JP2017062224A - Weight sensor for microwave oven, weight sensing means and sensing elastic piece for the same, and microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight sensor for a microwave oven, weight sensing means and a sensing elastic piece for the same, and a microwave oven having the weight sensor.SOLUTION: A sensing elastic piece of a weight sensor 2 includes an attachment piece, a pressing piece, and an elastic connection piece. The pressing piece and the attachment piece are disposed at an interval from each other, and the elastic connection piece is connected to the pressing piece and the attachment piece. In the sensing elastic piece of the weight sensor according to the present invention, the elastic connection piece is connected to the pressing piece. Thus, the own gravity of an article presses the sensing elastic piece so that strain is caused in the sensing elastic piece, the capacitance is changed, and the weight of a food is estimated on the basis of the change of the capacitance.SELECTED DRAWING: Figure 3

Description

  The present invention relates to the field of household appliances for kitchens, and in particular, a sensing elastic piece of a weight sensor, a weight sensing means of a weight sensor provided with the sensing elastic piece, a weight sensor for a microwave oven provided with the weight sensing means, and the weight sensor Relates to a microwave oven equipped with

  Microwave ovens can be used to achieve purposes such as heating and disinfection. Related art microwave ovens heat and disinfect food by artificially setting the time, which is inconvenient to use. The weight sensor for detecting the weight in the related art microwave oven and the driving device for driving the rotation of the turntable are two independent parts. In the related art, a drive shaft is provided in the lower part of the microwave oven, and the drive shaft enters the housing and drives the rotation of the turntable connected thereto. Accordingly, it is necessary to provide a shaft hole that fits with the drive shaft at the bottom of the housing. In the process of using the microwave oven, if a large gap appears between the drive shaft and the shaft hole, microwave leakage occurs and the safety of the microwave oven is reduced.

  The present invention aims to solve at least one of the technical problems existing in the prior art to some extent. Therefore, an object of the present invention is to provide a sensing elastic piece of a weight sensor for estimating the weight of food.

  Another object of the present invention is to provide a weight sensing means having the sensing elastic piece.

  It is still another object of the present invention to provide a weight sensor for a microwave oven having the weight sensing means and having a driving action and a gravity sensing action.

  Another object of the present invention is to provide a microwave oven provided with the weight sensor, which has the advantages of preventing leakage of microwaves and high safety.

  The sensing elastic piece of the weight sensor according to the first aspect of the present invention includes an attachment piece, a push piece, and an elastic connecting piece, and the push piece and the attachment piece are arranged at an interval. The elastic connection piece is connected to the push piece and the attachment piece, respectively.

  The sensing elastic piece of the weight sensor according to the present invention connects the elastic connecting piece and the push piece, and presses against the sensing elastic piece by the gravity of the food itself, thereby causing distortion in the sensing elastic piece. The weight of the food can be estimated by changing the capacitance and changing the capacitance.

  Further, the sensing elastic piece of the weight sensor of the present invention further has the following additional technical features.

  According to an embodiment of the present invention, a plurality of the attachment pieces are arranged around the push piece with a space therebetween, and the elastic connection pieces correspond one-to-one with the plurality of attachment pieces. It is a plurality, and both ends are connected to the push piece and the attachment piece corresponding to the push piece, respectively. Due to the distortion of the elastic connecting piece, the change range of the capacitance of the capacitor structure can be increased, and the accuracy of the detection effect can be improved.

  Specifically, the elastic connecting piece is connected to one of the two attachment pieces adjacent to each other, and the other end of the elastic connection piece is opposed to the two attachment pieces. It is connected with.

  More specifically, the elastic connection piece includes a first branch part and a second branch part, and the first branch part is connected to the attachment piece corresponding to one end and the other end attached to the attachment part. The second branch portion extends toward another attachment piece adjacent to the piece, and one end of the second branch portion is connected to the free end of the first branch portion, and the other end is around the push piece. Extending along the radial direction and coupled to the push piece.

  Optionally, the elastic connecting piece is L-shaped.

  Optionally, the feature is that a plurality of the elastic connecting pieces are arranged evenly spaced around the pushing piece and arranged to be centrosymmetric with respect to the pushing piece. There is to be. The centrally symmetrical design can make the receiving force of the push piece more uniform, and improve the reliability and sensitivity of the sensing elastic piece.

  A reinforcing flange is connected between two adjacent mounting portions, and the reinforcing flange extends in a direction away from a plane on which the mounting piece is located.

  According to one embodiment of the present invention, the push piece is provided in parallel with the attachment piece, and a surface on one side of the push piece is provided to be recessed with respect to a surface on the same side of the attachment piece. ing.

  Furthermore, a contact protruding from the surface of the push piece is formed on the push piece.

  Optionally, the sensing elastic piece is integrally molded.

  The weight sensing means of the weight sensor according to the second aspect of the present invention comprises a circuit board, a stator electrically connected to the circuit board, and the sensing elastic piece on the first surface, and the sensing elasticity. Capacitor structure in which a piece is connected to the circuit board, and the push piece of the sensing elastic piece is opposed to the stator and is spaced according to deformation of the capacitive sensing elastic piece Is formed.

  According to the weight sensing means of the present invention, by providing the sensing elastic piece on the first surface as described above, the sensing elastic piece is pressed against the sensing elastic piece by the gravity of the food itself, and the sensing elastic piece is distorted. The weight of the food can be estimated by changing the capacitance and changing the capacitance.

  Specifically, the stator is formed on the circuit board, and the attachment piece of the sensing elastic piece is connected to the circuit board.

  Optionally, the pushing piece is parallel to the mounting piece, and a surface of the pushing piece facing the stator is provided so as to be recessed with respect to the same side surface of the attaching piece. ing.

  Further, a through hole corresponding to a part of the push piece is formed in the circuit board.

  Specifically, the through hole faces an intermediate portion of the push piece, and the push piece is provided with a contact that protrudes with respect to the through hole.

  Further, a mica sheet located on the surface of the sensing elastic piece on the side away from the circuit board is connected to the circuit board.

  A weight sensor for a microwave oven according to a third aspect of the present invention includes a support member, a driving means provided on the support member, and the weight sensing means according to the second aspect described above, and the weight sensing means. The pushing piece of the sensing elastic piece and the driving means are connected.

