JP2010240330A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker in which a lead wire is made to move synchronously with a lid-side spring shaft of a hinge spring, and thereby the lead wire is not made to bend at one point so that the bending portions are dispersed to prevent the breaking of the lead wire. <P>SOLUTION: The rice cooker includes: a rice cooker body having an inner pan, an inner case to store the inner pan and a heating means; a lid body having a lid heater; and a hinge part having a hinge spring which freely opens/closes the lid body against the rice cooker body. One end of the lead wire is connected to the lid heater, and the other end of the lead wire extends into the rice cooker body via the hinge part. The hinge spring has a lid-side spring shaft supporting the supporting means provided at the lid body, and a body-side spring shaft supporting the rice cooker body. The supporting means has a hole part into which the lid-side spring shaft is inserted. The lead wire is inserted through the hole part, so that the lead wire moves synchronously with the lid side spring shaft when opening/closing the lid body. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rice cooker, and more particularly to a wiring structure of lead wires connected to a lid heater.

  Conventionally, as a rice cooker, a metal inner pot is used, and the inner pot is housed in an inner case (protection frame) and is provided by an electromagnetic induction coil provided at the lower part of the inner case and generating electromagnetic induction in the inner pot. What cooks the optimal temperature suitable for the amount of rice cooking is known. In addition, in order to improve the cooking of rice, an inner pot made of a non-metallic material (for example, an earthen pot, a ceramic pot or a charcoal pot) is used as an inner pot, and an induction heating element is formed at the bottom of the inner pot and in the vicinity of the bottom. It is also known to heat the inner pot by heating the induction heating element with a magnetic field generated from an electromagnetic induction coil.

  By the way, when the rice cooker is kept warm, the temperature of the upper part of the inner pot tends to be low, and in particular, the inner pot made of a non-metallic material has a poor heat conduction, so that the temperature of the upper part of the inner pot is particularly difficult to rise. Dew is generated inside the inner pot, and this dew drops on the rice, causing adverse effects such as white blurring of the rice.

  In order to prevent such an adverse effect, it is known that a shoulder heater is provided on the shoulder of the rice cooker, or a lid heater is provided in the lid to increase the temperature of the upper part of the inner pot. By the way, when providing a lid heater in the lid body, a lead wire (including a ground wire when there is a ground wire) is extended from the hinge portion into the rice cooker body and connected to a control circuit in the rice cooker body. However, since the lead wire passes through the hinge part, if the lead wire is not fixed enough, the lead wire will move greatly when the lid is opened and closed, or it will collide with the projection inside the lid, or the lead wire is attached to the rigid If it is, the bending operation will be repeated at one place of the lead wire, and in any case, the worst lead wire may be broken.

  The thing shown in FIG. 14 is known as what supports a lead wire in a hinge part. In the figure, a zigzag passage is formed by shifting the first rib 2 and the second rib 3 perpendicular to the hinge portion 1 in the lateral direction, and a lead wire 4 is attached in an S-shape in this passage. (See Patent Document 1).

Japanese Patent Laid-Open No. 11-261

  However, the thing of the said patent document 1 requires newly providing the 1st rib 2 and the 2nd rib 3 in a hinge part, or the space for arrange | positioning a lead wire in S shape, for example, Even when the lead wire is attached in an S-shape, when the lid is opened and closed, the lead wire is repeatedly bent in a substantially square shape at one location between the lid and the hinge, and there is still a risk of disconnection. Have.

  An object of the present invention is to provide a rice cooker that solves the above problems by moving a lead wire together with a lid-side spring shaft of a hinge spring, that is, by moving the lead wire synchronously.

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

  In the invention which concerns on Claim 1, the rice cooker main body which has an inner pot, the inner case which accommodates the said inner pot, and a heating means, the cover body which has a lid heater, and the said cover body can be opened and closed freely with respect to the said rice cooker main body. And a hinge part having a hinge spring, wherein one end of a lead wire is connected to the lid heater, and the other end of the lead wire extends into the rice cooker body through the hinge part. The hinge spring has a lid-side spring shaft that is supported by a support means provided on the lid body, and a body-side spring shaft that is supported by the rice cooker body, and the support means includes the lid-side spring shaft. The lead wire is inserted into the hole, and moves in synchronization with the lid-side spring shaft when the lid is opened and closed.

  The invention according to claim 2 is further characterized in that the hole has a kerf connected to the outside at a side thereof.

  The invention according to claim 3 is further characterized in that the support means has a zigzag passage outside the kerf.

