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WO2019128117A1 - 烹饪器具 - Google Patents

烹饪器具 Download PDF

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Publication number
WO2019128117A1
WO2019128117A1 PCT/CN2018/090427 CN2018090427W WO2019128117A1 WO 2019128117 A1 WO2019128117 A1 WO 2019128117A1 CN 2018090427 W CN2018090427 W CN 2018090427W WO 2019128117 A1 WO2019128117 A1 WO 2019128117A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
cover
cooking appliance
electromagnet
magnet
Prior art date
Application number
PCT/CN2018/090427
Other languages
English (en)
French (fr)
Inventor
杨保民
潘典国
周忠宝
周亚
何新华
刘小力
刘小凯
黄宇华
孙毅
娄飞
Original Assignee
佛山市顺德区美的电热电器制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201721886233.1U external-priority patent/CN208822450U/zh
Priority claimed from CN201721861605.5U external-priority patent/CN208822310U/zh
Priority claimed from CN201711448387.7A external-priority patent/CN109965666B/zh
Priority claimed from CN201721885495.6U external-priority patent/CN208822311U/zh
Priority claimed from CN201711446836.4A external-priority patent/CN109965665B/zh
Priority claimed from CN201721885605.9U external-priority patent/CN208822312U/zh
Application filed by 佛山市顺德区美的电热电器制造有限公司 filed Critical 佛山市顺德区美的电热电器制造有限公司
Priority to EP18897618.7A priority Critical patent/EP3705001B1/en
Priority to KR1020207018892A priority patent/KR102350545B1/ko
Priority to JP2020535585A priority patent/JP7027550B2/ja
Priority to US16/766,781 priority patent/US11653788B2/en
Publication of WO2019128117A1 publication Critical patent/WO2019128117A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0804—Locking devices
    • A47J27/0815—Locking devices where vessel and lid have adapted shapes to provide for the locking action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/06—Lids or covers for cooking-vessels
    • A47J36/10—Lid-locking devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/004—Cooking-vessels with integral electrical heating means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0802—Control mechanisms for pressure-cookers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0804—Locking devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/086—Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means

Definitions

  • the present invention relates to the field of household appliances, and in particular to a cooking appliance.
  • a locking mechanism In a household appliance such as a rice cooker, in order to facilitate the snapping of the upper cover to the body, a locking mechanism is usually designed to perform the locking.
  • the locking mechanism is usually a mechanical snap-locking structure such as a push-type locking mechanism.
  • the mechanical snap-fit structure added to the product needs to be compact in structure and small in space, so as not to affect the appearance of the product too much, but more or less makes the appearance of the product more complicated, which affects the design of the product.
  • the mechanical snap-fit structure not only needs to be small in size, but also must be very precise in size, otherwise it will be tripped or closed, which directly affects the user's use. .
  • the mechanical snap-fit button is usually placed on the cover, and it is easy to be hot by high-temperature steam when the user operates.
  • the present invention provides a cooking appliance comprising a seat body and a cover body, the cover body being pivotally mounted to the seat body, the cooking appliance further comprising:
  • a suction assembly comprising a first suction member and a second suction member, one of the first suction member and the second suction member being disposed on the seat body, and the other being disposed in the a cover body, the first suction member is attracted to the second suction member to lock the cover body to the seat body.
  • the pivoting spring in the closed state of the cover body, has a resetting torque M2 that is smaller than the magnet and the iron core rod with respect to a pivotal hinge point between the cover body and the seat body
  • the sum of the attraction torque M3 between the magnetic attraction forces and the center of gravity torque M1 of the cover is smaller than the magnet and the iron core rod with respect to a pivotal hinge point between the cover body and the seat body
  • the suction assembly is preferably a magnetic closure assembly and is disposed at a distal end relative to the pivotal connection.
  • the suction assembly may include a first magnetic member and a second magnetic member as the first and second suction members, respectively, the first magnetic member and the second magnetic member One of the ones is disposed on the seat body and the other is disposed on the cover body, the first magnetic member and the second magnetic member are magnetically coupled to lock the cover body to the Seat.
  • the first suction member is a magnet and the second suction member is a core rod.
  • the magnet may be a permanent magnet or an electromagnet
  • the iron core rod may be a single iron rod or an iron block, or may be an iron core of an electromagnet.
  • the iron core rod is a telescopic movable rod that is movable between a close position and a distant position relative to the magnet in a closed state of the cover;
  • the sum of the attraction torque M3 of the magnetic attraction force between the magnet and the core rod and the center of gravity torque M1 of the cover is smaller than the reset torque M2 of the pivot spring to open the cover body.
  • the cooking appliance further includes a lever mechanism with a lever switch that dials the core rod from the approaching position toward the remote position when the lever switch is triggered move. That is, the mechanical attraction of the lever is used to adjust the distance between the magnet and the core rod, thereby adjusting the mutual attraction magnetic force.
  • the cooking appliance includes an electromagnet circuit with an electromagnet including a core rod and a conductive winding wound around the core rod.
  • the electromagnet circuit is provided with a circuit on/off switch for controlling charging of the electromagnet.
  • the on/off of the electromagnet circuit can be controlled by the circuit on/off switch, thereby controlling whether the electromagnet is charged or not, thereby controlling the mutual attraction magnetic force.
  • the core rod in the conductive state of the circuit-on/off switch, is arranged to be movable from the approaching position toward the remote position to further insert into the conductive winding of the electromagnet.
  • the close end of the iron core rod relative to the magnet may be formed as a large end end to facilitate magnetic attraction.
  • the electromagnet circuit includes a current diverter switch for switching the direction of current flow through the electromagnet, the current diverter switch enabling the electromagnet to generate a repulsive magnetic force with respect to the magnet to open
  • the cover, or switching produces a magnetic attraction force relative to the magnet to self-lock the cover.
  • a magnetic repulsion torque M4 of a repulsive magnetic force between the magnet and the electromagnet relative to the pivot hinge point is greater than the center of gravity torque M1 of the cover.
  • the electromagnet circuit includes a sliding rheostat with a slide switch, and the sliding force of the electromagnet and the magnet is changed by the sliding switch to enable the lid to be locked or opened. That is, the magnetic attraction force is adjusted by a sliding varistor.
  • the electromagnet is an alternating current electromagnet.
  • the magnet may also be an electromagnet.
  • the cooking device may further comprise a magnetic isolation component, the magnetic isolation component comprising a magnetic spacer material with a magnetic shielding material and a magnetic isolation button of the return spring, the magnetic isolation button being capable of driving the magnetic isolation sheet between the first magnetic member and the second magnetic member in a pressed state to suppress magnetic attraction.