  According to the weight sensor for a microwave oven of the present invention, by providing the weight sensing means described in the second aspect described above, the heating time can be automatically set based on the weight of the food, and the operation is performed. It will be easy.

  A weight sensor for a microwave oven according to a third aspect of the present invention is provided with a support member, a drive means provided on the support member, and provided on the support member and coupled to the drive means. The weight sensing means of the weight sensor as described in the embodiment of the second aspect of the invention is provided.

  According to the weight sensor for the microwave oven of the embodiment of the present invention, the driving means and the weight sensing means are integrated together, whereby the rotation of the components such as the turntable can be quickly driven by the driving means. The weight of the article can be detected by the sensing means, and the accuracy of the detection result of the weight sensing means is transmitted by transmitting the displacement (that is, a minute displacement generated when an article having a different weight is placed on the turntable) by the driving means. The weight sensing means can easily detect the weight of the article and improve the accuracy of the detection result.

  Moreover, the weight sensor for microwave ovens according to the above-described embodiment of the present invention further has the following additional technical features.

  In some embodiments of the present invention, the drive means includes a drive shaft and a drive motor, the drive shaft is rotatably supported by the support member, and the drive motor is connected to the drive shaft in a transmission manner. The drive shaft is connected to the weight sensing means.

  Furthermore, a first gear and a second gear that are connected to each other in transmission are provided in the support member, and a motor shaft of the drive motor is coaxially connected to the first gear, and the drive The shaft is connected coaxially with the second gear.

  Advantageously, the first gear and the second gear mesh with each other.

  Further, the second gear includes a support shaft having a lower end rotatably supported by the support member and an upper end connected to the drive shaft. Accordingly, when the second gear rotates, the drive shaft can be driven to rotate.

  Advantageously, the weight sensing means is provided below the support member, and the lower end of the support shaft penetrates the support member and is connected to the weight sensing means. The support shaft transmits gravity to the weight sensing means, whereby the article can be weighed.

  Further, a through hole corresponding to a part of the push piece is formed in the circuit board, and the support shaft is provided so as to pass through the through hole and press the push piece.

  Advantageously, the support member comprises an upper support member and a lower support member, the upper support member covers the upper support member, and the first gear and the second gear are the upper support member. And the lower support member are rotatably provided.

  The microwave oven according to the fourth aspect of the present invention is a microwave oven body in which a heating chamber is formed and a first shaft hole is provided in a bottom portion, and a turntable is provided in the bottom portion of the heating chamber. A microwave main body, and a microwave oven main body, and an upper end of the microwave oven main body passes through the first shaft hole and enters the heating chamber so as to be connected to the turntable to rotate the turntable. A microwave sensor having a drive shaft that drives the microwave, and a microwave leakage prevention spring that is attached to the drive shaft, has an upper end connected to the microwave oven body, and a lower end connected to the weight sensor. Prepare. The weight sensor is a weight sensor according to an embodiment of the third aspect of the present invention.

  According to the microwave oven of the embodiment of the present invention, the microwave leakage prevention spring is provided on the drive shaft, the upper end of the microwave leakage prevention spring is connected to the microwave oven body, and the lower end of the microwave leakage prevention spring is connected to the microwave oven. By connecting the weight sensor, a cylindrical microwave choke system can be formed, thereby preventing leakage of the microwave and improving the safety of the microwave oven.

  According to some embodiments of the present invention, the circumferential edge of the first shaft hole is provided with a first flange extending downward, and the upper end of the microwave leakage prevention spring is The first flange is provided on the first flange.

  According to some embodiments of the invention, the weight sensor is provided with a second flange that extends upward and is arranged around a second drive shaft, the microwave A lower end of the leakage preventing spring is provided on the second flange.

1 is a schematic diagram of a microwave oven according to an embodiment of the present invention. 1 is a component assembly diagram of a microwave oven according to an embodiment of the present invention. 1 is a cross-sectional view of a microwave oven according to an embodiment of the present invention. It is an enlarged view of the A section in FIG. FIG. 3 is a component assembly diagram of a weight sensor of a microwave oven according to an embodiment of the present invention. 1 is a cross-sectional view of a weight sensor of a microwave oven according to an embodiment of the present invention. It is sectional drawing of the sensing means of the microwave oven by embodiment of this invention. It is a structure schematic diagram of the sensing elastic piece of the microwave oven by the embodiment of the present invention. It is a front view of the sensing elastic piece of the microwave oven by the embodiment of the present invention. It is a side view of the sensing elastic piece of the microwave oven by the embodiment of the present invention. It is a schematic diagram of the control method of the microwave oven by embodiment of this invention. FIG. 5 is a schematic diagram showing the relationship between the weight of food and the heating time when the food is heated using the microwave oven according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings, where consistently identical or similar symbols represent similar or similar parts or parts having similar or similar functions. In the following, the embodiments described with reference to the drawings are illustrative and are used only for interpreting the present invention and should not be understood as limiting the present invention.

  In the description of the present invention, the terms “center”, “vertical direction”, “lateral direction”, “length”, “thickness”, “upper”, “lower”, “front”, “rear”, “rear”, “Left”, “Right”, “Vertical”, “Horizontal”, “Top”, “Bottom”, “Inside”, “Outside”, “Clockwise”, “Counterclockwise”, “Axial”, “Diameter” ”,“ Circumferential direction ”, and the like are based on the azimuth or positional relationship shown in the drawings and are used for convenient or simple explanation of the present invention. Should not be construed as a limitation on the present invention since it is in a particular orientation, constructed in a particular orientation, and does not indicate or imply when operated.

  Note that the terms “first” and “second” are used for explanation only, and indicate or imply relative importance, or implicitly indicate the number of technical features indicated. Don't understand if you make it explicit. Thus, features that are limited to “first” and “second” explicitly or imply that one or more features are included. In the description of the present invention, unless there is a clear and specific limitation, the term “plurality” means two or two or more such as two or three.

  In the description of the present invention, the terms “attachment”, “connection to each other”, “connection”, “fixation” and the like should be widely understood unless there is a clear definition and limitation. For example, a fixed connection, a detachable connection, or an integral connection is possible. Mechanical connection, electrical connection, direct connection to each other, connection to each other indirectly through an intermediate medium, communication between two components, and mutual connection between two components An action relationship is also possible. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood depending on the specific situation.

