CN110631063A

CN110631063A - Heating cooker

Info

Publication number: CN110631063A
Application number: CN201910514882.6A
Authority: CN
Inventors: 北村将章
Original assignee: Linnei Corp
Current assignee: Linnei Corp
Priority date: 2018-06-25
Filing date: 2019-06-14
Publication date: 2019-12-31
Anticipated expiration: 2039-06-14
Also published as: CN110631063B; JP7122884B2; KR20200000799A; JP2020003087A; TWI801489B; KR102673251B1; TW202002715A

Abstract

The invention provides a heating cooker. The heating cooker can prevent misoperation without reducing operability. The heating cooker is provided with an operating mechanism for a user to perform operations related to the heating operation of the heating mechanism (3), and a control mechanism (12) for controlling the heating mechanism (3) based on the operations of the operating mechanism. The operation unit is provided with contact operation parts (4, 5, 6) operated by the contact of a user, a contact detection unit (17) for detecting the contact of the contact operation parts (4, 5, 6), and a pressing detection unit (18) for detecting the pressing of the contact operation parts (4, 5, 6). When the contact of the contact operation parts (4, 5, 6) is detected by the contact detection unit (17) and the pressing of the contact operation parts (4, 5, 6) is detected by the pressing detection unit (18), the control unit (12) controls the heating unit based on the operation of the operation unit.

Description

Heating cooker

Technical Field

The present invention relates to a heating cooker that performs an operation related to a heating operation by a user touching the heating cooker with a finger or the like.

Background

Conventionally, in a heating cooker such as a stove equipped with a glass top plate, a device is known in which a user can perform an operation related to a heating operation by touching a part of the top plate with a finger (for example, see patent document 1 below).

A plurality of contact operation portions that are touched by a user when operating are set ON a surface of a part of the top plate in accordance with the contents of the heating operation (ON/OFF, heating power change, and the like). Each of the touch operation portions is provided with a capacitance type switch (so-called touch key) that can detect that a user touches the touch operation portion with a finger.

When it is determined that the user has touched the respective touch operation portions and operated, the control unit for controlling the heating unit of the heating cooker performs the heating operation according to the contents (ON/OFF, heating power change, etc.) of the heating operation corresponding to the touch operation portion whose contact is detected.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-186846

Disclosure of Invention

Problems to be solved by the invention

However, the user may erroneously come into contact with the contact operation portion when, for example, a spill or a water droplet adhering to the top plate during cooking is wiped off. In this case, even if the user performs an operation unintentionally, the user may be determined to perform the operation by only making a slight touch with the touch operation portion by mistake, and an action that the user does not attempt may be performed.

Therefore, the device of patent document 1 is normally set to a locked state in which the contact with the contact operation portion is invalidated, and when the lock release portion is operated, the device can be operated by releasing the locked state.

However, each time a desired operation is performed, the lock releasing unit must be operated to release the locked state, which is troublesome and poor in operability.

In view of the above problems, an object of the present invention is to provide a heating cooker capable of preventing erroneous operation without lowering operability.

Means for solving the problems

In order to achieve the above object, in the present invention, a heating cooker includes a heating unit for heating an object to be cooked, an operation unit for performing an operation related to a heating operation of the heating unit by a user, and a control unit for controlling the heating unit based on the operation of the operation unit,

the operation unit includes a contact operation portion operated by a user's contact, a contact detection unit detecting contact with the contact operation portion, and a pressing detection unit detecting pressing of the contact operation portion,

the control unit controls the heating unit based on an operation of the operation unit when the contact of the contact operation portion is detected by the contact detection unit and when the pressing of the contact operation portion is detected by the pressing detection unit.

According to the present invention, by providing the contact detection unit and the press detection unit, the contact and the press on the contact operation portion can be detected simultaneously. The control unit detects contact of the contact detection unit with the contact operation unit, and controls the heating unit only when the pressing detection unit detects pressing of the contact operation unit. Thus, the user can perform a desired operation when pressing the touch operation portion with the intention of the operation, and can be prevented from performing an unexpected operation when the user lightly and erroneously touches the touch operation portion.

