CN204442332U - Touch controlled key and there is its electric cooking pot - Google Patents
Touch controlled key and there is its electric cooking pot Download PDFInfo
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- CN204442332U CN204442332U CN201520146624.4U CN201520146624U CN204442332U CN 204442332 U CN204442332 U CN 204442332U CN 201520146624 U CN201520146624 U CN 201520146624U CN 204442332 U CN204442332 U CN 204442332U
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- controlled key
- touch controlled
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Abstract
The utility model discloses a kind of touch controlled key, it comprises: foil gauge, and one end of described foil gauge is connected with default power supply; Reference resistance, one end of described reference resistance is connected with the other end of described foil gauge, has first node between one end of described reference resistance and the other end of described foil gauge, the other end ground connection of described reference resistance; Control chip, described control chip is connected with described first node, and described control chip is by detecting the voltage of described first node to judge whether described foil gauge is pressed.This touch controlled key by the high precision collecting of miniature deformation realization to push button signalling, can be widely used in high accuracy material surface.The invention also discloses a kind of electric cooking pot with above-mentioned touch controlled key.
Description
Technical field
The utility model relates to living electric apparatus technical field, particularly a kind of touch controlled key and a kind of electric cooking pot with this touch controlled key.
Background technology
At present, in household electrical appliance such as electric cooking pot, the operation interface with touch controlled key can mostly be adopted.Touch controlled key in operation interface generally includes mechanical switch class touch controlled key, electric capacity or resistance class touch key-press, usual pressure sensor class touch controlled key etc.
The shortcoming that prior art exists is that, for mechanical switch class touch controlled key, user needs certain dynamics to trigger; For electric capacity or resistance class touch key-press, sense of touch is poor, and it is poor to experience, and easily causes keys deactivation because moisture, oil film etc. disturb; For usual pressure sensor class touch controlled key, signals collecting low precision, and be not suitable for miniature deformation, high accuracy material surface button.
Utility model content
The purpose of this utility model is intended at least solve one of above-mentioned technological deficiency.
For this reason, an object of the present utility model is to propose a kind of touch controlled key that can react miniature deformation, realize push button signalling high precision collecting.
Another object of the present utility model is to propose a kind of electric cooking pot.
For achieving the above object, a kind of touch controlled key that the utility model proposes, comprising: foil gauge, and one end of described foil gauge is connected with default power supply; Reference resistance, one end of described reference resistance is connected with the other end of described foil gauge, has first node between one end of described reference resistance and the other end of described foil gauge, the other end ground connection of described reference resistance; Control chip, described control chip is connected with described first node, and described control chip is by detecting the voltage of described first node to judge whether described foil gauge is pressed.
According to the touch controlled key that the utility model proposes, reflect whether foil gauge miniature deformation occurs and namely whether is pressed by the voltage detecting first node, thus can judge whether have actuation of keys, therefore, it is possible to realize the high precision collecting to push button signalling by miniature deformation, high accuracy material surface can be widely used in.
Wherein, described foil gauge is any one in wire form resistance strain gage, foil resistance foil gauge or semiconductor gauge.
Preferably, described semiconductor gauge comprises film-type semiconductor gauge, diffused semiconductor gauge and extension type semiconductor gauge.
Particularly, the first amplifying circuit, filter circuit and analog to digital converter is also connected with between described first node and described control chip, wherein, the input of described first amplifying circuit is connected with described first node, the output of described first amplifying circuit is connected with the input of described filter circuit, the output of described filter circuit is connected with the input of described analog to digital converter, and the output of described analog to digital converter is connected with described control chip.
Further, between described filter circuit and described analog to digital converter, the second amplifying circuit is also connected with.
Preferably, described first amplifying circuit and described second amplifying circuit all can be discharge circuit, transistor amplifier or metal-oxide-semiconductor amplifying circuit.
Preferably, described filter circuit comprises passive filter circuit, active filter circuit or isolator circuit.
Preferably, the surface of described touch controlled key can be made up of one or more of metal material, timber, stone material or diamond material.
In addition, the utility model also proposed a kind of electric cooking pot, and it comprises above-mentioned touch controlled key.