  With reference to FIGS. 1-6, the microwave oven 100 which concerns on embodiment of this invention is demonstrated in detail.

  1 to 6, a microwave oven 100 according to an embodiment of the present invention includes a microwave oven body 1, a weight sensor 2, and a microwave leakage prevention spring 3.

  Specifically, a heating chamber 101 is formed in the microwave main body 1, and a turntable 11 is provided at the bottom of the heating chamber 101, and the turntable 11 places food that needs to be heated. It is used to A first shaft hole 102 is provided at the bottom of the microwave main body 1.

  The weight sensor 2 is provided under the microwave oven body 1 (shown in FIG. 3). Further, the weight sensor 2 includes a drive shaft 221, and the upper end of the drive shaft 221 passes through the first shaft hole 102 and enters the heating chamber 101 and is connected to the turntable 11 and is driven to rotate the turntable 11. Thus, the article placed on the turntable 11 can be uniformly heated by the rotation of the turntable 11.

  The microwave leakage prevention spring 3 is provided on the drive shaft 221, and has an upper end connected to the microwave oven body 1 and a lower end connected to the weight sensor 2. As a result, a cylindrical microwave choke is formed outside the drive shaft 221 so that microwaves can be prevented from leaking from this, and the safety of the microwave oven 100 can be improved.

  In the process of operating the microwave oven 100, slight vibration is generated in the microwave oven 100 itself, and therefore, between some components of the microwave oven 100 (for example, components directly or indirectly connected to the drive shaft 221). There is a possibility that an alignment gap is generated, or when the microwave oven 100 is used for a long time, some parts are deformed to generate an alignment gap. However, since the microwave leakage preventing spring 3 itself has elasticity, the microwave leakage preventing spring 3 compensates for the mating gap generated by the deformation of the above-described parts by elastic deformation of itself, and from this, the Wave leakage can be prevented. Furthermore, generally, since the spring is made of metal and the metal has a shielding effect against electromagnetic waves, the microwave leakage prevention spring 3 can shield the microwave in the heating chamber 101, thereby Leakage can be effectively prevented.

  Preferably, the microwave leakage prevention spring 3 having a small spring pitch can be selected, that is, the microwave leakage prevention spring 3 is tight, and the microwave leakage prevention spring 3 has a better microwave leakage prevention effect.

  According to the microwave oven 100 of the embodiment of the present invention, the microwave leakage prevention spring 3 is provided on the drive shaft 221, the upper end of the microwave leakage prevention spring 3 and the microwave oven body 1 are connected, and microwave leakage occurs. By connecting the lower end of the prevention spring 3 and the weight sensor 2, a cylindrical microwave choke system can be formed, microwave leakage can be prevented, and the safety of the microwave oven 100 can be improved. it can.

  Referring to FIGS. 4, 5, and 6, in some embodiments of the present invention, the circumferential edge of the first shaft hole 102 is provided with a first flange 103 extending downward. The upper end of the microwave leakage preventing spring 3 is provided on the first flange 103. As a result, the microwave leakage prevention spring 3 causes the flange of the first shaft hole 102 to enter the inside thereof by tightly fitting the microwave leakage prevention spring 3 and the first flange 103 provided in the first shaft hole 102. It can be wrapped and microwaves can be prevented from leaking from here.

  Naturally, without providing the first flange 103, the upper end of the microwave leakage prevention spring 3 is directly held against the microwave main body 1, or a locking groove is provided at the bottom of the microwave main body 1, For example, the upper end of the wave leakage preventing spring 3 can be accommodated in the locking groove.

  4 and 5, in some examples of the present invention, the weight sensor 2 is provided with a second flange 105 that extends upward and is disposed around the drive shaft 221. The lower end of the microwave leakage prevention spring 3 is provided on the second flange 105. Thereby, the microwave can be prevented from leaking from the outside by the close fitting of the microwave leakage preventing spring 3 and the second flange 105 disposed in the weight sensor 2.

  Similarly, without providing the second flange 105, the lower end of the microwave leakage prevention spring 3 is directly abutted against the weight sensor 2, or a groove is provided at the bottom of the weight sensor 2 to thereby prevent the microwave leakage prevention spring. For example, the lower end of 3 can be accommodated in the groove.

  Further, the weight sensor 2 of the present invention is further provided with sensing means 23 for detecting the weight, that is, the weight of the article placed in the microwave oven 100 is detected by the sensing means 23. Can do. The weight sensor 2 can automatically weigh the heated article. The microwave oven 100 can automatically determine an appropriate heating time for the article based on the weight value of the article weighed by the weight sensor 2. This not only fully heats the article, but also saves energy consumption.

  Below, with reference to FIGS. 1-6, the weight sensor 2 which concerns on some embodiment of this invention is demonstrated in detail. Of course, the weight sensor 2 can also be used in other devices.

  1 to 6, the weight sensor 2 according to the embodiment of the present invention includes a support member 21, a drive unit 22, and a sensing unit 23. Among them, the driving means 22 is used for driving the turntable 11 to rotate. The sensing means 23 can detect the weight of the article placed on the turntable 11, and the support member 21 is used to support the drive means 22 and the sensing means 23.

  Specifically, the driving means 22 and the sensing means 23 are both provided on the support member 21. The sensing means 23 and the drive means 22 are connected. That is, the driving unit 22 transmits the offset due to the gravity of the article placed on the turntable 11 to the sensing unit 23 so that the sensing unit 23 can easily detect the weight of the article.

  According to the weight sensor 2 for the microwave oven 100 of the embodiment of the present invention, by combining the driving means 22 and the sensing means 23, the driving means 22 can quickly drive the rotation of components such as the turntable 11, The sensing means 23 detects the weight of the article, and the driving means 22 detects the sensing means 23 by transmitting displacement (that is, minute displacement generated when an article having a different weight is placed on the turntable 11). The accuracy of the result can be improved, and the sensing means 23 can easily detect the weight of the article, and the accuracy of the detection result can be improved.

  The weight sensor further includes a sensing means holder 24 for supporting the sensing means 23.

