CN215268226U - Touch button circuit, electronic scale circuit and electronic scale - Google Patents
Touch button circuit, electronic scale circuit and electronic scale Download PDFInfo
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- CN215268226U CN215268226U CN202120927085.3U CN202120927085U CN215268226U CN 215268226 U CN215268226 U CN 215268226U CN 202120927085 U CN202120927085 U CN 202120927085U CN 215268226 U CN215268226 U CN 215268226U
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Abstract
The utility model belongs to the electronic circuit field, the utility model provides a touch key circuit, electronic scale circuit and electronic scale, this touch key circuit realize touch key function through using simple resistance-capacitance circuit of microcontroller cooperation and integrated at inside time-recorder functional unit of microcontroller etc.. The touch key circuit is simple in circuit structure, and meanwhile, the microcontroller can directly detect interference in a strong interference state and take anti-interference countermeasures to improve the reliability of the touch key circuit. And the utility model provides a touch key circuit technical scheme, the circuit is simple, low cost.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a touch key circuit, electronic scale circuit and electronic scale.
Background
Electronic scales are one type of weighing apparatus, and measure the mass of an object using hooke's law or the principle of lever balance of force. At present, most electronic scale circuits with touch keys on the market use a scheme of matching a microcontroller with a special touch chip, wherein the touch chip operates independently and is not controlled by the microcontroller, so that the microcontroller cannot accurately scan the key operation of a user, the problems of key failure, key misoperation and the like are easy to occur, the anti-interference capability is poor, and the power consumption is high.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a touch key circuit for solving the problems of high power consumption and poor interference resistance in the prior art.
In a first aspect, an embodiment of the present invention provides a touch key circuit, including:
the key module is connected with the microcontroller, and comprises a resistance-capacitance circuit and a key unit, wherein the key unit comprises a conductive electrode and an insulating dielectric substance covering the conductive electrode, and is used for detecting whether a human body has key action or not and transmitting key action information to the microcontroller;
and the microcontroller is connected with the key module and used for receiving the key action information transmitted by the key module and executing corresponding key functions.
Preferably, the resistance-capacitance circuit comprises a capacitor and a resistor, the resistor is connected in parallel with the capacitor, and the capacitance value can adjust the time length of charging and discharging, so that the effect of adjusting the touch sensitivity is achieved. The larger the capacitance value is, the less the charging and discharging time is changed when the key is touched to act, and the more insensitive the key induction is; the smaller the capacitance value is, the larger the change of the charging and discharging time is when the key is touched to act, the more sensitive the key induction is, and under the limit condition, no capacitor is added, the capacitance value is 0, and the touch sensitivity is highest.
Preferably, the microcontroller is an 8-bit controller or a 32-bit controller.
Preferably, the insulating dielectric is any one of plastic, glass, bamboo board, or ceramic.
In a second aspect, the embodiment of the present invention provides an electronic scale circuit, including:
the weighing sensor module is connected with the microcontroller and is used for realizing a corresponding weighing function; and the source module is connected with the microcontroller unit and used for supplying power to the electronic scale circuit.
Preferably, the electronic scale circuit may further include: and the display module is connected with the microcontroller and is used for displaying the mass of the weighing object.
Preferably, the display module of the electronic scale circuit comprises at least one LCD or LED display screen and a backlight, the LCD or LED display screen is used for displaying the mass of the object to be weighed, and the LCD or LED display lamp is used for displaying the working state of the electronic scale.
Preferably, the electronic scale circuit may further include: the voice module is used for voice broadcasting the mass of the weighed object.
Preferably, the electronic scale circuit may further include: the clock function module is used for displaying time, alarm clock reminding or cooking countdown reminding.
Preferably, the electronic scale circuit may further include: and the Bluetooth module is used for transmitting the weighing information to the smart phone terminal.
In a third aspect, an embodiment of the present invention provides an electronic scale, including:
a housing and the electronic scale circuit.
To sum up, the utility model has the advantages that:
the embodiment of the utility model provides an among the touch key circuit, the button module is connected with microcontroller's input/output pin, thereby just make microcontroller can direct control keying unit's operation, for current circuit of taking the touch button, most uses is the dedicated touch chip of microcontroller collocation, because touch chip part independent operation does not receive microcontroller control, lead to the unable direct scan of microcontroller to user's button information, the button is malfunctioning to appear easily, button malfunction scheduling problem, and the consumption is high, and is with high costs. The circuit microcontroller can directly scan the key information of a user, so that the problems of key failure, key misoperation and the like are not easy to occur, the working reliability of the touch key circuit is improved, and the occurrence of working errors is reduced. The touch key detection circuit is simple in structure and low in cost.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings, and these drawings are all within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a touch key circuit according to a first embodiment of the present invention.
Fig. 2 is a circuit diagram of a key unit in a touch key circuit according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a conductive electrode in a touch key circuit according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a microcontroller in a touch key circuit and a peripheral circuit diagram thereof according to a first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an electronic scale circuit according to an embodiment of the present invention.
