
Further, since the vibration device 30 is almost sealed, sound leakage caused by vibration of the vibration mechanism section 31 is suppressed, and the user is not uncomfortable.
By cooking rice in this way, the saccharification enzyme works enough to cook delicious rice.

In the above description, the case where the control unit 19 drives the vibration device 30 only during the preheating process to vibrate the inner pot 15 has been shown, but also in the rice cooking process, for example, the vibration device 30 provided in the operation unit 18 The inner hook 15 may be vibrated by operating the switch and driving it appropriately in an intermittent or strong mode. As a result, even when the rice is pulverized and becomes paste-like and does not flow, it can be stirred by applying vibrations, can be heated uniformly, and delicious rice can be cooked.
In addition, during the heat retaining step, the vibrating device 30 is appropriately driven to vibrate the inner pot 15 in the same manner as described above, so that the heat retaining temperature in the inner pot 15 can be made uniform and the deliciousness of the rice can be maintained. it can.

  FIG. 10 shows another example of the driving means of the vibration device 30 of the present embodiment. In this example, as shown in FIG. 10 (a), a rectifier 61 such as a diode is connected in the power supply circuit, and the AC frequency is a half-wave current. As shown in b), the vibrating device 30 is driven by a half-wave alternating current.

  FIG. 11 shows the magnetic force relationship between the iron core 33 of the electromagnet 32, which is the driving means of the vibration device 30 as described above, and the permanent magnet 39, and the plus (+) side of the figure is represented as an attractive force. ing. Here, when a positive current flows through the exciting coil 25, the side facing the permanent magnet 39 of the iron core 33 is the N pole, and the side facing the iron core 33 of the permanent magnet 39 is the S pole. Instead, the side of the iron core 33 facing the permanent magnet 39 may be the south pole, and the side of the permanent magnet 39 facing the iron core 33 may be the north pole.

According to such a driving means, while the AC half-wave current is supplied to the electromagnet 32, the permanent magnet 39 side becomes the N pole (or S pole), and a strong attractive force is generated with respect to the permanent magnet 39. . Further, while the energization to the electromagnet 32 is stopped, a weak attractive force is generated between the iron core 33 and the permanent magnet 39. As a result, by repeating the strong attractive force and the weak attractive force, The vibration device 30 vibrates.
In this way, when the vibration device 30 is driven with a half-wave alternating current, a pause period of the current supplied to the exciting coil 25 occurs, so that the heat generation of the electromagnet 32 can be suppressed and long-time vibration is also hindered. Can be done without.

  In the above description, the case where one vibration device 30 is attached to the rice cooker has been shown. However, the present invention is not limited to this, and a plurality of vibration devices 30 that face each other or are substantially equally spaced in the circumferential direction. May be provided. In this case, it is necessary to vibrate each vibration device 30 in synchronization.

  According to this Embodiment, in the preheating process at the time of rice cooking by the rice cooker, the electromagnet 32 driven by the low frequency current, the connecting member 36 having the permanent magnet 39, and the pair of elastic bodies that support the connecting member 36 40a and 40b, and the vibration generator 30 that generates vibration by repeatedly attracting and repelling between the electromagnet 32 and the permanent magnet 39 is used to give stable vibration to the inner pot 15. Can absorb enough water and cook delicious rice. Moreover, since the vibration of the inner pot 15 can be confirmed by visual observation or bodily sensation without generating abnormal noise, an easy-to-use rice cooker can be obtained.

Further, effective longitudinal vibration is applied to the inner hook 15 to promote convection, and furthermore, rotational movement of water can be caused in the circumferential direction of the inner hook 15, so that the temperature distribution in the inner hook 15 is uniform. And temperature unevenness can be prevented.
Moreover, at the time of a rice cooking process, a tasty rice can be cooked by giving the inner pot 15 with an intermittent or strong vibration etc. suitably with the vibration apparatus 30 as needed. By appropriately applying vibration to the inner pot 15, the deliciousness of the rice can be maintained.

  Further, since the vibration device 30 is driven by a low-frequency current (commercial power supply), the structure is simple and the manufacturing and mounting costs can be reduced. In addition, the vibration device 30 can be used in the space of the rice cooker. Since it can be attached, the main body case 2 is not enlarged.