  Furthermore, as shown in FIG. 6, the drive means 22 includes a drive motor 222, the drive shaft 221 is rotatably provided on the support member 21, and the drive motor 222 is connected to the drive shaft 221 by transmission. That is, the drive motor 222 can be directly or indirectly driven to rotate the drive shaft 221 by transmission connection.

  Among them, the drive shaft 221 can be an integral structure with the turntable 11 (for example, the drive shaft 221 is not included, the single weight sensor 2 can be provided, and when the microwave oven 100 is assembled, The drive shaft 221 is attached to the weight sensor 2).

  6 and 5, the drive motor 222 is connected to the drive shaft 221. The drive shaft 221 is connected coaxially to the second gear 224, and the first gear 223 and the second gear are connected. 224 is provided in the support member 21, and the first gear 223 and the second gear 224 are transmission-coupled. Thus, after the drive motor 222 is driven directly to rotate the first gear 223, the rotating first gear 223 is connected to the second gear by the transmission connection between the first gear 223 and the second gear 224. The drive shaft 221 can be rotated according to the rotation of the second gear 224 while driving the 224 directly or indirectly to rotate.

  Preferably, the first gear 223 and the second gear 224 are meshed with each other. As a result, the transmission connection between the first gear 223 and the second gear 224 can be simplified, and the first gear 223 is directly engaged with the second gear 224 to drive the second gear 224 to rotate. be able to.

  Further, the first gear 223 and the second gear 224 can be configured to be reduction gear means. Another gear can be provided between the first gear 223 and the second gear 224 for transmission. When another gear is provided between the first gear 223 and the second gear 224, it can be provided in the form of a multistage reduction.

  4 and 5, the support member 21 is provided with a second shaft hole 104 for abutting the second gear 224 and the drive shaft 221. For example, the drive shaft 221 passes through the second shaft hole 104 and abuts coaxially with the second gear 224.

  A second flange 105 extending upward is provided at the circumferential edge of the second shaft hole 104, and the lower end of the microwave leakage prevention spring 3 is provided on the second flange 105. As a result, the microwave leakage prevention spring 3 wraps the flange of the second shaft hole 104 therein by a close fit between the microwave leakage prevention spring 3 and the second flange 105 provided in the second shaft hole 104. From which microwave leakage can be further prevented.

  As shown in FIG. 6, in some embodiments of the present invention, the second gear 224 includes a support shaft 225. The lower end of the support shaft 225 is rotatably supported by the support member 21, and the upper end is connected to the drive shaft 221. Thus, when the second gear 224 rotates, the drive shaft 221 can be driven to rotate.

  Further, the support member 21 can be provided with the second shaft hole 104 described above, and the second gear 224 can be connected to the drive shaft 221 via the support shaft 225.

  6 and 5, the sensing means 23 is provided below the support member 21, and the lower end of the support shaft 225 penetrates the support member 21 and is connected to the sensing means 23. Thus, the articles placed on the turntable 11 can be weighed by transmitting gravity to the sensing means 23 via the drive shaft 221 and the support shaft 225 in order.

  Below, the microwave oven 100 of one Embodiment of this invention is demonstrated in detail using FIG. 1-6 as an example. The following description is exemplary and should not be construed as limiting the invention.

  In this embodiment, as shown in FIGS. 1 to 6, the microwave oven 100 includes a microwave oven body 1, a weight sensor 2, a microwave leakage prevention spring 3, and a bottom plate 4. Among them, the weight sensor 2 includes a drive shaft 221, a support member 21, a drive unit 22, a sensing unit 23, and a sensing unit holder 24. The support member 21 further includes an upper support member 211 and a lower support member 212, and the upper support member 211 covers the lower support member 212.

  Specifically, a heating chamber 101 is formed in the microwave main body 1, and a turntable 11 is provided at the bottom of the heating chamber 101. A first shaft hole 102 is provided at the bottom of the microwave main body 1, and an upper end of the drive shaft 221 passes through the first shaft hole 102 and enters the heating chamber 101 and is connected to the turntable 11. The microwave leakage prevention spring 3 is provided on the drive shaft 221, and has an upper end connected to the bottom of the microwave oven main body 1 and a lower end connected to the weight sensor 2.

  The entire drive means 22 and sensing means 23 are provided on the support member 21, and the drive means 22 and the sensing means 23 are connected by transmission. The drive means 22 includes a drive motor 222, and the motor shaft 2221 of the drive motor 222 passes through the lower support member 212 and is connected to the first gear 223 so as to rotate the first gear 223. To do. The upper support member 211 is provided with a second shaft hole 104, and the lower end of the drive shaft 221 passes through the second shaft hole 104 and is coaxially connected to the second gear 224. A first gear 223 and a second gear 224 are rotatably provided between the upper support member 211 and the lower support member 212, so that the weight sensing means 23 can be easily manufactured and assembled. The first gear 223 and the second gear 224 are meshed with each other, whereby the drive motor 222 is driven to rotate the first gear 223 to drive the second gear 224 to be driven. The shaft 221 is indirectly driven to rotate, and the turntable 11 can be rotated to make the heat received by the article placed on the turntable 11 uniform.

  Further, a first flange 103 extending downward is provided at the circumferential edge of the first shaft hole 102 provided in the microwave oven 1, and the upper end of the microwave leakage prevention spring 3 is the first. It is provided on the flange 103. A second flange 105 extending upward is provided at the circumferential edge of the second shaft hole 104 provided in the upper support member 211, and the lower end of the microwave leakage prevention spring 3 is the second flange. 105. As a result, a microwave microwave choke system is formed between the microwave main body 1 and the weight sensor by being respectively provided on the first flange 103 and the second flange 105 by both ends of the microwave leakage prevention spring 3. Thus, leakage of microwaves can be effectively prevented, and the safety of the microwave oven 100 can be further improved.

  The sensing means 23 can be provided below the lower support member 212, and the second gear 224 includes a support shaft 225. The support shaft 225 has an upper end connected to the drive shaft 221 and a lower end connected to the sensing means 23 through the lower support member 212. As a result, gravity can be transmitted to the sensing means 23 via the drive shaft 221 and the support shaft 225, the article can be weighed, and an appropriate heating time of the article can be automatically determined.

  Below, with reference to FIGS. 6-7, the sensing means 23 of the weight sensor 2 which concerns on embodiment of this invention is demonstrated in detail. The sensing means 23 may be used alone or applied to the above-described weight sensor 2 of the present invention.

