JP3602767B2 - Heating device weight detector - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a weight detection device for a cooking device.
[0002]
[Prior art]
In a heating cooker, as an element for detecting the weight of an object to be heated, various elements such as an element whose capacitance changes with pressure and an element whose output voltage changes with pressure are used. Conventionally, these weight detecting devices have been used for a turntable type food placing table, but not used for a square dish type food placing table.
[0003]
As well-known materials, there are square dish type food mounting tables described in JP-A-8-35662, JP-A-6-109254, JP-A-6-221568 and JP-A-62-17528. Are known.
[0004]
[Problems to be solved by the invention]
By the way, in the technology described in each of the above-mentioned conventional publications, the detection structure is complicated, so that the square plate mounting table is fixedly arranged (Japanese Patent Laid-Open No. 8-35662) or the weight of the outside of the side wall of the heating chamber. The detection device is large and requires extra space outside the heating chamber (Japanese Patent Laid-Open No. 6-109254), or is connected by a roberval mechanism, which complicates the structure and has problems in reliability, detection accuracy, etc. (See Japanese Unexamined Patent Publication No. 62-17528).
[0005]
Further, as described in Japanese Patent Application Laid-Open No. 6-221568, the present applicant, as described in Japanese Patent Application Laid-Open No. 6-221568, supports a receiving tool for receiving one end of a skewer on a side wall with a support shaft so as to be swingable. A technique has been proposed in which a pressure sensor is provided at a position where the stopper comes into contact with the side wall. However, the support shaft is located inside the heating chamber, and the weight detection unit (pressure sensor) is disposed on the wall surface of the heating chamber side wall. Therefore, the operation of these members may be hindered by dirt or foreign matter, and there is a problem in reliability, detection accuracy and the like.
[0006]
An object of the present invention is to provide a weight detecting device that has a simple configuration, has high detection accuracy and high reliability, and can save space.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, there is provided a working body rotatable around a fulcrum located outside the side wall of the heating chamber, and a weight detecting unit for detecting a load applied to the working body. From a horizontal arm that projects horizontally to the heating chamber side through a hole in the sidewall of the heating chamber and has a mounting table support at the tip, and a vertical arm that projects vertically from the rotation center and has an action part to the weight detector at the tip. A configuration formed in a substantially L-shape was employed.
[0008]
Thus, the load of the mounting table on which the object to be heated is mounted is transmitted directly from the operation section to the weight detection section via the substantially L-shaped operating body, so that good accuracy can be secured. In addition, since the rotation center of the operating body is outside the side wall of the heating chamber, the operation is not hindered by dirt or foreign matter, and the reliability and detection accuracy are excellent. In addition, since the vertical arm is disposed substantially parallel to the side wall of the heating chamber, space saving can be realized as compared with the related art.
[0009]
In the weight detection device capable of realizing space saving, a plurality of weight detection devices can be set according to the height of the mounting table, even in the case where the height of the mounting table can be selected according to the type of heating. That is, by setting a plurality of stages of operating bodies having mounting table support portions corresponding to the positions of the mounting tables, weight detection can be performed in accordance with the selection of the height of the mounting table.
[0010]
In the above case, not only a form in which a plurality of weight detecting sections are provided corresponding to each operating body but also a configuration in which one weight detecting section detects the weight can be adopted. Specifically, a plurality of operating bodies are provided in a plurality of stages in accordance with the height of the mounting table, and each operating body is horizontally projected through the hole in the side wall of the heating chamber toward the heating chamber side and has a mounting table support at the tip. And a connecting portion for synchronizing the rotation of each operating body, and a vertical arm protruding vertically from the rotation center of any one of the operating bodies and having an operating portion for the weight detecting section at the tip. Can be illustrated.
[0011]
In addition to the above-described configuration, as a configuration for detecting the weight with one weight detection unit, the operating bodies are arranged in a plurality of stages in the height direction of the heating chamber, and each of the operating bodies is horizontally moved through the hole in the side wall of the heating chamber toward the heating chamber. A horizontal arm having a mounting table support portion at the tip and a vertical arm projecting vertically from the rotation center of each operating body and having an action portion to the weight detection portion at the tip. A configuration in which the action section acts on one weight detection section can also be exemplified.