  The invention according to claim 4 is characterized in that a plurality of the support members are provided along the lid-side spring shaft, and the lid-side spring shaft and the lead wire are supported at a plurality of locations.

  In the invention according to claim 1, the lid-side spring shaft and the lead wire are inserted into the hole of the support means for supporting the lid-side spring shaft of the hinge spring, and the lead wire moves together with the lid-side spring shaft when the lid body is opened and closed. That is, by causing the lead wires to move synchronously, the lead wires are not bent at one place, and the bent portions are dispersed, so that the break of the lead wires can be prevented. Moreover, since a lead wire is attached using the support member which supports a lid | cover side spring axis | shaft, the increase in production cost can be suppressed.

  In the invention according to claim 2, by providing a kerf connected to the outside on the side part of the hole, the lead wire can be inserted into the hole from the kerf, and the invention according to claim 1 In addition to the above effects, the lead wire can be easily inserted into the hole.

  In the invention according to claim 3, by providing a zigzag passage outside the cut groove of the support means, in addition to the effect of the invention according to claim 1, it prevents the inserted lead wire from coming out of the support means. be able to.

  In the invention according to claim 4, a plurality of support members are provided along the lid-side spring shaft, and the lid-side spring shaft and the lead wire are supported at a plurality of locations, thereby further synchronizing the lead wire and the lid-side spring shaft. Assuredly, the disconnection of the lead wire can be further reduced.

It is whole sectional drawing of the rice cooker of this invention, Comprising: The figure which shows simultaneously at the time of lid closing and the time of lid opening The figure which looked at a part of hinge part of this invention from the diagonal The top view of the cover body which removed the upper board of this invention and exposed the cover heater Part A enlarged view of FIG. FIG. 4 is an enlarged view of a cross section taken along line BB in FIG. FIG. 3 is an enlarged view showing another supporting means of the present invention. FIG. 6 is an enlarged view of a cross section taken along the line CC of FIG. FIG. 3 is an enlarged view of part A showing still another supporting means of the present invention. Enlarged view of the cross section along the line D-D in FIG. FIG. 3 is an enlarged view of part A showing still another supporting means of the present invention. Enlarged view of section EE in FIG. FIG. 3 is an enlarged view of part A showing still another supporting means of the present invention. FIG. 3 is an enlarged view of part A showing still another supporting means of the present invention. The figure which shows the attachment-like body in the hinge part of the conventional lead wire for shoulder heaters

  1 shows an overall cross-sectional view of the rice cooker, FIG. 2 shows a view of a part of the hinge portion viewed obliquely, FIG. 3 shows a plan view of the lid with the lid heater exposed, and FIG. 3 is an enlarged cross-sectional view of a portion A, and FIG. 5 is an enlarged view of a cross section taken along line BB of FIG. In addition, let the display panel side (left side of FIG. 1) of the rice cooker be the front side, the hinge member side (right side of FIG. 1) be the rear side, and the side orthogonal to the front-rear direction side (side orthogonal to the paper surface of FIG. 1). Left and right.

  The rice cooker S includes a rice cooker body 20 and a lid 40. The rice cooker body 20 includes an outer case 21 that forms an outer wall, an inner case 22 that is in the outer case 21 and is also a protective frame that forms an inner wall, a shoulder member 23 that forms the upper end of the inner and outer cases 21 and 22, and It consists of the bottom member 24 etc. which form the bottom part of the rice cooker S.

  The outer case 21 is a cylindrical member made of a metal such as stainless steel and has an upper and lower opening, and forms a body portion of the rice cooker S. The shoulder member 23 is made of resin, for example, polypropylene (PP) or the like, and is a member that forms an upper shoulder portion of the rice cooker body 20, and a hinge portion 55 and a handle 25 are provided on the rear side thereof.

  The said inner case 22 provided in the inside of the rice cooker main body 20 is a container-shaped resin member which opens upwards, The metal inner pot 26 is accommodated in the inside. The inner pot 26 may be a ceramic earthen pot made of fired ceramics or glass, which is a non-metallic inner container. In the case of an earthenware pot, a portion facing a bottom coil 29 and a corner coil 30 described later on the bottom of the pot. For example, a metal induction heating element such as a silver paste is attached.

  The inner case 22 has a substantially vertical side portion, a substantially horizontal bottom portion, and a curved portion between the side portion and the bottom portion, and a heat retaining heater 27 is provided on the outer peripheral surface of the side portion. A center sensor 28 is provided at the center of the inner case 22, and the tip of the center sensor 28 abuts on the bottom of the inner pot 26 to detect the temperature of the inner pot 26.