  6-7, the sensing means 23 of the weight sensor 2 according to the embodiment of the present invention includes a circuit board 231, a stator (not shown), and a sensing elastic piece 234, of which the stator is The circuit board 231 is electrically connected, and the sensing elastic piece 234 is also electrically connected to the circuit board 231. The sensing elastic piece 234 includes a pushing piece 2342, and the pushing piece 2342 of the sensing elastic piece 234 faces the stator and is arranged with a space therebetween to form a capacitor. Thereby, the capacitor structure according to the deformation of the sensing elastic piece 234 can be changed.

  According to the sensing means 23 of the embodiment of the present invention, the sensing elastic piece 234 is pressed by the gravity of the article itself, the sensing elastic piece 234 is distorted, the capacitance is changed, and the capacitance The weight of the food can be estimated by the change.

  Specifically, the above-described stator is formed on the circuit board 231, and the sensing elastic piece 234 is connected to the circuit board 231. As a result, the structure of the sensing means 23 can be simplified and the weight can be easily detected by the sensing means 23.

  The sensing elastic piece 234 of the weight sensor 2 includes an attachment piece 2341, a push piece 2342, and an elastic connection piece 2343. Among them, the push piece 2342 and the attachment piece 2341 are arranged with a space therebetween, and the elastic connecting piece 2343 is connected to the attachment piece 2341 and the push piece 2342, respectively. A mounting piece 2341 of the sensing elastic piece 234 is connected to the circuit board 231. For example, as shown in FIG. 5, the circuit board 231 is provided with a plurality of attachment holes 232, and the attachment pieces 2341 can be connected to the circuit board 231 through the attachment holes 232.

  The sensing means 23 of the present invention may bias the sensing elastic piece 234 from the side away from the circuit board 231 of the sensing elastic piece 234 to cause the sensing elastic piece 234 to be deformed. The sensing elastic piece 234 may be deformed by urging the sensing elastic piece 234 from the side facing the substrate 231.

  For example, referring to FIGS. 6 to 7, in some embodiments of the present invention, the circuit board 231 is formed with a through-hole 233 facing a part of the pushing piece 2342, and the corresponding element is formed. It is used to drive the pushing piece 2342 through the through-hole 233, whereby the capacitance of the sensing means 23 can be changed.

  Specifically, the weight sensor 2 further includes a support member 21 and a driving unit 22. As described above, the lower end of the support shaft 225 of the driving unit 22 penetrates the through hole 233 and presses the pushing piece 2342. When an article is placed on the turntable 11 in the microwave oven 100, the gravity of the article is transmitted to the push piece 2342 via the drive shaft 221 and the support shaft 225 to drive the deformation of the push piece 2342. The capacitance of the capacitor structure is changed by the deformation of the sensing elastic piece 234, thereby detecting the weight of the article.

  Further, the through hole 233 of the circuit board 231 faces the intermediate portion of the push piece 2342, and the push piece 2342 can be provided with a contact 2345 that protrudes toward the through hole 233. As shown in FIG. 7, the through hole 233 of the circuit board 231 is opposed to the contact 2345 of the pushing piece 2342, whereby the drive shaft 221 passes through the through hole 233 and directly contacts the contact 2345, The push piece 2342 generates distortion, and the sensitivity of the sensing means 23 can be improved.

  Further, in some embodiments of the present invention, the pushing piece 2342 is parallel to the attachment piece 2341, and the surface of the pushing piece 2342 facing the stator is relative to the same side surface of the attachment piece 2341. It is recessed. In other words, the plane on which the pushing piece 2342 is located is parallel to the plane on which the attachment piece 2341 is located, and the distance between the pushing piece 2342 and the stator is larger than the distance between the attachment piece 2341 and the stator. For example, as shown in FIG. 7, the upper surface of the pushing piece 2342 is lower than the upper surface of the mounting piece 2341.

  As described above, when the sensing elastic piece 234 is attached, the sensing elastic piece 234 can be directly attached to the circuit board 231. At this time, the push piece 2342 is provided on the circuit board 231 and the circuit board 231. A capacitor structure is formed at a predetermined distance.

  As a matter of course, an element such as an insulating member can be provided between the sensing elastic piece 234 and the circuit board 231, and the push piece 2342 and the stator can be arranged at an interval.

  Further, the circuit board 231 is connected to a mica sheet 235 located on the surface of the sensing elastic piece 234 on the side away from the circuit board 231. As shown in FIG. 5, the sensing elastic piece 234 is located between the circuit board 231 and the mica sheet 235. The purpose of providing the mica sheet 235 is to dispose the sensing means 23 and other elements that support the sensing means 23 at an interval so as not to detect the weight due to the influence on the change in capacitance of the other elements. It is to avoid being accurate and to improve the accuracy of the detection result.

  Preferably, in some embodiments of the present invention, a sensing means holder 24 is provided under the sensing means 23, and the sensing means holder 24 is connected to the support member 21 described above, thereby The sensing means 23 can be fixed to the bottom of the support member 21.

  In short, the sensing means 23 of the present invention includes a circuit board 231, a stator, and a sensing elastic piece 234, of which the stator is electrically connected to the circuit board 231, and the attachment piece 2341 of the sensing elastic piece 234. Are electrically connected to the circuit board 231, and the pushing piece 2342 of the sensing elastic piece 234 faces the stator and is disposed at a distance to form a capacitor. Thereby, the capacitance is changed according to the deformation of the sensing elastic piece 234. A through hole 233 is formed in the middle of the circuit board 231, and a contact 2345 protruding toward the through hole 233 is provided in the center of the push piece 2342, and the through hole 233 is connected to the contact 2345. Opposite. A mica sheet 235 is provided below the sensing elastic piece 234.

  According to the sensing means 23 of the embodiment of the present invention, the sensing elastic piece 234 is pressed by the gravity of the article itself, the sensing elastic piece 234 is distorted, the capacitance is changed, and the capacitance The weight of the food can be estimated by the change.

  The microwave oven 100 further includes a bottom plate 4, and a weight sensor is provided on the bottom plate 4. The bottom plate 4 is provided with a support portion (not shown), and the weight sensor is fixed to the bottom plate 4 through the support portion, whereby deformation of the bottom plate 4 can be prevented.