  • the magnetic isolation component comprising a magnetic spacer material with a magnetic shielding material and a magnetic isolation button of the return spring, the magnetic isolation button being capable of driving the magnetic isolation sheet between the first magnetic member and the second magnetic member in a pressed state to suppress magnetic attraction.
  • the magnetic isolation sheet may be formed as a frame structure having an open end, and in the button pressing state of the magnetic isolation button, the first magnetic member or the second magnetic member is limited to the frame structure. Inside.
  • the magnetic isolation component may be disposed in the seat body, and the magnetic isolation sheet is preferably an aluminum alloy sheet, a stainless steel sheet or a copper sheet or the like.
  • the cooking appliance is a rice cooker.
  • the cover body preferably has a rectangular outline, and the rectangular outline comprises a first rectangular side, a second rectangular side, a third rectangular side and a fourth rectangular side which are sequentially connected, between the cover body and the seat body a pivot hinge point formed at a midpoint of the first rectangular side, the suction assembly being disposed at a midpoint position of the third rectangular side and/or the suction assembly being disposed at the second rectangle The symmetrical position of the edge and the fourth rectangular side.
  • the conventional mechanical snap-fit structure is replaced by a suction assembly, and the two magnet units of the suction assembly can be respectively disposed on the cover body and the seat body, only when the cover is closed Position alignment. Therefore, the structure of the suction assembly is simple, the assembly is convenient, high-precision manufacturing and assembly are not required, the appearance of the product is not affected after assembly, and the user is more convenient to operate, and the opening and closing cover can be realized by merely operating the button to control the magnetic or magnetic repulsion effect.
  • FIG. 1 is a schematic view of a lid opening and closing mechanism of a cooking appliance according to a first preferred embodiment of the present invention
  • Figure 2 is a schematic view of a lid opening and closing mechanism of a cooking appliance in accordance with a second preferred embodiment of the present invention
  • FIG 3 is a schematic view of the opening and closing mechanism of the cooking appliance shown in Figure 2 in the anti-opening stage (cover self-locking);
  • Figure 4 is a schematic view of the opening and closing mechanism of the cooking appliance shown in Figure 2 in a stage requiring opening;
  • FIG. 5 is a schematic view showing the structure of the cooking appliance shown in Figure 2 after opening the lid;
  • Figure 6 is a schematic view showing the opening and closing mechanism of the cooking appliance according to the third preferred embodiment of the present invention, showing the torque analysis of the opening and closing mechanism in the anti-opening stage;
  • Figure 7 shows the torque analysis of the opening and closing mechanism of the cooking appliance shown in Figure 6 during the need to open the lid
  • Figure 8 is a schematic view of a lid opening and closing mechanism of a cooking appliance in accordance with a fourth preferred embodiment of the present invention.
  • Figure 9 is a partial enlarged view of the portion of the suction assembly of Figure 8.
  • Figure 10 is a schematic view showing the structure of the cooking appliance shown in Figure 8 in a stage in which opening is required;
  • Figure 11 is a partial enlarged view of the portion of the suction assembly of Figure 10;
  • Figure 12 is a schematic view showing the structure of the cooking appliance shown in Figure 8 after opening the lid;
  • FIG. 13 to FIG. 15 are schematic diagrams showing the opening and closing mechanism of the cooking appliance according to the fifth preferred embodiment of the present invention, which sequentially shows the processes before, after, and after the magnetic button is pressed;
  • Figure 16 illustrates various possible setting positions of the suction assembly in the rice cooker
  • Figure 17 is a circuit schematic of an exemplary current diverter switch.
  • orientation words such as “up, down, top, and bottom” are generally used for the directions shown in the drawings or for vertical, vertical or gravity directions, unless otherwise stated.
  • the components are described in terms of their positional relationship.
  • the cooking appliance includes a base 200 and a cover 100.
  • the cover 100 is pivotally mounted to the base 200 in an openable manner.
  • the pivotal connection between the base 200 and the cover 100 is provided with a pivoting spring 1 (such as a torsion spring, etc.) sleeved on the pivoting shaft 2, and the pivotal connection of the base 200 and the cover 100
  • the distal end of the portion is provided with a suction assembly for opening and closing the cover.
  • the suction assembly for opening and closing cover control may include a first suction member and a second suction member, one of the first suction member and the second suction member being disposed on the seat body 200, and the other being disposed on the cover
  • the body 100 absorbs the first suction member and the second suction member to lock the cover 100 to the base 200.
  • a vacuum suction method such as a vacuum suction method, a magnetic closure method as described in detail below, and the like.
  • the present invention uses a suction assembly instead of a conventional mechanical snap-fit structure.
  • the suction and assembly components do not need structural cooperation, no direct contact, low manufacturing precision, assembly shape accuracy, and the like, and are not limited to the exposed type, and can be made into a hidden design hidden in the product body without affecting the appearance of the product.
  • the magnet 3 can be simply mounted on the respective distal ends of the cover 100 and the base 20, and the first suction member (or the first one) A magnetic member and a second suction member (or second magnetic member) are both magnets 3.
  • the cover is closed, the cover is self-locked by the magnetic attraction between the magnets 3.
  • you need to open the cover you only need to open the cover by manual operation.
  • the magnet 3 is not limited to a permanent magnet, and may be an electromagnet in which magnetic attraction can be adjusted.
  • the suction assembly of the other embodiment includes a magnet 3 as a first suction member and an electromagnet circuit with a core rod 4 as a second suction member, a magnet 3 and an electromagnet circuit.
  • a magnet 3 is disposed at the distal end of the seat body 200, and the other is disposed at the distal end of the cover body 100, and the magnet 3 passes through the magnetic core rod 4 to lock the cover body 100.
  • there is a magnetic attraction between the iron core rod 4 itself and the magnet 3 and after the electromagnet is formed by electric conduction, the magnetic attraction force can be increased, but the tooth repulsive force may also be formed.
  • the electromagnet circuit is provided with a circuit on/off switch 5 for controlling whether the electromagnet is energized.
  • the circuit-on/off switch 5 When the circuit-on/off switch 5 is pressed so that an enhanced magnetic attraction force is generated between the electromagnet and the magnet, the circuit-on/off switch 5 constitutes a cover self-locking switch button.
  • the circuit on/off switch 5 When the circuit-on/off switch 5 is pressed so that an enhanced magnetic repulsive force is generated between the electromagnet and the magnet, the circuit on/off switch 5 constitutes an open cover button.
  • the electromagnet circuit is electrically connected to the power source of the cooking appliance, typically an alternating current electromagnet.
  • the electromagnet circuit can also be powered by itself, such as a power battery, to form a DC electromagnet.
  • the alternating current electromagnet has a relatively constant suction force, but the suction process generates slight vibration, and the winding coil of the electromagnet may overheat.