[0012]
In this case, the load transmitted from the action section to the weight detection section changes depending on the height of the mounting table on which the object to be heated has the same weight depending on the arm length of the vertical arm of the operating body of each stage. Will do. In order to solve this, a recognition means for recognizing at which height the mounting table is arranged is provided, and the output value of the weight detector is corrected according to the recognition result. Even if installed at a height, accurate weight detection is possible.
[0013]
Various configurations can be considered as a specific configuration of the recognition unit. For example, the recognition unit includes a light-emitting element and a light-receiving element, one of which is disposed above the upper mounting table, and the other is the upper and lower mounting tables. And the presence / absence of the mounting table is detected by transmitting / blocking light between light receiving and emitting, so that the setting position of the mounting table can be recognized with a small number of components.
[0014]
Also, if the length of the vertical arm having the action portion at the tip is set to be large relative to the horizontal arm length of the mounting table support portion, and the rotation trajectory of the action portion is set as horizontally as possible, the action portion faces each other. The contact is made in a direction orthogonal to the weight detection section, and highly accurate detection is possible.
[0015]
As another means for increasing the detection accuracy, if a configuration is adopted in which the action section and the weight detection section are brought into point contact, the load point is fixed, and a highly reliable output can be obtained. In order for the two to make point contact, a configuration in which a projection is formed on either the action portion or the weight detection portion is preferable.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
FIG. 1 is a front sectional view of a high-frequency heating cooker with an oven function provided with a weight detecting device according to the present invention, FIG. 2 is a right side view thereof, FIG. 3 is a plan sectional view thereof, and FIG. FIG. 5 is a front view, FIG. 5 is a side view thereof, and FIG. 6 is an enlarged front view of a main part of the weight detecting device.
[0017]
As shown in the figure, a high-frequency heating cooker 1 according to the present embodiment includes a heating box 3 having a heating chamber 2 therein and an open front, an outer box 4 covering the periphery of the heating box 3, and one side wall of the heating box 3. A high-frequency heating function component 5 arranged in a side housing portion between the box 4, an electric heater 6 arranged in upper and lower portions of the heating chamber 2, and a turntable arranged in a bottom wall of the heating chamber 2 7, a driving unit 8 that rotationally drives the turntable, and a mounting table 11 that opens the front door 10 of the heating chamber 3 and that is removably provided inside the mounting table 11 and that can mount a food to be heated. A weight detecting device for supporting the mounting table and detecting the weight of the object to be heated on the mounting table;
[0018]
As shown in FIG. 4, the weight detecting device 20 is provided on both right and left sides of the heating box 3, and has a rotation center A outside the side wall 3a of the heating chamber 2 and rotatably supports the rotation center A as a fulcrum. And a weight detecting unit 22 for detecting a load applied to the operating body 21.
[0019]
The operating body 21 is made of synthetic resin, protrudes in the horizontal direction through the hole 23 in the side wall 3 a of the heating chamber toward the heating chamber, and has a horizontal arm 25 having a mounting table support portion 24 at the tip, and a vertical arm 25 from the rotation center A. A vertical arm 27 protruding in the direction and having an operating portion 26 for the weight detecting portion 22 at the tip is formed in a substantially L-shape.
[0020]
The mounting table support portion 24 is formed in the side wall 3a of the heating chamber 2 to be long in the front-rear direction, and has a lateral T-shaped cross section on which the outer peripheral flange 11a of the dish-shaped mounting table 11 can be mounted by a protruding portion 24a protruding inward. And is disposed close to the side wall 3 a of the heating chamber 2.
[0021]
The horizontal arm 25 is a round bar member having a circular cross section extending from the front and rear two places on the rear surface of the mounting table support part 24 to the outside of the heating chamber 2 through the hole 23 of the side wall 3 a of the heating chamber 2, The amount of protrusion outside the heating chamber 2 is set to be small, and the occupation width of the weight detection device 20 outside the heating chamber 2 is set to be small.