  Below, with reference to FIGS. 8-10, the sensing elastic piece 234 of the weight sensor 2 which concerns on embodiment of this invention is demonstrated in detail.

  As shown in FIG. 8, the sensing elastic piece 234 of the weight sensor 2 according to the embodiment of the present invention includes an attachment piece 2341, a push piece 2342, and an elastic connection piece 2343. Among them, the push piece 2342 and the attachment piece 2341 are arranged with a space therebetween, and the elastic connecting piece 2343 is connected to the attachment piece 2341 and the push piece 2342, respectively.

  In the sensing elastic piece 234 of the weight sensor 2 according to the present invention, the elastic connecting piece 2343 and the push piece 2342 are connected to each other, and the sensing elastic piece 234 is pressed against the sensing elastic piece 234 by the gravity of the article itself. The distortion of 234 can be generated, the capacitance can be changed, and the weight of the food can be estimated from the change in capacitance.

  According to an embodiment of the present invention, a plurality of attachment pieces 2341 are arranged around the push piece 2342 with a space therebetween, and the elastic connecting pieces 2343 are in one-to-one correspondence with the plurality of attachment pieces 2341. The elastic connecting piece 2343 is connected to both ends of the pushing piece 2342 and the attachment piece 2341 corresponding thereto. Specifically, the number of elastic connecting pieces 2343 and attachment pieces 2341 is the same.

  For example, in the illustrations shown in FIGS. 8 to 9, the number of attachment pieces 2341 is four, and the four attachment pieces 2341 are arranged around the push piece 2342 at regular intervals. Each piece 2341 is connected to the push piece 2342 through one elastic connecting piece 2343. Thus, the push piece 2342 can be securely attached to the attachment piece 2341.

  In addition, a plurality of elastic connecting pieces 2343 can be connected to one mounting piece 2341, and the push piece 2342 can be positioned via the plurality of elastic connecting pieces 2343.

  Specifically, as shown in FIG. 9, the elastic connecting piece 2343 has one end connected to one of two adjacent mounting pieces 2341 and the other end of the two elastic connecting pieces 2341. It is connected with the part which opposes between. The length of the elastic connecting piece 2343 can be extended within a certain range, the amount of deformation of the push piece 2342 is increased, the range of change in the capacitance of the capacitor structure described above is increased, and the detection result Accuracy can be improved.

  For example, in the example shown in FIG. 9, one end of the left elastic connecting piece 2343 of the sensing elastic piece 234 (the front end of the elastic connecting piece 2343 in FIG. 9) is connected to the left front mounting piece 2341, The other end of the connecting piece 2343 (the right end of the elastic connecting piece 2343 in FIG. 9) is connected to an opposing portion between the two attachment pieces 2341 located at the left front and left rear of the push piece 2342. Thereby, the receiving force of the pushing piece 2342 becomes more uniform, and the stability of the sensing elastic piece 234 can be improved.

  Furthermore, referring to FIG. 9, the elastic connecting piece 2343 includes a first branch part 201 and a second branch part 202, and the first branch part 201 is connected to a corresponding attachment piece 2341 at one end, The other end extends toward another attachment piece 2341 adjacent to the attachment piece 2341, and the second branch 202 has one end connected to the free end of the first branch 201 and the other end Extends around the pushing piece 2342 in the radial direction and is connected to the pushing piece 2342.

  For example, in the example shown in FIG. 9, one end of the first branch 201 of the left elastic coupling piece 2343 of the sensing elastic piece 234 (the front end of the first branch 201 described above in FIG. 9) is the left front attachment piece 2341. The other end (the rear end of the first branch part 201 in FIG. 9) of the first branch part 201 of the elastic connection piece 2343 extends toward the left rear attachment piece 2341. , One end of the second branch 202 of the elastic connecting piece 2343 (the left end of the second branch 202 in FIG. 9) is the free end of the first branch 201 (the first branch in FIG. 9). 9 and the other end (the right end of the above-described second branch 202 in FIG. 9) extends around the pushing piece 2342 in the radial direction to extend the pushing portion. The moving piece 2342 is connected. Optionally, the elastic connecting piece 2343 is L-shaped, but is not limited thereto.

  Optionally, the plurality of elastic connecting pieces 2343 are arranged uniformly spaced around the push piece 2342 and arranged so as to be symmetric with respect to the push piece 2342 (FIG. 8). To 9). Thereby, the receiving force of the push piece 2342 becomes more uniform, and the reliability and sensitivity of the sensing elastic piece 2342 can be improved.

  Further, as shown in FIGS. 8 to 9, a reinforcing flange 2344 is connected between two adjacent mounting pieces 2341, and the reinforcing flange 2344 faces away from the plane where the mounting piece 2341 is located. It is extended. Thereby, the structural strength of the sensing elastic piece 234 can be improved.

  Further, the mica sheet 235 can be provided under the sensing elastic piece 234, and the mica sheet 235 can support the pushing piece 2342 to improve the structural strength of the pushing piece 2342. Accordingly, the reinforcing flange 2344 can provide a positioning action for the mica sheet 235.

  According to one embodiment of the present invention, the pushing piece 2342 is parallel to the mounting piece 2341, and one side surface of the pushing piece 2342 is provided to be recessed with respect to the same side surface of the mounting piece 2341. Yes. For example, in the example shown in FIG. 10, the plane where the pushing piece 2342 is located and the plane where the attaching piece 2341 is located are parallel to each other, and the upper surface of the pushing piece 2342 is located below the upper surface of the attaching piece 2341. ing.

  Further, the push piece 2342 is formed with a contact 2345 protruding from the surface of the push piece 2342, and the contact 2345 is formed at the center of the push piece 2342 as shown in FIG. Thereby, the contact between the article and the pushing piece 2342 becomes more sufficient, the sensitivity of the sensing elastic piece 234 can be improved, and the detection result can be more accurate.

  Optionally, the sensing elastic piece 234 is integrally molded, and the manufacturing process is easy and can be easily realized.