  • the DC electromagnet does not vibrate during the suction process, and the coil does not overheat, but the suction is an increasing process. Therefore, the energized forms of the electromagnets have their own advantages and disadvantages, and are specifically designed according to the specific product requirements, and will not be discussed too much here.
  • the lid body When the electromagnet circuit is electrically connected to the power source of the cooking appliance, if the product is not energized, the lid body is self-locked depending on the suction force of the magnet 3 and the iron core rod 4, and the lid body 100 is opened by human power. If the product is energized, the self-locking can be further enhanced by the electromagnet, and the polarity of the electromagnet is reversed to realize the automatic opening of the cover 100.
  • the electromagnet circuit preferably includes a current reversing switch for switching the current flowing through the electromagnet to realize the timely polarity reversal of the electromagnet when the cover is opened and closed, that is,
  • the current diverting switch can cause the electromagnet to generate a repulsive magnetic force with respect to the magnet 3 to open the cover 100, or switch to generate a magnetic attraction force with respect to the magnet 3 to self-lock the cover 100.
  • a current commutation switch can be implemented by program setting of the power control unit or by a simple bridge switch circuit, as shown in FIG.
  • two interlocking switches 9 constitute a current commutation
  • the switch can be combined with the bridge circuit to realize the flow direction switching of the electromagnet. Therefore, the external display of the current reversing switch can be a physical switch, or a virtual display button of the display screen, etc., which are common knowledge that can be known by those skilled in the art, and will not be described in detail herein.
  • the electromagnet circuit includes a sliding rheostat 8 with a sliding switch connected in parallel with the electromagnet, and the electromagnet and the magnet are changed by sliding the sliding switch.
  • the magnetic attraction of 3 makes it possible to lock or open the cover 100.
  • the sliding varistor 8 can be combined to achieve gradual adjustment control of the electromagnetic attraction force by changing the current.
  • the core rod 4 is preferably a retractable movable rod movable between a close position and a distant position with respect to the magnet 3, in the cover body.
  • the magnetic attraction force of the iron core rod 4 and the magnet 3 is large, and the cover body 100 is in a closed state, and in the distant position, the magnetic attraction force of the iron core rod 4 and the magnet 3 is weakened, and the cover body is closed.
  • 100 can be automatically pivoted open until the state after the opening is shown in FIG. In this way, the design of the movement stroke and the spacing of the iron core rod 4 can be designed to automatically lock and open the cover.
  • the minimum distance between the core rod 4 and the magnet 3 is a, and the magnet hinge 3 should be ensured with respect to the pivot joint point between the cover 100 and the base 200.
  • the sum of the pull-in torque of the magnetic attraction force between the iron core rods 4 and the center-of-gravity torque of the cover body 100 is greater than the reset torque of the pivot spring 1 to achieve the cover body lock; and in the figures shown in FIGS.
  • the minimum distance between the core rod 4 and the magnet 3 is expanded to b, and it is ensured that the sum of the pickup torque of the magnetic attraction force between the magnet 3 and the core rod 4 and the center of gravity of the cover 100 is smaller than the pivot spring 1
  • the reset torque is used to automatically open the cover 100. After the lid body 100 is opened, as shown in Fig. 12, the core rod 4 therein is reset to the position of the iron core rod shown in Figs.
  • the iron core rod 4 is cooperatively moved.
  • the cooking appliance may include a lever mechanism with a lever switch (not shown), and when the lever switch is triggered, the lever The mechanism moves the iron core rod 4 from a close position to a distant position, that is, the iron core rod 4 is moved away from the magnet 3 by an external force.
  • the lever switch is configured as a cover button.
  • the iron core rod 4 is disposed in the cover body 100, as shown in FIG. 8.
  • the lever switch can also be correspondingly disposed on the cover of the cover body 100, which is convenient for the user to press and operate.
  • the above iron core rod 4 may be a separate iron rod or iron block.
  • the suction assembly may include an electromagnet circuit provided with an electromagnet including a core rod 4 and a conductive winding wound around the core rod 4, as shown in FIG.
  • the iron core rod 4 is an induction core of the electromagnet, and in the conductive state, the core rod 4 can be magnetically attracted to move away from the magnet 3 automatically, and the state is changed from the state of Fig. 9 to the state of Fig. 11.
  • the electromagnet circuit includes a circuit on/off switch 5 as a core rod movement control valve, and in the conduction state of the circuit on/off switch 5, the iron core rod 4 moves from the approaching position toward the distant position to further insert into the conductive winding.
  • the electromagnet can also be made to generate a repulsive magnetic force with respect to the magnet 3, which is more advantageous for opening the cover 100.
  • the proximal end of the core rod 4 with respect to the magnet 3 is formed to facilitate the magnetically large end 41.
  • a magnetic isolation assembly comprising a magnetic spacer 6 disposed in a movable manner, the magnetic spacer 6 being capable of being pushed in The magnetic body and the lower magnetic body are moved out or removed to control the opening or suction of the cover 100 accordingly.
  • the open lid control mode of the magnetic isolation assembly is cheaper and easier to operate than the electromagnet magnetic pole commutation method described above.
  • the magnetic isolation component functions to controllably extend between the upper magnetic body and the lower magnetic body (ie, between the first suction member and the second suction member) to block or reduce the magnetic between the two. Suction, so as to achieve the purpose of controlling the opening.
  • the magnetic isolation assembly includes a magnetic isolation button 7 with a return spring, and the magnetic isolation button 7 is connected to the magnetic isolation sheet 6 and can drive the magnetic separation sheet 6 into the upper magnetic attraction in the button pressing state. Between the body and the lower magnetic body to suppress magnetic attraction. After the lid body 100 is opened, as shown in FIG. 15, after the magnetic flux barrier button 7 is released, the magnetic shield button 7 is smoothly returned to the state before pressing by the return spring.
  • the magnetic isolation sheet 6 may be in the form of a sheet and inserted between the upper and lower magnetic bodies, but in consideration of a better magnetic separation effect, the illustrated magnetic spacer 6 is preferably formed as a frame structure having an opening at one end. In the button pressing state of the magnetic button 7, the upper magnetic body or the lower magnetic body is completely framed in the frame structure.
  • the magnetic spacer 6 may be any material capable of resisting or suppressing magnetism, and generally, for example, aluminum, aluminum alloy sheet, stainless steel sheet or copper sheet or the like may be selected.
  • the magnetic isolation button 7 is used as an open cover case, which is preferably disposed on the base 200, as shown in FIG. 13 and FIG. 14, which prevents the cover from being touched when the cover is opened, and avoids hot steam. .
  • both the upper magnetic body and the lower magnetic body shown in FIGS. 13 to 15 exhibit a state in which the magnetic poles are attracted in the closed state.
