CN220492974U - Circuit for realizing multiple control functions by single key - Google Patents
Circuit for realizing multiple control functions by single key Download PDFInfo
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- CN220492974U CN220492974U CN202322178320.3U CN202322178320U CN220492974U CN 220492974 U CN220492974 U CN 220492974U CN 202322178320 U CN202322178320 U CN 202322178320U CN 220492974 U CN220492974 U CN 220492974U
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- 239000003990 capacitor Substances 0.000 claims description 27
- 239000011324 bead Substances 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model provides a circuit for realizing multiple control functions by a single key, which comprises a first switch module and a plurality of second switch modules, wherein the first switch module and the second switch modules are connected in parallel, a signal input end is connected with a signal output end of the key, the signal output end is respectively provided with a function pin connected with different control function pins of the control module, the first switch module comprises a first resistor and a first switch unit, and the output end of the first switch unit is connected with the first control function pin of the control module; the second switch module comprises a delay unit and a second switch unit, and the output end of the second switch unit is connected with a second control function pin of the control module. According to the utility model, through one key and the plurality of switch modules connected with the key in parallel, a plurality of functions can be controlled, and the number of keys is effectively reduced.
Description
Technical Field
The utility model relates to the field of key circuits, in particular to a circuit for realizing multiple control functions by a single key.
Background
The existing electronic products have more and more functions, but the volume is increasingly miniaturized, and the area of an internal main board is smaller and smaller, so that keys are fewer and fewer, and the function expansion cannot be met.
Therefore, how to realize multiple functions by a single key becomes the current research and development focus.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a circuit for realizing multiple control functions by a single key.
The circuit for realizing multiple control functions by a single key comprises a first switch module and a plurality of second switch modules, wherein the first switch module and the second switch modules are connected in parallel, a signal input end is connected with a signal output end of the key, the signal output end is respectively provided with a function pin connected with different control function pins of the control module, the first switch module comprises a first resistor and a first switch unit, one end of the first resistor is connected with the signal output end of the key, the other end of the first resistor is connected with a control end of the first switch unit, and the output end of the first switch unit is connected with the first control function pin of the control module; the second switch module comprises a delay unit and a second switch unit, the signal input end of the delay unit is connected with the signal output end of the key, the signal output end of the delay unit is connected with the control end of the second switch unit, the output end of the second switch unit is connected with a second control function pin of the control module, and the delay time of the delay units on each second switch module is different, so that effective distinction of different control signals is realized.
Further, the electronic device further comprises an anti-static module, and the anti-static module is arranged at the key signal output end.
Further, the antistatic module comprises an ESD electrostatic discharge diode, a TVS tube, a transient voltage suppression tube, an inductor, and/or magnetic beads.
Further, the anti-static module is an ESD (electrostatic discharge) diode, two ends of the ESD diode are connected in parallel with two ends of the key, one end of the ESD diode is grounded, and the other end of the ESD diode is connected with a power supply.
Further, the circuit further comprises a first capacitor and a second capacitor, one ends of the first capacitor and the second capacitor are respectively connected with the signal input ends of the first switch module and the signal input ends of the plurality of second switch modules, and the other ends of the first capacitor and the second capacitor are respectively grounded.
Further, the first switch module and the second switch module are triodes, the collector electrodes of the triodes are grounded, and the emitting electrodes of the triodes are connected with control function pins of the control module.
Further, the delay unit comprises a second resistor and a third capacitor, one end of the second resistor is connected with the signal output end of the key, the other end of the second resistor is connected with one end of the third capacitor and the control end of the second switch module respectively, and the other end of the third capacitor is grounded.
Compared with the prior art, the utility model has the beneficial effects that: through a button and a plurality of switch modules parallelly connected with the button, just can realize a plurality of function control to can effectively reduce button quantity, satisfy the miniaturized requirement of product.
Drawings
In order to more clearly illustrate the utility model or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an embodiment of the present utility model.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the utility model may be combined with other embodiments.
In order to enable those skilled in the art to better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, one end of the single key SW100 of the present utility model is connected to the power source VBAT, and the other end is grounded, in this example, in order to explain the pins 4 and 5 of the key SW100, the key SW100 of the present utility model has the function of expanding the control function according to different pressing, and has no meaning of hardware structure, and cannot be considered that the pins 4 and 5 are necessarily present in the switch key of the present utility model.
The circuit comprises a first switch module and 2 second switch modules, and realizes control of three functions, wherein the first switch module and the 2 second switch modules are connected in parallel, a signal input end is connected with a signal output end of a key, the signal output end is respectively provided with a function pin connected with different control function pins of the control module, the first switch module comprises a first resistor R632 and a first switch unit Q603, one end of the first resistor R632 is connected with a signal output end of the key SW100, the other end of the first resistor R632 is connected with a control end of the first switch unit Q603, and the output end of the first switch unit Q603 is connected with a first control function pin of the control module; the second switch module comprises a delay unit and a second switch unit Q601/Q602, wherein the signal input end of the delay unit is connected with the signal output end of the key SW100, the signal output end of the delay unit is connected with the control end of the second switch unit Q601/Q602, and the output end of the second switch unit Q601/Q602 is connected with a second control function pin of the control module.