Further, in the present invention, it is only necessary to prevent an erroneous operation by the user pressing the touch operation portion. This eliminates the need for complicated operation such as unlocking for preventing erroneous operation as in the conventional art, and thus the operability is hardly reduced.

In the present invention, it is preferable that the control unit controls the heating unit based on an operation of the operation unit only when the pressing of the contact operation unit is detected by the pressing detection unit in a state where the contact of the contact operation unit is detected by the contact detection unit.

Thus, when the pressing detection unit detects a state in which the contact operation unit is pressed, the control of the heating unit can be omitted even if the contact detection unit detects contact with the contact operation unit. That is, for example, when the periphery of the cleaning contact operation unit is wiped with a strong force, the pressing detection unit detects the pressing, and even if the contact operation unit is erroneously touched in a state where the pressing detection unit detects the pressing, it is not determined that the pressing is an operation of the contact operation unit by the user, and thus malfunction can be prevented.

In addition, in the present invention, it is preferable that the present invention has the following features: the operation unit includes a flat plate portion having the contact operation portion set on a surface thereof, the flat plate portion being formed of an electrically insulating material, the contact detection unit includes a capacitance-type contact detection element and detects contact of a user with the contact operation portion based on information indicating a change in capacitance of the contact operation portion of the flat plate portion obtained from the contact detection element, and the pressing detection unit includes a pressure-sensitive element and detects pressing of the contact operation portion by the user based on information indicating at least one of displacement and deformation of the flat plate portion in the contact operation portion accompanying pressing force received by the flat plate portion obtained from the pressure-sensitive element.

According to the present invention, the contact of the touch operation portion can be reliably detected based on the change in the capacitance by the capacitance-type touch detection element provided in the touch detection unit. Further, the pressure-sensitive element provided in the pressing detection means can detect the displacement or deformation of the flat plate portion in the contact operation portion, and can reliably detect that the contact operation portion is pressed. This makes it possible to clearly detect the contact and the pressing, respectively, and to accurately determine whether or not the operation is an erroneous operation.

In the cooking device of the present invention, it is preferable that the pressure-sensitive element of the pressing force detection means is provided at a position apart from the contact operation portion within a range in which the pressing force applied to the contact operation portion can be detected.

For example, when there are a plurality of contact operating portions, a contact detecting element is provided on each of the contact operating portions, respectively. This makes it possible to easily determine which touch operation unit the user touches. On the other hand, it is sufficient if the displacement or deformation of the flat plate portion accompanying the pressing can be detected to determine whether or not the user has pressed the touch operation portion. Therefore, it is not necessary to provide a pressure sensitive element for each touch operation portion, and it is possible to determine whether or not the user has pressed the touch operation portion even with a single pressure sensitive element as long as the range in which the pressing of all the touch operation portions can be detected.

Therefore, according to the present invention, the pressure sensitive elements are provided at the positions apart from the contact detecting elements within the range where the pressing can be detected, the number of the pressure sensitive elements can be set smaller than the number of the contact operating portions, and the increase in cost can be prevented. In addition, when the contact operation portion is single, the pressure-sensitive element can be separated from the contact operation portion, so that a sufficient mounting space for the contact detection element can be secured.

In the present invention, the flat plate portion is a top plate made of glass, and the heating means can be applied to a heating cooker for heating an object to be cooked on the top plate. That is, when the contact operation portion is provided on the glass top plate, the contact detection means can maintain the top surface of the top plate as a smooth surface, and the contact operation portion can be provided without reducing the cleaning performance of the top surface of the top plate. In addition, when the heating unit heats the object to be cooked on the top plate, if dirt formed by overflowing adheres to the top plate, the dirt needs to be wiped off, even if the user touches the contact operation part by mistake, because the pressing detection unit does not detect pressing, misoperation is not caused, and therefore, the cooking action which is not expected by the user is not executed, thereby preventing the cooking failure and having good convenience.

Drawings

Fig. 1 is an explanatory plan view showing a main part of a heating cooker according to an embodiment of the present invention.