  • the upper and lower magnetic bodies may be permanent magnets, or either the upper magnetic body and the lower magnetic body may be permanent magnets, and the other is an iron block.
  • any of the upper magnetic body and the lower magnetic body may be an electromagnet such as an alternating current electromagnet connected to an alternating current power source.
  • an electromagnet circuit of the electromagnet may be provided with a circuit on/off switch 5 for controlling whether the electromagnet 5 is energized.
  • circuit on/off switch 5, the current reversing switch, the slide switch of the sliding rheostat 8 and the magnetic isolation button 7 may be separately configured to open the lid button switch, or may be used in combination to form an open lid button combination switch or the like.
  • the above-mentioned suction assembly can be applied to various types of cooking appliances, especially in rice cookers, for opening and closing lids and lid control of the lid and the body.
  • the rice cooker on the market mostly has a rectangular shape. As shown in FIG.
  • the rectangular outline of the rice cooker includes a first rectangular side, a second rectangular side, a third rectangular side and a fourth rectangular side which are sequentially connected, and the cover body
  • the pivot hinge point between the 100 and the seat body 200 is formed at a midpoint position of the first rectangular side, that is, the pivot hinge point OO' in the figure, and the suction assembly can be disposed at the midpoint position of the third rectangular side and / or the suction assembly is disposed at a symmetrical position of the second rectangular side and the fourth rectangular side, such as the suction assembly setting positions P1, P2, P3, P4, P5 in the figure.
  • the pivoting spring 1 in the closed state of the cover 100, with respect to the pivotal hinge point between the cover 100 and the base 200 (ie, the pivotal hinge point OO' shown in FIG. 16), the pivoting spring 1 is
  • the reset torque M2 is smaller than the sum of the pull-in torque M3 of the magnetic attraction force between the magnet 3 and the core rod 4 and the center-of-gravity torque M1 of the cover 100. In this way, in the anti-opening stage, the locking cover torque is greater than the opening moment, and the cover body is self-locking.
  • the cover when the electromagnet is not energized, the magnetic attraction between the magnet 3 and the core rod 4 is relatively small, but the cover should also be self-locking.
  • it is necessary to make a margin design for the lock cover torque for example, satisfying M3-(M2-M1)>1Nm, so that the internal pressure of the cooking appliance can be satisfied, and the cover body can be automatically opened.
  • the conductive winding wound around the iron core rod 4 enhances the magnetic attraction force
  • the conductive electromagnet enhances the self-locking performance of the cover body, and is more compatible with the above-mentioned margin of the lock cap torque.
  • the current flowing through the electromagnet can be switched by the current commutating switch so that the electromagnet generates a repulsive magnetic force with respect to the magnet 3 to open the cap 100.