  A work coil including a bottom coil 29 and a corner coil 30 serving as heating means is provided outside the bottom portion and the curved portion of the inner case 22. When the inner pot 26 is set in the inner case 22 and a rice cooking switch is pressed, the center sensor 28 is turned on, the bottom coil 29 and the corner coil 30 are energized, and the inner pot is caused by Joule heat caused by eddy current. 26 is heated, and the contents of rice and other contents are cooked.

  The shoulder member 23 is a member made of synthetic resin that forms the upper part of the rice cooker body 20, and a plurality of locking pieces provided on the lower outer periphery of the shoulder member 23 are formed in locking holes provided on the outer peripheral upper portion of the outer case 21. By inserting, both are firmly connected.

  A display panel 31 having various switches is provided in the upper front portion of the rice cooker body 20, and rice cooking desired by the user is performed by operating various switches on the display panel 31. Further, on the front side in the rice cooker body 20, there are a control board 32 on which various electric elements are mounted, a cooling fin 33 for cooling a heating element such as an IGBT, and a cooling fan 34 for sending cooling air to the cooling fin 33 and the like. It is provided and cools the necessary part in the rice cooker body 20.

  The bottom member 24 is a resin member having a suction port 35 provided on the front side of the bottom member 24 and opposed to the cooling fan 34, and an exhaust port in the figure is provided on the rear side. To be integrally attached to the inner case 22. Then, cooling air from the cooling fan 34 is introduced from the intake port 35, the control board 32, the bottom coil 29, the corner coil 30 and the like are cooled and discharged from the exhaust port.

  The lid 40 is a synthetic resin member, and includes an upper plate 41 that forms an upper surface and a lower plate 42 that forms a lower surface. In addition, a radiator plate 43 is integrally attached to the center of the lower plate, and a lid heater 44 is provided on the upper surface of the radiator plate 43 to heat the radiator plate 43 and to heat the inner pot 26 from above. . In addition, a heat reflecting member made of, for example, a heat insulating material and aluminum foil is provided between the upper plate 41 and the heat radiating plate 43 as necessary to prevent heat radiation from the lid 40 upward.

  An inner lid 49 is detachably attached below the lower plate 42. A seal packing 50 is sandwiched around the outer peripheral edge of the inner lid 49, and abuts against the upper edge of the inner pot 26 when the lid body 40 is closed to prevent escape of heat in the inner pot 26.

  A pressure adjusting member 45 is detachably provided at the center of the lid 40. The pressure adjusting member 45 includes a steam passage 46, a steam valve 47, and a steam port 48, and discharges excessive steam in the inner pot 26 from the steam port 48 to the outside during rice cooking.

  A hinge portion 55 is provided behind the lid body 40. The hinge portion 55 has a hinge pin 56 and a hinge spring 57. The hinge pin 56 is a rod-shaped metal shaft member that supports the hinge spring 57, and includes two ribs 58 that are opposed to the rear end portion of the lower plate 42 of the lid 40 in the front-rear direction and in parallel. The bearing opening 59 is press-fitted and supported. The rib 58 is also a member that forms the side wall of the hinge portion 55.

  The hinge spring 57 is a spring member in which two linear lid-side spring shafts 57a, two spiral portions 57b, and one U-shaped main body-side spring shaft 57c are integrally formed. The two spiral portions 57b are arranged on a straight line, and one U-shaped spring shaft 57c is integrally formed between the two spiral portions 57b, and two lids are further formed. The side spring shafts 57a are integrally formed so as to project in a direction substantially opposite to the direction in which the main body side spring shaft 57c projects from each of the outer ends of the two spiral portions 57b. The lid-side spring shaft 57a has a predetermined length R as shown in FIG.

  That is, as shown in FIG. 3, the hinge spring 57 has a U-shape (main body-side spring shaft 57c) at the center of a U-shape (formed by two lid-side spring shafts 57a and two spiral portions 57b). It is formed as a hollow shape. The hinge pin 56 is inserted into the spiral of the two spiral portions 57 b arranged in a straight line, and as a result, the hinge spring 57 is pivotally supported by the hinge pin 56.

