JP6377999B2 - Gas stove - Google Patents

Description

  The present invention relates to a gas stove.

  Conventionally, a gas stove including a heating unit, a heating control unit, a stove body, a top plate installed on the stove body, and an operation unit is known (see, for example, Patent Document 1 and Patent Document 2). .

  In the conventional example described in Patent Document 1, since the operation unit is provided as a part of the top plate, it is easy to use, but when the temperature of the top plate rises, the operation unit also becomes hot. It was.

  Therefore, by applying the operation unit separate from the top plate described in Patent Document 2 to the conventional example described in Patent Document 1, the operation unit is provided on the top plate and is easy to use, and the temperature of the top plate increases. Even in this case, it is possible to suppress an increase in the temperature of the operation unit.

  However, in this case, the operation unit protrudes from the top surface of the top plate, and the operation unit becomes an obstacle when cleaning the top plate.

  Therefore, an operation unit was detachably provided as a separate body from the top plate, and an operation unit rotation detection magnetic pole provided on the operation unit was detected by a magnetic detection unit provided on the back side of the top plate. . However, it is desired that a means other than a magnetic input signal for giving a control command to the heating control means from the operation section is provided in the operation section, and a technique of a capacitance switch (see, for example, Patent Document 3) is applied. It was thought that.

Japanese Patent No. 4604826 JP 2004-263929 A JP 2007-109649 A

  When the technique described in Patent Document 3 is applied, it is necessary to provide an electrode constituting the capacitance switch separately from the magnet, and the structure becomes complicated.

  The present invention has been invented in view of the above-described conventional problems, and provides a gas stove capable of providing means other than a magnetic input signal that gives a control command to the heating control means from the operation unit with a simple configuration. The task is to do.

  In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a heating means, a heating control means for controlling the heating means, a stove body on which the heating means and the heating control means are installed, and on the stove body. A gas stove comprising: a top plate made of a non-magnetic material installed on the top plate; and an operation unit provided on the top surface of the top plate for giving a control command to the heating control means. A rotation center position where a vertical axis as a rotation center is located is set, and a main magnetic flux forming magnetic pole for forming a main magnetic flux penetrating up and down the top plate is provided on the lower surface side of the rotation center position of the top plate. The operation unit has a main magnetic pole in the operation unit that is magnetically coupled to the main magnetic flux and is held at the rotation center position of the top plate in a predetermined vertical direction at the portion serving as the vertical axis of the operation unit. The main magnetic pole in the operation section The operation unit rotation detection magnetic pole is provided in a portion separated in plan view, and the magnetic detection unit for detecting the magnetic flux from the operation unit rotation detection magnetic pole is provided on the lower surface side of the top plate. A conductive portion that is electrically connected to the main magnetic pole in the operation portion is provided on the upper surface of the operation portion, and a plate having an area larger than a cross-sectional area in plan view of the main magnetic pole in the operation portion on the lower surface of the main magnetic pole in the operation portion The magnetic pole for forming the main magnetic flux is used as one electrode constituting the capacitor portion, and a change in the capacitance of the capacitor portion is detected to detect that the human body of the user is in contact with or close to the conducting portion. A capacitance switch for detection is provided.

  In the invention according to claim 2, in the invention according to claim 1, there is provided a cap that is electrically connected to the main magnetic pole in the operation portion and covers the upper surface of the main magnetic pole in the operation portion. The conductive portion is exposed above the operation portion and provided on the upper surface of the operation portion.

  In the invention according to claim 1, it has a function of transmitting a signal as a capacitance switch from the operation unit to the heating control means with a simple configuration simply by providing a plate at the lower end of the main magnetic pole in the operation unit. Switching means other than the magnetic input signal is provided on the operation unit.

  In the invention according to claim 2, the user does not directly touch the main magnetic pole in the operation section, and the surface contamination and corrosion of the main magnetic pole in the operation section due to the user directly touching the main magnetic pole in the operation section are suppressed. Thus, the durability of the operation unit is improved.

It is a front sectional view of the gas stove excluding the top plate of the first embodiment. It is a top view of the gas stove of 1st embodiment. It is a partial expanded longitudinal cross-sectional view of the operation part, top plate, and board | substrate of 1st embodiment. FIG. 4A is a plan sectional view of the operation unit of the first embodiment, and FIG. 4B is a longitudinal sectional view of the operation unit of the first embodiment. FIG. 5A is a plan view of the substrate of the first embodiment, and FIG. 5B is a longitudinal sectional view of the substrate of the first embodiment.