Fig. 2 is a block diagram schematically showing the structure of a heating cooker according to the present embodiment.

Fig. 3A is an explanatory view of the contact operation unit in an unoperated state.

Fig. 3B is an explanatory view of the contact operation unit in an operation state.

Fig. 4A is a diagram showing an output voltage of the piezoelectric element at a short timing.

Fig. 4B is a diagram showing the output voltage of the piezoelectric element for a long time.

Fig. 5 is an explanatory diagram showing an example of a positional relationship between the touch switch and the piezoelectric element.

Description of the symbols

1 … heating cooker, 2 … top plate (flat plate part), 3 … stove burner (heating unit), 4 … power supply operation part (contact operation part), 5 … fire power adjustment operation part (contact operation part), 6 … timer setting operation part (contact operation part), 7,8a, 8b, 9a, 9b … touch switch (contact detection element), 12 … operation control part (control unit), 16 … piezoelectric element (pressure sensitive element), 17 … contact detection part (contact detection unit), 18 … pressing detection unit (pressing detection unit).

Detailed Description

An embodiment of the present invention will be described based on the drawings. As shown in fig. 1, a heating cooker 1 of the present embodiment is a gas cooker including a top plate 2 formed of glass as an electrical insulator and a cooker burner 3 exposed upward from the top plate 2. A power supply operation unit 4 on which a power supply flag is displayed, a heating power adjustment operation unit 5 on which a heating power flag is displayed, and a timer setting operation unit 6 on which a timer flag is displayed are provided in a region near the top panel 2. The stove burner 3 corresponds to the heating device of the present invention, and the power supply operation portion 4, the heating power adjustment operation portion 5, and the timer setting operation portion 6 correspond to the contact operation portion of the present invention, respectively. A part of the top plate 2 (a region where the power supply operation unit 4, the heating power adjustment operation unit 5, and the timer setting operation unit 6 are provided) corresponds to the flat plate portion of the present invention.

The power supply operation unit 4, the heating power adjustment operation unit 5, and the timer setting operation unit 6 are provided with

capacitive touch switches

7,8a, 8b, 9a, and 9b on the back surface side of the top plate 2. The touch switches 8a and 8b are provided at the positions of the positive and negative marks of the thermal power adjustment operation unit 5. The touch switches 9a and 9b are provided at positions of the up/down marks of the timer setting operation section 6. The touch switches 7,8a, 8b, 9a, 9b correspond to the contact detection elements of the present invention.

As shown in fig. 2, a fuel gas supply pipe 10 for supplying fuel gas to the burner 3 is provided with a valve device 11 for adjusting the fuel gas to a fuel gas amount corresponding to the heating power of the burner 3. The valve device 11 is controlled by the operation control unit 12. The stove burner 3 is ignited by a spark plug 14 driven by an igniter 13, and flame is detected by a thermocouple 15. The igniter 13 and the thermocouple 15 are connected to the operation control unit 12. The operation control unit 12 corresponds to the control means of the present invention.

A piezoelectric element 16 such as a piezoelectric thin film sensor is provided on the back surface side of the top plate 2 at a position away from the touch switches 7,8a, 8b, 9a, and 9 b. The piezoelectric element 16 corresponds to the pressure-sensitive element of the present invention.

As shown in fig. 2, the touch switch 7 is connected to the operation control unit 12 via a contact detection unit 17. The piezoelectric element 16 is connected to the operation control unit 12 via the pressing force detection unit 18.

In the present embodiment, the touch switches 7,8a, 8b, 9a, and 9b (see fig. 1), the contact detection unit 17, the piezoelectric element 16, the press detection unit 18, and a part of the top plate 2 (a region in which the power supply operation unit 4, the heating power adjustment operation unit 5, and the timer setting operation unit 6 are provided) constitute the operation unit of the present invention. In fig. 2, only the touch switch 7 of the power supply operation unit 4 is shown, and the

other touch switches

8a, 8b, 9a, and 9b are omitted.