  The upper surface of the rear end portion of the lower plate 42 of the lid body 40 is equivalent to the support means described in the claims at a position where the tips of the two lid-side spring shafts 57a of the hinge spring 57 face each other. Two support members 60 are erected. As shown in FIG. 2, the support member 60 has holes 61, and the two cover-side spring shafts 57 a of the hinge springs 57 are respectively inserted into the holes 61 of the two support members 60. The tip of is inserted.

  And one main body side spring shaft 57c of the hinge spring 57 is supported by the shoulder member 23 in an urged state, and the hinge spring 57 constantly urges the lid 40 in the opening direction, and the front of the rice cooker S. By pressing the lid lock member 36 provided on the upper portion, the lid body 40 is opened rearward.

  By the way, although it is the said lid heater 44, the lid heater 44 has one heater wire 44a, two lead wires 44b, two insulation pipes 44c, and one connector 44d, and the heater wire 44a. One end of each of the lead wires 44b is connected to each of the two ends, each connecting portion is surrounded by an insulating pipe 44c, and the other ends of the two lead wires 44b are connected to one connector 44d. As shown in the plan view of FIG. 3, the single heater wire 44 a is arranged in a spiral shape on almost the entire upper surface of the heat radiating plate 43, and heats the entire heat radiating plate 43 satisfactorily.

  The two lead wires 44b are connected to the tip of the connector 44d, and are drawn out in close proximity to each other. The two lead wires 44b hang down through the vicinity of the hinge pin 56 of the hinge portion 55 and extend into the rice cooker body 20. The connector 44d at the tip of the wire 44b is electrically connected to a control circuit (not shown) in the rice cooker body 20.

  In the present invention, the lead wire 44b is inserted into the hole 61 in which the lid-side spring shaft 57a of the hinge spring 57 is inserted and supported, and the lead wire 44b moves together with the lid-side spring shaft 57a. It is reduced that 44b hits the corner of the lid 40 or the like, or is locally bent, and as a result, the possibility of disconnection of the lead wire is suppressed.

  A state in which the lead wire 44b is inserted into the hole 61 of the support member 60 is shown in FIGS. As shown in FIG. 5, a cut groove 63 connected to the outside is provided on the side portion of the support member 60. The cut groove 63 is for easily inserting the lead wire 44b into the hole 61. If the connector 44d is not provided at the tip of the lead wire 44b, the cut groove 63 is eliminated and the lead wire is inserted into the hole 61. You may insert 44b from the front-end | tip. The lid-side spring shaft 57a may be inserted from the kerf 63. Further, the support member 60 may be provided at any location within the range of the length R of the lid-side spring shaft 57a.

  6 and 7 show modifications of the support member 60. FIG. 4 and 5, a cut groove 63 is provided on a side portion of the support member 60, and a lead wire 44b is inserted through the cut groove 63. The insertion of the lead wire 44b is easy, but the lid 40 is opened and closed. There is a risk that the lead wire 44b inserted from time to time may come out of the cut groove 63.

  In this example, extending portions 60a are provided on the side of the kerf 63 on the side of the support member 60, and a plurality of ribs 60b are alternately provided in the extending portion 60a to form a zigzag passage 60c. is there. In this way, by forming the zigzag passage 60c in the side portion of the kerf 63, it is possible to prevent the adverse effect of the lead wire 44b coming out of the support member 60.

   8 and 9 show a modification for preventing the support member 60 from coming out of the kerf 63. In this example, a rod-shaped member 64 is erected on the hinge pin 56 side from the support member 60 and on the cut groove 63 side. As shown in FIG. 9, the rod-shaped member 64 is positioned so as to partially overlap the kerf 63 when viewed in the front-rear direction. Even in this case, it is possible to prevent the adverse effect that the lead wire 44b comes out of the support member 60. Note that the position of the rod-shaped member 64 may be shifted to the left and right sides in FIG. Moreover, you may combine the thing of this example, and the thing of FIG.6 and FIG.7.

  10 and 11 show another modification of the support member 60. As shown in FIG. 4 and 5, a cut groove 63 is provided in the side portion of the support member 60, and the lead wire 44b is inserted from the cut groove 63. The insertion is easy, but the lid 40 is opened and closed. There is a possibility that the lead wire 44b inserted from time to time may come out of the cut groove 63 again. As shown in FIG. 4, when the support member 60 is provided near the tip of the lid-side spring shaft 57a, the lead wire 44b is synchronized with the lid-side spring shaft 57a between the support member 60 and the base of the lid-side spring shaft 57a. It becomes difficult.