  1st Embodiment of the gas stove of this invention is described based on FIG. 1 thru | or FIG. Although not shown, the gas stove 1 according to the first embodiment is a drop-in stove that is inserted from above into an opening formed in a kitchen counter, but is not limited to a drop-in stove, and is a table stove. May be.

  As shown in FIGS. 1 and 2, the gas stove 1 includes a heating unit, a heating control unit that controls the heating unit, a stove body 10, a top plate 2, and an operation unit 3. The heating means comprises a stove burner 11, and the stove burner 11 and the heating control means are accommodated in the stove main body 10. The stove body 10 has a substantially box shape that opens upward, and the upper portion of the stove burner 11 that is substantially circular is exposed upward through the upper opening. A top plate 2 that covers the upper opening is installed on the upper side of the stove body 10.

  The top plate 2 is made of a non-magnetic material. In the first embodiment, the top plate 2 is made of glass whose upper surface is a flat surface, but may be made of other materials, and is not particularly limited. A top plate opening is formed in a portion of the top plate 2 through which the stove burner 11 is inserted. In the first embodiment, the burner ring 12 is provided between the outer end edge of the stove burner 11 inserted through the top plate opening and the inner end edge of the top plate opening, but the burner ring 12 may not be provided. Good. In the first embodiment, the top plate 2 is installed so that the upper surface is horizontal, but it may not be particularly horizontal. Note that the horizontal in this case includes not only strict horizontal but also horizontal in a range that can be treated as horizontal in practice even if not strict horizontal.

  In the first embodiment, two stove burners 11 are provided on the left and right as shown in FIGS. The two stove burners 11 basically have the same structure. In addition, the number of the combo burners 11 is not limited to two, but may be one, three, four or more, and the plurality of the combo burners 11 may have different detailed structures and specifications (thermal power, etc.). In the first embodiment, the virtues 13 are placed on the burner ring 12 (may be on the top plate 2) around the stove burner 11, but the virtues 13 may not be provided.

  Moreover, in 1st embodiment, the stove burner 11 is provided with the temperature sensor 14 which detects the temperature of the bottom part of the cooking container (not shown) mounted in the virtues 13 as shown in FIG. 1, FIG. . Based on the temperature detected by the temperature sensor 14, the heating control means executes an automatic cooking mode or the like. In the first embodiment, the temperature sensor 14 is provided, but the temperature sensor 14 may not be provided.

  In the first embodiment, a grill cabinet 15 having a grill burner is provided in the stove body 10. The front opening of the grill cabinet 15 is closed by a grill door 16 provided at the front end of the stove body 10 so as to be freely opened and closed.

  On the top surface of the top plate 2, there is provided an operation unit 3 to be described later which gives a control command for switching the ignition / extinguishing of the stove burner 11 and heating power adjustment. Controls the stove burner 11.

  Although not shown in the figure, the front of the gas stove 1 is provided with an operation unit for giving a control command for switching the ignition / extinguishing of the grill burner or adjusting the heating power to the heating control means, and automatic cooking timer mode, hot water mode, rice cooking mode, etc. in the gas stove 1 There is provided an automatic cooking operation section for giving the heating control means a control command of an automatic cooking mode such as a cooking mode, a cooking timer mode in the grill, and various baking modes.

  In the first embodiment, the grill stove 15 is provided in the gas stove 1, but the grill stove 15 may not be provided. Moreover, in 1st embodiment, although the automatic cooking operation part is provided in the front part of the gas stove 1, an automatic cooking operation part does not need to be provided.

  Although not shown, the stove burner 11 and the grill burner are supplied with a fuel gas such as city gas through a gas supply path accommodated in the stove main body 10. An original solenoid valve and a flow control valve are provided in the gas supply path. When the operation unit 3 described later is operated to send an ignition command to the heating control means, the heating control means opens the original electromagnetic valve of the gas supply path of the corresponding burner, opens the flow control valve at a predetermined opening degree, and Spark is ignited by the spark plug 17.