  • the magnetic repulsive torque M4 of the repulsive magnetic force between the magnet 3 and the electromagnet and the reset torque of the pivoting spring 1 with respect to the pivotal hinge point The sum of M2 is greater than the center of gravity torque M1 of the cover 100, that is, the upward moment in FIG. 7 is greater than the downward moment, and the cover 100 can be opened.
  • M4+M2-M1>1Nm is required to prevent accidental vibration or collision from opening the cover or automatically due to internal pressure. turn on.
  • the corresponding torsion spring, magnet, etc. can be selected according to the design parameters to achieve the opening and closing cover control according to the design requirements.
  • the present invention designs a novel magnetic closure mechanism for opening and closing the cover, which can be applied to products such as rice cookers.
  • the cover body can be self-locked by the cover magnetic method.
  • the magnetic attraction force can be quickly reduced by, for example, a conventional simple button method, the cover body can be safely opened without increasing the product cost, and can be hidden in the cover body and the seat body. Does not affect the appearance of the product at all.
  • the portion of the magnetic locking mechanism located in the cover body can be opposite to the portion located in the seat body; the electromagnets are not limited to those illustrated in the cover body, but can also be disposed on the seat body, even the cover body and the seat body.
  • the upper magnet can be set as an electromagnet, and the current magnitude control of the electromagnet is not limited to the sliding varistor mode, and the current can be supplied to the appropriate current by the external current supply unit, and the like, and these simple modifications are all within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)
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Abstract

一种烹饪器具，包括座体(200)、可开合地枢转安装于座体(200)上的盖体(100)、设置在座体(200)与盖体(100)之间的枢转连接部的枢转弹簧(1)以及设置在座体(200)和盖体(100)的相对于枢转连接部的远端的吸合组件，吸合组件用于磁性开合盖并可包括磁体(3)和铁芯棒(4)，磁体(3)和铁芯棒(4)中的一者设置在座体(200)的远端，另一者设置在盖体(100)的远端，磁体(3)通过磁吸铁芯棒(4)以锁合盖体(100)；其中，在盖体(100)的合盖状态下，相对于盖体(100)与座体(200)之间的枢转铰接点，枢转弹簧(1)的复位扭矩M2小于磁体(3)与铁芯棒(4)之间的磁吸合力的吸合扭矩M3与盖体(100)的重心扭矩M1之和，以达到盖体(100)自锁的目的。烹饪器具的开合盖结构简单、组装方便、参数设计合理、开合盖控制精准，便于用户操作。

Description

烹饪器具 技术领域
本发明涉及家用电器领域，具体地，涉及一种烹饪器具。
背景技术
在电饭煲等家电产品中，为了方便上盖扣合于煲体，通常会设计一套锁盖机构进行锁扣，这种锁盖机构通常为按压式锁扣机构等机械式卡扣锁合结构。
在产品上增设的机械式卡扣锁合结构需要结构紧凑，占用空间小，以免过多影响产品外观，但或多或少都使得产品外观比较复杂，影响了产品外观设计。
另外，为了保证开合盖的顺利操作，机械式卡扣锁合结构不仅需要尺寸小，而且尺寸必须做的非常精确，否则就会就现脱扣或合不上盖等现象，直接影响用户使用。
此外，机械式卡扣锁合按钮通常设置在盖体上，用户操作时还容易被高温蒸汽烫手。
发明内容
本发明的目的是提供一种烹饪器具，其开合盖结构简单、成本低，控制精准，且便于用户操作。
为了实现上述目的，本发明提供一种烹饪器具，包括座体和盖体，所述盖体可开合地枢转安装于所述座体上，所述烹饪器具还包括：
枢转弹簧，设置在所述座体与盖体之间的枢转连接部；和
吸合组件，包括第一吸合件和第二吸合件，所述第一吸合件和所述第二吸合件中的一者设置在所述座体，另一者设置在所述盖体，所述第一吸合件与所述第二吸合件相吸以将所述盖体锁合于所述座体。
优选地，在所述盖体的合盖状态下，相对于所述盖体与所述座体之间的枢转铰接点，所述枢转弹簧的复位扭矩M2小于所述磁体与铁芯棒之间的磁吸合力的吸合扭矩M3与所述盖体的重心扭矩M1之和。
进一步地，满足M3-(M2-M1)>1Nm。
进一步地，满足M3-(M2-M1)<15Nm。
可选择地，所述吸合组件优选为磁吸锁合组件并设置在相对于所述枢转连接部的 远端。
所述吸合组件可包括分别作为所述第一吸合件和第二吸合件的第一磁吸件和第二磁吸件，所述第一磁吸件和所述第二磁吸件中的一者设置在所述座体，另一者设置在所述盖体，所述第一磁吸件与所述第二磁吸件磁吸配合以将所述盖体锁合于所述座体。
在一种具体实施方式中，所述第一吸合件为磁体，所述第二吸合件为铁芯棒。磁体可以是永磁铁，也可是电磁铁，铁芯棒可以是单独铁棒或铁块，也可以是电磁铁的铁芯。