This electric cooking pot, can by the high precision collecting of miniature deformation realization to push button signalling by above-mentioned touch controlled key, and therefore its operation interface can be made up of high accuracy material.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the circuit diagram of the touch controlled key according to the utility model embodiment;
Fig. 2 is the equivalent model schematic diagram of the foil gauge according to the utility model embodiment;
Fig. 3 is the circuitry block schematic diagram of the touch controlled key according to the utility model embodiment;
Fig. 4 is the circuitry block schematic diagram of the touch controlled key according to another embodiment of the utility model; And
Fig. 5 is the block diagram of the electric cooking pot according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The touch controlled key proposed according to the utility model embodiment and the electric cooking pot with this touch controlled key are described with reference to the accompanying drawings.
Fig. 1 is the circuit diagram of the touch controlled key according to the utility model embodiment.As shown in Figure 1, this touch controlled key comprises foil gauge 10, reference resistance R1 and control chip 20.
Wherein, one end of foil gauge 10 is connected with default power supply VCC/VDD, and one end of reference resistance R1 is connected with the other end of foil gauge 10, has first node a between one end of reference resistance R1 and the other end of foil gauge 10, the other end ground connection of reference resistance R1.Control chip 20 is connected with first node a, and control chip 20 is by detecting the voltage Va of first node a to judge whether foil gauge 10 is pressed.That is, if there is slight force to press foil gauge 10, there is deformation in foil gauge 10, its resistance R changes, control chip 20 determines whether actuation of keys by the change in voltage detecting first node a, thus is realized push button signalling high precision collecting by miniature deformation.
Specifically, the resistance R of reference resistance R1 and foil gauge 10 forms closed-loop path, wherein, the voltage Va=VCC*R1/ (R+R1) of first node a, the resistance of reference resistance R1 and the voltage of default power supply VCC constant, the voltage Va of first node a changes with the resistance R of foil gauge 10 and changes.
As shown in Figure 2, when user starts to press foil gauge, the resistance R=R0 of foil gauge (R0 is the resistance of foil gauge when not being in pressed state); When foil gauge is in pressed state, the resistance R ≠ R0 of foil gauge, wherein, the type variable of foil gauge directly determines sense of touch and sensitivity; When user looses one's grip, the now resistance R ≈ R0 of foil gauge.
Therefore, according to the resistance variations of foil gauge, reflect the change in voltage of first node a, thus can judge with or without actuation of keys.
According to an embodiment of the present utility model, foil gauge can be any one in wire form resistance strain gage, foil resistance foil gauge or semiconductor gauge.
Further, semiconductor gauge can comprise film-type semiconductor gauge, diffused semiconductor gauge and extension type semiconductor gauge.
Be understandable that, in embodiment of the present utility model, there is deformation in foil gauge under small external force, thus cause its resistance to change.
According to an embodiment of the present utility model, as shown in Figure 3, the first amplifying circuit 30, filter circuit 40 and analog to digital converter 50 is also connected with between first node a and control chip 20, wherein, the input of the first amplifying circuit 30 is connected with first node a, the output of the first amplifying circuit 30 is connected with the input of filter circuit 40, and the output of filter circuit 40 is connected with the input of analog to digital converter 50, and the output of analog to digital converter 50 is connected with control chip 20.
Wherein, when judging whether foil gauge deformation occurs, first can the voltage of timing scan first node a, then carry out signal by the voltage of the first amplifying circuit 30 to the first node a scanned and amplify process, then by filter circuit 40, filtering process is carried out to the signal after amplification, the interference signals such as filter out noise, and by analog to digital converter 50, Collect conversion is carried out to filtered signal, convert digital signal to, finally by control chip 20 such as MCU process, and returning key value, MCU carries out key scan next time.
According to another embodiment of the present utility model, as shown in Figure 4, between filter circuit 40 and analog to digital converter 50, also can be connected with the second amplifying circuit 60, second amplifying circuit 60 can amplify the voltage signal secondary after filtering interference signals.
Wherein, the first amplifying circuit 30 and the second amplifying circuit 60 all can be discharge circuit, transistor amplifier or metal-oxide-semiconductor amplifying circuit.