  Hereinafter, the operation part 3 of the stove burner 11 provided on the upper surface of the top plate 2 will be described. As shown in FIG. 2, the operation unit 3 is provided at a predetermined position on the top surface of the top plate 2 by magnetic coupling, and is rotated as an operation. In the first embodiment, as shown in FIG. 2, the stove burner 11 is provided on the rear side of the center of the top plate 2 in the front-rear direction. Thereby, it is suppressed that the operation part 3 provided in the front side of the upper surface of the top plate 2 is heated by the stove burner 11, and temperature rises.

  As shown in FIG. 3, the top plate 2 is set with a rotation center position 20 where the vertical axis 30 serving as the rotation center of the operation unit 3 is located. In the first embodiment, the rotation center position 20 is set at a predetermined position on the front side of the corresponding burner 11.

  As shown in FIG. 3, a main magnetic flux forming magnetic pole 4 that forms a main magnetic flux penetrating the top plate 2 up and down is provided on the lower surface side of the rotation center position 20 of the top plate 2. In the first embodiment, a columnar neodymium magnet having a diameter of 10 mm and a height of 3 mm is used as the main magnetic flux forming magnetic pole 4, but the type, dimension and shape of the magnet (including the electromagnet), and other characteristics ( For example, the strength of magnetic force is not particularly limited. In the first embodiment, a neodymium magnet as the main magnetic flux forming magnetic pole 4 is arranged in a direction in which the S pole is positioned on the upper side and the N pole is positioned on the lower side. It penetrates perpendicularly to the upper surface of the plate 2. The S pole and the N pole are set for convenience and may be reversed. The main magnetic flux forming magnetic pole 4 may be fixed to either the lower surface of the top plate 2 or the stove body 10 or may be fixed to another member. In the first embodiment, the main magnetic flux forming magnetic pole 4 is fixed to the substrate 18 and is in contact with the lower surface of the cushion 21 provided on the lower surface of the top plate 2.

  The operation unit 3 is operated to be rotated around the vertical axis 30 serving as a rotation center. As shown in FIGS. 3 and 4, the operation unit 3 includes a casing 31 having a circular shape in a plan view and serving as an outer shell. In the first embodiment, the casing 31 includes a lid portion 31a that constitutes the upper surface, a cylinder portion 31b that constitutes the side peripheral surface, and a bottom portion 31c that constitutes the lower surface. The lid portion 31a is fitted into the upper end portion of the cylindrical portion 31b, and the bottom portion 31c is fitted into the lower end portion of the cylindrical portion 31b to form an outer shell. The dimensional shape of the outer shell is 42.4 mm in diameter and 11 mm in height, but the dimensional shape is not particularly limited, and it is not particularly limited by what member the outer shell is configured.

  The operation unit 3 is provided with an operation unit main magnetic pole 5 at a portion that becomes the vertical axis 30. The operation part main magnetic pole 5 is magnetically coupled to the main magnetic flux and holds the operation part 3 in a predetermined vertical direction at the rotation center position 20 of the top plate 2. In the first embodiment, a cylindrical neodymium magnet having a diameter of 10 mm and a height of 8 mm is used as the main magnetic pole 5 in the operation section. However, the type of magnet (including an electromagnet), size and shape, and other characteristics (for example, The strength of the magnetic force is not particularly limited. In the first embodiment, the neodymium magnet as the operation portion main magnetic pole 5 is arranged in a direction in which the S pole is located on the upper side and the N pole is located on the lower side. The S pole and the N pole are set for convenience and may be reversed.

  As shown in FIG. 3, when the operation unit 3 is arranged in a predetermined direction at a predetermined position on the top plate 2, the magnetic flux of the main magnetic pole 5 in the operation unit is transferred to the main magnetic flux penetrating the rotation center position 20 up and down. The magnetic force that acts to maintain the operation unit 3 in the vertical direction (vertical posture) acts and the force that the operation unit main magnetic pole 5 attempts to position at the position of the main magnetic flux. As a result, the operation unit 3 has the operation unit main magnetic pole 5 positioned immediately above the main magnetic flux forming magnetic pole 4 and maintains the position in plan view. In this state, even if a force acts on the operation unit 3 in the horizontal direction and slides on the top surface of the top plate 2, a magnetic force is applied to return the operation unit 3 to a predetermined position. Return to the predetermined position.