  In this example, another support member 70 is provided between the support member 60 and the base of the lid-side spring shaft 57a, and the lead wire 44b is synchronized over a wide range of the lid-side spring shaft 57a. Further, as shown in FIG. 11, the support member 70 is a bowl-shaped member bent to the opposite side of the kerf 63 of the support member 60. By forming the support member 70 in such a shape, the lead wire 44b is supported. It is possible to prevent the harmful effect of falling out of the member 60 and the support member 70. The support member 70 may be such that the kerf 63 of the support member 60 is on the opposite side, and the other support members 70 may be plural. In that case, the other plurality of support members 70 are provided between the support member 60 and the base of the lid-side spring shaft 57a. In addition, you may combine with the thing of FIG.6 and FIG.7 or / and the thing of FIG.8 and FIG.9.

  FIG. 12 shows an example in which the lead wire 44b can be synchronized by the lid-side spring shaft 57a. In this example, the portion between the support member 60 and the base of the lid-side spring shaft 57a is bound by the tape 71. By doing so, the length of the lead wire 44b synchronized with the lid-side spring shaft 57a is increased, and the disconnection of the lead wire 44b can be further reduced. Although one tape 71 is shown, a plurality of tapes 71 may be bundled. Further, the tape 71 may be replaced with a string, an elastic string, a band, an adhesive, or the like. 6 and 7, or / and FIG. 8 and FIG. 9, or / and FIG. 10 and FIG. 11 may be combined.

  FIG. 13 shows another example in which the lead wire 44b can be synchronized by the lid-side spring shaft 57a. In this example, a support member 80 extending in the front-rear direction from the vicinity of the tip of the lid-side spring shaft 57a to the base is used. This support member 80 is provided with a tunnel-like hole inside, and a cut groove as shown in FIG. By doing so, the length of the lead wire 44b synchronized with the lid-side spring shaft 57a is increased, and the disconnection of the lead wire 44b can be further reduced.

  The invention of the present application is not limited to the configuration of the above embodiment, and can be appropriately changed in design without departing from the gist of the invention. When there are a plurality of lead wires, only one of them is targeted. Alternatively, all may be the target, and if there is a ground wire, the ground wire may also be the target.

S ... Rice cooker 20 ... Rice cooker body 21 ... Outer case 22 ... Inner case 23 ... Shoulder member 24 ... Bottom member 25 ... Handle 26 ... Inner pan 27 ... Insulating heater 28 ... Center sensor 29 ... Bottom coil 30 ... Corner coil 31 ... Display panel 32 ... Control board 33 ... Cooling fin 34 ... Cooling fan 35 ... Intake port 36 ... Lid lock member 40 ... Lid body 41 ... Upper plate 42 ... Lower plate 43 ... Heat sink 44 ... Lid heater 44a ... Heater wire 44b ... Lead Wire 44c ... Insulating pipe 44d ... Connector 45 ... Pressure regulating member 46 ... Steam passage 47 ... Steam valve 48 ... Steam port 49 ... Inner cover 50 ... Seal packing 55 ... Hinge part 56 ... Hinge pin 57 ... Hinge spring 57a ... Cover side spring shaft 57b ... Spiral part 57c ... Main body side spring shaft 58 ... Rib 59 ... Bearing opening 60 ... Supporting member 60a ... Extension part 60b ... Rib 60 ... zigzag passages 61 ... holes 62 ... pressing member 63 ... kerf 64 ... bar-like member 70 ... support member 71 ... tape 80 ... support member

Claims (4)

A rice cooker body having an inner pot, an inner case for storing the inner pot and a heating means, a lid body having a lid heater, and a hinge portion having a hinge spring that allows the lid body to be opened and closed with respect to the rice cooker body; A rice cooker having
One end of a lead wire is connected to the lid heater, and the other end of the lead wire extends into the rice cooker body through the hinge portion,
The hinge spring has a lid-side spring shaft supported by a support means provided on the lid body and a body-side spring shaft supported by the rice cooker body,
The support means has a hole portion into which the lid-side spring shaft is inserted,
The lead wire is inserted into the hole and moves in synchronization with the lid-side spring shaft when the lid is opened and closed.   The rice cooker according to claim 1, wherein the hole has a kerf connected to an outer side thereof.   The rice cooker according to claim 2, wherein the supporting means has a zigzag passage outside the kerf.   The said support member is provided with two or more along the said lid side spring axis | shaft, The said lid side spring axis | shaft and the said lead wire are supported in multiple places, The Claim 1 characterized by the above-mentioned. rice cooker.

Images