其中优选地，所述铁芯棒为能够在所述盖体的合盖状态下在相对于所述磁体的靠近位置与远离位置之间移动的伸缩活动杆；
其中，在所述靠近位置，相对于所述盖体与所述座体之间的枢转铰接点，所述磁体与铁芯棒之间的磁吸合力的吸合扭矩M3与所述盖体的重心扭矩M1之和大于所述枢转弹簧的复位扭矩M2以锁合所述盖体；
在所述远离位置，所述磁体与铁芯棒之间的磁吸合力的吸合扭矩M3与所述盖体的重心扭矩M1之和小于所述枢转弹簧的复位扭矩M2以打开所述盖体。
优选地，所述烹饪器具还包括带有拨杆开关的拨杆机构，在触发所述拨杆开关时，所述拨杆机构将所述铁芯棒从所述靠近位置朝向所述远离位置拨动。即，通过拨杆的机械式拨动以调节磁体与铁芯棒的间距，从而调节互吸磁力。
进一步地，所述烹饪器具包括带有电磁铁的电磁铁回路，所述电磁铁包括铁芯棒和缠绕于所述铁芯棒的导电绕组。
优选地，所述电磁铁回路设有用于控制所述电磁铁带电的电路通断开关。可通过电路通断开关控制电磁铁回路的通断，从而控制电磁铁带电与否，进而控制互吸磁力。
更优选地，在所述电路通断开关的导通状态下，所述铁芯棒设置为能够从所述靠近位置朝向所述远离位置移动以进一步插入所述电磁铁的导电绕组内。其中，所述铁芯棒的相对于磁体的靠近端可形成为大头端，以利于磁吸合。
优选地，所述电磁铁回路包括用于切换流经所述电磁铁的电流流向的电流换向开关，所述电流换向开关能够使得所述电磁铁产生相对于所述磁体的排斥磁力以打开所述盖体，或切换产生相对于所述磁体的磁吸合力以使所述盖体自锁。
优选地，在所述盖体的合盖状态以及所述电磁铁的导电状态下，相对于所述枢转铰接点，所述磁体与所述电磁铁之间的排斥磁力的磁斥扭矩M4与所述枢转弹簧的复位扭矩M2之和大于所述盖体的重心扭矩M1。
进一步地，满足M4+M2-M1>1Nm。
优选地，上述电磁铁回路包括带滑动开关的滑动变阻器，通过拨动所述滑动开关以改变所述电磁铁与所述磁体的磁吸合力，使得能够锁合或打开所述盖体。即通过滑动变阻器调节磁吸力大小。
优选地，所述电磁铁为交流电磁铁。
优选地，所述磁体也可为电磁铁。
此外优选地，所述吸合组件包括第一磁吸件和第二磁吸件时，所述烹饪器具还可包括隔磁组件，所述隔磁组件包括隔磁材质的隔磁片和带有复位弹簧的隔磁按钮，所述隔磁按钮能够在被按压状态下驱动所述隔磁片伸入所述第一磁吸件与第二磁吸件之间以抑制磁吸。
其中，所述隔磁片可形成为一端开口的框体结构，在所述隔磁按钮的按钮按压状态下，所述第一磁吸件或第二磁吸件被框限于所述框体结构内。
其中，所述隔磁组件可设置于所述座体中，所述隔磁片优选为铝合金片材、不锈钢片材或铜片材等等。
优选地，所述烹饪器具为电饭煲。其中，所述盖体优选为矩形轮廓，所述矩形轮廓包括依次连接的第一矩形边、第二矩形边、第三矩形边和第四矩形边，所述盖体与所述座体之间的枢转铰接点形成在所述第一矩形边的中点位置，所述吸合组件设置在所述第三矩形边的中点位置和/或所述吸合组件设置在所述第二矩形边和所述第四矩形边的对称位置。
在根据本发明的烹饪器具中，采用吸合组件取代常规的机械式卡扣锁合结构，吸合组件的两个磁体单元可分别设置在盖体和座体上，只需在盖合时上下位置对齐。因此，吸合组件的结构简单、组装方便，无需高精度制造和组装，组装后也不影响产品外观，更便于用户操作，只需操纵按键控制磁吸或磁斥效果即可实现开合盖。在此结构基础上，通过优化参数设计等，可达到很好的盖体自锁和自动开盖效果，而且节约能耗，延长使用寿命，整体成本低廉，可更多地应用于不同的烹饪器具中。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1为根据本发明的第一优选实施方式的烹饪器具的开合盖机构的示意图；
图2为根据本发明的第二优选实施方式的烹饪器具的开合盖机构的示意图；
图3为图2所示的烹饪器具在防开盖阶段(盖自锁)的开合盖机构的示意图；
图4为图2所示的烹饪器具在需要开盖阶段的开合盖机构的示意图；
图5为图2所示的烹饪器具在开盖后的结构示意图；
图6为根据本发明的第三优选实施方式的烹饪器具的开合盖机构的示意图，图中展示了防开盖阶段的开合盖机构的力矩分析；
图7展示了图6所示的烹饪器具在需要开盖阶段的开合盖机构的力矩分析；
图8为根据本发明的第四优选实施方式的烹饪器具的开合盖机构的示意图；
图9为图8中的吸合组件部分的局部放大图；
图10为图8所示的烹饪器具在需要开盖阶段的结构示意图；
图11为图10中的吸合组件部分的局部放大图；
图12为图8所示的烹饪器具在开盖后的结构示意图；
图13至图15为根据本发明的第五优选实施方式的烹饪器具的开合盖机构的示意图，依次展示了隔磁按钮按键前、按键后以及开盖后的过程；
图16图示了在电饭煲中的吸合组件的各个可行的设置位置；和
图17为一种示例的电流换向开关的电路原理图。
附图标记说明
1    枢转弹簧      2    枢转轴
3    磁体          4    铁芯棒
5    电路通断开关  6    隔磁片
7    隔磁按钮      8    滑动变阻器
9    联动开关 
41   大头端        OO’ 枢转铰接点
100  盖体          200 座体
P1～P5   吸合组件设置位置
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描 述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
在本发明中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底”通常是针对附图所示的方向而言的或者是针对竖直、垂直或重力方向上而言的各部件相互位置关系描述用词。
本发明提供了一种新型烹饪器具，参见图1，该烹饪器具包括座体200和盖体100，盖体100可开合地枢转安装于座体200上。其中，座体200与盖体100之间的枢转连接部设有套设在枢转轴2上的枢转弹簧1(例如扭簧等)，座体200和盖体100的相对于枢转连接部的远端设有用于开合盖的吸合组件。
用于开合盖控制的吸合组件可包括第一吸合件和第二吸合件，第一吸合件和第二吸合件中的一者设置在座体200，另一者设置在盖体100，第一吸合件与第二吸合件相吸以将盖体100锁合于座体200。这种吸合组件的吸合方式也有多种，例如可以是真空吸合方式，也可以是以下将细述的磁吸锁合方式等等。
显然，本发明产品中采用了吸合组件取代传统的机械式卡扣锁合结构。吸合组件无需结构配合、无需直接接触，制造精度、装配形位精度等要求低，甚至不限于外露式，可做成藏身于产品本体内的隐藏式设计，完全不影响产品外观。
在图1所示的一种实施方式中，只需在盖体100和座体20的各自远端分别安装磁体3，即可简单实现磁吸扣合，其中第一吸合件(或称第一磁吸件)和第二吸合件(或称第二磁吸件)均为磁体3。在合盖时，通过磁体3之间的磁吸力实现盖体自锁。在需要开盖时，只需通过手动操作人力开盖即可。
磁体3不限于永磁铁，也可以是磁吸力可调节的电磁铁等。如图2所示，另一者实施方式的吸合组件包括作为第一吸合件的磁体3和带有作为第二吸合件的铁芯棒4的电磁铁回路，磁体3和电磁铁回路中的一者设置在座体200的远端，另一者设置在盖体100的远端，磁体3通过磁吸铁芯棒4以锁合盖体100。其中，铁芯棒4自身与磁体3之间存在磁吸力，通过导电形成电磁铁后，可增加磁吸力，但也可能形成齿斥力。这样便可进一步地借助电磁铁回路实现自动开合盖。例如，在图3的防开盖阶段，需要实现盖体自锁，因此使电磁铁与磁体之间产生增强的磁吸力，即图中箭头所示的Fa。在图4所示的需要开盖阶段，则调转电磁铁的极性，使得电磁铁与磁体之间产生磁斥力Fb，以自动开盖，自动开盖后如图5所示。