[Embodiment 2]
FIG. 12 is an exploded perspective view of the vibration generator for a rice cooker according to Embodiment 2 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the first embodiment, the case 45 of the vibration device 30 is provided with an open and cylindrical storage portion 46 having a lower opening and mounting arms 47 provided on both sides of the upper end portion, and a lower opening portion of the storage portion 46. In the present embodiment, the case 49 is constituted by the lid 49 that is closed, but in the present embodiment, the case 45 is constituted by the storage portion 46 and the upper lid 51. The vibration mechanism 31 is the same as that in the first embodiment.

  The storage portion 46 of the case 45 has substantially the same structure as the storage portion 46 of the case 45 of the first embodiment, but has a bottom and an upper portion that is open and has a short axial length. Further, the upper lid 51 has a cylindrical portion 52 having the same shape as the storage portion 46 and shorter than this, and a screw insertion hole 48 at the lower end thereof, and an attachment arm 47a provided facing the attachment arm 47 of the storage portion 46. It is made up of.

  In the present embodiment, contrary to the case of the first embodiment, the second spring member 40b, the connecting member 36, the first spring member 40a, and the electromagnet 32 are sequentially inserted from the upper opening of the storage portion 46. To do. At this time, the upper portion of the electromagnet 32 is exposed from the storage portion 46.

  And as shown in FIG. 13, the upper cover 51 is inserted in the cylindrical attachment part 5 provided in the lower surface of the supporter 4 of the inner pot support case 3 of the rice cooker main body 1, and the electromagnet 32 exposed from the storage part 46 is inserted. The upper portion 51 is inserted into the upper lid 51 to push up the storage portion 46 to compress the upper and lower spring members 40 a and 40 b so that the mounting arm 47 a of the upper lid 51 contacts the lower surface of the mounting portion 24 and the mounting arm 47 of the storage portion 46. Is brought into contact with the mounting arm 47a of the upper lid 51, the screw 55 inserted into the screw insertion hole 48 of both is screwed into the screw hole 4a provided in the mounting portion 5, and the upper lid 51 and the storage portion 46 are tightened together to vibrate the vibration. It is integrally attached to the supporter 4 so that the direction is substantially perpendicular to the bottom surface of the rice cooker body 1.

  In this case, as shown in FIG. 14, for example, a cushioning material 53 made of a rubber-based material may be interposed between the mounting portion 5 of the supporter 4 and the mounting arm 47 a of the upper lid 51. In the vibration device 30, in addition to the vibration caused by the connecting member 36 and the first and second spring members 40 a and 40 b, high-frequency components may be generated. By interposing the buffer material 53 between the mounting portion 5 and the vibration device 30, the high-frequency component can be removed and the vibration device 30 with a quieter sound can be obtained (others). The same applies to examples and other embodiments).

FIG. 15 shows another example of attachment of the vibration exciter 30 according to the present embodiment to the supporter 4. In this example, the attachment part 5 provided on the supporter 4 is inclined downward toward the inner hook 15 side. The vibration device 30 is attached so that the vibration direction is inclined with respect to the bottom surface of the rice cooker body 1. Note that the vibration device 30 of the first embodiment may also be attached to the supporter 4 at an inclination as in this example.
The operation and effects of the present embodiment are almost the same as those of the first embodiment.

[Embodiment 3]
FIG. 16: is sectional drawing of the principal part of the rice cooker which concerns on Embodiment 3 of this invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the present embodiment, the inner hook support case 3 has a different shape from the inner hook support case 3 of the first embodiment, and a cylindrical peripheral wall 3 a is provided between the inner hook support case 3 and the coil base 6. An inner hook storage portion is formed, and a ring-shaped support base 13 is provided at the upper end of the inner hook support case 3. The vibration device 30 was attached to the lower surface of the supporter 4 of the inner hook support case 3.

In this embodiment configured as described above, when the inner hook 15 is accommodated in the inner hook accommodating portion, the flange 16 is supported by the supporter 4 via the support base 13, and between the bottom portion and the coil base 6. A space is formed.
When the vibration device 30 is driven, the longitudinal vibration is transmitted to the inner hook 15 via the supporter 4 and the support base 13, so that the inner hook 15 can be vibrated reliably.

FIG. 17 shows another example of the present embodiment. In this example, as shown in FIG. 17B, a pin 54 is erected on the top plate of the case 45 of the vibration device 30, and As shown in FIG. 17A, the supporter 4 and the support packing 13 are provided with holes 4b and 13a into which the pins 54 are slidably inserted up and down.
When the vibration device 30 is attached to the supporter 4, when the pin 54 is inserted into the holes 4 b and 13 a of the supporter 4 and the support base 13 and the inner hook 15 is stored in the inner hook accommodating portion, the flange 16 is pinned. 54 abuts on or close to 54. Also in the case of the first and second embodiments, a pin 54 is erected on the top plate of the vibration device 30 and a hole through which the pin 54 is inserted is provided in the supporter 4 of the inner hook support case 3. You may make it position the front-end | tip part of the pin 54 penetrated in contact with the flange 16 of the inner hook 15, or adjoining.