The contact detection unit 17 detects whether or not the user touches the position of the power supply operation unit 4 (power supply flag) on the top panel 2 based on, for example, a change in capacitance output from the touch switch 7 of the power supply operation unit 4, and outputs information indicating the touch when the position of the power supply operation unit 4 (power supply flag) is touched.

The pressing detection unit 18 detects whether or not the user presses the power source operation unit 4 (the position of the power source flag) of the top plate 2 based on the change in the voltage output from the piezoelectric element 16, for example, and outputs information indicating the pressing when the user presses the power source operation unit 4 (the position of the power source flag). The same applies to the

other operation units

5 and 6.

At this time, the voltage output from the piezoelectric element 16 changes due to the following: for example, when the top plate 2 is pressed from the flat state as shown in fig. 3A, for example, by the power source operation unit 4 (the position of the power source mark), the top plate 2 is deformed, such as bending, twisting (distortion み), and compression, and the piezoelectric element 16 is displaced as shown in fig. 3B in an exaggerated manner for convenience of explanation.

When the output voltage of the piezoelectric element 16 accompanying the deformation and displacement of the top plate 2 is short-pressed, an abrupt vertical change occurs with respect to the normal position X as shown in fig. 4A. When the voltage output from the piezoelectric element 16 changes to the upper and lower levels, the pressing detection unit 18 determines that the pressing operation (normally, a short press) has been performed.

In the case of a long press, as shown in fig. 4B, the output voltage of the piezoelectric element 16 is temporarily raised from the normal position X and returned to the normal position X when the top plate 2 is pressed, and is lowered from the normal position X and returned to the normal position X when the top plate 2 is released from the pressing. The pressing detection unit 18 can also determine that the long pressing operation has been performed when the voltage output from the piezoelectric element 16 changes to the state shown in fig. 4B.

As shown in fig. 2, the contact detection unit 17 and the pressing detection unit 18 are connected to the operation control unit 12, and the operation control unit 12 acquires information on contact with each of the

operation units

4, 5, and 6 (information indicating contact with any of the operation units) obtained by detection by the contact detection unit 17 and information on pressing of each of the

operation units

4, 5, and 6 (information indicating pressing of any of the operation units) obtained by detection by the pressing detection unit 18.

When it is determined that the user touches or presses the power operation unit 4, for example, the operation control unit 12 turns on the power of the heating cooker 1 to make an operation preparation state. On the other hand, even when the contact detection unit 17 detects that the user has touched the power operation unit 4, for example, but does not detect pressing from the pressing detection unit 18, the operation control unit 12 does not turn on the power of the heating cooker 1 and maintains the off state. The same determination and control are performed in the

other operation units

5 and 6.

More specifically, in the operation control unit 12 of the present embodiment, the operation control unit 12 turns on the power of the heating cooker 1 only when, for example, the user touches the power operating unit 4 to obtain a contact detection signal from the contact detection unit 17 (a state in which the contact state is maintained), and then the user presses the power operating unit 4 to obtain pressed detection information from the press detection unit 18. The same applies to the other operating units.

According to the above configuration, even if the user slightly touches any of the

operation units

4, 5, and 6 by mistake or if dirt or water that has overflowed adheres to the

operation units

4, 5, and 6, information indicating the operation is output from the contact detection unit 17, the operation control unit 12 does not perform control corresponding to the operation if the detection information of the pressing from the pressing detection unit 18 is not obtained.

Alternatively, when the user sweeps the top surface of the top plate 2 with a strong force, in a state where the detection information of the pressing from the pressing detection portion 18 is obtained, the user erroneously touches any of the operation portions to output the information indicating the operation from the contact detection portion 17, and the operation control portion 12 does not perform the control corresponding to the operation.

Therefore, the user can determine that the operation is not an erroneous operation and can perform a desired operation by pressing the

operation portions

4, 5, and 6 corresponding to the desired operation, and the operability is good.