The delay unit of the embodiment adopts RC delay circuits consisting of resistors and capacitors, and the parameters of each delay circuit are different, so that the delay time is different.
Preferably, in this embodiment, an ESD electrostatic discharge diode ESD100 is further disposed at the signal output end of the key SW100 to prevent the damage of static electricity to the subsequent circuit when the key is pressed, and of course, the anti-static module in this embodiment may also use a TVS tube, a transient voltage suppression tube, an inductor and/or a magnetic bead, so as to ensure the safety of the circuit.
The example also includes a first capacitor C112 and a second capacitor C113, one ends of the first capacitor and the second capacitor are respectively connected with the signal input ends of the first switch module and the plurality of second switch modules, and the other ends of the first capacitor and the second capacitor are respectively grounded to filter the output signal, so that new stability is ensured, and various control signals can be correctly identified.
Preferably, the first switch module and the second switch module are triodes, the collector of each triode is grounded, and the emitter is connected with a control function pin of the control module. By utilizing the isolation function of the triode, the simultaneous control of the key SW100 under different voltages for different functional modules is realized.
The working principle of the utility model is as follows:
the key SW100 is pressed down, and the first switch unit Q603 is controlled by the first resistor R632 to realize the key action, so that the key action is completed in real time; the key SW100 presses an RC delay circuit formed by a resistor R631 and a capacitor C638 to control the second switch unit Q601 to delay by 0.5S so as to finish the function operation of the key 2; the key SW100 is pressed down, and the RC delay circuit formed by the resistor R120 and the capacitor C637 controls the first switch unit Q602 to delay 5S to finish the key 2 function operation; and so on, a plurality of key functions and control actions are realized by changing the RC value. For example, pressing a key to wake up the system of the device, pressing a 1S-3S key for a long time to realize a function requirement of the device, pressing a 5S key for a long time to realize power-off of the system of the device, and so on.
The above embodiments are preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, which includes but is not limited to the embodiments, and equivalent modifications according to the present utility model are within the scope of the present utility model.
Claims (7)
1. A circuit for realizing multiple control functions by a single key is characterized in that: comprises a first switch module and a plurality of second switch modules, wherein the first switch module and the second switch modules are connected in parallel, the signal input end is connected with the signal output end of the key, the signal output end is respectively provided with a function pin connected with different control function pins of the control module,
the first switch module comprises a first resistor and a first switch unit, one end of the first resistor is connected with the signal output end of the key, the other end of the first resistor is connected with the control end of the first switch unit, and the output end of the first switch unit is connected with a first control function pin of the control module;
the second switch module comprises a delay unit and a second switch unit, the signal input end of the delay unit is connected with the signal output end of the key, the signal output end of the delay unit is connected with the control end of the second switch unit, the output end of the second switch unit is connected with a second control function pin of the control module,
the delay time of the delay units on each second switch module is different.
2. The circuit for implementing multiple control functions with a single key according to claim 1, wherein: the anti-static module is arranged at the key signal output end.
3. The circuit for implementing multiple control functions with a single key according to claim 2, wherein: the anti-static module comprises an ESD electrostatic discharge diode, a TVS tube, a transient voltage suppression tube, an inductor and/or magnetic beads.
4. A circuit for implementing multiple control functions with a single key as defined in claim 3, wherein: the anti-static module is an ESD (electrostatic discharge) diode, two ends of the ESD diode are connected in parallel with two ends of the key, one end of the ESD diode is grounded, and the other end of the ESD diode is connected with a power supply.
5. The circuit for implementing multiple control functions with a single key according to claim 1, wherein: the circuit further comprises a first capacitor and a second capacitor, one ends of the first capacitor and the second capacitor are respectively connected with the signal input ends of the first switch module and the signal input ends of the plurality of second switch modules, and the other ends of the first capacitor and the second capacitor are respectively grounded.
6. The circuit for implementing multiple control functions by a single key according to any one of claims 1-5, wherein: the first switch module and the second switch module are triodes, the collector electrodes of the triodes are grounded, and the emitting electrodes are connected with control function pins of the control module.
7. The circuit for implementing multiple control functions by a single key according to any one of claims 1-5, wherein: the delay unit comprises a second resistor and a third capacitor, one end of the second resistor is connected with the signal output end of the key, the other end of the second resistor is connected with one end of the third capacitor and the control end of the second switch module respectively, and the other end of the third capacitor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322178320.3U CN220492974U (en) | 2023-08-14 | 2023-08-14 | Circuit for realizing multiple control functions by single key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322178320.3U CN220492974U (en) | 2023-08-14 | 2023-08-14 | Circuit for realizing multiple control functions by single key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220492974U true CN220492974U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322178320.3U Active CN220492974U (en) | 2023-08-14 | 2023-08-14 | Circuit for realizing multiple control functions by single key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220492974U (en) |
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2023
- 2023-08-14 CN CN202322178320.3U patent/CN220492974U/en active Active
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