[0022]
The vertical arm 27 is a rectangular plate-like member fixed to the rear end of the horizontal arm 25 and formed to be long in the front-rear direction. Both front and rear ends of the vertical arm 27 are bent toward the side wall 3a of the heating chamber 2 to be folded for reinforcement. It functions as the music part 29. In addition, the bent portion 29 comes into contact with the side wall 3 a of the heating chamber 2 when the operating body 21 rotates from the rotation center A, thereby restricting the rotation range of the operating body 21.
[0023]
On the inner side of the upper end of the vertical arm 27, a columnar or hemispherical convex acting portion 26 projecting toward the side wall 3 a of the heating chamber and acting on the weight detecting portion 22 is formed at a central position in the front-rear direction. The action section 26 has a distance from the rotation center A larger than the distance from the mounting table support point (force point) of the mounting table support section 24 to the rotation center A, and the rotation locus of the action section 26 is as horizontal as possible. The action unit 26 comes into contact with the facing weight detection unit 22 in a direction perpendicular to the weight detection unit 22.
[0024]
At the lower end of the bent portion 29 of the vertical arm 27, a shaft portion 31 penetrating in the front-rear direction is provided. The shaft portion 31 is rotatable on both ends rising portions 32a of a holding plate 32 holding the weight detecting portion 22. It is pivotally supported and serves as the rotation center A of the operating body 21.
[0025]
The holding plate 32 is formed by bending a single flat plate into a substantially U-shape in plan view, and further bending both ends outward to form a bent portion 32b. The bent portion 32b is formed by the side wall 3a of the heating chamber 2. Is fixed outside by welding or the like.
[0026]
At the center of the holding plate 32, a through hole 35 is formed at a position corresponding to the action portion 26 of the vertical arm 27, and the weight detection unit 22 is fixed inside the U-shaped holding plate 32 corresponding to the through hole 35. ing. The weight detection unit 22 includes a pressure sensor having a known structure such as a strain gauge or a semiconductor pressure sensor, and converts the pressure into an electric signal to calculate the weight.
[0027]
In the above configuration, as shown in FIG. 6, since the load of the mounting table 11 on which the object to be heated is placed is applied to the mounting table support portion 24, the operating body 21 rotates around the fulcrum A and extends vertically from the fulcrum A. The acting part 26 of the protruding vertical arm 27 transmits the load to the superposition detecting part 22 with the load W2. Since the weight detection unit 22 generates an output according to the load W2, a control unit (not shown) performs an arithmetic process according to the output, calculates the weight of the object to be heated, and controls heating.
[0028]
[Second embodiment]
FIG. 7 is an enlarged front view of a main part of the weight detecting device according to the second embodiment. In the present embodiment, in the first embodiment, the weight detection unit 22 is disposed above the mounting table support unit 24, whereas the weight detection unit 22 is disposed below the mounting table support unit 24. This is an effective mode when the position of the mounting table 11 is above the heating chamber 2 and the weight detection unit 22 cannot be arranged above the mounting table support unit 24.
[0029]
In the present embodiment, the weight detection unit 22 is disposed outside the U-shaped holding plate 32, the vertical arm 27 of the operating body 21 is disposed inside the holding plate 32, and the action unit 26 is disposed outside the vertical arm 27. It is in the form of being arranged.
[0030]
Since other configurations and operations are the same as those of the first embodiment, the same reference numerals are given to the respective constituent members, and description thereof will be omitted.
[0031]
[Third Embodiment]
FIG. 8 is a front sectional view of a cooking device showing a third embodiment. In the present embodiment, the weight detecting device 20 is installed in two levels in the height direction on both side walls of the heating chamber 2, and the mounting table 11 can be placed in two types in the height direction. Heating according to the object becomes possible. Since other configurations and operations are the same as those of the first embodiment, the same reference numerals are given to the respective constituent members, and description thereof will be omitted.
[0032]
[Fourth embodiment]
9 is a front sectional view of a high-frequency heating cooker according to a fourth embodiment, FIG. 10 is a right side view thereof, and FIG. 11 is an enlarged view of a main part of the weight detection device. As shown in the figure, in the present embodiment, even when a plurality of weight detection devices 20 are arranged in the height direction, one weight detection unit 22 can detect the weight.