In this example, since the vibration of the vibration generator 30 is directly transmitted to the inner hook 15, the vibration effect of the inner hook 15 can be further enhanced.
Other operations and effects of the present embodiment are substantially the same as those of the first embodiment.

[Embodiment 4]
FIG. 18 is a cross-sectional view of a main part of a rice cooker according to Embodiment 4 of the present invention. The same parts as those in the third embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the first to third embodiments, the case where the vibration device 30 is attached to the lower surface of the supporter 4 of the inner hook support case 3 and the inner hook 15 is subjected to standing vibration has been described. In the present embodiment, Below the vibration device 30, a vibration device 30a that applies lateral vibration to the inner hook 15 is attached.

  This vibration device 30a has substantially the same structure as the vibration device 30 of the first and second embodiments. However, as shown in the enlarged view of FIG. Is provided. Further, a through hole 6 b is provided in a skirt portion 6 a provided on the outer periphery of the coil base 6, and a through hole 6 c is provided concentrically with the corner portion of the coil base 6.

  Then, the vibration device 30a is inserted into the through hole 6b of the skirt portion 6a from the outer peripheral side, and the tip end portion is inserted into the through hole 6c of the coil base 6, and a part thereof is exposed in the inner hook housing portion and attached. The arm 47 is fixed to the skirt portion 6a by being fixed almost horizontally.

In the present embodiment configured as described above, when the inner hook 15 is accommodated in the inner hook accommodating portion, the flange 16 is supported by the support base 13 (or the supporter 4), and the lower portion directly contacts the vibration exciter 30a. Therefore, longitudinal vibration can be given to the inner hook 15 by the upper vibration device 30, and lateral vibration can be given to the inner hook 15 by the lower vibration device 30a.
Then, for example, the upper vibration device 30 and the lower vibration device 30a are alternately driven to give longitudinal vibration and lateral vibration to the inner hook 15, thereby further promoting the water absorption of the rice. The temperature inside can be made more uniform. Note that the vibration device 30 may be provided with a pin 54 as shown in FIG. 17B, and the pin 54 may be brought into contact with the inner hook 15.

In the above description, the case where the vibration devices 30, 30a are provided up and down as shown in the drawing is shown, but the upper vibration device 30 is omitted, and the inner vibration is directly applied to the inner hook 15 by the lower vibration device 30a. May be given.
Further, a plurality of vibration devices 30, 30a (or 30a) may be provided to face the upper and lower vibration devices 30, 30a or the lower vibration device 30a or at substantially equal intervals in the circumferential direction. In this case, the upper plurality of vibration devices 30 or the lower plurality of vibration devices 30a need to be driven in synchronization with each other.

Further, also in the present embodiment, the upper vibration device 30 or the lower vibration device 30a is intermittently driven or driven with strength as in the case of the first embodiment. It can be appropriately driven. Note that this embodiment can also be implemented in the first to third embodiments.
Other operations and effects of the present embodiment are substantially the same as those of the first embodiment.

[Embodiment 5]
FIG. 20 is a perspective view of a vibration device for a rice cooker according to Embodiment 5 of the present invention.
As described above, the vibration device 30 according to the present invention is quiet without generating abnormal noise during operation. In the present embodiment, for example, a rubber is provided on the outer periphery of the storage portion 46 of the case 45, for example. A damping material 56 made of a system material is attached. As a result, an extra high frequency component generated in the vibration device 30 can be cut off, and a high frequency component attached to the ear can be cut to obtain a quieter vibration device.

  FIG. 21 is a view in which a vibration damping material 56 made of, for example, a rubber-based material is attached to the surface of the supporter 4 or the rice cooker main body 1 facing the vibration exciting device 30, and the same effect as described above can be obtained. it can.

  In each said embodiment, although the case where this invention was implemented to the illustrated rice cooker was shown, it is not limited to this, This invention can be implemented also to the rice cooker of another structure.