  As shown in FIGS. 3 and 4, the operation unit 3 is provided with an operation unit rotation detection magnetic pole 6 in a portion away from the operation unit main magnetic pole 5 in plan view. In the first embodiment, as shown in FIG. 4, a columnar neodymium magnet having a diameter of 3 mm and a height of 6 mm is used as the operation portion rotation detection magnetic pole 6 from the operation portion main magnetic pole 5 to the center in plan view. Six pieces are provided at 60 ° intervals at positions 15 mm apart from each other (first predetermined distance). The operation unit rotation detection magnetic pole 6 is particularly limited with respect to the type of magnets (including electromagnets), dimensions, other characteristics (for example, the strength of magnetic force), the number, the first predetermined distance, the predetermined angular interval, and the like. Not.

  As shown in FIG. 3, on the lower surface side of the top plate 2, a click feeling imparting magnetic pole 7 is provided at a position away from the main magnetic flux forming magnetic pole 4 in plan view. In the first embodiment, as shown in FIG. 5, a columnar neodymium magnet having a diameter of 7 mm and a height of 3 mm is used as the click feeling imparting magnetic pole 7 in the plan view from the main magnetic flux forming magnetic pole 4. (Second predetermined distance) 13.5 mm away, but the type of magnet (including electromagnet), size and shape, other characteristics (for example, strength of magnetic force), number, second predetermined distance, etc. Is not particularly limited. For example, the second predetermined distance may be the same as the first predetermined distance. In the first embodiment, the neodymium magnet as the click feeling imparting magnetic pole 7 is arranged in a direction in which the S pole is located on the upper side and the N pole is located on the lower side. The S pole and the N pole are set for convenience and may be reversed. The click feeling imparting magnetic pole 7 may be fixed to either the lower surface of the top plate 2 or the stove main body 10 or may be fixed to another member. In the first embodiment, the click feeling imparting magnetic pole 7 is fixed to the substrate 18. The click-feel imparting magnetic pole 7 has an arbitrary configuration and may not be provided.

  When the operation unit 3 rotates, the magnetic attractive force acting between the operation unit rotation detection magnetic pole 6 and the click feeling imparting magnetic pole 7 changes every predetermined angular interval (60 ° in the first embodiment). . Thereby, a click feeling can be given to the operation unit 3 at every predetermined angular interval. Furthermore, the rotation angle of the operation unit 3 in plan view is maintained by the magnetic attractive force acting between the operation unit rotation detection magnetic pole 6 and the click feeling imparting magnetic pole 7. Thereby, even when a vibration occurs due to an earthquake or the like, the rotation angle of the operation unit 3 is maintained, and the operation unit 3 is prevented from rotating unless operated by the user.

  As shown in FIG. 3, a magnetic detection unit 8 that detects magnetic flux from the operation unit rotation detection magnetic pole 6 is provided on the lower surface side of the top plate 2. In the first embodiment, as shown in FIG. 5, as the magnetic detection unit 8, a 3 mm × 2 mm Hall element in a plan view is 8 at a distance (third predetermined distance) from the center of the main magnetic flux forming magnetic pole 4. Two are provided at positions that are 30 mm apart from the direction in which the click-feel imparting magnetic pole 7 is provided at a position 5 mm away. Note that the number (two or more) of magnetic detection units 8 and the third predetermined distance are not particularly limited, and are not limited to Hall elements, and may be other magnetic detection elements such as magnetic detection resistors.

  The magnetic detection unit 8 may be fixed to either the lower surface of the top plate 2 or the stove body 10, or may be fixed to another member. In the first embodiment, the magnetic detection unit 8 is fixed to the substrate 18.

  In the present invention, a conductive portion 34 that is electrically connected to the main magnetic pole 5 in the operation portion is provided on the upper surface 33 of the operation portion 3, and an electrostatic that detects that the user's human body is in contact with or close to the conductive portion 34. A capacity switch (not shown) is provided. In the first embodiment, the lid portion 31a is formed in an annular shape having a circular opening 33a at the center, and the cap formed of a conductive member such as SUS304 or the like in the opening 33a. 51 is arranged to form the conductive portion 34.