[0033]
That is, in the weight detection device 20 of the present embodiment, the two operating bodies 21a and 21b are installed in two stages in the height direction on both side walls of the heating chamber 2, and the upper operating body 21a is the first operating body 21a. In the same manner as in the first embodiment, a horizontal arm 25a protruding in the horizontal direction through the hole 23a of the heating chamber side wall 3a, a horizontal arm 25a having a mounting table support portion 24a at the end, a vertical arm protruding from the rotation center Aa, and a weight A vertical arm 27 having an action portion 26 for the detection portion 22 is formed in a substantially L-shape. A connection holding portion 41 is integrally formed on the opposite side of the mounting table support portion 24a with respect to the rotation center Aa of the operating body 21a.
[0034]
The lower operating body 21b has a center of rotation Ab outside the side wall 3a of the heating chamber 2, projects horizontally toward the heating chamber through a hole 23b in the side wall 3a of the heating chamber, and has a mounting table support portion 24b at the tip. An arm 25b is provided, and a connection holding section 42 is integrally formed on the opposite side of the mounting table support section 24b with respect to the rotation center Ab.
[0035]
In order to synchronize the turning operations of these operating bodies 21, the connection holding portions 41 and 42 are rotatably connected by plate-shaped connection portions 40 via connection shafts Ba and Bb. The loads W1 and W2 from the upper and lower mounting table support portions 24a and 24b are applied to the action portion 26 of the vertical arm 27 projecting vertically from the rotation center Aa of the operating body 21a.
[0036]
The holding plate 32 that holds the weight detection unit 22 is formed to be long in the up-down direction, and rotatably supports the upper and lower operating bodies 21a, 21b around the rotation centers Aa, Ab.
[0037]
In the above configuration, since the positions of the fulcrums Aa and Ab of the operating bodies 21a and 21b are fixed, a load is applied to the mounting table support portions 24a and 24b, and when the operating bodies 21a and 21b rotate, Aa , Ab, Ba, and Bb always operate while maintaining a parallelogram. Therefore, the loads W1, W2 applied to the upper and lower mounting table support portions 24a, 24b are equally transmitted to the action portion 26 of the vertical arm 27 of the upper working body 21a. Therefore, even if there are a plurality of mounting table support portions 24a, 24b, the weight can be detected by one weight detection unit 22. Other configurations and operations are the same as those of the first embodiment, and therefore, are denoted by the same reference numerals and description thereof will be omitted.
[0038]
[Fifth Embodiment]
FIG. 12 is a front sectional view of a high-frequency heating device with an open function provided with a weight detecting device according to a fifth embodiment, FIG. 13 is a right side view of the same, and FIG.
[0039]
As shown in the figure, in the present embodiment, even when a plurality of weight detection devices 20 are arranged in the height direction, the weight detection can be performed by one weight detection unit 22, which is different from the fourth embodiment. The load is transmitted to one weight detecting unit 22 by each operating unit.
[0040]
That is, the weight detection device 20 of the present embodiment has two operating bodies 21a and 21b installed in two levels in the height direction on both side walls of the heating chamber 2, and the upper operating body 21a is A horizontal arm 25a protruding horizontally through the hole 23a of the side wall 3a and having a mounting table support portion 24a at the tip and a vertical arm protruding from the rotation center Aa at the tip and an action portion 26a to the weight detection unit 22 at the tip. And a vertical arm 27a.
[0041]
On the other hand, similarly to the first embodiment, the lower operating body 21b also horizontally projects through the hole 23b of the heating chamber side wall 3a to the heating chamber side, and has a horizontal arm 25b having a mounting table support portion 24b at the tip, A vertical arm 27b protruding from the rotation center Ab in the vertical direction and having an operating portion 26b for the weight detecting portion 22 at the end is formed in a substantially L shape.