Fig. 6 is a circuit diagram of a load cell in an electronic scale circuit according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a display module in an electronic scale circuit according to an embodiment of the present invention.
Fig. 8 is a circuit diagram of a power module in an electronic scale circuit according to an embodiment of the present invention.
Fig. 9 is a circuit diagram of an electronic scale according to a third embodiment of the present invention.
Detailed Description
The features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The embodiments described below are merely illustrative, and the division of the modules or circuits is only one logical function division, and other divisions may be realized in practice. In the present embodiment and the drawings, elements irrelevant to the present invention have been omitted and are not shown, and the dimensional relationship between the elements in the drawings is only for easy understanding and is not intended to limit the actual scale.
Referring to fig. 1, a first embodiment of the present invention provides a touch key circuit, which includes:
at least one key module 1 and a microcontroller 2. The key module is used for detecting whether a human body has key actions or not and transmitting key information to the microcontroller; the microcontroller 2 is used for receiving the key information transmitted by the key module and realizing the function of touch keys.
Referring to fig. 2, the key module 1 includes a resistance-capacitance circuit 12 and a key unit 13, wherein the resistance-capacitance circuit includes a resistor R5 and a capacitor C6, and the resistor R5 is connected in parallel with the capacitor C6. One end of the resistance-capacitance circuit is connected with the key unit 13, and the other end is grounded.
Referring to fig. 3, the key unit 13 includes a conductive electrode U3 and an insulating dielectric 14 covering the conductive electrode U3, and the key unit 13 is connected to the rc circuit 12.
The microcontroller 2 may be an 8-bit microcontroller or a 32-bit microcontroller. In one embodiment, microcontroller 2 and its peripheral circuits are shown in FIG. 4, wherein pin PT21 of microcontroller 2 is connected to key module 1, and microcontroller 2 includes a timing function unit.
The working principle of the touch key circuit is as follows: the input/output pin PT21 of the microcontroller is set to high level to charge the capacitor C6 in the rc circuit 12, and after the capacitor C6 is full, the input/output pin PT21 of the microcontroller is set to input state. At this time, the capacitor C6 discharges through the resistor R5 in the rc circuit 12, and the microcontroller starts the timing function of the middle timing unit, and after the capacitor C6 finishes discharging, the input/output pin PT21 of the microcontroller changes from high level to low level, and the timer stops timing and saves the timing value. U3 is a conductive electrode, and when a human body touches the conductive electrode, the parasitic capacitance of the human body reduces the discharge rate.
The timing value of the timer is increased, which proves that the human body has key action and executes corresponding key function.
Because the button module 1 is connected with the input/output pin PT21 of the microcontroller 2 in the circuit, thereby the microcontroller can directly control the operation of the button unit, compared with the existing circuit with touch buttons, most of the circuits use the special touch chip matched with the microcontroller, because the independent operation of the touch chip part is not controlled by the microcontroller, the microcontroller can not directly scan the button information of the user, the button failure easily occurs, the button malfunction and other problems occur, the power consumption is high, and the cost is high. The circuit microcontroller can directly scan the key information of a user, so that the problems of key failure, key misoperation and the like are not easy to occur, the working reliability of the touch key circuit is improved, and the occurrence of working errors is reduced. The touch key detection circuit is simple in structure and low in cost.
Referring to fig. 5, a second embodiment of the present invention provides an electronic scale circuit, including:
the intelligent electronic device comprises a microcontroller 2, a key module 1, a weighing sensor module 3, a display module 4, a power module 5, a clock function module 6, a voice broadcast module 7 and a Bluetooth module 8. The weighing sensor 3 is connected with the microcontroller 2 to realize the corresponding weighing function; the display module 4 is connected with the microcontroller 2 and displays the mass of the weighing object according to the information transmitted and displayed by the measuring element of the weighing sensor; the clock function module 6 is connected with the microcontroller 2 and is used for displaying time, alarm clock reminding or cooking countdown reminding; the voice broadcasting module 7 is connected with the microcontroller 2 and is used for voice broadcasting the mass of the weighed object; the Bluetooth module 8 is connected with the microcontroller 2 and used for transmitting weighing information to the smart phone end; and the power supply module 5 is connected with the microcontroller 2 and supplies power to the whole electronic scale circuit.
In one embodiment, as shown in FIG. 6, load cell module 3 is comprised of four load cells, wherein the connection between each load cell is as shown in FIG. 6, wherein pin 2 of load cell 61 is connected to pin 6 of microcontroller 2; pin 2 of the load cell 62 is connected to pin 7 of the microcontroller 2; pin 2 of the load cell 63 is grounded; pin 2 of the load cell 64 is connected to pin 8 of the microcontroller 2;
in one embodiment, as shown in fig. 7, the display module 4 includes a display screen and an LED indicator, wherein the display screen may be an LED display screen or an LCD display screen. The backlight can make the electronic scale use in dark environment.
In one embodiment, a power module is shown in fig. 8 to provide power to the entire circuit.
In one embodiment, the electronic scale circuit further comprises a voice module, the voice module can broadcast the mass of the weighed object, and the voice broadcast function enables a user to know the mass of the weighed object by listening to voice without watching the numbers displayed in the display screen.