  The cap 51 includes an upper surface portion 51a that covers the upper surface of the operation portion main magnetic pole 5, a cylinder portion 51b that hangs from the periphery of the upper surface portion 51a and covers the upper end portion of the side peripheral surface of the operation portion main magnetic pole 5, and a tube portion 51b. It is comprised by the flange part 51c provided in a row from the lower end periphery. The cap 51 has the upper surface portion 51a and the cylinder portion 51b covering the upper end portion of the main magnetic pole 5 in the operation portion, and the flange portion 51c is covered with the upper surface portion 51a and the upper end portion of the cylinder portion 51b disposed in the opening 33a. The upper surface portion 51a and the cylindrical portion 51b are prevented from coming out upward from the opening 33a by contacting the back side of the portion 31a. The upper surface portion 51a is positioned in the opening 33a with substantially no gap, and the upper surfaces of the upper surface portion 51a and the lid portion 31a are flush with each other (or substantially flush with each other).

  In the present invention, a plate 52 provided on the lower surface of the main magnetic pole 5 in the operation section and electrically connected to the main magnetic pole 5 in the operation section is provided.

  The plate 52 is formed of a conductive member such as metal such as SUS304, and is disposed so as to face the main magnetic flux forming magnetic pole 4. The plate 52 has an area larger than the cross-sectional area of the main magnetic pole 5 in the operation section in plan view. In the first embodiment, the diameter of the plate 52 is 16 mm with respect to the diameter of 10 mm in the main magnetic pole 5 in the operation section.

  Further, in the present invention, the main magnetic flux forming magnetic pole 4 is used as one electrode that constitutes a capacitance portion in which a change in capacitance is detected in the capacitance switch.

  In addition, as an electrostatic capacitance switch, the existing switch can be used as appropriate, and detailed description is omitted. However, the capacitance switch includes a capacitance unit having one electrode, and is grounded through one electrode and a user's human body. It detects that the electrostatic capacitance between the two parts changes due to the contact or proximity of the human body to the conductive part 34 and detects the contact or proximity of the human body. The detection result by the capacitance switch is transmitted to the heating control means. Thus, in the first embodiment, a function of transmitting a signal as a capacitance switch from the operation unit 3 to the heating control unit with a simple configuration in which the plate 52 is simply provided at the lower end of the operation unit main magnetic pole 5. The switching means other than the magnetic input signal is provided on the operation unit 3.

  When the operation unit 3 rotates, the magnetic detection unit 8 detects the magnetic flux from the operation unit rotation detection magnetic pole 6, but the distance between the operation unit rotation detection magnetic pole 6 and the magnetic detection unit 8 is large or small. The magnitude of the magnetic flux detected by the magnetic detection unit 8 changes depending on (that is, depending on the rotation angle of the operation unit 3). By the rotation operation of the operation unit 3 as described above, the magnitude of the magnetic flux from the operation unit rotation detection magnetic pole 6 detected by the two magnetic detection units 8 is changed, respectively, and a control command for adjusting the thermal power is supplied to the heating control unit. Can be given to.

  Further, when the operation unit 3 at a predetermined position is slid backward on the top plate 2 as indicated by an arrow A in FIG. 2, the operation unit rotation detection magnetic pole 6 detected by the two magnetic detection units 8. It is detected that the magnitude of the magnetic flux from each has changed, and the operation unit 3 has been slid. By such sliding movement of the operation unit 3, a control command for switching the ignition / extinguishing of the combustor 11 can be given to the heating control means, and the combustor 11 can be ignited or extinguished.

  As described above, the operation unit 3 that has been slid rearward from the predetermined position returns to the predetermined position due to the magnetic force generated by the operation unit main magnetic pole 5 and the main magnetic flux forming magnetic pole 4.

  In the present invention, it is added as a condition that the user is touching the conductive portion 34 on the upper surface 33 of the operation unit 3 when switching the ignition / extinguishing by the sliding movement of the operation unit 3.

  More specifically, as described above, when the combustor 11 corresponding to the operation unit 3 is extinguished, the operation unit 3 is moved as indicated by an arrow a while detecting that the user has touched the conductive unit 34 as described above. When the slide is moved backward, the magnetic detection unit 8 detects this slide movement and the heating control means ignites the corresponding burner 11.

  As described above, when the burner 11 corresponding to the operation unit 3 is ignited and burned, the operation unit 3 is moved backward as indicated by an arrow A while detecting that the user has touched the conductive unit 34. When the slide movement is performed, the magnetic detection unit 8 detects this slide movement, and the heating control means extinguishes the corresponding burner 11.