In the present embodiment, the operation control unit 12 performs control corresponding to an operation only when the detection signal of the contact from the contact detection unit 17 is acquired (the contact state is maintained) and then the detection information of the press from the press detection unit 18 is acquired, thereby reliably eliminating the erroneous operation. In addition, the operation control unit 12 may perform control corresponding to an operation when a detection signal of contact from the contact detection unit 17 is acquired and detection information of pressing from the pressing detection unit 18 is acquired. This reduces the accuracy of recognizing the erroneous operation, but simplifies the control.

The touch switches 7,8a, 8b, 9a, and 9b are provided at respective positions of the power supply operation unit 4, the heating power adjustment operation unit 5, and the timer setting operation unit 6. However, the number of piezoelectric elements 16 may be set to be smaller than the following number (1 in the present embodiment): the number of the operation portions within a range in which any one of the

operation portions

4, 5, and 6 is deformed or displaced by the pressing force applied thereto when pressed. This makes it possible to dispose the piezoelectric element 16 at a position apart from the touch switches 7,8a, 8b, 9a, and 9b, and thus to prevent the space for disposing the touch switches 7,8a, 8b, 9a, and 9b from being narrowed by the piezoelectric element 16.

In addition, when the piezoelectric element 16 is employed, since the magnitude of the pressing force can be recognized, the pressed position can be determined based on the output voltage of the piezoelectric element 16. Therefore, for example, as shown in fig. 5, by providing the piezoelectric element 16 at a position where the distance a from the power supply operation unit 4 is substantially equal to the distance b from the timer setting operation unit 6 and setting the distance c between the piezoelectric element 16 and the thermal power adjustment operation unit 5 to be larger than the distance from the power supply operation unit 4 and the distance from the timer setting operation unit 6, it is possible to easily distinguish the operation of the thermal power adjustment operation unit 5 from the operation of the

other operation units

4 and 6. This enables to determine which of the

operation portions

4, 5, and 6 is pressed with high accuracy.

In the gas stove recited in the embodiment of the cooking device 1, the flat plate portion of the present invention is set as the top plate 2, but the present invention is not limited to the top plate 2, and the flat plate may be arranged as a front plate (not shown) of the gas stove. In this case, the portion of the front plate of the gas burner corresponding to the flat plate portion is formed of an electrical insulator (other than metal).

Further, instead of integrally forming the flat plate portion provided with the contact operation portion and a part of the top plate 2 or the front plate of the gas burner, the top plate 2 or the front plate and the flat plate portion may be provided separately. Thus, the pressing detection unit can detect the pressing of the contact operation unit based on the displacement and deformation of the contact operation unit.

In the present embodiment, the heating cooker 1 having the stove burner 3 is described as an example of the heating means, but the present invention is not limited to this, and the present invention can be applied to a heating cooker, a microwave oven, an oven, and the like having an induction heating coil as the heating means.

Claims

1. A heating cooker comprising a heating means for heating an object to be cooked, an operation means for performing an operation related to a heating operation of the heating means by a user, and a control means for controlling the heating means based on the operation of the operation means,

the heating cooker is characterized in that,

2. The heating cooker according to claim 1,

the control unit controls the heating unit based on an operation of the operation unit only when the pressing of the contact operation unit is detected by the pressing detection unit in a state where the contact of the contact operation unit is detected by the contact detection unit.

3. The heating cooker according to claim 1 or 2,

the operation unit includes a flat plate portion on the surface of which the contact operation portion is set,

the flat plate portion is formed of an electrical insulator,

the contact detection means includes a capacitance-type contact detection element for detecting a contact of a user with the contact operation portion based on information indicating a change in capacitance of the contact operation portion of the flat plate portion obtained from the contact detection element,

the pressing detection means includes a pressure-sensitive element, and detects pressing of the contact operation portion by the user based on information obtained by the pressure-sensitive element and indicating at least one of displacement and deformation of the flat plate portion in the contact operation portion accompanying the pressing force applied to the flat plate portion.

4. The heating cooker according to claim 3,

the pressure-sensitive element of the pressing detection unit is provided at a position apart from the contact operation portion within a range in which the pressing of the contact operation portion can be detected.

5. The heating cooker according to claim 3,

the flat plate portion is a top plate made of glass,

the heating unit heats the object to be cooked on the top plate.