In one embodiment, the electronic scale circuit further comprises a clock function module for displaying a time, an alarm clock alert, or a cooking countdown alert.
In one embodiment, the electronic scale circuit further comprises a Bluetooth module, and the Bluetooth module is used for transmitting the weighing information to the smart phone terminal.
In one embodiment, as shown in fig. 9, a specific circuit diagram of an electronic scale circuit is shown.
The microcontroller in the electronic scale circuit can adjust the working state of the touch part circuit according to different working modes of the electronic scale, the touch key circuit works stably and is controlled, and the working reliability of the touch key circuit can be improved. The frequency of scanning the touch key is reduced when the key is not allowed to be used, thereby reducing power consumption. In addition, in a strong interference state, the microcontroller can directly detect the interference and take anti-interference countermeasures.
Simultaneously, bluetooth module in the electronic scale circuit can also realize the transmission of the information of weighing, and after the information of weighing transmitted the cell-phone end, the relevant APP of cell-phone can carry out the content analysis etc. of food business composition to the information of receiving.
Meanwhile, the touch key module circuit in the electronic scale circuit is simple in structure, strong in anti-interference capability, high in reliability and low in cost.
The embodiment three of the utility model provides an electronic scale product, the product includes:
the electronic scale circuit and the housing as described in embodiment two.
The electronic scale circuit in the electronic scale product has the advantages of simple circuit structure, high working reliability, low cost and convenience and rapidness in use.
Having described in detail the touch key circuitry provided by the present invention, those of skill in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular use and design constraints imposed on the overall system. The skilled person can implement the described functionality in different ways for each specific use, and all changes from the equivalent structures or equivalent flow diagrams made from the content of the description and the drawings, or directly or indirectly applied to other related technical fields, are equally covered by the scope of protection of the present invention. And should not be construed as limiting the invention.
Claims (10)
1. A touch key circuit, comprising:
the key module is connected with the microcontroller, and comprises a resistance-capacitance circuit and a key unit, wherein the key unit comprises a conductive electrode and an insulating dielectric substance covering the conductive electrode, and is used for detecting whether a human body has key action or not and transmitting key action information to the microcontroller;
and the microcontroller is connected with the key module and used for receiving the key action information transmitted by the key module and executing corresponding key functions.
2. The touch key circuit of claim 1, wherein the rc circuit comprises at least a capacitor and a resistor, the resistor and the capacitor being connected in parallel; the capacitance value can adjust the time length of charging and discharging, thereby achieving the effect of adjusting the touch sensitivity; the larger the capacitance value is, the less the charging and discharging time is changed when the key is touched to act, and the more insensitive the key induction is; the smaller the capacitance value is, the larger the change of the charging and discharging time is when the key is touched to act, the more sensitive the key induction is, and under the limit condition, no capacitor is added, the capacitance value is 0, and the touch sensitivity is highest.
3. Touch key circuit according to claim 1 or 2, characterised in that the microcontroller is an 8-bit microcontroller or a 32-bit microcontroller.
4. The circuit according to claim 1 or 2, wherein the insulating dielectric is any of plastic, glass, ceramic, or bamboo board.
5. An electronic scale circuit, characterized in that, the electronic scale circuit includes:
the touch key circuit of any one of claims 1-4; and:
the weighing sensor module is connected with the microcontroller and is used for realizing a corresponding weighing function;
and the power supply module is connected with the microcontroller unit and used for supplying power to the electronic scale circuit.
6. The electronic scale circuit according to claim 5,
the electronic scale circuit further comprises:
and the display unit is connected with the microcontroller and is used for displaying the mass of the weighed object.
7. The electronic scale circuit of claim 5, wherein the display module comprises: the electronic scale comprises at least one LCD display screen or LED display screen and a backlight, wherein the LCD display screen or LED display screen is used for displaying the mass of a weighed object, and the LCD or LED indicator lamp is used for displaying the working state of the electronic scale.
8. An electronic scale circuit according to any one of claims 5-7, further comprising a clock function module for displaying a time, an alarm clock alert, or a cooking countdown alert.
9. The electronic scale circuit according to any one of claims 5-7, further comprising a Bluetooth module for transmitting weighing information to the smartphone end.
10. An electronic scale, characterized in that the electronic scale comprises a housing and an electronic scale circuit according to any one of claims 5-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120927085.3U CN215268226U (en) | 2021-04-30 | 2021-04-30 | Touch button circuit, electronic scale circuit and electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120927085.3U CN215268226U (en) | 2021-04-30 | 2021-04-30 | Touch button circuit, electronic scale circuit and electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215268226U true CN215268226U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120927085.3U Active CN215268226U (en) | 2021-04-30 | 2021-04-30 | Touch button circuit, electronic scale circuit and electronic scale |
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| Country | Link |
|---|---|
| CN (1) | CN215268226U (en) |
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2021
- 2021-04-30 CN CN202120927085.3U patent/CN215268226U/en active Active
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