It is sectional drawing of the rice cooker which concerns on Embodiment 1 of this invention. FIG. 2 is a top view of FIG. 1. It is a bottom view of the rice cooker main body of FIG. It is explanatory drawing which shows the attachment state of the vibration apparatus of FIG. It is a disassembled perspective view of the vibration apparatus of FIG. It is a disassembled perspective view of the vibration mechanism part of FIG. It is a perspective view which shows the other example of the connection member of FIG. It is explanatory drawing of the drive means of the vibration apparatus of FIG. It is explanatory drawing of the attachment position of a vibration apparatus. It is explanatory drawing which shows the other example of the drive means of a vibration apparatus. It is explanatory drawing which shows the further another example of the drive means of a vibration exciting apparatus. It is a disassembled perspective view of the vibration apparatus of the rice cooker which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows the attachment state of the vibration apparatus of FIG. It is explanatory drawing which shows the other attachment state of the vibration apparatus of FIG. It is explanatory drawing which shows the other attachment state of the vibration apparatus of FIG. It is a longitudinal cross-sectional view of the principal part of the rice cooker which concerns on Embodiment 3 of this invention. It is the longitudinal cross-sectional view which shows the other example of Embodiment 3, and the perspective view of the principal part. It is a longitudinal cross-sectional view of the principal part of the rice cooker which concerns on Embodiment 4 of this invention. It is an enlarged view of the principal part of FIG. It is a perspective view of the vibration apparatus of the rice cooker which concerns on Embodiment 5 of this invention. It is explanatory drawing at the time of providing a damping material in the rice cooker main body etc. which face a vibration exciting apparatus. It is a rice cooking process figure by a rice cooker.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Rice cooker main body, 3 Inner pot support case, 4 Supporter, 6 Coil stand, 7 Induction heating coil (heating means), 8 Cover body, 13 Support stand, 18 Operation part, 19 Control part, 30, 30a Excitation apparatus ( (Vibrating means), 31 excitation mechanism, 32 electromagnet, 33 iron core, 36 connecting member, 38 support plate, 39 permanent magnet, 40a, 40b spring member (elastic body), 45 case, 47, 47a mounting arm, 53 Buffer material, 54 pins, 56 damping material.

Claims (10)

An inner pot in which the food is put, a rice cooker body in which the inner pot is detachably accommodated, a heating means of the inner pot, and a lower surface of a supporter of the inner pot support case of the rice cooker body. comprising a vibrating device for vibrating the inner hook, and a controller for controlling the heating means and vibrating device, and a lid for opening and closing the opening of the rice cooker main body,
The vibration exciter is an electromagnet driven by a low-frequency current, a connecting member made of a magnetic material, having a permanent magnet facing the iron core of the electromagnet at the upper end, and a support plate provided near the center in the vertical direction A vibration mechanism made of a non-magnetic material between the electromagnet and the connection member support plate and interposed between the electromagnet and the lower part of the support plate; And a housing part having an attachment arm attached to the supporter on the outer periphery of the upper end part, and a top cover having an attachment part aligned with the attachment part of the accommodation part on the lower end part, wherein the vibration mechanism part is accommodated The rice cooker characterized by comprising. The length of the vibration mechanism portion of the vibration device is longer than the length of the case, and the vibration mechanism portion is stored in the case by compressing the first and second elastic bodies. Item 9. A rice cooker according to item 1 . The rice cooker according to claim 1 or 2 , wherein the elastic body is a conical or cylindrical coil spring. Low-frequency current, rice cooker according to any one of claims 1 to 3, characterized in that an alternating wave current or alternating half wave current for driving the electromagnets of the vibrating device. Said vibrator, any one of claim 1 to 4, characterized in that mounted on supporter of the kiln supporting casing so as to be substantially perpendicular to the bottom surface of the vibration direction the rice cooker body Rice cooker as described in. The said vibrating device was attached to the supporter of the said inner pot support case so that the vibration direction might incline with respect to the bottom face of the said rice cooker main body, The any one of Claims 1-4 characterized by the above-mentioned. Rice cooker. A rice cooker according to any one of claims 1 to 6 , wherein a cushioning material is interposed between the vibration exciter and the supporter of the inner hook support case. The rice cooker according to any one of claims 1 to 7 , wherein a vibration damping material is attached to a case of the vibration exciter. The rice shaker according to any one of claims 1 to 8 , wherein the vibratory apparatus is driven during a rice cooking preheating step and, if necessary, a rice cooking step and a heat insulation step. Cooker according to claim 9, characterized in that the vibrating device is driven by changing continuously or intermittently or vibration intensity.

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