  On the other hand, when the burner 11 corresponding to the operation unit 3 is extinguished, the operation unit 3 is slid rearward as indicated by an arrow A in a state where it is not detected that the user has touched the conductive unit 34. Even if it is moved, the magnetic detection unit 8 detects this slide movement, but the heating control means does not ignite the corresponding burner 11.

  In addition, when the burner 11 corresponding to the operation unit 3 is ignited, even if the user does not detect that the conductive unit 34 has been touched, the slide is moved backward as indicated by the arrow a. Although the magnetic detection unit 8 detects the movement, the heating control means does not extinguish the corresponding burner 11.

  Thus, if it is not in a state where it is detected that the user has touched the conductive portion 34, even if the operation portion 3 is slid backward as indicated by the arrow a, the fire extinguishing of the stove burner 11 is not performed. When the operation unit 3 is touched to the side of the operation unit 3 and slides backward, it is prevented that the burner 11 is extinguished against the user's intention.

  In the first embodiment, since the plate 52 is electrically connected to the main magnetic pole 5 in the operation section at the lower end of the main magnetic pole 5 in the operation section, the electrode is arranged to face the main magnetic flux forming magnetic pole 4. In other words, the area of the plate 52 increases, and the capacitance change in the capacitance switch increases.

  That is, as in the first embodiment, when the plate 52 is disposed, the electrode (plate 52) disposed to face the magnetic flux forming magnetic pole 4 has a diameter of 16 mm, whereas the plate 52 is disposed. If not, the electrode (the main magnetic pole 5 in the operation section) arranged to face the magnetic flux forming magnetic pole 4 has a diameter of 10 mm.

  In the first embodiment, as described above, the area of the electrode disposed opposite to the magnetic flux forming magnetic pole 4 is increased, so that the electrostatic capacitance detected when the user touches the conductive portion 34 of the operation unit 3. The change in capacitance becomes larger than that in the case where the plate 52 is not disposed, and it is easy to detect that the user has touched the conductive portion 34.

  Therefore, it is appropriate whether the operation unit 3 is simply slid rearward or whether the operation unit 3 is slid rearward while the user is touching the conductive unit 34. It can be determined, and when the operation unit 3 is slid rearward unintentionally, it can be further prevented that the combustor 11 is ignited against the user's intention.

  In the first embodiment, since the conductive portion 34 is formed by the cap 51 that covers the upper surface of the main magnetic pole 5 in the operation section, the user does not directly touch the main magnetic pole 5 in the operation section, and the user can Contamination and corrosion of the surface of the operation portion main magnetic pole 5 due to direct contact with the magnetic pole 5 are suppressed, and the durability of the operation portion 3 is improved.

  In the gas stove 1 according to the first embodiment, since the operation unit 3 is provided on the top surface of the top plate 2, it can be disposed close to the corresponding stove burner 11, which is convenient and convenient.

  Moreover, since the gas stove 1 of 1st embodiment operates the operation part 3, it operates the top plate 2 directly like what operates the so-called touch panel type operation part 3 formed in the top plate 2. FIG. There is no need. For this reason, even if it is a case where the temperature of the top plate 2 rises, it is suppressed that a user touches the top plate 2 and feels hot.

  In the gas stove 1 of the first embodiment, the operation unit 3 is configured such that the operation unit main magnetic pole 5 is magnetically coupled to the main magnetic flux during use and is installed at a predetermined position on the top surface of the top plate 2. By pulling the operation unit 3 away from a predetermined position, the magnetic coupling is released and the operation unit 3 can be detached from the top 2. That is, the operation unit 3 can be detachably provided on the top surface of the top plate 2. Thereby, when cleaning the upper surface of the top plate 2 when not in use (especially wiping and cleaning), the operation unit 3 does not get in the way, and the upper surface of the flat top plate 2 can be cleaned, thereby improving the ease of cleaning.

  Moreover, in 1st embodiment, as shown in FIG. 4, the lower surface 32 of the casing 31 of the operation part 3 is a convex curved surface which becomes convex downward. In the first embodiment, the lower surface 32 of the portion that becomes the vertical axis 30 (that is, the center of the operation unit 3 in a plan view) is positioned at the lowest position, and the lower surface 32 is positioned upward as it goes in the radially outward direction. Yes. At the outer edge, the angle formed by the lower surface 32 with respect to the horizontal direction is 0.75 °.