[0042]
The lower vertical arm 27b is arranged in parallel outside the vertical arm 27a of the upper operating body 21a, and is formed to be long in the vertical direction so as to reach near the upper end of the vertical arm 27a. The action portions 26a and 26b of the upper and lower operating bodies 21a and 21b are arranged so as to be overlapped on the same line with respect to the weight detection unit 22, and transmit a load to the weight detection unit 22.
[0043]
In the two operating bodies 21a and 21b as described above, since the distances from the respective fulcrums Aa and Ab to the acting parts 26a and 26b are different, the output of the weight detecting part 22 differs depending on the position of the mounting table 11 even with the same weight. Will be.
[0044]
Therefore, the position of the mounting table 11 is recognized, and the control unit performs a calculation according to the position to calculate the weight of the object to be heated. As a method of recognizing the position of the mounting table 11, a method of recognizing by a light receiving and emitting element, a method of recognizing by inputting position information of a user to a control unit, and a method of recognizing from selection information of a heating menu Any of these may be adopted.
[0045]
In the present embodiment, the mounting table position recognizing means 50 includes a light emitting element 51 disposed above the upper mounting table, and a light receiving element 52 disposed between the upper and lower mounting tables. A window portion 53 through which light from the light emitting element 51 can pass is formed in 3a.
[0046]
The light emitting element 51 is disposed outside the side wall 3a on the side of the functional component accommodating portion of the heating chamber 2, and the light receiving element 52 operates downward on the outside of the side wall 3a opposite to the side wall 3a of the heating chamber where the functional component is disposed. It is arranged at a position corresponding to the window 53 of the side wall 3a at an intermediate position of the vertical arm 27b of the body 21b.
[0047]
When the control unit (not shown) determines that the mounting table 11 is placed at any height based on the output of the weight detection unit 22, the control unit (not shown) determines the following based on the output of the light receiving element 52, and Calculate the weight of That is, when the light receiving element 52 receives the light, since there is no light blocking by the upper mounting table, it is determined that the mounting table 11 is mounted on the lower stage, and the rotation of the lower operating body 21b from the rotation center Ab is determined. The weight of the object to be heated is calculated in consideration of the distance to the action section 26b.
[0048]
On the other hand, when the light receiving element 52 cannot detect the light, it is determined that the light is blocked by the upper mounting table 11, and it is determined that the mounting table 11 is mounted on the upper stage, and the operating portion is determined from the rotation center Aa of the upper operating body 21a. The weight of the object to be heated is calculated in consideration of the distance to 26a.
[0049]
Other configurations and operations are the same as those of the first embodiment, and therefore, are denoted by the same reference numerals and description thereof will be omitted.
[0050]
[Sixth Embodiment]
FIGS. 15 and 16 are enlarged views of a main part of a weight detection device 20 according to a sixth embodiment, in which means for bringing the action section 26 and the weight detection section 22 into point contact, respectively, is used. As a means for causing this, the protruding portion 60 or 61 is formed on the acting portion 26 or the weight detecting portion 22.
[0051]
Since the action section 26 rotates around the fulcrum A, the load point on the weight detection section 22 becomes constant by bringing the action section 26 into point contact with the weight detection section 22 to obtain a highly reliable output. Can be.
[0052]
As shown in FIG. 15, the operating body 21 including the action portion 26 is often formed of resin, and therefore, the projection 60 can be easily formed.
[0053]
Also, in order to stabilize the output of the weight detecting unit 22, by forming a protrusion 61 on the weight detecting unit 22, as shown in FIG. Can be obtained.
[0054]
The protrusions 60 and 61 shown in FIGS. 15 and 16 can be applied to any of the first to fifth embodiments, and in any case, a suitable mode for obtaining a highly reliable output. Become.
[0055]
【The invention's effect】
As is clear from the above description, according to the present invention, the load of the mounting table on which the object to be heated is mounted is transferred from the action section to the weight detection section via the substantially L-shaped operating body whose rotation center is outside the heating chamber. , The reliability of the weight detection device is increased, and space saving can be realized.