  According to one specific embodiment of the present invention, the sensing elastic piece 234 of the weight sensor 2 is integrally molded, and includes four attachment pieces 2341, one push piece 2342, and four elastic connections. A piece 2343. Among them, four attachment pieces 2341 are uniformly arranged around the push piece 2342, and a contact 2345 protruding from the surface of the push piece 2342 is formed at the center of the push piece 2342. . The plane on which the push piece 2342 is located and the plane on which the attachment piece 2341 is located are parallel to each other, and the plane on which the push piece 2342 is located is located below the plane on which the attachment piece 2341 is located.

  The elastic connection piece 2343 is L-shaped and includes a first branch part 201 and a second branch part 202. The first branch part 201 is connected to a corresponding attachment piece 2341 at one end and the other end at the other end. The second branch 202 extends toward another mounting piece 2341 adjacent to the mounting piece 2341, and one end of the second branch 202 is connected to the free end of the first branch 201, and the other end of the second branch 202. The moving piece 2342 extends along the radial direction and is connected to the pushing piece 2342. The four elastic connecting pieces 2343 are arranged around the pushing piece 2342 at regular intervals, and are arranged so as to be symmetrical with respect to the pushing piece 2342. A reinforcing flange 2344 is connected between two adjacent mounting pieces 2341, and the reinforcing flange 2344 extends in a direction away from a plane on which the mounting pieces 2341 are located.

  The sensing elastic piece 234 of the weight sensor 2 according to the embodiment of the present invention connects the elastic connecting piece 2343 and the pushing piece 2342, thereby pressing the sensing elastic piece 234 by the gravity of the article itself, The sensing elastic piece 234 is distorted to change the capacitance, and the weight of the food can be estimated from the change in the capacitance.

  Below, with reference to FIGS. 11-12, the control method of the microwave oven which concerns on embodiment of this invention is demonstrated. The control method can also be used for other microwave ovens.

  A microwave oven control method according to an embodiment of the present invention includes the following steps. The heating time T is determined stepwise based on the weight W of the article to be cooked (for example, food), and if the weight W of the article to be cooked is equal to or less than the first predetermined weight W1, When the weight W of the article to be cooked for the first predetermined time T1 is equal to or greater than the second predetermined weight W2, the weight of the article to be cooked is heated for the second predetermined time T2 When W is between the first predetermined weight W1 and the second predetermined weight W2, the heating time is determined based on the weight W of the article to be cooked.

  In other words, when W ≦ W1, the heating time is T1. When W = 0 g, that is, when there is no article in the microwave oven, the heating time is 0 s. Thereby, when the mass of the article to be cooked is too light, the situation in which the article to be cooked is not heated due to the heating time being too short can be prevented.

  When W1 <W <W2, the heating time is proportional to W. In that case, the heating time increases as W increases. This allows the heating time to be flexibly adjusted based on the weight of the article being cooked, effectively avoiding situations where the food is not heated or overheated, simplifying the operation steps, Energy can be saved.

  When W ≧ W2, the heating time is T2. This effectively avoids a situation where the article to be cooked is heated and becomes too hot.

  According to the microwave oven control method of the embodiment of the present invention, the heating time is determined stepwise based on the weight of the article to be cooked. This can reasonably control the heating time and ensure that the temperature of the article being cooked is suitable.

  According to one embodiment of the present invention, when the first predetermined weight W1 is in the range of 50 g to 150 g, the first predetermined time T1 can be set to be in the range of 30 s to 60 s. .

  According to one embodiment of the present invention, when the second predetermined weight W2 is 2000 g or more, the second predetermined time T2 can be set to be within a range of 10 minutes to 20 minutes.

  According to an embodiment of the present invention, when the weight W is between the first predetermined weight W1 and the second predetermined weight W2, the second predetermined weight is greater than the first predetermined weight W1. A third predetermined time T3 during which an article having a third predetermined weight W3 smaller than W2 needs to be heated is determined, i.e., T1 <T3 <T2. In this case, the heating time T is determined based on the third predetermined weight W3 and the third predetermined time T3, and the heating time can be calculated as T = W / W3 × T3.

  For example, the first predetermined weight W1 is 100 g, the second predetermined weight W2 is 2500 g, the third predetermined weight W3 is 750 g, and the third predetermined weight W3 is heated until the third predetermined time T3 is in a predetermined state. It can be set to be the required third predetermined time T3. In other words, when the weight of the article to be cooked is 750 g, the heating time is set to T3. In this case, when the range of the weight W of the article to be cooked is 100 g <W <2500 g, the heating time T of the cooked article having the weight W is calculated as T = W / 750 × T3. Can do.

  According to an embodiment of the present invention, the microwave oven includes a weight sensor, and detects the weight of an article to be cooked by the weight sensor. In this case, when the article to be cooked is placed in the microwave oven, the weight sensor automatically detects the weight of the article to be cooked, and then automatically sets the heating time based on the detected weight of the cooked article. Can be set. This makes the heating of the microwave oven more intelligent, further simplifies the operation steps, simplifies the structure, and can be easily realized.

  Furthermore, the above-described control method further includes the following steps. The idling weight W0 detected when the microwave oven is idling is recorded, the actual weight W (measurement) of the cooked article is measured, and the weight of the cooked article is calculated by W = W (measurement) −W0. be able to.

  Thereby, the weight of the article to be cooked can be calibrated and measurement inaccuracies due to being used for a long time of the microwave oven can be avoided.

  Specifically, an idling detection controller for detecting the idling weight W0 can be provided in the microwave oven, and a nulling button for controlling the operation of the idling detection controller can be provided. Under the condition of calibration, when the idling detection controller records the weight W0 at the time of idling of the microwave oven, presses the zero return button, performs alignment, and then starts the microwave oven normally, the actual state of the article to be cooked The weight of can be calculated by W = W (measurement) −W0.

  This makes the heating time of the microwave oven more accurate.

  According to one specific embodiment of the present invention, a method for controlling a microwave oven includes the following steps. The heating time T is determined stepwise based on the weight W of the article to be cooked, and a weight sensor, an idling detection controller, and a zero return button are provided in the microwave oven.

  Under the condition of calibration, when the idling detection controller records the weight W0 at the time of idling of the microwave oven, presses the zero return button, performs alignment, and then starts the microwave oven normally, the actual state of the article to be cooked The weight of can be calculated by W = W (measurement) −W0.

  When 0 <W ≦ 100 g, the heating time is set to 30 s.