Further, filter circuit 40 can comprise passive filter circuit, active filter circuit or isolator circuit.
In embodiment of the present utility model, because foil gauge has higher sensitivity, therefore, the surface of touch controlled key can be made up of one or more of metal material, timber, stone material or diamond material, can be widely used in high accuracy material surface.
According to the touch controlled key that the utility model embodiment proposes, reflect whether foil gauge miniature deformation occurs and namely whether is pressed by the voltage detecting first node, thus can judge whether have actuation of keys, therefore, it is possible to realize the high precision collecting to push button signalling by miniature deformation, high accuracy material surface can be widely used in.
In addition, as shown in Figure 5, embodiment of the present utility model also proposed a kind of electric cooking pot 100, and it comprises above-mentioned touch controlled key 200.
Wherein, electric cooking pot can be electric cooker, electromagnetic oven, electric pressure cooker etc., and above-mentioned touch controlled key can be arranged on the operation interface of electric cooking pot.
The electric cooking pot of the utility model embodiment, can by the high precision collecting of miniature deformation realization to push button signalling by above-mentioned touch controlled key, and therefore its operation interface can be made up of high accuracy material.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalency thereof.
Claims (9)
1. a touch controlled key, is characterized in that, comprising:
Foil gauge, one end of described foil gauge is connected with default power supply;
Reference resistance, one end of described reference resistance is connected with the other end of described foil gauge, has first node between one end of described reference resistance and the other end of described foil gauge, the other end ground connection of described reference resistance;
Control chip, described control chip is connected with described first node, and described control chip is by detecting the voltage of described first node to judge whether described foil gauge is pressed.
2. touch controlled key as claimed in claim 1, is characterized in that, described foil gauge is any one in wire form resistance strain gage, foil resistance foil gauge or semiconductor gauge.
3. touch controlled key as claimed in claim 2, it is characterized in that, described semiconductor gauge comprises film-type semiconductor gauge, diffused semiconductor gauge and extension type semiconductor gauge.
4. touch controlled key as claimed in claim 1, it is characterized in that, the first amplifying circuit, filter circuit and analog to digital converter is also connected with between described first node and described control chip, wherein, the input of described first amplifying circuit is connected with described first node, the output of described first amplifying circuit is connected with the input of described filter circuit, the output of described filter circuit is connected with the input of described analog to digital converter, and the output of described analog to digital converter is connected with described control chip.
5. touch controlled key as claimed in claim 4, is characterized in that, between described filter circuit and described analog to digital converter, be also connected with the second amplifying circuit.
6. touch controlled key as claimed in claim 5, it is characterized in that, described first amplifying circuit and described second amplifying circuit all can be discharge circuit, transistor amplifier or metal-oxide-semiconductor amplifying circuit.
7. touch controlled key as claimed in claim 4, it is characterized in that, described filter circuit comprises passive filter circuit, active filter circuit or isolator circuit.
8. the touch controlled key according to any one of claim 1-7, is characterized in that, the surface of described touch controlled key can be made up of one or more of metal material, timber, stone material or diamond material.
9. an electric cooking pot, is characterized in that, comprises the touch controlled key according to any one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146624.4U CN204442332U (en) | 2015-03-13 | 2015-03-13 | Touch controlled key and there is its electric cooking pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146624.4U CN204442332U (en) | 2015-03-13 | 2015-03-13 | Touch controlled key and there is its electric cooking pot |
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| Publication Number | Publication Date |
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| CN204442332U true CN204442332U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520146624.4U Active CN204442332U (en) | 2015-03-13 | 2015-03-13 | Touch controlled key and there is its electric cooking pot |
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| CN (1) | CN204442332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109743053A (en) * | 2019-01-09 | 2019-05-10 | 科世达（上海）管理有限公司 | A kind of soft-touch control and its control method |
-
2015
- 2015-03-13 CN CN201520146624.4U patent/CN204442332U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109743053A (en) * | 2019-01-09 | 2019-05-10 | 科世达（上海）管理有限公司 | A kind of soft-touch control and its control method |
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