  As described above, the lower surface 32 of the casing 31 of the operation unit 3 has a convex curved surface, so that the contact surface between the lower surface 32 of the casing 31 and the upper surface of the top plate 2 becomes a part rather than the entire lower surface 32 of the casing 31. The contact area is small. Thereby, even if it is a case where the temperature of the top plate 2 rises, the calorie | heat amount transmitted from the top plate 2 to the operation part 3 is reduced, and it is suppressed that the operation part 3 becomes hot. Furthermore, since the contact area between the lower surface 32 of the casing 31 and the upper surface of the top plate 2 is reduced, the friction when the operation unit 3 rotates is small, and the operation unit 3 rotates smoothly.

  In addition, the lower surface 32 of the casing 31 may not be such a convex curved surface, for example, may be a flat surface.

  Moreover, in 1st embodiment, as shown in FIG. 4, the upper surface 33 of the casing 31 of the operation part 3 is a concave curved surface dented below. In the first embodiment, the upper surface of the portion serving as the vertical axis 30 (that is, the upper surface portion 51a of the cap 51) is positioned at the lowest position, and the upper surface 33 is positioned upward as it goes in the radially outward direction. The same concave curved surface is formed by the upper surfaces of the upper surface portion 51a and the lid portion 31a.

  In this way, by making the upper surface 33 of the casing 31 of the operation unit 3 a concave curved surface, the user does not operate by gripping the side surface of the operation unit 3, but operates while pressing the upper surface 33 of the operation unit 3 with a finger. When the part 3 is rotated, it becomes difficult for the finger to fall off from the outer edge of the upper surface 33, the operability is improved, and the usability is improved.

  In addition, the upper surface 33 of the casing 31 does not need to be such a concave curved surface, for example, may be a flat surface or a convex curved surface.

DESCRIPTION OF SYMBOLS 1 Gas stove 10 Stove body 11 Stove burner 12 Burner ring 13 Gotoku 14 Temperature sensor 15 Grill box 16 Grill door 17 Spark plug 18 Substrate 2 Top plate 20 Rotation center position 21 Cushion 3 Operation part 30 Vertical shaft 31 Casing 31a Cover part 31b Tube part 31c Bottom portion 32 Lower surface 33 Upper surface 33a Opening 34 Conducting portion 4 Main magnetic flux forming magnetic pole 5 Main magnetic pole in operation portion 51 Cap 51a Upper surface portion 51b Cylindrical portion 51c Flange portion 52 Plate 6 Operation portion rotation detection magnetic pole 7 Click feeling imparting magnetic pole 8 Magnetic detector

Claims (2)

Heating means and heating control means for controlling the heating means;
A stove body in which the heating means and the heating control means are installed;
A top plate made of a non-magnetic material installed on the stove body,
An operation unit that is provided on an upper surface of the top plate and gives a control command to the heating control unit;
A gas stove comprising
A rotation center position where a vertical axis serving as a rotation center of the operation unit is located on the top plate is set,
A main magnetic flux forming magnetic pole for forming a main magnetic flux penetrating the top plate up and down is provided on the lower surface side of the rotation center position of the top plate,
A main magnetic pole in the operation unit that is magnetically coupled to the main magnetic flux and is held at the rotation center position of the top plate in a predetermined vertical direction is provided at a portion that becomes the vertical axis of the operation unit,
An operation part rotation detection magnetic pole is provided in a part of the operation part that is separated from the main magnetic pole in the operation part in plan view,
On the lower surface side of the top plate, a magnetic detection unit for detecting a magnetic flux from the operation unit rotation detection magnetic pole is provided,
On the upper surface of the operation portion, a conduction portion that is electrically connected to the main magnetic pole in the operation portion is provided,
A plate having an area larger than a cross-sectional area in plan view of the main magnetic pole in the operation portion is provided on the lower surface of the main magnetic pole in the operation portion.
The main magnetic flux forming magnetic pole is used as one electrode constituting a capacitive part, and by detecting a change in electrostatic capacity of the capacitive part, an electrostatic that detects that a user's human body is in contact with or close to the conducting part is detected. A gas stove provided with a capacity switch. A cap that is electrically connected to the main magnetic pole in the operation portion and covers the upper surface of the main magnetic pole in the operation portion is provided;
The gas stove according to claim 1, wherein the cap constitutes the conduction portion that is exposed above the operation portion and provided on an upper surface of the operation portion.

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