  When 100 g <W <2500 g, the heating time of the item to be cooked with a weight of W is determined based on the heating time T3 of 750 g set inside the system. Specifically, when W = 0 g, the heating time is set to 0 s, and when W = 750 g, the heating time is set to T3, and the weight of the article to be cooked is W. Is detected, the heating time can be calculated by T = W / 750 × T3.

  When W ≧ 2500 g, the heating time is set to 15 minutes.

  According to the microwave oven control method of the embodiment of the present invention, the heating time is determined stepwise based on the weight of the article to be cooked. This makes it possible to reasonably control the heating time, ensure that the temperature of the article to be cooked is suitable, is easy to operate, convenient to use, and saves energy. .

  In this specification, a description referring to a term such as “one embodiment”, “some embodiments”, “exemplary”, “specific examples”, or “some examples” refers to the embodiment or Specific features, configurations, materials, or characteristics described in connection with the examples are included in at least one embodiment or example of the present invention. In the present specification, exemplary statements for the above terms do not necessarily indicate the same embodiments or examples. In addition, the specific features, configurations, materials, or characteristics described may be appropriately combined in any one or more of the embodiments or examples. Under consistent conditions, those skilled in the art can combine and combine the different embodiments or examples described herein and their features.

  Although the embodiments of the present invention have been shown and described, those skilled in the art will understand that a plurality of changes, corrections, changes and modifications can be made to these embodiments without departing from the principles and spirit of the invention. it can. The scope of the present invention is limited by the claims and their equivalents.

Invention of sign

DESCRIPTION OF SYMBOLS 100 ... Microwave oven, 101 ... Heating chamber, 102 ... First shaft hole, 103 ... First flange, 104 ... Second shaft hole, 105 ... Second flange, 1. ..Main body of microwave oven, 11 ... turn table, 2 ... weight sensor, 21 ... support member, 211 ... upper support member, 212 ... lower support member, 22 ... driving means 221 ... drive shaft, 222 ... drive motor, 2221 ... motor shaft, 223 ... first gear, 224 ... second gear, 225 ... support shaft, 23 ... sensing Means, 231... Circuit board, 232... Mounting hole, 233... Through hole, 234... Sensing elastic piece, 2341 ... Mounting piece, 2342 ... Pushing piece, 2343. Elastic connecting piece, 2344 ... Reinforcing flange, 2 45 ... Contact, 201 ... First branch, 202 ... Second branch, 235 ... Mica sheet, 24 ... Sensing means holder, 3 ... Microwave leakage prevention spring, 4 ... Bottom plate

Claims (15)

An attachment piece, a push piece, and an elastic connecting piece;
The sensing elastic piece of the weight sensor, wherein the push piece and the attachment piece are arranged with a space therebetween, and the elastic connecting piece is connected to the push piece and the attachment piece, respectively.   A plurality of the attachment pieces are arranged around the push piece with a space therebetween, and the elastic connection pieces are a plurality of one-to-one correspondences with the plurality of attachment pieces, and both ends are The sensing elastic piece of the weight sensor according to claim 1, wherein the elastic piece is connected to the attachment piece corresponding to the push piece.   The plurality of the elastic connecting pieces are arranged so as to be evenly spaced around the pushing piece and arranged so as to be centrosymmetric with respect to the pushing piece. The sensing elastic piece of the weight sensor according to 2. A circuit board;
A stator formed on the circuit board and electrically connected to the circuit board;
4. The sensing elastic piece according to claim 1, wherein the sensing elastic piece is electrically connected to the circuit board, the attachment piece of the sensing elastic piece is connected to the circuit board, and the sensing elastic piece is pressed. And a sensing elastic piece having a capacitor structure in which a moving piece is opposed to the stator with a gap and a capacitance is changed in accordance with deformation of the sensing elastic piece. Weight sensing means.   5. The pushing piece is parallel to the mounting piece, and the surface facing the stator is provided so as to be recessed with respect to the same side surface of the mounting piece. Weight sensing means for the weight sensor according to claim 1.   The weight sensing means of a weight sensor according to claim 4, wherein a mica sheet located on a surface of the sensing elastic piece on a side away from the circuit board is connected to the circuit board. A support member;
Drive means provided on the support member;
A weight sensor for a microwave oven comprising: the weight sensing means according to claim 4, wherein the weight sensor is provided on the support member and connected to the driving means. The drive means includes a drive shaft and a drive motor,
The drive shaft is rotatably supported by the support member, the drive motor is connected in transmission with the drive shaft, and the drive shaft is connected with the weight sensing means. The weight sensor for microwave ovens according to 7. In the support member, a first gear and a second gear that are transmission-coupled to each other are provided,
The microwave oven according to claim 8, wherein a motor shaft of the drive motor is coaxially connected to the first gear, and the drive shaft is coaxially connected to the second gear. For weight sensor.   The weight sensor for a microwave oven according to claim 8, wherein the second gear includes a support shaft having a lower end rotatably supported by the support member and an upper end connected to the drive shaft. .   11. The electron according to claim 10, wherein the weight sensing means is provided below the support member, and a lower end of the support shaft passes through the support member and is connected to the weight sensing means. Range weight sensor.   A through hole corresponding to a part of the push piece is formed in the circuit board, and the support shaft is provided so as to pass through the through hole and press the push piece. The weight sensor for a microwave oven according to claim 11. A heating chamber is formed, a microwave oven body provided with a first shaft hole at the bottom, a microwave oven body provided with a turntable at the bottom of the heating chamber,
Provided below the microwave oven body, and provided with a drive shaft whose upper end penetrates the first shaft hole and enters the heating chamber and is connected to the turntable to drive the turntable. And a weight sensor according to any one of claims 7 to 12,
A microwave oven comprising: a microwave leakage prevention spring that is provided on the drive shaft, has an upper end connected to the microwave oven body, and a lower end connected to the weight sensor.   A first flange extending downward is provided at a circumferential edge of the first shaft hole, and an upper end of the microwave leakage prevention spring is provided on the first flange. The microwave oven according to claim 13, wherein the microwave oven is a microwave oven.   The support member is provided with a second shaft hole for abutting the second gear and the drive shaft, and a circumferential edge of the second shaft hole extends upward. The microwave oven according to claim 14, wherein two flanges are provided, and a lower end of the microwave leakage prevention spring is provided on the second flange.

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