[Brief description of the drawings]
1 is a front sectional view of a high-frequency heating cooker provided with a weight detecting device according to the present invention; FIG. 2 is a right side view thereof; FIG. 3 is a plan sectional view thereof; FIG. FIG. 5 is a side view of the same. FIG. 6 is an enlarged front view of a main part of the weight detector. FIG. 7 is an enlarged front view of a main part of the weight detector according to the second embodiment. FIG. FIG. 9 is a front sectional view of a high-frequency heating cooker according to a fourth embodiment. FIG. 10 is a right side view thereof. FIG. 11 is an enlarged view of a main part of the weight detection device. FIG. 12 is a front sectional view of a high-frequency heating device showing a fifth embodiment. FIG. 13 is a right side view thereof. FIG. 14 is an enlarged view of a main part of a weight detection device. FIG. 16 is an enlarged view of a main part of a weight detection device having a projection formed on an action portion side. FIG. 16 is a sixth embodiment. Enlarged view of the weight detection apparatus forming a protrusion on the weight detecting portion 11. DESCRIPTION OF SYMBOLS]
REFERENCE SIGNS LIST 1 heating cooker 2 heating chamber 3 heating box 4 outer box 5 functional component 6 electric heating heater 7 turntable 11 mounting table 20 weight detecting device 21 operating body 22 weight detecting unit 24 mounting table support unit 25 horizontal arm 26 operating unit 27 Vertical arm 32 Holding plate 40 Connecting portion 51 Light emitting element 52 Light receiving element 60 Projection 61 Projection

Claims (9)

An actuating body rotatable about a fulcrum located outside the side wall of the heating chamber, and a weight detector that detects a load applied to the actuating body,
The operating body horizontally projects through the hole in the side wall of the heating chamber to the heating chamber side and has a mounting table support at the tip, and a vertical arm projecting vertically from the rotation center and acts on the tip to the weight detection unit. A weight detecting device for a heating cooker, which is formed in a substantially L-shape from a vertical arm having a portion. A weight detector for a heating cooker, wherein a plurality of the weight detectors according to claim 1 are arranged in the height direction of the heating chamber. An actuating body rotatable about a fulcrum located outside the side wall of the heating chamber, and a weight detector that detects a load applied to the actuating body,
A plurality of the operating bodies are provided in the height direction of the heating chamber, and each operating body projects horizontally to the heating chamber side through a hole in a side wall of the heating chamber and has a mounting table support portion at a tip thereof, A coupling portion for synchronizing the rotation of each of the operating bodies, and a vertical arm protruding vertically from the rotation center of any one of the operating bodies and having an operating portion for a weight detecting section at a tip thereof. Heating cooker weight detector. An operating body rotatably supported around a fulcrum located outside the side wall of the heating chamber, and a weight detecting unit for detecting a load applied to the operating body,
The operating body is disposed in a plurality in the height direction of the heating chamber, each operating body projects horizontally to the heating chamber side through a hole in the side wall of the heating chamber, and a horizontal arm having a mounting table support portion at the tip, A vertical arm protruding from the rotation center of the operating body in the vertical direction and having a vertical arm having an operating portion for the weight detecting portion at the tip is formed in a substantially L shape, and each operating portion is set so as to act on one weight detecting portion. A weight detector for a heating cooker, characterized in that: 5. The weight detection device according to claim 4, further comprising a recognition unit configured to recognize at which height the mounting table is arranged, and correcting an output value of the weight detection unit according to a result of the recognition. Characteristic device for detecting the weight of a cooking device. The recognizing means includes a light emitting element and a light receiving element, and one of the light emitting element and the light receiving element is disposed above the upper mounting table, and the other is disposed between the upper and lower mounting tables. The weight detection device for a heating cooker according to claim 5, wherein The weight detection device for a heating cooker according to any one of claims 1 to 4, wherein the action portion and the weight detection portion are brought into point contact with each other. The weight detecting device according to claim 7, wherein a protrusion for making a point contact between the operating portion and the weight detecting portion is formed on the operating portion. 8. The weight detecting device for a heating cooker according to claim 7, wherein a protrusion for making a point contact between the acting portion and the weight detecting portion is formed on the weight detecting portion.

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