如图2所示，电磁铁回路设有电路通断开关5，用于控制电磁铁是否带电。当电路通断开关5按下，使得电磁铁与磁体之间产生增强的磁吸力时，该电路通断开关5构成 盖体自锁开关按钮。当电路通断开关5按下，使得电磁铁与磁体之间产生增强的磁斥力时，该电路通断开关5构成开盖按钮。
通常，电磁铁回路电连接烹饪器具的电源，即一般为交流电磁铁。当然，电磁铁回路也可自带电源，例如电源电池，构成直流电磁铁。本领域技术人员通晓的是，交流电磁铁具有吸力较为恒定的特点，但吸合过程会产生轻微振动，电磁铁的绕组线圈有可能过热。直流电磁铁则在吸合过程不会产生振动，线圈不会过热，但吸力是个渐增过程。因此，电磁铁的通电形式各有优缺点，根据具体产品需要具体设计，在此不再过多论述。
在电磁铁回路电连接烹饪器具的电源时，若产品不通电，则依赖于磁体3与铁芯棒4的吸合力实现盖体自锁，通过人力打开盖体100。若产品通电，则可通过电磁铁进一步增强自锁，通过电磁铁的极性换向，实现盖体100的自动打开。
其中，无论是连接交流电源或直流电源，电磁铁回路均优选地包括用于切换流经电磁铁的电流流向的电流换向开关，以实现开合盖时适时的电磁铁极性换向，即电流换向开关能够使得电磁铁产生相对于磁体3的排斥磁力以打开盖体100，或切换产生相对于磁体3的磁吸合力以使盖体100自锁。这种电流换向开关可通过电源控制单元的程序设定来实现，也可通过简单的桥接开关电路来实现，如图17所示，在一种示例中，两个联动开关9构成电流换向开关，即可结合桥接电路实现电磁铁的流向切换。因此电流换向开关的外显可以是实体开关，也可以是显示屏的虚拟显示按键等，这些都是本领域技术人员能够知晓的公知常识，在此不再细述。
特别地，为进一步实现磁吸力或磁斥力的大小渐变调节，方便自锁或自动开盖，可改变电磁铁回路中的电流大小。同样的，本领域技术人员能够了解的是，这种电流大小调节可通过各种简单的外部电路实现或控制器控制。在本发明的一种具体实施方式中，如图6、图7所示，电磁铁回路包括了与电磁铁并联的带有滑动开关的滑动变阻器8，通过拨动滑动开关以改变电磁铁与磁体3的磁吸合力，使得能够锁合或打开盖体100。这样，可结合滑动变阻器8以通过改变电流来实现电磁吸合力的渐变调节控制。
如图8至图12所示，在本发明的另一优选实施方式中，铁芯棒4优选为能够在相对于磁体3的靠近位置与远离位置之间移动的可伸缩活动杆，在盖体100的合盖状态下，在靠近位置，铁芯棒4与磁体3的磁吸力较大，盖体100呈合盖状态，在远离位置，铁芯棒4与磁体3的磁吸力减弱，盖体100可自动枢转打开，直至图12所示的开盖后状态。这样，可通过设计铁芯棒4的移动行程、间距等参数设计，很好的完成自动锁盖、开盖。
具体的，在图8、图9所示的靠近位置，铁芯棒4与磁体3的最小间距为a，相对于盖体100与座体200之间的枢转铰接点，应确保磁体3与铁芯棒4之间的磁吸合力的吸合扭矩与盖体100的重心扭矩之和大于枢转弹簧1的复位扭矩，以实现盖体锁合；而在在图10、图11所示的远离位置，铁芯棒4与磁体3的最小间距扩大为b，应确保磁体3与铁芯棒4之间的磁吸合力的吸合扭矩与盖体100的重心扭矩之和小于枢转弹簧1的复位扭矩，以自动打开盖体100。打开盖体100后，如图12所示，其中的铁芯棒4重新复位至图8、图9所示的铁芯棒位置。
为实现开合盖而使铁芯棒4配合移动，在一种实现方式中，烹饪器具可包括带有拨杆开关的拨杆机构(图中未显示)，在触发拨杆开关时，拨杆机构将铁芯棒4从靠近位置拨动至远离位置，即依靠外力移动铁芯棒4远离磁体3。这样，拨杆开关构成为开盖按钮。通常，铁芯棒4设置在盖体100内，如图8所示，此时拨杆开关也可相应地设置在盖体100的面盖上，方便用户按压操作。
以上的铁芯棒4可以是单独的铁棒或铁块。进一步地，吸合组件可包括设有电磁铁的电磁铁回路，如图9所示，电磁铁包括铁芯棒4和缠绕于铁芯棒4的导电绕组。此时，铁芯棒4为电磁铁的感应铁芯，在导电状态下，可使得铁芯棒4被磁吸以自动远离磁体3，从图9状态变更至图11状态。此时，电磁铁回路包括作为铁芯棒移动控制阀的电路通断开关5，在电路通断开关5的导通状态下，铁芯棒4从靠近位置朝向远离位置移动以进一步插入导电绕组内。进一步地，在电路通断开关5的导通状态下，还可让电磁铁产生相对于磁体3的排斥磁力，更有利于打开盖体100。其中优选地，铁芯棒4的相对于磁体3的靠近端形成为便于磁吸的大头端41。
在如图13至图15所示的本发明的另一优选实施方式中，还增设了隔磁组件，该隔磁组件包括移动设置的隔磁片6，该隔磁片6能够被推入上磁吸体与下磁吸体之间或移出以相应控制打开或吸合盖体100。这种隔磁组件的开盒盖控制方式，相较于上述的电磁铁磁极换向方式，成本更为低廉，操作也简单方便。
其中，隔磁组件的作用在于可控地伸入上磁吸体与下磁吸体之间(即第一吸合件与第二吸合件之间)以阻绝或减少二者之间的磁吸力，从而达到控制开盖的目的。
具体地，如图13所示，该隔磁组件包括带有复位弹簧的隔磁按钮7，隔磁按钮7连接隔磁片6并在按钮按压状态下能够驱动隔磁片6伸入上磁吸体与下磁吸体之间以抑制磁吸。在盖体100打开后，如图15所示，松开隔磁按钮7后，隔磁按钮7通过复位弹簧顺利复位至按压前状态。
其中，隔磁片6可以呈片状，插入上、下磁吸体之间，但考虑到更好的隔磁效果，图示的隔磁片6优选地形成为一端开口的框体结构，在隔磁按钮7的按钮按压状态下，上磁吸体或下磁吸体被完整地框限于框体结构内。
隔磁片6可以是任何能够阻磁或抑磁的材质，通常可选用例如铝材、铝合金片材、不锈钢片材或铜片材等等。
由于盖体100需要枢转打开，隔磁按钮7作为开盖案件，其优选地设置于座体200，如图13、图14所示，这样可防止开盖时触及盖体，避免高温蒸汽烫手。
需要说明的是，图13至图15所示的上磁吸体和下磁吸体均在合盖状态下呈现磁极相吸的状态。上、下磁吸体可以均为永磁铁，或者上磁吸体和下磁吸体中的任一者为永磁铁，另一者为铁块。而且，上磁吸体和下磁吸体中的任一者还可以是电磁铁，例如连接交流电源的交流电磁铁。电磁铁的电磁铁回路中优选地可设有电路通断开关5，用于控制电磁铁5是否带电。
需要说明的是，电路通断开关5、电流换向开关、滑动变阻器8的滑动开关以及隔磁按钮7等可单独构成开盖按钮开关，也可结合使用，成为开盖按钮组合开关等。
上述的吸合组件可应用至多种类型的烹饪器具中，尤其是电饭煲中，用于煲盖与煲体的开合盖及锁盖控制。具体应用时，市面上的电饭煲等多为矩形形状，如图16所示，电饭煲的矩形轮廓包括依次连接的第一矩形边、第二矩形边、第三矩形边和第四矩形边，盖体100与座体200之间的枢转铰接点形成在第一矩形边的中点位置，即图中的枢转铰接点OO’，吸合组件则可设置在第三矩形边的中点位置和/或吸合组件设置在第二矩形边和第四矩形边的对称位置，例如图中的吸合组件设置位置P1、P2、P3、P4、P5。
以上阐述了用于食物料理中的吸合组件的各种具体实施方式。在具体应用时，对各结构参数的设计需根据开合盖需求进行具体设定。
参见图6，在盖体100的合盖状态下，相对于盖体100与座体200之间的枢转铰接点(即图16所示的枢转铰接点OO’)，枢转弹簧1的复位扭矩M2小于磁体3与铁芯棒4之间的磁吸合力的吸合扭矩M3与盖体100的重心扭矩M1之和。这样，方可在防开盖阶段，使得锁盖力矩大于开盖力矩，实现盖体自锁。
具体地，在各种具体实施方式中，当电磁铁不通电时，磁体3与铁芯棒4之间的磁吸合力相对小，但也应能够实现盖体自锁。为确保盖体自锁的安全可靠性，需要对锁盖力矩提出余量设计，例如满足M3-(M2-M1)>1Nm，这样可满足烹饪器具的内压等导 致盖体自动打开。
当存在电磁铁回路时，缠绕于铁芯棒4的导电绕组增强了磁吸合力，导电电磁铁增强盖体自锁性能，更能符合上述的锁盖力矩的余量设计。但为了提高磁感应效率，在电磁铁的导电状态下，优选地满足：M3-(M2-M1)<15Nm，以有助于实现产品的低功耗，延长电器件寿命。
参见图7，在合盖状态下的需要开盖阶段，可通过电流换向开关切换流经电磁铁的电流流向，使得电磁铁产生相对于磁体3的排斥磁力以打开盖体100。在此状况下，当处于盖体100的合盖状态以及电磁铁导电时，相对于枢转铰接点，磁体3与电磁铁之间的排斥磁力的磁斥扭矩M4与枢转弹簧1的复位扭矩M2之和大于盖体100的重心扭矩M1，即图7中的向上力矩大于向下力矩，可打开盖体100。
同样的，为确保开盖的可靠性，需对开盖力矩提出余量设计，例如需满足M4+M2-M1>1Nm，以防止意外振动或碰撞造成开盖或因为内压等导致盖体自动打开。
根据以上力矩分析，可有目的性地根据设计参数选择相应的扭簧、磁铁等，以达到合乎设计要求的开合盖控制。
综上，本发明设计了一种用于开合盖的新型磁吸锁合机构，可应用于电饭煲等产品中。通过上下磁体的磁体吸合方式，当在某些操作程序(如洗米过程)中盖体不能被打开时，可通过合盖磁吸方式达到盖体自锁。在需要打开盖体时，仅需通过例如传统的简单按钮方式，即可快速减少磁吸合力，保证盖体安全打开，又不会增加太多的产品成本，而且可隐藏于盖体和座体内，完全不影响产品外观。
以上结合附图详细描述了本发明的优选实施方式，但是，本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，例如磁吸锁合机构的位于盖体中的部分可与其位于座体中的部分对调；电磁铁不限于图示的均设置在盖体上，也可设置在座体上，甚至盖体和座体上的磁体均可设为电磁铁，电磁铁的电流大小控制也不限于滑动变阻器方式，同样可以通过外部的电流供给单元配给合适大小的电流，诸如此类，这些简单变型均属于本发明的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。

Claims (21)

  1. 一种烹饪器具，包括座体(200)和盖体(100)，所述盖体(100)可开合地枢转安装于所述座体(200)上，其中，所述烹饪器具还包括：
    枢转弹簧(1)，设置在所述座体(200)与盖体(100)之间的枢转连接部；和
    吸合组件，包括第一吸合件和第二吸合件，所述第一吸合件和所述第二吸合件中的一者设置在所述座体(200)，另一者设置在所述盖体(100)，所述第一吸合件与所述第二吸合件相吸以将所述盖体(100)锁合于所述座体(200)。
  2. 根据权利要求1所述的烹饪器具，其中，在所述盖体(100)的合盖状态下，相对于所述盖体(100)与所述座体(200)之间的枢转铰接点，所述枢转弹簧(1)的复位扭矩M2小于所述第一吸合件与所述第二吸合件的吸合扭矩M3与所述盖体(100)的重心扭矩M1之和。
  3. 根据权利要求2所述的烹饪器具，其中，M3-(M2-M1)>1Nm，M3-(M2-M1)<15Nm。
  4. 根据权利要求1所述的烹饪器具，其中，所述吸合组件为设置在相对于所述枢转连接部的远端的磁吸锁合组件。
  5. 根据权利要求4所述的烹饪器具，其中，所述磁吸锁合组件包括作为所述第一吸合件的磁体(3)以及作为所述第二吸合件的铁芯棒(4)。
  6. 根据权利要求5所述的烹饪器具，其中，所述烹饪器具还包括带有拨杆开关的拨杆机构，在触发所述拨杆开关时，所述拨杆机构将所述铁芯棒(4)从所述靠近位置朝向所述远离位置拨动。
  7. 根据权利要求5所述的烹饪器具，其中，所述铁芯棒(4)为能够在所述盖体(100)的合盖状态下在相对于所述磁体(3)的靠近位置与远离位置之间移动的伸缩活动杆；
    其中，在所述靠近位置，相对于所述盖体(100)与所述座体(200)之间的枢转 铰接点，所述磁体(3)与铁芯棒(4)之间的磁吸合力的吸合扭矩M3与所述盖体(100)的重心扭矩M1之和大于所述枢转弹簧(1)的复位扭矩M2以锁合所述盖体(100)；
    在所述远离位置，所述磁体(3)与铁芯棒(4)之间的磁吸合力的吸合扭矩M3与所述盖体(100)的重心扭矩M1之和小于所述枢转弹簧(1)的复位扭矩M2以打开所述盖体(100)。
  8. 根据权利要求5所述的烹饪器具，其中，所述烹饪器具包括带有电磁铁的电磁铁回路，所述电磁铁包括所述铁芯棒(4)和缠绕于所述铁芯棒(4)的导电绕组。
  9. 根据权利要求8所述的烹饪器具，其中，所述电磁铁回路中设有用于控制所述电磁铁带电的电路通断开关(5)。
  10. 根据权利要求9所述的烹饪器具，其中，在所述电路通断开关(5)的导通状态下，所述铁芯棒(4)从所述靠近位置朝向所述远离位置移动以进一步插入所述电磁铁的导电绕组内。
  11. 根据权利要求10所述的烹饪器具，其中，所述铁芯棒(4)的相对于磁体(3)的靠近端形成为大头端(41)。
  12. 根据权利要求8所述的烹饪器具，其中，所述电磁铁回路包括用于切换流经所述电磁铁的电流流向的电流换向开关，所述电流换向开关能够使得所述电磁铁产生相对于所述磁体(3)的排斥磁力以打开所述盖体(100)，或切换产生相对于所述磁体(3)的磁吸合力以使所述盖体(100)自锁。
  13. 根据权利要求12所述的烹饪器具，其中，在所述盖体(100)的合盖状态以及所述电磁铁的导电状态下，相对于所述枢转铰接点，所述磁体(3)与所述电磁铁之间的排斥磁力的磁斥扭矩M4与所述枢转弹簧(1)的复位扭矩M2之和大于所述盖体(100)的重心扭矩M1，且M4+M2-M1>1Nm。
  14. 根据权利要求8所述的烹饪器具，其中，所述电磁铁为交流电磁铁。
  15. 根据权利要求8～14中任意一项所述的烹饪器具，其中，所述电磁铁回路设有带滑动开关的滑动变阻器(8)，通过拨动所述滑动开关以改变所述电磁铁与所述磁体(3)的磁吸合力，使得能够锁合或打开所述盖体(100)。
  16. 根据权利要求5所述的烹饪器具，其中，所述磁体(3)为电磁铁。
  17. 根据权利要求4所述的烹饪器具，其中，所述磁吸锁合组件包括第一磁吸件和第二磁吸件，所述烹饪器具还包括隔磁组件，所述隔磁组件包括隔磁材质的隔磁片(6)和带有复位弹簧的隔磁按钮(7)，所述隔磁按钮(7)能够在被按压状态下驱动所述隔磁片(6)伸入所述第一磁吸件与第二磁吸件之间以抑制磁吸并打开所述盖体(100)。
  18. 根据权利要求17所述的烹饪器具，其中，所述隔磁片(6)形成为一端开口的框体结构，在所述隔磁按钮(7)的按钮按压状态下，所述第一磁吸件或第二磁吸件被框限于所述框体结构内。
  19. 根据权利要求17所述的烹饪器具，其中，所述隔磁组件设置于所述座体(200)中，所述隔磁片(6)为铝合金片材、不锈钢片材或铜片材。
  20. 根据权利要求1所述的烹饪器具，其中，所述烹饪器具为电饭煲。
  21. 根据权利要求20所述的烹饪器具，其中，所述盖体(100)为矩形轮廓，所述矩形轮廓包括依次连接的第一矩形边、第二矩形边、第三矩形边和第四矩形边，所述盖体(100)与所述座体(200)之间的枢转铰接点形成在所述第一矩形边的中点位置，所述吸合组件设置在所述第三矩形边的中点位置和/或所述吸合组件设置在所述第二矩形边和所述第四矩形边的对称位置。
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